1203 - EMULSIFIED ASPHALT 1200 - 7
1203.1 Description
This specification covers emulsified asphalt used for asphalt mi xes, surface sealing, microsurfacing and tack coats.
1203.2 Requirements
a. General . Provide emulsified asphalt that is an intimate, homogenous mixture of base asphalt and emulsifying agent held suspended in water. Certain emulsified asphalt grades may contain petroleum distillates. The grade of material is designated in the Contract Documents. The KDOT reserves the right to change the grade and class as necessary due to aggregate type, road surface or weather conditions. Make the required change after being notified in writing by the KDOT. Provide emulsified asphalt that remains homogenous and stable during transportation, storage and distribution. Material that performs unsatisfactorily in any of the above situations will be rejected even if the material passes all laboratory tests. b. Chemical and Physical Requirements. Provide emulsified asphalt that complies with TABLES 1203- 1, 1203-2 and 1203-3. TABLE 1203-1: SPECIFICATIONS FOR ANIONIC EMULSIFIED ASPHALT RS-1H/ RS-1HP SS-1H MS-1 SS-1HP Min. Max. Min. Max. Min. Max. Min. Max. Viscosity, Saybolt Furol At 77°F, sec. . . . . . . . . . . . ----- ----- 10 100 ----- ----- 10 75 At 122°F, sec. . . . . . . . . . . . . 75 300 ----- ----- 100 400 ----- ----- Residue by Distillation, (% by Mass)……………… 65 ----- 57 ----- 65 ----- 57 ----- Oil Distillate, (% by Volume). . ----- ----- ----- ----- ----- 8 ----- ----- Storage Stability, %1 . . . . . . . . ----- 1 ----- 1 ----- 1 ----- ----- Demulsibility: 35 ml of 0.02 N CaCl2, %. . 60 ----- ----- ----- ----- ----- ----- ----- 50 ml of 0.1 N CaCl2, %. . . ----- ----- ----- ----- 75 ----- ----- ----- Sieve Test, % Retained. . . . . . ----- 0.50 ----- 0.50 ----- 0.50 ----- 0.1 Tests on Distillation Residue: Penetration, 77°F, 100g, 5 sec. 75 150 75 125 300 ----- 75 150 Solubility, %. . . . . . . . . . . . . . 97 .5 ----- 97.5 ----- 97.5 ----- ----- ----- Ductility, 77°F, mm. . . . . . . . . 800 ----- 800 ----- ----- ----- ----- ----- Ductility, 39°F, mm ----- ----- ----- ----- ----- ----- 100 350 Elastic Recovery @ 50°F, 20 cm elongation, % ----- ----- ----- ----- ----- 25 ----- 1 If the Contractor's storage tanks are equipped with a mechan ical propeller type agitation de vice, and the entire contents of the tank are thoroughly mixed before each day's use, th e requirement for satisfactory compliance with the storage stability test will be waived. 2 RS-1HP only 1203 - EMULSIFIED ASPHALT 1200 - 8 TABLE 1203-2: SPECIFICATIONS FOR CATIONIC EMULSIFIED ASPHALT CRS-1H/ CRS-1HP CSS-1H/ CSS-1HM CMS-1 CSS-Special Min. Max. Min. Max. Min. Max. Min. Max. Viscosity, Saybolt-Furol: At 77°F, sec. . . . . . . . . . . ----- ----- 10 60 ----- ----- ---- ---- At 122°F, sec. . . . . . . . . . 75 300 ----- ----- 100 400 ---- ---- Residue by Distillation, (% by Mass)………………… 65 ----- 57 ----- 65 ----- 64.01 66.01 Oil Distillate, (% by Volume). --- -- 3 ----- ----- ----- 8 ---- 0.5 Storage Stability, %. . . . . . . . ----- 1 ----- 1 ----- 1 ---- ---- Sieve Test, % Retained. . . . . . ----- 0.50 ----- 0.50 ----- 0.50 ---- 0.1 Tests on Distillation Residue: Penetration, 77ºF, 100g, 5 sec 75 150 50 100 300 ----- -25%2 +25%2 Solubility, %. . . . . . . . . . . . . 97 .5 ----- 97.5 ----- 97 .5 ----- ---- ---- Ductility, 77°F, mm. . . . 800 ----- 800 ----- ----- ----- ---- ---- Viscosity, Saybolt-Furol, 180°F, sec.. . . . . . . . . . ----- ----- ----- ----- 300 700 ---- ---- Elastic Recovery @50°F, 20 cm elongation, % ---- ---- ---- ---- ---- ---- ---- 1 Use modified AASHTO T 59 procedure – distillation temperature of 350°F with a 20 minute hold. 2Penetration will be determined by the producer and submitted to the Chief Chemist at the time of prequalification. 3 CRS-1HP only TABLE 1203-3: SPECIFICATIONS FOR EMULSION BONDING LIQUID EBL Tests on Emulsion: Min. Max. Viscosity, Saybolt-Furol @ 122ºF, sec 25 125 Storage Stability Test1, 24 h, % 1 Sieve Test2, % Retained 0.3 Residue by Distillation, % 63 Oil Distillate by Distillation, % 2 Demulsibility, % (35 ml, 0.02 N CaCl2) (Anionic Version) Demulsibility, % (35 ml, 0.8% Dioctyl Sulfosuccinate) (Cationic Version) 60 Tests on Distillation Residue: Min. Max. Penetration, 77ºF, 100g, 5 sec 90 150 Elastic Recovery3, % 60 1 After sitting undisturbed for 24 hours, the sample sh all show no more than 5 ml of the white latex residue. 2 The sieve test is waived if successful application of the material has been achieved in the field. 3 Elastic recovery, AASHTO T 301, 50ºF, 20 cm elongation, 5 minute hold, % min., run on Distillation Residue. c. Mixing Grade Emulsions . Formulate mixing emulsions (MS-1 and CMS-1) for use with regional aggregate types. In general, these will be crushed limest one and/or dolomite with sand for the eastern section of the state and sand-gravel with mineral filler for the central an d western sections. Formulate emulsions for use by both windrow and plant mixing methods and for either damp or dry aggregates. Provide an emulsion formulated for the intended end use if these conditions cannot be met by a single formulation. Provide an emulsion that enables material in a stockpile to easily be removed at temperatur es as low as 39ºF for an extended period of time after mixing. 1203 - EMULSIFIED ASPHALT 1200 - 9 d. Modified Emulsions, RS-1HP, CRS-1HP and CSS-1HM and CSS-Special
1.Provide anionic emulsified asphalt (RS-1HP) that complies with TABLE 1203-1 or cationic emulsified asphalt (CRS-1HP or CSS-1HM) that complies with TABLE 1203-2.
2.Provide a modified emulsion that contains a minimum of 3.0 percent polymer solids by weight of asphalt.
3.Provide a modified emulsion that shows no more than 5 ml of the white latex residue after sitting undisturbed for 24 hours.
4.For use in Microsurfacing. Formul ate the modified emulsified asphalt so that if the paving mixture is applied at a thickness of 1 inch, and the relative humidity is not more than 50 percent with the ambient air temperature at least 75ºF, it will cure sufficiently so rolling traffic can be allowed on the pavement in 1 hour with no damage to the surface. It must show no separation after mixing.
1203.3 Test Methods
a. Test in accordance with the applicable provisions of AASHTO T 44, T 49, T 51, and T 59. b. When testing modified emulsions, test the Elastic Recovery using AASHTO T 301. In addition, modify the distillation procedure of AASHTO T 59 as follows: “Slowly bring the temperature of the lower thermometer to 350 ± 9ºF and maintain for 20 minutes. Complete the distillation in 60 ± 15 minutes from the first application of heat.”
1203.4 Prequalification
Prequalify material under th is specification according to SECTION 1201.
1203.5 Basis of Acceptance
See applicable requirements under SECTION 1201.
Emulsified Asphalt in other states
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Source: Standard Specifications for State Road and Bridge Construction, 2015 Edition. Pages 710–712 of 978. View official source ↗