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Title: Synthesis and Analysis of an Anti-Segregation Admixture Based on Acrylamide Copolymer

Author(s): Tao Ni, Serina Ng, Zhaoyang Liu, Yongmei Wang, Xin Song, Ke Feng

Publication: Symposium Paper

Volume: 354


Appears on pages(s): 347-356

Keywords: acrylamide copolymer; anti-segregation admixture; compressive strength

DOI: 10.14359/51736087

Date: 7/1/2022

Anti-segregation can be employed to avoid the segregation of concrete. Here, we present a type of polymer-based anti-segregation agent, which is the copolymer of acrylamide and 2-acrylamide-2-methylpropane sulfonic acid. The composition and structure were characterized by FT-IR, NMR, and light scattering. Compared with the cellulose derivative, the copolymer can improve not only the homogeneity and bleeding resistance, but also increase the compressive strengths of the concrete by 4 to 5 MPa across all testing periods, up to 28 days. A highlight of the admixture is that can also be used to restore the workability of concrete isolated on site. Finally, the anti-segregation mechanism of the copolymer was analyzed in this article.