抗裂材料对面板混凝土性能影响试验研究  

Experimental Research on the Influence of Crack Resistant Materials on the Performance of Panel Concrete

作　　者：闵永涛 毕亚丽[1] 贺晶晶 卢浩丹 樊李浩 赵坤龙 MIN Yong-tao;BI Ya-li;HE Jing-jing;LU Hao-dan;FAN li-hao;ZHAO Kun-long(Power China Northwest Engineering Corporation Limited,Xiʹan 710065,Shaanxi Province,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《中国农村水利水电》2023年第4期257-262,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(5207090694);陕西省自然科学基础研究计划资助项目(2021JQ-983)。

摘　　要：在常态面板混凝土中分别掺入纤维素纤维、聚丙烯纤维及增强密实(抗裂)剂3种抗裂材料,形成抗裂面板混凝土,对其力学性能、耐久性能、干缩性能以及早期抗裂性能开展试验研究,分析抗裂材料对面板混凝土性能的影响规律。结果表明:3种抗裂材料对混凝土的拉伸、抗渗、抗冻及早期抗裂性能有不同程度地提升作用,可明显减少和抑制混凝土的干缩变形;而对混凝土各龄期抗压强度均无显著影响,对混凝土弹性模量有一定降低作用。纤维素纤维对混凝土的极限拉伸值、轴拉强度、干缩变形和混凝土早期抗裂性能的改善最优,而增强密实(抗裂)剂对混凝土抗渗性能的改善最优。研究结论可为面板混凝土配合比设计提供参考。Cellulose fiber,polypropylene fiber and reinforced dense(crack resistant)agent are added to normal panel concrete to form crack resistant panel concrete.Experimental studies are carried out on its mechanical properties,durability,dry shrinkage and early crack resis⁃tance.And the influence law of crack resistant materials on the performance of panel concrete is analyzed.The results show that the three an⁃ti-crack materials can improve the tensile,impermeability,frost resistance and early crack resistance of concrete to varying degrees.They can obviously reduce and restrain the dry shrinkage deformation of concrete.It has no significant effect on the compressive strength of con⁃crete at each stage,and has a certain reduction on the elastic modulus of concrete.Cellulose fiber can best improve the ultimate tensile val⁃ue,axial tensile strength,dry shrinkage deformation and early crack resistance of concrete.Reinforced dense(crack resistant)agent can best improve the impermeability of concrete.The research conclusion can provide a reference for the mix proportion design of panel concrete.

关 键 词：面板混凝土 抗裂性能 纤维素纤维 聚丙烯纤维 增强密实(抗裂)剂 

分 类 号：TV431[水利工程—水工结构工程]