Effect of side chains on the dispersing properties of polycarboxylate-type superplasticisers in cement systems
Effect of side chains on the dispersing properties of polycarboxylate-type superplasticisers in cement systems
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DOI：
10.1680/macr.12.00111
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发表时间：
2013-04
影响因子：
2.7
通讯作者：
Xiongyi Peng;Xia Li;Dong-Dong Chen-Dong;Deyun Ma
中科院分区：
文献类型：
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作者：
Xiongyi Peng;Xia Li;Dong-Dong Chen-Dong;Deyun Ma
为了研究侧链对聚羧酸型高效减水剂（PCs）在水泥浆中的分散性能的影响，合成了具有不同侧链的PCs，并将其用作水泥悬浮液的高效减水剂。系统研究了PC侧链对水泥悬浮液zeta电位、吸附性能、流动性的影响，并计算了颗粒间总势能。结果表明，PC的短侧链比越高，PC的吸附量越大。具有短侧链和长侧链的聚合物比具有短侧链的聚合物具有更好的分散性能，而具有长侧链的聚合物介于两者之间。PC对水泥颗粒的维持分散能力随着短侧链比的增大而增大。聚乳酸产生的粒间总势能的变化规律与聚乳酸在水泥浆体中分散性的变化规律一致。这表明……
To study the effect of side chains on the dispersing properties of polycarboxylate-type superplasticisers (PCs) in cement pastes, PCs with different side chains were synthesised and used as a superplasticiser for cement suspensions. The effect of side chains of PC on the zeta potential, adsorption, fluidity of the corresponding cement suspensions was investigated systematically, and total interparticle potential energy between particles was calculated. The results show that the higher the short side chains ratio of PC, the larger the adsorption amount of PC. PC with both short and long side chains presents a better dispersing property than PC with short side chains, while PC with long side chains falls in between. The maintaining dispersing ability of PC for cement particles increases as the short side chains ratio increases. The changing rule of total interparticle potential energy produced by PC is in accordance with the changing rule of dispersing property of PC in cement pastes. This indicates that th...