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

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5.2.3.4 Mixture Sampling Point. Sample all mixture samples from the truck box. Truck box sampling presents some safety hazards because it may be necessary to climb on top of the truck box and stand on the hot mixture while sampling in order to obtain a representative sample. After the last batch has been dumped into the truck box, establish a reference point on the surface of the load, either at the high point, if some semblance of a conical shape exists, or near the middle of the truck box if the surface shows no such conical shape. Then establish at least three incremental sample points about midway between the previously established point and the sides to the truck and equally spaced around the load (see sketch). At these sampling points, remove the upper 2 to 3 inches of mixture, insert the sampling shovel or other device into the mixture to extract the sample increments and place increments in a sample container. The total sample shall have a mass of at least 40 kg. X - Reference Point A A - Sample Point B X B - Sample Point C C - Sample Point 5.2.3.5 Sample Identification. Bag/Box and label the retained portion of all samples. The label shall include: State or Contractors sample. Project ID. Date sample was taken. Sample No. Sample tonnage point. Percent AC being metered into the mixture at time the sample was taken. Mixture Type Designation being produced. Pavement layer being placed. Percent RAP setting at the time sample was taken, when applicable. 5.3 Reduction of Mixture Samples to Testing Size 5.3.1 General. The entire sample shall be mixed and quartered on a clean, smooth, metal surfaced table, with a minimum surface of 48 inches x 48 inches (it is recommended that this table be heated). 5.3.2 Initial Sample. Quarter the sample into State and Contractor samples. Start with the total minimum 40 kg of mix. Place entire sample on table, quickly mix and quarter to minimize temperature loss. Quarter sample as shown in the following sketch: Rev. February 5, 2007 24
A B State Contractor 40+ kg C Contractor D State Combine diagonal quarters as indicated on the sketch to form the State sample (A & D) and the Contractor sample (B & C) for further quartering. Continue quartering process until test samples are in the oven. Place in a closed container and label the retained sample with the required information in Subsection 5.2.3.5 of this manual. Store samples in a safe place until no longer needed for sample verification. Retain the State sample (A&D) (minimum of 20+ kg) in a dry and protected location at the laboratory site. Retain these samples until picked up by MDOT for the dispute resolution process (if needed) or 14 calendar days, whichever occurs first. At the completion of the project, the remaining samples may be discarded with the approval of the Engineer. 5.3.3 Nuclear AC / Moisture / Gyratory Reduction. Reduce the 20+ kg of mix from Subsection 5.3.2 of this manual into a Gyratory sample and a Nuclear AC / Moisture sample or retained sample according to the following sketch: A Gyratory (G mb )Tests C Nuclear AC/Moisture & Mix Tests B Nuclear AC/Moisture & Mix Tests D Gyratory (G mb )Tests 20+ kg Rev. February 5, 2007 25
Page 1 and 2: MISSISSIPPI DEPARTMENT OF TRANSPORT
Page 3 and 4: TABLE OF CONTENTS (Cont’d.) Page
Page 5 and 6: APPENDIX 1: MISSISSIPPI TEST METHOD
Page 7 and 8: FHWA - Federal Highway Administrati
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: EXAMPLE Anticipated Tonnage For The
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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
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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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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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