NMR concrete analysis
AssigneeNumalog
InventorsMelvin N. Miller, Manfred G. Prammer, Moti Huber
Life of this patent
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Abstract
A method for measuring or predicting a property of a porous material while curing, the porous material including therein a liquid which undergoes metamorphosis and which is present in the porous material in different phases during curing, the method including the steps of performing a low frequency, spin-echo nuclear magnetic resonance (NMR) measurement of each phase of the liquid, and correlating the NMR measurement, or extrapolating the property, in accordance with a predetermined relationship between the property and the NMR measurement.
Claims17
A method for measuring a property of a porous material while curing, said porous material including therein a liquid which undergoes metamorphosis and which is present in said porous material in different phases during curing, said method comprising the steps of:
- performing a low frequency, spin-echo nuclear magnetic resonance (NMR) measurement of each phase of said liquid;
- and
- correlating said NMR measurement with a predetermined relationship between said property and said NMR measurement.
A method for predicting a property of a porous material while curing, said porous material including therein a liquid which undergoes metamorphosis and which is present in said porous material in different phases during curing, said method comprising the steps of:
- performing a low frequency, spin-echo nuclear magnetic resonance (NMR) measurement of each phase of said liquid;
- and
- extrapolating said property based on a predetermined relationship between said property and said NMR measurement.
A method for measuring a property of a structure made of concrete, the concrete including therein free water, capillary bound water and chemically bound water, said method comprising the steps of:
- performing an in situ, low frequency, spin-echo nuclear magnetic resonance (NMR) measurement of said free water, said capillary bound water and said chemically bound water;
- and
- correlating said NMR measurement with a predetermined relationship between said property and said NMR measurement.
A method for predicting a property of a structure made of concrete, the concrete including therein free water, capillary bound water and chemically bound water, said method comprising the steps of:
- performing an in situ, low frequency, spin-echo nuclear magnetic resonance (NMR) measurement of said free water, said capillary bound water and said chemically bound water;
- and
- extrapolating said property based on a predetermined relationship between said property and said NMR measurement.
Apparatus for measuring a property of a structure made of concrete, the concrete including therein free water, capillary bound water and chemically bound water, said apparatus comprising:
- at least one magnet for generating a magnetic field;
- a radio frequency (RF) transmitter:
- a butterfly-type surface coil electrically connected to said RF transmitter for generating RF signals;
- and
- an RF shield for substantially isolating said at least one magnet and said coil from environmental noise, wherein said apparatus creates a sensitive volume in said concrete structure for performing therein an in situ, low frequency, spin-echo nuclear magnetic resonance (NMR) measurement of said free water, said capillary bound water and said chemically bound water in said concrete.
Dependencies are inferred from the claim text.