This study evaluated engineering properties, cost, and energy and environmental impacts of three pervious concrete mixtures: pervious concrete with regular Portland cement (PC-Regular); with fly ash (PC-FA); and with blast furnace slag (PC–BFS). Laboratory tests were conducted to measure mechanical strength, hydraulic conductivity, and freezing-thaw resistance of mixtures. Life-cycle assessment (LCA) approach was used to quantify greenhouse gas (GHG) emission and energy consumption of pervious concrete mixtures with different material compositions. Mass and economic allocation methods were applied to quantify the effects of allocation on impact assessment of fly ash and slag. Laboratory test results show that as compared to the regular pervious concrete, pervious concrete mixtures with slag or fly ash had the similar freeze-thaw resistance but the lower mechanical strength, especially in tensile or flexural strength. The hydraulic conductivity of pervious concrete mixtures with fly ash and slag was found slightly higher due to the larger air void ratios. The choice of allocation methods was found to have significant effect on the assessment results. The adoption of economic allocation method showed 6–9% lower energy saving and 11–19% GHG emission reduction as compared to the mixture with Portland cement. The overall performance of each pervious concrete mixtures was quantified through internal normalization and the area covered in the radar diagram. The pervious concrete with fly ash exhibited the highest overall performance considering the balance of multiple-criteria in engineering properties, cost saving, energy and GHG reduction.

中文翻译：

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粉煤灰和矿渣透水混凝土的工程性能和环境影响评价


本研究评估了三种透水混凝土混合物的工程性能、成本以及能源和环境影响：普通波特兰水泥透水混凝土（PC-Regular）；含粉煤灰（PC-FA）；以及高炉矿渣 (PC-BFS)。进行实验室测试以测量混合物的机械强度、导水率和抗冻融性。采用生命周期评估（LCA）方法来量化不同材料成分的透水混凝土混合物的温室气体（GHG）排放和能源消耗。采用质量和经济分配方法来量化分配对飞灰和炉渣影响评估的影响。实验室试验结果表明，与普通透水混凝土相比，矿渣或粉煤灰透水混凝土混合物具有相似的抗冻融性能，但机械强度较低，特别是拉伸或弯曲强度。由于空隙率较大，掺有粉煤灰和矿渣的透水混凝土混合物的水力传导率略高。研究发现，分配方法的选择对评估结果有显着影响。采用经济分配方法，与硅酸盐水泥混合料相比，节能6%~9%，温室气体减排11%~19%。每种透水混凝土混合物的整体性能通过内部归一化和雷达图覆盖的面积进行量化。考虑到工程性能、节约成本、能源和温室气体减排等多重标准的平衡，粉煤灰透水混凝土表现出最高的综合性能。