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Title: Particle Packing and Mixture Design Approach for Eco-SCC

Author(s): Kamal Khayat, Olafur Wallevik, Behrouz Esmaeilkhanian

Publication: Web Session

Volume: ws_F18_Khayat.pdf

Issue:

Appears on pages(s):

Keywords:

DOI:

Date: 10/15/2018

Abstract:
The study proposes an appropriate design approach for producing SCC of low carbon footprint (Eco-SCC). The maximum powder content for an Eco-SCC mixture is typically set to 315 kg/m3. The design method is based on optimization of the volumetric proportions of sand and coarse aggregate according to an ideal particle gradation curve. The water content is adjusted to provide the necessary minimum paste volume to obtain self-consolidating properties. The cement, supplemental cementitious materials, and fillers are determined according to rheological optimization of paste to reduce the water demand while satisfying mechanical properties, durability aspects, and environmental considerations. 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. The durability and drying shrinkage of the investigated mixtures are found to be adequate. The eco-efficiency of Eco-SCC mixtures is assessed and shown to be within the optimum area.