Cyclic loading tests on sandstone and limestone shale aggregates used in unbound forest roads.
Rodgers, Michael Hayes, Gregory Healy, Mark G.
Rodgers, Michael
Hayes, Gregory
Healy, Mark G.
Repository DOI
Publication Date
2009-06-01
Type
Article
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Citation
25. Rodgers, M., Hayes, G., Healy, M.G. 2009. Cyclic loading tests on sandstone and limestone shale aggregates used in unbound forest roads. Construction and Building Materials 23: 2421 - 2427.
Abstract
This study examined the performance of two aggregates subjected to cyclic loading in a large-scale test rig. The two aggregates examined were: (i) a sandstone from Co. Cork, Ireland and (ii) a limestone shale from Co. Limerick, Ireland. The aggregates were classified and their engineering properties established and compared. Various depths of the aggregates, overlaying a 1 m-deep formation layer, were compacted and subjected to a cyclic loading regime of incrementally increasing pressures of 500 kPa, 750 kPa and 1,000 kPa. Each aggregate was tested for up to 150,000 load applications. The resilient pressures, resilient surface deflections and permanent deformations were measured. The sandstone performed well in a dry state but poorly when wetted up. The shale behaved poorly but the addition of a wet mix macadam (WWM) layer greatly improved its performance.
Publisher
Construction and Building Materials
Publisher DOI
10.1016/j.conbuildmat.2008.10.007
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland