Compressive response of pervious concretes proportioned for desired porosities

Deo, Omkar; Neithalath, Narayanan

doi:10.1016/j.conbuildmat.2011.04.055

Cited by 169 publications

(57 citation statements)

References 22 publications

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“…In Figure 6a, the pervious concrete with smaller aggregates had a higher proportion of smaller pores, whereas the pervious concrete with larger aggregates had a relatively large proportion of large pores. In Figure 6b, the pervious concrete with larger aggregates had a larger effective pore size (the pore size corresponding to 50% of the cumulative frequency distribution [8]), and its cumulative frequency curve increased more slowly. For example, when the aggregate size of concrete was 4.75-9.5 mm, the pore sizes of pervious concrete were mainly concentrated within 7 mm; 71% of the pores were smaller than 5 mm and the effective pore size was about 2.4 mm.…”

Section: Pore Distribution Of Pervious Concretementioning

confidence: 99%

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Investigation of the Porosity Distribution, Permeability, and Mechanical Performance of Pervious Concretes

Liu

Sha

et al. 2018

Processes

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Pervious concrete is a kind of porous and permeable material for pavements and slope protection projects, etc. In this paper, a kind of pervious concrete was prepared with Portland cement, silica fume (SF), polycarboxylate superplasticizer (SP), and limestone aggregates. The performance of concrete, such as its porosity, pore distribution, permeability coefficients, and mechanical properties, were studied through laboratory tests. The volumetric porosity was measured by the water displacement method, and the planar porosity and pore size distribution were determined using image processing technology. A permeameter with a transparent sidewall and an exact sidewall sealing method were used to measure the permeability coefficients accurately. The results show that the segregation index and flow values of pastes increased with the increase of SP and water cement ratio (W/C). The measured porosity (volumetric porosity and planar porosity) of pervious concrete with a single-size aggregate was closer to the design porosity than that with the blended aggregate. Compared with the design porosity selected in this study, aggregate size was the main factor influencing the pore distribution of pervious concrete. The standard deviation of the permeability coefficient was less than 0.03 under different hydraulic gradients. It was found that the relationships between the permeability coefficient and volumetric porosity (or effective pore size d 50 ) approximately obey polynomial function. Based on the test results, the optimized parameters were suggested for practical engineering: W/C of 0.26-0.30; 0.5% SP content; 5% SF content; 15-21% design porosity; and aggregate sizes of 4.75-9.5 mm and 9.5-16 mm.

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Section: Pore Distribution Of Pervious Concretementioning

confidence: 99%

“…An image of surface was captured by a camera, and the outer region of this image was cut to avoid edge effects. Finally, the image was processed by Image-Pro Plus 6.0 software, and an appropriate threshold was chosen to obtain the pore size distribution and planar porosity, according to Reference [8].…”

Section: Permeability Coefficientmentioning

confidence: 99%

Investigation of the Porosity Distribution, Permeability, and Mechanical Performance of Pervious Concretes

Liu

Sha

et al. 2018

Processes

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“…To provide an applicable amount of cement paste around the aggregate is the primary principle in the mix design proportion. In one of the studies, the mix proportion was calculated using the absolute volume method (Deo and Neithalath. 2011).…”

Section: Literature Reviewmentioning

confidence: 99%

Holistic simulation of tire-pavement-system: Mechanics and uncertainty

Kaliske¹,

Wollny²,

Hartung³

et al. 2018

Advances in Materials and Pavement Performance Prediction

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“…PC is composed of Portland cement, coarse aggregate and water, with little or no small aggregate (sand), which facilitates the formation of interconnected internal voids that allow the fast and safe flow of water [1,2,5,6]. In terms of mechanical strength, this material works in the range of 3-30 MPa [7][8][9][10], and can be used on pedestrian sidewalks and light traffic pavements. In hydraulic terms, the permeability coefficient of the material varies from 1 to 20mm/s, which guarantees the rapid flow of water through its structure [4,[11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Pervious concrete made with electric furnace slag (FEA): mechanical and hydraulic properties

Sandoval

Galobardes

Dias

et al. 2019

Rev. IBRACON Estrut. Mater.

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ResumoThe objective of this work is to make feasible the use of FEA slag instead of the conventional bulk aggregate in the pervious concrete (PC) production, reaching the minimum parameters required by NBR16416/2015 and ACI 522R-10. This substitution would minimize the use of natural aggregates, besides taking advantage of a residue that has no specifi c destination. In order to reach the objective, three FEAs with diff erent grain sizes were chosen: 6-10 mm (A), 10-20 mm (B) and fi nally a mixture of the two previous ones (C) in the proportion 30-70 respectively. In order to evaluate its mechanical behavior, tests of compressive strength and fl exural tensile tests were carried out, while the evaluation of the hydraulic behavior, porosity and constant head permeability test were performed. The compressive strength varies from 19-31MPa and 3-4MPa for fl exural tensile strength was obtained. In hydraulic terms, the porosity varied from 15-20% and the permeability coeffi cient was 10-12mm/s. There is also a direct infl uence of grains of size less than 4.8 mm (small aggregate) on the compressive strength and permeability of PCs. At the end of the results, it was possible to establish a correlation between the compressive strength, the permeability and the percentage of grains inferior to 4.8mm (sand%), being this positive in relation to the studied variables, that is, the mechanical and hydraulics. Therefore, it has been concluded that the total substitution of conventional aggregates by FEA in CoPe manufacturing will comply with the minimum parameters of NBR 16416/2015.O objetivo deste trabalho é viabilizar o uso de escória de forno elétrico (FEA) em substituição ao agregado graúdo convencional na fabricação de concreto permeável (CoPe), atingindo os parâmetros mínimos exigidos pela norma NBR16416/2015. Esta substituição minimizaria a utilização de agregados naturais, além de aproveitar um resíduo que não tem destinação específi ca. Para alcançar o objetivo foram escolhidos três FEA's com diferentes distribuições granulométricas: 6-10 mm (A), 10-20 mm (B) e fi nalmente uma mistura das duas anteriores (C) na proporção 30-70 respectivamente. Para avaliar seu comportamento mecânico foram realizados ensaios de resistência à compressão e tração na fl exão, enquanto na avaliação do comportamento hidráulico, índice de vazios e permeabilidade à carga constante foram realizados. Na compressão foram obtidas resistências variando de 19-31MPa e 3-4MPa na tração na fl exão. Em termos hidráulicos, o índice de vazios variou de 15%-20% e o coefi ciente de permeabilidade de 10-12mm/s. Também se verifi ca a infl uência direta dos grãos de tamanho inferior a 4.8 mm (agregado miúdo) na resistência à compressão e na permeabilidade dos CoPes. Ao fi nal, a partir dos resultados obtidos foi possível estabelecer uma correlação entre a resistência à compressão, a permeabilidade e a porcentagem de grãos inferiores a 4.8mm (%areia), sendo esta positiva em relação às variáveis estudadas, ou seja, as propriedades mecânicas e hidráulica. Por ta...

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Compressive response of pervious concretes proportioned for desired porosities

Cited by 169 publications

References 22 publications

Investigation of the Porosity Distribution, Permeability, and Mechanical Performance of Pervious Concretes

Investigation of the Porosity Distribution, Permeability, and Mechanical Performance of Pervious Concretes

Holistic simulation of tire-pavement-system: Mechanics and uncertainty

Pervious concrete made with electric furnace slag (FEA): mechanical and hydraulic properties

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