Effect of ultralight filler on the properties of hydrated lime injection grout for the consolidation of detached historic decorative plasters

Padovnik, Andreja (avtor), Bokan-Bosiljkov, Violeta (avtor)

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 grout’s strength again reduces gradually, but there is no significant change in the grout’s 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.

• Jezik: Angleški jezik
• Ključne besede: detached decorative plasters, injection grout, glass microspheres, reduced density, stability, strength, durability
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: 19 str.
• Številčenje: Vol. 13, iss. 15, art. 3360
• PID: 20.500.12556/RUL-120993
• UDK: 620.1(045)
• ISSN pri članku: 1996-1944
• DOI: 10.3390/ma13153360
• COBISS.SI-ID: 24005379
• Datum objave v RUL: 28.09.2020

Gradivo je del revije

• Naslov: Materials
• Skrajšan naslov: Materials
• Založnik: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 01.08.2020

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: odstopljeni dekorativni ometi, injekcijska mešanica, steklene mikrosfere, zmanjšana gostota, stabilnost, trdnost, obstojnost