STUDY ON THE RESTRICTED EXPANSION RATE OF EXPANSION AGENT USING ORTHOGONAL DESIGN METHOD

摘要

This paper deals with the influence effect of W/C ratio, curing condition and mineral admixtures to restricted expansion rate of expansion agent using orthogonal design method. The results show that the abundance of curing water is directly related to the expansive effect of shrinkage-compensating concrete. Mineral admixtures, such as fly ash and slag, can notably reduce the early expansive efficiency of expansion agent. The influence of curing temperature on restricted expansion rate is weak in early age, but strong in subsequent period. The influence of W/B ratio is weak comparing to other influencing factors.