(Patching of Small Areas)
1. GENERAL
The work included is the removal of the existing paving brick by hand; cleaning the brick stacking and storing the brick in a secure area; removing and replacing deteriorated concrete base and/or subbase; placing a minimum 1/2 inch thick bedding course; laying the brick; rolling the brick; applying the filler; and cleanup.
2. PAVING BRICK
The paving brick shall be recovered from the street to be reconstructed and shall be whole brick with minimum chipped edges.
Extra paving brick if needed to complete the reconstruction shall be equal to or as close as possible in size, color and hardness to the original brick.
3. BEDDING COURSE
Upon the prepared base, which shall be thoroughly cleaned, shall be spread a cement-sand bed to a depth required, minimum 3/4". Bed shall be composed of one (1) part Portland Cement and 5 parts sand.
The cement and sand shall be thoroughly machine mixed in the proportions specified until it is of uniform color throughout. It shall be dry when mixed and shall be kept dry until brick are placed, inspected and rolled. If necessary to use damp sand in order that the work shall not be unreasonably delayed, then only so much sand and cement shall be mixed and spread as can be covered with brick, inspected and rolled within one hour of the commencement of the operation.
The bed shall be shaped and molded to a true surface parallel to the finished pavement.
4. BRICK REMOVAL
The paving bricks shall be removed from the street by and carefully cleaned of all mortar, cement, tar, direct, etc. and stacked. The bricks shall be cleaned long before they are to be relayed. The bricks shall not be tossed in piles or onto other hard surfaces to minimizethe breakage and chipping. The bricks shall be stored in a secure area until reused to prevent others from stealing them; the contractor is responsible for replacing any bricks missing or stolen.
5. LAYING OF BRICKS
The bricks shall be laid in straight rows surrounding existing brick surface and on the bedding course. The longitudinal joint between the existing brick surface and the new brick surface shall be constructed with full bricks, interlocking and in the same pattern as the existing pattern. A string line shall be used when laying the brick to establish line and grade.
The crown, grade and slope shall frequently be checked with a 10 foot long straightedge with no greater variation in the surface than 1/4 inch. Any low or high spots greater than 01:111 shall be corrected by removing the brick and removing or adding bituminous mastic.
Each day after the bricks have been laid and the rows straightened the chips and spells shall be swept from the surface to prevent them from entering the joints between the brick. All defective brick shall be replaced with good brick.
6. ROLLING THE BRICK
The bricks shall be rolled with a power driven vibratory plate wacker roller. Rolling shall be done longitudinally on boards not less than 10 inches wide and 12 feet long with a uniform thickness of 3/4 inch laid longitudinally and in close contact or plywood in 4 foot by 8 foot sheets 3/4" thick.
7. CLEANUP
All excess materials, filler, brick, etc. shall be removed from the site. Contractor shall deliver any excess bricks to a location, as designated by the owner.
8. BASE REPLACEMENT
GENERAL. After the removal of the existing brick surface, the city shall inspect the concrete base. If any unstable areas are found or the existing base elevation requires adjustment, the existing material shall be removed by the contractor in its entirety to a depth of 12 inches below top of existing base and disposed of. The sub-base shall be four (4) inches of 2A aggregate (mechanically tamped). The base shall be replaced with eight (8) inches of compacted BCBC.
(Res. 46-10. Passed 6-17-10.)