Cementitious Coatings for Concrete Surfaces: Effects of Curing Conditions on Performance Measure

Ketankumar G. Chitte, J. Narkhede, Ravindra G. Puri, Tushar Deshpande, Mahendra Bari, Ujwal Patil
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Abstract

To increase cohesiveness, toughness, impermeability, and adhesion strength in cementitious materials like mortars and concrete, vinyl acetate ethylene (VAE) copolymer redispersible powder (RDP) is used. However, due to numerous variety of material, choosing an original performing RDP is challenging. The goal of this study is to assess the bond strength to concrete surfaces of various redispersible polymer-modified cementitious coatings under various accelerated settings. The outcomes showed that the RDP backbone composition has a significant influence on the coatings' adhesion strength. Methyl methacrylate (MMA) and Vinyl chloride (VC) present as comonomers in RDP exhibit outstanding thermal stability and boost tensile adhesion strength by 41% and 21%, respectively, in comparison to other RDPs. According to SEM studies, the VC- RDP stimulates the formation of fibrous ettringite, producing a uniform and cohesive microstructure.
混凝土表面的水泥基涂料:固化条件对性能测量的影响
为了提高灰浆和混凝土等水泥基材料的粘聚性、韧性、抗渗性和粘结强度,人们使用了醋酸乙烯酯乙烯(VAE)共聚物可再分散粉末(RDP)。然而,由于材料种类繁多,选择性能优异的可再分散乳胶粉具有挑战性。本研究的目的是评估各种可再分散聚合物改性水泥基涂料在各种加速条件下与混凝土表面的粘结强度。结果表明,RDP 骨架成分对涂料的粘结强度有很大影响。与其他 RDP 相比,RDP 中作为共聚单体的甲基丙烯酸甲酯(MMA)和氯乙烯(VC)具有出色的热稳定性,拉伸附着强度分别提高了 41% 和 21%。根据 SEM 研究,VC- RDP 可促进纤维状乙丁睛的形成,产生均匀且具有内聚力的微观结构。
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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