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Effect of low dosages of waste GRP dust on fresh and hardened properties of mortars: Part 2

机译：低剂量玻璃钢废粉对砂浆的新鲜和硬化性能的影响：第2部分

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摘要

Part 1 of the work reported that by replacing 5-10% of sand volume with GRP dust, workability, autoge-neous shrinkage, deformability and total porosity, though with a smaller average radius, of mortars increased, thereby reducing significantly the mechanical performance, when wet curing conditions are adopted. However, the risk of cracking induced by restrained shrinkage and the capillary water absorption is lower in the presence of GRP dust, leading to enhanced durability of GRP mortars when used as supporting role. Therefore, in the present work, plaster mortars manufactured by replacing 0-2.5-5% of sand volume with GRP dust were characterized. For comparison, the addition of an hydrophobic admixture at different dosages was also considered. Permeability is not significantly reduced by the low addition of GRP dust, but it is slightly 'increased by silane addition. Thermal insulation properties, capillary water absorption and resistance to efflorescence are better with waste GRP dust addition, especially when combined with silane.
机译：该工作的第1部分报告说，通过用GRP灰尘代替砂体积的5-10％，砂浆的可加工性，自发收缩，变形性和总孔隙度（虽然平均半径较小）增加了，从而显着降低了机械性能，当采用湿固化条件时。但是，在存在GRP灰尘的情况下，收缩受到限制以及毛细管吸水会导致开裂的风险较低，从而在用作支撑剂时会提高GRP砂浆的耐久性。因此，在目前的工作中，表征了通过用GRP粉尘代替0-2.5-5％的砂体积制造的灰浆。为了进行比较，还考虑了添加不同剂量的疏水性混合物。少量添加GRP粉尘并不会显着降低渗透率，但是添加硅烷会略微提高渗透率。添加废玻璃纤维增​​强粉尘后，尤其是与硅烷结合使用时，隔热性能，毛细吸水率和抗起霜性会更好。

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  • 来源
    《Construction and Building Materials》 |2013年第10期|1539-1543|共5页
  • 作者

    Francesca Tittarelli;

  • 作者单位

    Department of Science and Engineering of Matter and Environment and Urban Planning (SIMAU), Universita Politecnica delle Marche, 60131 Ancona, Italy, INSTM, Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, Via Giusti 9,50121 Florence, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mortar; Class reinforced plastic waste; Recycling; Durability;

    机译：砂浆;类增强塑料废料;回收;耐用性;

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