Abstract:
PURPOSE: A connection structure between a cast-in-place concrete pile and a column member using a post-place anchor member and a construction method thereof are provided to rapidly and securely connect a column member and a cast-in-place pile. CONSTITUTION: A connection structure between a cast-in-place concrete pile and a column member using a post-place anchor member is composed as follows. A pipe member(10) is integrally installed on the top of a cast-in-place concrete pile(30). A precast column(20) of a pier(1) is inserted into the pipe member and is couple to the pipe member.
Abstract:
PURPOSE: An inorganic material coating composition is provided to ensure a reduction effect of a volatile organic compound, humidity control effect, deodorization, antibiotic property, and dew condensation prevention. CONSTITUTION: An inorganic material coating composition comprises natural jade, elvan, zeolite, diatomite, titanium dioxide, nanosilver particle and silicate-based inorganic liquid bonding agent. The zeolite is a mixture of zeolite 4A type and X-type in a weight ratio of 2:1 - 1:2. The content of zeolite is 1-10 weight%, the content of natural jade is 25-45 weight%, and the content of elvan is 10-25 weight% based on the total weight of composition.
Abstract:
본 발명은 삽입공이 형성되어 그 내부에 긴장재가 배치되고, 상·하단에 전단키가 형성되어 있는 프리캐스트 콘크리트 세그먼트를 간편하게 조립하고, 긴장재를 긴장시켜 프리캐스트 콘크리트 세그먼트를 연결함으로써 형성되는 조립식 프리캐스트 콘크리트 말뚝과 그 시공방법에 관한 것이다. 본 발명의 말뚝은 프리캐스트 콘크리트 부재를 이용한 말뚝으로서, 프리캐스트 콘크리트로 이루어진 세그먼트를 상·하로 조립하여 이루어지며; 상기 세그먼트에는, 상기 세그먼트가 조립되는 방향으로 상기 세그먼트를 관통하는 삽입공이 형성되어 있고; 상기 세그먼트의 삽입공이 이웃하여 적층되는 다른 세그먼트의 삽입공과 연통되도록 상기 세그먼트들이 상·하로 적층되며; 연통되는 상기 삽입공 내에는 긴장재가 연속 배치되어 있어, 상기 긴장재가 긴장됨으로써 상기 세그먼트들이 연결·조립되어 형성되는 것을 특징으로 한다. 프리캐스트 콘크리트 세그먼트, 프리캐스트 콘크리트 말뚝, 삽입공, 긴장재
Abstract:
A spalling failure prevention structure of a high-strength concrete member is provided to improve the quality of construction with the simple dry work, to apply the structure to the new or already constructed structure, and to enough secure the fire extinguishing time and the taking shelter hour by delaying that structure is broken down by preventing spalling failure in a fire. A spalling failure prevention structure of a high-strength concrete member is composed of a high-strength concrete member(10), an inorganic insulation layer(30) formed in the outer side of the high-strength concrete member, a fire resistant board(20) adhered to the outer surface of the inorganic insulation layer, a finish board(50) adhered to the outer surface of the inorganic insulation layer, and an air layer. The fire resistant board is formed at the thickness more than 15mm, and has the fire-resistance efficiency in which backside temperature is controlled at 200-450°C for three hours. The inorganic insulation layer is formed as the board type inorganic heat insulating material having glass surface or rock surface in order to have the thermal conductivity less than 00.1kcal /mh°C.
Abstract:
Provided is an eco-friendly urethane adhesive composition for producing sandwich panels, which contains no organic solvent so as to minimize emission of volatile organic compounds, and shows a high curing rate by adding imidazole based compound as curing accelerator to prevent interlayer separation of a sandwich panel after adhesion. The eco-friendly urethane adhesive composition comprises: a polyester polyol end-capped with a hydroxyl group as polycondensate of a polyol containing at least two OH groups and a polybasic acid containing at least two carboxylic acid groups; a curing agent formed of a diol as a chain extender for the polyol and a catalyst; a mixture of a diisocyanate with a diol as a base for an urethane adhesive; and an imidazole-based curing accelerator. The polyester polyol as an average molecular weight of 3,000-8,000, the diol and the catalyst are used in a weight ratio of 1:0.1-1, the polyester polyol and the mixture of the diol with the catalyst are used in a weight ratio of 10:1-5, the diisocyanate and the diol are used in a weight ratio of 1:0.05-5. The base materials for an urethane adhesive and the curing agent are used in a weight ratio of 1:0.5-1, and the curing accelerant is used in an amount of 0.01-1 wt% based on the total weight of the composition.