This paper presents an accelerated aging test of durability of 3 different materials-glass fiber reinforced polymer (GFRP), carbon fiber reinforced polymer (CFRP) and stainless steel (SS) type AISI304-with combined use of seawater sea sand concrete (SWSSC) within ocean environment. Figure (a) and Figure (b) illustrate different exposure environments of Concrete filled tubes (CFST) and Concrete filled double skin tubes (CFDST). The accelerated aging is achieved by elevating temperatures (i.e. 40oC and 60oC). Rectangular coupon and cylindrical tube specimens were immersed in 4 different solutions-alkaline seawater solution (i.e. simulation of SWSSC pore solution), alkaline solution (i.e. simulation of normal concrete (NC) pore solution), saline solution (i.e. simulation of seawater) and distilled water (i.e. reference solution)-for 15, 30, 60, and 90-days. The corrosion rate for stainless steel was calculated based on weight loss while degradation rates of GFRP and CFRP were determined by mass gain and weight loss. In addition, scanning electron microscopy (SEM) test was carried out to examine the surface/microstructure change. The results evidenced that SS AISI304 and CFRP have good durability performance over GFRP especially in SWSSC and NC at elevated temperature. However, in saline environment, no sign of degradation was observed for FRPs and only minimal corrosion was noticed for SS specimens in SEM results.
|Title of host publication||Proceedings of the 11th International Conference on Advances in Steel-Concrete Composite Structures (ASCCS 2015)|
|Editors||Lin-Hai Han, Wei Li, Dennis Lam|
|Place of Publication||Beijing China|
|Publisher||Tsinghua University Press|
|Pages||1 - 8|
|Number of pages||8|
|Publication status||Published - 2015|
|Event||ASCCS International Conference on Steel-Concrete Composite and Hybrid Structures 2015 - Wenjin Hotel, Beijing, China|
Duration: 3 Dec 2015 → 5 Dec 2015
Conference number: 11th
|Conference||ASCCS International Conference on Steel-Concrete Composite and Hybrid Structures 2015|
|Abbreviated title||ASCCS 2015|
|Period||3/12/15 → 5/12/15|
Guo, F., Khoo, W., Al-Saadi, S. H. M., Li, Y., Singh, R. R. K., & Zhao, X. L. (2015). Preliminary study on durability of FRP and stainless steel in seawater and sea sand concrete (SWSSC) environment. In L-H. Han, W. Li, & D. Lam (Eds.), Proceedings of the 11th International Conference on Advances in Steel-Concrete Composite Structures (ASCCS 2015) (pp. 1 - 8). Tsinghua University Press.