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The Scientific World Journal
Volume 2013 (2013), Article ID 306714, 7 pages
http://dx.doi.org/10.1155/2013/306714
Research Article

Microstructure and Mechanical Properties of Recycled Aggregate Concrete in Seawater Environment

1State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (USTB), Ministry of Education, Beijing 100083, China
2School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
3Nuclear Engineering Investigation Institute of Guangdong, Guangzhou 51080, China

Received 1 August 2013; Accepted 25 August 2013

Academic Editors: C.-C. Hwang, C. W. Kan, and A. Tonkikh

Copyright © 2013 Pengjun Yue et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study aims to conduct research about the microstructure and basic properties of recycled aggregate concrete under seawater corrosion. Concrete specimens were fabricated and tested with different replacement percentages of 0%, 30%, and 60% after immersing in seawater for 4, 8, 12, and 16 months, respectively. The basic properties of recycled aggregate concrete (RAC) including the compressive strength, the elastic modulus, and chloride penetration depth were explicitly investigated. And the microstructure of recycled concrete aggregate (RCA) was revealed to find the seawater corrosion by using scanning electron microscope (SEM). The results showed that higher amount of the RCA means more porosity and less strength, which could lower both the compressive strength and resistance to chloride penetration. This research could be a guide in theoretical and numerical analysis for the design of RAC structures.