Abstract

Pozzolanic behaviour of fly ash was studied in mortars and pastes from lime-fly ash mixtures. Compressive strength increase of the mortar specimens that were cured in humid environment was a direct manifestation of a pozzolanic reaction of the fly ash with lime. Mineral composition of the reaction products was studied by X-ray diffraction analysis. Morphology of the samples was observed using SEM equipped with EDS detector. Analysis of a paste with the lime to fly ash ratio of 1:1 revealed that virtually all Ca(OH)2 in the paste was consumed within 5 years. The crystalline products of the pozzolanic reaction included calcium hemicarboaluminate hydrate and monocarboaluminate hydrate and some ettringite.

Details

Title
Cementitious and pozzolanic behaviour of fly ash
Author
Pavlik, V 1 

 Department of Material Engineering, Faculty of Civil Engineering, Slovak University of Technology in Bratislava, Radlinského 11, 810 05, Bratislava, Slovak Republic 
Publication year
2018
Publication date
Jul 2018
Publisher
IOP Publishing
ISSN
17578981
e-ISSN
1757899X
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2556997908
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.