Treatments on CDW Recycled Aggregates Surface Using Silane-Based Water Repellent

Abstract:

This study aims to investigate the properties of CDW recycled aggregates using silane-based water repellent agent in three different types of treatments: (a) immersion; (b) sprinkling; and (c) dripping; in order to improve the reduces quality of the material due to the high porosity. Wettability and water absorption were determined by apparent contact angle measurements, water absorption after 24h of saturation (standard method) and recording the variation of submerged mass during 24 hs. All treatment allowed reducing the water absorption and its kinetic. The contact angle measurements confirmed the effectiveness of the treatment: the surface resulted always hydrophobic. Comparing the treatments, immersion gave the best result in terms of absolute results and in terms of variability of measurements.

• Periodical: Key Engineering Materials (Volume 668)
• Pages: 197-206
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.668.197
• Online since: October 2015
• Authors: Winnie Franco Santos, Marco Quattrone, Sergio Cirelli Angulo
• Keywords: Construction Waste, Demolition Waste, Recycled Aggregate, Silane, Surface Treatment, Water Absorption

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