• Journal of the Korea Institute of Building Construction
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• v.11 no.5
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• pp.515-522
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• 2011

As Construction and Demolition (C&D) debris increases every year, systems have been adopted to compel the use of recycled aggregate made from C&D debris, and the use of recycled aggregate in the construction field has increased. But environmental problems linked to the alkalinity of recycled aggregate have occurred, and a study on approaches to lower the alkalinity of recycled aggregate is needed. It was certified by this study that a large amount of recycled aggregate could be carbonated in the C&D debris midterm-treatment field. As a result, the density and the water absorption of recycled aggregate after carbonation reaction was improved, and pH of recycled aggregate was lowered from over 11 to 9.4. X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS), and Thermogravimetry/Differential Thermal Analysis (TG/DTA) methods also indicated the carbonation of recycled aggregate.

• 녹색21
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• s.10
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• pp.20-21
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• 2006

• 녹색21
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• s.10
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• pp.54-56
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• 2006

• 녹색21
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• s.10
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• pp.68-71
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• 2006

• 녹색21
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• s.10
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• pp.88-91
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• 2006

• 녹색21
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• s.10
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• pp.2-3
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• 2006

• 녹색21
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• s.10
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• pp.44-45
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• 2006

• 녹색21
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• s.10
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• pp.72-81
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• 2006

이 책자는 정부.지자체.공기업.민간이 추진했던 순환골재 재활용 적용사업에 대한 사례 중 우수사례를 용도별로 모은 것입니다. 향후 순환골재를 재활용함에 있어 소중한 참고자료가 될 수 있기를 바랍니다.

• Journal of the Korean Recycled Construction Resources Institute
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• v.6 no.3
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• pp.53-60
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• 2011

As Construction & Demolition(C&D) debris increase every year, a system has enforced for recycled aggregate made out of C&D debris, then recycled aggregate usage increased in construction field. But as environmental problem by alkalinity of recycled aggregate occurred, the study for lowering alkalinity of recycled aggregate is needed. In this study we made alkalinity reducing facility and installed in the C&D debris midterm-treat field. Then we certified effect of lowering alkalinity and quality of recycled aggregates before and after carbonation. As a result, the most effective carbonation condition is 30seconds in carbonation time, -50~100 kPa of reaction pressure with change of 3cycles. This condition made pH 9.33~9.8 of recycled aggregate possible. The quality of recycled aggregate after carbonation was better than before carbonation in terms of plasticity index, modified CBR, abrasion loss, sand equivalent, liquid limit, size distribution, density and water absorption.

• Magazine of RCR
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• v.2 no.1
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• pp.42-48
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• 2006