TH 110 Project –CIR, DCT, IC, PMTP, & a Few Other Acronyms

Tim Clyne, MnDOT

MAAPT 64th Annual Asphalt Conference

Wednesday, December 6, 2017

PROJECT LOCATION

PROJECT DESCRIPTION

“Just” a Glorified Mill & Overlay CIR chosen to mitigate reflective cracking

Turn Lane Additions, Access Modifications

Box Culvert – Dakota County Trail

Drainage Improvements

Sign Replacements

Guardrail, ADA, Traffic Loops, etc.

Traffic Control – Full Directional Closures

CONSTRUCTION CONTRACT

A + B Letting (Pay Items + Time)

$9.57 million

S.M. Hentges & Sons, Inc. – Prime Contractor

McNamara Contracting, Inc. – Bituminous Paving

Midstate Reclamation & Trucking – CIR & Milling

MnDOT Oakdale Construction Office

ALPHABET SOUP

CIR = Cold In-Place Recycling

DCT = Disk-Shaped Compact Tension Test

IC = Intelligent Compaction

PMTP = Paver Mounted Thermal Profile

IHNIWTOM = I Have No Idea What This One Means

TYPICAL SECTION

CIR TRAIN

Water Truck

Pickup Machine+ Paver

Emulsion

Recycling Unit

Mill

Roller(not pictured)

(Courtesy Midstate Reclamation & Trucking)

SHOWTIME!

ESTABLISH ROLLING PATTERN

ESTABLISH ROLLING PATTERN

EMULSION APPLICATION RATE

THICKNESS CHECKS

GRADATION CHECK

PMTP RESULTS – HMA OVERLAY

Lift 1 - $102 Bonus Lift 2 - $668 Deduct

Each Lift: ~85% Coverage

IC RESULTS – HMA OVERLAYEach Lift: > 99% Coverage

CIR IC Results Not Yet Available

LIFT 2 FINAL COVERAGE

CMV

SPEED

TEMPERATURE

DCT RESULTS

Mix Design MnDOT Gf = 664 J/m2

Contractor Gf = 599 J/m2

Specification Gf = 450 J/m2

Production Mix proportions changed

from 24% Granite Sand / 0% Limestone Sand to 16% Granite / 8% Limestone Ave. Gf = 513 J/m2

~23% reduction

LESSONS LEARNED

CONSTRUCTION PLAN

CROSS-SLOPE CORRECTION

Variable Depth Milling

EQUIPMENT MANEUVERABILITY

SUMMARY

Project Selection – Existing Pavement Investigation

Design – Proper Construction Plan

Pay Attention to Details – CIR & Paving Operations

PMTP Data – Moderate Temperature Differential

IC Data – Valuable QC Data for Compaction

DCT Data – Mix Passed Fracture Energy Criteria

Great Teamwork & Communication

Tim Clyne

651-234-7350 (office)

651-775-1055 (cell)

tim.clyne@state.mn.us