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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Patent•
08 May 2013
TL;DR: In this article, a water permeable rate test method for a water-permeable concrete pavement is proposed, which is based on measuring the descent height of a water column in a measuring cylinder and the required time.
Abstract: The invention discloses a water permeable rate test method for a water-permeable concrete pavement, which comprises the following steps: firstly, arranging a water permeable rate test device on a water-permeable concrete pavement to be tested, and ensuring that a base is tightly connected with the water-permeable concrete pavement to be tested in the contact area; secondly, opening a valve on a water outlet pipe, enabling water in a measuring cylinder to flow into a flared groove, contact water-permeable concrete and then permeate the water-permeable concrete so as to cause the height of a water column in the measuring cylinder to descend, and recording the descent height of the water column in the measuring cylinder and the required time; and finally, calculating the water permeable rate of the water-permeable concrete pavement according to a formula K=(h2-h1)/(t1-t2), wherein K is the water permeable rate of the water-permeable concrete pavement and has a unit of mm/s; t2 is a time when the water column in the measuring cylinder descends from the original scale H to a first scale h2; and t1 is a time when the water column in the measuring cylinder descends from the original scale H to a second scale h1. According to the invention, the water permeable rate of a laid water-permeable concrete pavement can be accurately calculated by recording the descent height of the water column in the measuring cylinder and the required time.
6 citations
01 Sep 2017
TL;DR: In this paper, the authors have done the research on the measurement of the specific surface area of aggregate, and also the volume change of cement after hydration, and the best water-binder ratio and thickness of gelled material package.
Abstract: The purpose of this paper is to solve the shortcoming of the mix proportion of pervious concrete. So we have done the research on the measurement of the specific surface area of aggregate, and the research on the volume change of cement after hydration, and the research on the best water-binder ratio and thickness of gelled material package. The experimental results show that the equivalent method is more accurate for measuring the specific surface area of aggregate. It can better reflect the specific surface area of aggregate. Moreover, the calculation method of the mix proportion of the cementing material can improve the utilization ratio of material and the quality of pervious concrete.
6 citations
TL;DR: In this article, the runoff purification effects of permeable concrete modified by diatomite and zeolite powder were studied, and the optimal dosages of modified diatomites and Zeolite powders were suggested to improve the compressive strength, effective porosity, purification effect, and environmental scanning electron microscopy (ESEM) tests.
Abstract: Diatomite and zeolite powder exhibit cellular structures that are beneficial to absorb pollutants in road surface runoff. In this work, the runoff purification effects of permeable concrete modified by diatomite and zeolite powder were studied. First, magnesium dihydroxide was used to modify diatomite; then the modified diatomite and the zeolite powder were innovatively adopted as binders to prepare permeable concrete. In addition, compressive strength, effective porosity, purification effect, and environmental scanning electron microscopy (ESEM) tests, as well as gray correlation analysis, were carried out. Finally, the optimal dosages of modified diatomite and zeolite powder in permeable concrete were suggested. The results show that diatomite (modified diatomite) and zeolite powder can improve the compressive strength, effective porosity, and runoff purification effects of permeable concrete. In addition, the 10% modified diatomite and the 3% zeolite powder exhibit the highest correlation with the properties of modified permeable concrete.
6 citations
Patent•
03 Feb 2016
TL;DR: Wang et al. as discussed by the authors proposed a sponge body double-waste pervious concrete pavement, which consists of a surface layer, connecting layer, a base and a cushion.
Abstract: The invention discloses a novel sponge body double-waste pervious concrete pavement. The pavement comprises the following layers in order: a surface layer, a connecting layer, a base and a cushion. The connecting layer is sponge body garden waste mortar; the base is novel sponge body double-waste pervious concrete; the sponge body garden waste mortar comprises cement, sand and garden waste; the novel sponge body double-waste pervious concrete comprises cement, sand, garden waste, regenerated stones and a brightener. The sponge body double-waste pervious concrete pavement solves the city garden waste pollution problem, changes waste into valuables, and is good for environmental protection; the pavement has the advantages of water imbibition, water penetration, water storage, permeability and higher strength; the garden waste can be collected conveniently, and concrete, mortar and other materials are saved, so that the pavement is economical.
6 citations
TL;DR: In this article, a Portland cement pervious concrete (PCPCPC) was designed for flatwork and pavement applications. But, the results showed a high capacity of drainage with acceptable mechanical properties for PCPC designed with various combinations of natural aggregate.
6 citations