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

Abstract

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.

Experimental Investigation of Compressive Strength and Infiltration Rate of Pervious Concrete by Fully Reduction of Sand

“…Panimayam et al, [21] added granite manufactured sand and determined the compressive strength and permeability. Pervious concrete is considered to be an advanced pavement material in terms of the environmental benefits arising from its basic featurehigh water-permeability [22]. Most of the literature studies has either mixed the material or replaced partial sand so in this study authors have replaced sand/fine aggregate with consecutive order proportion from 10% up to 100% fully reduced to save the natural material also study the compressive strength and permeability.…”

Properties of pervious concrete with various types and sizes of aggregate

“…During the mixing process, the nature of the fresh mixture's workability was controlled visually [41]. A greater aggregate mixture with the potential of segregation was prevented by mixing manually.…”

Definition of Concrete and Composite Precast Concrete Pavements Texture

“…Porous concrete is a type of concrete containing interconnected pores (usually air void content is from 5 to 25% by volume) with typical water permeability rate of ≥200 L/min/m 2 (Sonebi et al 2016;Kováč, Sičáková 2018;Tennis et al 2004). Maximum aggregate size of wearing layer porous concrete should be 8 mm or less (Kováč, Sičáková 2018;Hendrikx 1998). Typical compressive strength of porous concrete is from 3.5 to 28.0 MPa, though 17 MPa is usual (Tennis et al 2004).…”

“…Acceptable value of flexural strength is 3.5 MPa. In various geographic areas required water/cement ratio is 0.27…0.34 (Sonebi et al 2016;Mahboub et al 2009;Tennis et al 2004;Elliot 2010;Kováč, Sičáková 2018). However, porous concrete with compressive strength around 17 MPa is more suitable for light traffic areas -for highways and other heavy traffic areas is necessary to use much more stronger porous concrete.…”