钢纤维及丁苯乳液对混凝土韧性及耐磨性能的影响  

Effect of steel fiber and styrene-butadiene rubber latex on the toughness and abrasion resistance of cement concrete

作　　者：李洋[1] 刘纪伟[1] 安小龙[1] 李晶晶[1] 周明凯[2] 

机构地区：[1]江苏省交通科学研究院股份有限公司,江苏南京210017 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070

出　　处：《混凝土》2015年第12期71-74,共4页Concrete

基　　金：交通运输部科研项目(2011318223420)

摘　　要：针对普通水泥混凝土韧性及耐磨性较差的问题,采用钢纤维和丁苯乳液对其进行了改性,并对改性混凝土的韧性及耐磨性进行了研究。结果表明:单掺钢纤维(20~50 kg/m^3)或丁苯乳液(70~90 kg/m^3)均能改善其弯曲韧性、抗冲击性能及耐磨性,且随着掺量的增加呈现上升趋势;钢纤维、聚合物复掺时,其柔韧性及耐磨性会得到进一步改善,且改善效果明显好于单掺效果;另外,探讨了钢纤维及聚合物乳液对混凝土的复合改性机理。Steel fiber and styrene -- butadiene rubber latex were filled into concrete to solve the problem of the poor toughness and abra- sion resistance of Portland cement concrete.Experiments were done to study the toughness and abrasion resistance of the modified con- crete. The results showed that either addition of steel fiber（20 - 50 kg/m3 ） or syrene - butadiene latex （ 70 - 90 kg/m3 ） could improve the flexural toughness,impact resistance and abrasion resistance, and the more content of fiber or polymer emulsion, the better effect would be got. Those performance could be further improved when fiber - polymer complex - doped, and were better than single - doped. In ad- dition, mechanism of improving toughness of concrete by addition of steel fiber and polymer emulsion was analyzed.

关 键 词：钢纤维 丁苯乳液 抗冲击性能 弯曲韧性 耐磨性 改性机理 

分 类 号：TU528.041[建筑科学—建筑技术科学]