碱激发剂对粉煤灰加气混凝土性能的影响  

Effect of Alkali-activator on Performance of Fly Ash Aerated Concrete

作　　者：周卫兵[1] 孙正[1] 朱教群[1] 朱惠英 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]广西建筑科学研究设计院,广西南宁530011

出　　处：《粉煤灰综合利用》2014年第1期3-4,8,共3页Fly Ash Comprehensive Utilization

基　　金：国家科技支撑计划(2011BAJ01B04);广西科学研究与技术开发计划项目(桂科攻12118014-3B)

摘　　要：采用Na2SiO3作碱激发剂提高加气混凝土中粉煤灰的活性,比较激发前后加气混凝土物理性能的变化。通过XRD和SEM方法研究水化产物的物相组成和显微形貌。结果表明:Na2SiO3能够显著提高加气混凝土的抗压强度;激发后,粉煤灰加气混凝土物相中可见较多托贝莫来石,水化产物均匀分布相互胶结,形成更为致密结构。The Na2 SiO3 as alkali-activator was added to improve the activity of fly ash in aerated concrete paste, and to compare with the physical property change of aerated concrete before and after activation. Phase composition and microstructure morphology of hydration products were also studied by XRD and SEM methods. The results show that the Na2 SiO3 can significantly improve the compressive strength of aerated concrete. After alkali activated effect, more tobermorite can be observed in fly ash aerated concrete hydration products. These products cross each other, form-ing a more compact structure.

关 键 词：NA2SIO3 粉煤灰 加气混凝土 NA2 SiO3 

分 类 号：TU528.2[建筑科学—建筑技术科学]