Influences of Soluble Salts on Adsorption Properties of Polycarboxylate Superplasticizers

武汉理工大学学报-材料科学版(英文版), 2012, 27(4): 684-688. doi: 10.1007/s11595-012-0529-9

^1, , ^2, , ^3, , ^4, , ^5,

1.Institute of Concrete and Environmental Material,China University of Mining and Technology(Beijing),Beijing 100083,China

2.Institute of Concrete and Environmental Material,China University of Mining and Technology(Beijing),Beijing 100083,China

3.Institute of Concrete and Environmental Material,China University of Mining and Technology(Beijing),Beijing 100083,China

4.Institute of Concrete and Environmental Material,China University of Mining and Technology(Beijing),Beijing 100083,China

5.Institute of Concrete and Environmental Material,China University of Mining and Technology(Beijing),Beijing 100083,China

基金项目: The National Natural Science Foundation of China(50872151)

Influences of Soluble Salts on Adsorption Properties of Polycarboxylate Superplasticizers

WANG Dongmin ^1, , CHENG Peifu ^2, , XIONG Weifeng ^3, , SONG Taowen ^4, , WU Zengli ^5,

1.Institute of Concrete and Environmental Material,China University of Mining and Technology(Beijing),Beijing 100083,China

2.Institute of Concrete and Environmental Material,China University of Mining and Technology(Beijing),Beijing 100083,China

3.Institute of Concrete and Environmental Material,China University of Mining and Technology(Beijing),Beijing 100083,China

4.Institute of Concrete and Environmental Material,China University of Mining and Technology(Beijing),Beijing 100083,China

5.Institute of Concrete and Environmental Material,China University of Mining and Technology(Beijing),Beijing 100083,China

Keywords： soluble salts

Polycarboxylate (PC) superplasticizers with different chemical structures were synthesized through free radical co-polymerization reaction.A total organic carbon analyzer was used to investigate adsorption behaviors of PCs,and to evaluate influences of soluble salts on absorption properties of PCs.It is found that adsorption ratios of PCs on cement particles decrease greatly with the addition of Na2SO4; the adsorption ratio of ethers PC with Hydroxyethyl methacrylate (HEMA) group first increases then decreases with the addition of NaCl; the adsorption ratio of esters PC with short side chains first decreases then increases,while the adsorption ratio of ethers PC with HEMA group decreases with the addition of CaCl2; the adsorption ratio of esters PC with short side chains decreases with the addition of Ca(NO3)2; AlCl3 causes the decrease of the adsorption ratio of ethers PC with HEMA group.

参考文献

[1]	Pierre-Claude Aitcin .Cements of yesterday and today Concrete of tomorrow[J].Cement and Concrete Research,2000(9):1349-1359.

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Influences of Soluble Salts on Adsorption Properties of Polycarboxylate Superplasticizers

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