Effects of PCE on the Dispersion of Cement Particles and Initial Hydration

被引：23

作者：

Zhu, Weiwei ^{[1
,2
]}

Feng, Qingge ^{[3
]}

Luo, Qi ^{[4
]}

Bai, Xiukui ^{[3
]}

Lin, Xianhao ^{[3
]}

Zhang, Zhao ^{[3
]}

机构：

[1] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

[2] Guangxi Univ Nationalities, Sch Mat & Environm Engn, Nanning 530004, Peoples R China

[3] Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China

[4] Chongqing Jiaotong Univ, Sch Civil Engn, Chongqing 400074, Peoples R China

来源：

MATERIALS | 2021年 / 14卷 / 12期

基金：

中国国家自然科学基金;

关键词：

PCE; water-to-cement ratios; dispersing properties; initial hydration; WATER FILM THICKNESS; PORTLAND-CEMENT; PACKING DENSITY; SUPERPLASTICIZER; MICROSTRUCTURE; FLOWABILITY; ADMIXTURES; PERFORMANCE; ADSORPTION; CHEMISTRY;

D O I：

10.3390/ma14123195

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of polycarboxylate superplasticizers (PCEs) on the dispersing properties and initial hydration of cement particles with various water-to-cement (w/c) ratios was investigated, including the water film thickness (WFT), rheology, fluidity, adsorption of PCEs, zeta potential, degree of hydration, hydration products. The experimental results demonstrate that the initial rheological and fluidity parameters were more sensitive to the PCE dosage at a lower w/c because the WFT and the zeta potential on cement particles change more significantly. Moreover, the higher adsorption amounts of the PCEs at a lower w/c lead to a stronger inhibition of the initial hydration, whilst, at the same PCE dosage, the cement pastes have a more rapid fluidity loss and quicker hydration reactions at a higher w/c due to a lower adsorption amount of the PCE on cement particles.

引用

页数：17

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