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Title |
Use of Geopolymer Mortar as an Insulation Material
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Authors |
오창준(Chang-Jun Oh) ; 이정배(Jeong-Bae Lee) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.1.021 |
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Keywords |
지오폴리머; 단열재; 단열모르타르; 경량 골재 geopolymer; insulator; insulating mortar; lightweight aggregate |
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Abstract |
As interest in energy conservation and carbon reduction continues to grow, the need to explore energy-saving methods in building structures has become increasingly important. Among the various types of energy used in construction, a significant amount can be saved through insulation, underscoring the need for effective strategies in this field. This study investigates the feasibility of producing insulation materials by incorporating lightweight aggregates into a geopolymer, which is made using fly ash and ground granulated blast-furnace slag (GGBS), both of which exhibit lower thermal conductivity than cement. The research examines the thermal conductivity, length change rate, bond strength, and physical properties of the insulation material based on the molar concentration of the alkaline activator, the amount of activator added, and the proportion of lightweight aggregates. The results indicate that geopolymer-based insulation material, when mixed with lightweight aggregates, meets the performance criteria set in the Korean Standard (KS F 4040). Furthermore, the material satisfies the required performance criteria for thermal conductivity, bond strength, and length change rate specified for three types of thermal insulation mortars. The study also confirms the material’s suitable fluidity and compressive strength, demonstrating its potential as an effective insulation material.
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