PROMONTORY SEAL COAT DEMONSTRATION PROGRAM

Pat Hill & John WoodCity of Greeley – Engineering Division

The experts

City of Greeley Pavement

Maintenance Staff

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0102

03

Greeley has always been proactive with the use of

seal coating for maintenance practices

Develop a test program to compare the different seal coats used in Colorado in one location

COMPAREEnsure all test sections receive

similar traffic loadings and atmospheric effects, on a

“typical” segment of road with uniform distresses

HOMOGENEITY

Perform monthly evaluations of each section, and make the

findings available to the public

RESULTS

PROJECT GOALS

City of Greeley - Promontory Seal Coat Demonstration Program 4Aerial photographs courtesy of Andy Gilmoreand the Greeley Police Department

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HISTORY

Project began as a discussion between Pat Hill and John Wood. We saw the need to compare the many new technologies and products in pavement preservation

CONCEPTION

A plan was developed to create a pilot project to evaluate seal coat materials and processes, placed on the same road at the same time exposed to the same conditions

PLANNING

After test site was identified, the test sections were awarded on a “first come, first serve” basis.

We wanted to avoid having duplicate sections

LOCATION

Vendors were to supply material and labor at no cost to the City. NCTC was selected to provide

traffic control

VENDORS

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SITE ORGANIZATION & DETAILSDivided into 14 total sections, each 100’ long and 31’ wide

SECTIONSA 20’ long segment of road between sections 9 and 10

was selected to act as a control

CONTROLFeatures a wide variety of products and applications

from multiple vendors

VARIABILITY

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SECTIONSAPPLIED

The sections were applied between July and October of 2016. The 11 separate closures required excellent communication with local residents

TIMELINE

Andale• 1 – HA5 High Density

Mineral Bond

Foothills Paving• 4 – ¼” Chip Seal• 5 – Type II Slurry Seal• 10 – 2X ⁄3 8” Chip Seal

Vance Brothers• 6 – USS Type III• 7 – GSB-88• 9 – USS Type II

DISSCO• 8 – RS-90

COBITCO• 2 – Reclamite (.05 gal/SY)• 3 – Reclamite (.07 gal/SY)

SealMaster• 11 – Master Seal• 12 – PMM• 13 – Liquid Road• 14 – Color Pave HD 500

Products

Vance Brothers

DISSCO

Foothills Paving

Andale Construction

SealMaster

COBITCO

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SECTIONS BY APPLICATION TYPE

28%

MACHINE PLACED

36%

SPRAY/HANDWORK

36%

SPRAY ONLY

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NUMBER OF SECTIONS PER MATERIAL TYPE

0

3

6

CHIP SEAL SEAL COATFINE AGGREGATESEAL COAT

REJUVENATE

45

12

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COBITCOReclamite

Foothills PavingType II Slurry

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DISSCORS-90

SealMasterLiquid Road

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Vance BrothersUSS Type II

SealMasterColor Pave HD 500

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EVALUATION& ANAYLSIS

To analyze the performance of the seal coat products, staff developed a process to evaluate the seal coats and publish the findings over the next two years

PERFORMANCE

There are 9 criteria upon which each section is evaluated on a 1 through 5 scale

CRITERIA

Evaluations are consistently conducted by multiple members of the SIM staff around the 1st of each month

INSPECTION

MONTHLYINSPECTOR

EVALUATION

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SEAL COATWEBSITE• Evaluations are made available to the public

through the Keep Greeley Moving website

• From there, anyone can find pictures/videos of construction, information about the material, and

• http://keepgreeleymoving.com/2016-seal-coat-test/

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MOVINGFORWARD

Project is approximately two thirds through its life cycle, with final evaluations planned for the Fall of 2018. After two full Winters and one Summer of wear, each section has started to show some degree of deterioration

CURRENTLY

Greeley will continue to monitor each section closely as snow plow damage, weathering, and wear continue to degrade the seal coat materials

Ongoing Analysis

Moving forward. Where do we see the project after a year and a half? In five years?

NEXT STEPS

5 different interlayers 150’x48’ sections Fabric installed priorto leveling course

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Pavement Interlayer Demo

• Section 1: Huesker – “FRC-40”• Section 2: Tensar – “GPO-50”• Section 3: Tencate – “MPG4”

• Section 4: Tencate – “M-50”• Section 5: Owens Corning – “TruPave”

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Fiber Reinforced Asphalt Demo• “Forti-Fi” installed on

22nd St – 28th Ave to 35th Ave• 2,363 lbs. of fiber & 2,393 tons of asphalt

• “Nilex” installed on 6th Ave – 18th St to 22nd St

• 1,784 lbs. of fiber & 1,956 tons of asphalt

ANY QUESTIONS?THANK YOU!