Title: Eco-Efficient Self-Consolidating Concrete (Eco-SCC) with Low Powder Content and Recycled Concrete Aggregate

Author(s): Jiong Hu

Publication: Web Session

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Date: 10/15/2018

Abstract:
One of the main obstacles that prevents the wide use of self-consolidating concrete (SCC) is the high cost and environmental impact associated with the high powder content. This paper presents a preliminary study of the development of eco-efficient SCC (Eco-SCC) with a powder content comparable to conventional vibrated concrete and recycled concrete aggregate (RCA). Results showed that while the lower amount of powder materials and the use of RCA did affect the concrete behaviors of SCC, most of the mixtures included in the study showed good flowability, passing ability, stability and strength that well satisfied criteria of SCC. An environmental performance evaluation was also performed to justify the environmental benefit of Eco-SCC. The study demonstrated that through the optimization of particle size distribution and the optimum use of chemical admixtures, it is possible to obtain Eco-SCC with engineering properties comparable to traditional SCC yet more environmentally friendly.