Deterioration of performances and structures of cement pastes under the action of thermal cycling fatigue

Zeng, Haoyu; Li, Wen-Wei; Jin, Ming; Zhang, Jian; Ma, Yuefeng; Lu, Chenyang; Liu, Jiaping

doi:10.1016/j.ijfatigue.2022.107181

Cited by 23 publications

(2 citation statements)

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“…It was indicated in the literature that thermal cycling changed the pore size distribution of the cement matrix. The rehydration reaction refined the pore structure then followed by an increase in total porosity and coarsening of the pore structure (Huang et al, 2019; Zheng et al, 2022). The reason of this result is explained as the most important component of concrete is hardened cement paste, which is mainly composed of crystals, amorphous products, and pores generated by the hydration reaction of cement (Shi and Zhao, 2021).…”

Section: Resultsmentioning

confidence: 99%

“…An experimental research reported that compressive strength continuously declined as the thermal cycles (between 5°C–45°C) lengthen. The compressive strength of O-4, O-5, and O-6 (w/c) ratios decreased by 23.14%, 36.14%, and 37.9%, respectively, after 1000 cycles (Zeng et al, 2022). It was reported that cement matrix exposed to thermal cycling operation between 20°C–65°C the compressive strength first increased and reached a maximum around 150 cycles, and then decreased after 330 cycles (Huang et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

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Thermal fatigue behavior of reinforced concrete column used as heater and energy storage

Özrahat

Dirikgil

Ünalan

2023

Advances in Structural Engineering

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In this study, the damage effects of a new building heating system that activates the reinforced concrete columns (RC) which are the structural elements of the building by thermal cycles were investigated. The research was carried out experimentally on real-time data. The thermal fatigue effect that will occur after the structural RC is exposed to repeated thermal cycles was evaluated with the lateral cyclic loading test. The effect of the applied thermal cycles on the microstructure of the concrete was also tried to be observed. According to the data obtained in this study, in the preferred concrete type and geometry, the mechanical performance of the RC was not adversely affected at preferred operating temperatures and the number of applied thermal cycles. The results obtained are very promising in terms of the applicability of the new system as a preliminary study. In the proposed system, structural elements will be used as heater and energy storage throughout the life of the building. Therefore, it is essential to predict the exact thermal stress and strain values that the RC will be exposed to, and most importantly, the thermal fatigue life of the structural element under different parameters by future work.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%