Influence of CDW Recycled Aggregate on Drying Shrinkage of Mortar
Influence of CDW Recycled Aggregate on Drying Shrinkage of Mortar
复制标题
CDW再生骨料对砂浆干燥收缩的影响
DOI：
10.4236/ojce.2012.22009
复制
发表时间：
2012
期刊：
影响因子：
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通讯作者：
M. B. Leite
中科院分区：
文献类型：
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作者：
P. L. Lima;M. B. Leite
使用细再生骨料作为砂浆生产的原材料似乎是一种很好的替代方案，可以最大限度地减少废物处理，从而减少自然资源消耗，并找到和供应天然骨料的合适替代品。然而，必须通过对其长期行为的广泛调查来安全地使用这种替代材料。通过这种方式，本文将检测砂浆的机械强度、物理性能和干燥收缩，砂浆使用的再生细骨料源自建筑和拆除废物（CDW），其中含有砂浆（55%）、陶瓷（26%）和混凝土（16%）。两种天然砂浆由天然砂制成，水泥/砂的比例为1:4和1:8（重量比），固定稠度指数为260±10毫米。再生砂浆的生产量，再生砂浆对天然骨料的替代率为50%。结果表明，再生砂浆的总孔隙率、吸收率和干燥收缩率均高于参考砂浆。
The use of fine recycled aggregates as raw material in the production of mortars appears as a good alternative to minimize waste disposal, so as to reduce natural resources consumption and to find and supply suitable substitutes for natural aggregates. However, the use of this alternative material in a safe way must be carried out by a wide investigation of its long term behavior. In this way, this paper will examine the mechanical strength, physical properties and drying shrinkage of mortar, which use recycled fine aggregates that have originated from construction and demolition waste (CDW) containing mortar (55%), ceramic (26%) and concrete (16%). Two natural mortars, made with natural sand, were produced with cement/sand ratios of 1:4 and 1:8 (by weight) and a fixed consistency index of 260 +10 mm. Recycled mortar was produced with 50% of substitution rate, in volume, of natural aggregate by recycled one. Results show that recycled mortars present higher total porosity, absorption rate and drying shrinkage than reference mortar.