A New Approach To Estimate Armourstone
Abrasion: Modified Slake Durability Test
Author(s)
Ö. Acır & R. Kılıç
Abstract
Since armourstones are located in the outer shelter layer of breakwaters which
absorb the first impact of hydraulic wave energy, they are prone to the highest
degree of abrasion. Sea and atmospheric conditions damage the armourstone
integrity so they lose their engineering functions in time. Existing classification
systems to investigate the potential armourstone durability are performed on the
intact rocks obtained from stone quarries; hence they do not explain the abrasion
mechanism of armourstones actually used in the breakwater. For this reason, the
standard slake durability test method was modified based on physical modelling
techniques so that armourstone abrasion was simulated in realistic conditions.
Eastern Black sea water and basaltic armourstones of the Giresun port were used
in model tests. The model tests reveal that abrasion is inversely proportional to
the mass and dimension of the armourstone.
Keywords: Eastern Black sea, armourstone, modelling, modified slake
durability.
1 Introduction
The term \“modelling” is simply used for describing the investigation of events
and processes under a certain scale. Meanwhile, modelling in engineering
geology is generally referred to the studies performed to investigate either strong
ground motion (Krawnikler [15], Harris and Sabnis [9]) or mechanical behaviour
of geomaterials (Wood [20]).
Physical models, re-sized prototypes of engineering structures scaled by
Froude’s Law, are the basic elements of modelling approach (Hughes [11]).
Physical models are widely used to simulate the realistic effects of coastal
processes on the structure to perform damage analysis in a hydraulic laboratory
Keywords
Eastern Black sea, armourstone, modelling, modified slake
durability
Related Book
Other papers in this volume
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