1.1 Conformity--conform to the requirements of the general conditions of the contract.
1.2 Work Included
.1 Preparation of site
.2 Supply and place base course
.3 Supply and place sand leveling course
.4 Supply and install Paverlock interlocked concrete pavers, as manufactured on multi-layer equipment, in quality shape, thickness and color as specified. Consult Standard Specification for Paverlock Concrete Pavers.
2.1 Preparation--Special care should be taken in the preparatory steps to ensure best results. Load factors and soil conditions will determine the extent and depth of excavation.
2.2 Excavation--Unsuitable, unstable, or unconsolidated subgrade material shall be excavated to reach a solid sub-state. The soil engineer-architect-landscape architect-site supervisor shall inspect sub-state prior to compaction and addition of granular base.
.1 If edge restraint is to be used, the area under such restraint shall be excavated.
.2 Excavation should exceed the perimeter of the paved area by a minimum of 75 mm (3").
3.1 Interlocking Concrete Pavers
Pavers shall be: Landmark, Halfmark, Quartermark, Oxford, Oxford Tumbled, Oxford Circle, Cobble I, Cobble II, Halfmark, Concourse, Half Course, 6x12, Marquise, Tripaver or Eco-Tripaver with spacer ribs; and Turflock, as manufactured by Paverlock. Concourse and 6x12 shapes are not recommended for vehicular applications. Paver color shall be: blended shades Ottawa Creek I or II, Heritage Buff, Heritage Green, Harvest Blend, Sandstone, Granite, Montgomery Blend, Memphis Brown, Lakota Blend, Wexford Blend, Hampton Blend, Hampton Green; Concrete Gray, Charcoal Black, Eaton, Camel Buff, Chocolate Brown, Terra Cotta Red, Harvest, or custom color or shape with a thickness of 6 cm or 8 cm.
3.2 Base Course Aggregate
.1 The base course aggregate shall consist of sound, durable particles, free from clay, organic material or other deleterious matter and shall be 100% crushed with fines, graded within the following limits:
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Sieve Size |
% Passing |
3.3 Sand Laying Course
.1 The sand laying course shall consist of clean, coarse, concrete sand, not Mason sand, with the following gradation limits:
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Sieve Size |
% Passing |
3.4 Edge Restraint
.1 All edges of the Paverlock installation shall be restrained. The type of edge restraint shall be approved and locations noted on the plans.
.2 This edge restraint can be:
.1 Buildings
.2 Concrete curb or sidewalk
.3 PVC plastic edging
.4 Aluminum
.5 Steel
.6 Other suitable method of preventing movement of edge stones
.3 Edge restraint should be in place and secure before paver stones are compacted.
4.1 Construction of the Base Course
.1 The finished sub-grade shall be approved before placement of any base course.
.2 The base course shall be spread in layers which when compacted will not exceed 100 mm (4").
.3 The base course shall be compacted with suitable compaction equipment that will ensure a minimum 95% of ASTM Designation D1557.
.4 The base course shall be shaped to grade and cross section with an allowable local tolerance of 5 mm (1/4").
5. When installing 6 cm Paverlock, the compacted base shall be 85.73 mm (3 3/8") below final grade.
6. When installing 8 cm Paverlock, the compacted base shall be 104.75 mm (4 1/8") below final grade.
7. Compacted base should exceed perimeter of paved area by a minimum of 75 mm (3").
4.2 Construction of the Sand Laying Course
.1 The finished base course shall be approved before the placement of the sand laying course.
.2 The sand laying course shall be spread evenly over the area to be paved and screeded to a level that will produce the required 25 mm (1") thickness when the paving stones have been placed and vibrated.
.3 Once screeded and leveled, this sand laying course shall not be disturbed in any way.
.4 The sand laying course should exceed perimeter of paved area by a minimum of 75 mm (3").
4.3 Laying of Paverlock Concrete Pavers
.1 The Paverlock pavers shall be laid in such a manner that the desired pattern is maintained and the joints between the stones do not exceed 3 mm (1/8"). Pavers shall be pulled from multiple cubes whenever possible in a vertical column format.
.2 The gaps at the edge of the paved surface shall be filled with standard edge pieces or with Paverlock pavers cut to fit. The Paverlock pavers shall be cut to a straight even surface without cracks or chips.
.3 Appropriate edge restaint should be installed (see 3.4 edge restraints).
.4 The Paverlock pavers shall be vibrated to their final level by 2 or 3 passes of a vibrating plate compactor.
.5 After 1st vibration, sand containing at least 30%--3 mm (1/8") particles shall be brushed over the surface and vibrated into the joints with additional passes of the plate vibrator so as to completely fill in the joints.
.6 Surplus material shall then be swept from the surface and the entire site left clean.
.7 After final vibrating, the surface shall be true to grade and shall not vary by more than 5 mm (1/4") when tested with a 3 m (10') board at any location on the surface.
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