DBPapers
DOI: 10.5593/sgem2017/12/S02.008

APPLICATION OF RECYCLED CONCRETE AGGREGATE IN ROAD ENGINEERING

E. Sobol, W. Sas, A. Gluchowski, K.U. Gabrys, A. Szymanski
Sunday 10 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-99-5 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 12, 55-62 pp, DOI: 10.5593/sgem2017/12/S02.008

ABSTRACT

Recycled Concrete Aggregate is a material resulting from the crushing of concrete elements. Currently, as a result of increased demand for natural aggregates, artificial aggregates are sought as an alternative materials in civil engineering activities. Recycled Concrete Aggregate characterizes high strength, but some properties, both mechanical and physical, remains unclear, which often discourages engineers to use this material.
The paper presents the results of the California Bearing Ratio (CBR) and cyclic CBR (cCBR) of Recycled Concrete Aggregate. The study was preceded by an analysis of the physical properties of the material. Determination of the CBR and cCBR were conducted for soil in optimum moisture and air-dry state, also such unfavorable conditions as full saturation and low soil compaction were included. This parameters are significant for road constructions, especially Resilient Modulus obtained from repeated loading tests which nowadays play an important role in road design. Resilient Modulus (Mr) is part of mechanistic-empirical design which replaces common empirical method based on CBR tests. In this paper results of CBR, cCBR (repeated loading tests) will be presented as well as methodology of material examination.

Keywords: cyclic, CBR, recycled concrete aggregate, road engineering, geotechnics