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Title |
Bond Strength Evaluation of Quasi-Non-combustible Composite Insulation Systems for Building Facades According to Bonding Methods
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Authors |
하수경(Soo-Kyoung Ha) ; 최기선(Ki-Sun Choi) |
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DOI |
https://doi.org/10.11112/jksmi.2025.29.3.76 |
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Keywords |
외단열 복합시스템; 부착강도; ETAG 004; 준불연 단열재; 직접인발실험 External thermal insulation composite systems; Bond strength; ETAG 004; Quasi-Non-combustible Insulation; Pull-off test |
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Abstract |
This study evaluated the bond strength performance of a quasi non-combustible external thermal insulation composite system (ETICS).
Pull-off tests were conducted with reference to the ETAG 004 standard on sandwich-type insulation panels composed of calcium carbonate-based external finishing boards (RCB) and quasi non-combustible EPS and PIR insulation cores. The specimens were fabricated using two installation methods: post-installed bonding with adhesive and site-cast concrete. The post-installed specimens exhibited a wide range of failure resistances from 0.037 MPa to 0.140 MPa, with most failures occurring as cohesive rupture within the EPS and PIR cores. In contrast, the site-cast method demonstrated more stable bond performance with failure resistances ranging from 0.124 MPa to 0.140 MPa. The calculated minimal admissible bonded surface areas were 35.7% and 41.7% for the post-installed EPS and PIR systems, respectively, and 24.2% for the site-cast EPS system. These findings indicate that bond strength and installation reliability can vary significantly depending on the type of insulation and installation method, underscoring the importance of selecting an appropriate construction technique to ensure structural safety.
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