Investigation on Mode I Fracture Behavior of Hybrid Fiber-Reinforced Geopolymer Composites

Asrani, Neha P.; Murali, G.; Abdelgader, Hakim S.; Parthiban, K.; Haridharan, M. K.; Karthikeyan, K.

doi:10.1007/s13369-019-04074-4

Cited by 34 publications

(10 citation statements)

References 45 publications

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“…Previous studies that used steel fiber, polypropylene fiber and other synthetic fibers revealed a distinguished superiority of steel fibers, both in mono-fashion or when combined with synthetic fibers, where it could better improve the stiffness, tensile strength, flexural strength, ductility, shear strength and energy absorbance capacity [ 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ], which totally supports the obtained results in this research. Scorza et al [ 44 ] tested different combinations of different length steel and polypropylene fibers and indicated that steel mono-fiber reinforced mixture retained the best fracture results and post-peak performance under mode I fracture test.…”

Section: Resultssupporting

confidence: 90%

Evaluation of Mode II Fracture Toughness of Hybrid Fibrous Geopolymer Composites

et al. 2021

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This research aims to examine the fracture toughness of hybrid fibrous geopolymer composites under mode II. For this purpose, eight geopolymer mixtures were cast and tested to evaluate the influence of steel and synthetic fiber hybridization on mode II fracture response. The first mixture was plain and was kept as a reference, while steel, polypropylene and glass fibers were used in the rest seven mixtures. The first three of which were mono-reinforced with one of the three fibers, while the rest of the four were hybrids reinforced with combinations of steel and synthetic fibers. The Brazilian center notched disc and the double notched cube test configurations were used to evaluate the mode II fracture toughness of the eight mixtures. The results of the tests showed that steel fibers played the vital role in enhancing the fracture toughness, where the mixtures S1.6 and S1.3G0.3 showed the best performance. The results also showed that increasing the notch depth decreased the fracture toughness with an approximate linear decrement fashion. It was found that the use of double-notched cubes resulted in much higher fracture toughness than the Brazilian notched discs, where the ratio of normalized fracture toughness of the disc specimens to cube specimens was approximately 0.37 to 0.47. This is attributed to the concentration of stresses along one defined path in the disc specimens compared to the multi-path stresses in the cube specimens. In addition, the accompanied tensile stresses in the disc specimens may lead to a mode I fracture before the designed mode II fracture.

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Section: Resultssupporting

confidence: 90%

Evaluation of Mode II Fracture Toughness of Hybrid Fibrous Geopolymer Composites

et al. 2021

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“…Steel fibers combined with plastic fibers are most often used in this type of reinforcement. An example of this type of reinforcement is the use of short steel and PP fibers [37,[74][75][76][77].…”

Section: Use Of Synthetic Fibers In Hybrid Reinforcementmentioning

confidence: 99%

Mechanical Properties of Short Polymer Fiber-Reinforced Geopolymer Composites

2020

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The article describes the state of the art in reinforced geopolymers, taking into consideration various types of polymer fiber reinforcements, such as polypropylene, polyethylene, or polylactic acid. The description is focused on the usage of polymer short fibers and the mechanical properties of the geopolymer composites. However, to show a wider research background, numerous references are discussed concerning the selected studies on reinforcing geopolymer composites with long fibers and fabrics. The research method applied in the article is the critical analysis of literature sources, including a comparison of new material with other materials used in similar applications. The results of the research are discussed in a comparative context and the properties of the composites are juxtaposed with the properties of the standard materials used in the construction industry. Potential applications in the construction industry are presented. Moreover, the contemporary research challenges for geopolymer materials reinforced with fibers are presented.

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“…As a result, the concrete's residual strength is enhanced by stress transmission via the fractured region. Furthermore, the inclusion of SPF bridged micro-cracks and slowed their growth as a result of friction bonding between the fibres and matrix [44].…”

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confidence: 99%

Investigations on the Response of Novel Layered Geopolymer Fibrous Concrete to Drop Weight Impact

2022

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In recent years, geopolymer concrete (GC) has become more popular in construction because of its multiple benefits, such as eco-friendliness, high temperature resistance and resistance to chemical attack in harsh environments. However, GC has limited deformation capability and tensile strength compared to ordinary concrete. Geopolymer fibrous concrete (GFC) exhibits high mechanical properties, such as compressive strength and impact strength. This study aimed to develop a novel composite comprising GFC at the tension zone and GC at the compression zone, and vice versa, are these composites were examined. The impact resistance of two-layered GC-GFC with various ratios (25–75, 50–50, 75–25%) was examined. In addition, a single layer specimen comprising GC and GFC was fabricated and tested as the reference specimen. Twenty-nine mixtures were developed and divided into four series. Four different types of fibre were used in this study; short polypropylene fibre, long polypropylene fibre, short steel fibre and long steel fibre. The ACI committee 544 drop weight test was used to evaluate the impact strength of specimens. Results indicated that the impact strength of GFC was significantly improved in long steel fibre-based specimens. In addition, two-layered specimens comprising different fibres—short polypropylene, long polypropylene, short steel and long steel—exhibited a positive influence on impact strength. Compared to a single-layer specimen, inferior impact strength was recorded in the two-layered specimen.

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Investigation on Mode I Fracture Behavior of Hybrid Fiber-Reinforced Geopolymer Composites

Cited by 34 publications

References 45 publications

Evaluation of Mode II Fracture Toughness of Hybrid Fibrous Geopolymer Composites

Evaluation of Mode II Fracture Toughness of Hybrid Fibrous Geopolymer Composites

Mechanical Properties of Short Polymer Fiber-Reinforced Geopolymer Composites

Investigations on the Response of Novel Layered Geopolymer Fibrous Concrete to Drop Weight Impact

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