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

被引:9
作者
Zailani, Warid Wazien Ahmad [1 ]
Apandi, Nazirah Mohd [1 ]
Adesina, Adeyemi [2 ]
Alengaram, U. Johnson [3 ]
Faris, Meor Ahmad [4 ]
Tahir, Muhammad Faheem Mohd [5 ]
机构
[1] Univ Teknol MARA UiTM, Coll Engn, Sch Civil Engn, Shah Alam 40450, Selangor, Malaysia
[2] Univ Windsor, Dept Civil & Environm Engn, Windsor, ON N9B 3P4, Canada
[3] Univ Malaya, Fac Engn, Dept Civil Engn, Ctr Innovat Construct Technol, Kuala Lumpur 50603, Malaysia
[4] Univ Malaysia Perlis, Fac Mech Engn & Technol, Arau 02600, Malaysia
[5] Univ Malaysia Perlis, Fac Chem Engn Technol, Kangar 01000, Malaysia
关键词
Geopolymer; OPC; Concrete; Repair material; Bonding strength; BOND STRENGTH; CONCRETE SUBSTRATE; FLY; CEMENT; SLAG; COMPATIBILITY; WORKABILITY; INTERFACE; ACTIVATOR; PORTLAND;
D O I
10.1016/j.conbuildmat.2023.134721
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
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.
引用
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页数:14
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