Fresh State Properties of Self-compacting Concrete with Recycled Aggregates - A Literature Review

Abstract

This paper presents a literature review on the Fresh state properties of selfcompacting concrete with fine and coarse recycled aggregates. The growing environmental awareness of today's society causes greater concern with the high consumption of natural resources and the waste originated by the activities of the various industries. In particular, the construction industry consumes a large part of those resources and is, currently, the main responsible for the production of waste in Europe, whose dumping and treatment results in severe environmental and economic consequences. Given that concrete is the most commonly used material in the construction activity, it becomes a significant portion of the construction and demolition waste. In this context, the work developed intends to present a literature review on the incorporation of recycled aggregates (RA) in the production of self-compacting concrete (SCC). For each concrete property, the following information was collected: type and physical characteristics of the materials used for SCC production; mix composition; tests results; discussion and conclusions on those tests. A description of the experimental campaigns performed is first presented. Next, each fresh state property of the SCC is analyzed based on the results obtained by the various authors. The concrete's properties analyzed in the fresh state are: slump-flow diameter and slump flow time, V-funnel time, L-box, J-ring and sieve segregation. The theme of SCC with RA is of great relevance to society since this increasingly requires the construction industry to adopt new processes that minimize the negative impacts on the environment.