Abstract
Construction and Demolition Waste (CDW) has been being accounted for a large amount of waste in urban areas of Vietnam due to rapid urbanization and economic growth. In this study, waste masonry collected from a CDW landfill site in Hanoi was crushed and graded in the laboratory to prepare graded recycled aggregate (GRA) for unbound road subbase. Compaction and California Bearing Ratio (CBR) tests were carried out for the GRA samples with different mixing proportions of concrete and clay brick. Experimental results showed that the measured CBR values are dependent on the mixing proportions of concrete and clay brick. Except for 100% recycled clay brick aggregates, the measured CBR met both technical requirements in Vietnam and Japan. Among of tested GRA samples in this study, the combination of 50% recycled concrete aggregate and 50% recycled clay brick aggregate became the most preferable material for the purpose of road subbase construction.
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Acknowledgments
This research was supported by JST-JICA Science and Technology Research Partnership for Sustainable Development (SATREPS) project (No. JPMJSA1701).
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Viet, C.T., Van, T.N., Hoang, G.N., Ken, K. (2020). Utilization of Construction and Demolition Waste (CDW) for Unbound Road Subbase in Hanoi, Vietnam. In: Duc Long, P., Dung, N. (eds) Geotechnics for Sustainable Infrastructure Development. Lecture Notes in Civil Engineering, vol 62. Springer, Singapore. https://doi.org/10.1007/978-981-15-2184-3_95
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DOI: https://doi.org/10.1007/978-981-15-2184-3_95
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