equipment hamm

7/23/2019 Equipment Hamm

1/25

HAMM ROLLER SUMMARY

Nebraska DOT

Hamm Oscillation Review

February 2012


2/25

Introduced by HAMM in 1983

28 years of continuous development

Benefits of Oscillation


3/25

Europe Had a Serious Need for Non-Aggressive Compaction



4/25

By 2001 ~ 80% of Hamm tandem roller sales in Europe were oscillatory rollers



5/25

So why bring it to the U.S.?

European style mixes are prevalent

The industry has changed and grain crushing,achieving bonus and avoiding penalties are ahuge issue

Joint construction is poor and usually the first

area to failTAC (time available for compaction) is critical temperature sensitive

Contractors want solutions!



6/25

Introduced into the U.S. (South Carolina) in 2002

Tested as a breakdown roller No

significant benefit was realized



7/25

Conventional Vibration


8/25

Oscillation


9/25

1 Setting: On/Off

Oscillation

Handling

Oscillation


10/25

soft stiff

Self-adjusting amplitude

Oscillation

Handling


11/25

Vibration Oszillation



12/25

CO DOT introduced a cold joint density requirement of88% on state work

18 months after implementation, not a single contractorhad been able to achieve the joint density spec and werefactoring in penalty costs to the job

Brannon S&G using the Hamm HD O90V was able to

consistently achieve joint density between 89% - 91%

CO DOT continues to enforce the specification andpromote the ozzi as the contractors solution

No damage Cold Joints


13/25


14/25


15/25

Vibration


16/25

Better Consistency

across full width of mat


17/25

Why is this so?

! With constant Vibration the material

will eventually give.

! With constant Oscillation the drum

will eventually give.

! If the mat can be squeezed the

Oscillation drum will continue to work.

! If the mat is fully compacted the

Oscillation drum will scuff but notcause damage to the mat.

! The end result is consistent density

numbers across the width of the mat.


18/25

Changes to PA Turnpike Manual

Specifications revised in Section 401 and 409

Use vibratory rollers only when permitted by the

representative and only to compact authorized lifts ofbituminous concrete base course material or authorized

lifts of binder course material 3 inches or greater in

depth.

Oscillatory rollers that do not impact will bepermitted as intermediate or finish rollers for all

courses


19/25

Oscillation

Oscillation Effects in the Mat

When horizontal compaction is complete, vertical compaction continues


20/25

Oscillation

Oscillation Effects in the Mat

When vertical compaction is complete, horizontal compaction continues


21/25

Make it or Break it The Ozzi Zone

Paver screed

75 to 82%

The Common Solution


22/25

Oscillation summary

You cannot over compact better quality

No chatter marks better quality

No vibration to environment and machine better quality

No damage to cold joints - better quality

Ability to work effectively on cooler mixes - better quality


23/25

LARGE HD SERIES


24/25

HD+

Hydraulic offset to either side

! Improved from 3.9 to 6.7 either side.

!

Big enough to pinch a joint.


25/25

A reminder - if you dont

use Oscillation!

equipment hamm

Documents