No. 32 (2010), Coastal Structures
No. 32 (2010)

WEATHERING OF ROCK AS ARMOURSTONE: A CASE STUDY ON BAHRAIN LIMESTONE

Coastal Structures
Published 2011-01-26
Andrea Caricato
Scott Wilson Ltd
Leo Woods
Scott Wilson Ltd
Chandra Mohan
Scott Wilson Ltd
Proceedings of the 32nd International Conference
PDF

Keywords

armourstone
degradation
weathering
micro-deval
armourstone quality designation
Bahrain

How to Cite

WEATHERING OF ROCK AS ARMOURSTONE: A CASE STUDY ON BAHRAIN LIMESTONE. (2011). Coastal Engineering Proceedings, 1(32), structures.32. https://doi.org/10.9753/icce.v32.structures.32
ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver AMA

Download Citation

Endnote/Zotero/Mendeley (RIS) BibTeX

Abstract

Locally-sourced armourstone is used extensively in the construction of new sea defence structures throughout Bahrain, with hundreds of thousands of tonnes being placed on single reclamation projects. This armourstone is won almost exclusively from the local quarry, which outputs limestone of variable quality. An evaluation has been made into the quality of local rock for usage as armourstone, using observations on sites and at the quarry, as well as compliance test results from various projects undertaken in recent years. Attempts are made to quantify potential losses in-service, by using the two degradation models described in the CIRIA Rock Manual, which give markedly different estimates. The envisaged loss of mass is difficult to predict with great accuracy due to the high sensitivity of the models to material and site parameters. Plots of estimated mass loss over time are presented for different rock sizes and different levels of rock armour mobility.
PDF

References

BS EN 1097-1. 2004. Tests for Mechanical and Physical Properties of Aggregates - Part 1: Determination of the Resistance to Wear (Micro-Deval). BSI, London

CIRIA, CUR, CETMEF. 2007. The Rock Manual. The Use of Rock in Hydraulic Engineering (2nd Edition). C683, CIRIA, London

Erickson, R.L. 1993. Evaluation of Limestone and Dolomite Armor Stone Durability From Observations in the Great Lakes Region. In Rock for Erosion Control, ASTM special technical publication 1177

Latham, J.P. 1991. Degradation Model for Rock Armour in Coastal Engineering, The Geological Society, London, Quarterly Journal of Engineering Geology, 24, 101-118.http://dx.doi.org/10.1144/GSL.QJEG.1991.024.01.11

Latham, J.P., Lienhart, D., Dupray, S. 2006. Rock Quality, Durability and Service Life Prediction of Armourstone. Engineering Geology, 87 (2006) 122-140http://dx.doi.org/10.1016/j.enggeo.2006.06.004

Lienhart, D.A. 1998. Rock Engineering Rating System for Assessing the Suitability of Armourstone

Sources. The Geological Society, London, Engineering Geology Special Publications 1998, v. 13, 91-106

PMCid:1496907

Lienhart, D.A. 2003. A Systems Approach to Evaluation of Riprap and Armor Stone Sources. The Geological Society of America, Environmental & Engineering Geoscience, Vol. IX, No. 2, 131-149http://dx.doi.org/10.2113/9.2.131

Rangaraju, P.R. & Edlinski, J. 2008. Comparative Evaluation of Micro-Deval Abrasion Test with Other Toughness/Abrasion Resistance and Soundness Tests. Journal of Materials in Civil Engineering, Volume 20, Issue 5, pp 343-351

Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.