Consolidating efficiency of nanolime product CaLoSiL on porous limestone

0566900 - ÚTAM 2024 RIV CH eng J - Článek v odborném periodiku
Slížková, Zuzana - Frankeová, Dita - Drdácký, Miloš
Consolidating efficiency of nanolime product CaLoSiL on porous limestone.
Buildings. Roč. 13, č. 1 (2023), č. článku 209. E-ISSN 2075-5309
Grant CEP: GA TA ČR(CZ) TL03000603
Institucionální podpora: RVO:68378297
Klíčová slova: nanolime * calcium hydroxide * consolidation * strengthening * CaLoSiL * Maastricht limestone
Obor OECD: Materials engineering
Impakt faktor: 3.8, rok: 2022
Způsob publikování: Open access
https://doi.org/10.3390/buildings13010209

The effects of the double and the multiple application (2 to 6) of Calosil® (IBZ-Salzchemie GmbH, Halsbruecke, Germany) E25, IP 25 and E50 products were studied on Maastricht limestone, which is characterized by high porosity and large pores. Both destructive and non-destructive laboratory tests we performed in order to assess the consolidating efficiency of the nanolimes—the bending and compressive strengths, ultrasound velocity measurement, porosity determination and SEM examination. Except for the compressive strength, the other characteristics were investigated in the depth profile of stone specimens to find the distribution of the treatment product within the substrate. The performed tests showed good penetration of CaLoSiL nanolime products into the studied limestone. The bending strengths of limestone samples after double treatment using nanolime E 25, IP25 and E 50 were found to be increased by 50%, 44% and 89%, respectively, the compressive strength increased by 50%, 23% and 73%. The porosity of the stone was reduced by the treatment, but only slightly, to an acceptable extent. The higher sum of performed nanolime applications resulted in a higher strengthening effect but at the same time at the uneven distribution of the product in the stone specimen, which was followed by an increase in the strength and decrease of open porosity in the surface part. SEM examination showed a modification of the stone microstructure by the added binder.
Trvalý link: https://hdl.handle.net/11104/0338180