Identification of Reactivity Level in Aggregates from Lithuanian Gravel Quarry
2017
Aurimas Rutkauskas, Džigita Nagrockienė, Gintautas Skripkiūnas, Asta Kičaitė, Giedrius Girskas

The article analyses the reactivity level of aggregates from Lithuanian quarries and their effect on the alkali corrosion in mortars. The reactivity of aggregates was assessed according to Rilem Recommended Test Method: AAR-2. The hardened cement paste and cracked aggregate contact zones were tested by means of optical microscopy. Two gravel aggregates and one sand aggregate from Lithuanian quarries were selected for testing. The tests revealed that according to AAR 2 methodology fine and coarse aggregates from Lithuanian quarries shall be allocated to Group II, i.e. reactive aggregates. The expansion after 14 days exceeds 0.1 % in the case of fine aggregate, the average expansion after 14 days is 0.13 %, and in the case of coarse aggregates the average expansion ranges from 0.11 % to 0.12 %.


Atslēgas vārdi
Alkali-aggregate reaction, alkalis, aggregates, expansion, hygroscopic gel, reactivity
DOI
10.2478/cons-2017-0008

Rutkauskas, A., Nagrockienė, D., Skripkiūnas, G., Kičaitė, A., Girskas, G. Identification of Reactivity Level in Aggregates from Lithuanian Gravel Quarry. Construction Science, 2017, Vol. 20, No. 1, 54.-59.lpp. ISSN 1407-7329. e-ISSN 2255-8551. Pieejams: doi:10.2478/cons-2017-0008

Publikācijas valoda
English (en)
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