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DRYING SHRINKAGE IN CONCRETE USING RECYCLED AGGREGATE FROM CONSTRUCTION AND DEMOLITION WASTE
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Tóm tắt
In Vietnam, rapid urbanization and infrastructure development make a critical increase in construction and demolition waste (CDW), posing many environmental challenges. CDW also occupies a large area of landfills causing many problems for populous residence. A promising sustainable solution is recycling CDW into recycled aggregates in concrete production. However, the properties of recycled aggregates raise concerns about the long-term performance especially drying shrinkage. This study investigates the effect of recycled aggregates produced from CDW to the drying shrinkage in concrete.
Concrete mixtures with varying replacement ratios of recycled aggregates in concrete were designed and specimens were prepared. After 26 weeks, the results showed a clear correlation between the recycled aggregates replacement ratio and drying shrinkage. Mixtures with higher replacement ratio of recycled aggregates show a significantly increased drying shrinkage compared to normal concrete. The results of this research addressed the necessity for mix proportion design adjustments for recycled aggregate concrete to mitigate drying shrinkage and facilitate its reliable, high-volume application in Vietnam, which can promote a sustainable development for construction industry
Từ khóa
Drying shrinkage, recycled aggregate concrete, construction and demolition waste
Chi tiết bài viết
Tài liệu tham khảo
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