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US 2004/0133383 A1Published application
Device and method for weighing concrete material
AssigneeObayashi Corporation
InventorsShigeyuki Sogo, Ryuichi Chikamatsu, Koji Watanabe, Hisayoshi Kikkawa
Life of this patent
Estimating the term…
Abstract
A measuring apparatus 1 of submergence aggregate according to the present invention generally comprises a stock bin 2 for storing fine aggregate, a fine aggregate feed hopper 3 placed under the stock bin 2, a vibrating feeder 5 placed under a discharge opening 4 of the fine aggregate feed hopper 3, a screen device 23 placed in the vicinity of an exit of the vibrating feeder 5, a measurement tank 6 placed under the screen device 23, an electrode-type displacement sensor 7 as means for measuring a water level placed above the measurement tank 6, and load cells 8 as mass measuring means for measuring a mass of the measurement tank 6.
Claims76
A measuring apparatus of concrete materials, comprising:
- an aggregate feed hopper for supplying aggregate;
- a measurement tank for containing the aggregate discharged from the aggregate feed hopper together with water as submergence aggregate;
- water level measuring means for measuring a water level of the submergence aggregate contained in said measurement tank;
- mass measuring means for measuring a mass of the submergence aggregate contained in said measurement tank.
1 more element
A measuring method of concrete materials, comprising the steps of:
- throwing aggregate and water into a predetermined measurement tank so that the aggregate is submerged in the water as submergence aggregate;
- and
- calculating mass Ma of the aggregate in a saturated surface-dried condition and mass Mw of the water by solving the following two formulas:
- Ma+Mw=Mf (1) Ma/ρa+Mw/ρw=Vf (2)
- where
- Mf=a total mass of the submergence aggregate;
- Vf=a total volume of the submergence aggregate;
- ρa=a density of the aggregate in the saturated surface-dried condition;
- and
- ρw=a density of the water.
7 more elements
A measuring apparatus of concrete materials, comprising:
- aggregate supply means for supplying aggregate;
- water supply means;
- a measurement tank for containing aggregate supplied from said aggregate supply means together with water supplied from said water supply means as submergence aggregate;
- and
- submergence aggregate mass measuring means for measuring a mass of the submergence aggregate in said measurement tank,
- wherein a bottom lid capable of maintaining watertightness inside the measurement tank is attached at a bottom opening of said measurement tank in such a way that the bottom lid is free to open or close;
- and
- wherein a predetermined opening for overflow is formed on a wall of said measurement tank at a predetermined height thereof so that water in said measurement tank overflows outside.
5 more elements
A measuring method of concrete materials, comprising the steps of:
- throwing water and aggregate into a measurement tank having an opening for overflow formed thereon so that the aggregate is submerged in the water as submergence aggregate and so that the water overflows from the opening for overflow;
- measuring total mass Mf of the submergence aggregate;
- and
- calculating mass Ma of the aggregate in a saturated surface-dried condition and mass Mw of the water from the fact that an internal volume at overflow from said measurement tank is equal to total volume Vf of the submergence aggregate by solving the following two formulas:
- Ma+Mw=Mf (1) Ma/ρa+Mw/ρw=Vf (2)
- where ρa is a density of the aggregate in the saturated surface-dried condition and ρw is a density of the water.
3 more elements
A measuring apparatus of concrete materials, comprising:
- an aggregate measurement container for storing aggregate to be measured;
- aggregate mass measuring means for measuring a mass of the aggregate in said aggregate measurement container;
- and
- a submergence aggregate container for storing the aggregate in said aggregate measurement container together with water as submergence aggregate,
- wherein a bottom lid capable of maintaining watertightness inside the submergence aggregate container is attached at a bottom opening of said submergence aggregate container in such a way that the bottom lid is free to open or close;
- wherein a predetermined opening for overflow is formed on a wall of said submergence aggregate container at a predetermined height thereof so that water in said submergence aggregate container overflows outside;
- and
- wherein there is provided overflow water measuring means for measuring a mass of the water overflowing from the opening for overflow.
5 more elements
A measuring method of concrete materials, comprising the steps of:
- measuring mass Maw of aggregate;
- throwing aggregate and water into a submergence aggregate container having an opening for overflow formed thereon so that the aggregate is submerged in the water as submergence aggregate and so that the water overflows from the opening for overflow;
- measuring mass MI of the supplied water and mass MO of the overflow water as accumulation values;
- calculating mass Ma of the aggregate in a saturated surface-dried condition and mass Mw of the water in the submergence aggregate from the fact that an internal volume at overflow from said submergence aggregate container is equal to total volume Vf of the submergence aggregate by solving the following two formulas:
- Ma+Mw=Maw+(MI−MO) (5) Ma/ρa+Mw/ρw=Vf (2)
- where ρa is a density of the aggregate in the saturated surface-dried condition and ρw is a density of the water;
- and
- calculating a percentage of surface moisture of the aggregate by solving the following formula:
- (Maw−Ma)/Ma (3)
6 more elements
A measuring method of concrete materials, comprising the steps of:
- throwing aggregate of a first kind and water into a predetermined measurement tank so that the aggregate is submerged in the water as submergence aggregate;
- measuring total mass Mf1 of the submergence aggregate;
- calculating mass Ma1 of the aggregate of the first kind in a saturated surface-dried condition by solving the following two formulas:
- Ma1+Mw=Mf1 (7) Ma1/ρa1+Mw/ρw=Vf1 (8)
- where Vf1 is a total volume of the submergence aggregate, ρa1 is a density of the aggregate of the first kind in the saturated surface-dried condition, and ρw is a density of the water;
- throwing aggregate of a second kind and required water into said measurement tank so that the aggregate of the second kind is submerged in the water as submergence aggregate;
- measuring total mass Mf2 of the submergence aggregate;
- calculating mass Ma2 of the aggregate of the second kind in a saturated surface-dried condition by solving the following two formulas:
- Ma1+Ma2+Mw=Mf2 (9) Ma1/ρa1+Ma2/ρa2+Mw/ρw=Vf2 (10)
- where Vf2 is a total volume of the submergence aggregate and ρa2 is a density of the aggregate of the second kind in the saturated surface-dried condition;
- hereinafter, repeating the above procedure for sequential calculation up to mass Ma(N−1) of aggregate of an (N−1)th kind in a saturated surface-dried condition;
- finally throwing aggregate of an Nth kind and required water into said measurement tank so that the aggregate of the Nth kind is submerged in the water as submergence aggregate;
- measuring total mass MfN of the submergence aggregate;
- and
- calculating mass MaN of aggregate of the Nth kind in a saturated surface-dried condition and mass Mw of the water by solving the following two formulas:
- ΣMai (i=1 to (N−1))+MaN+Mw=MfN (11) ΣMai/ρai (i=1 to (N−1))+MaN/ρaN+Mw/ρw=VfN (12)
- where VfN is a total volume of the submergence aggregate and ρaN is a density of the aggregate of the Nth kind in the saturated surface-dried condition.
14 more elements
A measuring method of concrete materials, comprising the steps of:
- measuring mass Mawi of aggregate of an i-th kind (i=1 to N) in wet condition;
- throwing water and aggregate of a first kind into a predetermined submergence aggregate container so that the first aggregate is submerged in the water as submergence aggregate and so that a total volume of the submergence aggregate is maintained at a steady value Vf;
- measuring mass MI of water supplied to said submergence aggregate container and mass MO of water discharged from said submergence aggregate container as accumulation values;
- calculating mass Ma1 of the aggregate of the first kind in a saturated surface-dried condition by solving the following two formulas:
- Ma1+Mw=Maw1+(MI−MO) (16) Ma1/ρa1+Mw/ρw=Vf (17)
- where ρa1 is a density of the aggregate of the first kind in the saturated surface-dried condition and ρw is a density of the water;
- calculating a percentage of surface moisture of the aggregate of the first kind by solving the following formula:
- (Maw1−Ma1)/Ma1 (18)
- throwing aggregate of a second kind and required water into said submergence aggregate container so that the aggregate of the second kind is submerged in the water as submergence aggregate and so that the total volume of the submergence aggregate is maintained at the steady value Vf;
- measuring mass MI of the supplied water and mass MO of the discharged water as accumulation values;
- calculating mass Ma2 of the aggregate of the second kind in a saturated surface-dried condition by solving the following two formulas:
- Ma1+Ma2+Mw=Maw1+Maw2+(MI−MO) (19) Ma1/ρa1+Ma2/ρa2+Mw/ρw=Vf (20)
- where ρa2 is a density of the aggregate of the second kind in the saturated surface-dried condition;
- calculating a percentage of surface moisture of the aggregate of the second kind by solving the following formula:
- (Maw2−Ma2)/Ma2 (21)
- hereinafter, repeating the above procedure for sequential calculation up to mass Ma(N−1) of aggregate of an (N−1)th kind in a saturated surface-dried condition;
- finally throwing aggregate of an Nth kind and required water into said submergence aggregate container so that the aggregate of the Nth kind is submerged in the water as submergence aggregate and so that the total volume of the submergence aggregate is maintained at the steady value Vf;
- measuring mass MI of the supplied water and mass MO of the discharged water as accumulation values;
- calculating mass MaN of the aggregate of the Nth kind in a saturated surface-dried condition and mass Mw of the water by solving the following two formulas:
- ΣMai (i=1 to (N−1))+MaN+Mw=Σ(Mawi (i=1 to (N−1))+MawN+(MI−MO) (22) Σ(Mai/ρai) (i=1 to (N−1))+MaN/ρaN+Mw/ρw=Vf (23)
- where ρaN is a density of the aggregate of the Nth kind in the saturated surface-dried condition;
- and
- calculating a percentage of surface moisture of the aggregate of the Nth kind by solving the following formula:
- (MawN−MaN)/MaN (24)
21 more elements
A measuring method of concrete materials, comprising the steps of:
- calculating a mean-density ρave of whole aggregate from a mass ratio of aggregate of an i-th kind (i=1 to N) and density ρai (i=1 to N) of the aggregate of the i-th kind (i=1 to N) in a saturated surface-dried condition;
- throwing the aggregate of the i-th kind (i=1 to N) and water into a predetermined measurement tank so that the aggregate of the i-th kind (i=1 to N) is submerged in the water as submergence aggregate;
- measuring total mass Mf of the submergence aggregate;
- and
- calculating summation ΣMai (i=1 to N), that is, total mass of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition and mass Mw of the water by solving the following two formulas:
- ΣMai (i=1 to N)+Mw=Mf (25) ΣMai (i=1 to N)/ρave+Mw/ρw=Vf (26)
- where Vf is a total volume of the submergence aggregate and ρw is a density of the water.
4 more elements
A measuring method of concrete materials comprising the steps of:
- measuring summation ΣMawi (i=1 to N), that is, total mass of the aggregate of the i-th kind (i=1 to N) in wet condition;
- calculating a mean-density ρave of whole aggregate from a mass ratio of the aggregate of the i-th kind (i=1 to N) and density ρai (i=1 to N) of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition;
- throwing the aggregate of the i-th kind (i=1 to N) and water into a predetermined submergence aggregate container so that the aggregate of the i-th kind (i=1 to N) is submerged in the water as submergence aggregate and so that a total volume of the submergence aggregate is maintained at a steady value Vf;
- measuring mass MI of water supplied to said submergence aggregate container and mass MO of water discharged from said submergence aggregate container as accumulation values;
- calculating summation ΣMai (i=1 to N), that is, total mass of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition and mass Mw of the water in said submergence aggregate by solving the following two formulas:
- ΣMai (i=1 to N)+Mw=ΣMawi (i=1 to N)+(MI−MO) (29) ΣMai (i=1 to N)/ρave+Mw/ρw=Vf (30)
- where ρw is a density of the water;
- and
- calculating an average percentage of surface moisture of the aggregate of the i-th kind (i=1 to N) by solving the following formula:
- (ΣMawi (i=1 to N)−ΣMai (i=1 to N))/ΣMai (i=1 to N) (31)
7 more elements
A measuring method of concrete materials, comprising the steps of:
- throwing aggregate and water into a predetermined measurement tank so that the aggregate is submerged in the water as submergence aggregate;
- measuring total mass Mf of the submergence aggregate;
- and
- calculating mass Ma of the aggregate in a saturated surface-dried condition and mass Mw of the water by solving the following two formulas:
- Ma+Mw=Mf (1) Ma/ρa+Mw/ρw=Vf (2)
- where Vf is a total volume of the submergence aggregate, ρa is a density of the aggregate in the saturated surface-dried condition, and ρw is a density of the water,
- wherein the aggregate is thrown into the measurement tank at a predetermined speed and continuously or intermittently while measuring the total mass Mf of the submergence aggregate in real time or at predetermined time intervals and throwing the aggregate is terminated when the mass Ma of the aggregate in the saturated surface-dried condition reaches a scheduled input.
4 more elements
A measuring method of concrete materials, comprising the steps of:
- throwing aggregate of a first kind and water into a predetermined measurement tank so that the aggregate is submerged in the water as submergence aggregate;
- measuring total mass Mf1 of the submergence aggregate;
- calculating mass Ma1 of the aggregate of the first kind in a saturated surface-dried condition by solving the following two formulas:
- Ma1+Mw=Mf1 (7) Ma1/ρa1+Mw/ρw=Vf1 (8)
- where Vf1 is a total volume of the submergence aggregate, ρa1 is a density of the aggregate of the first kind in the saturated surface-dried condition, and ρw is a density of the water;
- throwing aggregate of a second kind and required water into said measurement tank so that the aggregate of the second kind is submerged in the water as submergence aggregate;
- measuring total mass Mf2 of the submergence aggregate;
- calculating mass Ma2 of the aggregate of the second kind in a saturated surface-dried condition by solving the following two formulas:
- Ma1+Ma2+Mw=Mf2 (9) Ma1/ρa1+Ma2/ρa2+Mw/ρw=Vf2 (10)
- where Vf2 is a total volume of the submergence aggregate and ρa2 is a density of the aggregate of the second kind in the saturated surface-dried condition;
- hereinafter, repeating the above procedure for sequential calculation up to mass Ma(N−1) of aggregate of an (N−1)th kind in a saturated surface-dried condition;
- finally throwing aggregate of an Nth kind and required water into said measurement tank so that the aggregate of the Nth kind is submerged in the water as submergence aggregate;
- measuring total mass MfN of the submergence aggregate;
- and
- calculating mass MaN of the aggregate of the Nth kind in a saturated surface-dried condition and mass Mw of the water by solving the following two formulas:
- ΣMai (i=1 to (N−1))+MaN+Mw=MfN (11) ΣMai/ρai (i=1 to (N−1))+MaN/ρaN+Mw/ρw=VfN (12)
- where VfN is a total volume of the submergence aggregate and ρaN is a density of the aggregate of the Nth kind in the saturated surface-dried condition,
- wherein the aggregate of the i-th kind (i=1 to N) is thrown into the measurement tank at a predetermined speed and continuously or intermittently while measuring the total mass Mfi (i=1 to N) of the submergence aggregate in real time or at predetermined time intervals and throwing the aggregate of the i-th kind (i=1 to N) is terminated when the mass Mai (I=1 to N) of the aggregate in the saturated surface-dried condition reaches a scheduled input.
15 more elements
A measuring method of concrete materials, comprising the steps of:
- calculating a mean-density ρave of whole aggregate from a mass ratio of aggregate of an i-th kind (i=1 to N) and density ρai (i=1 to N) of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition;
- throwing the aggregate of the i-th kind (i=1 to N) and water into a predetermined measurement tank so that the aggregate of the i-th kind (i=1 to N) is submerged in the water as submergence aggregate;
- measuring total mass Mf of the submergence aggregate;
- and
- calculating summation ΣMai (i=1 to N), that is, total mass of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition and mass Mw of the water by solving the following two formulas:
- ΣMai (i=1 to N)+Mw=Mf (25) ΣMai (i=1 to N)/ρave+Mw/ρw=Vf (26)
- where Vf is a total volume of the submergence aggregate and ρw is a density of the water, wherein the aggregate of the i-th kind (i=1 to N) is thrown into the measurement tank at a predetermined speed and continuously or intermittently while measuring the total mass Mf of the submergence aggregate in real time or at predetermined time intervals and throwing the aggregate of the i-th kind (i=1 to N) is terminated when the summation ΣMai (i=1 to N) of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition reaches a scheduled input.
4 more elements
A measuring method of concrete materials, comprising the steps of:
- setting target mass Mdi (i=1 to N) of submergence aggregate at an end of throwing aggregate of an i-th kind (i=1 to N);
- throwing aggregate of a first kind and water into a predetermined measurement tank so that the aggregate of the first kind is submerged in the water as submergence aggregate;
- measuring total mass Mf1 of the submergence aggregate;
- measuring total volume Vf1 of the submergence aggregate;
- calculating mass Mai of the aggregate of the first kind in a saturated surface-dried condition by substituting the total mass Mf1 and the total volume Vf1 of the submergence aggregate for the following formula:
- Mai=ρa1(Mf1−ρwVf1)/(ρa1−ρw) (32)
- where ρa1 is a density of the aggregate of the first kind in the saturated surface-dried condition and ρw is a density of the water;
- throwing aggregate of a second kind into said measurement tank so that the aggregate of the second kind is submerged in the water as submergence aggregate;
- measuring total mass Mf2 of the submergence aggregate;
- measuring total volume Vf2 of the submergence aggregate;
- calculating mass Ma2 of the aggregate of the second kind in a saturated surface-dried condition by substituting the total mass Ma2 and the total volume Va2 of the submergence aggregate for the following formula:
- Ma2=ρa2((Mf2−Ma1)−ρw(Vf2−Ma1/ρa1))/(ρa2−ρw) (33)
- where ρa1 is a density of the aggregate of the first kind in the saturated surface-dried condition, ρa2 is a density of the aggregate of the second kind in the saturated surface-dried condition, and ρw is a density of the water;
- hereinafter, repeating the above procedure for sequential calculation up to mass Ma(N−1) of aggregate of an (N−1)th kind in a saturated surface-dried condition;
- finally throwing aggregate of an Nth kind into said measurement tank so that the aggregate of the Nth kind is submerged in the water as submergence aggregate;
- measuring total mass MfN of the submergence aggregate;
- and
- calculating mass MaN of the aggregate of the Nth kind in a saturated surface-dried condition and mass Mw of the water by substituting the total mass MfN and the total volume VfN of the submergence aggregate for the following formulas:
- MaN=ΣaN((MfN−ΣMai (i=1 to (N−1)))−ρw(VfN−Σ(Mai/ρai) (i=1 to (N−1))))/(ρaN−ρw) (34) Mw=ρw(ρaN(VfN−Σ(Mai/ρai) (i=1 to (N−1)))−(MfN−ΣMai (i=1 to (N−1))))/(ρaN−ρw) (35)
- where ρa1 (i=1 to N) is a density of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition and ρw is a density of the water;
- wherein the aggregate of the i-th kind (i=1 to N) is thrown into the measurement tank at a predetermined speed and continuously or intermittently while measuring the total mass Mfi (i=1 to N) of the submergence aggregate in real time or at predetermined time intervals and throwing aggregate of a jth kind is terminated when total mass Mfj of the submergence aggregate in the aggregate of the i-th kind (i=1 to N) reaches the target mass Mdj of the submergence aggregate at the end of throwing the aggregate of the jth kind during throwing the aggregate of the jth kind.
18 more elements
A measuring method of concrete materials, comprising the steps of:
- setting target mass Mdi (i=1 to N) of submergence aggregate at an end of throwing aggregate of an i-th kind (i=1 to N);
- throwing aggregate of a first kind and water into a predetermined measurement tank so that the aggregate of the first kind is submerged in the water as submergence aggregate;
- measuring total mass Mf1 of the submergence aggregate;
- calculating mass Ma1 of the aggregate of the first kind in a saturated surface-dried condition by substituting the total mass Mf1 of the submergence aggregate and total volume Vf1 of the submergence aggregate corresponding to a preset first water level for the following formula:
- Ma1=ρa1(Mf1−ρwVf1)/(ρa1−ρw) (32)
- where ρa1 is a density of the aggregate of the first kind in the saturated surface-dried condition and ρw is a density of the water;
- throwing aggregate of a second kind into said measurement tank so that the aggregate of the second kind is submerged in the water as submergence aggregate;
- measuring total mass Mf2 of the submergence aggregate;
- calculating mass Ma2 of the aggregate of the second kind in a saturated surface-dried condition by substituting the total mass Ma2 of the submergence aggregate and the total volume Va2 of the submergence aggregate corresponding to a preset second water level for the following formula:
- Ma2=ρa2((Mf2−Ma1)−ρw(Vf2−Ma1/ρa1))/(ρa2−ρw) (33)
- where ρa1 is a density of the aggregate of the first kind in the saturated surface-dried condition, ρa2 is a density of the aggregate of the second kind in the saturated surface-dried condition, and ρw is a density of the water;
- hereinafter, repeating the above procedure for sequential calculation up to mass Ma(N−1) of aggregate of an (N−1)th kind in a saturated surface-dried condition;
- finally throwing aggregate of an Nth kind into said measurement tank so that the aggregate of the Nth kind is submerged in the water as submergence aggregate;
- measuring total mass MfN of the submergence aggregate;
- and
- calculating mass MaN of the aggregate of the Nth kind in a saturated surface-dried condition and mass Mw of the water by substituting the total mass MfN of the submergence aggregate and the total volume VfN of the submergence aggregate corresponding to a preset Nth water level for the following formulas:
- MaN=ρaN((MfN−ΣMai (i=1 to (N−1)))−ρw(VfN−Σ(Mai/Σai) (i=1 to (N−1))))/(ρaN−ρw) (34) Mw=ρw(ρaN(VfN−Σ(Mai/Σai) (i=1 to (N−1)))−(MfN−ΣMai (i=1 to (N−1))))/(ρaN−ρw) (35)
- where ρai (i=1 to N) is a density of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition and ρw is a density of the water;
- wherein the aggregate of the i-th kind (i=1 to N) is thrown into the measurement tank at a predetermined speed and continuously or intermittently while measuring the total mass Mfi (i=1 to N) of the submergence aggregate in real time or at predetermined time intervals and throwing aggregate of a jth kind is terminated when total mass Mfj of the submergence aggregate in the aggregate of the i-th kind (i=1 to N) reaches the target mass Mdj of the submergence aggregate during throwing the aggregate of the jth kind while excess water is discharged so that the water level of the submergence aggregate does not exceed a preset jth water level and wherein, unless the water level of the submergence aggregate at that time reaches the preset jth water level, water is added so that it reaches the jth water level for re-measuring the total mass Mfj of the submergence aggregate and re-calculating the mass Maj of the aggregate of the jth kind in the saturated surface-dried condition and the mass Mw of the water.
16 more elements
A program for an execution of measuring and calculating concrete materials, wherein said program is used to perform the steps of:
- performing an input operation via predetermined input means with entering density ρai (i=1 to N) of aggregate of an i-th kind (i=1 to N) in a saturated surface-dried condition, density ρw of water, and target mass Mdi (i=1 to N) of submergence aggregate at an end of throwing the aggregate of the i-th kind (i=1 to N) and storing them into storage means;
- throwing aggregate of a first kind and water into a predetermined measurement tank so that the aggregate of the first kind is submerged in the water as submergence aggregate;
- measuring total mass Mf1 of the submergence aggregate;
- measuring total volume Vf1 of the submergence aggregate;
- reading the density ρa1 of the aggregate of the first kind in the saturated surface-dried condition and the density ρw of the water previously stored in said storage means therefrom;
- calculating mass Ma1 of the aggregate of the first kind in the saturated surface-dried condition with calculation means by substituting the total mass Mf1 and the total volume Vf1 of the submergence aggregate for the following formula:
- Ma1=ρa1(Mf1−ρwVf1)/(ρa1−ρw) (32)
- where ρa1 is the density of the aggregate of the first kind in the saturated surface-dried condition and ρw is the density of the water, which have been read;
- storing a result of the calculation in said storage means;
- throwing aggregate of a second kind into said measurement tank so that the aggregate of the second kind is submerged in the water as submergence aggregate;
- measuring total mass Mf2 of the submergence aggregate;
- measuring total volume Vf2 of the submergence aggregate;
- reading density ρa1 of the aggregate of the first kind in the saturated surface-dried condition, density ρa2 of the aggregate of the second kind in the saturated surface-dried condition, and density ρw of the water previously stored in said storage means therefrom;
- calculating mass Ma2 of the aggregate of the second kind in the saturated surface-dried condition with the calculation means by substituting the total mass Mf2 and the total volume Vf2 of the submergence aggregate for the following formula:
- Ma2=ρa2((Mf2−Ma1)−ρw(Vf2−Ma1/ρa1))/(ρa2−ρw) (33)
- where ρa1 is the density of the aggregate of the first kind in the saturated surface-dried condition, ρa2 is the density of the aggregate of the second kind in the saturated surface-dried condition, and ρw is the density of the water, which have been read;
- storing a result of the calculation in said storage means;
- repeating the above procedure with said calculation means hereinafter for sequential calculation up to mass Ma(N−1) of aggregate of an (N−1) th kind in a saturated surface-dried condition;
- storing a result of the calculation in said storage means;
- throwing finally aggregate of an Nth kind into said measurement tank so that the aggregate of the Nth kind is submerged in the water as submergence aggregate;
- measuring total mass MfN of the submergence aggregate;
- measuring total volume VfN of the submergence aggregate;
- and
- calculating mass MaN of the aggregate of the Nth kind in the saturated surface-dried condition and mass Mw of the water with said calculation means by substituting the total mass MfN and the total volume VfN of the submergence aggregate for the following formulas:
- MaN=ρaN((MfN−ΣMai (i=1 to (N−1)))−ρw(VfN−Σ(Mai/ρai) (i=1 to (N−1))))/(ρaN−ρw) (34) Mw=ρw(ρaN(VfN−Σ(Mai/ρai) (i=1 to (N−1)))−(MfN−ΣMai (i=1 to (N−1))))/(ρaN−ρw) (35)
- where ρai (i=1 to N) is the density of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition and ρw is the density of the water, which have been read;
- wherein the aggregate of the i-th kind (i=1 to N) is thrown into said measurement tank at a predetermined speed and continuously or intermittently while measuring the total mass Mfi (i=1 to N) of the submergence aggregate in real time or at predetermined time intervals and throwing aggregate of a jth kind is terminated when total mass Mfj of the submergence aggregate in the aggregate of the i-th kind (i=1 to N) reaches the target mass Mdj of the submergence aggregate during throwing the aggregate of the j th kind.
24 more elements
A program for an execution of measuring and calculating concrete materials, wherein said program is used to perform the steps of:
- performing an input operation via predetermined input means with entering density ρai (i=1 to N) of aggregate of an i-th kind (i=1 to N) in a saturated surface-dried condition, density ρw of water, and target mass Mdi (i=1 to N) of submergence aggregate at an end of throwing the aggregate of the i-th kind (i=1 to N) and storing them into storage means;
- throwing aggregate of a first kind and water into a predetermined measurement tank so that the aggregate of the first kind is submerged in the water as submergence aggregate;
- measuring total mass Mf1 of the submergence aggregate;
- reading the density ρa1 of the aggregate of the first kind in the saturated surface-dried condition and the density ρw of the water previously stored in said storage means therefrom;
- calculating mass Ma1 of the aggregate of the first kind in the saturated surface-dried condition with calculation means by substituting the total mass Mf1 of the submergence aggregate and the total volume Vf1 of the submergence aggregate corresponding to a preset first water level for the following formula:
- Ma1=ρa1(Mf1−ρwVf1)/(ρa1−ρw) (32)
- where ρa1 is the density of the aggregate of the first kind in the saturated surface-dried condition and ρw is the density of the water, which have been read;
- storing a result of the calculation in said storage means;
- throwing aggregate of a second kind into said measurement tank so that the aggregate of the second kind is submerged in the water as submergence aggregate;
- measuring total mass Mf2 of the submergence aggregate;
- reading density ρa1 of the aggregate of the first kind in the saturated surface-dried condition, density ρa2 of the aggregate of the second kind in the saturated surface-dried condition, and density ρw of the water previously stored in said storage means therefrom;
- calculating mass Ma2 of the aggregate of the second kind in the saturated surface-dried condition with the calculation means by substituting the total mass Mf2 of the submergence aggregate and the total volume Vf2 of the submergence aggregate corresponding to a preset second water level for the following formula:
- Ma2=ρa2((Mf2−Ma1)−ρw(Vf2−Ma1/ρa1))/(ρa2−ρw) (33)
- where ρa1 is the density of the aggregate of the first kind in the saturated surface-dried condition, ρa2 is the density of the aggregate of the second kind in the saturated surface-dried condition, and ρw is the density of the water, which have been read;
- storing a result of the calculation in said storage means;
- repeating the above procedure with said calculation means hereinafter for sequential calculation up to mass Ma(N−1) of aggregate of an (N−1) th kind in a saturated surface-dried condition;
- storing a result of the calculation in said storage means;
- throwing finally aggregate of an Nth kind into said measurement tank so that the aggregate of the Nth kind is submerged in the water as submergence aggregate;
- measuring total mass MfN of the submergence aggregate;
- reading density ρai (i=1 to N) of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition and density ρw of the water;
- and
- calculating mass MaN of the aggregate of the Nth kind in the saturated surface-dried condition and mass Mw of the water with said calculation means by substituting the total mass MfN of the submergence aggregate and the total volume VfN of the submergence aggregate corresponding to a preset Nth water level for the following formulas:
- MaN=ρaN((MfN−ΣMai (i=1 to (N−1)))−ρw(VfN−Σ(Mai/ρai) (i=1 to (N−1))))/(ρaN−ρw) (34) Mw=ρw(ρaN(VfN−Σ(Mai/ρai) (i=1 to (N−1)))−(MfN−ΣMai (i=1 to (N−1))))/(ρaN−ρw) (35)
- where ρai (i=1 to N) is the density of the aggregate of the i-th kind (i=1 to N) in the saturated surface-dried condition and ρw is the density of the water, which have been read;
- wherein the aggregate of the i-th kind (i=1 to N) is thrown into said measurement tank at a predetermined speed and continuously or intermittently while measuring the total mass Mfi (i=1 to N) of the submergence aggregate in real time or at predetermined time intervals and throwing aggregate of a jth kind is terminated when total mass Mfj of the submergence aggregate in the aggregate of the i-th kind (i=1 to N) reaches the target mass Mdj of the submergence aggregate during throwing the aggregate of the jth kind while excess water is discharged so that the water level of the submergence aggregate at that time does not exceed the preset jth water level and wherein, unless the water level of the submergence aggregate at that time reaches the preset jth water level, water is added so that it reaches the jth water level for re-measuring the total mass Mfj of the submergence aggregate and re-calculating the mass Maj of the aggregate of the jth kind in the saturated surface-dried condition and the mass Mw of the water.
22 more elements
A discharge mechanism of a measurement container, having a constitution in which aggregate is contained with water as submergence aggregate in the measurement container when the bottom lid is closed for measuring the submergence aggregate and the submergence aggregate is discharged downward by opening the bottom lid after the measurement is finished, wherein a gas spraying mechanism is provided in the vicinity of said bottom lid and the top face of the bottom lid is sprayed with a gas flow by means of the gas spraying mechanism when the bottom lid is opened.
A discharge mechanism of a measurement container, having a constitution in which aggregate is contained with water as submergence aggregate in the measurement container when the bottom lid is closed for measuring the submergence aggregate and the submergence aggregate is discharged downward by opening the bottom lid after the measurement is finished, wherein said bottom lid is opened or closed by moving it in a translation direction or rotating it within a level surface and wherein a gas spraying mechanism is provided in the vicinity of said bottom lid and the top face of the bottom lid is sprayed with a gas flow by means of the gas spraying mechanism when the bottom lid is opened.
A discharge mechanism of a measurement container, having a constitution in which aggregate is contained with water as submergence aggregate in the measurement container when the bottom lid is closed for measuring the submergence aggregate and the submergence aggregate is discharged downward by opening the bottom lid after the measurement is finished, wherein said bottom lid is opened or closed by moving it in a translation direction or rotating it within a level surface.
A measuring apparatus of concrete materials, comprising:
- aggregate supply means for supplying aggregate;
- water supply means;
- a plurality of measurement containers for containing aggregate supplied from said aggregate supply means together with water supplied from said water supply means as submergence aggregate;
- submergence aggregate mass measuring means for measuring a mass of the submergence aggregate in said plurality of measurement containers;
- water level measuring means for measuring a water level of the submergence aggregate in said plurality of measurement containers;
- and
- water level regulation means for regulating the water level of said submergence aggregate by discharging water from said plurality of measurement containers,
- wherein a bottom lid capable of maintaining watertightness inside each of said plurality of measurement containers is attached at a bottom opening of each of said plurality of measurement containers in such a way that the bottom lid is free to open or close and volumes of said plurality of measurement containers differ from each other at a normal water level where they have the same depth;
- and
- wherein a measurement container is selected for measurement out of said plurality of measurement containers according to a required mass of aggregate and said water level regulation means is driven and controlled so that the water level of the submergence aggregate in the measurement container is maintained at said normal water level while measuring and monitoring the water level with said water level measuring means.
7 more elements
A measuring apparatus of concrete materials, comprising:
- aggregate supply means for supplying aggregate;
- water supply means;
- a plurality of measurement containers for containing aggregate supplied from said aggregate supply means together with water supplied from said water supply means as submergence aggregate;
- submergence aggregate mass measuring means for measuring a mass of the submergence aggregate in said plurality of measurement containers;
- and
- water level maintaining means for maintaining a water level of the submergence aggregate in said plurality of measurement containers at a normal water level where the depth is identical,
- wherein a bottom lid capable of maintaining watertightness inside each of said plurality of measurement containers is attached at a bottom opening of each of said plurality of measurement containers in such a way that the bottom lid is free to open or close and volumes of said plurality of measurement containers differ from each other at said normal water level;
- and
- wherein a measurement container is selected for measurement out of said plurality of measurement containers according to a required mass of aggregate.
6 more elements
A measuring apparatus of concrete materials, comprising:
- an aggregate measurement container for storing aggregate to be measured;
- aggregate mass measuring means for measuring amass of the aggregate in said aggregate measurement container;
- a plurality of measurement containers for containing aggregate in said aggregate measurement container together with water as submergence aggregate;
- water level maintaining means for maintaining a water level of the submergence aggregate in said plurality of measurement containers at a normal water level where the depth is identical;
- and
- supplied or discharged water mass measuring means for measuring mass of water supplied to or discharged from said plurality of measurement containers as accumulation values,
- wherein a bottom lid capable of maintaining watertightness inside each of said plurality of measurement containers is attached at a bottom opening of each of said plurality of measurement containers in such a way that the bottom lid is free to open or close and volumes of said plurality of measurement containers differ from each other;
- and
- wherein a measurement container is selected for measurement out of said plurality of measurement containers according to a required mass of aggregate.
6 more elements
Dependencies are inferred from the claim text.