Engineering of green cementitious composites modified with siliceous fly ash: Understanding the importance of curing conditions

Chajec, Adrian; Chowaniec, Agnieszka; Królicka, Aleksandra; Sadowski, Łukasz; Żak, Andrzej; Piechowka-Mielnik, Magdalena; Šavija, B.

doi:10.1016/j.conbuildmat.2021.125209

Engineering of green cementitious composites modified with siliceous fly ash

Title

Engineering of green cementitious composites modified with siliceous fly ash: Understanding the importance of curing conditions

Author

Chajec, Adrian (Wrocław University of Technology)
Chowaniec, Agnieszka (Wrocław University of Technology)
Królicka, Aleksandra (Wrocław University of Technology)
Sadowski, Łukasz (Wrocław University of Technology)
Żak, Andrzej (Wrocław University of Technology)
Piechowka-Mielnik, Magdalena (Wrocław University of Technology)
Šavija, B. (TU Delft Materials and Environment)

Date

2021

Abstract

Siliceous fly ash can be applied as a cement replacement material for mortars used in cement-based floor overlays. At present, there is no knowledge of the appropriate curing conditions that need to be applied on concrete floors. Moreover, previous research related to curing conditions has left research gaps related to the conditions in which such floors are cured. This study focuses on understanding the importance of the curing conditions that are typical for concrete overlays on the physical, chemical, mechanical, and microstructural properties of siliceous fly ash-modified mortars. The results indicate that curing conditions have a significant impact on these properties (particularly long-term effects). Differences were observed between siliceous fly ash-modified mortars cured in different conditions. In this research, we investigated the volume porosity, water absorption, microstructure, hydration process, pore segmentation, and strength of composites that have had cement partially replaced with the addition of fly ash. It should be noted that the use of siliceous fly ash in properly cured mortars that are applied in floor overlays could lead to a better use of green cementitious composites.

Subject

Cementitious materials
Curing conditions
Mortars
Siliceous fly ash

To reference this document use:

http://resolver.tudelft.nl/uuid:d08ddcd0-04b4-46f8-aa4f-4e9d56095604

DOI

https://doi.org/10.1016/j.conbuildmat.2021.125209

ISSN

0950-0618

Source

Construction and Building Materials, 313

Part of collection

Institutional Repository