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      • 옥상 녹화용 방수층 일반부의 내근성 평가를 위한 시험장치 개발

        표순주(Pyo Soon-Ju) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)

        A penetrating needle into a membrane was first developed on the basis of the observation of bamboo grass tips and lawn grass tips. Then, the penetrating load of the needle was measured for various waterproofing membranes at the needle displacement speed of 1㎜/min. These two types of grass were also planted in the containers, inside of which the waterproofing membranes were applied. After the rearing of 1 year. the membranes were inspected. The two results of each membrane type were compared. We were interested in the maximum strength and the strength at l㎜ displacement. These values are considered to be useful as indices for the estimation of the waterproofing membranes' root resistance.

      • KCI등재

        옥상 녹화용 방수층 일반부와 조인트부의 내근성 평가를 위한 시험장치 개발

        표순주(Pyo Soon-Ju) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.1

        A penetrating needle into a membrane was first developed on the basis and lap joints of the observation of bamboo grass tips and lawn grass tips. Then, the penetrating load of the needle was measured for various waterproofing membranes at the needle displacement speed of 1㎜/min. These two types of grass were also planted in the containers, inside of which the waterproofing membranes were applied. After the rearing of 1 year, the membranes were inspected. The two results of each membrane type were compared. We were interested in the maximum strength and the strength at 1㎜ displacement. These values are considered to be useful as indices for the estimation of the waterproofing membranes' root resistance. The resistance of the membranes at lap joints having non adhesives and different bonding strengths was determined as a measure of its vulnerability to root penetration. Results from field tests indicated that bamboo grass tips (rhizome) easily penetrated lap joints of non?adhesive membranes. Hence it was evident that waterproofing membrane systems having nonadhesive overlapped joints do not provide adequate resistance to root penetration of the membrane. The resistance to root penetration is dependent on the adhesive strength of the lap joint. The specimens with lap joints having lower bonding strengths were readily penetrated by the rhizome. From this knowledge, a test method was developed to assess the expected resistance of membrane lap joints to the penetration of a needle. The needle, in essence, emulated the shape of bamboo grass tips. Thereafter, the test result from field test on the resistance of membrane to the penetration of roots were compared to those obtained from tests using a penetrating needle. Results from the penetrating needle test indicated that the resistance measured at a 10 ㎜ displacement of needle was effective means of evaluating the resistance of membrane lap joints to the penetration of roots.

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