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Article

Mortars with Crushed Lava Granulate for Repair of Damp Historical Buildings

1
Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, CZ-166 29 Prague, Czech Republic
2
Institute of Chemistry, Faculty of Civil Engineering, Brno University of Technology, Veveří 331/95; 602 00 Brno, Czech Republic
*
Author to whom correspondence should be addressed.
Materials 2019, 12(21), 3557; https://doi.org/10.3390/ma12213557
Received: 17 September 2019 / Revised: 25 October 2019 / Accepted: 28 October 2019 / Published: 30 October 2019
In this paper, crushed lava granulate was used as full silica sand replacement in composition of repair mortars based on hydrated lime, natural hydraulic lime, or cement-lime binder. Lava granules were analyzed by X-ray fluorescence analysis (XRF), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Particle size distribution of both silica and lava aggregates was assessed using standard sieve analysis. Hygrothermal function of the developed lightweight materials was characterized by the measurement of complete set of hygric, thermal, and structural parameters of the hardened mortar samples that were tested for both 28 days and 90 days cured specimens. As the repair mortars must also meet requirements on mechanical performance, their compressive strength, flexural strength, and dynamic Young’s modulus were tested. The newly developed mortars composed of lava aggregate and hydrated lime or natural hydraulic lime met technical, functional, compatibility, and performance criteria on masonry and rendering materials, and were found well applicable for repair of historically valuable buildings. View Full-Text
Keywords: repair mortars; compatibility; lava granulate; functional properties; hygrothermal performance repair mortars; compatibility; lava granulate; functional properties; hygrothermal performance
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MDPI and ACS Style

Pavlík, Z.; Pokorný, J.; Pavlíková, M.; Zemanová, L.; Záleská, M.; Vyšvařil, M.; Žižlavský, T. Mortars with Crushed Lava Granulate for Repair of Damp Historical Buildings. Materials 2019, 12, 3557. https://doi.org/10.3390/ma12213557

AMA Style

Pavlík Z, Pokorný J, Pavlíková M, Zemanová L, Záleská M, Vyšvařil M, Žižlavský T. Mortars with Crushed Lava Granulate for Repair of Damp Historical Buildings. Materials. 2019; 12(21):3557. https://doi.org/10.3390/ma12213557

Chicago/Turabian Style

Pavlík, Zbyšek, Jaroslav Pokorný, Milena Pavlíková, Lucie Zemanová, Martina Záleská, Martina Vyšvařil, and Tomáš Žižlavský. 2019. "Mortars with Crushed Lava Granulate for Repair of Damp Historical Buildings" Materials 12, no. 21: 3557. https://doi.org/10.3390/ma12213557

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