International Society for Concrete Pavements: “Maturity Method” for In-Place Concrete Strength: What Is It, How Is It Measured, & Why Validate It?

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Published on the International Society for Concrete Pavements website in July 2019.

Maturity has been used for over 50 years. In the 1970s, a string of fatal construction disasters occurred killing over 65 workers and injuring dozens. Although they waited days for the concrete to cure after being poured, the concrete had not yet gained sufficient strength and the buildings collapsed. This motivated engineers and researchers to refine the technique for routine construction. At the time, a reliable method allowing construction teams to estimate the in-place strength of concrete was not readily available.

In 1987, ASTM C 1074 was the first specification to apply the maturity method. Construction teams now have an approved procedure for reliably estimating in-place concrete strength. Researchers found that the maturity method can account for the temperature differences between the laboratory specimens and in-place concrete structures. Implementing the maturity method helps construction teams know when their concrete has reached adequate strength, sequence construction operations, and build concrete products safely and cost-efficiently.

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