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Study on the Microstructure of RFA Cement Mortar after Modification

机译：修饰后RFA水泥砂浆微观结构研究

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The microstructures of fine recycled concrete aggregate (FRCA) after modifications in cement mortar were studied. The result indicated that the modification of RFA could strengthen the enhancement effect on microstructure when modified by 20wt% silica fume (SF) grout, 10wt% Polyvinyl alcohol (PVA) solution. After modification by SF grout and PVA solution, the thickness of interfacial transition zone (ITZ) of RFA cement mortar was decreased by 50% compared with the unmodified samples. The ITZ between RFA and cement paste was studied and the surface microstructure and sectional morphology of RFA was observed by scanning electron microscopy (SEM). Analyzing the modification mechanism and Building the superficial micro-structure model of RFA in cement mortar was carried out.
机译：研究了水泥砂浆修饰后细循环混凝土骨料（FRCA）的微观结构。结果表明，当通过20wt％二氧化硅烟灰（Sf）植物（SF）植物（SF）植物（10wt％聚乙烯醇（PVA）溶液改性时，RFA的改性可以增强对微观结构的增强效果。通过SF植物和PVA溶液进行修饰后，与未修饰的样品相比，RFA水泥砂浆的界面转变区（ITZ）的厚度降低了50％。研究了RFA和水泥糊之间的ITZ，并通过扫描电子显微镜（SEM）观察RFA的表面微观结构和截面形态。进行了修饰机制，进行了水泥砂浆RFA浅层微结构模型。

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