文献类型：期刊文献

英文题名：Investigation of the behavior and mechanism of action of ether-based polycarboxylate superplasticizers absorption on large bibulous stone powder

作者：Deng, Zuiliang[1,2]; Lu, Guimin[1]; Fu, Lefeng[2,3]; Wang, Weishan[2,3]; Zheng, Baicun[2,3]

机构：[1] School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Technical Center, Shanghai Sunrise Polymer Material Co. Ltd, Shanghai, 200231, China; [3] Shanghai Engineering Research Center of Construction Admixtures, Shanghai, 200231, China

年份：2021

卷号：14

期号：11

外文期刊名：Materials

收录：EI(收录号：20212310456706)

语种：英文

外文关键词：Infrared spectroscopy - Thermogravimetric analysis - Adsorption - Pore size - Aggregates

摘要：The aim of this paper is to study the adsorption behavior of polycarboxylate superplasticizers (PCE) on coarse aggregates with a property of high water consumption (above 2%). The coarse aggregates were ground into a powder to create large bibulous stone powder, and it was observed that significant amounts of the ether-based PCE were absorbed onto large bibulous stone powder. The adsorption rate immediately reached a maximum after 5 min and then gradually decreased until an equilibrium absorption was established after 30 min. Zeta potential, infrared spectroscopy, and thermogravimetric analysis (TGA) measurements confirmed that the polycarboxylate superplasticizer adsorbed on the surface of the stone powder. Hydrodynamic diameter measurements showed that the polycarboxylate superplasticizer molecules were smaller than pore size, and the surface area and pore volume were reduced by the polymer incorporation in the pores. ? 2021 by the authors. Licensee MDPI, Basel, Switzerland.