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 paper, a randomized complete block was constructed near the wastewater treatment plant of Isfahan University of Technology, and the concrete blocks were made, put on the channel and biofilm processing operations were conducted on the pores of porous concrete cubes.
Abstract: In recent years, due to the overpopulation, serious water shortages, and need to consume more water, the use of wastewater treatment plant has attracted lots of attention. When the pollution load is not high, biofilm reactors are commonly used for the purpose. In this study, the porous concrete as a bed biofilm in reducing pollution load of wastewater was investigated. In order to evaluate porous concrete, basic mix designs were selected according to regulations ACI211.3R. To increase the specific surface area of concrete for biofilm growth, fine particles were added to the basic mix in three stages with each stage 10% by weight of coarse particles. Experimental design was a randomized complete block. A rectangular channel (with the cross section 20×30 cm) and 8 meters in length was constructed near the wastewater treatment plant of Isfahan University of Technology. Then, the concrete blocks were made, put on the channel and biofilm processing operations were conducted on the pores of porous concrete cubes. Qualitative tests for BOD, COD, TSS and total coliform of samples from wastewater inflow and outflow were performed. Results showed that the removal of these parameters increased by adding fine particles. The average removal rates of BOD, COD, TSS and total coliform for the first mix design (1400 kg per cubic meter of coarse particle and without fine sand) were 25%, 33%, 45% and 37%, respectively. Similarly, the average removal rates of BOD, COD, TSS and total coliform for the fourth mix (1400 kg per cubic meter of coarse particle and 420 kg per cubic meter of fine sand) were 36%, 40%, 57% and 81%, respectively. It could be concluded that porous concrete can be used as a bed biofilm, and the third mix design (1400 kg per cubic meter of coarse particle and 280 kg per cubic meter of fine sand) was the best mix design.
6 citations
01 Jan 2018
TL;DR: In this article, a porous concrete mixture was successfully designed and surpassed the minimum requirements required by Directorate General of Highways [11] and it was found that there was very strong correlation between void content and permeability which created fine likelihood to use void content to represent porous concrete permeability behavior.
Abstract: Base layer with grained material tend to occur in saturated condition at the moment of rainfall or after rainfall. In that condition, the present of traffic might also create movement below the foundation layer and reduce its bearing capacity. Nevertheless, the foundation material that contain large fine creates base layer with low permeability and slow water movement. This paper presented the procedure and result of laboratory experimental study to obtain basic property criteria for rigid pavement base layer.The porous concrete mixture was successfully designed and surpassed the minimum requirements required by Directorate General of Highways [11] [12]. It was found that there was very strong correlation between void content and permeability which created fine likelihood to use void content to represent porous concrete permeability behavior. High void content with good connection resulting weaker aggregate interlocking inside the mixture so that permeability rose whereas compressive strength fell. Solid fresh density and more filled by cement paste created a smaller void that would reduce permeability and improve compressive strength. Strong correlation between fresh density towards void content and permeability opened potency to use the fresh density as a reference to set the desired porous concrete void content on the field.
6 citations
TL;DR: In this paper, the strength enhancement of No-fine concrete using waste material (i.e. coir fiber) and nano-graphene derivatives was investigated, and a series of mechanical and hydraulic experiments were conducted to characterize the properties of modified Nofine concrete matrix and optimized dosages were identified to yield the expected behaviour as required by relevant standards.
6 citations
TL;DR: In this paper , the pervious concrete is proportioned by introducing a parameter of filling ratio, and the influences of the filling ratio and W/C ratio on compressive strength and permeability are investigated.
6 citations
Patent•
12 Mar 2008
TL;DR: A pavement method of a high durability permeable concrete pavement material is provided to increase binding strength of a base layer and a surface layer, to prevent lowering of strength, contraction and crack formation of concrete and to have excellent strength and durability.
Abstract: A pavement method of a high durability permeable concrete pavement material is provided to increase binding strength of a base layer and a surface layer, to prevent lowering of strength, contraction and crack formation of concrete and to have excellent strength and durability. A pavement method of a high durability permeable concrete pavement material comprises the steps of: preparing recycled aggregate or crushed aggregate for a base layer; preparing permeable concrete for a base layer by mixing 5~30 weight percent binder to 70~95 weight percent recycled aggregate or crushed aggregate for a base layer; forming a base layer by paving and tamping the permeable concrete for a base layer; preparing recycled aggregate or crushed aggregate for a surface layer; preparing permeable concrete for a surface layer by mixing 5~30 weight percent binder and 2~5 weight percent paints to 65~93 weight percent recycled aggregate or crushed aggregate for a surface layer; and forming a surface layer by paving and tamping the permeable concrete for a surface layer, and coupling the permeable concrete for a surface layer to surface gaps of the base layer, wherein the binder used for the permeable concrete for the base layer and the permeable concrete for the surface layer is composed of 40~68 weight percent portland cement, 5~25 weight percent auxiliary binder, 0.03~0.3 weight percent pozzolan polymer stearate, 25~35 weight percent water and 0.00025~0.0105 weight percent high absorptive resin.
6 citations