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Early-age Free Shrinkage of Mortars with Different Dosages of EVA Redispersible Powder

机译：不同剂量EVA可再分散乳胶砂浆的早期收缩

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摘要

The plastic free shrinkage evolutions of mortars in the presence of different dosages of redispersible Ethylene-vinyl acetate (EVA) copolymer powder were measured using the laser sensor at acceleration dry for 6 hours. The effects of temperature, relative humidity, air contents and water evaporation of mortars on the plastic free shrinkage were observed. The plastic free shrinkage of mortars declines firstly and then rise under the increasing dosage of EVA powder in range of l%~10% mass of cement in mortars, the plastic free shrinkage of mortars with 10% EVA powder was almost closed to that of plain cement mortars. The EVA powder facilitates a decrease in plastic free shrinkage of mortars. The linear regression equation between the plastic free shrinkage and its effect factors was set up, and analysis of variance was used to analyze the significant of air content and water evaporation.
机译：使用激光传感器在加速干燥6小时的条件下，测量了在不同剂量的可再分散乙烯-乙酸乙烯酯（EVA）共聚物粉末存在下砂浆的无塑性收缩演变。观察了砂浆的温度，相对湿度，空气含量和水分蒸发对无塑性收缩的影响。在水泥粉质量的1％〜10％范围内，随着EVA粉用量的增加，砂浆的无塑性收缩先下降后增大，含10％EVA粉的砂浆的无塑性收缩几乎接近普通砂浆的无收缩率水泥砂浆。 EVA粉末有助于减少砂浆的无塑性收缩。建立了塑料自由收缩率及其影响因素之间的线性回归方程，并使用方差分析来分析空气含量和水分蒸发的显着性。

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  • 来源
  • 会议地点 Shanghai(CN)
  • 作者

    LIU Sifeng; WANG Peiming;

  • 作者单位

    Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Jiading District, Shanghai 201804, China;

    Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Jiading District, Shanghai 201804, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Early-age; Plastic free shrinkage; Redispersible EVA powder; Analysis of variance;

    机译：早年;无塑料收缩；可再分散乳胶粉；方差分析;

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