Effect of competitive adsorption between polycarboxylate superplasticiser and sodium tripolyphosphate on cement paste fluidity
Effect of competitive adsorption between polycarboxylate superplasticiser and sodium tripolyphosphate on cement paste fluidity
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聚羧酸高效减水剂与三聚磷酸钠竞争吸附对水泥净浆流动性的影响
DOI：
10.1680/adcr.15.00009
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发表时间：
2015-11
影响因子：
2
通讯作者：
Lin Chaoliang
中科院分区：
文献类型：
--
作者：
Tan Hongbo;Li Xin;Huang Jian;Ma Baoguo;Qi Changya;Lin Chaoliang
三聚磷酸钠是一种常用的延缓水泥水化、延长水泥净浆凝结时间的缓凝剂。它有时也被用来提高超塑化剂的分散性，以改善水泥和混凝土的流动性和工作性，但这种效果的原因尚不清楚。本文研究了水泥浆体的早期水化过程以及三聚磷酸钠和聚羧酸减水剂（PCS）的吸附。结果表明，PCS与三聚磷酸钠之间存在竞争吸附，三聚磷酸钠抑制PCS在水泥颗粒表面的吸附，PCS也降低了三聚磷酸钠的吸附。当这两者都减少时，吸附层的厚度和zeta电位显著增加，这被证明是流动性改善的主要原因。这表明，某些盐可以用来调节PCS的吸附过程，以改善水泥净浆和新拌混凝土的流动性和工作性。
Sodium tripolyphosphate is a common retarder used to delay the hydration and prolong the setting time of cement paste. It is also sometimes employed to enhance superplasticiser dispersity to improve the fluidity and workability of cement and concrete, but the reason for this effect is unclear. The work discussed in this paper investigated the early hydration process of cement paste and the adsorption of sodium tripolyphosphate and polycarboxylate superplasticiser (PCS). The results show that there is competitive adsorption between PCS and sodium tripolyphosphate, sodium tripolyphosphate inhibits PCS from adsorbing onto the surface of cement particles, and PCS also reduces the adsorption of sodium tripolyphosphate. When both of these are reduced, there is a significant increase in the thickness of the adsorption layer and the zeta potential, which is shown to be the main reason for the improvement in fluidity. This indicates that some salts can be used to adjust the adsorption process of PCS in order to improve the fluidity and workability of cement paste and fresh concrete.
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三聚磷酸钠与萘系高效减水剂竞争吸附对水泥净浆流动性的影响
DOI：
10.1007/s11595-014-0917-4
发表时间：
2014-04
影响因子：
1.6
作者：
Tan Hongbo;Ma Baoguo;Li Xiangguo;Jian Shouwei;Yang Hu
通讯作者：
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影响因子：
11.4
作者：
Yamada, K;Takahashi, T;Matsuhisa, M
通讯作者：
Matsuhisa, M
影响因子：
11.4
作者：
Plank, J.;Winter, Ch.
通讯作者：
Winter, Ch.
DOI：
10.1515/secm-2012-0099
发表时间：
2013-08
期刊：
--
影响因子：
--
作者：
B. Ersoy;S. Dikmen;T. Uygunoğlu;M. Içduygu;T. Kavas;A. Olgun
通讯作者：
B. Ersoy;S. Dikmen;T. Uygunoğlu;M. Içduygu;T. Kavas;A. Olgun
影响因子：
2.1
作者：
M. Alonso;M. Palacios;F. Puertas;Á. G. Torre;M. Aranda
通讯作者：
M. Alonso;M. Palacios;F. Puertas;Á. G. Torre;M. Aranda