Effect of high temperature on the microstructural evolution of fiber reinforced geopolymer composite

Samal, Sneha

doi:10.1016/j.heliyon.2019.e01779

Cited by 27 publications

(18 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Samal [106] have experimented at 200 • C and found that carbon fibre exhibits partial disintegration in fibre with the highlighted core. Nevertheless, the basalt, as well as E-glass, were found integral in position and with superior adhesion inside the mixture.…”

Section: Progression Of Adhesion Bondingmentioning

confidence: 95%

“…Samal [106] The geopolymers had a significant effect on thermal shrinkage decline as Si/Al ratios amplified due to trim down in porosity during the process of dehydroxylation as well as sintering.…”

Section: Reference Observationsmentioning

confidence: 99%

“…This monitoring links through the dilatometry scrutinises linked to the high stability to volume (Figure 3) of the mixtures Potassium based geopolymer. Samal [106], have revealed physical attributes of the fibre, matrix, and fibre reinforced geopolymer composites at room temperature. As a function of temperature at 101 and 248 • C, the DSC curve of the geopolymer composite at room temperature shows two peaks, of which, the first peak, i.e., at 101 • C helps to water vapour evaporation, dehydration, as well as the contribution of the second peak is the losses in a mass of geopolymer matrix at 248 • C temperature [121].…”

Section: Post-heating Visual Observation Of Samplesmentioning

confidence: 99%

“…According to Samal [106], the construction composite with fabrics viz., carbon, basalt and E-glass from E-wastes was subjected to a range of temperatures like 200, 400, 600, 800, 1000 • C and room temperature [RT], within a precise time period in the oven and determined the behaviour of geopolymer sans fibres specimens and geopolymer specimens with fibres at RT. Around 200 • C, due to dehydration of water, as well as evaporation of gasses from the material, there can be smaller pores and voids developed.…”

Section: Sustainability and Stability Of Geopolymer Compositementioning

confidence: 99%

“…Geopolymer specimens incorporated with 30% silica fume represent homogenous and dense microstructure with lesser crack development. Samal [106] has revealed that the geopolymer composite reinforced with fibre when exposed to higher temperature it revelations evaporation of gases and hydroxide persuading further crystallized phase of geopolymer. The crystallization phase of dense Na Al-silicate phases viz.…”

Section: Micro-structural Behaviourmentioning

confidence: 99%

See 4 more Smart Citations

Fire Resistance Behaviour of Geopolymer Concrete: An Overview

2021

View full text Add to dashboard Cite

Even though, an innovative inorganic family of geopolymer concretes are eye-catching potential building materials, it is quite essential to comprehend the fire and thermal resistance of these structural materials at a very high temperature and also when experiencing fire with a view to make certain not only the safety and security of lives and properties but also to establish them as more sustainable edifice materials for future. The experimental and field observations of degree of cracking, spalling and loss of strength within the geopolymer concretes subsequent to exposure at elevated temperature and incidences of occurrences of disastrous fires extend an indication of their resistance against such severely catastrophic conditions. The impact of heat and fire on mechanical attributes viz., mechanical-compressive strength, flexural behavior, elastic modulus; durability—thermal shrinkage; chemical stability; the impact of thermal creep on compressive strength; and microstructure properties—XRD, FTIR, NMR, SEM as well as physico-chemical modifications of geopolymer composites subsequent to their exposures at elevated temperatures is reviewed in depth. The present scientific state-of-the-art review manuscript aimed to assess the fire and thermal resistance of geopolymer concrete along with its thermo-chemistry at a towering temperature in order to introduce this novel, most modern, user and eco-benign construction materials as potentially promising, sustainable, durable, thermal and fire-resistant building materials promoting their optimal and apposite applications for construction and infrastructure industries.

show abstract

Section: Progression Of Adhesion Bondingmentioning

confidence: 95%

Section: Reference Observationsmentioning

confidence: 99%

Section: Post-heating Visual Observation Of Samplesmentioning

confidence: 99%

Section: Sustainability and Stability Of Geopolymer Compositementioning

confidence: 99%

Section: Micro-structural Behaviourmentioning

confidence: 99%

See 3 more Smart Citations

Fire Resistance Behaviour of Geopolymer Concrete: An Overview

2021

View full text Add to dashboard Cite

show abstract

Mechanical properties of ambient cured fly ash‐slag‐based engineered geopolymer composites with different types of fibers

Sheikh

Feng

et al. 2023

Structural Concrete

View full text Add to dashboard Cite

In this paper, low-strength polyvinyl alcohol (L-PVA) fibers, high-strength polyvinyl alcohol (H-PVA) fibers, and polyethylene (PE) fibers were used to prepare ambient cured fly ash-slag-based engineered geopolymer composites (EGC). The effects of fiber types and fiber volume fractions (1.5%, 1.75%, 2.0%, 2.25%, and 2.5%) on the compressive strength and tensile performance of EGC were evaluated. It was found that by increasing the fiber volume fraction from 1.5% to 2.5%, L-PVA fibers had the lowest influence, whereas PE fibers had the highest influence on the compressive strength of EGC. The optimum fiber volume fractions of L-PVA, H-PVA, and PE fibers were 1.75%, 2.25%, and 1.5%, respectively, for EGC to achieve the best tensile performance. Scanning electron microscope (SEM) investigations showed that the bonding performance of PE fibers to the EGC matrix was higher than those of L-PVA and H-PVA fibers to the EGC matrix.

show abstract