SPECIFICATION INFORMATION

STANDARD SPECIFICATIONS FOR PAVERLOCK CONCRETE PAVERS

1.0 GENERAL

1.1 Conformity--conform to the requirements of the general conditions of the Contract

1.2 Work Included

.1 Supply and place base course
.2 Supply and place sand laying course
.3 Supply and install interlocked concrete pavers in quality, shape, thickness and color as specified
.4 Supply and install all accessory items as required by the contract

2.0 MATERIALS

2.1 Interlocking Concrete Pavers

Pavers shall be: Landmark, Halfmark, Quartermark, Oxford, Oxford Tumbled, Ocford Circle, Cobble I, Cobble II, 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 vehicluar applications and do not conform to C936.  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, Carcoal Black, Eaton, Camel Buff, Chocolate Brown, Terra Cotta Red, Harvest or custom color or shape with a thickness of 6 cm or 8 cm.

2.1.1 Cementious Materials--Materials shall conform to the following applicable ASTM Specifications:

.1 Portland Cements--Specification C150
.2 Blended Cements--Specification C595
.3 Hydrated Lime, Type S--Specification C207
.4 Pozzolans--Specification C618

2.1.2 Aggregates shall conform to the following ASTM Specifications, except that grading requirements shall not necessarily apply:

.1 Normal Weight--Specification C33, for Concrete Aggregates
.2 Lightweight--Specification C331, for Lightweight Aggregates for Concrete Masonry Units

2.1.3 Other Constituents--Air-entraining agents, coloring pigments, integral water repellents, finely ground silica, etc., shall be previously established as suitable for use in concrete and either shall conform to ASTM Standards where applicable, or shall be shown by test or experience not to be detrimental to the concrete.

2.1.4 Physical Requirements

.1 Compressive Strength--At the time of delivery to the work site, the average compressive strength shall be not less than 8,500 PSI with no individual unit less than 7,500 PSI.
.2 Absorption--The average absorption shall not be greater than 5%, with no individual unit greater than 7%.
.3 Durability--The manufacturer shall satisfy the purchaser either by proven field performance or the laboratory freeze-thaw test that the paving units have adequate durability if they are to be subjected to a freeze-thaw environment.
.3.1 Proven Field Performance--Satisfactory field performance is indicated when units similar composition, and made with the same manufacturing process as those to be supplied to the purchaser, do not exhibit objectionable deterioration after at least 3 years. The units used as the basis for proven field performance shall have been exposed to the same general type environment, temperature range, and traffic volume as is contemplated for the units supplied to the purchaser.
.3.2 Freeze-Thaw Test--When tested in accordance with Section 8 of ASTM C 67-73, Specimens shall have no breakage and not greater than 1.0 percent loss in dry weight of any individual unit when subjected to 50 cycles of freezing and thawing. This test shall be conducted not more than 12 months prior to delivery of units.
.3.3 Abrasion Resistance--When tested in accordance with ASTM C 418-76, "Abrasion Resistance of Concrete by Sandblasting," Specimens shall not have greater volume loss than 15 cubic centimeters per 50 square centimeters. The average thickness loss shall not exceed 3 millimeters.

2.1.5 Permissible Variations in Dimensions

.1 Length or width of units shall not differ by more than 1.5 mm (1/16") from approved samples. Heights of units shall not differ by more than 3 mm (1/8") from the specified standard dimension.

2.1.6 Visual Inspection

.1 All units shall be sound and free of defects that would interfere with the proper placing of unit or impair the strength or permanence of the construction. Minor cracks incidental to the usual methods of manufacture, or resulting from customary methods of handing in shipment and delivery, shall not be deemed grounds for rejection.

2.1.7 Sampling and Testing

.1 The purchaser or his authorized representative shall be accorded proper facilities to inspect and sample the units at the place of manufacture from the lots ready for delivery.
.2 Sample and test units in accordance with ASTM Methods C140, Sampling and Testing Concrete Masonry Units, except as required in Section 3.3.

2.1.8 Rejection

.1 In case the shipment fails to conform to the specified requirements, the manufacturer may sort it, and new specimens shall be selected by the purchaser from the retained lot and tested at the expense of the manufacturer. In case the second set of specimens fails to conform to the test requirements, the entire lot shall be rejected.

2.1.9 Expense of Tests

.1 Except as specified in Section 8, and unless otherwise agreed, the expense of inspection and testing shall be borne by the purchaser.

2.2 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:

2.3 Sand Laying Course

.1 The sand laying course shall consist of clean coarse concrete sand, not mason sand, with the following gradation limits:

2.4 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

3.0 EXECUTION

3.1 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.

3.2 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 Paverlock pavers have been placed and vibrated.
.3 Once screeded and leveled this sand laying course shall not be disturbed in any way.

3.3 Laying of Paverlock Concrete Pavers

.1 The Paverlock 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 cut to fit. The Paverlock pavers shall be cut to a straight even surface without cracks or chips.
.3 Appropriate edge restraint should be installed (see 2.4 edge restaints).
.4 The Paverlock shall be vibrated to their final level by 2 or 3 passes of a vibrating plate compactor (with neoprene pad if possible).
.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.

DIAGRAM I

DIAGRAM II

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