Evaluation of Structural Performance of Pervious Concrete in Construction

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Author(s) S.O. Ajamu | A.A. Jimoh | J.R. Oluremi
Pages 829-836
Volume 2
Issue 5
Date May, 2012
Keywords pervious concrete, permeability, compressive strength, aggregate size, porosity

Abstract

The permeability and strength of pervious concrete depend on the particle sizes and proportions of the constituent materials of which the concrete is made of. In this paper, structural property and permeability of pervious concrete made with different coarse aggregate sizes is presented. For the different aggregate/cement ratio used in this study, coarse aggregate size 9.375 mm has higher compressive strength values compared to those made from 18.75 mm aggregate size while 18.75 mm aggregate size had higher permeability value compared to that of 9.38 mm. The average specific gravity of the two aggregates sizes used was 2.7. Aggregate/cement ratio of 6:1, 8:1 and 10:1 respectively were used to produce three different batches of fresh concrete using 18.75mm aggregate size and same ratios were used for 9.375mm coarse aggregate size to produce another three different batches. In each case, aggregate/cement ratio of 6:1 gave the highest compressive strength compared to other aggregate/cement ratio of 8:1 and 10:1. The highest compressive strength obtained was 8.2N/mm2 and 10.8N/mm2 respectively for 18.75mm and 9.375mm coarse aggregate sizes. These values fall within the values stipulated by ACI 552R-10 (2.8N/mm2-28 N/mm2). It was found that the aggregate/cement ratio of 10:1 produced pervious concrete of higher co-efficient of permeability of 3.12x10-3cm/sec and 3.89x10-3cm/sec for aggregate size 9.375mm and 18.75mm respectively.

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