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Advances in Materials Science and Engineering
Volume 2017, Article ID 2394641, 11 pages
https://doi.org/10.1155/2017/2394641
Research Article

Properties and Internal Curing of Concrete Containing Recycled Autoclaved Aerated Lightweight Concrete as Aggregate

1Department of Civil Engineering, Faculty of Engineering, Chiang Mai University, 239 Huay Kaew Road, Muang District, Chiang Mai 50200, Thailand
2Center of Excellence for Natural Disaster Management (CENDIM), Chiang Mai University, 239 Huay Kaew Road, Muang District, Chiang Mai 50200, Thailand

Correspondence should be addressed to Pitiwat Wattanachai; ht.ca.umc.gne@tawitip

Received 1 June 2017; Accepted 10 July 2017; Published 20 August 2017

Academic Editor: Tung-Chai Ling

Copyright © 2017 Teewara Suwan and Pitiwat Wattanachai. 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

Global warming is a vital issue addressed to every sector worldwide, including the construction industry. To achieve the concept of green technology, many attempts have been carried out to develop low-carbon footprint products. In the construction sector, Autoclaved Aerated Concrete (AAC) has become more popular and been manufactured to meet the construction demand. However, errors from manufacturing process accounted for approximately 3 to 5% of the AAC production. The development of AAC waste as lightweight aggregate in concrete is one of the potential approaches which was extendedly studied in this paper. The results showed that the compressive strength of AAC-LWA concrete was decreased with an increase in volume and coarse size. The optimum mix proportion was the AAC aggregate size of 1/2′′ to 3/8′′ with 20 to 40% replacement to normal weight aggregate. Internal curing by AAC-LWA was also observed and found to provide sufficient water inside the specimens, leading to an achievement in higher compressive strength. The main goal of this study is not only utilising unwanted wastes from industry (recycling of waste materials) but also building up a new knowledge of using AAC-LWA as an internal curing agent as well as the production of value-added lightweight concrete products.