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

LPC Bituminous Mixtures Design Guide- Mix Design Procedure -Influence from type of aggregate and rheology of hard bitumen on the properties of hot asphaltmixtures used as a pavement base course and foundation layerP. Bauer - S. Glita - P. Chaverot - J.M. Michou - P. Perdereau - Y. VincentEurasphalt & Eurobitume 1996. 4.050Bitumen characteristicsUnits Mixelf 10/20 15/25BeforeRTFOTAfterRTFOTBeforeRTFOTAfterRTFOTBeforeRTFOTAfterRTFOTPenetrability at25°C1/10 mm 15 10 13 10 21 13Ring and balltemperature °C 68 73,5 69 75 62 72Constant richness modulus: 3,65; AC14-EME - type 2; particle size distribution curve ~ constantAggregate characteristics: 4 origins: D; Q; C; SC (SC is an alluvial material)Results from Gyratory Compactor testingAggregate D Aggregate Q Aggregate C Aggregate SCSlope K 3,65 3,44 4,12 3,27Voids calculated for 1 22 21 23,9 19,4gyration % V 1Voids at 100 gyrations %V 1005 5,1 4,8 4,2Results from wheel tracking tests60°C, 30,000 cycles: rutting depth less than 5 mm, regardless of binder and aggregate, except foraggregate SC (6 to 8 mm).Stiffness modulus test in direct tension10°C, 0.02 sec: The stiffness modulus exceeds 20000 MPa.Aggregate origin induces a 20% variation (Mixelf bitumen).(increasing trend C -> SC -> Q ->D)Bitumen origin leads to a 10% deviation for aggregate C (15/25 -> {10/20 & Mixelf}) and an 18%deviation for aggregate D (15/25 -> {10/20 & Mixelf}).Complex modulus test15°C, 10 HzAggregate origin produces an 18% deviation (Mixelf bitumen) (C=SC=Q->D)No "aggregate" effectFatigue test- 89 -