State Study 111 - Polymer Modified Hot Mix Asphalt Field Trial.pdf

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for use under traffic (5 to 10 x 10 6 – 18,000 lb. ESALs design loading) and environmental conditions similar to those to be encountered on this field trial. Traffic and environmental data shall be documented. <strong>Polymer</strong> loading, asphalt cement grade that was modified, modified binder properties, aggregate gradation, and strength properties shall be listed at a minimum. This information will be used by MDOT to determine a polymer loading range for each individual modifier. The purpose here is to utilize a polymer loading for each particular modifier that is in keeping with customary loading rates for previous applications of the particular modifier and to target similar HMA properties for all modified HMA mixes used on the project. 7. The modifiers will be specified by brand name and manufacturer. The specific modifier within a “family” of polymers under the same name brand will be selected by the manufacturer. 8. Each modifier manufacturer will be required to perform laboratory testing with their modified binder to include all the SHRP binder tests. These test results must be submitted to MDOT before actual production of the modified HMA. If the polymer manufacturers desire, they are encouraged to also submit data from the SHRP mixture tests as well. 9. Each modifier manufacturer will be required to submit samples of the base cement without modification, the modified asphalt cement, and the modifier. FTIR testing will be done to verify polymer loading. 7
CHAPTER 3: DESIGN AND CONSTRUCTION This chapter covers the modified mixture designs by the MDOT Materials Division and details the asphalt plant and the paving of the roadway. MIXTURE DESIGNS The mix designs for the nine modified mixtures were the same for each with only the addition of the different modifier. Material types for the modified mixtures are given in table 1 for both the binder (high type binder course) HTBC and surface (high type surface course) HTSC. This table also lists the percentages of each type material. Both designs included reclaimed asphalt pavement (RAP) and the addition of 1 percent hydrated lime to reduce stripping. The gradation of the modified mixes are given in table 2 for both the binder and surface courses. The specified design range for the aggregate blend is also listed in table 2. Properties for the mixes are given in table 3. It is interesting to note that the job mix temperature for the modified mixes was 329 o F which is 31 o hotter than that for regular mix. For the modified mixes, the base petroleum asphalt cement was Grade AC 20 and the binder course had 4.8 percent and the surface course had 5.2 percent asphalt binder by weight of the total mix. The RAP used in both the binder and the surface mixes had an AC content of 5.13%. The RAP contributed 21% of the total AC used in the binder mix and 10% of the total AC used in the surface mix. The mix design for the control section, both binder and surface courses, was the same as the modified mixes except that petroleum asphalt cement Grade AC 30 was used instead of the AC 20. The information contained in tables 1 through 3 also apply to the control section. The polymer loading was a percentage of the base asphalt cement in the mix. This loading is given below: Tradename <strong>Polymer</strong> Loading (%) CRYOPOLYMER 10.0 KRATON 4.25 MULTIGRADE Indeterminable NOVOPHALT 5.5 ROUSE RUBBER 10.0 SEAL-O-FLEX 4.25 STYRELF 4.3 ULTRAPAVE 3.0 VESTOPLAST 7.0 ASPHALT PLANT The asphalt was produced in Lehman-Roberts plant near Grenada, MS. This plant was a batch plant with a single hot bin (figure 1). The hot mix asphalt was conveyed to the top of 8
Page 1 and 2: FINAL REPORT STATE STUDY NO. 111 PO
Page 3 and 4: NOTICE The contents of this report
Page 5 and 6: TABLE OF CONTENTS Section Page CHAP
Page 7 and 8: 22. FWD deflections for Styrelf 37
Page 9 and 10: SCOPE The experimental design calle
Page 11 and 12: This policy was not in effect when
Page 13: TRAFFIC VOLUMES Traffic for this se
Page 17: was then repeated for the surface c
Page 25 and 26: Table 1. Material Types for Polymer
Page 27 and 28: Table 4. Actual stationing for test
Page 29 and 30: Modifier Course Station-to-Station
Page 31 and 32: CHAPTER 4: TESTING PROCEDURES AND R
Page 33 and 34: CONTROL Section Both the binder and
Page 35 and 36: as would be expected for new paveme
Page 37 and 38: BINDER AIR VOIDS AIR VOIDS, % 9 8 7
Page 39 and 40: VISCOSITY CHART FOR BINDER COURSES
Page 42 and 43: AVERAGE SHEAR STRENGTH COMPUTED FRO
Page 44 and 45: FWD DATA FOR KRATON (Sensor locatio
Page 46 and 47: FWD DATA FOR NOVOPHALT (Sensor loca
Page 48 and 49: FWD DATA FOR ULTRAPAVE (Sensor loca
Page 50 and 51: FWD DATA FOR CRYOPOLYMER RUBBER (Se
Page 52 and 53: FWD DATA FOR CONTROL SECTION (Senso
Page 54 and 55: AVERAGE RUT DEPTH (INCHES) 0.40 0.3
Page 56 and 57: APA AVERAGE RUT DEPTHS OF CORES AT
Page 60 and 61: Table 8. Relative ranking of the di
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APPENDIX A ROLLING PATTERNS 56
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POLYMER MODIFIED HMA FIELD TRIAL RO
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ASPHALT INSPECTORS DAILY REPORT Lot
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Lot No. 180 Date 08/07/1996 Project
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APPENDIX C MANUAL RUT MEASUREMENTS
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State Study 111 - Polymer Modified Hot Mix Asphalt Field Trial.pdf

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