1、Standard Practice for Micro Surfacing Design AASHTO Designation: PP 83-161Release: Group 3 (August 2016) American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-2a PP 83-1 AASHTO Standard Practice for Micro Surfacing Desig
2、n AASHTO Designation: PP 83-161Release: Group 3 (August 2016) 1. SCOPE 1.1. This standard practice for mix design evaluation uses mixture properties to determine the proportions of polymer-modified emulsified asphalt, mineral aggregate, water, mineral filler, and additives to produce a micro surfaci
3、ng job-mix formula. 1.2. The values stated in SI units are to be regarded as the standard. The inch-pound units are presented in parentheses for informational purposes and may not be exact equivalents. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: M 85, Portland Cement M 295, Coal Fly Ash and Raw o
4、r Calcined Natural Pozzolan for Use in Concrete M 303, Lime for Asphalt Mixtures M 316, Polymer-Modified Emulsified Asphalt MP 28, Materials for Micro Surfacing 2.2. ANSI Standard: NSF/ANSI 60-2013, Drinking Water Treatment Chemicals-Health Effects 2.3. ISSA Standards: ISSA TB 100, Test Method for W
5、et Track Abrasion of Slurry Surfacing Systems ISSA TB 109, Test Method for Measurement of Excess Asphalt in Bituminous Mixtures by Use of a Loaded Wheel Tester and Sand Adhesion ISSA TB 113, Test Method for Determining Mix Time for Slurry Surfacing Systems ISSA TB 114, Test Method for Wet Stripping
6、of Cured Slurry Surfacing Mixtures ISSA TB 139, Test Method to Determine Set and Cure Development of Slurry Surfacing Systems by Cohesion Tester ISSA TB 144, Test Method for Classification of Aggregate Filler-Bitumen Compatibility by Schulze-Breuer and Ruck Procedures ISSA TB 147, Test Method for Me
7、asurement of Stability and Resistance to Compaction, Vertical and Lateral Displacement of Multilayered Fine Aggregate Cold Mixes 3. SIGNIFICANCE AND USE 3.1. The procedure described in this standard practice is used to produce a micro surfacing job- mix formula. 2016 by the American Association of S
8、tate Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-2a PP 83-2 AASHTO 4. EVALUATION OF MATERIALS 4.1. Evaluate the aggregate in accordance with the requirements of MP 28. 4.2. Evaluate the emulsified asphalt in accordance with the requireme
9、nts for CQS-1P or CQS-1hP in M 316. 4.3. Evaluate the mineral filler in accordance with M 85 for cement, M 295 for fly ash, M 303 for lime and ANSI 60 for aluminum sulfate. 4.4. Water shall be free of harmful salts and contaminants. If the quality of the water is in question, it should be submitted
10、to the mix design laboratory for analysis along with the other raw materials to be used in the mix design. 5. DESIGN PROCESS 5.1. Evaluate mix formulations for system performance using the tests, methods and requirements outlined in Table 1. Table 1Evaluation of Micro Surfacing System Performance Te
11、st ISSA Technical Bulletin Requirement Mix Time 77F (25C) TB 113 Controllable to 120 s, min Wet Cohesion TB 139 30 minutes (Set) 12 kg-cm, min 60 minutes (Traffic) 20 kg-cm or Near Spin, min Wet Stripping TB 114 Pass (90% min) Wet-Track Abrasion Loss TB 100 1-h Soak 538 g/m2(50 g/ft2), max 6-day Soa
12、k 807 g/m2(75 g/ft2), max Lateral Displacement TB 147 5%, max Excess Asphalt by LWT Sand Adhesion TB 109 538 g/m2(50 g/ft2), max Saturated Abrasion Loss TB 144 1.0 g, max 6. DETERMINING MIX TIME 6.1. Determine mix time in accordance with ISSA TB 113 and the requirements of Table 1. Emulsified asphal
13、t percentages should result in mixture residual binder contents of 5.5 to 10.5 percent of mixture residual binder content. 7. DETERMINING SET AND CURE CHARACTERISTICS (TRAFFIC READINESS) 7.1. Determine initial set and cure development characteristics in accordance with ISSA TB 139 and the requiremen
14、ts of Table 1. 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-2a PP 83-3 AASHTO 8. DETERMINING BINDER CONTENT 8.1. The minimum binder content is determined in accordance with ISSA TB 100 and the req
15、uirements of Table 1. In general select 1 percent more emulsified asphalt (at 65 percent residue) from TB 100 with a tolerance of 0.5 percent emulsified asphalt during placement. 8.2. The maximum binder content is determined in accordance with ISSA TB 109 and TB 147 and the requirements of Table 1.
16、9. DETERMINING ASPHALT-TO-AGGREGATE COMPATIBILITY 9.1. Determine the compatibility between the asphalt and the aggregate fines in accordance with the abrasion section of ISSA TB 144 and the requirements of Table 1. 9.2. Evaluate the potential of the mixture for stripping in accordance to ISSA TB 114
17、 and the requirements of Table 1. 10. DETERMINING LATERAL DISPLACEMENT 10.1. Determine the displacement characteristics of multilayered systems in accordance with ISSA TB 147 and the requirements of Table 1. 11. REPORT 11.1. Report all test results from Sections 6 through 10. 11.2. Report the recomm
18、ended mix formulation including proportions of all mixture components and appropriate tolerances. 12. KEYWORDS 12.1. Aggregate; emulsified asphalt; micro surfacing. 13. REFERENCES 13.1. ASTM Standard: D6372, Standard Practice for Design, Testing, and Construction of Micro-Surfacing 13.2. ISSA Standard: ISSA A143, Recommended Performance Guideline for Micro Surfacing 1This provisional standard was first published in 2016. 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.
