粉煤灰基矿物聚合物的强度影响因素研究  

Investigation on the Affecting Factors of the Strengths of Geopolymer Based on Fly Ash

作　　者：孟丽峰[1] 郑娟荣[1] 

机构地区：[1]郑州大学土木工程学院,郑州450002

出　　处：《硅酸盐通报》2010年第3期542-546,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(No.50572096)资助项目

摘　　要：通过实验研究了粉煤灰基矿物聚合物的水胶比、胶砂比、养护制度、水玻璃模数、碱性激发剂中NaOH的百分含量等因素对强度的影响,找出了最佳配合比及养护制度,并对其原因进行了机理分析。结果表明粉煤灰基矿物聚合物的最佳配合比及养护制度为:水胶比为0.4,胶砂比为1∶3,碱性激发剂中的NaOH含量为20%～24%,水玻璃的模数为1.4时抗压强度最高达到48.4MPa;高温养护前,试块在室温条件下静置24h有利于强度的发展;高温养护的时间并非越长强度越高,65℃高温养护最佳时间为48h,48h以后强度增长缓慢。Investigation on the factors of the water/binder ratio,binder/sand ratio,curing regime,modulus and the percentage of sodium hydroxide in alkaline silicate of geopolymer based on fly ash were carried out in this paper.Also,the optional mixing proportion and curing regime were obtained.Finally,the causes and mechanism were analyzed.The results indicated that the ratio of water to binder and binder to sand were 0.4 and 1∶3 respectively;the optional content range of sodium hydroxide in alkaline silicate activator was from 20% to 24%;the compressive strength reached to 48.4 MPa when the modulus was 1.4;the specimens were cured in room temperature for 24 h was beneficial to the development of strength before the specimens were heated;in order to get the max compressive strength,the specimens should be heated 48 h in the temperature of 65 ℃ because the increasing tendency of strength were slow after 48 h.

关 键 词：粉煤灰 矿物聚合物 影响因素 配合比 

分 类 号：TB321[一般工业技术—材料科学与工程]