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  • Effect of ultralight filler on the properties of hydrated lime injection grout for the consolidation of detached historic decorative plasters [Elektronski vir]
    Padovnik, Andreja, 1983- ; Bokan-Bosiljkov, Violeta
    Injection-grout density is an important parameter when its additional weight leads to consolidated decorative plasters becoming damaged. This is especially evident in larger detached areas. In this ... study, thin-walled soda lime borosilicate glass microspheres were used as a density-reducing constituent in hydrated lime grout mixtures. The normal density grout composition one volume part hydrated lime and three volume parts inert limestone filler with 0.5% of the polycarboxylate ether-based superplasticiser was modified with partial substitution of the limestone filler with lightweight glass microspheres. The following volumetric proportions between limestone filler and glass microspheres were used: 100%:0%, 67%:33%, 50%:50%, 33%:67%, and 0%:100%. With the increase of the glass microspheres volume, the density of the grout is gradually reduced. Furthermore, there is a decrease in the stability and injectability of fresh grout. In its hardened state, the grouts strength again reduces gradually, but there is no significant change in the grouts water absorption and water-vapour resistance. The resistance of the grout to freezing thawing and heating cooling cycles using distilled water or salt solution is highly improved when the microspheres are present.
    Source: Materials [Elektronski vir]. - ISSN 1996-1944 (Vol. 13, iss. 15, 2020, str. 1-19)
    Type of material - e-article ; adult, serious
    Publish date - 2020
    Language - english
    COBISS.SI-ID - 24005379

    Link(s):

    https://www.mdpi.com/1996-1944/13/15/3360
    Repository of the University of Ljubljana – RUL
    DOI

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