PRECAST LARGE UNIT CONCRETE PAVERS
SAND SET INSTALLATION GUIDE SPECIFICATIONS
PART 1 GENERAL
1.01WORK INCLUDED
A.Precast concrete pavers installed per the drawings as specified herein, including custom precast concrete amenities.
1.02RELATED WORK
A.Specified Elsewhere: (Modify as per the requirements of each project)
1.Section 02210 Grading
2.Section 02220 Excavation, Backfilling and Compaction
3.Section 02514 Concrete Paving, Walks, Curbs & Gutters
4.Section 03300 Cast-in-Place Concrete
5.Section 05500 Metal Fabrication
6.Section 07105 Membrane Waterproofing
7.Section 07920 Sealants
1.03QUALITY ASSURANCE
A.Manufacturing Qualifications:
1.All products covered under this Section shall be produced by a single manufacturer unless otherwise specified.
2. Manufacturer shall submit evidence of having not less than fifteen (15) years successful production of this product.
3. The paver manufacturer shall demonstrate, 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.
a. Satisfactory field performance is indicated when units similar in 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.
b. The units uses as the basis for proven field performance shall have been exposed to the same general type of environment, temperature range and traffic volume as is contemplated for the units supplied to the purchaser.
c.Pavers to be used in vehicular application must be 2 ¾” thick. Wausau Tile does not recommend paver to be over 12” in length for vehicular use.
B.Subcontractor Qualifications:
1. Subcontractor shall submit evidence of skill and not less than five (5) years specialized experience with this product.
C. Pre-Installation Conference: As directed by the Architect.
1.04REFERENCES
A.Titles, designations, dates of issue or revisions of reference standards shall be those in effect on the date of this Specification, unless otherwise specified herein.
1.05SUBMITTALS
A.Submit the following in accordance with the Supplementary General Conditions:
1.Manufacturer's Literature: Materials descriptive literature, installation instructions and paver color selection chart.
2.Test Reports: Three (3) copies, showing compliance with specified ASTM requirements.
3.Shop Drawings (Optional): (Provided by installing contractor)
a.Layout drawings of each paved area showing the pattern of pavers, indicate pavers requiring cutting, indicate setting bed methods in each area, drainage patterns and drains. Include details of setting beds, noting all materials and their thickness, show details at curbs and vertical surfaces.
b.Details of custom (nonstandard) curbs and stair tread/risers, include methods of installation.
4.Samples: Three (3) sample pavers of each manufactured type and color selected or specified. Pavers will be 12” x 12” size
1.06DELIVERY, STORAGE AND HANDLING
A. Deliver and handle precast concrete pavers in such a manner as to prevent damage. Units shall be stored above ground on blocking. Blocking shall be clean and nonstaining. All damaged or otherwise unsuitable material shall be immediately removed from the job site.
1.07MOCK-UP INSTALLATION
A.Prior to the start of precast concrete paver work construct mock-ups of each type of paver size and pattern area for the Owner and Architect to review. The mock-ups will be at the project site at a location mutually agreed to by the Owner and Contractor.
B.Construct the two (2) mock-up installations a minimum 8 foot x 8 foot area of typical precast concrete units and slabs with all setting beds, joints, edge and curb details as shown on the Drawings.
C.After review of the mock-ups, they would be retained and used as a standard of quality for the precast concrete paver work. At completion of the work remove the mock-up installations and related materials from the project site. If the mock-ups are incorporated in the actual construction, record their actual locations and sizes on the actual built record drawings
for the project.
1.08 PROJECT/SITE CONDITIONS
A. Environmental Requirements:
1. Do not install sand or pavers during heavy rain or snowfall.
2. Do not install sand and pavers over frozen base materials.
3. Do not install frozen sand or saturated sand.
4.Do not install concrete pavers on frozen or saturated sand.
1.09 MAINTENANCE
A. Extra Materials: Provide [Specify area] [Specify percentage.] additional material for use by owner for maintenance and repair.
B. Extra pavers shall be from the same production run as installed materials.
PART 2 PRODUCTS
2.01MATERIALS
A.Precast Concrete Pavers manufactured by Wausau Tile Company, specifically Type ______, color/style ______.
1.Portland Cement: ASTM Specifications C150
2.Aggregates: All aggregates used will be normal weight aggregate, conforming to ASTM Specifications C33.
3.Coloring: Coloring used shall conform to ASTM Standards where applicable.
4.Performance Requirements: based on 23 13/16” sq x 2” thick and standard mix design
a.Compression Strength: Each unit shall have an average compression strength of 8,000 psi with no individual unit less than 6,500 psi when tested in accordance with ASTM C140.
b.Water absorption: Shall not be greater than 6% according to ASTM C140.
c.Freeze/thaw: Durability of the paver shall meet the freeze/thaw tests in accordance with Section 8 of ASTM C1260. Specimens, when tested, shall have no breakage and not greater than 1% loss in dry weight of any individual unit when subject to 50 cycles of freeze/ thaw.
d.Center Load: Pavers shall support a minimum concentrated load of 1,850 lbs when pressure is applied to a paver supported on four (4) corners.
e.Sizing: Permissible variations in dimensions shall not differ by more than 1/16 inch from width, height, length or thickness. Standard units are manufactured with a 3/16 inch bevel on all four (4) sides of finished surface. Unit shall conform to a true plane and not differ by more than 1/16 inch in either concave and/or convex warpage.
5.Pavers to be used in vehicular application must be 2 ¾” thick. Wausau Tile does not recommend paver to be over 12” in length for vehicular use.
B. Manufacturer: All pavers shall be as specified herein and manufactured by Wausau Tile Inc
POBox 1520, Wausau, WI 54401, phone number 800-388-8728.
C.Sand Setting Bed Material: Sand shall common sand generally referred to as concrete sand and shall free of organic materials and any other contaminates that could potentially stain or otherwise damage the unit pavers.
D.Joint Filler Materials: Sand conforming with ASTM C 144 with 100 percent passing a No. 16 sieve.
E.Landscape Filter Fabric: Woven or non-woven non-biodegradable geotextile filter fabric between the compacted base and the sand leveling bed.
F.Preformed Asphalt Joint Filler where indicated on drawings: ASTM D 994, 1/2 inch thick, for expansion joints which are not sealed, one of the following:
1.Code 1301, W.R. Grace & Co.; I.
2.Asphalt Expansion Joint, W. R. Meadows, Inc.
3.Elastite Asphalt Expansion Joint, The Celotex Corporation.
G.Edge Restraint: Type as determined by the architect.
PART 3 EXECUTION
3.01INSPECTION
A.Examine all surfaces to receive the parts of the work specified herein. Verify all dimensions of in-place and subsequent construction. Notify the Contractor in writing of conditions detrimental to the proper and timely completion of the work. Do not proceed with the work until unsatisfactory conditions have been corrected. Installation of precast concrete pavers and associated construction constitutes acceptance of the adjacent and underlying construction.
3.02 INSTALLATION OF SAND SETTING BED (Follow current UCPI guidelines)
A.(Optional) Place a layer of the specified geotextile filter fabric uniformly on the surface of the properly prepared grade that is ready to receive the sand setting bed. Cover the designated area in its entirety.
B.Place solid steel ¾ or 1 inch thick control bars directly on the sand or geotextile filter fabric. Install shims under bars for minor adjustment of depth and finish paver elevations and slopes. Space bars approximately 7 feet apart and parallel to each other to serve as guides for strike-off boards. Spacing can very as determined by the size of the area and layout.
C.Place sand setting bed between control bars on the sand or geotextile filter fabric to not less than thickness of the designated control bars. Spread material and strike off by pulling the material with a 8 foot long x 2 inch x 6 inch wood board several times to produce a smooth firm and even setting bed. Add fresh material in low areas after each pass of the strike-off board. After each panel is complete remove and advance the first control bar to the next panel position in readiness for placing and striking adjacent panels. Fill in depressions left by the control bar and any shims.
3.03PAVER AND SLAB INSTALLATION
A.Install precast concrete pavers, slabs and curbs in locations, patterns and at elevations and with slopes for surface drainage as shown on the Drawings. Install precast concrete pavers, slabs and curbs in accordance with the manufacturer's printed installation instructions and the final reviewed shop drawings.
B.Lay out pavement in 30 foot working area modules. Set precast concrete pavers, slabs and curbs by hand , on sand setting bed in patterns shown on the drawings with hand tight joints 1/8 to 3/16 inch wide joints and uniform top surfaces.
C.Field cut precast concrete pavers in accordance with manufacturer's recommendations for methods, equipment and precautions.
D.Maintain accurate alignment and check for creep and shrinkage. Make adjustments to creep and shrinkage within the 30 foot module area.
E. Install edge restraints where required and as shown on the architectural drawings and details.
F.Sweep fine dry sand of a type and color approved by the architect over pavement surface to fill joints immediately after installing pavers, slabs and curbs on setting bed. Brush in sand until joints are completely filled, remove surplus sand. Do not allow traffic on installed pavers, slabs or curbing until the joints have been filled.
G.Protect newly laid pavers, slabs and curbs with plywood panels on which workers stand. Advance protective panels as work progresses but maintain protection in areas subject to continued movement of materials and equipment to avoid creating depressions or disrupting alignment of installed pavers, slabs and curbs.
H.Install the specified joint filler where precast concrete pavers, slabs and curbs abut curbs, other vertical surfaces and other construction.
I.Replace cracked or chipped precast concrete pavers, slabs and curbs at no additional cost to the Owner.
J.Final cleaning of pavers to remove all soiling from pavers for final acceptance.
CLEANING AND PROTECTION (Responsibility of end user)
A.Remove and replace pavers which are loose, chipped, broken, stained or otherwise damaged or ifunits do not match adjoining units as intended. Provide new units to match adjoining units and install in same manner as original units with same joint treatment to eliminate evidence of replacement
B. Cleaning: Remove mortar stains and all other types of soiling from exposed paver surfaces, wash and scrub clean.
CEfflorecense is a naturally occurring white residue or stain on the surface of new concrete. The residue can be cleaned or will dissipate naturally with time.
D.Provide final protection and maintain conditions in a manner acceptable to installer, which ensures paver work being without damage or deterioration at time of substantial completion.
3.05BACKFILLING
A.After the precast concrete paving is completed, backfill the spaces along the edges of the walks, metal edging and pavements to be required elevations with material reviewed by the architect. The Material shall then be compacted until firm and the surface neatly graded, with allowance made for top soil.
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