SECTION 705 - JOINT MATERIAL 7-18
705.01 Preformed Expansion Joint Filler Preformed expansion j oint filler shall be
non-extruding and resilient bituminous type and shall conform to the requirements of AASHTO M 213.
705.02 Joint Mortar Joint mortar shall consist of 1 part Port land cement, 2 parts
sand and sufficient water to obtain the required consistency. Mortar shall be used within 30 minutes after its preparation. The cement shall conform to the requirements of Portland cemen t AASHTO M 85, Type II or IIA. The sand shall meet the requirements of the following table: Sieve Designation Percentage by Weight Passing Square Mesh Sieves Joints Thicker Than ½ inch Joints ½ inch or Thinner ⅜ inch 100 - ¼ inch - 100 No. 4 95-100 - No. 8 70-95 85-100 No. 16 45-80 60-90 No. 30 25-55 35-70 No. 50 10-30 15-45 No. 100 2-10 0-15 No. 200 0-5.0 0-5.0 When necessary, material retained on the No. 4 sieve may be removed. The sand shall be subjected to the colorimetric test for organ ic impurities, AASHTO T 21, and when a color darker than the reference standard color solution (laboratory designation Plate III) is produced, the material shall be rejected.
705.03 Flexible Watertight Gaskets Flexible gaskets, either r ubber or plastic, shall
conform to ASTM C990.
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