Lessons Learned in Laboratory and Field Evaluation of Accelerated Strength Tests for Quality Control of Concrete Pavements

by Jeffrey P. Armstrong, US Army Engineer Waterways, Experiment Station, United States,

Abstract: This paper describes the results of an accelerated strength testing program performed to evaluate flexural strength potential at 28- and 90-days. Based upon a literature review of previous work, an accelerated curing method similar to ASTM C 684, Procedure A (warm water method used for accelerated compressive strength), was identified as having the most promise. A comprehensive laboratory study was performed using mixture proportions with three different water cement ratios for a broad range of concrete strengths. The warm water curing method was applied to flexural, splitting tensile, and compressive strength specimens by using a water trough and industrial water heater with a circulating pump in a constant temperature room.

Subject Headings: Flexural strength | Compressive strength | Water circulation | Curing | Water management | Laboratory tests | Ultimate strength

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