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The work covered by this section consists of furnishing, installing, maintaining, removing and resetting, portable concrete barrier in accordance with the plans and specifications.
All materials shall meet the requirements of Division 10 shown below:
Portable Concrete Barrier Section 1090
(A) General:
The provisions of Article 11053 will be applicable to the work covered by this section.
All types of portable concrete barrier shall be placed as shown in the plans, or as directed by the Engineer. The barrier shall be anchored when required, by the method shown in the plans, or as directed by the Engineer.
Barrier units shall be lifted and placed using a two-point pick up, or other method acceptable to the Engineer, which will not over stress or damage the concrete. Connectors shall not be used for lifting purposes. Lifting devices or methods that will mar the surface of the concrete shall not be used.
Any barrier unit which has been cracked, damaged, chipped, or otherwise unfunctional Gshall not be used, as determined by the Engineer.
When the barrier is no longer required on the project, the Contractor shall remove the barrier.
(B) Anchoring Methods:
(1) General:
The Contractor shall submit to the Engineer for approval a description of the proposed anchoring method. The description shall include material specifications, manufacturer's recommendations for hole diameter, embedment depth and installation procedures, and any other materials, equipment or procedures. All anchoring methods shall be approved by the Engineer prior to being implemented.
(2) Anchor holes:
Anchor holes shall be drilled normal to the surface of installation using a pneumatic drill with a depth indicator, unless another drilling method is allowed by the Engineer. The diameter of the hole shall be in strict conformance with the plans or the manufacturer's recommendations. When directed by the Engineer, a jig or a fixture shall be provided by the Contractor and used to ensure correct positioning of the holes and proper alignment during the drilling process. Hole locations may be adjusted to avoid encountering reinforcing steel. Immediately after completion of drilling, all holes shall be blown free of all dust and debris with oil-free compressed air. The holes shall then be brushed with a stiff-bristled brush of a sufficient size to effectively remove dust from the sides of the hole, and blown free of all dust. This procedure shall be repeated until the hole is completely clean. Each hole shall be checked with a depth gauge to ensure proper embedment depth.
Concrete spalled or otherwise damaged by the Contractor's operations shall be repaired in a manner satisfactory to the Engineer.
Each hole shall be inspected by the Contractor immediately prior to placement of the adhesive and anchor. All holes shall be dry and free of dust, dirt, oil, and grease. Any hole found to deviate from these requirements shall be reworked to ensure an acceptable hole.
Once the barrier and anchors are removed, holes in the concrete shall be filled with an approved non-shrink, non-metallic, grout. These requirements may be waived if the bridge or roadway will no longer be used by traffic.
(3) Adhesives:
Adhesive shall be mixed in strict conformance with the manufacturer's instructions.
Anchors used with the adhesive bonding method shall be coated with a debonding agent so they can be easily removed. The debonding agent shall be formulated such that it does not reduce the strength of the anchor system.
The mixed adhesive shall be poured into the hole and the anchors inserted to the specified depth. The anchors shall be slightly agitated or rotated to ensure wetting and complete encapsulation. Adhesive shall completely fill the anchor hole, and any excess shall be removed flush with the pavement. Anchors shall not be disturbed while the adhesive is hardening.
(C) Resetting Barrier:
The scheduling of the work and the locations which the barrier units are to be reset shall be as shown in the plans or as directed by the engineer. The provisions of Subarticle 11703(A) shall apply to this work.
(D) Stockpiling:
When the barrier is not utilized on the project or it becomes necessary to stockpile units between placing two (2) separate installations, it shall be stockpiled at a location off the project that is provided by the Contractor, unless otherwise noted in the plans, or allowed by the Engineer to store the barrier within the project limits. The Contractor shall provide the stockpile area at no cost to the Department.
All maintenance shall meet the requirements of Article 11054.
The quantity of portable concrete barrier to be paid for will be the actual number of linear feet which has been furnished, installed, maintained and removed and accepted. Measurement will be made by counting the number of barrier units used and multiplying by the length of a unit.
The quantity of resetting portable concrete barrier to be paid for will be the number of linear feet of barrier that has been moved from one location on the project to another location on the project. Measurement will be made by counting the number of barrier units moved during any one move and multiplying by the length of a unit. Where barrier units are moved more than once, each move will be measured separately. Whenever the Engineer directs the Contractor to move barrier units from an installed location to a stockpile either on or off the project and then back to another installed location, the complete move from the first installed location to the next installed location will be measured as 2 moves.
The quantity of portable concrete barrier, measured as provided in Article 11705, will be paid for at the contract unit price per linear foot for "Portable Concrete Barrier".
The quantity of portable concrete barrier (anchored), measured as provided in Article 11705, will be paid for at the contract unit price per linear foot for "Portable Concrete Barrier (Anchored)".
The quantity of portable concrete barrier (drainage), measured as provided in Article 11705, will be paid for at the contract unit price per linear foot for "Portable Concrete Barrier (Drainage)".
The quantity of resetting portable concrete barrier, measured as provided in Article 11705, will be paid for at the contract unit price per linear foot for "Reset Portable Concrete Barrier".
The quantity of resetting portable concrete barrier (anchored), measured as provided above, will be paid for at the contract unit price per linear foot for "Reset Portable Concrete Barrier (Anchored)". Where the plans or the Engineer require the anchored barrier to be removed from one location on the project and reset at another location on the project where the barrier will not require re-anchoring at the new location, payment will be made under "Reset Portable Concrete Barrier" as covered above.
The above prices and payments will be full compensation for all work covered by this specification including but not limited to furnishing, installing, maintaining, resetting and removing portable concrete barrier.
Payment will be made under:
Portable Concrete Barrier Linear Foot
Portable Concrete Barrier (Anchored) Linear Foot
Portable Concrete Barrier (Drainage) Linear Foot
Reset Portable Concrete Barrier Linear Foot
Reset Portable Concrete Barrier (Anchored) Linear Foot