摘要
通过室内试验研究了单掺4种聚合物乳液,双掺聚合物乳液与5种岩性粗骨料对轨枕用混凝土耐磨性能的提升效果,并选取3组耐磨性能较好混凝土的配合比制备轨枕进行承轨面耐磨性能测试。结果表明:单掺苯丙、丁苯等聚合物乳液能有效改善混凝土内部微观结构,提高混凝土的耐磨性,但会降低混凝土的抗压强度;4种乳液中乙酸乙烯酯-乙烯共聚乳液对混凝土耐磨性能的提升效果最好,其最佳掺量为6%;乙酸乙烯酯-乙烯共聚乳液与5种骨料组合可进一步提升混凝土的耐磨性能,骨料中钢渣石对耐磨性能的提升效果最好,其掺量为50%时混凝土承轨面的耐磨性能最佳。
Through laboratory tests,the effect of single mixing of 4 polymer emulsion,double mixing of polymer emulsion and 5 kinds of lithology coarse aggregate on the wear resistance of sleeper concrete was studied.3 groups of concrete sleeper with good wear resistance and mix proportion were selected to test the wear resistance of rail bearing surface.The results show that single mixing of styrene acrylate,styrene polymer emulsion or others can effectively improve the internal microstructure of concrete and improve the wear resistance of sleeper concrete,but will reduce the compressive strength of concrete.Among the 4 kinds of emulsions,vinyl acetate-ethylene copolymer emulsion has the best effect on the wear resistance of concrete,and its optimum content is 6%.The combination of vinyl acetate-ethylene copolymer emulsion with 5 kinds of aggregate can further improve the wear resistance of concrete.The steel slag stone in aggregate has the best effect on improving the wear resistance,and the wear resistance of the rail bearing surface of the concrete sleeper is the best when its content is 50%.
作者
王月华
翁智财
刘子科
胡建伟
谢永江
何龙
蒋睿
WANG Yuehua;WENG Zhicai;LIU Zike;HU Jianwei;XIE Yongjiang;HE Long;JIANG Rui(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;State Key Laboratory for Track Technology of High-Speed Railway,Beijing 100081,China)
出处
《铁道建筑》
北大核心
2021年第2期113-116,共4页
Railway Engineering
基金
中国铁道科学研究院集团有限公司基金(2018YJ049)。
关键词
工程材料
轨枕混凝土
试验研究
聚合物乳液
钢渣石
耐磨性能
engineering materials
sleeper concrete
experimental research
polymer emulsion
steel slag stone
wear resistance
