Podrobnosti záznamu

Název
    ETTRINGITE AND THAUMASITE FORMATION CONDITIONS IN CONCRETE STRUCTURES
Autor
    Gregerová, Miroslava
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Acta Geologica Universitatis Comenianae
Svazek/č.
    Roč. 1/2007, č. 1
Strany
    6
Rok
    2007
Výraz tezauru
    aggregate
    concrete
    degradation
    ettringite
    petrography
    Thaumasite
Klíčové slovo
    CONCRETE
    CONDITIONS
    ETTRINGITE
    FORMATION
    STRUCTURES
    THAUMASITE
Abstrakt (anglicky)
   The significance of specific analytical study of cementitious materials (matrix and filling material) becomes very interesting and important during several last years. This study is focused on mineral composition of matrix in concrete, and in particular on petrographic character of aggregates. Aggregates of these samples can be divided into different groups, which mean that aggregates were formed in different geological environments or they were artificially prepared. In several samples was verified that ASR reaction precedes sulphate reaction. Because phthanites (Paleozoic silica rock) and porcelanites were observed in aggregates it had to be verified formation of ASR reaction products. Results were obtained from study of highway concrete, colcrete, expanded-clay concrete and reinforced concrete from a historical bridge structure. In samples of highway and reinforced concrete thaumasite and ettringite were observed, while in lightweight concrete only ettringite occurred.
Přispěvatel
    MU Brno, Přírodovědecká fakulta
Kód přispěvatele
    MU, PřF
Zdrojový formát
    R
Datum importu
    8. 8. 2012