Responsive superplasticizers for active rheology control of cementitious materials

被引：9

作者：

De Schutter, Geert ^{[1
]}

Ezzat, Metwally ^{[1
,2
]}

Lesage, Karel ^{[1
]}

Hoogenboom, Richard ^{[2
]}

机构：

[1] Univ Ghent, Fac Engn & Architecture, Dept Struct Engn & Bldg Mat, Magnel Vandepitte Lab, Technol Pk Zwijnaarde 60, B-9052 Ghent, Belgium

[2] Univ Ghent, Ctr Macromol Chem CMaC, Dept Organ & Macromol Chem, Supramol Chem Grp, Krijgslaan 281-S4, B-9000 Ghent, Belgium

来源：

CEMENT AND CONCRETE RESEARCH | 2023年 / 165卷

基金：

欧盟地平线“2020”; 英国科研创新办公室; 欧洲研究理事会;

关键词：

Rheology; Admixtures; Cement paste; Functional polymers; Active rheology control; MAGNETIC NANOPARTICLES; SURFACE FUNCTIONALIZATION; POLYMERS; DOPAMINE; CONCRETE; IMPACT; FIELD;

D O I：

10.1016/j.cemconres.2022.107084

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Actual concrete mixtures and casting processes do not enable on-demand real-time adjustment of the rheology of the fresh concrete, forcing operators to passively rely on the intrinsic evolution of the material properties during processing. Newly-developed functional polymers responsive to external electromagnetic trigger signals can be used as chemical admixtures in fresh cementitious materials to enable active rheology control (ARC) and active stiffening control (ASC) on demand. Polycarboxylate ether (PCE) based superplasticizers can be given extra functionalities by incorporating specific chemical groups. A TEMPO-based extension of PCE enables redox-controlled adsorption on cement particles, adjusting rheological properties. A DOPA-based extension of PCE in combination with magnetic nanoparticles enables magneto-rheological control. This paper presents the labora-tory proof of concept results and opens a ground-breaking route for on-demand adjustment of rheology of fresh concrete in the post-mixing stage.

引用

页数：12

共 49 条

[1] Magnetic Nanoparticles as a Redispersing Additive in Magnetorheological Fluid [J].