The Influence of Vinyl Polymers on the Characteristics of Polymer-Modified Mortars

SP-173: Fifth CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete Pub Date : 1997-09-01 DOI:10.14359/6183

R. Arcozzi, G. Ferrari, L. Gini, G. Pistolesi

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Abstract

Seven different polymer latexes, characterized by different resistance to alkaline hydrolysis, were used to produce polymer-modified cement mortars. The following polymers were tested: styrene-butadiene copolymer, vinyl acetate-vinyl versatate copolymer, vinyl acetate-vinyl versatates terpolymer, vinyl acetate-ethylene copolymer, vinyl acetate-vinyl propionate copolymer, vinyl acetate-dibutyl maleate copolymer and vinyl acetate homopolymer. Measurements of compressive strength, dynamic modulus of elasticity, water absorption and bond-strength to a concrete substrate were carried out on the polymer-modified mortars in comparison to a reference mixture without polymers. Infrared and XRD analytical techniques were used to investigate the alkaline hydrolysis of the polymers and cement hydration, respectively. The results indicate that polymers with higher resistance to hydrolysis performed better in terms of higher bond strength to the concrete substrate and lower water absorption of the corresponding mortars.

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乙烯基聚合物对聚合物改性砂浆性能的影响

采用7种抗碱性水解性能不同的聚合物乳胶制备聚合物改性水泥砂浆。测试了以下聚合物:苯乙烯-丁二烯共聚物、醋酸乙烯-泛酸乙烯共聚物、醋酸乙烯-泛酸乙烯共聚物、醋酸乙烯-乙烯-乙烯共聚物、醋酸乙烯-丙酸乙烯共聚物、醋酸乙烯-马来酸二丁酯共聚物和醋酸乙烯均聚物。对聚合物改性砂浆进行了抗压强度、动态弹性模量、吸水率和与混凝土基体的粘结强度的测量，并与不含聚合物的参考混合物进行了比较。采用红外和XRD分析技术分别对聚合物的碱水解和水泥水化进行了研究。结果表明，抗水解性能越好的聚合物与混凝土基体的粘结强度越高，砂浆的吸水率越低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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SP-173: Fifth CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete

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