高延性再生微粉混凝土抗拉性能试验研究  

Experimental study on tensile properties of high ductility recycled powder concrete

作　　者：郭强[1] 李秀领[2] 王帅[1] 杨冠杰 王健[1] 吕相蓉 尚文涛 GUO Qiang;LI Xiuling;WANG Shuai;YANG Guanjie;WANG Jian;Lü Xiangrong;SHANG Wentao(The Second Construction Limited Company of China Construction Eighth Engineering Division,Jinan 250000,China;School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]中建八局第二建设有限公司,山东济南250000 [2]山东建筑大学土木工程学院,山东济南250101

出　　处：《混凝土》2022年第2期102-106,共5页Concrete

基　　金：国家自然科学基金面上项目(51278290);山东省自然科学基金项目(ZR2020ME245);中国地震局工程力学研究所实验室开放课题(2019D10)。

摘　　要：为了实现建筑固废的资源化利用,以再生微粉为研究对象,探究了PVA纤维掺量、水胶比、砂胶比、再生微粉替代率、减水剂掺量对再生微粉混凝土抗拉性能的影响规律。试验研究表明,水胶比是影响高延性再生微粉混凝土抗拉强度的最主要因素,随着水胶比的增大,抗拉强度逐渐降低;PVA纤维掺量是影响抗拉强度的次要因素,当PVA纤维掺量为1.5%时,抗拉强度达到最大,随后随PVA纤维掺量而降低;再生微粉掺量在25%时抗拉强度达到峰值,如果掺量继续增加,抗拉强度将下降。适量的再生微粉可以改善高延性再生微粉混凝土的应变硬化性能,因此具有较好的推广应用前景。In order to realize the resource utilization of building solid waste,takes recycled powder as research object,and explores the mixing amount of PVA fiber,water-binder ratio,sand-binder ratio,replacement rate of recycled powder,water reducing agent dosage on the tensile performance of recycled powder concrete.The results show that the water-binder ratio is the most important factor affecting the tensile strength of high ductility recycled powder concrete,and the tensile strength decreases with the increase of water-binder ratio.The content of PVA fiber is the secondary factor affecting the tensile strength.When the content of PVA fiber is 1.5%,the tensile strength reaches the maximum,and then decreases with PVA fiber increase.The tensile strength reached the peak when the recycled powder content was 25%,and the tensile strength would decrease if the content continued to increase.Moderate amount of recycled powder can improve the strain hardening property of high ductility recycled powder concrete,so it has a good prospect of popularization and application.

关 键 词：高延性 再生微粉混凝土 水胶比 PVA纤维 抗拉性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]