Study on the hydraulic conductivity by constant and falling head methods for pervious concrete

Batezini, Rafael; Balbo, José Tadeu

doi:10.1590/s1983-41952015000300002

Cited by 18 publications

(11 citation statements)

References 2 publications

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“…The results of hydraulic conductivity are given in Table 4. Values are comparable with those presented in studies like [17,18]. The highest hydraulic conductivity was achieved by the W25 mixture (10.2 mm/s).…”

Section: Hydraulic Conductivitysupporting

confidence: 90%

Pervious Concrete as an Environmental Solution for Pavements: Focus on Key Properties

Kováč

Sičáková

2018

Environments

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Pervious concrete is considered to be an advanced pavement material in terms of the environmental benefits arising from its basic feature-high water-permeability. This paper presents the results of experimental work that is aimed at testing technically important properties of pervious concrete prepared with three different water-to-cement ratios. The following properties of pervious concrete were tested-compressive and splitting tensile strength, unit weight at dry conditions, void content, and permeability. The mix proportions were expected to have the same volume of cement paste, and, to obtain the same 20% void content for all of the samples. The results show that changes of water-to-cement ratio from 0.35 to 0.25 caused only slight differences in strength characteristics. Arising tendency was found in the case of compressive strength and a decreasing tendency in the case of splitting tensile strength. The hydraulic conductivity ranged from 10.2 mm/s to 7.5 mm/s. The values of both the unit weight and void content were also analysed to compare the theoretical (calculated) values and real experiment results. A fairly good agreement was reached in the case of mixtures with 0.35 and 0.30 water-to-cement ratios, while minor differences were found in the case of 0.25 ratio. Finally, a very tight correlation was found between void content, hydraulic conductivity, and compressive strength.

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Section: Hydraulic Conductivitysupporting

confidence: 90%

Pervious Concrete as an Environmental Solution for Pavements: Focus on Key Properties

Kováč

Sičáková

2018

Environments

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“…The tests were carried out when both the internal and external water table were in a fixed position. Measurements of outflow water were repeated five times for each test point [31,45,46].…”

Section: Methodsmentioning

confidence: 99%

Estimation of Recycled Concrete Aggregate’s Water Permeability Coefficient as Earth Construction Material with the Application of an Analytical Method

2019

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Creating models based on empirical data and their statistical measurements have been used for a long time in the economic sciences. Increasingly, these methods are used in the technical sciences, such as construction and geotechnical engineering. This allows for reducing the costs of geotechnical research at the design stage. This article presents the research carried out on Recycled Concrete Aggregate (RCA) material with is reclaimed crushed concrete rubble. Permeability tests were carried out using the constant head method. Tests were conducted on blends of RCA with the following particle size ranges: 0.02–16 mm, 0.05–16 mm, 0.1–16 mm, and 0.2–16 mm. The gradients used during the tests were between 0.2 to 0.83, which corresponds to gradients encountered in earth construction and are below the critical gradient. Directly from the tests, the flux velocity for the range of tested gradients were calculated based on filtered water volume measurements. The values of the permeability coefficient (k) were then recalculated. Finally, statistical methods were used to determine which physical parameters of the tested material affect the permeability coefficient. The physical parameters selected from the statistical analysis were used to create a model describing the phenomenon. The model can be used to determine the permeability coefficient for a mixed RCA material. The article ends with conclusions and proposals concerning the use of models and the limits of their applicability.

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“…The molds were made of PVC, with the dimensions of 100 x 200 mm, according to ASTM C192. The methodology applied to calculate the trace of pervious concrete was the one proposed by Batezini and Balbo (2015) for the mixture ratio of Pervious Concrete. The materials used were the ordinary Portland cement CP IV 32, aggregates and water.…”

Section: Methodsmentioning

confidence: 99%

“…In this research were carried out tests of permeability and compressive strength of specimens of pervious concrete. The permeability coefficient or hydraulic conductivity of the permeability was calculated by evaluated based on eq.4 (Batezini and Balbo, 2015). The methodology used in laboratory tests followed ASTM standards according to modern laboratory techniques and proposed technological precepts (Aliabdo et al, 2018).…”

Section: Methodsmentioning

confidence: 99%

Environmental Implications of CO2 absorption by pervious concrete pavement in urban roads

Oliveira¹,

Guerreiro²,

Isabeu³

et al. 2019

XIII CTV 2019 Proceedings: XIII International Conference on Virtual Cityand Territory: “Challenges and Paradigms of the Contemp

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This research deals with a new material, made from conventional pervious concrete, but with the addition of two components in its mixture, calcium hydroxide (Ca(OH) 2), to improve its carbon dioxide (CO 2) absorption properties from the atmosphere, and Scrap Tyre Tubes (STT), a rubber waste from used tyres of vehicle (motorcycles and cars), which makes the new material lighter and contributes to urban sustainability by reusing industrial waste automotive. Conventional pervious concrete has a main property that benefits the environment, which is natural from its porous structure, which is the permeability of the urban pavement, which allows the drainage of rainwater from the urban pavement to the underground, contributing to the reduction of flooding in cities through the infiltration of water into the groundwater. This research sought to improve conventional pervious concrete through additives in its mix to create a new porous material, more efficient at sequestering CO 2 from the atmosphere, lighter and reusing rubber waste from used tyres. The porosity of conventional pervious concrete makes this material ideal for carbon dioxide (CO 2) sequestration due to the ease of CO 2 penetration into its internal structure pore network, which interacts with cement and other additives, which by means of a chemical reaction called carbonation, absorbs CO 2 from the atmosphere to form calcium carbonate (CaCO 3) in its internal structure, which is an excellent environmental benefit for the materials used in the manufacture of urban pavements, as it makes the urban pavement contribute directly for air quality and for

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Study on the hydraulic conductivity by constant and falling head methods for pervious concrete

Cited by 18 publications

References 2 publications

Pervious Concrete as an Environmental Solution for Pavements: Focus on Key Properties

Pervious Concrete as an Environmental Solution for Pavements: Focus on Key Properties

Estimation of Recycled Concrete Aggregate’s Water Permeability Coefficient as Earth Construction Material with the Application of an Analytical Method

Environmental Implications of CO2 absorption by pervious concrete pavement in urban roads

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