TEKNIK DERGI, vol.19, no.4, pp.4539-4544, 2008 (SCI-Expanded)
Microwave energy can accelerate hydration of cement, which results in rapid strength development of concrete. In this paper, prediction of 7 and 28 day standard compressive strength of fly ash cement mortars, based on the accelerated strength of mortars cured with microwave energy was investigated. To accelerate curing properly, optimal processing parameters of microwave curing (MC) on Portland cement mortars (CM) and fly ash cement mortars (FA) were first determined. The possible early ages for the strength prediction were found to be at 6 and 8 h for CM and FA, respectively. The error percentages for prediction of CM were +/- 2.22% and 2.91% for 7 and 28 days respectively. Error percentages for FA, on the other hand, were +/- 4.36% and 5.20% for 7 and 28 days.