Title: Effect of chemical additives and recycled aggregate size on the properties of pervious concrete pavement

Authors: Fatima Alsaleh; Feras Al Adday

Addresses: Faculty of Civil Engineering, University of Aleppo, Aleppo 12212, Syria ' Faculty of Civil and Architectural Engineering, University of Kalamoon, Damascus-Homs International Highway, Deirattiah P.O. Box 222, Syria

Abstract: This research investigates how changes in aggregate diameter and percentage of chemical additives affect the performance of pervious concrete (PC) made from recycled aggregates (RA) in Syria. In the first stage, three distinct mixing methods of adding chemical plasticizer (CP) to the other mixture constituents [recycled aggregates (RA), water, and cement] were tested. In the second stage, two types of RC (coarse and fine) are treated with a viscosity-modifying plasticizer (added at rates of 0.5, 1, 1.5 and 2%). The study's findings revealed that the third mixing method, which involves the creation of a cement slurry, is superior. Furthermore, the optimal ratio of viscosity-modifying plasticizer was found to be 1.6% and 1.9% for coarse and fine RC, respectively. When using fine aggregates, a higher compressive strength value was obtained than when using coarse aggregates. Additionally, the third-generation viscosity-modifying plasticizer resulted in higher compressive strength.

Keywords: pervious concrete; chemical additives; flexible pavement; recycled aggregates; compressive strength; viscosity-modifying plasticiser.

DOI: 10.1504/IJMRI.2025.144874

International Journal of Masonry Research and Innovation, 2025 Vol.10 No.2, pp.178 - 188

Received: 22 Sep 2023
Accepted: 13 Nov 2023
Published online: 06 Mar 2025 *

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