For tackifier, provide and use a natural polysaccharide-gum made from guar (Cyamopsis tetragonoloba) endosperm and combined with a mechanical or chemical cross-linking agent to resist rewetting. Ensure that the product:
806.8Burlap Bag Curbs
1 Provide and use burlap in accordance with AASHTO M 182, class 3, and consisting
of 10-ounce [285 g] or heavier material treated with copper napthenate or other approved agent to provide mildew-resistance. Provide in 40-inch [1015 mm] widths sewn to form a tube.
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Joint Materials
807.1Silicone Joint Sealant
Provide and use a nonsag or self-leveling, one-part silicone that is formulated specifically for sealing sawed joints in portland cement concrete pavement and in accordance with ASTM D 5893, except as noted in Table 807.1-1, Silicone Joint Sealant Requirements.
Total Ultimate Elongation Weathering (UV and ozone resistance) 5000 hours Tack Free Time
Specific Gravity
Bond to Concrete Mortar (1)
Table 807.1-1 Silicone Joint Sealant Requirements Limit
Test Method
800% min.
ASTM D 5893, section 6.9.1
No chalking, cracking, Or bond loss
ASTM C 793
20 to 75 minutes (nonsag) 180 minutes, max. (self-leveling) 1.01 to 1.515 (nonsag) 180 minutes, max. (self-leveling) 50 psi [345 kPa] min. (nonsage) 40 psi [275 kPa] min. (self-leveling)
ASTM C 679
ASTM D 792 (Method A) (1)(2)
Samples air cured 7 calendar days (nonsag) or 21 calendar days (self-leveling) from 74 ºF to 80 ºF [23 ºC to 27 ºC].
(2)
Briquettes molded in accordance with AASHTO T 132, sawed in half and bonded with approximately 10 mil [0.25 mm] of sealant and tested using clips meeting AASHTO T 132. Dry to a constant weight [mass] in an oven at a temperature from 200 ºF to 220 ºF [95 ºC to 105 ºC] and test in tension at a loading rate of 0.3 in/min [7.6 mm/min]. 2 Ensure that sealant is delivered in the manufacturer’s original, sealed container with the
original manufacturer’s label attached and intact. Ensure that the label is tamper-proof, nonremovable, and legibly marked with the manufacturer’s batch or lot number and the expiration date of the manufacturer’s shelf-life warranty. 3 Before approving sealant for use on department projects based on certification, the
department requires the sealant manufacturer to establish sealant performance of less than 1 percent failure, cohesive or adhesive, in one year, on in-place field applications. 4 Provide sealant with a shelf life of six months from the date of manufacture.
Do not use sealant that has exceeded the shelf life warranty expiration date; sealant may be retested in accordance with ASTM C 719 and recertified for six months from the retest
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Joint Materials