纤维混杂技术对高性能混凝土的早期抗裂性的影响  

Effects of hybrid fibers on the resistance to cracking of the high-performance concrete at early age

作　　者：张伟[1] 宗兰[1] 张士萍[1] 

机构地区：[1]南京工程学院,江苏南京211167

出　　处：《混凝土》2016年第8期16-18,22,共4页Concrete

基　　金：南京工程学院校级科研基金项目(QKJB201306);国家自然科学基金课题(51108231)

摘　　要：采用平板限制收缩试验法,研究了纤维混杂复合技术对高性能混凝土的早期抗裂性的影响。结果表明,纤维增强高性能混凝土的早期抗裂性由强到弱的顺序为:聚酯纤维增强高性能混凝土>聚丙烯纤维增强高性能混凝土>钢纤维增强高性能混凝土>多元混杂纤维增强高性能混凝土。因此,采用聚酯纤维增强高性能混凝土是防止混凝土早期塑性收缩开裂的理想技术。With a slab test of restricted shrinkage,the effects of hybrid fibers on the resistance to cracking of the high-performance con- crete at early age is invested.The results show that the order from large to small of the early-age crack resistance of concretes with hybrid fibers is the resistance to cracking of the concrete reinforced by polyester fibers〉the concrete reinforced by polypropylene fiber〉the con- crete reinforced by steel fiber〉the concrete reinforced by hybrid fibers.Therefor using polyester fibers to reinforce the high-performance concrete is benefit to the plastic shrinkage and cracking of concretes.

关 键 词：高性能混凝土 聚酯纤维 塑性收缩 开裂 

分 类 号：TU528.572[建筑科学—建筑技术科学]