Mechanical and microstructural characterization of fiber reinforced fly ash based geopolymer composites

Al-mashhadani, Mukhallad M.; Canpolat, Orhan; Aygörmez, Yurdakul; Uysal, Mücteba; Erdem, Savaş

doi:10.1016/j.conbuildmat.2018.02.061

Cited by 215 publications

(99 citation statements)

References 29 publications

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“…Besides, the PPF can change the harmful macropore in AAS mortar into discontinuous and unconnected micropore, effectively block the passage of moisture escaping, and reduce the loss of moisture, thus reducing the shrinkage of AAS mortar [69]. is is in accordance with the findings of the previous studies that the addition of polypropylene fibers can reduce the drying shrinkage of geopolymer [60,70,71].…”

Section: Mechanical Propertiessupporting

confidence: 89%

“…As seen from Figures 11(a) and 11(b), there is a good bonding between the PPF and AAS paste, which provides micromechanism explanation for the addition of PPF enhancing the compressive strength of AAS mortars [75]. In addition, no obvious deformation of the PPF surface can be observed, which indicates that PPF-reinforced AAS mortar has good durability and long-term properties [70]. It can be observed from Figures 11(c) and 11(d) that PPF can offer a bridging effect over the microcracks by embedding its two thrums in the matrix, which not only improves the mechanical properties of AAS mortar but also prevents the generation and propagation of microcracks, effectively absorb and Advances in Civil Engineering dissipate the energy, and improve the crack resistance and impact resistance of the AAS mortar [60,75].…”

Section: Impact Resistancementioning

confidence: 91%

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Effect of Polypropylene Fiber on Properties of Alkali‐Activated Slag Mortar

Chen

Wang

2020

Advances in Civil Engineering

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Alkali-activated slag (AAS) is becoming an increasingly popular building material due to its excellent engineering properties and low CO 2 emissions, but its large shrinkage is an important reason to restrict its application and popularization. is work is aimed to study the possibility of inhibiting the shrinkage of AAS mortar by incorporating polypropylene fiber (PPF). For this, an experimental study was carried out to evaluate the effects of PPF content on setting time, fluidity, physical properties, mechanical properties, impact resistance, and microstructure of AAS mortar. e volume content of PPF is 0.05%, 0.1%, 0.15%, and 0.2%. e working, physical (porosity, water absorption, and bulk density), mechanical, shrinkage, and impact resistance properties of the AAS mortars were evaluated. e results show that incorporating PPF effectively reduces the shrinkage deformation of AAS mortar, significantly improves its impact resistance, enhances its toughness, and slightly improves its compressive strength in the later stage. At the same time, PPF delays the initial setting time of AAS mortar and reduces the fluidity, density, porosity, and water absorption of AAS mortar. SEM results show that the bridging effect of PPF between AAS mortars can inhibit the generation and propagation of cracks, improve the internal microstructure, and enhance the performance of AAS mortar.

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Section: Mechanical Propertiessupporting

confidence: 89%

Section: Impact Resistancementioning

confidence: 91%

Effect of Polypropylene Fiber on Properties of Alkali‐Activated Slag Mortar

Chen

Wang

2020

Advances in Civil Engineering

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“…Recent research shows that there is feasibility of using industrial waste matter as a partial substitute for commercially available alkaline solutions [7]. Geopolymer concrete is an appropriate material for structural applications, and it contains the design procedures in the present standards and codes to design the structural members with fly ash-based GPC [14]. Hardjito et al [7] experimented that curing of samples at different heat condition acting an imperative role in the process of geopolymerization in GPC.…”

Section: Introductionmentioning

confidence: 99%

“…Fly ash (FA) which higher amount in silica and alumina is one of the industrial pozzalonic by-product materials which can be used as a binder material in concrete because of its abundant quantity available worldwide, and many researchers have proven its enhanced durability, mechanical properties and microstructural compositions [3,5,14,15,17,28]. Previous research shows that there is degradation in compressive strength by replacing more than 50% of fly ash in concrete.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Aspect ratio and Volume Fraction of Steel Fibers in Strength Properties of Geopolymer Concrete

2019

IJITEE

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In this present study, a trail has been conducted to examine the influence of dissimilar aspect ratio and diverse volume fractions of steel fibers in GPC under various curing exposures on the fresh and mechanical properties. Meanwhile, the major strength performance of concrete such as compressive strength, split tensile, flexural, workability and microstructure properties were also studied. From the test results, it was revealed that in the heat curing method, there was just a low augmentation in the compressive strength at 28 years old days when compared with ambient curing condition. Then again, a radical increment in the compressive strength was recognized at 3 days on account of thermal curing because of the elevated polymerization process. The microstructure investigation illustrated that the FA and GGBS particles reacted with the alkaline activator solution and formed a denser structure in the heat curing process when compared with the room-cured specimens because of the unreacted particles present in it. The Xray diffraction pattern shows that the geopolymer particles are crystalline in nature. It was observed that the strength properties were increases with the augment in aspect ratio (Ar) and high percentage volume of steel fibers.

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Elucidating the effects of silicon carbide sludge and waste glass fiber on the characteristics of porous eco‐fireproof materials

Lin

Cheng

et al. 2021

Env Prog and Sustain Energy

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This study used silicon carbide sludge (SCS) and waste glass fiber (WGF) to prepare SCS/WGF porous (SWP) eco‐fireproof materials by a hydrogen peroxide foaming agent. The results showed that the compressive strength of samples that were cured for 1 day and had an SCS replacement level of 10% and added amounts of WGF of 0.5% and 2.0% were 0.32 and 0.46 MPa, respectively. Additionally, it was observed that the stress–strain curves were relatively extended. WGF could improve the geopolymeric matrix of the composites in terms of formation and/or redistribution of cracks by bridging cracks and perforations within the matrix. When the added amounts of WGF were 0.5% and 2.0%, the reverse‐side temperatures of the samples were 238 and 262°C, respectively, which showed that adding an appropriate amount of WGF could effectively reduce the reverse‐side temperature of SWP eco‐fireproof materials. The results displayed the beneficial influence of SCS and WGF in improving bulking density, compressive strength, and flexural strength and in reducing porosity and thermal conductivity. Therefore, the results showed that SWP eco‐fireproof materials reinforced using SCS and WGF have potential as building materials.

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Mechanical and microstructural characterization of fiber reinforced fly ash based geopolymer composites

Cited by 215 publications

References 29 publications

Effect of Polypropylene Fiber on Properties of Alkali‐Activated Slag Mortar

Effect of Polypropylene Fiber on Properties of Alkali‐Activated Slag Mortar

Effect of Aspect ratio and Volume Fraction of Steel Fibers in Strength Properties of Geopolymer Concrete

Elucidating the effects of silicon carbide sludge and waste glass fiber on the characteristics of porous eco‐fireproof materials

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