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Comprehensive study on mechanical properties of lime-based pastes with additions of metakaolin and brick dust

SYSNO ASEP	0429333
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Comprehensive study on mechanical properties of lime-based pastes with additions of metakaolin and brick dust
Author(s)	Nežerka, V. (CZ) Slížková, Zuzana (UTAM-F)_{RID, SAI, ORCID} Tesárek, P. (CZ) Plachý, T. (CZ) Frankeová, Dita (UTAM-F)_{RID, SAI, ORCID} Petráňová, Veronika (UTAM-F)_{RID, SAI}
Number of authors	6
Source Title	Cement and Concrete Research. - : Elsevier - ISSN 0008-8846 Roč. 64, October (2014), s. 17-29
Number of pages	13 s.
Publication form	Print - P
Language	eng - English
Country	GB - United Kingdom
Keywords	microstructure ; mechanical properties ; CaO ; metakaolin ; brick dust
Subject RIV	AL - Art, Architecture, Cultural Heritage
R&D Projects	DF11P01OVV008 GA MK - Ministry of Culture (MK)
UT WOS	000340304500003
EID SCOPUS	84903988153
DOI	10.1016/j.cemconres.2014.06.006
Annotation	In order to understand the behavior of lime-based mortars, and to identify the influence of pozzolans, it is important to investigate the microstructure and properties of lime-based pastes without any aggregates. In our work, nine different sets of pastes with additions of metakaolin and brick dust were studied. The chemical composition and microstructure were investigated by means of TGA, SEM–BSE microscopy and EDX analysis. The mechanical strength and fracture properties were determined from destructive tests, while the evolution of the Young's modulus was monitored using the resonance method. The study revealed that metakaolin exhibits much stronger pozzolanic activity than brick dust, and that the mechanical properties of pastes are not necessarily enhanced by the addition of pozzolans. However, the shrinkage reduction should result in the elimination of cracking around aggregates in mortars. These information contribute to better understanding of lime-based mortars and are essential for their proper modeling and design.
Workplace	Institute of Theoretical and Applied Mechanics
Contact	Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285
Year of Publishing	2015
Electronic address	https://doi.org/10.1016/j.cemconres.2014.06.006

Number of the records: 1