Bonding strength characteristics of FA-based geopolymer paste as a repair material when applied on OPC substrate
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2022
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my.unimap-747492022-03-22T02:17:10Z Bonding strength characteristics of FA-based geopolymer paste as a repair material when applied on OPC substrate Mohd Mustafa Al Bakri, Abdullah Warid Wazien, Ahmad Zailani Bouaissi, Aissa Mohd Mustafa Al Bakri, Abdullah Rafiza, Abd Razak Yoriya, Sorachon Mohd Arif Anuar, Mohd Salleh Mohd Remy Rozainy, M. A. Z. Hamzah, Fansuri mustafa_albakri@unimap.edu.my Center of Excellence Geopolymer and Green Technology (CEGeoGTech), School of Materials Engineering, Universiti Malaysia Perlis (UniMAP) Faculty of Civil Engineering, Universiti Teknologi MARA (UiTM) School of Marine Science and Engineering, University of Plymouth National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA) School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia (USM) Department of Chemistry, Institut Teknologi Sepuluh Nopember (ITS) Fly ash Geopolymer repair material Compressive strength Bonding strength Bonding zone Link to the publisher's homepage at https://www.mdpi.com/ This investigative study aims to study the mechanical and morphological properties of fly ash (FA)-based geopolymer paste as a repair material when applied on ordinary Portland cement (OPC) overlay concrete. The first part of this study investigates the optimal mix design of FA-based geopolymer paste with various NaOH concentrations of 8, 10, 12, and 14 M, which were used later as a repair material. The second part studies the bonding strength using a slant shear test between the geopolymer repair material and OPC substrate concrete. The results showed that a shorter setting time corresponds to the higher NaOH molarity, within the range of 53 and 30 min at 8 and 14 M, respectively. The compressive strength of FA-based geopolymer paste was found to reach 92.5 MPa at 60 days. Also, from the slant shear test results, prism specimens with 125 mm length and 50 mm wide have a large bond strength of 11 MPa at 12 M. The scanning electron microscopy/energy-dispersive X-ray (SEM/EDX) analysis showed that the OPC substrate has a significant effect on slant shear bond strength, where the presence of free cations of Ca2+ on the OPC substrate surface contributed to the formation of calcium alumina-silicate hydrate gel (C-A-S-H) by building various cross-links of Ca-O-Si. 2022 2022-03-22T02:17:10Z 2022-03-22T02:17:10Z 2020-05 Article Applied Science, vol.10(9), 2020, pages 3321 2076-3417 http://dspace.unimap.edu.my:80/xmlui/handle/123456789/74749 https://doi.org/10.3390/app10093321 en MDPI AG |
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| language |
English |
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Fly ash Geopolymer repair material Compressive strength Bonding strength Bonding zone |
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Fly ash Geopolymer repair material Compressive strength Bonding strength Bonding zone Mohd Mustafa Al Bakri, Abdullah Warid Wazien, Ahmad Zailani Bouaissi, Aissa Mohd Mustafa Al Bakri, Abdullah Rafiza, Abd Razak Yoriya, Sorachon Mohd Arif Anuar, Mohd Salleh Mohd Remy Rozainy, M. A. Z. Hamzah, Fansuri Bonding strength characteristics of FA-based geopolymer paste as a repair material when applied on OPC substrate |
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Link to the publisher's homepage at https://www.mdpi.com/ |
| author2 |
mustafa_albakri@unimap.edu.my |
| author_facet |
mustafa_albakri@unimap.edu.my Mohd Mustafa Al Bakri, Abdullah Warid Wazien, Ahmad Zailani Bouaissi, Aissa Mohd Mustafa Al Bakri, Abdullah Rafiza, Abd Razak Yoriya, Sorachon Mohd Arif Anuar, Mohd Salleh Mohd Remy Rozainy, M. A. Z. Hamzah, Fansuri |
| format |
Article |
| author |
Mohd Mustafa Al Bakri, Abdullah Warid Wazien, Ahmad Zailani Bouaissi, Aissa Mohd Mustafa Al Bakri, Abdullah Rafiza, Abd Razak Yoriya, Sorachon Mohd Arif Anuar, Mohd Salleh Mohd Remy Rozainy, M. A. Z. Hamzah, Fansuri |
| author_sort |
Mohd Mustafa Al Bakri, Abdullah |
| title |
Bonding strength characteristics of FA-based geopolymer paste as a repair material when applied on OPC substrate |
| title_short |
Bonding strength characteristics of FA-based geopolymer paste as a repair material when applied on OPC substrate |
| title_full |
Bonding strength characteristics of FA-based geopolymer paste as a repair material when applied on OPC substrate |
| title_fullStr |
Bonding strength characteristics of FA-based geopolymer paste as a repair material when applied on OPC substrate |
| title_full_unstemmed |
Bonding strength characteristics of FA-based geopolymer paste as a repair material when applied on OPC substrate |
| title_sort |
bonding strength characteristics of fa-based geopolymer paste as a repair material when applied on opc substrate |
| publisher |
MDPI AG |
| publishDate |
2022 |
| url |
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/74749 |
| _version_ |
1729704801272332288 |
| score |
13.214268 |