slaking caharacteresitc useful for further reserach.pdf

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1. Introduction
Dry and
wet cycle
Slaking–is particle breakage, subjected to dry/wet cycle.
Influenced by
1.Dry/wetcycle 2.Temperature
Dry/wet
cycle
mudstone
Particle
breakage
Void
reduction
Sever settlement along crust in
Turkey (Cetin et al., 2000)
Reduces
permeability
Increase shear
deformation
Increase water
pressure
Shear failure Tomei express
way (Yasuda et al 2012)
Reduce the
shear strength
Dam failure (Kiyota et al 2012)
Increase the
fine
Increase water
pressure
Internal erosion
(Sattar et al, 2011)
Causes Causes Failures/disaster
(Sakai et al 2019)
Particle
breakage
•Slaking material
•Being highly encountered and surplus material, usage
of mudstone for earth structures is one feasible option
(Yoshida et al., 2002)
•Mudstone structures commonly fail due to excessive
settlement and shear failures.
•Kiyota et al (2011) observed eroded and washed-out
particles in mudstone dam failure. Sattar et al (2011)
suggested that failures could be occurred by internal
erosion.
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2. Brief Research motivation is to investigate changes of Root causes along the
independent variants, andfind the correlation between Root causes and its
Consequences.
Crushed mudstone under creep condition
Applying dry/wet + temperature variation
Particle breakage
(Zhang,etal 2016)
Void reduction
(Nakano,etal 1998)
Mechanical strength
(Zhang,etal 2016)
Internal erosion
Lower
PI
Influence by slaking degree and stress condition
Development of vertical strain/settlement/slope failures,
causing several infrastructure failures.
Mallaet al.,(2007),Nakano.,(1967),Takagi et al.,(2007)
Changning in particle breakage and void changing the internal
erosion phenomena while increasing the hydraulic pressure,
that was recorded by (Sattar et al., 2011)
Consequences
Root causes
phenomena
Independent variants
State of Research-Slaking vs vertical strain/Breakage-Objective
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