摘要
结合溪洛渡水电站大坝工程,进行改性PVA纤维混凝土的性能试验研究。试验结果表明:适量增加外加剂掺量,改性PVA纤维混凝土可保持良好的拌合物性能。掺改性PVA纤维能有效提高混凝土的早期抗压强度、劈拉强度和极限拉伸值,减小混凝土的干缩率及自生体积收缩变形,显著提高大坝混凝土的抗裂安全系数,改善混凝土的抗裂性,其增强效果在工程应用中也得到验证,试验结果可为其他工程提供技术参考。
Based on project of Xiluodu hydropower dam,test of concrete with modified PVA fiber was carried out,The results showed that con- crete mixture with fiber can maintain good performance by increasing the amount of admixture.Modified PVA fiber can increase early compres- sive strength, splitting tensile strength and ultimate tensile value of concrete, and reduce dry shrinkage and autogenous volume deformation,which significantly improved crack resistance of concrete.Its enhancement in engineering has been verified,the results can provide technical reference for other projects.
出处
《混凝土》
CAS
CSCD
北大核心
2012年第7期124-126,共3页
Concrete
基金
国家自然科学基金项目(51139001
51109015)
中央级公益性科研院所基本科研业务费(CKSF2011018/CL)
关键词
改性PVA纤维
强度
极限拉伸值
干缩率
自生体积变形
抗裂性
modified PVA fiber
strength
value of ultimate tensile
dry shrinkage
autogenous volume deformation
crack resistance
