Publication detail

Lightweight pumice mortars for repair of historic buildings –Assessment of physical parameters, engineering properties and durability

PAVLÍK, Z. VYŠVAŘIL, M. PAVLÍKOVÁ, M. BAYER, P. PIVÁK, A. ROVNANÍKOVÁ, P. ZÁLESKÁ, M.

Original Title

Lightweight pumice mortars for repair of historic buildings –Assessment of physical parameters, engineering properties and durability

Type

journal article in Web of Science

Language

English

Original Abstract

The subject of the presented research was an experimental analysis of physical, engineering and durability parameters of lightweight mortars intended for the repair of historical buildings. Compatibility criteria, the requirements of technical standards and guidelines, and last but not least, previously published research results dealing with the development of mortars for repair delicate historic structures were taken into account in the design of mortar composition. Crushed pumice of a similar grain size was used to lighten the reference lime-based mortar and natural hydraulic lime mortar with quartz filler. Replacement of quartz sand with pumice was 25, 50, 75 and 100% by volume. The use of pumice allowed the fundamental physical, mechanical, hygric, thermal and durability parameters of the lightweight mortars to be such that they met the standard requirements for repair mortars and the heritage conservation requirements for compatibility with the original materials of historic masonry. The main finding was the fact that by replacing sand with pumice, a significant increase in the porosity of the mortars was achieved, while maintaining sufficient mechanical strength due to the pozzolanic reaction of the pumice. Mortars based on natural hydraulic lime have become more resistant to frost and salt crystallization. The advantage of the developed mortars was their low thermal conductivity and high water vapor permeability, which made them suitable for use on damp masonry, which is a substantial scientific contribution of the manuscript.

Keywords

Compatibility; Experimental characterization; Freeze–thaw resistance; NaCl and Na2SO4 binding isotherms; Pumice; Repair mortars; Sand substitution

Authors

PAVLÍK, Z.; VYŠVAŘIL, M.; PAVLÍKOVÁ, M.; BAYER, P.; PIVÁK, A.; ROVNANÍKOVÁ, P.; ZÁLESKÁ, M.

Released

10. 11. 2023

Publisher

Elsevier

ISBN

0950-0618

Periodical

Construction and building materials

Number

133275

State

United Kingdom of Great Britain and Northern Ireland

Pages count

20

URL

https://www.sciencedirect.com/science/article/pii/S0950061823029926

BibTex

@article{BUT184695,
  author="Zbyšek {Pavlík} and Martin {Vyšvařil} and Milena {Pavlíková} and Patrik {Bayer} and Adam {Pivák} and Pavla {Rovnaníková} and Martina {Záleská}",
  title="Lightweight pumice mortars for repair of historic buildings –Assessment of physical parameters, engineering properties and durability",
  journal="Construction and building materials",
  year="2023",
  number="133275",
  pages="20",
  doi="10.1016/j.conbuildmat.2023.133275",
  issn="0950-0618",
  url="https://www.sciencedirect.com/science/article/pii/S0950061823029926"
}