Behaviour of high-strength concrete with dolomitic aggregate at high temperatures

Autor:	I. Janotka, T. Nürnbergerová, L. Nad
Rok vydání:	2000
Předmět:	Cement Aggregate (composite) Materials science Silica fume Dolomite Building and Construction law.invention Portland cement Properties of concrete law General Materials Science Geotechnical engineering Composite material Porosity Hydrate Civil and Structural Engineering
Zdroj:	Magazine of Concrete Research. 52:399-409
ISSN:	1751-763X 0024-9831
DOI:	10.1680/macr.2000.52.6.399
Popis:	Tests were carried out on concrete with normal Portland cement, silica fume and dolomitic aggregate subjected to temperatures of 20–800°C to determine the effect of temperature on the phase composition and pore structure development, and physico-mechanical properties of concrete specimens. It is shown that the reduction in hydrate phase volume is connected with the pore structure coarsening manifested by the evident growth in pore median radius and total porosity values. Damage to the structural integrity of concrete is markedly influenced by the level of temperature elevation. This process is described by a three-stage model which incorporates deductions made from this study and those cited from the literature of similarly affected concretes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::51d1d1aee561457970e2bec1159b5662 https://doi.org/10.1680/macr.2000.52.6.399 Zobrazit plný text záznamu