混杂钢纤维高强再生混凝土力学性能研究  

Study on mechanical properties of high strength recycled concrete with hybrid steel fiber

作　　者：郭璨 裴长春[1] Guo Can;Pei Changchun(College of Engineering,Yanbian University,Yanji 133002,Jilin)

机构地区：[1]延边大学工学院,吉林延吉133002

出　　处：《工程建设》2020年第8期12-17,共6页Engineering Construction

摘　　要：高强混凝土(High Strength Concrete,HSC)因其强度高、内部组织致密、耐久性能良好而在工程中被广泛使用。然而在HSC中加入再生骨料后会影响混凝土的整体性能,相比于普通混凝土,其脆性更大,导致结构的安全性降低。为改善高强再生混凝土(High Strength Recycled Concrete,HSRC)的脆性及抗裂性能,本文设计5组采用不同的混杂钢纤维(Hybrid Steel Fiber,HSFR)体积掺率的试验,分析其对HSRC力学性能的影响。结果表明:随着HSFR掺率的增加,HSRC的抗压强度、劈拉强度均有不同幅度的提高,但掺率过高时,抗压强度、劈拉强度有下降趋势;当HSFR掺率为1.2%时,HSRC的力学性能最优。High strength concrete(HSC)is widely used in engineering because of its high strength,dense internal structure and good durability.However,the addition of recycled aggregate in HSC will affect the overall performance of concrete.The brittleness of HSC is more obvious than that of ordinary concrete,which will affect the safety of structure.In order to reduce the brittleness and improve the crack resistance of high-strength recycled concrete(HSRC),5 set of tests are designed with different volume fraction of hybrid steel fiber(HSFR)to analyze its effect on the mechanical properties of HSRC.The results show that the compressive strength and splitting tensile strength of HSRC increase first and then decrease with the incorporation of HSFR;when volume fraction is 1.2%,the mechanical properties of HSRC is the best.

关 键 词：高强再生混凝土 力学性能 抗裂性能 混杂钢纤维 体积掺率 

分 类 号：TU528.572[建筑科学—建筑技术科学]