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.

Engineering properties and lifecycle impacts of Pervious All-Road All-weather Multilayered pavement

Abstract: • Developed Pervious All-Road All-weather Multilayered pavement (PARAMpave). • Addressed the concern of inherent low strength of pervious concrete via PARAMpave. • Quantified the reduced environmental impacts of PARAMpave over concrete blocks. • PARAMpave were found to be economical alternatives to conventional paver blocks. Conversion of pervious natural ground into impermeable pavement systems has caused severe environmental impacts such as urban heat islands, increased infrastructure-related greenhouse gas (GHG) emissions and energy consumption, and runoff generation / flashfloods during rainfall events. These phenomena can be addressed with the use of pervious concrete pavement (PCP) systems, which have gained acceptance as sustainable alternatives to conventional materials. However, implementation of PCP technology is limited to low-volume roads, sidewalks, and parking lots attributed to low strength and the need for high quality control during construction compared to traditional pavements along with limited understanding on the end-of-life significance due to the green PCP product. Therefore, the major objective of this research was to develop a pavement system with superior structural and hydrological performance characteristics over traditional PCP, while also quantifying the energy consumed, amount of GHG produced, and costs associated with its design and construction. Thus, a Pervious All-Road All-weather Multilayered pavement (PARAMpave) was conceptualized and designed that comprised a 300 mm square paver block created with a 60 mm lower structural layer overlaid with a 30 mm water-draining surface wearing course pervious concrete layer. The major properties of PARAMpave products included porosity ranging from 17% to 24%, permeability varying from 0.77 cm/s to 1.33 cm/s, and flexural strength between 4.83 MPa and 6.13 MPa, indicating their improved structural and hydrological performance compared to traditional designs. Further, a cradle-to-gate lifecycle approach was utilized to perform a comparative evaluation between PARAMpave and Portland cement concrete (PCC) paver blocks. The PARAMpave products consumed lower energy (8.22% to 8.51%) and emitted lower GHGs (8.23% to 8.43%) compared to PCC blocks of similar dimensions. Additionally, PARAMpave blocks were about 10% cheaper and almost 10% lighter than a PCC paver block. The reduction in GHG emissions, energy consumption, and capital costs indicate that PARAMpave blocks are a sustainable class of roadway products. Also, the strength and permeability magnitudes of PARAMpave indicate that they have high potential for applications in different road classes and diversified weather conditions.

Experimental Investigation of Compressive Strength and Infiltration Rate of Pervious Concrete by Fully Reduction of Sand

Abstract: The aim of the study is to investigate compressive strength of pervious concrete by reduction of fine aggregate from zero to 100%, additionally investigate infiltration rate of pervious concrete. Experimental study has conducted at Cecos Engineering University Peshawar. The pervious concrete samples were produced for 7 and 28 days. Compressive strength of pervious concrete indicated higher reduction of the sand reduces compressive strength and almost 50% compressive strength decreased by reduction of 100% sand from the design mix. On the other side, infiltration rate for 28 days shows direct relation above 40% reduction of sand and highest 273% of infiltration rate by reducing 100% sand from the design mix. The 90% reduction of sand from concrete give considerable compressive strength of 2150 psi and infiltration rate of 165.79 inch/hour, which can be recommended for pavements of parking and walking area.

Greening concrete block and secondary concrete product

Abstract: PROBLEM TO BE SOLVED: To contribute an environmental preservation and greening promotion by greening concrete blocks, basically eliminate their maintenance, reduce cost, and prevent an erosion by flowing water. SOLUTION: The surface of a porous concrete layer 20 is formed in a corrugated surface 23, and a pot part 24 forming a recessed part shape is provided on the surface side of that layer. A potted plant 30 is fitted fixedly to a space 22 and the pot part 24 of the porous concrete layer 20. The entire corrugated surface 23 of the porous concrete layer 20 is covered with a surface layer soil 41. The potted plant 30 is formed by filling soil 32 in a pot 31, and holding the root system of vegetation 33 by the soil 32.

Bioconcrete and bioporous concrete

Abstract: PURPOSE: To produce a bioconcrete capable of improving a water quality purification of an industrial waste water, a domestic waste water, river and sea and preventing an oxidation of a reinforcing bar by an effect of anti-oxidizing force by using a specified microorganisms group as an admixture of a concrete. CONSTITUTION: The useful microorganisms group such as photosynthetic bacterium, yeast, lactobacillus, Aspergillus oryzae is used as an admixture. And a bioporous concrete is obtained by using the useful microorganisms as the admixture of a porous concrete having continuous void. Therefore, this bioconcrete is used for the water quality improvement in various types of septic tanks, a deodorizing for stock raising industry, the improvement in weatherability, for a concrete structure of a park, a structure of river, etc. COPYRIGHT: (C)1996,JPO