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Browsing by Subject "injection grouts"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Odporność zaczynów iniekcyjnych o zróżnicowanym w/c na korozję siarczanowo-magnezową
    (2005) Brylicki, Witold; Stryczek, Stanisław
    Setting and hardening of hydraulic binders used in drilling, mining and geotechnology are quite different from those occurring in civil, water and marine engineering. Depending on the degree of mineralization of deposit waters and their chemical composition, the cement grouts applied in mining (including salt mining) as well as those introduced by means of bore hole injection, are exposed very frequently for the extremely hard exploitation conditions. As it results from many years lasting practical experiences, the destruction of cement grouts, particularly in the magnesium sulphate environment, goes on very extensively. In this work the results of experiments on hardened grouts, produced at water to cement ratio varying in the range from 0,4 to 0,6 exposed to magnesium sulphate attack, will be reported. The following cements were taken into account: portland cement CEM I 52,5R - Górażdże, portland fly ash cement CEM II/A - V 32,5 R - Górażdże and metallurgical cement CEM III/A 32,5 NA - Strzelce Opolskie. The durability of hardened grouts in MgSO4 solutions was tested according to the Polish - European standard PN-EN 196-10.