6. LPC Bituminous Mixtures Design Guide, Sept 2007. - Aapaq.org

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LPC Bituminous Mixtures Design Guide– Appendix G - Glossary –TermSymbol orAbbreviationUnitDefinitionCommentsbasic bitumen modifies the chemicalstructure and the physical and mechanicalproperties.These bitumens are prepared prior toapplication within a specialized unit. Thechemical agents employed include naturalrubber, synthetic polymers, sulfur andcertain organic-metallic compounds; theydo not include oxygen, oxidation catalysts,fibers, mineral powders or adhesionagents.Porous asphaltPA-BBDrPorous asphalt, in accordance withEN 13108-7.Bituminous mixture in accordance withEN 13108-7, characterized by apercentage of voids exceeding or equal to20% and a void shape such that rainwateris able to circulate into the connectingvoids; this material is designed to yieldsurface courses with an average thicknessof 3-4 cm (PA6) and 4-5 cm (PA10).Pure bitumenConventional bitumen obtained by meansof various refining processes using crudeoil as a base. No additive is included forthe purpose of modifying the material'sconsistency.NF P 98-149ReclaimedasphaltRA orAEGranular materials stemming from eitherthe milling or demolition of asphalt mixesand entering into the composition ofrecycled mixes.NF P 98-149EN 13108-8RecycledaggregateAn aggregate resulting from processing ofinorganic materials previously used inconstruction.EN 13043RegulatingcourseCourse of variable thickness applied to anexisting course to provide the necessaryprofile for a further course of consistentthickness.EN 13108 seriesRepeatabilityReliability of measures under conditions ofrepeatability, i.e.: conditions according toISO 5725- 190 -
LPC Bituminous Mixtures Design Guide– Appendix G - Glossary –TermSymbol orAbbreviationUnitDefinitionCommentswhich the results of independent tests areobtained using the same method onidentical test specimens, in the samelaboratory, by the same operator, inemploying the same equipment and over ashort span of time.RepeatabilitylimitrValue below which the absolute value ofthe difference between two test results lies,with 95% probability, as obtainedaccording to repeatability conditions.ReproducibilityReliability of measures under conditions ofreproducibility, i.e.: conditions according towhich test results are obtained using thesame method on identical test specimens,in different laboratories, by differentoperators, in employing differentequipment.ISO 5725ReproducibilitylimitRValue below which the absolute value ofthe difference between two test results lies,with 95% probability, as obtainedaccording to reproducibility conditions.Richness modulusConventionalspecific surfaceareaΣm 2 /kg Determined by the following relation:100 Σ = 0,25 G + 2,3 S + 12 s + 150 f, with:G proportion of elements larger than6,3 mm,S proportion of elements lying between6,3 mm and 0,250 mm in size,s proportion of elements between0,250 mm and 0,063 mmf proportion of elements smaller than0,063 mmThis calculation isnot applicablewhen the mixturecontains eitherspecial fines oradditives, suchas fibers.Richness modulusCorrectioncoefficientα α = 2,65 / ρ Gwith ρ Gbeing the aggregatemass density in terms of grams per cubiccentimeter.This coefficient isemployed inparticular tocalculate bitumencontents on thebasis of therichnessmodulus.- 191 -
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LPC Bituminous Mixtures Design Guid
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Table of ContentsPREFACE ..........
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3.4.4 Discontinuity ...............
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Table of illustrationsFigure 1: Gyr
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Table 40 - Adjustment to average te
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6. LPC Bituminous Mixtures Design Guide, Sept 2007. - Aapaq.org

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