Effect of Hybrid FRP Confinement on Tin Slag Polymer Concrete Compressive Strength

Muhamad Soffi Manda, M. Rejab, S. A. Hassan, M. U. Wahit
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Abstract

This study investigates the strength enhancement of Tin Slag Polymer Concrete (TSPC) under hybrid GFRP and CFRP confinement in comparison with mono GFRP and CFRP confinement on TSPC circular short column samples. Hybrid FRP confinement is prepared by wrapping TSPC with GFRP followed by CFRP both 1 layer using epoxy Sikadur 330 as matrix binders with 50 mm overlap. Compression test was performed on unconfined TSPC (TSPC-UC), TSPC with GFRP confinement (TSPC-GF), TSPC with CFRP confinement (TSPC-CF) and TSPC with hybrid FRP confinement (TSPC-HB) with 1mm/ min loading rate. The test results have revealed that the ultimate strengths are 59.19 MPa (TSPC-UC), 85.54 MPa (TSPC-GF), 108.77 MPa (TSPC-CF) and 124.59 MPa (TSPC-HB). The corresponding compressive strain measured at ultimate compressive strength is 0.0300 (TSPC-UC), 0.0453 (TSPC-GF), 0.0398 (TSPC-CF) and 0.0588 (TSPC-HB). Stress versus strain curve has shown that compared to TSPC-UC, externally strengthen sample with GFRP, CFRP and Hybrid FRP have enhanced TSPC strength with slight different behavior. TSPC-GF has less strength enhancement with larger strain while TSPC-CF provide larger strength enhancement but with lower strain. However, TSPC-HB has shown the highest strength enhancement with larger strain benefit from combined GFRP and CFRP properties. Failure mode of hybrid FRP confinement on TSPC (TSPC-HB) has shown combination of both FRP components failure mode (TSPC-GF and TSPC-CF) as in rupture pattern and delamination. The results of this study has provide findings on the effect of hybrid FRP confinement on TSPC circular column sample in close expectation based on literatures.
复合玻璃钢约束对锡渣聚合物混凝土抗压强度的影响
本文研究了锡渣聚合物混凝土(TSPC)在GFRP和CFRP复合约束下的强度增强,并与TSPC圆形短柱样品的单一GFRP和CFRP约束进行了比较。复合玻璃钢约束是通过用GFRP包裹TSPC,然后用CFRP包裹CFRP,两者都是1层,使用环氧树脂Sikadur 330作为基质粘合剂,重叠50毫米。在加载速率为1mm/ min的情况下,对无侧限的TSPC (TSPC- uc)、GFRP约束的TSPC (TSPC- gf)、CFRP约束的TSPC (TSPC- cf)和复合玻璃钢约束的TSPC (TSPC- hb)进行压缩试验。试验结果表明,TSPC-UC、TSPC-GF、TSPC-CF和TSPC-HB的极限强度分别为59.19 MPa、85.54 MPa、108.77 MPa和124.59 MPa。在极限抗压强度下测得的相应压应变分别为0.0300 (TSPC-UC)、0.0453 (TSPC-GF)、0.0398 (TSPC-CF)和0.0588 (TSPC-HB)。应力应变曲线表明,与TSPC- uc相比,GFRP、CFRP和混杂FRP外强化试样增强了TSPC强度,但表现略有不同。TSPC-GF在应变较大时强度增强较小,而TSPC-CF在应变较小时强度增强较大。然而,TSPC-HB在GFRP和CFRP复合性能下表现出最高的强度增强和更大的应变效益。复合玻璃钢约束在TSPC上的破坏模式(TSPC- hb)显示了两种玻璃钢构件的破坏模式(TSPC- gf和TSPC- cf),即破裂模式和分层。本研究的结果在文献的基础上,提供了复合玻璃钢约束对TSPC圆柱样品的密切期望影响的研究结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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