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- 混凝土与制品
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水分蒸发抑制剂对乌东德水电站混凝土强度的影
作者：鹿永久1，王瑞2，3，王伟2，3，李明2，3，李磊2，3
（1.中国长江三峡集团公司试验中心乌东德工程分中心，湖北 宜昌 443133；
2.高性能土木工程材料国家重点实验室，江苏省建筑科学研究院有限公司，江苏 南京 210008；
3.江苏苏博特新材料股份有限公司，江苏 南京 211103）
摘要：研究了水分蒸发抑制剂对乌东德水电站工程四级配大坝混凝土水分蒸发抑制率及强度的影响。结果表明，水分蒸发抑制剂具有显著的水分蒸发抑制效果，2 h水分蒸发抑制率为62.3%；随着分层浇筑间隔时间的延长，混凝土抗压强度和劈裂抗拉强度逐渐降低；喷洒水分蒸发抑制剂对混凝土抗压强度和劈裂抗拉强度无负面影响，由于其水分蒸发抑制作用，强度甚至表现出一定程度的提高；相同分层浇筑时间间隔条件下，喷洒水分蒸发抑制剂对四级配大坝混凝土抗剪断强度无影响。
关键词：水分蒸发抑制剂；四级配混凝土；水分蒸发；强度
中图分类号：TU528.36 文献标识码：A 文章编号：1001-702X（2018）10-0008-04
Study on the influence of water evaporation inhibitor on concrete strength of Wudongde Hydropower Station
LU Yongjiu1，WANG Rui2，3，WANG Wei2，3，LI Ming2，3，LI Lei2，3
（1.China Three Gorges Corporation Test Center Wudongde Engineering Center，Yichang 443133，China；
2.State Key Laboratory of High Performance Civil Engineering Materials，Jiangsu Research Institute of Building Science，
Nanjing 210008，China；3.Jiangsu Sobute New Materials Co. Ltd.，Nanjing 211103，China）
Abstract：The effect of evaporation retardants on the water evaporation rate and strength of four-graded concrete in Wudongde Hydropower Station was studied. The results show that the evaporation retardants has a significant inhibitory effect of water evaporation，and the water evaporation inhibition rate of 2 h can reach 62.3%. With the extension of layered casting time interval，the concrete compressive strength and splitting tensile strength are gradually reduced，and the spray evaporation retardants has no negative impact on compressive strength and splitting tensile strength and due to its water evaporation inhibition，the strength even improves to a certain degree. Under the condition of the same layering time，evaporation retardants has no effect on the shear strength of the four-graded concrete.
Key words：evaporation retardants，four-graded concrete，water evaporation，strength