Characterization of mechanical behavior and mechanism of hybrid fiber reinforced cementitious composites after exposure to high temperatures

Zeng, Deming; Cao, Mingcui; Ming, Xing

doi:10.1617/s11527-021-01622-z

Cited by 10 publications

(9 citation statements)

References 32 publications

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“…Cominoli, et al [ 31 ] found that the concrete cover can be reduced resulting in a lighter weight panel and lower transportation costs compared to a normal precast panel. Furthermore, Zeng, et al [ 32 ] investigated the hybrid fibre-reinforced cementitious composites (HFRCCs) using steel fibres, polyvinyl alcohol (PVA) fibres and calcium carbonate whisker (CW) with high temperature resistance and cost-effectiveness. They have concluded that partially replacing PVA fibres by CW could reduce the deterioration of strengths and flexural toughness.…”

Section: Introductionmentioning

confidence: 99%

Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand

et al. 2021

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Sand contaminated with crude oil is becoming a major environmental issue around the world, while at the same time, fly ash generated by coal-fired power stations is having a detrimental effect on the environment. Previous studies showed that combining these two waste materials can result in an environmentally sustainable geopolymer concrete. Incorporating sand contaminated with crude oil up to a certain level (4% by weight) can improve the mechanical properties of the produced geopolymer concrete but beyond this level can have a detrimental effect on its compressive strength. To overcome this challenge, this study introduces short fibres to enhance the mechanical properties of geopolymer mortar containing fine sand contaminated with 6% by weight of light crude oil. Four types of short fibres, consisting of twisted polypropylene (PP) fibres, straight PP fibres, short glass fibres and steel fibres in different dosages (0.1, 0.2, 0.3, 0.4 and 0.5% by volume of geopolymer mortar) are considered. The optimum strength was obtained when straight PP fibres were used wherein increases of up to 39% and 74% of the compressive and tensile strength, respectively, of the geopolymer mortar were achieved. Moreover, a fibre dosage of 0.5% provided the highest enhancement in the mechanical properties of the geopolymer mortar with 6% crude oil contamination. This result indicates that the reduction in strength of geopolymer due to the addition of sand with 6% crude oil contamination can be regained by using short fibres, making this new material from wastes suitable for building and construction applications.

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Section: Introductionmentioning

confidence: 99%

Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand

et al. 2021

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“…The value of Nuv is expressed by UV, T / UV, where UV, T is the residual Ultrasonic Pulse Velocity of the specimens after exposure, and UV is the Ultrasonic Pulse Velocity at room temperature. The NUV decreased from 200 0 C to 800 0 C for all mixes, indicating that more defects and pores are formed by the decomposition of hydrates and melting of PVA fibers [17]; but, lower loss in UPV is observed for smaller particle size.…”

Section: Ultrasonic Pulse Velocity At Various Temperaturesmentioning

confidence: 89%

“…The FA had completely melted when the temperature reached 800 0 C. In the microstructure, more micro-pores from the inner FA are exposed, and dehydrated C-S-H gels, which are completely covered in melted FA, are not visible. The microstructure is seriously deteriorated as a result of the melting of the FA and decomposition of the C-S-H gels, resulting in strength and UPV reduction, increased mass-loss rates of RS-ECC [17,33].…”

Section: Microstructure Of Compositementioning

confidence: 99%

“…The earlier research on the impact of high temperatures on ECC using micro-sized sand has yielded important insights (110-300 microns). However, characterization of the mechanical behaviour of fiber reinforced cementitious composites under high temperature is developed, in that quartz sand is used instead of micro silica sand [17]. Another study performed on high strength ECC under impact of elevated temperatures, RS of 2 mm particle size is used [18].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Elevated Temperature on Engineered Cementitious Composites using Natural River Sand

Naveen

Bhat

2022

IJE

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Engineered cementitious composites (ECC) is a recent construction material with better properties than conventional concrete. Currently, post-earthquake, fire in a building is one of the most serious disasters. The amount and size of sand used in ECC are important parameters for the performance under thermal conditions. Micro silica sand is utilized in the majority of ECC experiments related to thermal response. The study aim is to explore the impact of river sand (RS) on the ECC performance exposed to elevate temperatures up to 800 0 C, through a series of experimental tests on compressive strength, mass losses, ultrasonic pulse velocity (UPV) and microstructure. For this purpose, mixes were prepared with the incorporation of RS with varying particle sizes (2.36mm, 1.18mm, 0.60mm) instead of micro silica sand. There's no spalling in ECC containing RS of varying particle sizes. The compressive strength, mass loss and UPV all reduced with increasing temperature, according to the findings. However, RS-ECC performs better with 0.60mm than 1.18mm and 2.36mm RS.

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“…Fig. 8 Compressive strength of hybrid-FRCC as a function of temperature (data adapted from [5,18,26,27,35,40,56,58,61,67,69,70,71])…”

Section: Hybrid Fibresmentioning

confidence: 99%

Performance of fibre-reinforced cementitious composites at elevated temperatures: A review

Rawat

Lee

Zhang

2021

Construction and Building Materials

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Characterization of mechanical behavior and mechanism of hybrid fiber reinforced cementitious composites after exposure to high temperatures

Cited by 10 publications

References 32 publications

Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand

Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand

Effect of Elevated Temperature on Engineered Cementitious Composites using Natural River Sand

Performance of fibre-reinforced cementitious composites at elevated temperatures: A review

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