1、Standard Specification for Polymer-Modified Emulsified Asphalt AASHTO Designation: M 316-18 Technical Section: 2a, Emulsified Asphalts Release: Group 3 (August) American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-2a M
2、316-1 AASHTO Standard Specification for Polymer-Modified Emulsified Asphalt AASHTO Designation: M 316-18 Technical Section: 2a, Emulsified Asphalts Release: Group 3 (August) 1. SCOPE 1.1. This specification covers 11 grades of polymer-modified cationic and anionic emulsified asphalt for use in pavem
3、ent construction in the manner designated. The modifier may be either a solid or a latex polymer. The modifier may be added either to the asphalt binder or emulsifier solution prior to the emulsification process. Note 1See M 140 for specifications covering emulsified asphalt other than cationic and
4、M 208 for specifications covering cationic emulsified asphalt. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: M 140, Emulsified Asphalt M 208, Cationic Emulsified Asphalt R 5, Selection and Use of Emulsified Asphalts R 66, Sampling Asphalt Materials R 77, Certifying Suppliers of Emulsified Asphalt T
5、 49, Penetration of Bituminous Materials T 50, Float Test for Bituminous Materials T 53, Softening Point of Bitumen (Ring-and-Ball Apparatus) T 59, Emulsified Asphalts T 111, Mineral Matter or Ash in Asphalt Materials T 301, Elastic Recovery Test of Asphalt Materials by Means of a Ductilometer T 382
6、, Determining the Viscosity of Emulsified Asphalt by a Rotational Paddle Viscometer 3. REQUIREMENTS 3.1. Upon receipt, refer to T 59 for the proper protocol for conditioning the emulsified asphalt prior to mixing and testing. The emulsified asphalt should appear to be homogeneous after thorough mixi
7、ng. Complete testing of sample for emulsified asphalt properties within 14 days of the sample date. Complete testing for emulsified asphalt residue properties within 30 days of the sample date. Note 2Dilution of the emulsified asphalt to aid in the field application of the material should not occur
8、without approval of the buyer. 3.1.1. If the emulsified asphalt appears to be inhomogeneous after reconditioning and mixing according to T 59, discard and resample for testing if required by the buyer. 2018 by the American Association of State Highway and Transportation Officials. All rights reserve
9、d. Duplication is a violation of applicable law.TS-2a M 316-2 AASHTO 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 emulsified
10、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. 3.1.2. If the sample was subjected to freezethaw cyclin
11、g prior to receipt, discard and resample for testing. If the emulsified asphalt was frozen at any time before testing, results for emulsified asphalt liquid properties such as viscosity, sieve, and settlement will be invalid. Note 4Emulsified asphalt residue properties can also be affected when the
12、liquid emulsified asphalt to be recovered shows signs of inhomogeneity or has been subjected to freezethaw cycling. Note 5If the emulsified asphalt appears inhomogeneous or is suspected of having been subjected to freezethaw cycling prior to testing and a second, representative sample cannot be obta
13、ined, actual emulsified asphalt performance at time of construction should be reviewed. If sample integrity issues persist, consider 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 tes
14、t temperature. 3.2. Emulsified asphalt shall conform to the requirements in Tables 1, 2, or 3 for the type and grade specified. 3.3. By certification of compliance, the minimum polymer solids by percent mass of residual asphalt content shall be 2.5 percent for Table 1 grades and 3.0 percent for Tabl
15、e 2 grades. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-2a M 316-3 AASHTO Table 1Requirements for Polymer-Modified Emulsified Asphalt Typically Used for Chip Seal ApplicationsaType Rapid-Setting
16、Medium-Setting Grade CRS-2hP CRS-2P CRS-2sP CHFRS-2P HFRS-2P HFMS-2P Min Max Min Max Min Max Min Max Min Max Min Max Tests on emulsified asphalt: Viscosity, Saybolt Furol at 50C (122F), sb,c100 400 100 400 100 400 100 400 75 400 100 450 Or Viscosity, Rotational Paddle at 50C (122F), mPasb,c200 800 2
17、00 800 200 800 200 800 150 800 200 900 Storage stability test, 24 h, %b,c1 1 1 1 1 1 Demulsibility: 35 mL, 0.8% Sodium dioctyl sulfosuccinate, %b 40 40 40 40 35 mL, 0.02 N CaCl2, %b50 50 mL, 0.10 N CaCl2, %b40 Particle charge test Positive Positive Positive Positive Sieve test, %b,c0.10 0.10 0.10 0.
18、10 0.10 0.10 Distillation: Oil distillate, by volume of emulsified asphalt, % 3 3 Residue, %d65 65 65 65 65 65 Tests on residue from distillation: ePenetration, 25C (77F), 100 g, 5 s, 0.1 mm 40 90 90 150 150 250 100 175 100 200 100 200 Elastic Recovery, 25C (77F), Straight Sided, 50 60 60 60 60 60 5
19、 cm/min, 20 cm elongation, 5 min hold, %fFloat test, 60C (140F), s 1800 1200 1200 Ash content, % 1 1 1 1 1 1 aRefer to R 5 for typical applications. b This test requirement and associated specification limits are waived for emulsified asphalt products following dilution. c This test requirement on r
20、epresentative samples may be waived if successful applications of the material has been achieved in the field. d For emulsions that are diluted, the percent residue requirements must be adjusted accordingly. e For information on residue from evaporation, see Section 5.1.2.f Elastic Recovery at 10C (
21、50F) may be used as an alternate, if approved by the owner. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-2a M 316-4 AASHTO Table 2Requirements for Polymer-Modified Emulsified Asphalt Typically Use
22、d for MicroSurfacingaType Quick-Setting Grade CQS-1hP CQS-1P Min Max Min Max Tests on emulsified asphalt: Viscosity, Saybolt Furol at 25C (77F), sb,c20 100 20 100 Or Viscosity, Rotational Paddle at 25C (77F), mPasb,c40 200 40 200 Particle charge testbPositive Positive Sieve test, %b,c0.10 0.10 Disti
23、llation: Residue, %d62 62 Tests on residue from distillation: ePenetration, 25C (77F), 100 g, 5 s, 0.1 mm 40 90 90 200 Elastic Recovery, 10C (50F), Straight Sided, 50 60 5 cm/min, 20 cm elongation, 5 min hold, % Softening point, F 135 128 Ash content, % 1 1 aRefer to R 5 for typical applications. b
24、This test requirement and associated specification limits are waived for emulsified asphalt products following dilution.c This test requirement on representative samples may be waived if successful applications of the material has been achieved in the field. d For emulsified asphalts that are dilute
25、d, the percent residue requirements must be adjusted accordingly.e For information on residue from evaporation, see Section 5.1.2. Table 3Requirements for Polymer-Modified Emulsified Asphalt Typically Used for Tack Coat ApplicationsaType Rapid-Setting Slow-Setting Grade CRS-1PbSS-1hP CSS-1hP Min Max
26、 Min Max Min Max Tests on emulsified asphalt: Viscosity, Saybolt Furol at 25C (77F), sc,d20 100 20 100 20 100 Or Viscosity, Rotational Paddle at 25C (77F), mPasc,d40 200 40 200 40 200 Storage stability test, 24 h, %c,d1 1 1 Particle charge testcPositive Positive Sieve test, %c,d0.10 0.10 0.10 Cement
27、 mixing test, %c2.0 2.0 Demulsibility: 35 mL, 0.8% Sodium dioctyl sulfosuccinate, %c40 Residue, %e63 57 57 Tests on residue from distillation: fPenetration, 25C (77F), 100 g, 5 s, 0.1 mm 90 150 40 90 40 90 Elastic Recovery, 10C (50F), Straight Sided, 60 25 25 5 cm/min, 20 cm elongation, 5 min hold,
28、% Ash content, % 1 1 1 aRefer to R 5 for typical applications. b This grade is for spray paver applications. c This test requirement and associated specification limits are waived for emulsified asphalt products following dilution. d This test requirement on representative samples may be waived if s
29、uccessful application of the material has been achieved in the field. e For emulsified asphalts that are diluted, the percent residue requirements must be adjusted accordingly. f For information on residue from evaporation, see Section 5.1.2. 2018 by the American Association of State Highway and Tra
30、nsportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-2a M 316-5 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
31、 tested. 5. METHODS OF TEST 5.1. Determine the properties of the emulsified asphalts given in Tables 1, 2, and 3 in accordance with T 59. Determine the emulsified asphalt viscosity as given in Tables 1, 2, and 3 in accordance with the Rotational Paddle method in T 382 or by the Saybolt Furol method
32、in T 59, as appropriate. Determine the properties of the emulsified asphalt residue in accordance with T 49, T 50, T 53, T 111, or T 301, as appropriate. Note 6The distillation testing temperature is typically lower for polymer-modified emulsified asphalts than M 140 or M 208 emulsified asphalts (se
33、e T 59). 5.1.1. Residue by DistillationThe material from some polymer-asphalt systems may not be smooth after residue recovery. If this occurs, stir the material well to homogenize the residue as much as possible per T 59, and continue with testing the required residual properties. 5.1.2. Residue by
34、 EvaporationThis method may be used as an alternate to distillation to prepare the emulsified asphalt residue for testing in accordance with T 59, if approved by the owner. Properties of the residue from the evaporation procedure may also differ from the specifications shown, if approved by the owne
35、r. The same method to prepare the residue (either evaporation or distillation) must be used when comparing test results from the residue. 6. KEYWORDS 6.1. Cationic; emulsified asphalt; latex polymer; polymer-modified anionic emulsified asphalt; polymer-modified cationic emulsified asphalt. 2018 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.
