Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/208263

Title

Geotechnical properties of waste excavation rock in pavement sub-base applications

Author(s)

Arulrajah, Arul;  Ali, M. M. Y.;  Piratheepan, J.;  Bo, M. W.

Abstract

This paper presents the findings of an extensive laboratory investigation on the geotechnical properties of waste excavation rock in pavement sub-bases. The waste excavation rock used in this study originated from 'basalt floaters' or surface excavation basalt rock (basalt). Traditionally this material would have been disposed as waste, often into landfill. The engineering properties of the crushed basaltic waste rock were compared with the local road authority specifications to assess its performance as a pavement sub-base material. The experimental programme was extensive and included tests such as particle size distribution, modified Proctor compaction, particle density, water absorption, California Bearing Ratio, Los Angeles abrasion loss, pH, organic content, static triaxial and repeated load triaxial tests. The Los Angeles abrasion loss value obtained indicated that the crushed basaltic waste rock is durable. California Bearing Ratio values were found to satisfy the local state road authority requirements for a lower sub-base material. Repeated load triaxial testing established that the crushed basaltic waste rock would perform satisfactorily as a pavement sub-base material in the field. The results of the laboratory testing undertaken in this research indicated that crushed basaltic waste excavation rock satisfied the criteria for use in pavement sub-base applications.

Publication type

Journal article

Research centre

Swinburne University of Technology

Source

Journal of Materials in Civil Engineering, Vol. 24, no. 7 (Jul 2012), pp. 924-932

Publication year

2012

FOR Code(s)

0905 Civil Engineering;  0912 Materials Engineering

Keyword(s)

Excavation rock;  Pavements;  Permanent strain;  Repeated load triaxial;  Sub-base materials;  Waste rock

Publisher

American Society of Civil Engineers

ISSN

0899-1561

Publisher URL

http://dx.doi.org/10.1061/(ASCE)MT.1943-5533.0000419

Copyright

Copyright © 2011 by the American Society of Civil Engineers.

Peer reviewed