纤维增强RAC性能影响试验研究  

Experimental study on the performance of fiber reinforced RAC

作　　者：徐晋 王社良[1,2] 付毅 张明明[1] 

机构地区：[1]西京学院土木工程学院,陕西西安710123 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]北大荒建设集团,黑龙江哈尔滨150090

出　　处：《混凝土》2018年第1期91-95,共5页Concrete

基　　金：西京学院校基金(XJ160128);国家自然科学基金(51178388;51008245;51678480);陕西省教育厅重点实验室科研计划项目(11JS059;12JS055);陕西省科技统筹创新工程计划(2013SZS01-Z02;2013SZS01-K01);陕西省攻关项目(2014K06-34)

摘　　要：为了研究纤维构成的纤维再生混凝土(F-RAC)的力学性能和变形性能,通过72组216块混凝土试件对不同取代率下RAC进行了试验研究,研究结果表明:添加(PPF-1、PPF-2、RSF-1)纤维,其RAC抗折强度均高于基准混凝土,且增幅明显,最大增幅为取代率为50%掺加RSF-1再生子午线钢丝纤维,提高了27.8%,最小增幅亦达到11%左右;峰值应变随着纤维的添加而减少,弹性模量在取代率30%、50%的RAC单掺纤维后,除了RAC添加RSF-1时,弹性模量分别降低5.8%、2.5%以外,其余纤维RAC弹性模量均有所提高;对取代率30%、50%在掺加PPF-1、PPF-2和RSF-1与未掺加纤维的RAC,切向斜率基本相同,而应力继续增大时,未掺加纤维的RAC切向弹性模量相对较大,而掺加纤维后混凝土的切向弹性模量有所降低。In order to study the fiber of fiber recycled concrete （F-RAC） on the mechanical properties and deformation performance, through the 72 groups of 216 pieces of concrete specimens of different substitution rate of RAC were studied, the results showed that the addition of a single （ PPF-1, PPF-2, RSF-1 ） fiber, the flexural strength of RAC were higher than that of the reference concrete, and increased significantly,the largest increase of substitution rate was 50% with RSF-i regeneration of radial steel wire fiber,increased by 27.8%, the smallest increase has reached about 1 l%.The peak strain decreased with the added fiber, elastic modulus in the replacement rate is 30% and 50% of the RAC doped fiber, in addition to add RAC RSF-1, elastic modulus were decreased by 5.8% and 2.5%, the rest of the fiber elastic modulus of RAC were improved.On the replacement rate is 30% and 50% PPF-1 ,and in PPF-2 doped and RSF-1 and not adding fiber RAC,tangential slope of basic phase.When the stress increases, the tangential elastic modulus of RAC without adding fiber is relatively large, and the tangential elastic modulus of concrete is decreased after the addition of fiber.

关 键 词：再生纤维 强度比 变形性能 力学性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]