Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6716407 | Construction and Building Materials | 2018 | 8 Pages |
Abstract
This study was aimed to investigate the effect of temperatures on thaumasite form of sulfate attack (TSA) in cement mortars under electrical field. The mortars were preserved at â5â¯Â°C, 5â¯Â°C, 20â¯Â°C, 5â¯Â°C-20â¯Â°C cycles, respectively. The damages were visually observed and compressive strengths of specimens were tested on a regular basis. X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) were carried out to analyze deteriorated products. The results indicated that the specimens at 20â¯Â°C under both full-immersion and electrical field after 150â¯days were rarely damaged and thaumasite could not be detected. The failure of specimens at â5â¯Â°C was mainly due to freezing-thawing and salt scaling, resulting superficial damage. Moreover, an electrical field accelerated the damage induced by sulfate attack in the mortars and the deterioration of specimens at 5â¯Â°C was mostly due to the formation of TSA.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Qianpu Zeng, Chong Wang, Yaoling Luo, Chao Yu, Qian Huang, Chaoqun Luo,