Title: Design and Performance of Low-Powder Self-Consolidating Concrete: Eco-SCC

Author(s): Khayat

Publication: Web Session

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Appears on pages(s):

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DOI:

Date: 3/27/2022

Abstract:
Commitment to reducing the environmental impact of concrete is of great importance nowadays. In case of self-consolidating concrete (SCC), this is of critical significance given the fact that the binder content of such concrete needed to ensure the required rheological properties is normally high. The present study aims to propose an appropriate design approach for producing SCC of low carbon footprint (Eco-SCC) for building applications. The presentation elaborates the step-by-step methodology to develop the Eco-SCC including packing density approach to optimize the volumetric proportions of sand and coarse aggregate to achieve an ideal particle gradation curve. The water content is adjusted to provide the necessary minimum paste volume to obtain self-consolidating properties. The powder composition is determined according to rheological optimizations of pastes to reduce the water demand while satisfying mechanical properties and durability considerations. Such design method is found to be effective for obtaining Eco-SCC. Mixtures with total powder content ranging from 280 to 310 kg/m3 are shown to exhibit satisfactory workability characteristics and 28-day compressive strengths in the range of 25 to 30 MPa and low drying shrinkage for building applications.