Laserfiche WebLink
I <br />Pl�' <br />I <br />I <br />N <br />Ensure the joint sand meets the grading requirements of ASTM C 144 <br />Standard Specification for Aggregate for Masonry Mortar. <br />Bedding sand may be used for joint sand. Do not use joint sand for bedding <br />sand. <br />526 -2.5 Bedding and Joint Grouts: A suitable grout, in thickness specified by the <br />manufacturer and approved for use by the Architectural Paver manufacturer, may be <br />substituted for either bedding sand, joint sand or both when specified in the plans and <br />approved by the Engineer. <br />526 -3 Construction Methods. <br />526 -3.1 General: <br />526 -3.1.1 Submittals: Prior to beginning placement, furnish to the Engineer, <br />for approval, full size samples of architectural pavers to indicate type, pattern, shape and <br />color. Also submit a certified sieve analysis for gradation of the bedding sand and joint <br />sand. <br />526 -3.1.2 Mock -ups: Prior to beginning placement, install a 6 by 6 foot [2 <br />by 2 meter] paver area following these specifications. This area will be used to determine <br />surcharge of the bedding material layer, joint sizes, lines, laying patterns and colors of the <br />job. This area will be adjacent to an edge treatment, incorporated into the work, and will <br />be the standard from which the work will be judged. <br />526 -3.1.3 Environmental Conditions: Cover stockpiled materials with <br />waterproof covering to prevent exposure to rainfall. Do not install bedding materials or <br />architectural pavers during heavy rains or over wet substrata. <br />526 -3.2 Installation: Install the architectural pavers in the following manner: <br />A. Spread the bedding material evenly over the base course and screed to <br />plan thickness, not to exceed a thickness of 1 1/2 inch [40 mm] . Do not disturb the <br />screeded bedding material. Ensure placement of sufficient bedding material to stay ahead <br />of the laid architectural pavers. Do not use the bedding material to fill depressions in the <br />base course. <br />B. Lay architectural pavers in the pattern(s) shown in the plans and maintain <br />straight pattern lines. <br />C. Joints between the architectural pavers, on average, will be between <br />1/16 to 3/16 inch [2 to 5 mm] wide. <br />D. Fill gaps at the edges of the paved area with cut or edge architectural <br />pavers. <br />E. When utilizing bedding and joint sand: <br />1 . Use a low amplitude vibrator capable of 5,000 foot - pounds [22 kN] <br />with 7 -100 Hz frequencies to vibrate and compact architectural pavers into bedding sand. <br />2. Vibrate the architectural pavers, sweeping dry joint sand into the <br />joints and vibrating, until the joints are full. Do not vibrate within 3 feet [1 m] of the <br />unrestrained edges of the architectural pavers. <br />3. At the end of each day, all work within 3 feet [1 m] of laying face <br />must be left fully compacted, with sand - filled joints. <br />4. Sweep off the excess sand. <br />F. Leave a final surface elevation of architectural pavers of 1/8 to 1/4 inch <br />[3 mm to 6 mm] above adjacent drainage inlets, concrete collars or channels. <br />March 2007 01000 -119 03- 4122.D <br />