高掺氧化镁混凝土在某水电站拱坝工程中的应用  

Application of concrete with high content of MgO in arch dam of hydropower station

作　　者：陈昌礼[1] 赵其兴 李维维[1] 王兴德 徐普[3] 颜少连 

机构地区：[1]贵州师范大学材料与建筑工程学院,贵州贵阳550025 [2]贵州中水建设管理股份有限公司,贵州贵阳550002 [3]贵州省大坝安全监测中心,贵州贵阳550002 [4]贵州水利科学研究院,贵州贵阳550002

出　　处：《水利水电科技进展》2016年第6期64-68,共5页Advances in Science and Technology of Water Resources

基　　金：贵州省教育厅"125"重大科技专项([2012]004);国家自然科学基金(51269003;50969002)

摘　　要：为了充分发挥MgO混凝土筑坝技术的优越性,针对某Ⅳ等小(1)型水电站混凝土拱坝工程,依据压蒸原理,进行水泥-粉煤灰-石粉混合浆体试件压蒸试验,据此将MgO的掺量提高到6.5%,并应用于水电站混凝土拱坝工程。结果表明,高掺MgO混凝土进一步提高了坝体混凝土的抗裂能力,简化了大体积混凝土的温控措施,实现了仅设极少诱导缝、不设纵缝、通仓浇筑坝体的混凝土坝体浇筑方式。In order to demonstrate the superiority of using MgO-mixed concrete in dam construction,autoclave tests of cement-fly ash-stone dust mixed paste specimens were conducted according to the autoclave principle,and the mixing ratio of MgO in the specimens was increased to 6. 5%. This technology was applied to the concrete arch dam of a grade IV smallscale( type 1) hydropower station. The results show that concrete with a high content of MgO can improve the anti-cracking performance of the dam concrete and simplify temperature control measurements of mass concrete,allowing for an improved concrete dam construction method,in which few induced joints are needed,longitudinal joints can be cancelled,and entire concrete blocks of the dam body can be poured.

关 键 词：MGO混凝土 压蒸试验 安定掺量 自生体积变形 换坝 

分 类 号：TV431[水利工程—水工结构工程]