Impact of light mica on the intensity of the alkali-silica reactions in cement concrete pavements containing cataclased granite aggregates

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44994575%3A_____%2F24%3A10001923" target="_blank" >RIV/44994575:_____/24:10001923 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14310/24:00137366

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2214509524006727?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2214509524006727?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cscm.2024.e03521" target="_blank" >10.1016/j.cscm.2024.e03521</a>

Result language

angličtina

Original language name

Impact of light mica on the intensity of the alkali-silica reactions in cement concrete pavements containing cataclased granite aggregates

Original language description

The main goal was to determine the reaction potential of alkali-reactive aggregates containingunstable and metastable K-silicates together with quartz (predominant SiO2 polymorph) foralkali-silica reactions (ASR) in cement concrete pavements. Current methods used to determinethe expansion potential of aggregates do not solve these problems. The study of mineral paragenesisof cataclased granite by the SEM/EDX method shows that the differences in the microstructuraland microchemical composition of ASR products in the cement matrix reflect themineral variability of the rocks. The final products (crystals alkali-calcium aqueous silicates (NK)CSH), formed from alkali-silica gel (ASG), not only have different K2O contents, but analysis ofinternal and external ASG led to the finding that the K2O content is highest in cataclased graniteswith polymineral paragenesis (K-feldspar, light mica, quartz). The monomineral cataclasedgranite aggregate (crushed quartz only), its outer edge and air-voids have a significantly lower Kcontent. The highest K2O contents and at the same time lower CaO content were identified inASGs appearing in paragenesis with light mica, and crushed feldspars. Based on the results presentedin this work, it can be concluded that the presence of transformed feldspars and light micasignificantly affect both the microchemical composition of ASR products and their crystallineproduct morphology.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Case Studies in Construction Materials

ISSN

2214-5095

e-ISSN

2214-5095

Volume of the periodical

neuveden

Issue of the periodical within the volume

21

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

24

Pages from-to

1-24

UT code for WoS article

001281373100001

EID of the result in the Scopus database

2-s2.0-85199362326