국내 지중흰개미의 목조건축물 유입 차단을 위한 모래의 적정 입도 연구
A Study on the Particle Size of Sand to Prevent Penetration of Subterranean Termite (Reticulitermes speratus kyushuensis) in Wooden Buildings
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초록
흰개미는 목조건축문화재의 주요 손상 원인 중 하나이며, 방제를 위해 살충제가 주로 사용되어 왔다. 흰개미 피해가 심한 국가들은 화학적 방제법의 대안으로 흰개미가 통과하지 못하는 망, 입자 등을 이용한 물리적 방어벽이 사용되고 있다. 본 연구에서는 물리적 방어벽의 적용을 위해 국내 전역에 서식하는 R. speratus kyushuensis의 유입을 차단하는 모래의 적정 입도 범위를 규명하고자 하였다. 0.85∼4.00 mm의 입도별 모래로 흰개미 유입 차단성을 평가한 결과 1.00∼2.80 mm 입도 조건에서 흰개미의 유입을 효과적으로 차단하였다. 이보다 작은 입도 조건 에서는 흰개미들이 모래 입자를 옮겨서 선형에 가까운 흰개미 길(mud tube)을 구축하여 모래층 을 관통하였으며, 이보다 큰 입도 조건에서는 흰개미들이 모래 사이의 공극을 지나다니는 방법 으로 모래층을 관통하는 양상이 확인되었다.
Abstract
Termites cause massive damage to wooden architectural heritage structures. Chemical treatments have been commonly used to control them. In foreign countries, physical barriers made of sheet and particles impenetrable to termite are being used as an alternative to the chemical method. To study the efficacy of physical barriers, we investigated the appropriate sand particle size that can prevent the penetration of R. speratus kyushuensis. Upon evaluating the barrier properties of sand with particle sizes ranging from 0.85 to 4.00 mm, the penetration of termites was found to be effectively blocked at a particle size range of 1.00 to 2.80 mm. At smaller particle sizes, termites managed to move the sand particles and build an almost linear mud tube to penetrate the sand layer. At larger particle sizes, the termites could penetrate the sand layer by passing through the sand gaps.
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