Topic
Pervious concrete
About: Pervious concrete is a research topic. Over the lifetime, 2920 publications have been published within this topic receiving 27720 citations. The topic is also known as: porous concrete & permeable concrete.
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01 Feb 2022
TL;DR: In this article , the authors conducted a life cycle assessment (LCA) and multi-criteria assessment of pervious concrete pavement with the use of fly ash, and the results showed that the environmental impacts were mainly generated from material stage in terms of 81% to 92% GHG emissions and 70% to 83% energy consumption.
Abstract: Pervious concrete pavement has great potential in reducing surface water runoff and improving water quality. This study aims to conduct life cycle assessment (LCA) and multi-criteria assessment of pervious concrete pavement with the use of fly ash. The research significance lies in the integration of hydraulic and structure designs for developing functional unit of pervious concrete pavement and combining environmental impacts with engineering and economic indicators. A full LCA of pervious concrete pavement system was conducted including the stages of material, construction, transportation, use, maintenance, and end-of-life stage. The impact assessment included global warming potential, energy consumption, and eutrophication potential due to runoff purification. The pervious concrete pavement structures were designed based on mechanical properties of mixtures, hydrological requirement of reservoir layer, and subgrade soil type to meet equivalent performance on parking lot and highway shoulder. Multi-criteria analysis of pervious concrete mixes and pavement systems were presented based on the normalization of environmental impacts, engineering performances, and economic costs. The LCA results showed that the environmental impacts of pervious pavement system were mainly generated from material stage in terms of 81% to 92% GHG emissions and 70% to 83% energy consumption. The performance rankings of pervious concrete mixes were different from those of pervious pavement structures. The pervious concrete pavement with fly ash can cause greater or less environmental impact, depending on mechanic properties of pervious concrete and the required surface layer thickness to achieve equivalent structural performance.
17 citations
TL;DR: A pollution control pit was developed with a hydrodynamic separator and a multistage filter made of coated porous concrete that treats runoff at source and protects soil, groundwater and receiving waterways.
17 citations
TL;DR: In this article, an optimum design of porous concrete was determined using a step filling and orthogonal test method, and the relationship between the porosity and the connected porosity of the porous concrete of the pavement was analyzed.
Abstract: The aim of the study was to solve the problem of drainage stability of pavement base in cold and Cloudburst area. With porous concrete as the research object, an optimum design of porous concrete was determined using a step filling and orthogonal test method, and the relationship between the porosity and the connected porosity of the porous concrete was analyzed. Furthermore, drainage performance and frost resistance of the pavement, compressive strength of the porous concrete, bending strength, and compressive elastic modulus were studied. The results show that the effects of water-cement ratio on the strength of porous concrete based on the step filling method are the most significant. In addition, the connected porosity and goal porosity have a good linear relationship; that is, the drainage performance increases with the increase in connected porosity, whereas the frost resistance, compressive strength, flexural tensile strength, and compressive elastic modulus decrease with the increase in connected porosity. Based on an engineering project in Inner Mongolia (in China), it was shown that porous concrete with a goal porosity of 15% used as a pavement base could meet the requirements of cold weather, showers, and heavy traffic.
17 citations
TL;DR: In this paper, a laboratory investigation has been conducted aimed at identifying the composition and the properties of pervious concrete satisfying the above requirements, and the results of these tests are reported in the paper.
17 citations
Patent•
02 Dec 2009
TL;DR: In this paper, a nano photocatalysis porous concrete product and a preparation method thereof is provided. But the method is not suitable for use in air purification treatment or water treatment.
Abstract: The invention provides a nano photocatalysis porous concrete product and a preparation method thereof. The nano photocatalysis porous concrete product is prepared by the method comprising the following steps: curing press formed porous concrete for 1 to 7 days, then soaking the porous concrete in nano TiO2 dispersion liquid of which the mass concentration is between 2 and 10 percent for 1 to 5 minutes, and taking out the cured porous concrete to obtain the nano photocatalysis porous concrete product. The nano photocatalysis porous concrete product has the following main advantages: (1) compared with dense concrete, the nano photocatalysis porous concrete product has a larger contact area between the nano photocatalysis porous concrete product and polluted gas or liquid, has high photocatalysis efficiency, and can be applied to air purification treatment or water treatment; and (2) compared with P25, the nano photocatalysis porous concrete product adopts the P25 doped with nano titanium dioxide powder to have higher photocatalysis Nox degradation efficiency.
17 citations