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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TL;DR: In this article, a novel method for the extraction of concrete pore fluid was devised at the University of Ulster, which is presented and discussed in detail in Section 2.1.
Abstract: Concrete has an intricate pore structure comprising pores and voids. The pore fluid is held within the pore structure of the concrete and provides the transport mechanism for aggressive ions, such as chloride ions. Pore fluid analysis is the most representative and accurate method of analysis for the investigation of ion ingress, ion egress and related phenomena. The micro-techniques necessary for evaluating the ion concentrations contained in the small amounts of fluid obtained are well established. The traditional method for the extraction of concrete pore fluid involves crushing the concrete at high tri-axial pressures (> 400 N/mm2) in specially constructed pore fluid expression devices. A novel method devised at the University of Ulster is presented and discussed.
6 citations
31 Jul 2013
TL;DR: In this paper, the physical, mechanical, water purification and temperature properties of fiber reinforced porous green roof concrete have been evaluated in a study where polyvinyl alcohol fiber was used for the reinforcing fiber.
Abstract: The physical, mechanical, water purification and temperature properties of fiber reinforced porous hwang-toh green roof concrete have been evaluated in this study. The effect of the depending on replacement ratio of blast furnace slag to cement was investigated such that the replacement ratio is varied to 0 % and 30 %. Also, the replacement ratios of hwang-toh were 0, 20 and 30 %. The polyvinyl alcohol fiber was used for the reinforcing fiber. A series of pH test, unit weight, void ratio, compressive strength, after purification and variation of temperature test have been performed to evaluate the performance, water purification effect and temperature properties of the fiber reinforced porous hwang-toh green roof concrete. The test results indicate that the physical and mechanical properties of fiber reinforced porous hwang-toh green roof concrete is affected by the replacement ratio of the blast furnace slag and hwang-toh contents. Results of purifying water showed that the water purification effect of porous hwang-toh green roof concrete is about 40 %. Also, the temperature properties test results indicate the green roof blocks using fiber reinforced porous hwang-toh green roof concrete have insulation and temperature reduction effect.
6 citations
Patent•
10 Apr 2012
TL;DR: In this paper, a pervious concrete system consisting of a coarse pervious layer, a binder layer and a decorative layer is described, which may be at least partially exposed.
Abstract: Various embodiments of a system and method of forming a decorative pervious concrete system are generally described. In some embodiments, the pervious concrete system comprises a coarse pervious layer, a binder layer, a decorative pervious layer and a decorative layer sealer. In some embodiments, the decorative pervious layer comprises a decorative aggregate which may be at least partially exposed.
6 citations
Patent•
17 Aug 2018
TL;DR: In this article, a method for preparing green pervious concrete by using tailings is described, characterized in that the green previous concrete is prepared from the following raw materials in parts by weight: 50 to 70 parts of aggregate, 20 to 30 parts of 52.5 Portland cement, 15 to 20 parts of ceramsite, 1 to 2 parts of efficient water reducing agent, 0.1 to 0.5 part of composite early strength agent and 0.
Abstract: The invention relates to a method for preparing green pervious concrete by using tailings, characterized in that the green pervious concrete is prepared from the following raw materials in parts by weight: 50 to 70 parts of aggregate, 20 to 30 parts of 52.5 Portland cement, 15 to 20 parts of ceramsite, 1 to 2 parts of efficient water reducing agent, 0.1 to 0.5 part of composite early strength agent, 0.1 to 1 part of composite retarder, 0.02 to 0. 1 part of defoaming agent, and 0.02 to 0.1 part of air entraining agent; the aggregate comprises tailings and machine-made sand, the tailings have aparticle size of 5 to 10 mm, the machine-made sand has a particle size of 1 to 5 mm, and the weight ratio of the tailings to the machine-made sand is (3 to 5) to 2. According to the green pervious concrete provided by the invention, the tailings and the ceramsite are adopted as the aggregate, and the gradation of the aggregate and the composition and the quality of an admixture are adjusted, so that the strength, the durability, the water permeability and the freeze-thaw resistance of the pervious concrete are greatly improved.
6 citations
Patent•
19 Aug 2015
TL;DR: In this paper, an industrial waste residue-doped water-permeable concrete and a production method for its production is described, where the raw materials above are subjected to a series of operation such as stirring, vibrating, and pressing so as to obtain the industrial waste residues-based water permeability concrete at last.
Abstract: The invention discloses an industrial waste residue-doped water-permeable concrete and a production method thereof, and belongs to the technical field of concrete. The industrial waste residue-doped water-permeable concrete comprises, by mass, 20 to 30 parts of fly ash, 5 to 12 parts of silica fume, 10 to 15 parts of acetylene sludge, 25 to 35 parts of cement, 270 to 290 parts of a gap-graded aggregate, 23 to 28 parts of water, and 0.8 to 1.2 parts of a water reducer. According to the production method, the raw materials above are subjected to a series of operation such as stirring, vibrating, and pressing so as to obtain the industrial waste residue-doped water-permeable concrete at last. The industrial waste residue-doped water-permeable concrete is excellent in permeability performance and freezing resistance, high in compressive strength, excellent in durability, and low in cost.
6 citations