performance comparison of polymer- modified bitumen with...
TRANSCRIPT
Materials Science Research Group Department of Physics, UWI (Mona)
Performance Comparison of Polymer-modified Bitumen with Virgin and
Recycled Polyethylene Plastics
Implications for road development and durability in Jamaica
Jhordanne J. Jones, Victor E. Douse, Keith L. Duncan Materials Science Research Group
UWI Mona
Materials Science Research Group Department of Physics, UWI (Mona)
Are any of these familiar to you?
Materials Science Research Group Department of Physics, UWI (Mona)
Introduction
Polymer-modified bitumen goes here
Materials Science Research Group Department of Physics, UWI (Mona)
Oxidation Polarity of Asphalt
Reduction in polar molecules
Fractures and permanent deformation
Greater affinity to water
Moisture Damage and Stripping
Limitations of Asphalt
Materials Science Research Group Department of Physics, UWI (Mona)
So… how can we improve the asphalt?
We could add plastic….
A Solution…
Materials Science Research Group Department of Physics, UWI (Mona)
A Solution….
BUT WHAT ABOUT US?
Materials Science Research Group Department of Physics, UWI (Mona)
Two types of polyethylene are used:
High density polyethylene (HDPE)
Low density polyethylene
(LDPE)
A Solution…
Materials Science Research Group Department of Physics, UWI (Mona)
Disadvantages of Asphalt Desirable Characteristics of Polyethylene
Susceptibility to oxidation
Susceptibility to water damage
Permanent deformation and fracture
Chemically resistant
Water resistant and weather-
proof
Durable , flexible and tough
What characteristics can Polyethylene give to Asphalt?
Materials Science Research Group Department of Physics, UWI (Mona)
Performance Evaluation of Modified Bitumen
Materials Science Research Group Department of Physics, UWI (Mona)
Penetration Grade
The penetration grade is a measure of how
adhesive the modified bitumen sample is
Performance Evaluation of Modified Bitumen
Materials Science Research Group Department of Physics, UWI (Mona)
Penetration Grade
0
10
20
30
40
50
60
70
0 5 10 15 20
Pen
etra
tio
n G
rad
e
Percentage virgin LDPE resin (%)
Penetration grade vs Percentage virgin LDPE resin
0
10
20
30
40
50
60
70
80
90
0 5 10 15 20
Pen
etra
tio
n G
rad
e
Percentage recycled HDPE/LDPE blend (%)
Penetration vs Percentage recycled HDPE/LDPE blend
Performance Evaluation of Modified Bitumen
Materials Science Research Group Department of Physics, UWI (Mona)
Marshall Stability
The Marshall Stability is a measure of how stable an
modified asphalt sample (binder plus aggregate and
filler) is once its maximum load is applied.
Performance Evaluation of Modified Bitumen
Materials Science Research Group Department of Physics, UWI (Mona)
Marshall Stability
24.3
24.4
24.5
24.6
24.7
24.8
24.9
25
25.1
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Mar
shal
l sta
bili
ty (
kN)
% Plastic Added
Marshall Stability vs Percentage Plastic Added
Recycled blend
Virgin resin
Performance Evaluation of Modified Bitumen
Materials Science Research Group Department of Physics, UWI (Mona)
Flow
The Flow measures the degree of deformation
from the initial state of the asphalt sample with
an applied load.
Performance Evaluation of Modified Bitumen
Materials Science Research Group Department of Physics, UWI (Mona)
Flow
-0.5
0
0.5
1
1.5
2
2.5
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Flo
w v
alu
e (
mm
)
% Plastic added
Flow value vs Percentage Plastic Added
Recycled blend
Virgin resin
Performance Evaluation of Modified Bitumen
Materials Science Research Group Department of Physics, UWI (Mona)
Marshall Quotient
The Marshall Quotient is an indication
of the sample’s susceptibility to
permanent deformation.
Performance Evaluation of Modified Bitumen
Materials Science Research Group Department of Physics, UWI (Mona)
Marshall Quotient
0
500
1000
1500
2000
2500
3000
0 2 4 6 8 10 12 14
Mar
shal
l Qu
oti
en
t (k
N/m
m)
% Virgin Plastic
Marshall Quotient vs Percentage virgin LDPE resin
0
500
1000
1500
2000
2500
3000
0 2 4 6 8 10 12 14 16
Mar
shal
l Qu
oti
en
t (k
N/m
m)
% Recycled Blend
Marshall Quotient vs Percentage recycled HDPE/LDPE blend
Performance Evaluation of Modified Bitumen
Materials Science Research Group Department of Physics, UWI (Mona)
Flash Point
The Flash point is the temperature at which
enough gases are given off from the heated
bitumen sample to sustain combustion.
Performance Evaluation of Modified Bitumen
Materials Science Research Group Department of Physics, UWI (Mona)
IN CONCLUSION…
•A small amount of plastic goes a long way • Recycled plastic is a viable and cost- effective alternative to virgin plastic
• Adding polyethylene not only strengthens the asphalt mixture, but provides a safer product by increasing the flash point.
Materials Science Research Group Department of Physics, UWI (Mona)
Implications….
• More durable, longer lasting roads • Millions of dollars saved on maintenance of roads
• Reductions in pollution
Materials Science Research Group Department of Physics, UWI (Mona)
Further Research…
• How is water drainage affected by bitumen modification? •Does the polyethylene additive affect skid resistance?
• How can we increase homogeneity?
Materials Science Research Group Department of Physics, UWI (Mona)
Thank You !