Some Effects on Datum Temperature for Maturity Application on Fly Ash Concrete

Abstract

This paper reports the effects of water binder ratio (w/b), curing temperature and fly ash content on datum temperature for maturity applications on fly ash concrete. This chosen temperature is used to predict the potential characteristics of fly ash concrete within a short time after placing for quality control purpose. It was found that these factors strongly and differently affected the datum temperature of fly ash concrete with different workability. From the three chosen curing temperatures, 26, 40 and 60^oC, the datum temperature of no slump roller compacted concrete was -3.2^oC, while those of normal slump fly ash concrete appeared to be higher. The w/b ratios of 0.40-0.45 and fly ash content of 20-30% yielded a small difference in datum temperature while the higher w/b and higher fly ash content resulted in higher datum temperature. However, the latter was derived from the limited available data and further investigations were suggested.