1. Concrete pavers, with ungrouted joints, over sand base. a. Large precast sections in random mix with smaller concrete pavers

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1 SECTION PART 1 - GENERAL 1.01 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specifications Sections, apply to this Section SECTION INCLUDES A. Exterior Pavers; New Plaza. 1. Concrete pavers, with ungrouted joints, over sand base. a. Large precast sections in random mix with smaller concrete pavers 1.03 RELATED SECTIONS A. Related Sections include: 1. Section Joint Sealers; vehicle and pedestrian sealants. 2. Section Earthwork; subgrade preparation. 3. Section Asphalt concrete paving SUBMITTALS A. Product Data: Submit specifications and other data for each type of material required, including certification that each type complies with specified requirements. Include instructions for handling, storage, installation and protection of each type. B. Colors and Textures: Provide color and texture samples. Architects selection shall be made from full range of available colors, at no additional cost to Owner. C. Samples: Submit sets of samples not less than 4 inch (100mm) x 8 inch (203mm) in size of each different color, grade and finish of each product. Include in each set full range of exposed color and texture to be expected in completed work. 1. Submit samples for both large sections and smaller pavers. D. Shop Drawings: Submit shop drawings showing sizes, dimensions, sections and profiles of materials, arrangement and provisions for jointing, and other necessary details QUALITY ASSURANCE A. Installer Qualifications: A firm specializing in work with not less than three years of experience in installing products similar to those required for this project with a record of successful ( )

2 service and a written statement from the manufacturer approving the firm as an installer of their product. B. Manufacturer Qualifications: A firm with a minimum of three years experience in manufacturing and supplying the product to be installed. The firm to manufacture a product which meets all trade association and regulatory requirements pertaining to the product being manufactured. C. Single Source Responsibility: Obtain products from a single manufacturer or source for a complete installation of product specified. D. Regulatory Requirements: 1. Concrete Pavers: National Concrete Masonry Association, NCMA. E. Mock-Up: Prior to installation of paving and surfacing, fabricate sample panel using materials,large and small pieces, pattern and joint treatment indicated for project work, including special features for expansion joints and contiguous work. Build panel at the site, as directed, of full thickness and approximately 8 ft. (2.8m) x 8 ft. (2.8m), unless otherwise indicated. Provide range of color, texture and workmanship to be expected in the completed work. Obtain Architect's acceptance of visual qualities of the panel before start of paving work. Retain panel during construction as a standard for judging. Panel may be incorporated into the work, upon approval of the Architect DELIVERY, STORAGE, AND HANDLING A. Protect all materials during storage and construction against moisture, soiling, staining and physical damage PROJECT/SITE CONDITIONS A. Installer must review installation procedures and coordination with other work with Contractor and other contractors and subcontractors whose work will be effected by this work. B. Weather Limitations: Protect paving work against freezing when atmospheric temperature is 40 degrees F. (4 degrees C) and falling. Heat materials and provide temporary protection of completed portions of masonry work. Comply with requirements of BIA Technical Notes, No. 1A, "Cold Weather Masonry Construction - Construction and Protection Recommendations." C. Hot Weather Requirements: Protect paving work in hot weather to prevent excessive evaporation of setting beds and grout. Provide artificial shade, wind breaks and use cooled materials, as required ( )

3 PART 2 - PRODUCTS 2.01 CONCRETE PAVERS A. Manufacturers 1. Omni-Stone 2. Uni-Group USA; Pavestone Co. 4. Hanover Architectural Products Inc; B. Physical Requirements 1. At the time of delivery to the work site, interlocking concrete paving stones shall conform to the following physical requirements. a. Minimum compressive strength 8,500 psi, maximum absorption of 5 percent when sampled and tested in accordance with ASTM C140. b. Freeze Thaw Requirements: When tested in accordance with section 8 of ASTM C67, specimens shall have no breakage and not greater than 1 percent loss in dry weight of any individual unit when subjected to 50 cycles of freezing and thawing. c. Dimensional Variation: Length, width, and height of specimens shall not differ by more than 1/8 inch (3mm) from approved samples. C. Materials 1. Cement - Shall conform to ASTM C-150 Portland cement type II. 2. Aggregates - Shall conform to ASTM C-33, for concrete aggregates. D. Unit Size: Random sizing in a pattern determined by the Architect, from larger sizes starting at 2 inches thick by 2 by 2 feet varying in size down to 2 inches (50mm) thick x 4 inches (100mm) x 4 inches (100mm), E. Patterns: Random pattern as developed by Architect UNGROUTED MORTARLESS SETTING MATERIALS FOR CONCRETE PAVERS A. Subbase Material (Porous Fill): Crushed stone or gravel, well graded from 3/8 inch (9mm) to 1 inch (25mm), with sufficient fines to choke the porous fill. Minimum compacted thickness shall be 4 inches, unless otherwise noted on drawings. 1. Subbase shall be true to grade with vertical variation within 1/2 inch (12mm) in 10 feet (3m) ( )

4 B. Soil Separator (Geotextile Fabric): Fabrics manufactured for soil stabilization and filter fabric. 1. Manufacturers: a. Phillips Fibers Corporation (412) b. Exxon Chemical Company c. Webtec, Inc. 2. Fabric: Non-woven fabric consisting of long chain polymeric filaments or yarns such as polyethylene, polyamide, polyvinyledene-chloride, polypropylene, or polyester formed into a stable network so that the filaments or yarns retain their relative position to each other. a. Soil Stabilization: Minimum ounces (128g - 170g) per square yard. C. Leveling Course (Stone Screenings): Fine aggregate (sand) complying with ASTM C 33. Graded with 100 percent passing the 3/8 inch (9mm) sieve and 95 percent passing the No. 4 sieve. Minimum compacted thickness of 1 inch (25mm) unless otherwise noted on drawings. D. Sand for Joints: ASTM C 144 except use aggregate graded with 100 percent passing the No. 8 sieve and 95 percent, the No. 16 sieve. E. Soil Sterilizer: Herbicide treatment; apply chemical weed control agent in strict compliance with manufacturer's recommended dosages and application instructions. Apply to compacted, dry subgrade. PART 3 - EXECUTION 3.01 UNGROUTED MORTARLESS PAVER APPLICATIONS A. Compact soil subgrade uniformly to at least 95 percent of ASTM D 1557 laboratory density. B. Place graded aggregate for subbase material over compacted subgrade. Provide compacted thickness of base indicated. compact subbase to at least 100 percent of ASTM D 1557 maximum laboratory density. C. Install geotextile fabric layer over subbase material. Overlap edges minimum 12 inches (300mm). D. Place sand leveling bed. Compact by tamping or wetting and screed to depth indicated or required to allow for setting of brick pavers. E. Treat leveling base with soil sterilizer to prohibit growth of grass and weeds ( )

5 F. Set pavers in pattern indicated, placing as closely together as possible. Sweep fine sand over surface to fill joint irregularities. G. String lines shall be used to insure that the paving stones will be set true to line and grade. H. Care shall be taken to insure that the pavement properly coincides and aligns with adjacent work lines and elevations. I. The paving stones shall be placed "hand tight" and level on the loose base or leveling course. J. The leveling course shall not be disturbed or individual stones shall not be precompacted. K. A minimum of three passes of a plate vibrator (minimum compaction force of 2,500 pounds (1134kg) for 2-3/8 inch (60mm) stones, and 5,000 pounds (2258kg) for stones 3 inch (75mm) and thicker) shall be made to set the paving stone in the leveling course. L. Voids and joints are to be filled by sweeping and vibrating in sand equal in gradation to the sand in the base or leveling course or slightly finer (100 percent passing the No. 16 sieve and 10 percent passing No. 200 sieve). M. Sweeping and vibration should be alternately continued until all joints are full. Note: At this point fully loaded vehicles may use the pavement, provided that none pass nearer than one (1) yard (.9144m) from an unrestrained edge. N. Pavement shall be swept clean and excess sand removed. O. Edge Cutting: Where whole paving stone units do not fit at the edges of the pavement, paving stones shall be cut to fit neatly against the edge restraint. Spaces left around manholes, drainage inlets, tree wells, and other structures included within the pavement shall be filled with cut stone in the same manner. 1. Cutting shall be done with either a hydraulic block splitter or a masonry saw so as to leave a clean edge to the traffic surfaces REPAIR, POINTING, CLEANING, AND PROTECTION A. Remove and replace unit pavers that are loose, chipped, broken, stained, or otherwise damaged or if units 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 ( )

6 B. Provide final protection and maintain conditions in a manner acceptable to installer, which ensures unit paver work being without damage or deterioration at time of Substantial Completion. END OF SECTION ( )