Počet záznamů: 1
Analysis of the mechanical and fracture behavior of heated ultra-high-performance fiber-reinforced concrete by X-ray computed tomography
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SYSNO ASEP 0509687 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Analysis of the mechanical and fracture behavior of heated ultra-high-performance fiber-reinforced concrete by X-ray computed tomography Tvůrce(i) Ríos, J. D. (ES)
Cifuentes, H. (ES)
Leiva, C. (ES)
Seitl, Stanislav (UFM-A) RID, ORCIDCelkový počet autorů 4 Zdroj.dok. Cement and Concrete Research. - : Elsevier - ISSN 0008-8846
Roč. 119, MAY (2019), s. 77-88Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova high-strength concrete ; 3-point bend tests ; steel fiber ; autogenous shrinkage ; compressive strength ; cement paste ; energy ; size ; temperature ; porosity ; Ultra-high performance concrete ; X-ray computed tomography ; Steel fibers ; High temperature ; Thermal effects ; Fracture Vědní obor RIV JN - Stavebnictví Obor OECD Civil engineering CEP GA16-18702S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UFM-A - RVO:68081723 UT WOS 000464482200008 EID SCOPUS 85062637388 DOI 10.1016/j.cemconres.2019.02.015 Anotace This work analyzes the effects of temperature (300 degrees C) on mechanical and fracture behavior of an ultra-high-performance steel-fiber-reinforced concrete. The deterioration of the pore structure due to thermal damage of the fiber-reinforced concrete and its un-reinforced matrix was analyzed by X-ray computed tomography. Complementarily, a thermogravimetric analysis was performed to relate the observed phase changes, due to dehydration and decomposition, with the deterioration of pore structure. Additionally, an analysis of their mechanical and fracture properties was also done at room temperature and 300 degrees C. Finally, a connection between the damage within the concrete matrix and its corresponding mechanical behavior was established. From the results, it has been ascertained that the propagation of thermal damage within the matrix affects the mechanical and fracture behavior in different ways depending on the pore-size. The presence of fibers modifies the pore structure and consequently the evolution of the thermal damage in the ultra-high-performance concrete, inferring its mechanical and fracture behavior. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2020 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S000888461831024X?via%3Dihub
Počet záznamů: 1