Effect of Early-strength Admixture on Pozzolanic Reaction of Calcined Coal Gangue

摘要

This paper studies the strength, the composition, the content of Ca (OH)_2 , and the consumption of Ca(OH)_2 in pozzolanic reaction in the system of calcined coal gangue-Ca (OH)_2-H_2O by using macro mechanical test, X-ray diffraction (XRD) , and Differential Scanning Calorimetry (DSC).The results show that early-strength admixture Na_2SO_4 and CaCl_2·2H_2O can accelerate the pozzolanic reaction of calcined coal gangue. The effect of Na_2SO_4 is superior to that of CaCl_2·2H_2O and its appropriate content is 4%.