FIELD MANUAL For HOT MIX ASPHALT (HMA) - Mississippi ...

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CHAPTER 1 GENERAL 1.1 Purpose - The purpose of this manual is to establish uniform procedures and practices for quality control and quality assurance sampling and testing of hot mix asphalt (HMA). This manual provides instructions and procedures for Contractor and MDOT personnel for the design, control and acceptance of asphalt mixtures under MDOT’s Quality Management Program (QMP) as required by the specifications. Sampling procedures, sampling frequencies, and testing to be performed by the Contractor for the quality control of asphalt mixtures at the asphalt plant and by MDOT for the quality assurance and acceptability of these mixtures are detailed. When necessary for clarification, examples are provided. For ready reference, the specifications, standard operating procedures, and example forms for documentation of test results are provided in appendices to this manual. 1.2 Terminology AASHTO - American Association of State Highway and Transportation Officials. ASTM - American Society of Testing Materials. BRCF - Bulk Specific Gravity (G mb ) Reheat Calibration Factor CAT-I - Certified Asphalt Technician-Level I. Contractor or MDOT personnel who have successfully completed the MDOT HMA Technician Certification Program for Level I certification. This certification level is required for performance of sampling and testing of HMA mixtures and component materials. CAT-II - Certified Asphalt Technician-Level II. Contractor or MDOT personnel who have successfully completed the MDOT HMA Technician Certification Program for Level I and Level II. This certification level is required for Contractor personnel who interpret HMA test results and make necessary plant adjustments such that the HMA mixture produced conforms to the job mix formula. CMDT - Certified Mixture Design Technician. Contractor or MDOT personnel who have successfully completed the MDOT HMA Technician Certification Program for the design of HMA mixtures. This certification level is required for designing or approving the design of HMA mixtures. All personnel at this level must have first completed requirements and obtained CAT-I and CAT-II certification levels. Rev. February 5, 2007 6
FHWA - Federal Highway Administration HMA - Hot Mix Asphalt HT - High Type Asphalt Mixtures JMF - Job Mix Formula MDOT - Mississippi Department of Transportation MRCF - Maximum Specific Gravity (Gmm) Reheat Correction Factor MT-## - Mississippi Test Methods (e.g., MT-78) MT - Medium Type Asphalt Mixtures NCAT - National Center of Asphalt Technology QA - Quality Assurance QC - Quality Control QMP - Quality Management Program RAP - Recycled Asphalt Pavement ST - Standard Type Asphalt Mixtures SUPERPAVE - Superior Performing Asphalt Pavement TSR - Tensile Strength Ratio VFA - Voids Filled With Asphalt VMA - Voids In Mineral Aggregate 1.3 Definitions Coarse Aggregate - Material retained on the No. 8 sieve. Check aggregate specific gravity test procedures for sample requirements. Fine Aggregate - Material passing the No. 8 sieve. Check aggregate specific gravity test procedures for sample requirements. JMF - The JMF of a mixture is defined as the combined gradation for the blended aggregate, the percentages of the various mixture components, the design asphalt binder content, and the mixture VMA. Maximum Density Line - The maximum density line is a straight line plot on the FHWA 0.45 power chart which extends from the zero origin point of the chart through the plotted point of the combined aggregate gradation curve on the nominal maximum sieve size. Nominal Maximum Sieve Size - The nominal maximum sieve size is one sieve size larger than the first sieve to retain more than 10 percent of the aggregate. Maximum Sieve Size - Maximum sieve size is the smallest sieve at which 100 percent of the aggregate passes. Rev. February 5, 2007 7
Page 1 and 2: MISSISSIPPI DEPARTMENT OF TRANSPORT
Page 3 and 4: TABLE OF CONTENTS (Cont’d.) Page
Page 5: APPENDIX 1: MISSISSIPPI TEST METHOD
Page 9 and 10: AASHTO Standards (Cont’d.) AASHTO
Page 11 and 12: CHAPTER 2 PERSONNEL REQUIREMENTS 2.
Page 13 and 14: Check sieves for conformance to AAS
Page 15 and 16: equest for transfer of the verified
Page 17 and 18: discussed a possible change for the
Page 19 and 20: equest must certify to the conditio
Page 21 and 22: Asphalt binder from the asphalt wor
Page 23 and 24: EXAMPLE Anticipated Tonnage For The
Page 25 and 26: A B State Contractor 40+ kg C Contr
Page 27 and 28: 5.4 Compaction of SHRP Gyratory Spe
Page 29 and 30: 5.5.4 On the first day of productio
Page 31 and 32: Where: A = Dry Mass of Test Specime
Page 33 and 34: 5.6.1.9 On the first day of product
Page 35 and 36: 5.9 Calculating Voids In Mineral Ag
Page 37 and 38: The specified JMF limits and warnin
Page 39 and 40: that the asphalt pump malfunctioned
Page 41 and 42: CHAPTER 6 MDOT QUALITY ASSURANCE PR
Page 43 and 44: verification test results fail to m
Page 45 and 46: Arrange to have a verification samp
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Page 49 and 50: mixture (401.02.6.3). 6.6 Guideline
Page 51 and 52: Result F Check complete. Use QA Spl
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The above table shows that the Step
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7.4.3 Nuclear Density Testing 1. Se
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The acceptable range of individual
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Site 1 Site 2 Site 3 Site 4 Site 5
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Allowable Gauge Bias Deviation (Tab
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Re-Evaluating a Corrected Lot (Two
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Rev. 6/01/05 Mississippi Department
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Excerpt from Materials Division Ins
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Materials Division Inspection, Test
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Approved by: D.B. McCaa S.O.P. No.:
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APPENDIX 2 FORMS Rev. February 5, 2
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TMD-005 QMP HOT-MIX ASPHALT Q.A. Mi
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TMD-008 MISSISSIPPI DEPARTMENT OF T
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TMD-042 MISSISSIPPI DEPARTMENT OF T
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Page 1 of 2 MISSISSIPPI DEPARTMENT
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Page 1 of 2 MISSISSIPPI DEPARTMENT
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APPENDIX 3 EXAMPLE PROBLEMS Rev. Fe
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7 Example No. 1 Air Voids 6.5 6 5.5
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Example No. 2 7 Air Voids 6.5 6 5.5
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FIELD MANUAL For HOT MIX ASPHALT (HMA) - Mississippi ...

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