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Effect of an enhanced rubber-cement matrix interface on freeze-thaw resistance of the cement-based composite

机译：增强的橡胶-水泥基体界面对水泥基复合材料抗冻融性的影响

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Bond defects at rubber-cement matrix interface are detrimental to durability of the cement composite. Therefore, coating rubber aggregates with copolymer has been suggested to overcome this defect. This paper aims to investigate the effect of an improved rubber-cement matrix bond on frost resistance. Freeze-thaw temperature cycles were controlled by a thermal sensor embedded inside the core of a mortar specimen. Measurements of relevant quantities, such as mass loss, length change, mechanical properties (relative dynamic modulus of elasticity, compressive and flexural strengths), and durability factor, demonstrated that rubberized cement-based materials were more resistant under freeze-thaw environments than the control one. Especially, regardless of slight length gain of mortar incorporating coated rubber aggregates, copolymer coating still made the composite durable in frost conditions owing to its improved strain capacity and higher residual post-peak tensile strength. (C) 2019 Elsevier Ltd. All rights reserved.
机译：橡胶-水泥基体界面的粘结缺陷不利于水泥复合材料的耐久性。因此，已经建议用共聚物涂覆橡胶聚集体以克服该缺陷。本文旨在研究改进的橡胶－水泥基质粘结对抗冻性的影响。冻融温度循环是通过嵌在砂浆样本芯内部的热传感器控制的。对相关量的测量，例如质量损失，长度变化，机械性能（相对动态弹性模量，抗压和抗弯强度）和耐久性因数，表明橡胶水泥基材料在冻融环境下比对照组更耐一。尤其是，不管掺入涂覆的橡胶骨料的砂浆的长度略有增加，共聚物涂层由于其改进的应变能力和较高的峰后残余拉伸强度而仍使该复合材料在霜冻条件下具有耐久性。 （C）2019 Elsevier Ltd.保留所有权利。

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