515 ALASKA 2020 SECTION 72 3
723-2.01 Materials.
1.Strip Tape. Use a waterproofing joint sealing system that complies with the requirements of Table 723- 1. TABLE 723 -1 WATERPROOFING STRIP TAPE REQUIREMENTS
2.Adhesive. Use a high- modulus, high- strength, str uctural, epoxy paste adhesive that meets the waterstop sealant system manufacturer’s recommendations.
3.Embedded Waterstop. For polyvinylchloride embedded waterproofing waterstop, meet the requirements of Table 723- 2. TABLE 723 -2 POLYVINYLCHLORIDE WA TERSTOP REQUIREMENTS For natural rubber embedded waterproofing waterstop, meet the requirements of Table 723- 3. TABLE 723 -3 NATURAL RUBBER WATER STOP REQUIREMENTS Property Test method Requirement Tensile strength ASTM D412 1,500 psi. min Ultimate elongation ASTM D412 500% min. Tear strength (maintained to -40 °F) ASTM D624, Die C 50 lb./in min. Peel Strength (7 days) ASTM D903 No loss of adhesion Property Test Method Requirement Water Absorption ASTM D570 0.15% max. Tear Resistance ASTM D624 225 lb./in. min. Ultimate elongation ASTM D638 300% min. Tensile strength ASTM D638 2000 psi min. Low temperature brittleness ASTM D746 No F ailure @ -35 °F Stiffness in flexure ASTM D747 700 psi min. Specific gravity ASTM D792 1.40 max. Hardness Shore A15 ASTM D2240 79 +/ - 3 Accelerated extraction Tensile strength Elongation Corp. of Engineers CRD -C- 1600 psi min. 300% min. Effect of Alkali Weight change Hardness change Corp. of Engineers CRD -C- Between +0.25% / - 0.10% +/- 5 points Property Test Method Requirement Water Absorption 2 days at 70° C (% change) ASTM D471 5% max. Hardness Shore A ASTM D2240 65 Tensile strength ASTM D412 3500 psi min. SECTION 72 3 516 ALASKA 2020 4. Obtain the Engineer’s approval to use waterstops of materials other than those specified. Tensile strength at 300% Modulus ASTM D412 1450 psi min. Ultimate elongation ASTM D412 500% min. Low Temperature Brittleness ASTM D746 Procedure B Grade 5 - Pass @ - 70.6 °F Compression set 22 hours at 70°C % original deflection ASTM D395 30% max. Accelerated aging 96 hours at 70°C % of tensile strength before aging ASTM D573 80% min. Accelerate d aging 96 hours at 70°C % of elongation before aging ASTM D573 80% min. Ozone resistance 7 days at 50 PPHM at 70 °C, 20% elongation ASTM D1149 No Crack 517 ALASKA 2020 SECTION 72 4 SEED
724-2.01 DESCRIPTION . Grass seed to provide a living vegetative cover.
724-2.02 MATERIALS. Provide seed mix as specified in the Special Provisions. Provide seed
collected or harvested within 2 years of the targeted seeding date. Provide all seed i n pure live seed (PLS) unless otherwise directed. Furnish seed true of genus and species. Meet applicable requirements of the State of Alaska Seed Regulations , 11 AAC 34, Article 1 and Article 4, and the Federal Seed Act, 7 CFR Part 201. The Engineer wi ll review requests for species or cultivar substitution(s); genus substitution is not allowed. Substitution requests need to be submitted a minimum of 60 calendar days in advance of purchase.
1.Prohibited and Restricted Noxious Weeds and Quarantined Pests. Furnish seed and appliances certified to be free of prohibited noxious weeds or quarantined pests, and certified to contain no more than the maximum allowable tolerances for restricted noxious weeds, according to Alaska Administrative Code, Title 11, Chapt er 34 (11 AAC 34).
a.Seed or appliances found to contain prohibited noxious weeds or quarantined pests will be rejected, according to 11 AAC 34.020(a) and 11 AAC 105- 180, respectively.
b.Seed or appliances found to contain restricted noxious weed seed in exces s of the maximum allowable tolerance per pound will be rejected, according to 11 AAC 34.020(b). Prohibited and restricted noxious weeds are listed in 11 AAC 34.020, and can be viewed at the following URL: http://plants.alaska.gov/invasives/noxious -weeds.htm .
2.Labeling. Ensure each bag or container of individual seed species is labeled to meet requirements of 11 AAC 34.010. Do not remove labels from bags or containers.
3.Certification. Certif y seed is free of prohibited noxious weeds and restricted noxious weeds are within allowable tolerances. Furnish to the Engineer a statement signed by the vendor identifying the lot number or lot numbers, certifying each lot of seed has been tested within the preceding nine months, by a recognized seed testing laboratory, a member of the Association of Official Seed Certifying Agency (AOSCA), or the Alaska Plant Materials Center. Seed will be rejected if:
a.Contains prohibited noxious weeds;
b.Contains restri cted noxious weeds above maximum allowable tolerances;
c.Not certified as tested within the preceding nine months;
d.Wet, moldy, or otherwise damaged in transit or storage; or
e.Containers do not have labels or the labels have been removed. Seed may be rejected for:
f.Discrepancies in the lot numbers listed on the statement to the lot numbers indicated on the labels of the seed containers.
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Source: Alaska Standard Specifications for Highway Construction, 2020 Edition. Pages 543–544 of 584. View official source ↗