LARIMER COUNTY RURAL AREA ROAD STANDARDS

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Appendix D – Construction StandardsSection D.2 Revisions to CDOT Standards Specifications for Road and Bridge ConstructionD.2.11 Revision of Section 403 – Hot Mix AsphaltREVISION OF SECTION 403HOT MIX PAVEMENTSubsection 403.02 shall include the following:The design mix for hot mix asphalt shall conform to the following:TABLE 403-1PropertyTestMethodValues For All Gradings(75) (100) CommentsAir Voids, percent at:N (initial) [information only]N (design)CPL 5115>9.53.5 – 4.5>11.03.5 – 4.5Lab Compaction (Gyrations):N (initial)[ information only]N (design)CPL 51157758100Stability, minimum CPL 5106 28 30Aggregate Retained on the No. 4Sieve with at least 2 MechanicallyInduced fractured faces, %minimumAccelerated MoistureSusceptibility Tensile StrengthRatio (Lottman), minimumCP 45 70 70CPL 5109Method B80% 80%Minimum Dry Split TensileStrength, kPa (psi)CPL 5109Method B205 (30) 205 (30)Grade of Asphalt Cement, AllLayersSee Table 403-3 and403-4Voids in the Mineral Aggregate(VMA) % minimumCP 48See Table403-2See Table403-2Voids Filled with Asphalt (VFA), % AI MS-2 65 - 80 65 - 75Dust to Asphalt Ratio:Fine GradationCourse Gradation0.6 – 1.20.8 – 1.60.6 – 1.20.8 – 1.6Note: AI MS-2 = Asphalt Institute Manual Series 2Note:The current version of CPL 5115 is available from the Colorado Department ofTransportation Region 4 Materials Engineer.Larimer County Rural Area Road Standards Page D-15October 22, 2007
Appendix D – Construction StandardsSection D.2 Revisions to CDOT Standards Specifications for Road and Bridge ConstructionNote:Note:Mixes with gradations having less than 40% passing the No. 4 sieve shall beapproached with caution because of constructability problems.Table 1 of CPL 5115, which contains the laboratory mixing and compactiontemperatures to be used for mix design development and laboratory verification ofproject produced mixtures, is deleted for this project and replaced with the following:SuperpaveBinder GradeCPL 5115 TABLE 1Laboratory MixingTemperature, °C (°F)LaboratoryCompactionTemperature, °C (°F)PG 58-28 154 (310) 138 (280)PG 58-22 154 (310) 138 (280)PG 64-22 163 (325) 149 (300)PG 70-28 163 (325) 149 (300)PG 64-28 163 (325) 149 (300)PG 58-34 154 (310) 138(280)PG 76-28 163 (325) 149 (300)TABLE 403-2Minimum Voids in the Mineral Aggregate (VMA)NominalDesign Air Voids **Maximum Size*,mm (inches) 3.5% 4.0% 4.5%37.5 (1½) 11.6 11.7 11.825.0 (1) 12.6 12.7 12.819.0 (¾) 13.6 13.7 13.812.5 (½) 14.6 14.7 14.89.5 ( 15.6 15.7 15.8* The Nominal Maximum Size is defined as one sievelarger than the first sieve to retain more than 10%.** Interpolate specified VMA values for design air voids between those listed.In an effort to simplify the binder selection process, the following binder grades have beenspecified for the various types of construction and road classifications. Included in this table arethe design gyration requirements.Larimer County Rural Area Road Standards Page D-16October 22, 2007
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LARIMER COUNTYRURAL AREA ROAD STAND
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Table of Contents3.3.11 Typical Str
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Table of ContentsCHAPTER 8 - ENVIRO
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Table of Contents12.3.7.2 Conventio
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Table of ContentsG.7.12 Other Permi
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Chapter 1 - General InformationSect
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Chapter 2 - Submittal ProceduresSec
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Chapter 2 - Submittal ProceduresSec
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Chapter 3 - Submittal Requirements
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Chapter 4 - Road Design and Technic
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4.9.1.7 Design VehiclesChapter 4 -
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CHAPTER 5 - GEOTECHNICAL STANDARDS
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Chapter 5 - Geotechnical Standards
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Chapter 6 - STORMWATER MANAGEMENTSe
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Chapter 7 - Bridges and Major Drain
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Chapter 8 - Environmental and Agric
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Chapter 8 - Environmental and Agric
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9.1.3 DefinitionsChapter 9 - Roadwa
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CHAPTER 10 - ACCESS REQUIREMENTS AN
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Chapter 10 - Access Requirements an
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CHAPTER 11 - ACCESS AND UTILITY PER
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Page 93 and 94: Appendix A - Definitions and Abbrev
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Page 97 and 98: APPENDIX B - REFERENCES AND RESOURC
Page 110 and 111: APPENDIX D - CONSTRUCTION STANDARDS
Page 112 and 113: Appendix D - Construction Standards
Page 130 and 131: APPENDIX E - CONSTRUCTION TESTING F
Page 132 and 133: Appendix F - Guidelines for Traffic
Page 140 and 141: APPENDIX G - DESIGN AND CONSTRUCTIO
Page 142 and 143: Appendix G - Design and Constructio
Page 154 and 155: Appendix H - General NotesSection H
Page 162 and 163: APPENDIX I - VARIANCE REQUEST SUBMI
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LARIMER COUNTY RURAL AREA ROAD STANDARDS

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