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Physicochemical characterization of polymer composite cement systems

机译：聚合物复合水泥系统的物理化学表征

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摘要

The early hydration behaviour of two different polymer composites cement systems (PCCS) that hypothetically affects efflorescence has been investigated through physicochemical characterization namely Puddle Test (PT), Standard Chemical Method (SCM), Compressive Strength Test (CS), X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). PCCS mortar samples were prepared with water-to-cement ratio (w/c) of 0.50. Commercially available polymer additives namely Styrene Butadiene Rubber (SBR) and Styrene Acrylic Ester (SAE) with different percentages of addition of 5%, 7% and 10% to cement were used. All samples were dried cured and tested at day 28. Efflorescence was accelerated by using PT. Its intensity, in terms of the amount of Calcium Carbonate (CaCO_3) precipitated on samples' surfaces, was quantified by using SEM. Results of the PCCS were then compared to the conventional cement system. Based on this study, PCCS can potentially reduce efflorescence where validation from CS, XRD analysis and SEM images showed that the evidence of the pore blocking effects of PCCS in early hydration hence can indirectly improve concrete durability and sustainability.
机译：两种不同的聚合物复合材料的早期水合行为通过物理化学表征来研究浮肿（PT），标准化学方法（SCM），压缩强度试验（CS），X射线衍射（ XRD）和扫描电子显微镜（SEM）。用0.50的水 - 水泥比（W / C）制备PCCS砂浆样品。市售的聚合物添加剂即苯乙烯丁二烯橡胶（SBR）和苯乙烯丙烯酸酯（SAE），使用不同百分比的加入5％，7％和10％的水泥。将所有样品干燥固化并在第28天测试。通过使用Pt加速了苔藓。就样品表面沉淀的碳酸钙（Caco_3）的量而言，其强度通过使用SEM量化。然后将PCCS的结果与传统水泥系统进行比较。基于这项研究，PCC可以潜在地减少CS，XRD分析和SEM图像验证的兴趣，显示PCCS在早期水合中的孔隙阻断效应的证据可以间接地改善混凝土耐久性和可持续性。

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