粉煤灰水泥早期水化的原位观察  

In-situ Observation of Hydration of Fly Ash Cement at Early Age

作　　者：陈登 邓敏[2] CHEN Deng;DENG Min(College of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011 [2]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《材料科学与工程学报》2020年第4期541-546,共6页Journal of Materials Science and Engineering

基　　金：The CRSRI Open Research Program(CKWV2019757/KY);The Open Research Program of Guang Xi Key Laboratory of New Energy and Building Energy Saving(19-J-22-1).

摘　　要：将粉煤灰水泥制成尺寸为35 mm×25 mm×25 mm的压实体,采用激光共聚焦显微镜对粉煤灰水泥压实体的早期水化过程进行原位观察。结果表明:激光共聚焦显微镜可以较好地应用于原位观察粉煤灰水泥压实体的水化过程以及孔的演变过程。当粉煤灰水泥压实体与水接触8h时,水化产物围绕着水泥颗粒大量生成。随着水化时间的延长,水化产物生成量逐渐增多,水泥颗粒与粉煤灰颗粒之间的大量孔洞被水化产物填充。水化3d时,粉煤灰水泥水化达到稳定期,微结构逐渐密实。The fly ash cement compact with the size of 35 mm×25 mm×25 mm was prepared.The early hydration of fly ash cement compact in situ was investigated by laser scanning confocal microscopy(LSCM).The results show that LSCM is helpful in in-situ investigating the hydration and the pore evolution of fly ash cement compact.Hydration products are formed around cement particles when fly ash cement compact contacted with water for 8 h.With increasing hydration time,the quantity of hydration products increases,most of the space between cement particles and fly ash particles is filled by hydration products.After 3 d hydration,the microstructure of hydrated compact become denser,and the microstructure evolution of the fly ash cement compact slows down.

关 键 词：粉煤灰水泥压实体 原位观察 水化 孔 

分 类 号：TQ172.11[化学工程—水泥工业]