Thermo-mechanical behavior of baritic concrete exposed to high temperature

Monte, Francesco Lo; Gambarova, Pietro G.

doi:10.1016/j.cemconcomp.2014.07.009

Cited by 39 publications

(11 citation statements)

References 14 publications

(27 reference statements)

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“…In the event of fire or nuclear accident, concrete is subjected to high temperature. Although the properties of concrete after high temperature exposure have been extensively studied [27][28][29][30][31][32], the available information on the thermal properties of sacrificial concrete is rare, and needs to be updated.…”

Section: Introductionmentioning

confidence: 99%

Effects of graphene sulfonate nanosheets on mechanical and thermal properties of sacrificial concrete during high temperature exposure

Chu

Jiang

Sun

et al. 2017

Cement and Concrete Composites

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Using nanomaterials is a new method to improve concrete material, and graphene or its derivatives are currently the most attractive nanomaterials. This paper aims to experimentally evaluate the effects of graphene sulfonate nanosheets (GSNSs) on physical, mechanical, and thermal properties of sacrificial concrete. The microstructure, porosity, compressive strength, thermal analysis, coefficient of thermal expansion, thermal diffusivity and ablation behaviour of sacrificial concrete with different contents of GSNSs before and during exposure to various temperatures up to 1000 ºC were comprehensively investigated. A new experimental apparatus was proposed and used to measure the compressive strength of sacrificial concrete during elevated temperature exposure. It was found that, (1) the compressive strength, thermal diffusivity, and decomposition enthalpy of sacrificial concrete increased by 10.14-23.11%, 6.51-27.66%, and 7.48%, respectively, when adding 0.1 wt% GSNSs; (2) the porosity and ablation velocity of sacrificial concrete reduced by 2.00-6.00% and 7.48%, respectively, due to the incorporation of GSNSs.

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Section: Introductionmentioning

confidence: 99%

Effects of graphene sulfonate nanosheets on mechanical and thermal properties of sacrificial concrete during high temperature exposure

Chu

Jiang

Sun

et al. 2017

Cement and Concrete Composites

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“…The results showed that the crushed aggregate regained a higher residual strength value. In [ 71 ], research on the thermomechanical behavior of baritic concrete exposed to high temperature was conducted, and the results showed that it behaves very similar to regular concrete. In contrast to the negligible influence of the type of aggregate in normal-weight concrete, the authors of [ 72 ] researched the influence of high temperature on heavy-weight concrete properties.…”

Section: Concrete Compositionmentioning

confidence: 99%

A Literature Review of Concrete Ability to Sustain Strength after Fire Exposure Based on the Heat Accumulation Factor

Pasztetnik

Wróblewski

2021

Materials

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Concrete is susceptible to damage during and after high-temperature exposure (most frequently in fire). The concrete partial strength re-gain after a high-temperature exposure obtained by the rehydration process is undoubtedly an advantage of this construction material. However, to use fire-damaged concrete, one has to know why the strength deteriorates and what makes the partial re-gain. Within this framework, the paper aims to find what factors influence the strength re-gain. Moreover, an attempt is made to introduce a measure collecting various influences such as the modified heat accumulation factor—accounting only for that which is important for the process, the temperature decomposing cement paste (i.e., above 400 °C). Several factors, i.e., peak temperature, heating time and rate, cooling regime, post-fire re-curing, concrete composition, age of concrete at exposure, porosity, load level at exposure, and heat accumulation are presented by their influence on the relative residual compressive strength, i.e., a portion of initial strength that is obtained after temperature exposure and strength re-gain. Since the relative strength unifies various concretes, a more general assessment and discussion are presented based on the experimental results and correlation factors. As fundamental influences determining the residual strength, the heating time, peak temperature, cooling, or post-heating re-curing regimes are found with the load level at exposure being inadequately examined. This paper also shows the superiority of the modified heat accumulation factor, but the results obtained are not satisfactory, and additional experimental data are necessary to develop a theoretical model of the residual strength.

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“…Numerous studies were carried out to investigate the variation of compressive strength and durability of concrete exposed to elevated temperature [1][2][3][4][5][6]. The deteriorations of physical properties, mechanical properties and durability of concrete were significantly affected by the exposure temperature.…”

Section: Introductionmentioning

confidence: 99%

The use of surface coating in enhancing the mechanical properties and durability of concrete exposed to elevated temperature

Yuan

2015

Construction and Building Materials

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Thermo-mechanical behavior of baritic concrete exposed to high temperature

Cited by 39 publications

References 14 publications

Effects of graphene sulfonate nanosheets on mechanical and thermal properties of sacrificial concrete during high temperature exposure

Effects of graphene sulfonate nanosheets on mechanical and thermal properties of sacrificial concrete during high temperature exposure

A Literature Review of Concrete Ability to Sustain Strength after Fire Exposure Based on the Heat Accumulation Factor

The use of surface coating in enhancing the mechanical properties and durability of concrete exposed to elevated temperature

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