The effectiveness of PFA in reducing the risk of cracking due to ASR in concretes containing cristobalite

Autor:	D. W. Hobbs
Rok vydání:	1994
Předmět:	Cracking Materials science Metallurgy Forensic engineering General Materials Science Building and Construction Cristobalite Civil and Structural Engineering Pulverized fuel ash
Zdroj:	Magazine of Concrete Research. 46:167-175
ISSN:	1751-763X 0024-9831
Popis:	Expansion results up to an age of 42 months are reported that were obtained in tests carried out at 20°C to determine the effective alkali release from pulverized fuel ash (PFA) in concretes of normal cement content containing cristobalite as the reactive constituent in the aggregate. It is shown that at an alkali content of about 3 kg/m3 the effectiveness of PFA in reducing the risk of expansion due to alkali-silica reaction depends on: (a) the alkali content of the Portland cement; (b) the proportion of the Portland cement replaced; (c) the total alkali content of the PFA. Examples are cited from the literature of affected field concretes that broadly fit the deductions made from this study.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::313716c4020f9a6dd160d62dd0a6e4f0 https://doi.org/10.1680/macr.1994.46.168.167 Zobrazit plný text záznamu