Mechanical properties of concrete containing phase-change material. (3rd July 2016)

• Record Type: Journal Article
• Authors: Yang, Hong-Bin; Liu, Tony C.; Chern, Jenn-Chuan; Lee, Ming-Hao
• Is Part Of: Journal of the Chinese Institute of Engineers. Volume 39:Number 5(2016)
• Page Start: 521
• Page End: 530
• Publication Date: 2016-07-03
• Subjects: Compressive strength -- concrete -- drying shrinkage -- elastic modulus -- mechanical properties -- phase-change material (PCM) -- solid–liquid phase; Technology -- Periodicals; Engineering -- Periodicals; 620.005
• DOI: 10.1080/02533839.2015.1134280
• Languages: English
• ISSNs: 0253-3839

Abstract

Abstract: This study aimed to investigate the mechanical properties of concrete containing solid–liquid phase-change material (PCM) and focused on two key factors. First, a systematic study on the mechanical performance of PCM-modified concretes was conducted, including compressive, elastic modulus, and shrinkage tests. Second, because PCM provides high latent heat during the solid–liquid phase change, the effects of the solid phase and liquid phase on the mechanical properties of concrete were also explored. Results of this study showed that the solid–liquid phase of PCM affected the mechanical properties of concrete. For example, the compressive strength of 10% PCM concrete in solid phase (23 °C) and liquid phase (40 °C) at 28 days was 29.30 and 19.57 MPa, respectively. In addition, with increasing PCM content, the mechanical properties were degraded. For example, 10, 20, and 30% of PCM content lowered the compressive strength by 35.4, 58.4, and 74.3%, respectively. Therefore, concrete with PCM may not be suitable for structural elements. However, PCM is an important solution for optimizing energy consumption in modern buildings. It can absorb or emit large amounts of heat to store or release thermal energy. These properties can be used to control building temperatures resulting in energy saving and carbon reduction.