Coupled effect of temperature and impact loading on tensile strength of ultra-high performance fibre reinforced concrete

Liang, Xiangwei; Wu, Chengqing; Yang, Yekai; Wu, Chengqing; Li, Zhongxian

doi:10.1016/j.compstruct.2019.111432

Cited by 36 publications

(14 citation statements)

References 28 publications

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“…Similar conclusions have been illustrated by other studies [3,9]. Further, a large number of researchers indicated that the heating temperature [3,9,10], heating rate [11] and cooling regimes [12,13] all have a significant influence on the microstructure and performance of concrete.…”

Section: Introductionsupporting

confidence: 86%

“…The disappearance of ettringite (AFt) at 100 • C, the decomposition of Calcium Silicate Hydrate (C-S-H) gel and CH at 400-600 • C, and the transformation of C-S-H gel into the nesosilicate form at 750 • C, results in the degradation and damage of concrete [6][7][8]. Similar conclusions have been illustrated by other studies [3,9]. Further, a large number of researchers indicated that the heating temperature [3,9,10], heating rate [11] and cooling regimes [12,13] all have a significant influence on the microstructure and performance of concrete.…”

Section: Introductionsupporting

confidence: 81%

“…Broken granite gravel with continuous grading was used. The crushed index, maximum particle size and apparent density of the coarse aggregate are 8.7%, 10 mm and 2.895 g/cm 3 , respectively. The fine aggregate used was natural river sand with a fineness modulus of 2.6.…”

Section: Methodsmentioning

confidence: 96%

“…However, HPC is extremely vulnerable when subjected to high temperatures due to its low porosity, low permeability and compact microstructure. For example, concrete subjected to high temperature leads to cracks and reduction in residual compressive strength [3]. Another threat that a high temperature could pose to concrete is explosive spalling [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Further, for a concrete structure, tensile strength failures under high temperatures could result in catastrophic consequences since it usually happens abruptly without any omen [5]. These all hinder the application of HPC in certain areas [3][4][5]. Under high-temperature conditions, cement-based materials are not stable due to their internal physical/chemical changes and formation of cracks.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Combined Usage of Supplementary Cementitious Materials on the Thermal Properties and Microstructure of High-Performance Concrete at High Temperatures

Tang

Zhang

et al. 2020

Materials

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Concrete has low porosity and compact microstructure, and thus can be vulnerable to high temperature, and the increasing application of various types of supplementary cementitious materials (SCMs) in concrete makes its high-temperature resistant behavior more complex. In this study, we investigate the effects of four formulations with typical SCMs combinations of fly ash (FA), ultra-fine fly ash (UFFA) and metakaolin (MK), and study the effects of SCMs combinations on the thermal performance, microstructure, and the crystalline and amorphous phases evolution of concrete subjected to high temperatures. The experimental results showed that at 400 °C, with the addition of 20% FA (wt %), the thermal conductivity of the sample slightly increased to 1.5 W/(m·K). Replacing FA with UFFA can further increase the thermal conductivity to 1.7 W/(m·K). Thermal conductivity of concrete slightly increased at 400 °C and significantly reduced at 800 °C. Further, combined usage of SCMs delayed and reduced micro-cracks of concrete subjected to high temperatures. This study demonstrates the potential of combining the usage of SCMs to promote the high-temperature performance of concrete and explains the micro-mechanism of concrete containing SCMs at high temperatures.

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Section: Introductionsupporting

confidence: 86%

Section: Introductionsupporting

confidence: 81%

Section: Methodsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Combined Usage of Supplementary Cementitious Materials on the Thermal Properties and Microstructure of High-Performance Concrete at High Temperatures

Tang

Zhang

et al. 2020

Materials

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Recent advances, challenges, and perspective of copper‐based liquid‐like thermoelectric chalcogenides: A review

Basit

Xin

Murtaza

et al. 2023

EcoMat

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As a group of emerging liquid‐like thermoelectric materials for waste heat recovery into useful energy, di‐chalcogenides Cu2(S, Se, Te) have been considered as superionic thermoelectric materials. Due to their highly disordered degree of Cu‐ion in the crystal lattice, Cu2(S, Se, Te) compounds can exhibit ultralow thermal conductivity, and in the meantime, their rigid sublattice can decently maintain the electrical performance, making them distinct from other state‐of‐the‐art thermoelectric materials. This review summarizes the well‐designed strategies to realize the impressive performance in thermoelectric materials and their modules by linking the adopted approaches such as defect engineering, interfaces, nano‐porous inclusions, thin films, dislocations, nano‐inclusions, and polycrystalline bulks etc., with the moderate design of the device. Some recent reports are selected to outline the fundamentals, underlined challenges, outlooks, and future development of Cu2(S, Se, Te) liquid‐like thermoelectric materials. We expect that this review covers the needs of future researchers in choosing some potential materials to explore thermoelectricity and other efficient energy conversion technologies.image

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Dynamic impact properties of deep sandstone under thermal-hydraulic-mechanical coupling loads

Cao,

Ding,

Zou

2024

J. Mt. Sci.

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Coupled effect of temperature and impact loading on tensile strength of ultra-high performance fibre reinforced concrete

Cited by 36 publications

References 28 publications

Effects of Combined Usage of Supplementary Cementitious Materials on the Thermal Properties and Microstructure of High-Performance Concrete at High Temperatures

Effects of Combined Usage of Supplementary Cementitious Materials on the Thermal Properties and Microstructure of High-Performance Concrete at High Temperatures

Recent advances, challenges, and perspective of copper‐based liquid‐like thermoelectric chalcogenides: A review

Dynamic impact properties of deep sandstone under thermal-hydraulic-mechanical coupling loads

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