AASHTO PP 87-20 pdf free download

AASHTO PP 87-20 pdf free download.Slurry Seal Design.
1. SCOPE 1.1. This standard practice for mix design evaluation uses mixture properties to determine the proportions of emulsified asphalt, mineral aggregate, water, mineral filler, and additives to produce a slurry seal job-mix formula. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: ■M 17, Mineral Filler for Bituminous Paving Mixtures ■M 85, Portland Cement ■M 208, Cationic Emulsified Asphalt ■M 295, Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete ■M 303, Lime for Asphalt Mixtures ■MP 32, Materials for Slurry Seal 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 106, Measurement of Slurry Seal Consistency ■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 ■ISSATB 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 3. SIGNIFICANCE AND USE 3.1. The procedure described in this standard practice is used to evaluate a slurry seal job-mix formula.4. EVALUATION OF MATERIALS 4.1. Evaluate the aggregate in accordance with MP 32. 4.2. Evaluate the emulsified asphalt in accordance with the requirements for CQS-1h in M 208. 4.3. Evaluate the mineral filler in accordance with M 17 for bituminous mineral filler, 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 1.6. DETERMINING MIX TIME 6.1. Determine the mix time in accordance with ISSA TB 113 and the requirements of Table 1. Emulsified asphalt percentages should result in mixture residual binder contents of5.5 to 13.5 percent. 7. DETERMINING SLURRY SEAL CONSISTENCY 7.1. Determine the mixture consistency in accordance with ISSA TB 106 and the requirements of Table 1. 8. DETERMINING SET AND CURE CHARACTERISTICS (TRAFFIC READINESS) 8.1. Determine the initial set and cure development characteristics in accordance with ISSA TB 139 and the requirements of Table 1.9. DETERMINING BINDER CONTENT 9.1. The minimum binder content is determined by excessive mixture loss in accordance with ISSA . TB 100 and the requirements of Table 1. In general, select 1 percent more emulsified asphalt (at 62 percent residue) from minimum emulsified asphalt content determined from TB 100. 9.2. The maximum binder content is determined in accordance with ISSA TB 109 and the requirements of Table 1. 10. DETERMINING ASPHALT-TO-AGGREGATE COMPATIBILITY 10.1. Evaluate the potential of the mixture for stripping in accordance with the reported test results of ISSA TB 114 and the requirements of Table 1. 11. REPORT 11.1. Report all test results from Sections4, 6, 7, 8, 9, and 10. 11.2. Report the recommended mix formulation including proportions of all mixture components. 12. KEYWORDS 12.1. Emulsified asphalt; mineral filler; slurry seal .AASHTO PP 87-20 pdf download.