鳞片改性对混凝土细观抗裂性能影响的试验研究  

EXPERIMENTAL RESEARCH ON THE EFFECT OF FLAKE MODIFICATION ON MICRO-CRACK RESISTANCE OF CONCRETE

作　　者：李文枭 杨勇新[1] 邹经 董世成 刘祥 李家兴 李彪[1] 赵进阶[1] LI Wenxiao;YANG Yongxin;ZOU Jing;DONG Shicheng;LIU Xiang;LI Jiaxing;LI Biao;ZHAO Jinjie(Central Research Institute of Building and Construction Co.,Ltd.,MCC Group,Beijing 100088,China;Yingkou Jianke Institute of Basalt Fiber,Yingkou 115000,China)

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]营口建科玄武岩纤维研究所,辽宁营口115000

出　　处：《工业建筑》2020年第3期136-141,共6页Industrial Construction

基　　金：国家重点研发计划(2016YFB0303200)。

摘　　要：工程中常采用在混凝土中添加纤维的方法来增强混凝土的抗裂能力。鳞片是一种具有良好力学性能的微米级材料,通过在混凝土中添加不同掺量、不同规格的玻璃鳞片、玄武岩鳞片,进行6组混凝土平板试验、6组混凝土抗折强度测试及6组声发射测试试验,研究鳞片改性后混凝土早期抗裂性能、硬化后力学性能以及断裂过程中裂缝发展的变化规律。试验结果表明:鳞片能有效减少混凝土早期裂缝开裂面积,提升抗折强度,且主要提高了混凝土中微米级细观抗裂能力。The method of adding fiber into concrete has been commonly used in engineering to improve the crack resistance of concrete. The flake is a micron-sized material with good mechanical properties and corrosion resistance.In the paper,six groups of concrete flat plate tests,six groups of concrete flexural strength tests and six groups of acoustic emission tests were carried out by adding different contents of glass flake and basalt flake into concrete. The early crack resistance,mechanical properties after hardening,fracture process of concrete modified by flake and the change law of the development of the middle fracture were studied. The test results showed that flake could effectively reduce the early cracking area of concrete,improve the flexural strength,and mainly improve the micro-crack resistance of concrete.

关 键 词：鳞片 混凝土 抗裂 平板试验 抗折试验 声发射试验 

分 类 号：TU528[建筑科学—建筑技术科学]