文献类型：期刊文献

英文题名：Effect of the Alkyl Density of Acrylic Acid Ester on the Viscosity-Reducing Effect of Polycarboxylate Superplasticizer

作者：Chen, Yingying Chen, Yujie Liu, Yuan Tao, Jia Liu, Runxia Li, Ziwei Liu, Fei Li, Min

第一作者：Chen, Yingying

通信作者：Li, ZW[1];Liu, F[1];Li, M[1];Li, M[2]

机构：[1]Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China;[2]China Railway Fifth Bur Grp Co Ltd, Guiyang 550003, Peoples R China;[3]Guizhou Tianwei Bldg Mat Technol Co Ltd, Guiyang 550025, Peoples R China;[4]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China.|贵州理工学院土木工程学院;贵州理工学院;

年份：2023

卷号：28

期号：21

外文期刊名：MOLECULES

收录：;Scopus(收录号：2-s2.0-85176544336);WOS:【SCI-EXPANDED(收录号:WOS:001099457200001)】；

基金：The authors would like to thank Dongke Company from China for their chemical donations that we used for our experiments, such as HPEG. We would like to thank all staff members in Guizhou Tianwei Building Materials Technology Co., LTD, for their kind help in providing their labor work during the concrete test experiments.

语种：英文

外文关键词：polycarboxylate superplasticizer; acrylic acid ester; viscosity-reducing effect; methyl acrylate; cement pastes; concrete

摘要：Concrete is vital for the development of modern buildings. However, they suffer from the high viscosity problem in their application process due to the use of a low water-cement ratio in order to maintain their high strength. Developing PCEs with the presence of ester functional groups in their molecular structure is one of the most effective measures to improve the flowability of concrete. Here, three PCEs with different alkyl densities of acrylic acid ester: PCE-M, PCE-E, and PCE-B were designed to explore their viscosity-reducing effect on the performance of cement and concrete. The structures of the three PCEs were characterized via Fourier transform infrared (FTIR) spectra, proton nuclear magnetic resonance (1H NMR), and gel permeation chromatography (GPC). Their properties were also determined via zeta potential, surface tension, and rheological experiments. It was found that PCE-M had the best performance, with the lowest surface tension, highest zeta potential, and therefore highest charge density on the cement particles, lowest viscosity, and highest flowability of cement paste, and exhibited the best performance of concrete in terms of workability. The best performance of PCE-M in reducing the viscosity of cement and concrete can be ascribed to the smallest amount of water-repellent alkyl groups, enhancing the electrostatic repulsion and reducing the viscosity, thereby boosting the dispersion and stabilization of cement pastes and concrete. This study shed lights on designing other PCEs with high viscosity-reducing effects via an ester group control.