Mechanical Properties of Recycled Aggregate Concrete at High and Low Water to Binder Ratios

Abstract:

This paper presents an original research on the influence of defects in recycled aggregate (RA) on mechanical properties of recycled aggregate concrete (RAC), including compressive strength, splitting tensile strength, fracture energy and elastic modulus. Six types of concretes, with the water to binder ratios (W/B) of 0.26 and 0.60, were prepared using nature aggregate (NA), RA and recycled aggregate treated by 3 mol/L (RA-H). Mechanical properties of RAC was inferior to that of NAC, and treated RA by sulfuric acid solution could improve the mechanical properties. Attached mortar in RA was the main factor resulting in the decrease of mechanical properties of RAC with 0.26 W/B, and for the RAC with 0.60 W/B, the effect of aggregate damage was more significant than that of attached mortar.

• Periodical: Key Engineering Materials (Volumes 629-630)
• Pages: 321-329
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.629-630.321
• Online since: October 2014
• Authors: Gai Fei Peng*, Shuo Wang, Ting Li
• Keywords: Attached Mortar, Elastic Modulus, Fracture Energy, Recycled Aggregate (RA), Strength

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