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

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Lower emissions

Hot mix Evotherm

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Fume exposure compared to HMA

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Lower stack emissions with Evotherm compared to HMA

250 °F Evotherm, 310°F HMA control

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Improved Rubberized Mix Compaction with Evotherm

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Improved Rubberized Asphalt Compaction with Evotherm

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Product Development EffortsEvoflex RMA

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Florida DOT Specification

▪ 1993 inception

▪ Politics versus performance

▪ 7% minimum mandate

▪ 2014 binder specification update (PG 76-22 Hybrid ARB)

▪ Separation specification

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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

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How easy is it?

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▪ Easy drop in to existing SBS systems

▪ 8mm pellet can be pneumatically conveyed

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How is asphalt modified?

▪ Terminal blend using a Siefer mill

▪ Plant blend with GTR blend unit

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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

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Evotherm and Evolfex RMA│ Tuesday, June 19, 2019

Storage Stability

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• Elite Binder Properties

• Long Term tank storage

Evoflex RMA Fatigue Performance

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0

200

400

PG 76-22 StellarFlex GTRH

278 249

Texas Overlay Test, cycles

Evoflex RMA PG 76-22

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Number of Passes

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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

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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

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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

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Field Performance –PA-63

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Wisconsin GTR Trial – June 2019

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Where has Evoflex RMA been utilized?

▪ Arizona

▪ Florida

▪ Georgia

▪ Illinois

▪ Kentucky

▪ New Hampshire

▪ New Jersey

▪ Ohio

▪ Pennsylvania

▪ Tennessee

▪ Vermont

▪ Wisconsin

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Presentation title │ Date22

Come over to the booth with QuestionsThanks for your time!