Factors affecting ASR potential of quartzite from a single quarry (Bohemian Massif, Czech Republic)

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F13%3A10193089" target="_blank" >RIV/00216208:11310/13:10193089 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Factors affecting ASR potential of quartzite from a single quarry (Bohemian Massif, Czech Republic)
Original language description
The alkali-silica reaction (ASR) originates under highly alkaline conditions in concrete, where reactive forms of SiO2 react with hydroxyl ions and alkalis, forming alkali-silica gels. Alkali-silica gels tend to absorb water molecules and expand causingdeterioration of the concrete. Quartz, a dominant component of aggregates used in concrete, exhibits variable potentials to cause ASR. This paper aims to quantify the ASR potential of quartzite aggregate sampled from the Těchobuz quarry (Moldanubian Zone, Bohemian Massif, Czech Republic). Various macroscopic and microscopic techniques (image analysis, polarising and electron microscopy, cathodoluminescence) were employed and combined with the accelerated mortar bar test. Slight variations were found inthe ASR potentials of aggregates crushed by different laboratory crushers. Parameters such as particle shape and specific surface were suggested to be responsible for these variations in the ASR potential. A higher ASR potential was measu
Czech name
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Czech description
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Project
<a href="/en/project/GAP104%2F12%2F0915" target="_blank" >GAP104/12/0915: Quantitative analysis of quartz deformation affecting ASR in concrete</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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