The effects of sodium aluminate(SA),superplasticizer(Sp)and super-absorbent polymer(SAP)on strength and hydration characteristics of hardened cement paste from the view of pore structure were investigated to reveal the correlation between microstructure of hardened cement paste and their macroscopic properties.The results show that the maximum exothermic peak is significantly enhanced in acceleration period of cement hydration.Depending on dissolution-precipitation of SA,dispersion of Sp and function of SAP...