基于骨架原则的再生骨料多孔混凝土配合比设计方法探讨

发布时间：2018-05-01 05:23

本文选题：工厂化再生骨料 + 多孔混凝土　；参考：《中外公路》2017年02期

【摘要】：通过试验与设计研究,提出一种以骨架原则设计的、适用于再生骨料多孔混凝土配合比设计的新方法。再生骨料以饱和面干状态为基准,参考ATPB-25开级配沥青稳定碎石排水基层的级配范围,按照骨架-空隙结构设计再生粗骨料级配;依据再生骨料多孔混凝土设计的目标空隙率,采用体积法计算单位水泥用量、用水量、再生骨料用量。对于C20再生骨料多孔混凝土的配合比设计,当目标空隙率为15%,坍落度为10~20 mm时,水灰比为0.30,砂率选取8%为宜,且C20再生骨料多孔混凝土的试验室配合比为水泥∶水∶饱和面干再生骨料A∶饱和面干再生骨料B(4.75mm)∶再生骨料B(4.75mm)∶砂=274∶82∶1 101∶493∶62∶136。
[Abstract]:Through experimental and design research, a new design method based on skeleton principle is proposed, which is suitable for the mix design of recycled aggregate porous concrete. Based on the dry state of saturated surface and referring to the gradation range of ATPB-25 open graded asphalt stabilized macadam drainage base, the recycled aggregate gradation is designed according to the skeleton and void structure, and the target void ratio of recycled aggregate porous concrete is obtained. Volume method was used to calculate the amount of unit cement, water consumption and recycled aggregate. For the mix design of C20 recycled aggregate porous concrete, when the target porosity is 15, the slump is 10 ~ 20 mm, the water-cement ratio is 0.30, and the sand ratio is 8%. And the laboratory mix ratio of C20 recycled aggregate porous concrete is cement: water: saturated surface dry recycled aggregate A: saturated surface dry recycled aggregate B 4. 75 mm / m: sand 274: 82: 1 101: 4 933: 62: 136.
【作者单位】：山东高速路桥集团股份有限公司;山东省高速路桥养护有限公司;山东交通学院山东省高校路面结构与材料重点实验室;
【基金】：山东省交通运输厅科技创新项目(编号:2014B16)
【分类号】：U414

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