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| 摘要: |
| 为了改善聚苯乙烯(EPS)轻集料混凝土中EPS颗粒与水泥砂浆界面的黏结性能,提高EPS轻集料混凝土的力学性能,采用乙烯-醋酸乙烯酯(EVA)乳液对EPS颗粒表面进行改性,并对改性前后EPS轻集料混凝土的力学性能作了对比试验,结合扫描电镜、X射线衍射和红外光谱,分析了EVA乳液对EPS轻集料混凝土性能的影响机理.结果表明:EVA改性改善了EPS轻集料混凝土的微观结构,使其内部孔洞数量减少,孔洞尺寸趋于减小;使水泥水化更为充分,水化产物组成得以优化,EPS轻集料混凝土的180 d抗压强度和抗折强度得到提高. |
| 关键词: EPS轻集料混凝土 EVA改性 微观结构 强度 |
| DOI： |
| 分类号:TU528.2 |
| 基金项目:天津市自然基金资助项目(06YFJMJC05900) |
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| Properties and Microstructures of EPS Lightweight Concrete Modified with EVA |
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ZHAO Xiao-yan TIAN Wen-ling JIANG Xin-liang ZHOU Ming-jie
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| Abstract: |
| In order to improve the combination ability of the expanded polystyrene(EPS) beads and the cement mortar in the EPS lightweight concrete,and the mechanical properties of this concrete,the ethylene-vinyl acetate copolymer(EVA) emulsion was used to modify the EPS surface.Mechanical properties of EPS lightweight concrete were tested;the influence of EVA on EPS lightweight concrete had been analyzed by means of scanning electron microscope(SEM),X-ray diffraction and infrared spectroscopy spectrum.Tests results ... |
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