Rev. Date 6-15
1 of 1
ITEM #0925101A RELAY BRICK WALK
Description:
Work under this item shall consist of removing and reconstructing brick walk which has been disturbed by excavation at the locations shown on the plans or as directed by the Engineer in conformance with these specifications.
Materials:
Gravel for base shall conform to Article M.02.01 for gravel fill. Leveling base material shall be concrete sand conforming to ASTMC-33 for fine aggregates or No. 10 as shown in AASHTO M 43-54 (1974) as specified in table II.
Construction Methods:
Existing bricks shall be carefully removed. If any bricks are broken during removal, the Contractor shall be responsible for replacing them. Upon reconstruction of the brick walk, all soft and yielding material and other portions of the subbase which will not readily compact shall be removed and replaced with suitable materials. The surface of the subbase shall be compacted with mechanical equipment capable of delivering a ground pressure of not less than 300 pounds per linear inch (54 kilograms per linear centimeter) of contact width. The amount of compaction shall be as specified by the Engineer but in no case shall that amount be less than four complete passes of the compacting equipment. The dry density after compaction shall conform to Article 2.02.03-6 of the standard specifications, Form 816. After compaction, the subbase shall be trued to the required line and grade. No additional payment will be made for any materials which are required to bring the subbase to the lines, grade and cross-sections of the site. The Contractor shall protect the subbase from damage by exercising such precautions as the Engineer deems necessary. The subbase surface shall be maintained in such condition as to permit proper drainage. It shall be checked and approved prior to placement of the leveling base. The leveling base shall be screeded loose to a thickness of approximately 2” (50mm). The leveling shall be treated with a soil sterilizer, of a type to be approved by the Engineer, prior to the placement of the bricks. The exact thickness of the leveling base is to be determined at the job site.
Care shall be taken by the Contractor to insure the screeded leveling base is loose and undisturbed placement. Bricks are to be installed “Hand-tight” with care being taken not to disturb the leveling bed. Mason string lines shall be used to insure proper lines and grades. Bricks are to be vibrated into the leveling base with a vibratory plate capable of achieving a 3500 to 5000 pounds (1590 to 2268 kilograms) compaction force. Such vibratory compaction shall be accomplished on all bricks prior to the end of operations on each working day. Compaction of the bricks shall continue until finish grade, as directed by the Engineer, is achieved. All joints shall be filled after final compaction with the same material used for the leveling base.
Method of Measurement:
This work will be measured for payment by the actual number of square feet (square meters) of complete and accepted relayed brick walk.
Basis of Payment:
This work will be paid for at the contract unit price per square foot (square meter) for "Relay Brick Walk" complete and accepted in place which price shall include removing, storing and reconstruction of Brick Walk and all material, labor, equipment and work incidental thereto.
Pay Item Pay Unit
Relay Brick Walk s.f. (m)
ITEM #0925101A