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.
作者
朱志方
吴都督
魏大晗
王珩
杨虎
戈雪良
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)
出处
《水力发电》
CAS
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)。
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
hydraulic concrete
impact-abrasion resistance
anti-cracking agent
mechanical property
deformation property
pore structure
