聚羧酸减水剂与莫桑比克马普托大桥大吸水率粗骨料材料适应性研究  

Research on the adaptability of polycarboxylate superplasticizer for large water absorption aggregate concrete of Maputo Bridge

作　　者：王学锋 陈存振 邓最亮 郭亚楠[3] 傅乐峰 龚颜军 

机构地区：[1]中交路桥建设有限公司,北京100027 [2]同济大学,上海200092 [3]上海三瑞高分子材料股份有限公司,上海200237 [4]华东理工大学,上海200232

出　　处：《混凝土》2017年第12期79-82,86,共5页Concrete

摘　　要：莫桑比克马普托大桥是非洲第一大悬索桥,受当地地材的限制,该项目采用了吸水率大于2%的高吸水率粗骨料,为了保证该项目混凝土的顺利配制,研究了粗骨料中石粉替代胶凝材料后的流动性以及流变性,并通过吸附试验确定聚羧酸减水剂在石粉上的最大吸附量远小于在水泥上的饱和吸附量,利用红外光谱表征证明聚羧酸减水剂在石粉上的吸附为物理吸附。The Maputo Bridge in Mozambique is Africa＇s largest suspension bridge, which using the coarse aggregate with water absorp- tion more than 2% due to the material limitations. In order to assure the quality of concrete, it studied the flowability and theology of mor- tar in which we used the powder in coarse aggregate replace of Binder. The maximum absorption of polycarboxylate superplasticizer on powder was low than that on cement, and absorb behavior was represented as physical absorption by infi＇ared spectroscopy.

关 键 词：聚羧酸减水剂 大吸水率骨料 马普托大桥 流变性 孔分布 

分 类 号：TU528.041[建筑科学—建筑技术科学]