Open Access

ARTICLE

Influence of High-Robustness Polycarboxylate Superplasticizer on the Performances of Concrete Incorporating Fly Ash and Manufactured Sand

by Panpan Cao^1,2, Xiulin Huang^1,3,*, Shenxu Bao⁴, Jin Yang^5,*

1 Macheng Hubei University Research Academy of Industrial Technology, Huanggang, 438300, China
2 Hubei Jueshuo New Material Technology Co., Ltd., Huanggang, 438300, China
3 School of Materials Science and Engineering, Hubei University, Wuhan, 430000, China
4 School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, China
5 School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China

* Corresponding Authors: Xiulin Huang. Email: ; Jin Yang. Email:

(This article belongs to the Special Issue: Advances in Solid Waste Processing and Recycling Technologies for Civil Engineering Materials)

Fluid Dynamics & Materials Processing 2023, 19(8), 2041-2051. https://doi.org/10.32604/fdmp.2023.027399

Received 27 October 2022; Accepted 14 December 2022; Issue published 04 April 2023

Abstract

Using ethylene glycol monovinyl polyoxyethylene ether, 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and acrylic acid as the main synthetic monomers, a high robustness polycarboxylate superplasticizer was prepared. The effects of initial temperature, ratio of acid to ether, amount of chain transfer agent, and synthesis process on the properties of the superplasticizer were studied. The molecular structure was characterized by GPC (Gel Permeation Chromatography) and IR (Infrared Spectrometer). As shown by the results, when the initial reaction temperature is 15°C, the ratio of acid to ether is 3.4:1 and the acrylic acid pre-neutralization is 15%, The AMPS substitution is 10%, the amount of chain transfer agent is 8%, and the performance of the synthesized superplasticizer is the best. Compared with commercially available ordinary polycarboxylate superplasticizer in C30 concrete prepared with manufactured sand and fly ash, the bleeding rate decreases by 52%, T50 decreases by 1.2 s, and the slump time decreases by 1.1 s. In C60 concrete prepared with fly ash and river sand, the bleeding rate decreases by 46%, T50 decreases by 0.8 s, and the slump time decreases by 3.2 s.

---

Graphic Abstract

---

Keywords

---