Impact of vertical porosity distribution on the permeability of pervious concrete

Martin, William D.; Kaye, Nigel B.; Putman, Bradley J.

doi:10.1016/j.conbuildmat.2014.02.034

Cited by 73 publications

(36 citation statements)

References 7 publications

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“…The experimental results show that the porosity varied from 19.1 to 28.6%, whereas the permeability varied from 4.3 to 15.3mm/s. Both parameters presented the same tendency: increases in porosity entailed a higher permeability agreeing with the results found in the literature [14,46]. Besides, in order to analyze how the type of aggregate influences the results, a significance analysis using the ANOVA software was carried out.…”

Section: Results and Analysissupporting

confidence: 86%

Correlation between Permeability and Porosity for Pervious Concrete (PC)

Sandoval

Galobardes

Cezario

et al. 2019

DYNA

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The aim of this study was to propose a correlation for the hydraulic parameters of pervious concrete (PC). Thus, three aggregates from civil construction waste and one basalt aggregate (reference) were used to produce PC. The ratio c/a (cement: aggregate) 1:3.26 and a w/c ratio of 0.34 were used in all mixtures. Compressive and flexure tensile strength tests were performed to mechanically characterize the mixtures produced, whereas porosity and constant head permeability tests were also carried out to assess the material hydraulic properties.Firstly, the experimental results were compared with the requirements established in international guidelines (ACI 522R-10, NBR 16416(2015) and VTT-R-080225-13). The results complied with the guidelines indicating it is feasible to produce pervious concretes with the sustainable aggregates used in the study in low structural applications such as walkways. On the other hand, a correlation between permeability and porosity was proposed based on Darcy’s and Bernoulli’s laws. The proposed equation, obtained by means of a non-linear regression, is an exponential equation that characterizes the hydraulic efficiency of the internal channels of the material considering the pores interconnection. The correlation between porosity and permeability was finally validated using results from the literature showing the same trend found in laboratory, and therefore it was demonstrated that the proposed correlation in an efficient tool to predict the hydraulic efficiency of pervious concrete.

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Section: Results and Analysissupporting

confidence: 86%

Correlation between Permeability and Porosity for Pervious Concrete (PC)

Sandoval

Galobardes

Cezario

et al. 2019

DYNA

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“…With a value lower than 0.5%, the particle size A presented significant difference only from the particle size B, and the particle sizes B and C showed no difference from each other. The permeability coefficients obtained are between 10 and 12 mm/s, within the range of values reported in the literature [28][29][30] the impact of this distribution on the permeability of the pavement has not been considered. This research investigates the impact of a vertical porosity distribution on the overall permeability of pervious concrete.…”

Section: Hydraulic Propertiessupporting

confidence: 60%

“…Figure 8 illustrates the proposed correlation between the porosity and the permeability coefficient of the pervious concrete. According to some studies, the correlation between permeability and the porosity for large intervals and large number of data have a most exponential trend [13,28]the impact of this distribution on the permeability of the pavement has not been considered. This research investigates the impact of a vertical porosity distribution on the overall permeability of pervious concrete.…”

Section: Correlationsmentioning

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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“…However, other authors [19,20] observed permeability losses in the range of 80% of the original permeability, but allowing reasonable infiltration rates after 5-8 years of continuous use without maintenance. These differences among on-site studies could be attributable to the different characteristics of the porous mixtures studied [23]. The local conditions of the pavements analysed-especially in relation to the sediment types, sizes and deposition rates, the average daily traffic, and the rainfall regime-are other important factors influencing the clogging rate of porous mixtures [8,[24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Assessment of the Infiltration Capacity Reduction in Clogged Porous Mixture Surfaces

et al. 2016

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Permeable pavements have been used widely across the world to manage urban stormwater. The hydrological behaviour of permeable surfaces is a complex process affected by many factors, such as rainfall intensity, rainfall duration, pavement geometrical conditions, and clogging level of the permeable surface, amongst others. This laboratory study was carried out to assess the influence of clogging level and rainfall intensity on the infiltration capacity of porous mixture surfaces used in Permeable Pavement Systems (PPS). Porous Concrete (PC) and Porous Asphalt (PA) mixtures with different air void contents (15%, 20%, and 25%) were subject to different clogging scenarios by using varying sediment loads (0, 500, and 1000 g/m 2 ). Permeability experiments were carried out for each clogging scenario through a new rainfall simulator specially developed, tailored, and calibrated for the laboratory simulation of a wide range of rainfall events. Permeability measurements were taken under all different scenarios as a result of the combination of the different rainfall events (50, 100, and 150 mm/h) simulated over the specimens of porous mixtures and the sediment loads applied to them. The results showed that the PC mixtures tested perform better than the PA ones in terms of infiltration capacity, showing less potential for clogging and being more easily cleaned by the wash-off produced by the simulated rainfall events.

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Impact of vertical porosity distribution on the permeability of pervious concrete

Cited by 73 publications

References 7 publications

Correlation between Permeability and Porosity for Pervious Concrete (PC)

Correlation between Permeability and Porosity for Pervious Concrete (PC)

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

Laboratory Assessment of the Infiltration Capacity Reduction in Clogged Porous Mixture Surfaces

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