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.

Ecological slope protecting method

Abstract: The invention provides an ecological slope protecting method. The method includes the steps of a, leveling a to-be-process slope; b, laying lower-layer fertilizer-containing porous concrete; c, spraying a lower-layer water quality purifying layer on the surface of the lower-layer fertilizer-containing porous concrete; d, laying upper-layer reinforcing porous concrete; e, spraying an upper-layer water quality purifying layer on the surface of the upper-layer reinforcing porous concrete; f, filling plant-growing materials in the gaps of the upper-layer reinforcing porous concrete; g, naturally curing. The ecological slope protecting method has the advantages that double-layer structure synergy is used, the sustainable fertilizer efficiency of the ecological concrete can be increased, the water quality purifying capability of the ecological concrete can be enhanced, and slope stability and water flow impact resistance can be increased fast.

Roof greening structure and greening method

Abstract: The invention provides a roof greening structure and a greening method. The roof greening structure comprises a main structure and an auxiliary structure, wherein the main structure comprises a water-proof root-blocking layer, a protection layer, a light-weight aggregate pervious concrete water storage layer, a filter layer, a light nutrient soil layer and a vegetation layer which are paved on the main structure in sequence; the auxiliary structure comprises a water drainage opening, an inspection well, a spare drain opening and an overflow opening; the material, namely light-weight aggregate pervious concrete, of the light-weight aggregate pervious concrete water storage layer is prepared from the following materials by weight: 50 to 80 parts of pumice, 15 to 45 parts of cement, 5 to 15 parts of water, 0.5 to 1.5 parts of a special strengthening agent for pervious concrete, and 0.1 to 0.5 part of a water-retaining agent. The void ratio of the light-weight aggregate pervious concrete water storage layer is equal to or larger than 20 %, can store rainwater of concentrated rainfall, and has the functions of flood detention, storage regulation, flood peak reduction, and initial rainwater purification in a regional scale; due to the large void structure, plant roots can penetrate easily, so that the roof greening structure and the greening method are suitable for planting low shrubs and dwarf trees, and have a good root fixing effect.

Comparative degradation of pultruded E-glass/vinylester in deionized water, alkaline solution, and concrete leachate solution

Abstract: The use of E-glass/vinylester composites, fabricated by processes such as resin infusion and pultrusion involving low-moderate temperature cure regimes, in civil infrastructure applications is increasing. A major consideration in these applications is long-term durability in the presence of aqueous solutions ranging from water to alkaline environments such as would be seen from pore water of concrete in the case of a reinforcing bar in concrete, or from an alkaline rich concrete leachate due to water migrating through porous concrete to the surface of a composite overlay. This study characterizes mass uptake, tensile, and interlaminar shear response of a pultruded E-glass/vinylester immersed in deionized water, alkali solution, and concrete leachate solution for periods up to 75 weeks. The high pH solutions are seen to cause a greater degree of irreversible damage at the resin, interface, and fiber levels. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1405–1414, 2006

Long-Term Field Monitoring and Evaluation of Maintenance Practices for Pervious Concrete Pavement in Vermont

Abstract: Pervious concrete pavement (PCP) is used because of its unique properties that allow water to infiltrate into the surface. The objectives of the study reported in this paper were to observe the performance of PCP in the field, determine the effectiveness of cleaning methods to restore infiltration rates, and compare field observations with laboratory results when possible. Two PCP sites in Vermont were monitored over a year through the measurement of infiltration rates at several locations. Facility-wide cleaning operations, such as street sweeping and vacuum-truck cleaning, were tested for their capability to restore infiltration rates. Spot-cleaning methods, such as hand vacuuming, pressure washing, and a combination of the two, were also tested. Infiltration rates decreased gradually during the monitoring period, with average reductions of 59% at the first facility and 26% at the second. Street sweeping and vacuum-truck cleaning restored infiltration rates by 21% and 30%, respectively, but could not re...

Multi-criteria optimum mixture design of porous concrete pavement surface layers

Abstract: Research has been done to obtain a Porous Concrete (PC) mixture capable of bearing heavy traffic loads while maintaining sufficient air voids (AV) to percolate water into the ground. This research ...