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화재 지연형 바탕조정재의 기초물성 평가에 관한 연구

Evaluation on the Properties of Fire Retardant Surface Preparation Mortars

  • 투고 : 2018.09.17
  • 심사 : 2018.11.05
  • 발행 : 2018.12.20

초록

외단열 마감 공법에서 사용되는 바탕조정재는 화재가 발생하는 경우 얇은 마감과 폴리머의 연소로 인해 표면부가 급속하게 붕괴되어 화재에 취약한 소재이다. 본 연구에서는 열적 성능이 우수한 팽창 흑연을 사용할 경우 바탕조정재의 성능을 개선할 수 있을 것으로 기대하였다. 실험결과, 팽창흑연을 사용한 바탕조정재는 부착강도 저하 및 물흡수계수 등의 감소가 발생하는 문제점이 있으나 플라이애시와 실리카흄을 사용하여 물리적 성능이 향상되는 것으로 나타났다. 팽창흑연을 사용한 바탕조정재는 복합 단열 시험체 표면의 페놀폼은 화염에 의한 표면 뚫림이 나타나지 않아 열원의 투과를 감소시킬 수 있을 것으로 나타났다.

In the case of fire, surface treatment agents used in external insulation finishing methods are substances that are vulnerable to fire due to thin finishes and the combustion of polymers. In this study, it was expected that the performance of surface preparation mortars could be improved by using expandable graphite with excellent thermal performance. Experimental results showed that the mechanical properties of surface preparation mortar were improved by using the fly ash and silica fume. Surface treatment materials using expanded graphite have a characteristic of expanding when a fire occurs. It has been shown that heat-swellable surface treatment materials can reduce the penetration of heat sources into the surface of synthetic insulation.

키워드

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Figure 1. Speciment of adhesive in tension strength test

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Figure 2. Insulation system & flame exposed test

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Figure 3. Adhesion in tension

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Figure 4. Adhesion in tension according to freeze thawing

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Figure 5. Water absorption coefficient

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Figure 6. Insulation surface of flame exposed

Table 1. Chemical composition of ordinary portland cement

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Table 2. Physical properties of ordinary portland cement

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Table 3. Composition of dolomite aggregate

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Table 4. Specification of acrylic resin

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Table 5. Composition of binder

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Table 6. Specification of expandable graphite

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Table 7. Physical properties of glass fiber mesh

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Table 8. Specification of fly ash and silica fume

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Table 9. Specification of insulation

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Table 10. Experiment process

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Table 11. Experimental factors and levels in this study

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Table 12. Temperature change of insulation system and expanded depth of surface preparation mortars after 15 minutes of flame exposure

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참고문헌

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