Influence of Recycled Concrete Composition on its Elastic Stiffness

Abstract:

The presented study was focused on the influence of the micronized recycled a concrete sleeper on the mechanical properties of fine-grained concrete, specifically on dynamic modulus of elasticity. The tested material consisted of cement CEM I 42.5R (Radotín), crushed bricks fraction 2-5 mm, 0-4 mm sand and micronized recycled concrete fraction 0-0.125 mm. Individual material samples differed in the quantity of cement and finely ground recycled concrete (milled at Ltd. Lavaris, Libčice – Czech Republic). Cement was replaced by the recycled concrete in an amount of 30, 50 and 70 weight percent. Testing was performed on beams of dimensions 40 × 40 × 160 mm by using non-destructive testing – pulse method. The article compares the values obtained between 2-nd and 28-th day.

• Periodical: Key Engineering Materials (Volume 677)
• Pages: 288-291
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.677.288
• Online since: January 2016
• Authors: Zdeněk Prošek*, Andrej Osvald, Jaroslav Topič, Jan Valentin, Jan Trejbal, Pavel Tesárek
• Keywords: Binder, Brick, Cement, Mechanical Properties, Recycling

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