双膨胀源层面材料力学特性及微观结构研究  

Study on Mechanical Properties and Microstructure of Double Expansion Source Material

作　　者：祝小靓[1,2] 傅琼华 高江林[1,2] 龚英 徐晶晶[1] ZHU Xiaoliang;FU Qionghua;GAO Jianglin;GONG Ying;XU Jingjing(Jiangxi Provincial Institute of Water Science,Nanchang 330029,Jiangxi,China;Jiangxi Provincial Research Center of Hydraulic Structures,Nanchang 330029,Jiangxi,China)

机构地区：[1]江西省水利科学研究院,江西南昌330029 [2]江西省水工安全工程技术研究中心,江西南昌330029

出　　处：《水力发电》2018年第12期117-120,共4页Water Power

基　　金：国家重点研发计划项目(2016YFC0401603);中国电力建设股份有限公司科技项目(DJ-ZDXM-2017-03);江西省水利厅科技项目(KT201606;201820YBKT10);水利部鄱阳湖水资源水生态环境研究开放基金项目(ZXKT201702)

摘　　要：碾压混凝土坝层面结合质量问题一直以来备受工程技术人员的关心,随着近年来筑坝高度地不断提高,层面问题将更为突出。针对该问题,从材料角度出发,通过掺入一定量的硅粉和不同掺量的硫铝酸钙-氧化钙类双膨胀源膨胀剂,从宏观性能和微观结构两方面对碾压混凝土层面材料进行了研究分析。结果表明:膨胀剂对于层面材料的早期柔韧性有改善作用,硅粉和膨胀剂复掺可以降低水化产物的钙硅比,但膨胀剂的掺量存在最优值,当膨胀剂掺量为8%时,材料的微观结构最密实。The interface quality problem of roller compacted concrete dam has always been concerned by engineers and technicians.With the continuous increase of dam height in recent years,the problem of interface quality will be more prominent.In view of this problem,the RCC interface material is studied from two aspects of macro performance and microstructure by adding a certain amount of silicon powder and different content of calcium sulphoaluminate and calcium oxide double expansion agent.The results show that the expansion agent can improve the early flexibility of material,and the silica powder and the expansion agent can reduce the calcium and silicon ratio of hydration products,but the dosage of the expander has an optimal value.When the volume of the expander is 8%,the microstructure of material is the densest.

关 键 词：双膨胀源 层面材料 力学特性 微观结构 

分 类 号：TU528[建筑科学—建筑技术科学]