An Experimental Study on Applying Soda Residue to Water Retention of Mortar
YANG Yibo1,2, PU Yongqiang1, YAN Weijun1, GUO Wenying1, WANG Hengchang1
1 School of Civil Engineering and Transportation,South China University of Technology, Guangzhou 510640; 2 State Key Laboratory of Subtropical Architectures Science, South China University of Technology, Guangzhou 510640
Abstract: Soda residue is the waste discharged from the production of soda ash by ammonia method, its storage and discharge had caused serious environmental problems. The washed soda residue and dechlorination soda residue with lower chloride ion content were obtained by the process of removing chloride ion from the original soda residue. The influence of original soda residue, washed soda residue and dechlorination soda residue on the properties of mortar,and the feasibility of the dechlorination soda residue used as mortar water retention agent were studied. The results show that all types of soda residue replacing 15% of fly ash are conducive to improve the water retention of mortar, but the original soda residue and washed once soda residue may cause durability problems because the higher chloride ion dissolution content. The dechlorination soda residue will not cause durability problems and can be used as mortar water retention agent. When the dechlorination soda residue was used as water retention agent, the mortar had excellent water retention and mechanical properties, and lower shrinkage values. The preferred application way of dechlorination soda residue is replacing parts of the fly ash in the binder, keeping the water binder ratio constant and adding water reducing agent to adjust consistency, and organic water retention agent is not needed.
杨医博, 普永强, 严卫军, 郭文瑛, 王恒昌. 碱渣用作砂浆保水剂的试验研究*[J]. 《材料导报》期刊社, 2017, 31(20): 114-118.
YANG Yibo, PU Yongqiang, YAN Weijun, GUO Wenying, WANG Hengchang. An Experimental Study on Applying Soda Residue to Water Retention of Mortar. Materials Reports, 2017, 31(20): 114-118.
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2017, Vol. 31 
