- 854 - SECTION 1032 -- EMULSIFI ED ASPHALT (CATIONIC)
1032.01 Description
1.Emulsified asphalt (cationic) shall conform to the requirements below. All test methods are AASHTO methods unless otherwise noted. All AASHTO Testing Standards are as per the 2015 Edition.
1032.02 Material Characteristics
1.Emulsified asphalt (cationic) samples shall comply with test requirements when tested after being stor ed at room temperature of 73 +/- 4oF (23 +/- 20C) for a period of up to 14 days after sampling.
2.CMS-1 shall comply with the test requirements in Table 1032.01. Table 1032.01 Tests on emulsion: Specification Viscosity, Saybolt Furol, T 59, 50oC (122oF), sec. 50 – 500 Settlement, percent, maximum (note 1) 5 Storage Stability, percen t, maximum (note 1) 1.0 Sieve Test, percent Retained, maximum (note 1) 0.5 Residue by Distillation, percent, minimum 65 Oil Distillate, percent, maximum 12 Tests on distillation residue: Penetration, dmm., minimum 300 Solubility in Trichloroethylene, percent, minimum 97.0 Viscosity, Saybolt Furol, 82oC (180oF), sec. (note 2) 200 - 600 Note 1: See note “b” of AASHTO M 208 Note 2: Kinematic to Saybolt Furol conversion as per ASTM D2161.
3.CSS-1 shall meet the s pecifications of AASHTO M 208.
4.CSS-1H shall meet the s pecifications of AASHTO M 208.
5.CRS-2 shall meet the s pecifications of AASHTO M 208.
6.CRS-2P shall meet the specific ations of AASHTO M 316 with the following changes. Table 1032.02 Test Specification Penetration, dmm. 100-150 Ductility, 25oC (77°F), cm., minimum 40 Elastic Recovery, percent, minimum 55 Storage Stability, perc ent See note “b” of AASHTO M 208 Sieve Test, percent See note “b” of AASHTO M 208 Force Ratio Test Not Required Emulsified Asphalt (Cationic) 1032.02 - 855 - a. Evaporation residue: Distill ation will be used for residue percentage determination and all resid ue testing. The distillation will be taken to 350± 5°F, and held for 20 minutes and otherwise in accordance with AASHTO T 59.
b.Paragraph 3.1 of AASHTO M 316 is void and superseded by the following: 3.1 CRS-2P - A cationic emulsion made with base asphalt binder modified with styrene-butadiene or styrene-butadiene styrene block copolymers. All base stock asphalt used must be modified before emulsification. CRS-2P shall contain no latex polymer.
7.CRS-2L shall meet the specifications of AASHTO M 316 with the following changes: Table 1032.03 Test Specification Penetration, dmm 65 - 130 Ductility, 25°C (77°F), cm., minimum 40 Softening Point, °F, minimum 130 Storage Stability, perc ent See note “b” of AASHTO M 208 Sieve Test, percent See note “b” of AASHTO M 208
a.Evaporation residue: Distill ation will be used for residue percentage determination and all resid ue testing. The distillation will be taken to 350± 5°F, and held for 20 minutes and otherwise in accordance with AASHTO T 59.
b.Paragraph 3.2 of AASHTO M 316 is void and superseded by the following: 3.2 CRS-2L - A catonic emulsion made with base asphalt binder modified with styrene-butadiene rubber latex or polychloroprene latex. All base stock asphalt used must be modified during a co- milling emulsification process exclusively, and through the use of the latex polymers listed above only.
c.The test of Solubility in trichloroethylene of the residue is waived, but as stated in AASHTO M 316, the Solubility of the base asphalt binder shall be greater than 99.0%.
1032.02 Emulsified Asphalt (Cationic)
- 856 - 8. CRS-2VHL shall meet the following specifications: Table 1032.04 Tests on emulsion: Specification Viscosity, Saybolt Furol, T 59, 50oC (122oF), sec. 75 – 300 Residue by Distillation, percent, minimum (note 1) 65 Oil Distillate, percent, maximum 3 Storage Stability, percen t, maximum (note 2) 1.0 Demulsibility, percent, minimum 40 Sieve Test, percent Retained, maximum (note 2) 0.10 Particle Charge Positive Tests on distillation residue: Penetration, dmm. 65 – 130 Ductility, 25°C (77oF), cm., minimum 40 Softening Point, oF, minimum 135 Note 1: The distillation shall be taken to 350 +/- 5oF, and held for 20 minutes, and otherwise in accordance with AASHTO T 59. Note 2: Test requirement is waived if successful application of the material has been achieved in the field.
a.The solubility of the base aspha lt binder shall be greater than 99.0%.
b.All polymer shall be added as either styrene-butadiene rubber latex or polychloroprene latex only, and only during a co-milling emulsification process. The latex pol ymer solids content shall be 3.0% minimum by weight of the base asphalt binder.
9.CQS-1H polymer-modified for Microsurfacing shall meet the following specifications:
a.The emulsion for use in this work shall conform to the specifications of CQS-1H in AASHTO M 208 except as otherwise noted in Table 1032.05. Table 1032.05 Tests on emulsion: Specification Storage Stability, percent, maximum 1.0 Settlement, 24 hours, percent, maximum 1.0 Residue, percent, minimum (note 1) 62 Tests on residue: Softening Point, oF, minimum 135 Solubility in trichloroethylene, percent Waived Note 1: The distillation shall be taken to 350 +/- 5oF, and held for 20 minutes, and otherwise in accordance with AASHTO T 59.
b.The polymer material shall be milled or blended into the asphalt or emulsifier solution prior to the emulsification process. The polymer solids content shall be a minimum of 3. 0% by weight of the base asphalt binder. Emulsified Asphalt (Cationic) 1032.03 - 857 - 1032.03 -- Acceptance Requirements
1.Emulsified asphalt (cationic) will be accepted as described in the Department’s Materials Sampling Guide . - 858 - SECTION 1033 -- AGGREGATES
1033.01 Description
1.Mineral aggregates shall be crushed rock, broken stone, gravel, sand-gravel, coarse sand, fine sand, or a mixture of these materials composed of clean, hard, durable, and uncoated particles. Crushed rock shall be crushed limestone, dolomite, granite, quartzit e, or other ledge rock approved for the intended purpose by the Department’s Materials and Research Engineer.
2.This combined aggregate gradation using Class R aggregate is to optimize aggregate blends utilizing mo re locally available materials.
a.Achieving a uniform gradation for Class R may require the use of two or more different aggregates. It is the responsibility of the contractor to meet additional material characteristics requirements; such as, but not limited to particle shape, cubicity, angularity, etc., when designing a mix.
1033.02 Material Characteristics
1.Sampling and Testing Procedures:
a.All materials shall be sampled and tested in accordance with Table 1033.01. All material source locations and quarries must be approved by the Department prior to use. Table 1033.01 Sampling and Testing Procedures Procedure Method Sampling NDOT T 2 Sieve Analysis NDOT T 27 Clay Lumps, Shale, and Soft Particles NDOT T 504 Abrasion AASHTO T 96 Freeze and Thaw Soundness NDOT T 103 Specific Gravity and Absorption (course aggregate) AASHTO T 85 Specific Gravity and Absorption (fine aggregate) AASHTO T 84 Total Evaporable Moisture Content of Aggregates by Drying AASHTO T 255 Plastic Fines in Graded Aggregates and Soils by Use of the Sand Equivalent Test AASHTO T 176 Sodium Sulfate Soundness AASHTO T 104 Calcium Carbonate NDOT C 25 Organic Impurities AASHTO T 21 Mortar-Making Properties= AASHTO T 71 Reducing Field Samples of Aggregate to Testing Size Lightweight Pieces in Aggregates AASHTO T 248 NDOT T 113
2.General Aggregate Properties:
a.Aggregates shall be free from injurious quantities of dust, soft or flaky particles, loams, alkali, organic matter, paper, wood, or other deleterious matter as determined by the Engineer.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 888–891 of 1,048.