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首页> 外文期刊>Open Journal of Civil Engineering >Influence of CDW Recycled Aggregate on Drying Shrinkage of Mortar
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Influence of CDW Recycled Aggregate on Drying Shrinkage of Mortar

机译:CDW再生骨料对砂浆干缩的影响

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摘要

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.
机译:在砂浆生产中使用精细的再生骨料作为原材料似乎是减少废物处置,减少自然资源消耗并寻找和提供合适的天然骨料替代品的好选择。但是,必须通过对其长期行为的广泛研究来以安全的方式使用这种替代材料。通过这种方式,本文将研究砂浆的机械强度,物理性能和干燥收缩率,这些砂浆使用的再生细骨料来自含砂浆(55%),陶瓷(26%)的建筑和拆除废物(CDW)。和混凝土(16%)。生产了两种由天然砂制成的天然砂浆,其水泥/砂比为1:4和1:8(按重量计),固定稠度指数为260 +10 mm。再生砂浆的产量为天然骨料的替代率(体积比)为50%。结果表明,再生砂浆比参考砂浆具有更高的总孔隙率,吸收率和干燥收缩率。

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