Project Installation Issue Specifications

Porous Concrete Pavers

Note: This specification guide is excerpted from Uni-Group USA's guide. This section is intended only to give an insight into items to include when developing a scope of work for a project.

Examination:

Verify subgrade preparation, compacted densities and elevations conform to specifications.
Note: Finished grade may be inch above final elevation after compaction. This is to allow for minor settling.
If geotextiles used, verify placement conforms to specifications and drawings.
Verify aggregate base materials, thickness compaction, surface tolerances and elevations conform to specifications.
Compaction should conform to ASTM D698 for pedestrian areas and residential driveways, ASTM D 1557 for heavy vehicular traffic.
Attention should be paid to stabilization of subgrade if upon weak or saturated solids.
Local aggregate base materials should conform to those used for highway flexible pavements or ASTM D2940.
Aggregate base should be spread in uniform layers not exceeding 6 inches in thickness and recommended base surface tolerance should be +/- 3/8 over a 10-ft straight edge.
If geotextiles used, base preparation, surface tolerances and elevations should conform to specifications
Mechanical tampers recommended for compaction of soil subgrade and aggregate base.

Installation:

Bedding sand: Do not use to fill in depressions in the base surface. Spread evenly over base course and screed to required thickness, typically a nominal 1 inch, not to exceed 1 inch thick).
Pavers are to be free of foreign materials before installation and installed in pattern per drawings, maintaining straight lines.
Joints between pavers to be per manufacturers design requirements (typically 1/16 to 3/16 inch wide but may need to be wider).
Fill gaps at edges of paved areas in accordance with manufacturers or designers requirements
Vibrate pavers, sweep dry joint sand into joints and vibrate until full repeat as necessary. Do not vibrate within 3-ft of the unrestrained edges.
Surface elevation of pavers shall be 1/8 to inch above adjacent drainage inlets, concrete collars or channels.

Field Quality Control:

After removal of excess sand, check final elevations for conformance to drawings.
Upon completion of work, remove any debris, surplus material, and equipment from site.

Return to Permeable Porous Concrete Pavers

Find a Concrete Contractor 24 Services in 221 Metros -- U.S. and Canada