Influence of steel and PP fibers on mechanical and microstructural properties of fly ash-GGBFS based geopolymer composites

Bellum, Ramamohana Reddy

doi:10.1016/j.ceramint.2021.11.232

Cited by 49 publications

(49 citation statements)

References 43 publications

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“…The high shear resistance of fiber-reinforced polymer is more widely used on walls. According to the study of Harry et al [13], the tested composite polyvinyl alcohol fiber wrapped macroscopic synthetic fiber reinforced concrete wall samples present significantly higher values of interfacial shear strength compared with the test wall samples filled with ordinary concrete. The maximum shear load and interfacial shear strength increases by 93.5%.…”

Section: Shear Strengthmentioning

confidence: 99%

“…With the increase of polypropylene fiber content, the decrease in strength is attributed to the formation of interpolymer voids and weak interfacial bonding zone. Murthy's study shows that 1% is the best content for polypropylene fiber to improve the compressive strength of geopolymer [35], while Bellum's research indicates that 2% is the best content for polypropylene fiber to improve the compressive strength of geopolymer [13], and Wang's study considers 0.8% polyvinyl alcohol fiber the best dosage to improve the compressive strength of geopolymer. However, Wang and Li's study indicates that a higher polypropylene fiber content represents a higher compressive strength [18] [37].…”

Section: Compressive Strengthmentioning

confidence: 99%

“…In the case of a PP fiber dosage of 2%, the flexural strength of the matrix can be greatly improved. Ramamohana [13] found that after adding polypropylene fiber and steel fiber, the bending strength in Day 28 increases by 26.36 % and 57.79 %, respectively, compared with that of pure slurry geopolymer. Chuan Wang [14] found that polypropylene, glass and basalt fiber can increase the flexural strength of pure paste by 16.07 %, 30.35 % and 35.36 %, respectively.…”

Section: Flexural Strengthmentioning

confidence: 99%

“…6. Effect of fiber content on the tensile strength of geopolymer [13,21,22,36,40,45,46] The tensile strength of the geopolymer increases with the addition of steel fiber because of its greater rigidity.…”

Section: Tensile Strengthmentioning

confidence: 99%

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Mechanical properties and durability of fiber reinforced geopolymer composites: A review on recent progressd

Qin

Yan

Zhou

et al. 2022

Preprint

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Geopolymer concrete shares similar mechanical properties with ordinary Portland cement (OPC) concrete, and is even provided with better performances in high temperature and high corrosion circumstances. However, geopolymer binder is still subject to the disadvantages of large shrinkage and high brittleness, which greatly limit its application. Fiber reinforcement is widely used in various geopolymer systems to overcome the brittleness issue, but retains the high strength. Over the past 10 years, a significant advance has been made in the research of fiber reinforced geopolymers in terms of toughening efficiency and durability improvement. This paper, as a mini review, focuses on three types of fibers, i.e., inorganic fiber, natural fiber and synthetic fiber, in geopolymers, and their specific effects on compressive, flexural and tensile strengths, fractural toughness, shear strength and durability including shrinkage, chemical and freezing-thaw resistances. The recement understanding of bonding mechanism and fiber-geopolymer interface are also discussed, and knowledge gaps and future work challenges are correspondingly pointed out.

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Section: Shear Strengthmentioning

confidence: 99%

Section: Compressive Strengthmentioning

confidence: 99%

Section: Flexural Strengthmentioning

confidence: 99%

Section: Tensile Strengthmentioning

confidence: 99%

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Mechanical properties and durability of fiber reinforced geopolymer composites: A review on recent progressd

Qin

Yan

Zhou

et al. 2022

Preprint

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show abstract

“…Reinforcing these materials with different kinds of fibres, such as synthetic, steel, or natural fibres, is one of the most common methods to overcome these weaknesses. Besides, many researchers claimed that geopolymer composites had greater material greenness than traditional cement and that fibre reinforcing can improve their ductility and durability (Bellum, 2021).…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Natural Fibre Reinforced Geopolymer Composites: A Review

Al-Ghazali¹,

Aziz²,

Abdan³

et al. 2022

JST

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The cement production consumes many natural resources and energy, pollutes the environment, and cannot meet the current building materials’ green and sustainable development requirements. Therefore, geopolymers have gained popularity as cement replacements in recent years. Geopolymers have promising characteristics such as low energy consumption and carbon footprint, valuable compressive strength, fire resistance, flame resistance and good durability. However, these materials suffer from low tensile and flexural strength. Hence, fibres are added to overcome these issues and enhance their toughness index. Natural fibres are biodegradable, low-cost, renewable materials and widely available in many countries. This article reviewed previous Natural Fibre Reinforced Geopolymer Composites (NFRGC) studies, focusing on compressive strength, tensile and flexural strengths, and toughness. In addition, the available literature on the effect of the treatment methods of natural fibres on the mechanical properties of NFRGC has been addressed. The findings indicate that adding the appropriate type and content of natural fibres to geopolymer composites can enhance their mechanical properties. However, more attention should be paid to the effects of the pre-treatment of natural fibres on the performance of NFRGC.

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The influence and mechanism of elastomer types on electrical and mechanical properties of polypropylene insulation materials for high voltage cables

Li,

Chen,

Liu

et al. 2023

J of Applied Polymer Sci

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Polypropylene (PP) becomes a superior candidate material for new environmentally friendly cable main insulation with its excellent heat resistance, electrical properties, and degradability. However, in practical application, PP material is aging and vulnerable and its toughness is poor. The mechanical properties of PP material can be improved by elastomer modification, but the effects of different elastomers on the comprehensive properties of composite specimens are quite different. In this paper, the electrical and mechanical properties of different types of elastomer‐modified PP composites are compared and analyzed by combining experimental and molecular simulation (MS) methods. The experimental results show that the SEBS/PP composite material has the lowest trap energy levels among all kinds of composite materials, its space charge accumulation is 1.96 × 10−9C, and the mechanical and rheological properties improvement of the composite is the most remarkable. Meanwhile, the volume resistivity is reduced by two orders of magnitude compared with pure PP. However, the breakdown strength of all kinds of composite materials decreases by different degrees after the modification. The solubility parameters (δ) and the free volume are further investigated by the molecular simulation, which shows that the δ of SEBS is similar to that of PP, which represents the best compatibility. Moreover, the SEBS/PP composite material has the strongest inter‐molecular force and the most excellent toughness improvement for PP. This work provides a theoretical basis for elastomer selection in PP modification.

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Influence of steel and PP fibers on mechanical and microstructural properties of fly ash-GGBFS based geopolymer composites

Cited by 49 publications

References 43 publications

Mechanical properties and durability of fiber reinforced geopolymer composites: A review on recent progressd

Mechanical properties and durability of fiber reinforced geopolymer composites: A review on recent progressd

Mechanical Properties of Natural Fibre Reinforced Geopolymer Composites: A Review

The influence and mechanism of elastomer types on electrical and mechanical properties of polypropylene insulation materials for high voltage cables

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