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  • RAILWAY INFRASTRUCTURE & SUSTAINABILITY: CRUMB RUBBER MODIFIED BITUMEN FOR SUB-

    BALLAST LAYER

    JULIA I. REAL HERRIZTransportation & railway engineering professor

    Universidad politcnica de Valencia

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    PRIVATE COMPANIES

    PUBLIC ENTITIES SUBCONTRACTED

    Integrated project of CDTI national aid program

    Starting Date SEPTEMBER 2009

    Date of Approval APRIL 2010

    End Date JANUARY 2012

    TOTAL BUDGET 4.064.706,00

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    NDEX

    1. Can we assure that rail transport is sustainable?

    2. Can we add waste to railway infrastructure?

    3. Can we add crumb rubber modified bitumen to sub-ballast?

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    1. Can we assure that rail transport is sustainable?

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    1. Can we assure that rail transport is sustainable?

    SOURCES SAY THAT:

    RAILWAY:

    -Less emission Transport

    -Efficient Transport

    -Safe Transport

    -Petrol-Independent Transport

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    2. Can we add waste to railway infrastructure?

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    2008/98/CE

    2. Can we add waste to railway infrastructure?

    -Waste+treatment= raw material

    -0% disposal.

    -Waste hierarchy:Energy recovery Recycling

    -...

    -Demolition waste Road gravelA-367-A-357 Malaga

    -Steelworks waste Granular layersEje del Ballonti

    -Dredging materials Fine aggregateTarragona Harbour

    -...

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    BallastSub-ballast SleepersRailsFastenersElastomers

    4.200 m38.000 t

    5.000 m310.000 t

    3.333 sleepers550 m3 concrete

    50 t steel1.100 t aggregate 6.666 pads

    3.333 sleeper pads

    13.333 fasteners

    240 t steel

    2000 cable ducts150 m3 concrete

    Cable ducts

    2. Can we add waste to railway infrastructure?

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    3. Can we add crumb rubber modified bitumen to sub-ballast?

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    30 CM

    BEARING CAPACITY

    IMPERMEABILITY

    3. Can we add crumb rubber modified bitumen to sub-ballast?

    -Crumb rubber modified bitumen, is widely used in roads

    -1978 PlusRide: First patent E.E.U.U.

    -1994 First experience in Spain

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    2

    22,,, )()( tzxzxzx

    =++

    d dd

    9 cm

    3. Can we add crumb rubber modified bitumen to sub-ballast?

    Wave equation

    HIGH VIBRATION ATTENUATION CAPACITY!

    Visco-elastic behavior: Increased dynamic power dissipation at higher %Crumb Rubber (Viscosity: medium-high frequency) Increased Stiffness(Two order of magnitude: low frequency)

    Closed MixtureGap Index < 6%

    Gap Index Test(UNE- EN 12697-8)

    Settlement

    (mm)

    Stress (Pa)

    1,03 49.700

    FACTORED STATIC LOAD(EISENMANN)

    Qd=Qe*(1+t*s*)Qe=17 t/axle Qd=27 t/axle

    EMBANKMENT: Type QS3(E=80Mpa)

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    SUB-BALLAST TYPE MATERIAL COST+PLACEMENT (/m3)GRANULAR SUB-BALLAST 20

    CRM BITUMEN SUB-BALLAST 100

    SUB-BALLAST TYPEBULDING COST

    1 km DOUBLE TRACK ()

    GRANULAR SUB-BALLAST 88.000CRM BITUMEN SUB-

    BALLAST 128.000

    SUB-BALLAST TYPE MATERIAL COST+ SHIPPING + PLACEMENT ()20 km 40 km 60 km 80 km 100 km

    GRANULAR SUB-BALLAST 102.000 121.000 141.000 160.000 179.000

    CRM BITUMEN SUB-BALLAST 135.000 141.000 147.000 154.000 160.000

    3. Can we add crumb rubber modified bitumen to sub-ballast?

    TestFATIGUE RESISTANCE

    (UNE- EN 12697-24; part 24)

    UNALTERABLE(10.106 load cycles)

    Short termAcceptable economic cost

    Long termAcceptable

    economic cost

  • I RAIL TECHNOLOGICAL FORUM FOR INTERNATIONALIZATION

    To sum up

    1. Can we assure that rail transport is sustainable? YES

    2. Can we add waste to railway infrastructure? YES

    3. Can we add crumb rubber modified bitumen to sub-ballast? YES

    Nmero de diapositiva 1Nmero de diapositiva 2Nmero de diapositiva 3Nmero de diapositiva 4Nmero de diapositiva 5Nmero de diapositiva 6Nmero de diapositiva 7Nmero de diapositiva 8Nmero de diapositiva 9Nmero de diapositiva 10Nmero de diapositiva 11Nmero de diapositiva 12Nmero de diapositiva 13

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