• Journal of Drive and Control
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• v.21 no.1
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• pp.77-80
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• 2024

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.408-411
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• 2007

Many studies are currently in progress concerning about recycling due to the environmental problems and the drain of the resources. Nowaday, the problems on wastes are increasing thus studies on the construction waste are necessary which is the greater part of domestic wastes. And much more studies on the waste concrete which takes a large part of construction wastes are in progress but the studies on how to handle the waste concrete economically are unsatisfactory. This study suggests the analyzation of the economical way of handling the waste concrete by processes depending on the cost which needed in the each process, and can be the fundamental data of the future construction waste recycling system.

• Resources Recycling
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• v.14 no.4 s.66
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• pp.10-16
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• 2005

In order to recycle the waste concrete from which the reproductive aggregate should be produced in-situ, the applicability of crushers and recycled aggregates, and the compliance with the specification have been evaluated comprehensively. As a result of them, the properties of recycled aggregate particles were inferior to the natural one because of the adherent mortars on the recycled one, and the mobile impact crusher and the eccentric-mounted cone and jaw were superior to the others for the graded aggregates. In the case of anti-frost layer, the recycled one was easily controlled since the dry densities, contrary to natural one, were not largely changed with the moisture contents. It was found that the lean concrete base course is not influenced by absorption as cement dust grows larger, and the 7-day compressive strengths of lean concrete were higher than 10 MPa regardless of the crushing type.

• Journal of the Korean Recycled Construction Resources Institute
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• v.1 no.1
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• pp.98-107
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• 2005

In other to recycle the waste concrete produced in stiu on the construction and management in highway, the recycled aggregates were experimentally examined in a practical application for anti-freezing layer and lean concrete base course. From the results, the mobile impact crusher and the eccentric-mounted cone and jaw were superior to the others for the graded aggregates. In the case of anti-freezing layer, the recycled one was easily controlled since the dry densities, contrary to natural one, were not largely changed with the moisture contents. It was found that the 7days compressive strengths of lean concrete were above the 10MPa regardless of the crushing types. From the result of testing the bearing capacity of anti-freezing layer, it was found that when the recycled aggregates mixed with natural sand would be within the required gradations, the layer meets the requirements of limitation and the percentage to passing 2-20mm sieve increased by 5~13% because the flimsy mortars on aggregate were re-crushed by vibrated-roller compactor. Although the compressive strength of lean concrete was 71~85% of the natural coarse aggregate, the recycled aggregates are applicable to the lean concrete because they largely exceeded the required strength, 5.8MPa.