Mechanical and physicochemical properties of ferro-siliceous concrete subjected to elevated temperatures

Chu, Hsin; Jiang, Jiuchuan; Sun, Wei; Zhang, Mingzhong

doi:10.1016/j.conbuildmat.2016.06.104

Cited by 33 publications

(25 citation statements)

References 27 publications

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“…The mixtures of sacrificial concrete used in the paper were carefully designed according to our previous research findings, as shown in literature [25]. Based on these results, the mixtures of sacrificial concrete for this work were further improved via the addition of GSNSs, and are shown in Table 4.…”

Section: Proportions Of Sacrificial Concretementioning

confidence: 99%

“…Sacrificial concrete is designed to reduce the leakage potential of radioactive materials in severe nuclear accidents [25]. On one hand, sacrificial concrete can melt and mix with corium (a molten mixture of fuel material, partially or totally oxidized cladding, non-volatile fission products, and various structural materials), reducing the temperature of corium.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the SiO2 from sacrificial concrete can oxidize Zr in the corium, and the glassily matrix formed by molten SiO2 can enwrap the radioactive fission products [26]. The core technical parameters of sacrificial concrete are as follows, (1) the silica sand should contain SiO2≥83 wt%, CaCO3≤8.5 wt%, and MgCO3≤1 wt%, respectively; (2) in the mixtures of sacrificial concrete, the content of silica sand (including dry parts of admixtures and additives) should reach 85% of total dry mass of sacrificial concrete; (3) the slump flow is supposed to be in the range of 55 to 65 cm for fresh sacrificial concrete; (4) after curing, the free water content and compressive strength should be less than 5%, and more than 30 MPa, respectively; (5) when exposed to high temperatures, the sacrificial concrete should guarantee the integrity up to 1000 ºC [25].…”

Section: Introductionmentioning

confidence: 99%

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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: Proportions Of Sacrificial Concretementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Self Cite

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“…In addition, the relationships between mechanical strengths and UPV of HPCs were different from those of ferro-siliceous concretes, and the compressive strength-UPV and splitting tensile strength-UPV relationships of ferro-siliceous concretes were Weibull distribution and exponential form, respectively [34]. Maybe that was because the deterioration of ferro-siliceous concretes was due to high temperature.…”

Section: Relationships Between Strengths and Upvmentioning

confidence: 98%

Assessment of Mechanical Properties and Damage of High Performance Concrete Subjected to Magnesium Sulfate Environment

Cang

Bao

2017

Advances in Materials Science and Engineering

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Sulfate attack is one of the most important problems affecting concrete structures, especially magnesium sulfate attack. This paper presents an investigation on the mechanical properties and damage evolution of high performance concrete (HPC) with different contents of fly ash exposure to magnesium sulfate environment. The microstructure, porosity, mass loss, dimensional variation, compressive strength, and splitting tensile strength of HPC were investigated at various erosion times up to 392 days. The ultrasonic pulse velocity (UPV) propagation in HPC at different erosion time was determined by using ultrasonic testing technique. A relationship between damage and UPV of HPC was derived according to damage mechanics, and a correlation between the damage of HPC and erosion time was obtained eventually. The results indicated that (1) the average increasing amplitude of porosity for HPCs was 34.01% before and after exposure to magnesium sulfate solution; (2) the damage evolution of HPCs under sulfate attack could be described by an exponential fitting; (3) HPC containing 20% fly ash had the strongest resistance to magnesium sulfate attack.

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“…Although extensive research on the behaviour of concrete subjected to high temperatures has been reported so far [30][31][32][33][34], investigation on the thermal properties of sacrificial concrete is rare, especially on its mechanical properties during elevated temperature exposure. Chu et al [35] have recently carried out a systematic study on mechanical and physicochemical properties of ferro-siliceous sacrificial concrete after high temperature exposure, and observed that the compressive strength-ultrasonic pulse velocity (UPV) and splitting tensile strength-UPV relationships followed a Weibull distribution and was in exponential form, respectively.…”

mentioning

confidence: 99%

Mechanical and thermal properties of graphene sulfonate nanosheet reinforced sacrificial concrete at elevated temperatures

Chu

Sun

Zhang

2017

Construction and Building Materials

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Progress in the field of nanomaterials presents an opportunity to improve the performance of cementitious composites via graphene or its derivatives. This paper presents an experimental study on mechanical and thermal properties of sacrificial concrete without and with graphene sulfonate nanosheets (GSNSs) during high temperature exposure. The microstructure, porosity, mechanical strengths, thermal analysis, coefficient of thermal expansion, thermal diffusivity and ablation behaviour of sacrificial concrete during exposure to various temperatures up to 1000 ºC were comprehensively investigated. Two new experimental apparatuses were developed and used to measure mechanical strengths of sacrificial concrete at elevated temperatures. It was found that the compressive strength, splitting tensile strength, thermal diffusivity and decomposition enthalpy of sacrificial concrete were increased by 12. 98-25.36%, 8.66-34.38%, 25.00-103.23% and 4.23% respectively when adding 0.1 wt% GSNSs, while the porosity and ablation velocity of sacrificial concrete were reduced by 3.01-6.99% and 4.14% respectively due to the incorporation of GSNSs.

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Mechanical and physicochemical properties of ferro-siliceous concrete subjected to elevated temperatures

Abstract: 1 / 24 Mechanical and physicochemical properties of ferro-siliceous concrete subjected to elevated temperatures

Cited by 33 publications

References 27 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

Assessment of Mechanical Properties and Damage of High Performance Concrete Subjected to Magnesium Sulfate Environment

Mechanical and thermal properties of graphene sulfonate nanosheet reinforced sacrificial concrete at elevated temperatures

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