Title: Synthesis and Properties of High Solid-Content Polycarboxylate Superplasticizer

Author(s): Yongwei Wang; Liya Wang; Yongsheng Liu; and Zepeng Chu

Publication: Symposium Paper

Volume: 302

Issue:

Appears on pages(s): 125-132

Keywords: polycarboxylate; high solid-content; workability

DOI: 10.14359/51688089

Date: 6/1/2015

Abstract:
In this study, the polycarboxylate superplasticizers (PCs) with solid content up to 80% were synthetized using special redox initiator at 318K. In the radical polymerization reactions, combining with Fourier Transform Infrared Spectroscopy (FTIR) and Gel Permeation Chromatograph (GPC), the initiator dosing dosage, reaction temperature, reaction time and the concentration of system in the copolymerization reaction were systematic investigated through orthogonal design experiments. The performances of new PCs in cement paste were tested by measuring the fluidity and fluidity retention. The slump and the compressive strengths of concrete were also determined. Compared with traditional PC, the new PC has a better advantage in workability of fresh concrete and mechanical properties of hardened concrete.