intelligent compaction - texas a&m university · blind vs. intelligent compaction . 4 . gps...
TRANSCRIPT
Understanding the Technology
INTELLIGENT COMPACTION
Jimmy Si, Ph.D., P.E. College Station, TX, Oct. 14, 2014
Table of Contents
4-6
7
8
9
3 Why IC?
What is it?
What does IC provide us ?
How to use the IC information?
IC benefits
1
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
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IC resources
