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

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LPC Bituminous Mixtures Design Guide– Appendix G - Glossary –TermSymbol orAbbreviationUnitDefinitionCommentsHigh-modulusbituminousmixtureAC-EMEHigh-modulus (stiff) bituminous mixture, inaccordance with EN 13108-1. This materialis used for base courses and is relevantfrom “fundamental approach”Hot RolledAsphaltHRADense, gap-graded bituminous mixture inwhich the mortar of fine aggregate, fillerand high viscosity binder are majorcontributors to the performance of the laidmaterial. The proportion of fine aggregateis high (on the order of 50%), while thefines content stands at approximately 9%;coarse aggregates only represent 30% ofthe total mixture. The bitumen content lieson the order of 7% to 8%. The percentageof voids is very low; when used on wearingcourses, this material is chipped with 10/16or 10/20 coarse aggregates.EN 13108-4HydrocarbonbinderA generic term used to designate anadhesive material containing bitumen, taror both.EN 12597Input targetcompositionExpression of a mix formulation in terms ofthe constituent materials, the grading curveand the percentage of bitumen added tothe mixture. This will usually be the resultof a laboratory mix design and validation.The French approach is usually based onthe “Input target composition”EN 13108 seriesInternal bindercontentBtl intTl%(int.)Ratio of the binder mass to total mixturemass. It is expressed as B in EN versionas tl int in some French standards and as Tlin the French version of the EN standards.The EN asphaltmix "product"standards fromthe EN 13108series dictate theB (tl Int ) value.LayerElement of pavement laid in a singleoperation.EN 13108 seriesLimeMaterial comprising any physical andchemical forms under which calciumand/or magnesium oxide and/or hydroxidecan appear.EN 459-1- 186 -
LPC Bituminous Mixtures Design Guide– Appendix G - Glossary –TermSymbol orAbbreviationUnitDefinitionCommentsAir limeLimes mainly consisting of calcium oxide orhydroxide which slowly harden in air byreacting with atmospheric carbon dioxide.Generally they do not harden under wateras they have no hydraulic properties. Theymay be either quicklimes or hydratedlimes.Loss of linearity Γ - Relative decrease in modulus of abituminous mixture as the yield strengthincreases. This determination is a specialaspect of the direct tensile test described inStandard NF P 98-260-1, which has notbeen included in the European StandardEN 12697-26. The test is conducted at 0°Cand the specimen is submitted tosuccessive tensile forces for 30-secondload times (and then reset to zero). Thedeformation rises from 50 10 -6 to 500 10 -6 .Loss of linearity is the relative drop inmodulus value at a deformation of 500 10 -6as a ratio of the modulus decreaseobtained at zero deformation. The modulusat zero deformation can be obtained bymeans of extrapolation.The loss oflinearity providesan indication onthe state ofmaterial damage.Lower thermalsusceptibilitybitumenA special bitumen, whose ring and balltemperature is higher than that of thecorresponding paving grade bitumen.ManufacturedaggregateAn aggregate of mineral origin resultingfrom an industrial process involvingthermal or other modifications.EN 13043Maximumdensityρ mvMVRg/cm 3orkg/m 3orMg/m 3ρ mvRatio of the mass of a test specimen to its (maximal density byabsolute volume, i.e. without incorporating volumetric procedure)the voids. Maximum density is determinedaccording EN 12697-5, Method A usingwater.Mix designProcedure consisting of adjusting, using aminimum number of tests, the compositionof a formula so that it is able to satisfy alldesign testing requirements and ultimatelyother requirements as well.- 187 -
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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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