The concrete maturity method is a quality control/quality assurance tool that can be used to assist contractors and transportation officials in producing cost-efficient, durable concrete structures. This report documents the findings of an investigation performed for the Oregon Department of Transportation to demonstrate the use and benefits of the maturity method. The maturity method was shown to be an easily implemented QC/QA tool that can be used to estimate strength development, speed construction operations, and document contractor mistakes. 17. Key Words Concrete, maturity method, quality control, quality assurance, strength estimation, strength-maturity correlatio
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