Optimizing Rubberized Asphalt with Evotherm and Evoflex® RMATrey Wurst
VPRISTuesday, 19 June, 2019
Evotherm is the industry’s leading warm mix paving solution.
Comprehensive additive package
Optimized to deliver
• Mixing
• Coating
• Workability
• Compaction
• Adhesion
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Evotherm uses natural chemicals derived from pine trees
Additives are comprised of specialty surfactants derived from pine trees
Specifically developed for use in asphalt applications
– Heat stable
– High flash point
– Low odorHydrophillic head
Asphalt
Hydrophobic tail
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Rubberized Asphalt Improvements with Evotherm
1. Lower Emissions
2. Improved Compaction
4 Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Lower emissions
Hot mix Evotherm
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Fume exposure compared to HMA
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Lower stack emissions with Evotherm compared to HMA
250 °F Evotherm, 310°F HMA control
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Improved Rubberized Mix Compaction with Evotherm
Evotherm and Evolfex RMA│ Tuesday, June 19, 20198
Improved Rubberized Asphalt Compaction with Evotherm
9 Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Product Development EffortsEvoflex RMA
10 Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
11
Florida DOT Specification
▪ 1993 inception
▪ Politics versus performance
▪ 7% minimum mandate
▪ 2014 binder specification update (PG 76-22 Hybrid ARB)
▪ Separation specification
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Hybrid pellets
GTR, SBS and chemical additives
•Solubilize SBS polymer and disperse within GTR matrix
•Pre-disperse polymer, improves networking efficiency
•Flexible formulation components (custom compound options)
•Additive interaction improves storage stability
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
How easy is it?
13
▪ Easy drop in to existing SBS systems
▪ 8mm pellet can be pneumatically conveyed
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
How is asphalt modified?
▪ Terminal blend using a Siefer mill
▪ Plant blend with GTR blend unit
14 Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Product Designation Meaning
• Evoflex RMA name designation is created based on ingredient content
• Evoflex RMA 725 for example
7 2 5
75% GTR 20% SBS 5% Chemistry
15 Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Storage Stability
16
• Elite Binder Properties
• Long Term tank storage
Evoflex RMA Fatigue Performance
17
0
200
400
PG 76-22 StellarFlex GTRH
278 249
Texas Overlay Test, cycles
Evoflex RMA PG 76-22
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000
Number of Passes
Ru
t D
ep
th (m
m)
Stripping
Inflection
Point
(SIP)
Number of
Passes to
Stripping
Inflection Point
(SIP)
Number of
Passes
Failure, N f
Evoflex RMA – Rutting Performance
18
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000 12,000 13,000 14,000 15,000 16,000 17,000 18,000 19,000 20,000
Vert
ical D
efo
rmati
on
(m
m)
Loading Cycles (n)
Left Wheel
Right Wheel
TxDOT Specification: > 10,000 Cycles @ 12.5 mm Rutting
PG 76-22 PMA
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000 12,000 13,000 14,000 15,000 16,000 17,000 18,000 19,000 20,000
Ve
rtic
al
De
form
ati
on
(m
m)
Loading Cycles (n)
Left Wheel
Right Wheel
TxDOT Specification: > 10,000 Cycles @ 12.5 mm Rutting
Evoflex RMA PG 76-22
Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Field Performance –PA-63
19 Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Wisconsin GTR Trial – June 2019
20 Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Where has Evoflex RMA been utilized?
▪ Arizona
▪ Florida
▪ Georgia
▪ Illinois
▪ Kentucky
▪ New Hampshire
▪ New Jersey
▪ Ohio
▪ Pennsylvania
▪ Tennessee
▪ Vermont
▪ Wisconsin
21 Evotherm and Evolfex RMA│ Tuesday, June 19, 2019
Presentation title │ Date22
Come over to the booth with QuestionsThanks for your time!