Concrete Paving Quality Control Procedures: Water-Cementitious Materials Ratio (Microwave)

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The water-cementitious materials (w/cm) ratio has a significant effect on the strength and permeability of a pavement.

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Acceptance strength tests on hardened concrete are normally performed at least seven days after placement of the concrete. The microwave method can be used to obtain w/cm ratio results within hours, instead of waiting days for strength results. Monitoring the test results may provide an early flag of potentially low-strength concrete, allowing the contractor to adjust operations sooner than conventional strength testing might indicate. Concrete strength varies inversely with the amount of water in the mixture. In simplest terms, for a given cementitious content, less water leads to higher strength. Other factors, such as consolidation, curing, aggregate quality, air content, and aggregate shape, affect strength as well. For a given mixture with a constant amount of cement, the w/cm ratio has the greatest impact on strength. The Concrete Paving Quality Control Procedures: Water-Cementitious Materials Ratio (Microwave) mobile app covers: Purpose, Principle, Test Procedure, Test Method, Output and Construction Issues. See the Savings Possible with GoCanvas!

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