Understanding the Technology

INTELLIGENT COMPACTION

Jimmy Si, Ph.D., P.E. College Station, TX, Oct. 14, 2014

Table of Contents

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3 Why IC?

What is it?

What does IC provide us ?

How to use the IC information?

IC benefits

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2

3

4

5

2

IC resources 10 6

Why Intelligent Compaction (IC)?

What are the key characters for a good soil and base compaction? – High Compressive/Shear Strength – High Stiffness/Modulus – Low Permeability – Low Swell/Shrink – Low Settlement – Uniformity and Consistency

Do we know for sure a good compaction has been achieved? Can we do a better job?

Blind vs. Intelligent Compaction

4

GPS Receiver

Display Panel

What Is IC?

A vibratory roller equipped with a stiffness measurement system that continuously measures and reports the material’s stiffness in real time

A GPS-based documentation system that continuously records and reports the roller locations in real time

An onboard display panel showing a color-coded map of stiffness and roller’s locations in real time

Accelerometer

Available IC Rollers and Measurements

Caterpillar: CMV, MDP

Dynapac: CMV

Bomag: EVIB (MN/m²)

Sakai: CCV

Case/Ammann: kb (MN/m)

5

Hamm: HMV

TxDOT IC Retrofit Kit

6

Accelerometer

Receiver

Display Panel

IC Retrofit Kit

What information does IC provide us ?

Pass Counts Stiffness

Pass Counts

Stiffness

How to use the IC information?

Color-coded Map

Station Number

Density/Moisture

IC benefits

Provides uniformity information 100% coverage of the compacted area

Tracks roller locations and pass counts

Identifies areas of under/over compaction

Monitors compaction process in real time and improves productivity and minimizes cost

Provides performance-based info as a better link to mechanistic pavement design

Improves safety in construction zones

9

IC resources

Jimmy Si, Ph.D., P.E.

512-506-5901

Jimmy.Si@txdot.gov

Questions?