1、Standard Specification for Cationic Emulsified Asphalt AASHTO Designation: M 208-16 Release: Group 3 (August 2016) American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001TS-2a M 208-1 AASHTO Standard Specification for Cationi
2、c Emulsified Asphalt AASHTO Designation: M 208-16 Release: Group 3 (August 2016) 1. SCOPE1.1. This specification covers 12 grades of cationic emulsified asphalt for use in pavement constructionin the manner designated.Note 1See M 140 for specifications covering emulsified asphalt other than cationic
3、 and M 316for specifications covering polymer-modified emulsified asphalt.1.2. The values stated in SI units are to be regarded as the standard.2. REFERENCED DOCUMENTS2.1. AASHTO Standards: M 140, Emulsified Asphalt M 316, Polymer-Modified Emulsified Asphalt R 5, Selection and Use of Emulsified Asph
4、alts R 66, Sampling Asphalt Materials R 77, Certifying Suppliers of Emulsified Asphalt T 49, Penetration of Bituminous Materials T 51, Ductility of Asphalt Materials T 59, Emulsified Asphalts T 111, Mineral Matter or Ash in Asphalt Materials3.3.1. 3.1.1. REQUIREMENTSUpon receipt, refer to T 59 for t
5、he proper protocol for conditioning the emulsified asphalt prior to mixing and testing. The emulsified asphalt should appear to be homogeneous after thorough mixing. Complete testing of sample for emulsified asphalt properties within 14 days of the sample date. Complete testing for emulsified asphal
6、t residue properties within 30 days of the emulsified asphalt sample date.Note 2Dilution of the emulsified asphalt to aid in the field application of the material should not occur without approval of the buyer.If the emulsified asphalt appears to be inhomogeneous after reconditioning and mixing acco
7、rding to T 59, discard and resample for testing if required by the buyer.Note 3When emulsified asphalts (in particular, rapid-setting grades) are held in containers at ambient temperature for an extended period, emulsified asphalt droplets can coalesce, leading to unrepresentative changes in emulsif
8、ied asphalt liquid properties. Coalescence can also lead to sieve development and, ultimately, destabilization of the emulsified asphalt. This can be noted as overall inhomogeneity of the sample even after careful reheating and mixing upon receipt. 2016 by the American Association of State Highway a
9、nd Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-2a M 208-2 AASHTO 3.1.2. If the sample was subject to freeze-thaw cycling prior to receipt, discard and resample for testing. If the emulsified asphalt was frozen at any time before testing, results for
10、 emulsified asphalt liquid properties such as viscosity, sieve, and settlement will be invalid. Note 4Emulsified asphalt residue properties can also be affected when the liquid emulsified asphalt to be recovered shows signs of inhomogeneity or has been subjected to freeze-thaw cycling. Note 5If the
11、emulsified asphalt appears inhomogeneous or is suspected of having been subjected to freeze-thaw cycling prior to testing and a second, representative sample cannot be obtained, actual emulsified asphalt performance at time of construction should be reviewed. If sample integrity issues persist, cons
12、ider deploying R 77, so that liquid emulsified asphalt samples are taken directly from heated storage tanks and are evaluated soon after cooling directly to the required test temperature. 3.2. Emulsified asphalt shall conform to the requirements in Table 1 for the type and grade specified. 2016 by t
13、he American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.Table 1Requirements and Typical Applications for Cationic Emulsified Asphalta Type Rapid-Setting Grade CRS-1h CRS-1 CRS-1s CRS-2h CRS-2 CRS-2s Min Max Min Max Min
14、Max Min Max Min Max Min Max Tests on emulsified asphalt: Viscosity, Saybolt Furol at 50C (122F), sb20 100 20 100 20 100 100 400 100 400 100 400 Storage stability test, 24 h, %b ,c1.0 1.0 1.0 1.0 1.0 1.0 Demulsibility, 35 mL, 0.08% Sodium dioctyl sulfosu, cinate, %b40 40 40 40 40 40 Particle charge t
15、estbPositive Positive Positive Positive Positive Positive Sieve test, %b, c0.10 0.10 0.10 0.10 0.10 0.10 Distillation: Oil distillation, by volume of emulsified asphalt, % 3 3 3 3 3 3 Residue, %d60 60 60 65 65 65 Tests on residue from distillation: Penetration, 25C (77F), 100 g, 5 s, 0.1 mm 40 90 90
16、 150 150 250 40 90 90 150 150 250 Ductility, 25C (77F), 5 cm/min, cm 40 40 40 40 40 40 Ash content, % 1 1 1 1 1 1 aRefer to R 5 for typical applications. bThe test requirement and associated specification limits are waived for emulsified asphalt products following dilution. cThis test requirement on
17、 representative samples may be waived if successful application of the material has been achieved in the field. d For emulsified asphalts that are diluted, the percent residue requirements must be adjusted accordingly. Continued on next page. TS-2aM 208-3AASHTO 2016 by the American Association of St
18、ate Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.Table 1Requirements for Cationic Emulsified Asphalta(Continued) Type Quick-Setting Medium-Setting Slow-Setting Grade CQS-1h CQS-1 CMS-2h CMS-2 CSS-1h CSS-1 Min Max Min Max Min Max Min Max Min
19、Max Min Max Tests on emulsified asphalt: Viscosity, Saybolt Furol at 25C (77F), sb20 100 20 100 20 100 20 100 Viscosity, Saybolt Furol at 50C (122F), sb50 450 50 450 Storage stability test, 24 h, %b ,c1.0 1.0 1.0 1.0 Particle charge testbPositive Positive Positive Positive Positive Positive Sieve te
20、st, %b, c0.10 0.10 0.10 0.10 0.10 0.10 Cement mixing test, % 2.0 2.0 Distillation: Oil distillation, by volume of emulsified asphalt, % 12 12 Residue, %d62 62 65 65 57 57 Tests on residue from distillation: Penetration, 25C (77F), 100 g, 5 s, 0.1 mm 40 90 90 250 40 90 90 250 40 90 90 250 Ductility,
21、25C (77F), 5 cm/min, cm 40 40 40 40 40 40 Ash content, % 1 1 1 1 1 1 aRefer to R 5 for typical applications. bThe test requirement and associated specification limits are waived for emulsified asphalt products following dilution. cThis test requirement on representative samples may be waived if succ
22、essful application of the material has been achieved in the field. d For emulsified asphalts that are diluted, the percent residue requirements must be adjusted accordingly. TS-2aM 208-4AASHTO 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplic
23、ation is a violation of applicable law.TS-2a M 208-5 AASHTO 4. SAMPLING 4.1. Take samples of emulsified asphalt in accordance with R 66. 4.2. Store samples in clean, airtight sealed plastic containers at a temperature of not less than 4C (39F) until tested. 5. METHODS OF TEST 5.1. Determine the prop
24、erties of the emulsified asphalts given in Table 1 in accordance with T 59. Determine the properties of the emulsified asphalt residue in accordance with T 49, T 51, or T 111 as appropriate. 6. KEYWORDS 6.1. Cationic emulsified asphalt; emulsified asphalt; quick-setting; rapid-setting; slow-setting. 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.
