CORRELATION BETWEEN 28-DAY AND 6-HOUR COMPRESSIVE STRENGTHS

Abstract Using commercially batched ready-mix concrete, a linear relationship was established for compressive strengths at 28 days (wet-cured) and 6 h (microwave-cured), log f 28-day =1.31+0.35log f 6-h . The relationship is important because the impact of concrete mix adjustments is quickly appreciated, reducing the frequency and financial severity of rework or litigation.