1. Viscoelasticity & Performance of Polymer Modified Mastic Binders
Daru Widyatmoko

2. Presentation Layout Introduction Statement of Problem
Mastic Binder – Definition
Mastic Binder - Composition
Empirical Tests
Rheological Test
Mixture Performance

3. Mastic Asphalt - Introduction
Used in bridge surfacing, roofing, waterproofing, car park surfacing, etc
Bitumen or modified plus Trinidad Lake Asphalt (TLA)
Limestone fine aggregate with 50% passing 75µm
About 45% single size coarse aggregate added to remelted epuré, final binder content %
Placed at °C,and dressed with chips
No compaction required

4. Trinidad Lake Asphalt (TLA)
Penetration dmm
Ring & Ball Softening Point 93 – 99 oC
Soluble bitumen 53 – 55%, mineral matter 36 – 37%, other 9 – 10%
Maltenes 63 – 66%, asphaltenes 34 – 37%

5. Statement of Problem

6. ‘Mastic’ Binders - Definition
Binder used in mastic asphalts
Control: Bitumen plus TLA
60/80 Pen Bitumen
30% Bitumen, 70% TLA
Polymer Modified Binder plus TLA
3 Elastomeric Binders, 50 – 70% TLA
1 Plastomeric Binder, 15 – 25% TLA

7. Mastic Binder - Composition
Properties
Sample ID
Base Binder
Added TLA
Pen at 25 o C
(dmm)
RBSP ( C) A
60/80pen Bitumen - 71
48.0 E
70% 11
70.0 B
Elastomeric B 41
111.0 D
50% 15
88.0 K
Elastomeric H 51
112.0 S
60% 12
103.4 L 14
105.0 M
Elastomeric M 88 N 32
101.4 O 19
98.0 R
Plastomeric R U
25%
99.4 W
15%

8. Empirical Tests Penetration (BS EN 1246)
Ring & Ball Softening Point (BS EN 1247)

10. (Pen New) = (Pen A)a * (Pen B)b

12. (RBSP New) = a (RBSP A) + b (RBSP B)

13. Summary – Empirical Test
60/80 Pen + TLA
Reduce Penetration
Increase Ring & Ball Softening Point
PMB + TLA
Reduce Ring & Ball Softening Point
But, Ring & Ball Softening Point of PMB + TLA still higher than 60/80 Pen + TLA

14. Rheological Test Controlled Stress Dynamic Shear Rheometer
Parallel plate: 8 or 25 mm diameter size
Spindle size 8 or 10mm
Strain rate 1%

15. DSR Oscillatory Loading
time
Position of Oscillating Plate
Oscillating Plate
Applied Stress or Strain A C B
1 cycle
Bitumen C B A
Fixed Plate

19. Cold
Hot

20. Hardening
Softening

22. Cold
Hot

23. Cold
Hot

24. Summary – Rheology (1) 60/80 Pen + TLA Elastomeric + TLA
High temperature : + G* & - d
Intermediate temperature: + G* & - d
Low temperature: + G* & - d
Elastomeric + TLA
High temperature: -G* & + d
Intermediate temperature: + G* & + d
Low temperature: + G*& + d

25. Summary – Rheology (2) Plastomeric + TLA But,
High temperature: - G* & + d
Intermediate temperature: +G* & + d
Low temperature: + G* & + d
But,
At high temp: PMB + TLA still more elastic (<< d) and stiffer (>> G*) than 60/80 Pen + TLA
At low temp: PMB + TLA less elastic (>> d) but less stiff (<< G*) than 60/80 Pen + TLA

26. Mixture Performance
Stiffness properties
Resistance to deformation
Resistance to low temperature cracking
Resistance to fatigue cracking
Shear & tensile adhesion

28. 60/80 Pen Plastomeric Elastomeric
Composite

29. Composite
60/80 Pen Plastomeric Elastomeric

30. Thank you for listening Any question?