Physico-mechanical properties of geopolymer mortars for repair applications: Impact of binder to sand ratio

Zailani, Warid Wazien Ahmad and Apandi, Nazirah Mohd and Adesina, Adeyemi and Alengaram, Ubagaram Johnson and Faris, Meor Ahmad and Tahir, Muhammad Faheem Mohd (2024) Physico-mechanical properties of geopolymer mortars for repair applications: Impact of binder to sand ratio. Construction and Building Materials, 412. ISSN 0950-0618, DOI

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Deterioration of concrete structures made with ordinary portland cement (OPC) as a binder is inevitable, and this requires repair or rehabilitation using appropriate repair materials. A strong and highly adhesive repair material is very important in order to ascertain the safety of damaged concrete structures. The existing repair materials, especially those that utilized conventional OPC-based materials, appear to require a certain curing condition, which prior studies have revealed to result in a weak link between the repair material and the repaired structures. Hence, an alternative material which is geopolymer mortar was utilized in this study as a repair material, and the impact of geopolymer mortars with various binder-to-sand ratios was evaluated. The physical and mechanical properties of the geopolymer mortars were assessed in addition to their performance as a repair material in terms of their bonding characteristics to conventional concrete. Findings from this study revealed that geopolymer mortar with a binder-to-sand ratio of 1:2 exhibited the highest bonding strength. In addition, geopolymer mortars with a binder-to-sand ratio of 1:3 to 4:1 exhibited better bonding strength compared to when geopolymer paste was used. © 2024 Elsevier Ltd

Item Type: Article
Funders: Universiti Teknologi MARA [Grant no. 023/2023, 100-TNCPI/INT 16/6/2]
Uncontrolled Keywords: Adhesives; Binders; Concrete buildings; Concrete construction; Concretes; Deterioration; Diffusion bonding; Geopolymers; Inorganic polymers; Mortar; Repair; Sand; Bonding strength; Concrete; Damaged concretes; Geopolymer; Geopolymer mortars; Ordinary Portland cement; Physicomechanical properties; Repair applications; Repair materials; Sand ratios; Portland cement
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TP Chemical technology
Divisions: Faculty of Engineering > Department of Civil Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 06 May 2024 02:15
Last Modified: 06 May 2024 02:15

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