• Journal of the Korean Society for Nondestructive Testing
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• v.20 no.4
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• pp.290-295
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• 2000

The joint treatment of concrete is one of the technical problems in top down construction method. Joints created with the top down construction result in serious weakness from the aspects of both structural and water-barrier function. Ultrasonic method was used for the inspection of top down construction joints of a various column in SRC structure in this study. The advantages and limitations of this method for non-destructive inspection in top down construction joints are investigated. As a result, it has been verified that the semi-direct measurement method is more effective than the other methods for detecting the voids of construction joints using ultrasonic method.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.6A
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• pp.525-534
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• 2010

A road curbstone is a structure installed at the boundary of the sidewalk and the street with the objectives of road drainage, drawing attention and such. The current general construction method of curbstones places foundation concrete for the curbstones first, waits until the concrete reaches the strength to support the curbstones, places the curbstones on top, and then places the gutter and rear filling concrete. Such method has the issues of poor compaction and weakened bond strength of concrete due to split placing of concrete, and causes the curbstones to easily separate due to vehicle impact or earth pressure, in turn creating maintenance costs and spoiling the aesthetics. To improve such conventional construction methods, an all-in-one method was developed using formwork rail and jig where both the curbstones and gutter can be worked at the same time, and to evaluate the structural performance, static tests of lateral loading test, pullout test, and bending test were executed, and dynamic tests such as pendulum test and actual vehicle impact test were executed. In all tests, the all-in-one construction method using formwork rail and jig was shown to be superior to the conventional construction method by the increase of construction quality and bond strength of concrete.

• Geotechnical Engineering
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• v.23 no.1
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• pp.36-40
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• 2007

• Proceedings of the Korea Concrete Institute Conference
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• 1999.10a
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• pp.829-836
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• 1999

• Magazine of the Korea Concrete Institute
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• v.11 no.2
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• pp.28-32
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• 1999

• Magazine of the Korea Concrete Institute
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• v.13 no.5
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• pp.69-76
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• 2001

• 건축구조
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• v.9 no.2
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• pp.38-39
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• 2002

• 건축구조
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• v.12 no.5
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• pp.28-32
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• 2005

• Geotechnical Engineering
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• v.19 no.8
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• pp.40-44
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• 2003

• Korean Architects
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• no.4 s.157
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• pp.101-102
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• 1982