1 Producing Sealing Aggregates to Optimise Performance on Spray Sealed Pavements Engineering Businesses to Drive Operations Excellence 1996 - today November 2015
Andrew Wachtels presentation on sealing aggregates and precoating November 201
Jan 22, 2018
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1
Producing Sealing Aggregates to
Optimise Performance on Spray Sealed Pavements
Engineering Businesses to Drive Operations Excellence
1996 - today
Nove
mb
er 2
01
5
2
What is a good or acceptable sealing aggregateA
gg
re
gate
p
ro
pe
rtie
s
Grading
Fines
Flakiness
Los
Angeles
PSV/PAFV
3
Sh
ap
e o
f a
gg
re
gate
s
Why are river
gravel rocks
round ?
Why are
crushed rocks
cubic and non
cubic
4
Sh
ap
e o
f a
gg
re
gate
sWhy is ALD important in
sealing aggregates ?
5
Size
o
f a
gg
re
gate
sNominal Sizes
14mm
10mm
7mm
5mm
6
Ag
gre
gate
s p
ro
pe
rtie
sHow do you pre coat aggregates
Is dust on a conforming aggregate good or bad ?
7
Wa
sh
in
g a
gg
re
gate
s
Wash screen
8
Pre
c
oatin
g P
ro
ce
ss
Washed Aggregate to be pre coated
9
Pre
c
oatin
g P
ro
ce
ss
10
Pre
c
oatin
g P
ro
ce
ss
11
Pre
c
oatin
g P
ro
ce
ss
12
Pre
c
oatin
g P
ro
ce
ss
13
Pre
c
oatin
g P
ro
ce
ss
14
Pre
c
oatin
g P
ro
ce
ss
15
Pre
c
oatin
g P
ro
ce
ss
16
Qu
estio
ns
thank you for your time
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