抗裂剂对干热环境抗冲磨混凝土性能影响研究  

Study on the Effect of Anti-cracking Agents on the Performance of Impact-abrasion Resistant Concrete in Dry and Hot Environments

作　　者：朱志方 吴都督[2] 魏大晗 王珩[4] 杨虎[4] 戈雪良[4] ZHU Zhifang;WU Dudu;WEI Dahan;WANG Heng;YANG Hu;GE Xueliang(Operation and Safety Center for River and Lake Protection and Construction of the Yellow River Conservancy Commission,Zhengzhou 450003,Henan,China;Sinohydro Engineering Bureau 8 Co.,Ltd.,Changsha 410004,Hunan,China;Huaneng Lancang River Hydropower Inc.,Kunming 650209,Yunnan,China;Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu,China)

机构地区：[1]黄河水利委员会河湖保护与建设运行安全中心,河南郑州450003 [2]中国水利水电第八工程局有限公司,湖南长沙410004 [3]华能澜沧江水电股份有限公司,云南昆明650209 [4]水利部交通运输部国家能源局南京水利科学研究院,江苏南京210029

出　　处：《水力发电》2024年第11期40-45,共6页Water Power

基　　金：国家自然科学基金长江水科学研究联合基金资助项目(U2340228);中央级公益性科研院所基本科研业务费专项资金项目(Y423005)。

摘　　要：结合我国西南某流域干热河谷地区某大型水电工程,深入开展了高效抗裂剂对水工混凝土力学性能、变形性能和抗冲磨性能的演化规律研究。结果表明,掺加高效抗裂剂的水工混凝土,其自生体积变形和抗冲磨强度较基准组有所增加,增加量与高效抗裂剂的掺量呈正相关;单位面积上的总开裂面积、干缩率较基准组有所减少,减少量与高效抗裂剂的掺量呈正相关。从孔结构分析角度阐释了抗冲磨性能提升的细观机理。综上,高效抗裂剂对水工混凝土的抗冲磨性能有较好的改善作用。In connection with a large hydropower project in dry and hot river valley area in a basin in southwest China,the evolution law of high-efficiency anti-cracking agent on the mechanical properties,deformation properties and impact and abrasion resistance of hydraulic concrete is studied.The results show that,(a)the autogenous volume deformation and the impact-abrasion resistance of hydraulic concrete mixed with high-efficiency anti-cracking agent are increased compared with the baseline group,and the increase is positively correlated with the dosage of high-efficiency anti-cracking agent;and(b)the total cracking area per unit area and the dry shrinkage rate are decreased compared with the baseline group,and the decrease is positively correlated with the dosage of high-efficiency anti-cracking agent.The microscopic mechanism for the enhancement of impact-abrasion resistance is explained from the perspective of pore structure analysis.In conclusion,the high-efficiency anti-cracking agent has a better effect on the improvement of impact-abrasion resistance of hydraulic concrete.

关 键 词：水工混凝土 抗冲磨 抗裂剂 力学性能 变形性能 孔结构 

分 类 号：TV431[水利工程—水工结构工程]