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1/16/2012OVERVIEW OF RECYCLING PROJECTSINCORPORATING BSM LAYERSCLIMATIC CONSIDERATIONSISAP Working Group WG2Champagne Sports ResortSunday 11 September 2011Dave CollingsLOUDONINTERNATIONALTOPICSCLIMATE CONCERNS Moisture TemperatureMOISTURE CONDITIONS During construction After finishing / before surfacingTEMPERATURES During construction“BSM”TG2 (2009) Operating conditions1
1/16/2012NON-CONTINUOUS BONDSRELATIVELY HIGH VOID CONTENTMOISTURE SUSCEPTIBILITY2
1/16/2012DETERMINATION OF THE EFFECT OF ACTIVE FILLERMATERIAL TO BE Pebbles Gravel RA80/100 PenAs shownkm 1 000SAPREFContractorLocation / Source:Mod AASHTO(kg/m3)Optimum moisture content (%):2075Active Filler8.0FOAMED BITUMEN STABILISED MATERIAL SPECIMENSVibratory Hammer : TG2(2009) Method 8(2)Compactive effortFoamed Bitumen added100mm(%)Bitumen foaming conditions:Type and percent filler added (%)2.52.52.5Water added (%)2.3Temperature ( C)No filler1% Lime1% CementMoulding moisture content(%)6.16.26.2TEST RESULTSITS .4Moisture content at breakDry DensityTemperature at breakITS wetMoisture content at breakDry DensityTemperature at breakdiameter06 January 2011Date mouldedkg/m3(oC)kg/m3(oC)1753
1/16/2012FOAMED BITUMEN MIX DESIGN REPORT - LEVEL 1LEVEL 1MATERIAL TO BE STABILISEDDescriptionAggregatesBitumenPa R Br Qtz Pebbles Gravel RA80/100Limekm 1 000SAPREFNorthern LimeLocation / Source:Maximum Dry Density(kg/m3)Active FillerOptimum moisture content (%):20758.0FOAMED BITUMEN STABILISED MATERIAL SPECIMENSVibratory Hammer : TG2(2009) Method 8(2)Compactive effortFoamed Bitumen addeddiameter2.002.25Water added (%)2.3Temperature ( C)1751% Lime1.751% Lime1% Lime1% Lime6.67.66.26.7(%)Bitumen foaming conditions:Type and percent filler added (%)Moulding moisture content100mm φ100mm10 January 2011Date moulded(%)2.50TEST RESULTSITS dry227(kPa)(%)Moisture content at breakDry Densitykg/m3(oC)Temperature at breakITS wetDry DensityTemperature at breakTensile Strength 073208320942110(oC)25.325.225.225.3(%)65696265BSM 1BSM 1BSM 1BSM 1% Foamed Bitumen vs ITS% Foamed Bitumen vs Dry density2150Dry density (kg/m 3)ITS 2 (2009) Material ClassificationBASED ON ITSDRY AND ITSWET4203551.02076147(kPa)Moisture content at break2631.1208721252100207520502.00ITS dryITS wet2.252.50Foamed Bitumen added1.752.00Dry Specimens2.252.50Foamed Bitumen addedWet specimensFOAMED BITUMEN MIX DESIGN REPORT - LEVEL 1MATERIAL TO BE STABILISEDDescriptionAggregatesBitumenPa R Br Qtz Pebbles Gravel RA80/100Limekm 1 000SAPREFNorthern LimeLocation / Source:Maximum Dry Density(kg/m3)Active FillerOptimum moisture content (%):20758.0TG2 CLASSIFICATION(kPa)FOAMED BITUMEN STABILISED MATERIAL SPECIMENSVibratory Hammer : TG2(2009) Method 8(2)Compactive effortFoamed Bitumen added1.75(%)Bitumen foaming conditions:Type and percent filler added (%)Moulding moisture content100mmdiameter10 January 2011Date moulded(%)2.002.25Water added (%)2.3Temperature ( C)1751% Lime1% Lime1% Lime1% Lime2.506.67.66.26.7TEST RESULTSITS dryMoisture content at breakDry DensityTemperature at breakITS wetMoisture content at breakDry DensityTemperature at breakTensile Strength %)65696265BSM 1BSM 1BSM 1BSM 1kg/m3TG2 (2009) Material ClassificationBASED ON ITSDRY AND ITSWETBSM‐1 BSM‐2 BSM‐3 225 175 125 100 75 504
1/16/2012FOAMED BITUMEN MIX DESIGN REPORT - LEVEL 2MATERIAL TO BE STABILISEDLEVEL 2AggregatesDescriptionMaximum Dry DensityBitumenActive FillerPa R Br Qtz Pebbles Gravel RA80/100Limekm 1 000SAPREFNorthern LimeLocation / Source:(kg/m3)Optimum moisture content (%):20758.0FOAMED BITUMEN STABILISED MATERIAL SPECIMENS150mmMod AASHTO TMH 1 A7Compactive effortdiameter17 January 2011Date mouldedFoamed Bitumen added2.02.12.22.3Water added (%)2.3Temperature ( C)175(%)Bitumen foaming conditions:Type and percent filler added (%)Moulding moisture content1% Lime1% Lime1% Lime1% 82070206120842092TEST RESULTSITS equilibruimMoisture content at break150mm φDry densitykg/mTemperature at breakITS soakedMoisture content at breakDry 707587BSM 1BSM 1BSM 1BSM 1kg/mTemperature at breakTensile Strength Retained33TG 2 (2009 ) Material ClassificationBASED ON ITSEQUIL VALUES ONLY% Foamed Bitumen vs ITS400% Foamed Bitumen vs Dry density2100Dry density (kg/m3)ITS (kPa)3503002502001501002.02.1ITS equilITS soaked2.22.3Foamed Bitumen added20902080207020602050204020302.02.1Equil specimensSoaked specimens2.22.3Foamed Bitumen addedFOAMED BITUMEN MIX DESIGN REPORT - LEVEL 2MATERIAL TO BE STABILISEDDescriptionAggregatesBitumenPa R Br Qtz Pebbles Gravel RA80/100Limekm 1 000SAPREFNorthern LimeLocation / Source:Maximum Dry Density(kg/m3)Active FillerOptimum moisture content (%):2075TG2 CLASSIFICATION8.0(kPa)FOAMED BITUMEN STABILISED MATERIAL SPECIMENS(%)Bitumen foaming conditions:Type and percent filler added (%)Moulding moisture contentdiameter17 January 2011Date mouldedFoamed Bitumen added150mmMod AASHTO TMH 1 A7Compactive effort(%)2.02.12.22.3Water added (%)2.3Temperature ( C)1751% Lime1% Lime1% Lime1% Lime7.98.47.87.9BSM‐1 BSM‐2 BSM‐3TEST RESULTSITS equilibruimMoisture content at breakDry densityTemperature at breakITS soakedMoisture content at breakDry densityTemperature at breakTensile Strength %)69707587BSM 1BSM 1BSM 1BSM 1kg/m3TG 2 (2009 ) Material ClassificationBASED ON ITSEQUIL VALUES ONLY 175 135 75 150 100 60( 100)( 75)( 50)5
1/16/2012Moisture Induction Sensitivity Test (MIST)MOISTURE CONTENTMixing moisture content / compaction6
1/16/2012DRY CONDITIONS“Equilibrium moisture content”Effect of altitude7
1/16/2012Working at 4 000mDrying to hygroscopic moisture content“Pore fluid suction pressure”8
1/16/2012APPLY SURFACINGEstablish equilibrium moisture contentSURFACE TREATMENT9
1/16/2012APPLY HMA SURFACING10
1/16/2012COLD CLIMATES11
1/16/2012STABILISE FRESH CRUSHED STONE MATERIAL: 200mm19mm CHIP SEAL12
1/16/2012Anchorage – Fairbanks, AlaskaSeptember 2005February 2006- 45 C13
1/16/2012“BLISTERS”HIGH SALT CONTENT14
1/16/2012HOT CLIMATES100% RA MATERIALPremature Rutting66ºC40mm HMA58ºC200mm BSM FoamTemperatures47ºC 200mm Pulverised RAP 100% RA(grading!)Overloading15
1/16/2012 Forensic AnalysisShearstress 33.2º40ºC50ºC50ºC60ºC100% RAPAdd 25%Cr DustOverloadC 134 kPaNormalload NormalstressGREAT RIFT VALLEY, KENYAMaai Mahiu – Narok (98km)Road rehabilitation / upgrade2008 / 201016
1/16/201220mm Cape SealNEWRECYCLED175mm BSM 1 base (G2)300mm Cemented subbase150mm selected subgradeSubgrade CBR 1017
1/16/2012Completed Cape SealHEAVY TRAFFICKING18
1/16/2012THANK YOU !!19
During construction . Fairbanks, Alaska September 2005 . (G2) 150mm selected subgrade Subgrade CBR 10 20mm Cape Seal RECYCLED NEW. 1/16/2012 18 Completed Cape Seal HEAVY TRAFFICKING. 1/16/2012 19 THANK YOU !! Title: Microsoft PowerPoint -
