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Standards and Specifications - Crashworthy End Terminals
ADIEM II (Advanced Dynamic Impact Extension Module)

Trinity's ADIEM II web site.

Plan sheets of ADEIM II

Intended Use

ADIEM (Advanced Dynamic Impact Extension Module) is a high-performance, redirecting, energy-absorbing crash cushion and end treatment for portable and permanent protection of concrete barriers, bridge parapet rail, bridge piers and other hazards. It is simply installed with pins on a smooth surface in the same plane as the barrier on soil, asphalt or concrete (ADIEM does not require any jobsite forming or pouring of a concrete pad).

For temporary or construction zone applications, the system may be easily relocated as the work zone changes, and from project to project.

The energy absorption elements of the ADIEM are lightly reinforced, ultra low strength perlite concrete modules. The ADIEM dissipates the energy of an impact as the light-weight modules are crushed. Clean up and restoration of the system into full service are quick and easy. Simply replace the damaged modules and minor sweep up of debris.

The redirection element of the system is a heavily reinforced concrete, variable height curb with automobile hub-height tube rails.

  TL-3 TL-2
Length 9145 mm 5485 mm
Max. width 710 mm 710 mm
Height Varies (sloped base)
Design speed All NHS 75 km/h

ADIEM Base Repair Procedures

Tools required:

Normal concrete or masonry tools (trowels, brushes, forms, etc..) If needed specific tools can be listed, depending on severity of damage. A helpful hint: for most minor chips or damages try using Styrofoam forming which can be easily torn away after drying.

Material required:

Any standard highway concrete epoxy (10,000 psi or greater).
Dry cement (for aesthetics only, brand and strength not critical).
Clean cool water.
Sand

ADIEM base features
The ADIEM base unit has #6 reinforcing bars running longitudinally continuous from the front to the rear of the unit. The unit has #4 reinforcing bars running laterally placed every 6" on centers. The track in the center of the unit is made of 3/16" continuous material with 1/2" x 4" studs approximately every 6" on centers. There are redirecting bumpers on each side of the unit made of 3/16" material with 1/2" x 4" studs approximately every 6" on centers. The base is firmly held together with a concrete mixture of 4,500 psi or greater.

ADIEM base utility
The ADIEM base serves the purpose of providing a secure holding line for the energy absorbing ADIEM modules. The unit is designed with the intent of having performance features based on specific angles and dimensions being held constant. In repairing the unit it is important to realize that minor chips and cracks, though aesthetically displeasing, should not affect the performance of the system. If the damage is greater than 2" deep or 6" long, a Syro technical representative should be contacted for assistance.

ADIEM base repair
Use a brush to remove all loose material. Dampen area with sponge or cloth prior to application. If needed create a form to hold the mixture constant while drying occurs. Mix the highway concrete epoxy according to the directions given from the manufacturer. Apply mixture to damaged area and allow drying to occur per the manufacturers recommendations. Upon drying use a hammer or other rigid device to firmly strike the patched area, checking the are to be sure that proper bonding has occurred. After satisfactory testing is complete, mix the cement, sand, and water to create a "slurry," which can be applied with a brush and blend with existing concrete on the ADIEM base.

ADIEM Module Repair Procedures

Tools required
4" to 6" putty knife (to spread repair mixture)
Small 1 to 2 gallon bucket or pan (to mix repair mixture)
3 to 5 gallon bucket (to mix the finish coat)
Paint Roller (to apply the finish coat)

Material required
ADIEMcrete mixture
Perlite Granules
ADIEMcoat
Clean cool water

Surface preparation
Remove loose material.
Dampen area with sponge or cloth prior to application.

ADIEMcrete mixture

Mix approximately 1 pound of "ADIEMcrete" with approximately 6 ounces of clean cool water.
Mix thoroughly until "ADIEMcrete" mixture reaches a stiff paste consistency.

ADIEMcrete application
Using putty knife or similar tool pack the "ADIEMcrete" mixture the damaged area bringing the mixture to a smooth level finish with surrounding area. If the damage penetrates past the reinforcing cage or is no longer than six inches, a Syro technical representative should be contacted for assistance.  "ADIEMcrete" mixture will set in approximately 45 minutes.

ADIEMcoat application
Insure that the "ADIEMcrete" mixture has set prior to applying the "ADIEMcoat" finish.
Mix the Perlite granular material with the liquid "ADIEMcoat" until a semi-stiff consistency is achieved.
Using a paint roller apply the "ADIEMcoat" finish to the repaired area applying additional coats as necessary to match the texture of the surrounding area.

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