Optimization of Fresh and Mechanical Characteristics of Carbon Fiber-Reinforced Concrete Composites Using Response Surface Technique

被引:34
|
作者
Khan, Muhammad Basit [1 ]
Waqar, Ahsan [1 ]
Bheel, Naraindas [1 ]
Shafiq, Nasir [1 ]
Sor, Nadhim Hamah [2 ,3 ]
Radu, Dorin [4 ]
Benjeddou, Omrane [5 ]
机构
[1] Univ Teknol PETRONAS, Dept Civil & Environm Engn, Tronoh 32610, Perak, Malaysia
[2] Univ Garmian, Civil Engn Dept, Kalar 46021, Kurdistan Regio, Iraq
[3] Harran Univ, Dept Civil Engn, TR-63510 Sanliurfa, Turkiye
[4] Transilvania Univ Brasov, Fac Civil Engn, Turnului St 5, Brasov 500156, Romania
[5] Prince Sattam Bin Abdulaziz Univ, Coll Engn, Dept Civil Engn, Alkharj 16273, Saudi Arabia
关键词
carbon fiber; concrete; mechanical properties; embodied carbon; response surface methodology; DESIGN; GEOPOLYMER; TOOL; ASH;
D O I
10.3390/buildings13040852
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
As a top construction material worldwide, concrete has core weakness relating to low tensile resistance without reinforcement. It is the reason that a variety of innovative materials are being used on concrete to overcome its weaknesses and make it more reliable and sustainable. Further, the embodied carbon of concrete is high because of cement being used as the integral binder. Latest research trends indicate significant potential for carbon fiber as an innovative material for improving concrete mechanical strength. Although significant literature is available on the use of carbon fiber in concrete, a limited number of studies have focused on the utilization of carbon fiber for concrete mechanical strength improvement and the reduction of embodied carbon. Following the gap in research, this study aimed to investigate and optimize the use of carbon fiber for its mechanical characteristics and embodied carbon improvements. The use of carbon fiber in self-compacting concrete lowers sagging. The greatest quantity of carbon fiber is that it reduces the blockage ratio, forcing the concrete to solidify as clumps develop. With time, carbon fiber improves the durability of concrete. Self-compacting concrete with no carbon fiber has a poor tensile strength. Experiments were conducted by adding carbon fiber at 0.2%, 0.4%, 0.6%, 0.8%, and 1.0% by weight. Fresh concrete tests including slump test and L-box test, hardened concrete tests involving compressive strength and splitting tensile strength, and durability tests involving water absorption and acid attack test were conducted. Embodied carbon ratios were calculated for all of the mix ratios and decreasing impact, in the form of eco-strength efficiency, is observed with changes in the addition of carbon fiber in concrete. From the testing results, it is evident that 0.6% carbon fiber is the ideal proportion for increasing compressive strength and split tensile strength by 20.93% and 59%, respectively, over the control mix. Response Surface Methodology (RSM) is then applied to develop a model based on results of extensive experimentation. Optimization of the model is performed and final modelled equations are provided in terms of calculating the impact of addition of carbon fiber in concrete. Positive implications are devised for the development of concrete in the future involving carbon fiber.
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页数:28
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