Effect of high temperature on polypropylene fiber-reinforced mortars containing colemanite wastes

Durgun, Muhammed Yasin; Özen, Süleyman; Karakuzu, Kemal; Kobya, Veysel; Bayqra, Sultan Husein; Mardani‐Aghabaglou, Ali

doi:10.1016/j.conbuildmat.2021.125827

Cited by 25 publications

(13 citation statements)

References 71 publications

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“…DEM value decreased with the increase in fiber usage and fiber dosage. DEM value is affected by the properties of aggregate used, cement paste and interfacial transition zone (ITZ) 57,58 . For samples at 25°C, it was observed that the mixture with the highest DEM value was the control mixture, while the lowest DEM value was found in PP‐0.75% mixtures.…”

Section: Resultsmentioning

confidence: 99%

“…DEM value is affected by the properties of aggregate used, cement paste and interfacial transition zone (ITZ). 57,58 For samples at 25 C, it was observed that the mixture with the highest DEM value was the control mixture, while the lowest DEM value was found in PP-0.75% mixtures. It was observed that after 450 C temperature DEM values decreased with the increase of fiber ratio in fibrous mixtures.…”

Section: Ultrasonic Pulse Velocitymentioning

confidence: 92%

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Assessment of mechanical properties of fiber reinforced cementitious system exposed to high temperature

Biricik

Bayqra

Kaya

et al. 2023

Structural Concrete

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In this study, it was aimed to determine the optimum fiber type and usage ratio by examining the effect of fiber type and usage rate on the properties of mortar mixtures exposed to high temperatures such as 300°C, 450°C, and 600°C. For this purpose, mixtures were prepared by substituting polypropylene (PP), polyamide (PA) and basalt (B) fibers in proportions as 0.25%, 0.50%, 0.75%, and 1% instead of aggregate. Unit weight, compressive‐flexural strength, ultrasonic pulse velocity (UPV), and permeability properties of mixtures were determined. Regardless of fiber type, flexural strength and permeability increased, UPV decreased with the addition of fiber. Basalt fiber mixtures exhibited the highest performance in terms of flexural strength. PP fiber mixtures exhibited the best performance in terms of permeability, ultrasonic pulse velocity and dynamic modulus of elasticity. SEM analyzes showed that PP fibers exposed to 600°C melted, leading to the formation of channel voids. According to TGA result, approximately 15% mass loss was observed in the control sample at 600°C.

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Section: Resultsmentioning

confidence: 99%

Section: Ultrasonic Pulse Velocitymentioning

confidence: 92%

Assessment of mechanical properties of fiber reinforced cementitious system exposed to high temperature

Biricik

Bayqra

Kaya

et al. 2023

Structural Concrete

Self Cite

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“…The quality and quantity of the mortar affixed to the aggregate surface determines the overall material performance and properties such as the specific gravity, water absorption, and abrasion resistance [ [17] , [18] , [19] , [20] ]. Earlier studies showed that the quality of the attached mortar is improved when the recycled aggregates are derived from enhanced performance parent concrete possessing relatively higher strengths [ 19 , 21 , 22 ]. The concrete mechanical properties may be improved by reducing the water-to-binder ratio (w/b) [ [23] , [24] , [25] , [26] ].…”

Section: Introductionmentioning

confidence: 99%

Use of recycled mortar as fine aggregates in pavement concrete applications

Mardani,

Hatungimana,

Yazici

et al. 2024

Heliyon

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“…At 180–300 °C, a portion of the C–S–H gels is dehydrated. At 400–600 °C, calcium hydroxide undergoes dihydroxylation [ 21 ]. When the temperature is raised above 600 °C, calcium carbonate begins to decompose [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Polyvinyl Alcohol Fiber-Reinforced Cementitious Composites after High-Temperature Exposure

Zhang

et al. 2022

Gels

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The mechanical properties of cementitious composites before and after exposure to high temperature are affected by calcium–silicate–hydrate (C–S–H) gels. To evaluate the effects of high temperature, plyvinyl alcohol (PVA) fiber content, and the cooling method on properties of cementitious composites, physical, mechanical, and microscopic tests were performed in this study. The target temperatures were 25, 100, 200, 300, 400, 600, and 800 °C. The PVA fiber contents were 0.0, 0.3, 0.6, 0.9, 1.2, and 1.5 vol%. The high-temperature resistance of PVA fiber-reinforced cementitious composite (PVA-FRCC) specimens was investigated through changes in their appearance, mass loss, compressive strength, splitting tensile strength, flexural strength, and microstructure. The results showed that PVA fibers reduced the probability of explosion spalling in the PVA-FRCC specimens exposed to high temperatures. The mass loss rate of samples exposed to temperatures below 200 °C was small and lower than 5%, whereas a significant mass loss was observed at 200 °C to 800 °C. A small rise in the cubic compressive and splitting tensile strengths of samples was found at 400 °C and 300 °C, respectively. Below 400 °C, the fibers were beneficial to the mechanical strength of the PVA-FRCC specimens. Nevertheless, when the temperature was heated above 400 °C, melted fibers created many pores and channels, which caused a decrease in the strength of the specimens. The method of cooling with water could aggravate the damage to the cementitious composites exposed to temperatures above 200 °C. High temperature could lead to the decomposition of the C–S–H gels of the PVA-FRCC samples, which makes C–S–H gels lose their bonding ability. From the perspective of the microstructure, the structure of PVA-FRCC samples exposed to 600 °C and 800 °C became loose and the number of microcracks increased, which confirmed the reduction in macro-mechanical properties.

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Effect of high temperature on polypropylene fiber-reinforced mortars containing colemanite wastes

Cited by 25 publications

References 71 publications

Assessment of mechanical properties of fiber reinforced cementitious system exposed to high temperature

Assessment of mechanical properties of fiber reinforced cementitious system exposed to high temperature

Use of recycled mortar as fine aggregates in pavement concrete applications

Mechanical Properties of Polyvinyl Alcohol Fiber-Reinforced Cementitious Composites after High-Temperature Exposure

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