【作者】 刘贤萍； 王培铭；

【Author】 LIU Xianping,WANG Peiming(Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,School of Materials Science and Engineering,Tongji University,Shanghai 200092,China)

【机构】 先进土木工程材料教育部重点实验室,同济大学材料科学与工程学院；

【摘要】 研究了0、20、40、60℃四种养护温度下煤矸石/粉煤灰硅酸盐水泥净浆抗压强度的发展,并用化学结合水、热分析研究了其水化进程,建立了抗压强度与水化进程的关系。结果表明,养护温度越低,早期强度越低,但后期强度增长较快。升高养护温度有利于促进混合材的火山灰反应,提高体系的整体水化程度,其对粉煤灰硅酸盐水泥的影响大于对煤矸石硅酸盐水泥的影响。养护温度低于40℃,抗压强度主要决定于水泥的水化程度。更多还原

【Abstract】 Compressive strength development and hydration process of Portland cement blended with coal gangue or fly ash at 0、20、40、60℃ have been studied by mechanical testing,nonevaporable water and thermal analysis.Results show that the lower curing temperature,the lower early compressive strength of hardened cement paste is,but the later compressive strength increases faster.Elevation of curing temperature accelerates pozzuolanic reaction of mineral additions and hence increases the hydration degree of cement.The effect on Portland fly ash cement is greater than on Portland coal gangue cement.Compressive strength is determined mainly by hydration degree when curing temperature is below 40℃.更多还原