Experimental behaviour of sisal and kenaf fibre reinforced concrete

Abirami, R.; Sangeetha, S.; Nadeemmishab, K.; Vaseem, P. Yasir; Sad, K. Suhail

doi:10.1063/5.0024771

Cited by 14 publications

(2 citation statements)

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“…After the matrix cracked, the stress decreased rapidly, resulting in a brittle fracture of the specimen [127]. The presence of an appropriate amount of fiber changed the bending behavior of the GP matrix [128][129][130]. It was also found that the residual strength of treated and untreated fiber-reinforced cement-based composites after matrix cracking had similar values, indicating that an alkali treatment cannot significantly improve the bending resistance of the SFRG.…”

Section: Flexural Performancementioning

confidence: 99%

A Review of Sisal Fiber-Reinforced Geopolymers: Preparation, Microstructure, and Mechanical Properties

Qu,

Niu,

et al. 2024

Molecules

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The early strength of geopolymers (GPs) and their composites is higher, and the hardening speed is faster than that of ordinary cementitious materials. Due to their wide source of raw materials, low energy consumption in the production process, and lower emissions of pollutants, they are considered to have the most potential to replace ordinary Portland cement. However, similar to other inorganic materials, the GPs themselves have weak flexural and tensile strength and are sensitive to micro-cracks. Improving the toughness of GP materials can be achieved by adding an appropriate amount of fiber materials into the matrix. The use of discrete staple fibers shows great potential in improving the toughness of GPs. Sisal is a natural fiber that is reproducible and easy to obtain. Due to its good mechanical properties, low cost, and low carbon energy usage, sisal fiber (SF) is a GP composite reinforcement with potential development. In this paper, the research progress on the effect of SF on the properties of GP composites in recent decades is reviewed. It mainly includes the chemical composition and physical properties of SFs, the preparation technology of sisal-reinforced geopolymers (SFRGs), the microstructure analysis of the interface of SFs and the GP matrix, and the macroscopic mechanical properties of SFRGs. The properties of SFs make them have good bonding properties with the GP matrix. The addition of SFs can improve the flexural strength and tensile strength of GP composites, and SFRGs have good engineering application prospects.

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Section: Flexural Performancementioning

confidence: 99%

A Review of Sisal Fiber-Reinforced Geopolymers: Preparation, Microstructure, and Mechanical Properties

Qu,

Niu,

et al. 2024

Molecules

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“…Abbas et al [ 31 ] discussed the improvement of tensile strength and flexural strength of cementitious composites by appropriate content and length of kenaf fibers. Abirami et al [ 32 ] added 0.25-1% of different types of kenaf or sisal fibers to cement-based composites. The results showed that the compressive strength and tensile strength of the two fibers increased by 6.5%, and 12.7%, respectively.…”

Section: Introductionmentioning

confidence: 99%

The Mechanical Properties of Plant Fiber-Reinforced Geopolymers: A Review

Liu

Guo

et al. 2022

Polymers

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Both geopolymer and plant fiber (PF) meet the requirements of sustainable development. Geopolymers have the advantages of simple preparation process, conservation and environmental protection, high early strength, wide source of raw materials, and low cost. They have broad application prospects and are considered as the most potential cementitious materials to replace cement. However, due to the ceramic-like shape and brittleness of geopolymers, their flexural strength and tensile strength are poor, and they are sensitive to microcracks. In order to solve the brittleness problem of geopolymers, the toughness of composites can be improved by adding fibers. Adding fibers to geopolymers can limit the growth of cracks and enhance the ductility, toughness and tensile strength of geopolymers. PF is a good natural polymer material, with the advantages of low density, high aspect ratio. It is not only cheap, easy to obtain, abundant sources, but also can be repeatedly processed and biodegradable. PF has high strength and low hardness, which can improve the toughness of composites. Nowadays, the research and engineering application of plant fiber-reinforced geopolymers (PFRGs) are more and more extensive. In this paper, the recent studies on mechanical properties of PFRGs were reviewed. The characteristics of plant fibers and the composition, structure and properties of geopolymers were reviewed. The compatibility of geopolymer material and plant fiber and the degradation of fiber in the substrate were analyzed. From the perspective of the effect of plant fibers on the compression, tensile and bending properties of geopolymer, the reinforcing mechanism of plant fibers on geopolymer was analyzed. Meanwhile, the effect of PF pretreatment on the mechanical properties of the PFRGs was analyzed. Through the comprehensive analysis of PFFRGs, the limitations and recommendations of PFFRG are put forward.

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