Self-Compacting Concrete With C&DW: Microstructure And Long-Term

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Title: Self-Compacting Concrete With C&DW: Microstructure And Long-Term

Author(s): Stefania Manzi; Claudio Mazzotti and Maria Chiara Bignozzi

Publication: Special Publication

Volume: 305

Issue:

Appears on pages(s): 17.1-17.8

Keywords: construction and demolition waste; long-term behavior; mechanical properties; microstructure; porosity; self-consolidating concrete; sustainability

Date: 9/1/2015

Abstract:
Mix-design of self-consolidating concrete (SCC) with construction and demolition concrete waste (C&DW) as recycled aggregates is investigated. The novelty of this paper consists in the possibility of using both fine and coarse high-grade C&DW for the preparation of new SCC. The effects of recycled aggregates on porosity measurements and mechanical investigations combined with time-dependent properties are investigated. A reference SCC mix, with natural aggregates and the same water/powder ratio as SCC with recycled aggregates, is reported for comparison. Results are correlated in an integrated approach to study the feasibility of structural SCC with medium-high mechanical strength. Finally, this work attempts to strengthen the concept of sustainability in civil constructions.