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Over the next 50 years, I see a move toward higher quality concrete led by implementation of the 10-to 12-year FHWA Concrete Pavement Road Map research, starting with its “Performance-Based Concrete Pavement Mix Design System.”
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Using fixed weights of variable ingredients under variable conditions yields a predictable result - a variable product. To avoid problems caused by keeping ingredient weights constant, concrete should be produced to meet performance requirements in accordance with a design formula for the composite...
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The slump test is a commonly used tool for quality control of fresh concrete at the jobsite and for enforcement of specifications. It has limitations however, that should be recognized. Unfortunately, slump does not describe the properties of workability, pumpability, and finishability that are so...
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