Corrosion monitoring on steel reinforced nano metaclayed-UHPC towards strain modulation using fiber Bragg grating sensor

14th International Conference on Concrete Engineering and Technology

Md Jaafar, M.F.^1 ; Mohd Saman, H.^2 ; Ariffin, N.F.^1 ; Muthusamy, K.^1 ; Wan Ahmad, S.^1 ; Ismail, N.^3

Faculty of Civil Engineering and Earth Resources, Universiti Malaysia Pahang, Lebuhraya Tun Razak, Pahang, Gambang

26300, Malaysia^1

Faculty of Civil Engineering, Universiti Teknologi Mara Shah Alam, Selangor, Shah Alam

40450, Malaysia^2

Faculty of Civil and Environmental Engineering, Universiti Tun Hussien Onn Malaysia, Batu Pahat

86400, Malaysia^3

关键词: Corrosion monitoring;    Corrosion potentials;    Embedded steel;    Fiber Bragg Grating Sensors;    Half-cell potential;    Large strains;    Steel reinforced;    Strain modulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/431/12/122006/pdf
DOI  :  10.1088/1757-899X/431/12/122006

来源: IOP

【 摘 要 】

Today, research on steel corrosion issues are still widely debated and revived scientific attention. In order to detect steel corrosion, an idea to explore the relationship of corrosion potential using half-cell potential related to the variations in strain change on embedded steel measured by FBG sensor were explored. In this study, the steel was embedded in various types of concrete consist of NPC, HPC, UHPC and a series of nano metaclayed-UHPC. It was observed that the steel embedded in NPC is very low in corrosion resistance. Conversely, nano metaclayed-UHPC can delay the embedded steel to corroded. It was also noticeably that the corrosion readings for steel embedded in NPC specimens possess the highest possibility of corrosion potential as well as the large strain was observed by using FBG. Inclusion of 1% nano metaclay in UHPC shows a superior performance in term of corrosion resistance and protected the steel from corrosion. The RSM analysis was found that the R2 values are strong relationship between corrosion potential and strain changes. The R2 obtained for NPC, HPC, UHPC, UHPC1, UHPC3 and UHPC5 models associated with corrosion potential with respect to strain changes were found to be 0.95, 0.99, 0.87, 0.93, 0.98 and 0.97, respectively.