Experimental Study on Flexural Capacity of Corroded RC Slabs Reinforced with Basalt Fiber Textile
This experimental study investigated the flexural performance of corroded reinforced concrete (RC) slabs strengthened with basalt textile-reinforced mortar (BTRM) and basalt fiber-reinforced polymers (BFRP). Ten RC slabs were designed to achieve the expected corrosion levels (8% mass loss for modera...
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doaj-f67d8ff10d444e748e35cb8a080637e52020-12-26T00:02:29ZengMDPI AGApplied Sciences2076-34172021-12-011114414410.3390/app11010144Experimental Study on Flexural Capacity of Corroded RC Slabs Reinforced with Basalt Fiber TextileLiang Fang0Yun Zhou1Duhang Yi2Weijian Yi3College of Civil Engineering, Hunan University, Changsha 410082, ChinaCollege of Civil Engineering, Hunan University, Changsha 410082, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaCollege of Civil Engineering, Hunan University, Changsha 410082, ChinaThis experimental study investigated the flexural performance of corroded reinforced concrete (RC) slabs strengthened with basalt textile-reinforced mortar (BTRM) and basalt fiber-reinforced polymers (BFRP). Ten RC slabs were designed to achieve the expected corrosion levels (8% mass loss for moderate corrosion and 16% mass loss for severe corrosion) by accelerated corrosion methods. Two slabs served as reference specimens, and eight slabs were strengthened with BFRP or BTRM. The specimens were loaded to failure by the four-point bending method. The corrosion ratio, strengthening materials and the number of layers were tested for comparison. The failure modes, flexural capacities, load–deflection curves and deformation performances of the slabs were obtained from experiments. It was found that the use of BTRM layers was more effective in improving the flexural response than the use of the same amount of BFRP layers externally bonded with the corroded RC slabs under a state of serviceability. The results also showed that the strengthening effects of BFRP and BTRM were affected by the initial corrosion ratio and the number of textile layers. In a moderate state of corrosion, the flexural capacities and deflection capacities of RC slabs strengthened by BFRP and BTRM were increased substantially; the flexural capacities were increased by 27.81%~61.85%. In a severe corrosion state, the increase in flexural capacity of strengthened slabs is marginal but the increase in ductility indexes was 18% to 35% compared with the corresponding control slabs. By increasing the number of textile layers from three to five, the increments of the flexural capacity of strengthened slabs are almost doubled. Finally, the calculated results of the flexural capacity of the corroded RC slabs strengthened with BFRP and BTRM were found to be in good agreement with the experimental results.https://www.mdpi.com/2076-3417/11/1/144reinforced concrete (RC) slabsaccelerated corrosion methodbasalt textile-reinforced mortar (BTRM)basalt fiber-reinforced polymers (BFRP)flexural capacity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Liang Fang Yun Zhou Duhang Yi Weijian Yi |
spellingShingle |
Liang Fang Yun Zhou Duhang Yi Weijian Yi Experimental Study on Flexural Capacity of Corroded RC Slabs Reinforced with Basalt Fiber Textile Applied Sciences reinforced concrete (RC) slabs accelerated corrosion method basalt textile-reinforced mortar (BTRM) basalt fiber-reinforced polymers (BFRP) flexural capacity |
author_facet |
Liang Fang Yun Zhou Duhang Yi Weijian Yi |
author_sort |
Liang Fang |
title |
Experimental Study on Flexural Capacity of Corroded RC Slabs Reinforced with Basalt Fiber Textile |
title_short |
Experimental Study on Flexural Capacity of Corroded RC Slabs Reinforced with Basalt Fiber Textile |
title_full |
Experimental Study on Flexural Capacity of Corroded RC Slabs Reinforced with Basalt Fiber Textile |
title_fullStr |
Experimental Study on Flexural Capacity of Corroded RC Slabs Reinforced with Basalt Fiber Textile |
title_full_unstemmed |
Experimental Study on Flexural Capacity of Corroded RC Slabs Reinforced with Basalt Fiber Textile |
title_sort |
experimental study on flexural capacity of corroded rc slabs reinforced with basalt fiber textile |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2021-12-01 |
description |
This experimental study investigated the flexural performance of corroded reinforced concrete (RC) slabs strengthened with basalt textile-reinforced mortar (BTRM) and basalt fiber-reinforced polymers (BFRP). Ten RC slabs were designed to achieve the expected corrosion levels (8% mass loss for moderate corrosion and 16% mass loss for severe corrosion) by accelerated corrosion methods. Two slabs served as reference specimens, and eight slabs were strengthened with BFRP or BTRM. The specimens were loaded to failure by the four-point bending method. The corrosion ratio, strengthening materials and the number of layers were tested for comparison. The failure modes, flexural capacities, load–deflection curves and deformation performances of the slabs were obtained from experiments. It was found that the use of BTRM layers was more effective in improving the flexural response than the use of the same amount of BFRP layers externally bonded with the corroded RC slabs under a state of serviceability. The results also showed that the strengthening effects of BFRP and BTRM were affected by the initial corrosion ratio and the number of textile layers. In a moderate state of corrosion, the flexural capacities and deflection capacities of RC slabs strengthened by BFRP and BTRM were increased substantially; the flexural capacities were increased by 27.81%~61.85%. In a severe corrosion state, the increase in flexural capacity of strengthened slabs is marginal but the increase in ductility indexes was 18% to 35% compared with the corresponding control slabs. By increasing the number of textile layers from three to five, the increments of the flexural capacity of strengthened slabs are almost doubled. Finally, the calculated results of the flexural capacity of the corroded RC slabs strengthened with BFRP and BTRM were found to be in good agreement with the experimental results. |
topic |
reinforced concrete (RC) slabs accelerated corrosion method basalt textile-reinforced mortar (BTRM) basalt fiber-reinforced polymers (BFRP) flexural capacity |
url |
https://www.mdpi.com/2076-3417/11/1/144 |
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