Publication detail

Use of Chalcedonite Powder as a Supplementary Material in Lime Mortars

VYŠVAŘIL, M. KREBS, M. BAYER, P.

Original Title

Use of Chalcedonite Powder as a Supplementary Material in Lime Mortars

Type

conference paper

Language

English

Original Abstract

This paper presents a study on partial replacement of lime binder with chalcedonite powder with the purpose of exploring a new application of this waste dust as lime mortar additive. Chalcedonite powder is formed as a by-product of the treatment of mined stone containing chalcedony as the main mineral. Standard air lime mortars were made by incorporating from 0% to 40% of micronized chalcedonite powder in replacement to lime and their mechanical performances, microstructure, and durability were determined. Despite the fully crystalline nature, the chalcedonite powder showed an unusually high pozzolanic activity predicting an improvement in the mechanical properties and durability of lime mortars. As the replacement level in lime mortars increased, the amount of mixing water needed for the same mortar consistency decreased, and the performance properties of the mortars improved. The increase in strengths of mortars was manifested in the long term of 180 days. The progress in mortars carbonation, as well as the pozzolanic reaction of chalcedonite powder, led to the formation of denser, less water absorptive, and more frost resistant structure in air lime mortars.

Keywords

Lime mortar; Pozzolanic additive; Chalcedony; Waste dust; Frost resistance

Authors

VYŠVAŘIL, M.; KREBS, M.; BAYER, P.

Released

13. 9. 2022

Publisher

UNIVERSITY OF CANTABRIA

Location

SANTANDER (SPAIN)

ISBN

978-84-09-42253-1

Book

Book of Articles of 9th Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management, REHABEND 2022

Pages from

1314

Pages to

1320

Pages count

7

BibTex

@inproceedings{BUT179302,
  author="Martin {Vyšvařil} and Martin {Krebs} and Patrik {Bayer}",
  title="Use of Chalcedonite Powder as a Supplementary Material in Lime Mortars",
  booktitle="Book of Articles of 9th Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management, REHABEND 2022",
  year="2022",
  pages="1314--1320",
  publisher="UNIVERSITY OF CANTABRIA",
  address="SANTANDER (SPAIN)",
  isbn="978-84-09-42253-1"
}