Urška Dolinar (Author), Tomaž Hozjan (Author), Gregor Trtnik (Author)

Abstract

In this paper the possibility of using different regression models to predict the mechanical properties of limestone concrete after exposure to high temperatures, based on the results of non-destructive techniques, that could be easily used in-situ, is discussed. Extensive experimental work was carried out on limestone concrete mixtures, that differed in the water to cement (w/c) ratio, the type of cement and the quantity of superplasticizer added. After standard curing, the specimens were exposed to various high temperature levels, i.e., 200%, 400%, 600% or 800%. Before heating, the reference mechanical properties of the concrete were determined at ambient temperature. After the heating process, the specimens were cooled naturally to ambient temperature and tested using non-destructive techniques. Among the mechanical properties of the specimens after heating, known also as the residual mechanical properties, the residual modulus of elasticity, compressive and flexural strengths were determined. The results show that residual modulus of elasticity, compressive and flexural strengths can be reliably predicted using an artificial neural network approach based on ultrasonic pulse velocity, residual surface strength, some mixture parameters and maximal temperature reached in concrete during heating

Keywords

gradbeništvo;mehanske lastnosti;tlačna trdnost;umetne nevronske mreže;beton;požarno obnašanje;residual mechanical properties;compressive strength;artificial neural network;non-destructive testing techniques;fire behavior;concrete;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
UDC: 624
COBISS: 29330179 Link will open in a new window
ISSN: 2287-531X
Views: 429
Downloads: 54
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: gradbeništvo;mehanske lastnosti;tlačna trdnost;umetne nevronske mreže;beton;požarno obnašanje;
Type (COBISS): Scientific work
Embargo end date (OpenAIRE): 0000-00-00
Pages: str. 247-256
Volume: ǂLetn. ǂ10
Issue: ǂšt. ǂ3
Chronology: 2020
DOI: 10.12989/acc.2020.10.3.247
ID: 12048584