AASHTO PP 83-16 pdf free download
AASHTO PP 83-16 pdf free download.Microsurfacing Design.
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 microsurfacing 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. AA SHTO Standards:
• M 85, Portland Cement
• M 295, Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
• M 303, Lime for Asphalt Mixtures
• M 316, Polymer-Modified Emulsified Asphalt
• MP 28, Materials for Microsurfacing
2.2. ANSI Standard:
• NSF/ANSI 60-2013, Drinking Water Treatment Chemicals-Health Effects
2.3. ISSA Standards:
• ISSA TB 100, Test Method for Wet 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 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 Measurement 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 microsurfacing job-mix formula.
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 requirements for CQS- 1 P or CQS-l hP 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 NSF/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 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 I.
6. DETERMINING MIX TIME
6.1. Determine mix time in accordance with ISSA TB 113 and the requirements of Table 1. Emulsified asphalt 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 requirements of Table 1.
8. DETERMINING BINDER CONTENT
8.1. The minimum binder content is determined in accordance with ISSA TB 100 and the requirements of Table I. 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.
9. DETERMP’JING 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 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 I.AASHTO PP 83-16 pdf download.
