University of Oulu

P. Perumal, T. Paul, T. Luukkonen, J. Röning, P. Kinnunen and M. Illikainen, Performance of Fibre-Reinforced Slag-Based Alkali Activated Mortar in Acidic Environment, in: Current Topics and Trends on Durability of Building Materials and Components, Serrat et al. (Eds). URL https://www.scipedia.com/public/Perumal_et_al_2020a

Performance of fibre-reinforced slag-based alkali activated mortar in acidic environment

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Author: Perumal, Priyadharshini1; Paul, Tirthankar2; Luukkonen, Tero1;
Organizations: 1Inorganic Binders Group, Fibre and Particle Engineering Research Unit (FPERU), University of Oulu, Pentti Kaiteran katu 1, 90014 Oulu, Finland
2Biomimetics and Intelligent System Group, Information Technology and Electrical Engineering, University of Oulu, Pentti Kaiteran katu 1, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2020110589329
Language: English
Published: International Center for Numerical Methods in Engineering, 2020
Publish Date: 2020-11-05
Description:

Abstract

The main aim of the work is to study the effect of different fibres (steel, glass and basalt) on resistance of blast furnace slag-based alkali-activated mortar in acidic environment. The alkaliactivated slag mortars were exposed to 5% sulfuric and acetic acid solutions for 30 days. Mass change, compressive strength and microstructural changes were evaluated. In plain mortar, it was observed that 70% of the strength was retained in acetic acid environment whereas only 20% of residual strength remains in sulphuric acid environment. FTIR spectroscopy shows the degradation of the matrix, which implies the alkali-activated mortar was more vulnerable in sulphuric acid environment due to its aggressive nature compared to acetic acid. Decalcification and formation of calcium acetate also hinders the further progress of damage in acetic acid attack. Fibres helped in improving the performance of the mortar by holding the matrix together when the degradation occurred in acidic environment. Compared to plain mortar, incorporation of steel fibres exhibited a maximum strength retention of 19% in acetic acid and 7% in sulphuric acid, followed by glass and basalt fibres. SEM images clearly show the debonding of fibres and disintegration of matrix in acidic environment, which resulted in strength loss.

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ISBN Print: 978-84-121101-8-0
Pages: 1561 - 1568
DOI: 10.23967/dbmc.2020.109
OADOI: https://oadoi.org/10.23967/dbmc.2020.109
Host publication: Current Topics and Trends on Durability of Building Materials and Components : Proceedings of the XV edition of the International Conference on Durability of Building Materials and Components (DBMC 2020). Barcelona, Spain 20 -23 October 2020
Host publication editor: Serrat, Carles
Casas, Joan Ramon
Gilbert, Vicente
Conference: International Conference on Durability of Building Materials and Components
Type of Publication: A4 Article in conference proceedings
Field of Science: 212 Civil and construction engineering
Subjects:
Funding: This work was supported by the Finnish Funding Agency for Technology and Innovation (Tekes) (project GEOBIZ, grant number 1105/31/2016). Authors acknowledge Business Finland (grant # 1215/31/2015) and Academy of Finland (grant #292526, #319676 and #326291) for financial support.
Academy of Finland Grant Number: 292526
319676
326291
Detailed Information: 292526 (Academy of Finland Funding decision)
319676 (Academy of Finland Funding decision)
326291 (Academy of Finland Funding decision)
Copyright information: © The Authors 2020. Published under the CC BY-NC-SA license.
  https://creativecommons.org/licenses/by-nc-sa/4.0/