Abstract：The one-single and multi-level gradient test were selected to investigate the influence of feldspathic stone on the physical properties of Portland cement and sulphoaluminate cement, with the comparison of different feldspathic stone substitution, setting time, standard consistency water consumption and mechanical performance of Portland cement and sulphoaluminate cement were tested. The results show that the certain amount of feldspathic stone shortens the setting time of Portland cement and sulphoaluminate cement. The initial setting time of Portland cement and sulphoaluminate cement are shortened by 30% and 47%, and the water requirement for normal consistency of Portland cement and sulphoaluminate cement are increased by 6.6% and 21.7%, separately, when the substitution of feldspathic stone powders is 5%. Mechanical performance of Portland cement is positive with 10% mass fraction substitution of feldspathic stone, and the compressive strength of 3 d and 28 d are increased by 7.2% and 6%, respectively. The compressive strength of sulphoaluminate cement is decreased with the increasing of feldspathic stone.

Keywords: Portland cement; sulphoaluminate cement; fly ash; feldspathic stone