• Journal of the Korean Wood Science and Technology
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• v.28 no.3
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• pp.14-24
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• 2000

In present research, the plywoods made of radiata pine or Japanese larch, the potential softwood species in mass supply, were discussed to examine their feasibility as the structural and concrete form panels through the basic properties test. First, plywood qualities and its nail performance were tested. The performance test for concrete form or structural panel by concentrated and uniformly distributed load were conducted to investigate the possibility as structural material for light frame and concrete constructions. Test results of basic quality such as specific gravity, cupping, bowing, and twisting appeared to satisfy the criteria for structural use. Also, nail performance test results, for roof and wall sheathing panels, nail lateral resistance, nail withdrawal resistance, and nail push head resistance proved to meet the required standard for structural use. The test results on performance as structural panel by concentrated and uniformly distributed load and as concrete form panel showed that these two species could be used for structural sheathing, subfloor, and concrete form panels.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.07a
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• pp.213-215
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• 2015

플로팅 건축용 콘크리트 구조물은 부식환경에 노출되어 매립된 철근의 부식에 따른 구조물의 내구성능에 문제가 발생하게 된다. 철근 부식에 의한 내구성이 저하되는 문제의 여러 효과적인 해결방법 중 하나로 철근 코팅 기법이 있으며, 철근의 용융아연도금시 표면에 용융아연층이 형성되어 철근을 보호하는 장점이 있으나 콘크리트와의 부착 성능에 대한 연구는 미비한 실정이다. 따라서, 본 연구에서는 플로팅 건축용 콘크리트 구조물의 철근 겹이음에 따른 거동 특성연구를 수행하였다.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.329-330
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• 2010

For the computerization of structural lightweight concrete mix design, mix design theories of ACI211.2-98(Standard Practice for Selecting Proportions for Structural Lightweight Concrete) are investigated and the mix design process is mathematized by Table Curve 2D and 3D software of Jandel company.

• Journal of the Korean Society of Hazard Mitigation
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• v.5 no.1 s.16
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• pp.77-84
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• 2005

Amount of demolished concretes is highly produced as dismantlement of structures to increased owing to usage alteration and deteriorated of concrete structures, but most of them have been used as material for simple reclamation. Therefore, if demolished concrete could be recycled as aggregate for concrete. it will contribute to solve the exhaustion of nature aggregate, in terms of saving resources and protecting environment, especially being want of resources in Korea. In this study it was investigated into experimental results that were carried out demolished concrete recycled aggregate gained from dismantled real structures and source concrete recycled aggregate produced according to respectively 5 steps of replacement ratio for recycling as pavement concrete aggregate.

• Magazine of the Korea Concrete Institute
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• v.10 no.4
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• pp.5-15
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• 1998

• Magazine of the Korea Concrete Institute
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• v.10 no.4
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• pp.16-26
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• 1998

• Magazine of the Korea Concrete Institute
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• v.16 no.1 s.78
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• pp.96-103
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• 2004

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.377-380
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• 2008

Structural lightweight concrete will reduced total loads of supporting sections and foundations in archtectural and civil structures. So, the lightweight concrete can use widely for various purpose in the archtectural and civil structures. However, the performance of lightweight concrete is essentially dependent of properties of used lightweight aggregates. So, in this paper were examined the fresh and hardened properties of lightweight concrete that are used 3types of the differences properties of lightweight aggregates from lower water-ratio to higher water-ratio of concrete mixing regions. Lightweight concrete was somewhat exhibit larger slump loss than ordinary concrete. Also, the development of compressive strength was lower than ordinary concrete, however it was not showed a marked difference. According to types of lightweight aggregates, the case of synthetic lightweight aggregate are highest performance in fresh and hardened concrete, but it is should be to evaluate the structural performance testing as anchoring and bond strength with reinforcing steel bars.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.04a
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• pp.97-100
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• 2008

In order to recycled wast concrete which is occurred from demolition of the old building, it is effective that the recycled aggregate used as structural concrete aggregate. For used recycled aggregate with structural concrete, the structural capacity must be confirmed. This Study investigated bond capacity which follows in difference of absorption of the aggregate between rebar and concrete. Test results show that there are not a difference of bond strength and slip behavior according to absorption ratio of natural and recycled coarse aggregate.

• Proceedings of the Korea Concrete Institute Conference
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• 2009.05a
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• pp.355-356
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• 2009

The recycled aggregates include a lot of aggregates for concrete. Using the heavy medium separation method that is one of the specific gravity separation methods, about 45% of the waste concrete could be converted to the recycled aggregates.