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  5. Study of the adsorptive behaviors of polynaphthalene sulphonate superplasticizer on alite-sulphoalum

Study of the adsorptive behaviors of polynaphthalene sulphonate superplasticizer on alite-sulphoalum

来源 :The 14th International Congress on the Chemistry of Cement ( | 被引量 : 0次 | 上传用户：bblp520a
【摘 要】
：
The adsorption amount of polynaphthalene sulphonate superplasticizer (NSF) on the surface of alite-sulphoaluminate cements of different mineral composition were detected by ultraviolet-visible absorpt
【作 者】
：
Li Yanjun Wu Changliang Cui Qianqian Qi Tao Liu Xiaocun 
【机 构】
：
School of Materials Science and Engineering, University of Jinan, Jinan Shandong, 250022, China
【出 处】
：
The 14th International Congress on the Chemistry of Cement (
【发表日期】
：
2015年8期
【关键词】
：
alite-sulphoaluminate cement mineral composition NSF adsorption 
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　　The adsorption amount of polynaphthalene sulphonate superplasticizer (NSF) on the surface of alite-sulphoaluminate cements of different mineral composition were detected by ultraviolet-visible absorption spectrometry.The adsorptive behaviors of NSF on the surface of cement particles in the hydration system were investigated.The results showed that the adsorption amount of NSF on the cement increased with higher initial concentration;the adsorption amount and the maximum adsorption amount increased with prolonged hydration time;with a certain content of C3S, the increased amount of calcium sulphoaluminate (3CaO·3A12O3·CaSO4,C4A3(S)) leads to observably increased adsorption amount and the maximum adsorption amount of NSF on cement.The total adsorption amount is much more than that of Portland cement.
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