Mechanical characterization of acrylic — Emulsion polymer-modified concrete reinforced with steel fibre by Taguchi application

D. Hazimmah, S. Mohd
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Abstract

In this study, acrylic emulsion polymer as a polymeric admixture was applied in lightweight steel fibre reinforced cement concrete. The effects of curing conditions and polymer — cement ratio on the compressive and flexural strengths of acrylic emulsion polymer-modified concrete reinforced with steel fibre were investigated. Combined dry and wet curing enable to developed both the strengths of cement matrix and acrylic emulsion polymer together. Inclusion of acrylic emulsion polymer at a certain polymer-cement ratio with steel fibre as reinforcement improves the bonds between the cement matrix and steel fibre due to the acrylic emulsion polymer forms in the cement matrix. In addition, acrylic emulsion polymer modification can significantly improve the flexural strength of the normal steel fibre reinforced concrete. Compared with steel fibre reinforced concrete, the compressive strength of the acrylic emulsion polymer-modified concrete reinforced with steel fibre can increase gradually even after 28 days. The mixtures are tested, both in fresh and hardened states and to meet practical and technical requirement of SFRPMC. The results are analyzed using the Taguchi experimental design methodology. The best possible levels of mix proportions are determined for maximization through compressive strength, splitting tensile strength, flexural strength and modulus of elasticity. Analysis of variance (ANOVA) is performed on the measured data and S/N (signal to noise) ratios. A correlation derived from the results of Taguchi experimental design is proposed as a predictive equation for estimation of strength of these composites.
用田口法研究钢纤维增强丙烯酸乳液聚合物改性混凝土的力学特性
将丙烯酸乳液聚合物作为聚合物外加剂应用于轻钢纤维水泥混凝土中。研究了养护条件和水灰比对钢纤维增强丙烯酸乳液聚合物改性混凝土抗压强度和抗弯强度的影响。干湿复合养护使水泥基体和丙烯酸乳液聚合物的强度同时得到发挥。由于丙烯酸乳液聚合物在水泥基体中形成,以一定的聚合物-水泥比包合丙烯酸乳液聚合物,钢纤维作为增强物,改善了水泥基体与钢纤维之间的粘结。此外,丙烯酸乳液聚合物改性能显著提高普通钢纤维混凝土的抗弯强度。与钢纤维增强混凝土相比,钢纤维增强丙烯酸乳液聚合物改性混凝土的抗压强度在28天后仍能逐渐提高。在新态和硬化态下对混合料进行了测试,以满足SFRPMC的实际和技术要求。采用田口实验设计方法对实验结果进行分析。通过抗压强度、劈裂抗拉强度、弯曲强度和弹性模量来确定最佳的混合比例水平。对测量数据和信噪比进行方差分析(ANOVA)。从田口试验设计的结果中导出的相关性被提出作为估计这些复合材料强度的预测方程。
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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