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US 5,527,387 AGranted
Computer implemented processes for microstructurally engineering cementious mixtures
AssigneeE. Khashoggi Industries
InventorsPer J. Andersen, Simon K. Hodson
Life of this patent
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Abstract
A design optimization process used to determine the proportions of sand, cement, coarse aggregate, water, fly ash, water reducers, air entraining agents and fillers needed to produce a concrete mixture that has desired strength and slump properties and a minimal cost. The optimization process comprises a combination of models that accurately reflect the properties of a concrete mixture based on the properties of its individual components. The process is further capable of optimizing the durability of the cementitious mixture and of accurately calculating the expected yield of the mixture.
Claims38
A method for designing a cementitious mixture by means of a computer-implemented design optimization process without trial and error testing of a final hydrated cementitious mixture, the method comprising the steps of:
- (a) providing a batch of hydraulic cement and a batch of aggregate to be mixed together to form a final hydrated cementitious mixture, the batch of hydraulic cement including a plurality of individual particles having an average diameter particle size and a particle packing density and the batch of aggregate including a plurality of individual particles having an average diameter particle size and a particle packing density;
- (b) selecting a target slump for the final hydrated cementitious mixture prior to hardening and a target strength for the final hydrated cementitious mixture after curing and thereafter inputting to a central processing unit (CPU) the target slump and target strength;
- (c) measuring the average diameter particle size of the individual particles in the batch of hydraulic cement and thereafter inputting to the CPU the average diameter particle size of the individual particles in the batch of hydraulic cement;
- (d) measuring the particle packing density of the batch of hydraulic cement and thereafter inputting to the CPU the particle packing density of the batch of hydraulic cement;
- (e) measuring the average diameter particle size of the individual particles in the batch of aggregate and thereafter inputting to the CPU the average diameter particle size of the individual particles in the batch of aggregate;
- (f) measuring the particle packing density of the batch of aggregate and thereafter inputting to the CPU the particle packing density of the batch of aggregate;
- (g) designing a dry cementitious mixture from the batch of hydraulic cement and batch of aggregate, the dry cementitious mixture having a concentration ratio of hydraulic cement and aggregate, and thereafter inputting to the CPU the concentration ratio of hydraulic cement and aggregate in the dry cementitious mixture;
- (h) the CPU calculating the particle packing density of the designed dry cementitious mixture based on:
- (1) the average diameter particle size of the individual particles in the batch of hydraulic cement;
- (2) the particle packing density of the batch of hydraulic cement;
- (3) the average diameter particle size of the individual particles in the batch of aggregate;
- (4) the particle packing density of the batch of aggregate;
- and
- (5) the concentration ratio of hydraulic cement and aggregate in the designed dry cementitious mixture;
- (i) the CPU calculating, based on the particle packing density of the designed dry cementitious mixture, an amount of water that when mixed with the designed dry cementitious mixture yields a designed hydrated cementitious mixture having the target slump;
- (j) the CPU calculating, based on the amount of water calculated in step (i), a calculated strength for the designed hydrated cementitious mixture after curing;
- (k) the CPU calculating the difference between the calculated strength for the designed hydrated cementitious mixture after curing and the target strength;
- and
- (l) the CPU altering the concentration ratio of hydraulic cement and aggregate in the designed dry cementitious mixture in order to design one or more subsequently designed dry cementitious mixtures and then repeating steps (h)-(k) for each of the one or more subsequently designed dry cementitious mixtures in order to identify one or more optimally designed hydrated cementitious mixtures having a strength after curing within an acceptable range of deviation with respect to the target strength.
16 more elements
A method for designing a cementitious mixture by means of a computer-implemented design optimization process without trial and error testing of a final hydrated cementitious mixture, the method comprising the steps of:
- (a) providing a batch of hydraulic cement, a batch of fine aggregate, and a batch of coarse aggregate to be mixed together in selected proportions to form a final hydrated cementitious mixture, the batch of hydraulic cement including a plurality of individual particles having an average diameter particle size and a particle packing density, the batch of fine aggregate including a plurality of individual particles having an average diameter particle size and a particle packing density, and the batch of coarse aggregate including a plurality of individual particles having an average diameter particle size and a particle packing density,
- (b) selecting a target slump for the final hydrated cementitious mixture prior to hardening and a target strength for the final hydrated cementitious mixture after curing and thereafter inputting to a central processing unit (CPU) the target slump and target strength;
- (c) measuring the average diameter particle size of the individual particles in the batch of hydraulic cement and thereafter inputting to the CPU the average diameter particle size of the individual particles in the batch of hydraulic cement;
- (d) measuring the particle packing density of the batch of hydraulic cement and thereafter inputting to the CPU the particle packing density of the batch of hydraulic cement;
- (e) measuring the average diameter particle size of the individual particles in the batch of fine aggregate and thereafter inputting to the CPU the average diameter particle size of the individual particles in the batch of fine aggregate;
- (f) measuring the particle packing density of the batch of fine aggregate and thereafter inputting to the CPU the particle packing density of the batch of fine aggregate;
- (g) measuring the average diameter particle size of the individual particles in the batch of coarse aggregate and thereafter inputting to the CPU the average diameter particle size of the individual particles in the batch of coarse aggregate;
- (h) measuring the particle packing density of the batch of coarse aggregate and thereafter inputting to the CPU the particle packing density of the batch of coarse aggregate;
- (i) designing a dry cementitious mixture from the batch of hydraulic cement, the batch of fine aggregate, and the batch of coarse aggregate, the dry cementitious mixture having a concentration ratio of hydraulic cement, fine aggregate, and coarse aggregate, and thereafter inputting to the CPU the concentration ratio of hydraulic cement, fine aggregate, and coarse aggregate in the dry cementitious mixture;
- (j) the CPU calculating the particle packing density of the designed dry cementitious mixture based on:
- (1) the average diameter particle size of the individual particles in the batch of hydraulic cement;
- (2) the particle packing density of the batch of hydraulic cement;
- (3) the average diameter particle size of the individual particles in the batch of fine aggregate;
- (4) the particle packing density of the batch of fine aggregate;
- (5) the average diameter particle size of the individual particles in the batch of coarse aggregate;
- (6) the particle packing density of the batch of coarse aggregate;
- and
- (7) the concentration ratio of hydraulic cement, fine aggregate, and coarse aggregate in the dry cementitious mixture;
- (k) the CPU calculating, based on the particle packing density of the designed dry cementitious mixture, an amount of water that when mixed with the designed dry cementitious mixture yields a designed hydrated cementitious mixture having the target slump;
- (l) the CPU calculating, based on the amount of water calculated in step (k), a calculated strength for the designed hydrated cementitious mixture after curing;
- (m) the CPU calculating the difference between the calculated strength for the designed hydrated cementitious mixture after curing and the target strength;
- and
- (n) the CPU altering the concentration ratio of hydraulic cement, fine aggregate, and coarse aggregate in the designed dry cementitious mixture in order to design one or more subsequently designed dry cementitious mixtures and then repeating steps (j)-(m) for each of the one or more subsequently designed dry cementitious mixtures in order to identify one or more optimally designed hydrated cementitious mixture having a strength after curing within an acceptable range of deviation with respect to the target strength.
20 more elements
A method for manufacturing a final dry cementitious mixture without trial and error testing of a final hydrated cementitious mixture by means of a computer-implemented design optimization process, the method comprising the steps of:
- (a) providing a batch of hydraulic cement and a batch of aggregate to be mixed together to form the final dry cementitious mixture, the batch of hydraulic cement including a plurality of individual particles having an average diameter particle size and a particle packing density and the batch of aggregate including a plurality of individual particles having an average diameter particle size and a particle packing density;
- (b) selecting a target slump for the final hydrated cementitious mixture prior to hardening and a target strength for the final hydrated cementitious mixture after curing and thereafter inputting to a central processing unit (CPU) the target slump and target strength;
- (c) measuring the average diameter particle size of the individual particles in the batch of hydraulic cement and thereafter inputting to the CPU the average diameter particle size of the individual particles in the batch of hydraulic cement;
- (d) measuring the particle packing density of the batch of hydraulic cement and thereafter inputting to the CPU the particle packing density of the batch of hydraulic cement;
- (e) measuring the average diameter particle size of the individual particles in the batch of aggregate and thereafter inputting to the CPU the average diameter particle size of the individual particles in the batch of aggregate;
- (f) measuring the particle packing density of the batch of aggregate and thereafter inputting to the CPU the particle packing density of the batch of aggregate;
- (g) designing a dry cementitious mixture from the batch of hydraulic cement and the batch of aggregate, the designed dry cementitious mixture having a concentration ratio of hydraulic cement and aggregate, and thereafter inputting to the CPU the concentration ratio of hydraulic cement and aggregate in the designed dry cementitious mixture;
- (h) the CPU calculating the particle packing density of the designed dry cementitious mixture based on:
- (1) the average diameter particle size of the individual particles in the batch of hydraulic cement;
- (2) the particle packing density of the batch of hydraulic cement;
- (3) the average diameter particle size of the individual particles in the batch of aggregate;
- (4) the particle packing density of the batch of aggregate;
- and
- (5) the concentration ratio of hydraulic cement and aggregate in the designed dry cementitious mixture;
- (i) the CPU calculating, based on the particle packing density of the designed dry cementitious mixture, an amount of water that when mixed with the designed dry cementitious mixture yields a designed hydrated cementitious mixture having the target slump;
- (j) the CPU calculating, based on the amount of water calculated in step (i), a calculated strength for the designed hydrated cementitious mixture after curing;
- (k) the CPU calculating the difference between the calculated strength for the designed hydrated cementitious mixture after curing and the target strength;
- and
- (l) the CPU altering the concentration ratio of hydraulic cement and aggregate in the designed dry cementitious mixture in order to design one or more subsequently designed dry cementitious mixtures and then repeating steps (h)-(k) for each of the one or more subsequently designed dry cementitious mixtures in order to identify one or more optimally designed hydrated cementitious mixtures having a strength after curing within an acceptable range of deviation with respect to the target strength;
- and
- (m) mixing together at least a portion of the batch of hydraulic cement and of the batch of aggregate in order to yield the final dry cementitious mixture in which the concentration ratio of the hydraulic cement and aggregate is substantially similar to the concentration ratio of hydraulic cement and aggregate in at least one of the one or more optimally designed hydrated cementitious mixtures identified in step (l).
18 more elements
A method for manufacturing a final cementitious mixture without trial and error testing of the final hydrated cementitious mixture by means of a computer-implemented design optimization process, the method comprising the steps of:
- (a) providing a batch of hydraulic cement and a batch of aggregate to be mixed together to form the final hydrated cementitious mixture, the batch of hydraulic cement including a plurality of individual particles having an average diameter particle size and a particle packing density and the batch of aggregate including a plurality of individual particles having an average diameter particle size and a particle packing density;
- (b) selecting a target slump for the final hydrated cementitious mixture prior to hardening and a target strength for the final hydrated cementitious mixture after curing and thereafter inputting to a central processing unit (CPU) the target slump and target strength;
- (c) measuring the average diameter particle size of the individual particles in the batch of hydraulic cement and thereafter inputting to the CPU the average diameter particle size of the individual particles in the batch of hydraulic cement;
- (d) measuring the particle packing density of the batch of hydraulic cement and thereafter inputting to the CPU the particle packing density of the batch of hydraulic cement;
- (e) measuring the average diameter particle size of the individual particles in the batch of aggregate and thereafter inputting to the CPU the average diameter particle size of the individual particles in the batch of aggregate;
- (f) measuring the particle packing density of the batch of aggregate and thereafter inputting to the CPU the particle packing density of the batch of aggregate;
- (g) designing a dry cementitious mixture from the batch of hydraulic cement and batch of aggregate, the designed dry cementitious mixture having a concentration ratio of hydraulic cement and aggregate, and thereafter inputting to the CPU the concentration ratio of hydraulic cement and aggregate in the designed dry cementitious mixture;
- (h) the CPU calculating the particle packing density of the designed dry cementitious mixture based on:
- (1) the average diameter particle size of the individual particles in the batch of hydraulic cement;
- (2) the particle packing density of the batch of hydraulic cement;
- (3) the average diameter particle size of the individual particles in the batch of aggregate;
- (4) the particle packing density of the batch of aggregate;
- and
- (5) the concentration ratio of hydraulic cement and aggregate in the designed dry cementitious mixture;
- (i) the CPU calculating, based on the particle packing density of the designed dry cementitious mixture, an amount of water that when mixed with the designed dry cementitious mixture yields a designed hydrated cementitious mixture having the target slump;
- (j) the CPU calculating, based on the amount of water calculated in step (i), a calculated strength for the designed hydrated cementitious mixture after curing;
- (k) the CPU calculating the difference between the calculated strength for the designed hydrated cementitious mixture after curing and the target strength;
- and
- (l) the CPU altering the concentration ratio of hydraulic cement and aggregate in the designed dry cementitious mixture in order to design one or more subsequently designed dry cementitious mixtures and then repeating steps (h)-(k) for each of the one or more subsequently designed dry cementitious mixtures in order to identify one or more optimally designed hydrated cementitious mixtures having a strength after curing within an acceptable range of deviation with respect to the target strength;
- and
- (m) mixing together water, at least a portion of the batch of hydraulic cement, and at least a portion of the batch of aggregate in order to yield the final hydrated cementitious mixture in which the concentration ratio of the hydraulic cement and aggregate is substantially similar to the concentration ratio of hydraulic cement and aggregate in at least one of the one or more optimally designed hydrated cementitious mixtures identified in step (l).
18 more elements
Dependencies are inferred from the claim text.