Showing papers on "Pervious concrete published in 2019"
TL;DR: In this paper, the authors investigated the influence of different factors including RM content, the sodium hydroxide to silicate (Na2O/SiO2) mole ratio, and the alkali concentration of the activator on the mechanical properties and ability of adsorbing heavy metal ions.
136 citations
TL;DR: In this article, a silane polymer emulsion treatment method was used to promote the strength of pervious concrete while maintaining its permeability, and the results revealed that silane treatment significantly improved the strength while maintaining acceptable permeability due to the redistribution of the cement paste.
129 citations
TL;DR: In this article, an eco-friendly pervious concrete (PC) product using waste glass cullet (WGC) and recycled concrete aggregate (RCA) by dry-mixed compaction technique was designed.
123 citations
TL;DR: In this article, an evolved support vector regression (ESVR) tuned by beetle antennae search (BAS) was proposed to accurately and effectively predict the permeability coefficient (PC) and 28-day unconfined compressive strength (UCS) of pervious concrete.
98 citations
TL;DR: In this article, the mechanical and hydraulic characteristics of pervious concrete incorporating copper slag coarse aggregate were investigated, and seven main mixes including 0, 20, 40, 50, 60, 80, and 100% replacement of dolomite aggregate with copper slags were considered in this study.
96 citations
TL;DR: In this article, fly ash and metakaolin were used as partial replacement for OPC with curing condition as another variable, and basic tests such as porosity, density, compressive strength, and permeability were conducted to determine the effect of test variables.
94 citations
TL;DR: In this article, the authors identify the pores characteristics in pervious concrete by 2D/3D CT images and investigate the relationship between pores characteristics and permeability, based on CT imaging technology.
94 citations
TL;DR: In this paper, the properties of pervious concrete made with recycled concrete aggregates (RCA) were investigated, and the results showed that the RCA replacement led to an increase in total void content, porosity, and permeability, while a decrease in slump and hardened density.
80 citations
TL;DR: In this article, the authors presented an adequate experimental investigation on the influences of the cement-aggregate ratio (C/A, by mass) on porosity, compressive strength of pervious concrete samples and determined an optimum C/A for higher compressive power.
79 citations
TL;DR: In this paper, the authors focused on the relationship among aggregate size, compressive strength, pore structure, and cementitious paste thickness, and then understand the influence of aggregate size on the compressive strengths of pervious concrete.
78 citations
TL;DR: In this paper, the authors investigated the potential of using high-conductivity permeable concrete pavement in alleviating urban heat island (UHI) effect in both dry and wet conditions.
TL;DR: In this article, the authors evaluated engineering properties, cost, and energy and environmental impacts of three pervious concrete mixtures: perviouscrete with regular Portland cement, with fly ash and slag, and with blast furnace slag (PC-BFS).
TL;DR: In this article, the pore size and geometry properties of pervious concrete have been analyzed to determine whether clogging particles can block or pass through the pores or not, which is closely related to the clogging degree.
TL;DR: In this paper, the authors investigated the water absorption capability of pervious paving materials and its influence on the evaporation cooling performance in a steady-state hot-humid environment in a wind tunnel.
TL;DR: In this article, a series of laboratory experiments were carried out to study the influence of aggregate size and molding method on the compressive strength, flexural strength, porosity and water permeability coefficient of magnesium phosphate cement steel slag pervious concrete.
TL;DR: In this paper, an innovative continuous permeability measurement system combined with the electrical conductivity measurement is developed to preliminarily reveal the mechanism of sediment clogging in the pores of the pervious concrete pavement under storm water runoff.
Abstract: Pervious concrete pavements have good drainage capabilities; however, storm water runoff during extreme events can cause the pores clogging in permeable pavement. This study aims to preliminarily reveal the mechanism of sediment clogging in the pores of the pervious concrete pavement under storm water runoff. An innovative continuous permeability measurement system combined with the electrical conductivity measurement is developed. Laboratory simulation tests are conducted with this system to demonstrate the effects of four factors on the permeability reduction. The tests indicate that the pore clogging process generally includes three phases, i.e. quick clogging, temporary mitigation of clogging and progressive clogging. The clogging is more prone to occur in specimens with large porosity. Meanwhile, the variation of electrical conductivity of pervious concrete can accurately reflect the clogging process of pervious concrete. A rapid clogging model has been developed and validated. Research resul...
TL;DR: In this article, the authors discuss and summarize the major findings of these collective studies related to: hydraulic performance evaluation of permeable pavement, (2) permeability measurement of porous asphalt and pervious concrete paved surfaces, (3) clogging evaluation of FDPP surfaces, and (4) water quality and pollution control issues.
Abstract: In the future, permeable pavements including the full depth permeable pavement (FDPP) will be part of an integrated sustainable transportation program. When designed properly, FDPP can be used as an alternative best management practice (BMP) for stormwater runoff management. From a practical point of view, FDPP must maintain specific characteristics throughout the life of the pavements: (1) have adequate subgrade reservoir capacity to capture runoff volume, (2) surface pavement remain highly permeable and unclogged, (3) allowing minimum permeability of subgrade soil to infiltrate the captured runoff, and (4) assuring no adverse impact on underground water. During the past ten years the University of California Pavement Research Center (UCPRC) conducted numerous research studies to address some of the above critical questions related to the application of permeable pavement with respect to the highway stormwater runoff management. The focus of this paper is to discuss and summarize the major findings of these collective studies related to: (1) hydraulic performance evaluation of permeable pavement, (2) permeability measurement of porous asphalt and pervious concrete paved surfaces, (3) clogging evaluation of permeable pavement surfaces, and (4) water quality and pollution control issues.
TL;DR: In this paper, the use of nano-titanium dioxide (nTiO2) on porous concrete (TPC) has been investigated to analyze the environmental effect of TPC.
Abstract: Development of the cities is facing many problems; one of them is runoff water pollution. On the other hand, some technologies have been applied to remove water pollution such as the photocatalytic effect method using nano-titanium dioxide (nTiO2). That technology exhibited a significant effect to remove various pollutants from runoff water. The use of nTiO2 on porous concrete (TPC) considers a new technology, which is effective and clean technology to deal with the non-point source pollution. In this paper, the permeability, mechanical properties and water purification capacity of using that technology have been investigated to analyze the environmental effect of TPC. In addition, this study tested the environmental impact using zebrafish aquatic toxicity and alkali dissolution experimentally. Moreover, the photocatalytic oxidation reaction of TPC is exploited to detect the purification effects of three typical pollutants, i.e., methylene blue, total phosphorus, and ammonia nitrogen. At the same time, three different application methods with three different concentrations of nTiO2 have been utilized in the porous concrete to obtain the optimum value. The removal effectiveness in pollutants is also measured, moreover the purification durability effectiveness is tested. After culturing the zebrafish embryos in the leachate of porous concrete with nTiO2, the hatching rate was 91.7%, which proved that this technology has little aquatic toxicity to organism and environment. The capacity of pollutants removing was effective and reached up to 60%-90%. Besides, porous concrete treated by nTiO2 that was placed in actual weather for a month showed a half reduction in water purification effect.
TL;DR: In this paper, a ready-to-use lightweight porous concrete (RLPC) is proposed to improve the early compressive strength and reduce energy and resource consumption during preparation using only solid wastes.
TL;DR: In this article, a series of pervious concrete mixes are made with over burnt brick aggregate and the porosity and permeability are evaluated and a relationship is drawn between permeability and the pore features considering the relative pore size and pore tortuosity.
TL;DR: In this article, the combination of polymer, silica fume and rubber aggregates from rubber tire particles have been used to obtain an optimized pervious concrete, resulting that the PC with silicafume, polymer and rubber aggregate replacement to mineral aggregate has greater compressive and flexural strength.
Abstract: Achieving a pervious concrete (PC) with appropriate physical and mechanical properties used in pavement have been strongly investigated through the use of different materials specifically from the global waste materials of the populated areas. Discarded tires and the rubber tire particles have been currently manufactured as the recycled waste materials. In the current study, the combination of polymer, silica fume and rubber aggregates from rubber tire particles have been used to obtain an optimized PC resulting that the PC with silica fume, polymer and rubber aggregate replacement to mineral aggregate has greater compressive and flexural strength. The related flexural and compressive strength of the produced PC has been increased 31% and 18% compared to the mineral PC concrete, also, the impact resistance has been progressed 8% compared to the mineral aggregate PC and the permeability with Open Graded Fraction Course standard (OGFC). While the manufactured PC has significantly reduced the elasticity modulus of usual pervious concrete, the impact resistance has been remarkably improved.
TL;DR: In this paper, a study aimed to categorize pervious rubberized concrete into fresh and hardened concrete analyzing its durability, permeability and strength, and showed that the use of waste tires as aggregate built into pervious concrete has tremendously reduced the scrap tire wastes enhancing environmental compliance.
Abstract: This study aimed to categorize pervious rubberized concrete into fresh and hardened concrete analyzing its durability, permeability and strength. During the globalization of modern life, growing population and industry rate have signified a sustainable approach to all aspects of modern life. In recent years, pervious concrete (porous concrete) has significantly substituted for pavements due to its mechanical and environmental properties. On the other hand, scrap rubber tire has been also contributed with several disposal challenges. Considering the huge amount of annually tire wastes tossing out, the conditions become worse. Pervious concrete (PC) gap has graded surface assisted with storm water management, recharging groundwater sources and alleviate water run-offs. The results have shown that the use of waste tires as aggregate built into pervious concrete has tremendously reduced the scrap tire wastes enhancing environmental compliance.
TL;DR: In this article, an image-aided approach was used to randomly generate the three-phase (aggregates, cement paste, and air) microstructure model of porous concrete.
TL;DR: In this article, the influences of cement types and curing condition on properties of pervious concrete made with electric arc furnace slag as aggregates were investigated, and four types of cements (type I cement, type II cement, sulphoaluminate cement and calcium aluminate cement) were used and two curing conditions (saturated lime water and air curing) were considered.
TL;DR: In this paper, a four-point cyclic bending loading test of natural aggregate pervious concrete and recycled aggregates was conducted under four different stress levels and the experimental results revealed the mechanical performances, including hysteresis curve characteristics, damping ratio, dynamic elastic modulus and cyclic strain.
Abstract: As a solid pollutant, the recycled aggregate can be reused to replace the natural aggregate to cast pervious concrete, promoting resource recycling and reducing environmental pollution. Pervious concrete is usually applied to transportation engineering as pavements and decks, which are often subjected to fatigue loads in service. Therefore, it is essential to investigate the fatigue mechanical properties of pervious concrete. In this study, four-point cyclic bending loading test of natural aggregate pervious concrete and recycled aggregate pervious concrete were conducted under four different stress levels. By analyzing the experimental results, the mechanical performances, including hysteresis curve characteristics, damping ratio, dynamic elastic modulus and cyclic strain, of two kinds of pervious concrete under cyclic loading were revealed. Based on the improved EPF model, the relationship between fracture parameters, plastic strain and unloading strain were obtained. Besides, the relationship between the loading cycles and the ratio of plastic strain to unloading strain was received according to fatigue testing data under different stress levels. Further, the simplified fatigue model of pervious concrete was proposed and the experimental data was fitted with the model results. The fitting result reached a good agreement.
TL;DR: In this article, the authors compared the mechanical properties, permeability, and durability of high performance pervious concrete (HPPC) incorporated by polyester and epoxy resins as polymeric composites, where ordinary cement material has been completely deleted.
TL;DR: It is recommended that communities select PC and PICP when nitrogen species are the pollutants of concern and PA is more suitable for orthophosphate removal.
TL;DR: In this paper, pre-saturated bentonite with solid content of 11.1% was used to prepare ultra-lightweight EPS concrete at various dry density levels (300, 400, 500 and 600 kg/m3).
TL;DR: In this article, 3-thiocyanatopropyltriethoxysilane (TCPS)-modified Fly ash (T-FA) beads were prepared and incorporated into pervious concrete.
TL;DR: Results showed that PC with CFA and FSD as additives in PC gained enough strength to be considered for field application, and in-situ infiltration and strength results showed that the pavement conformed to the typical values for a functional PC pavement.