Beth Comes.  The objective of this task is to develop a mix design procedure for the various types of FDR.  Each type of FDR has separate mix design:

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Presentation transcript:

Beth Comes

 The objective of this task is to develop a mix design procedure for the various types of FDR.  Each type of FDR has separate mix design: ◦ Unstabilized ◦ Stabilized FDR with Portland Cement ◦ Stabilized FDR with Fly Ash ◦ Stabilized FDR with Asphalt Emulsion ◦ Stabilized FDR with Asphalt Emulsion with 1% Lime ◦ Stabilized FDR with Foamed Asphalt with 1% Portland Cement

FDR SourceGradation FDR Type UnstabilizedStabilized with PC (3, 5, 7 %) Stabilized with Fly Ash (10, 12, 15 %) Stabilized with Asphalt Emulsion (3, 4.5, 6 %) Stabilized with Asphalt Emulsion (3, 4.5, 6 %)+ Lime Stabilized with Foamed Asphalt (2.5, 3, 3.5 %) + PC Poor Dirty -Moisture- density curve -Mr and CBR -Moisture-density curve - Compressive strength -Moisture sensitivity -Moisture-density curve - Compressive strength -Moisture sensitivity -Superpave Gyratory - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning -Superpave Gyratory - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning -Superpave Gyratory - Moisture-density curve (use results of unstabilized) - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning Clean -Moisture- density curve -Mr and CBR -Moisture-density curve - Compressive strength -Moisture sensitivity -Moisture-density curve - Compressive strength -Moisture sensitivity -Superpave Gyratory - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning -Superpave Gyratory - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning -Superpave Gyratory - Moisture-density curve (use results of unstabilized) - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning Good Dirty -Moisture- density curve -Mr and CBR -Moisture-density curve - Compressive strength -Moisture sensitivity -Moisture-density curve - Compressive strength -Moisture sensitivity -Superpave Gyratory - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning -Superpave Gyratory - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning -Superpave Gyratory - Moisture-density curve (use results of unstabilized) - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning Clean -Moisture- density curve -Mr and CBR -Moisture-density curve - Compressive strength -Moisture sensitivity -Moisture-density curve - Compressive strength -Moisture sensitivity -Superpave Gyratory - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning -Superpave Gyratory - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning -Superpave Gyratory - Moisture-density curve (use results of unstabilized) - Bulk density using Corelok - Maximum density using Corelok -Moisture conditioning

 For Unstabilized FDR, four levels: 25, 50, 75% virgin material and 100% virgin materials as the control  5 - points moisture density curves for Unstabilized, Stabilized with PC, and Stabilized with Fly Ash  5 levels of stabilizer (PC, Fly Ash, Emulsion, Emulsion + Lime, Foamed Asphalt + PC)  Lime content for Emulsion + Lime stabilizer is constant: 1.0 % Lime  PC content for Foamed Asphalt + PC stabilizer: 1.0 % (if failed given conditions, use 2.0% PC)

 Foamed Asphalt with PC – approx November 1 st  Asphalt Emulsion – approx December 1 st  Emulsion with 1% Lime – approx January 1 st

 Similar to Task 3  Main Difference for Task 4  A uniform section is used in the stress calculations for the resilient modulus

302 psi

Passing: Strength ≥ 40 psi

 Tube Suction (passing) ◦ Average dielectric reading for the last 3 days < 10 ◦ Soaked Strength ≥ 75% Unsoaked Strength  Moisture Conditioning (passing) ◦ Split tensile strength ≥ 25 psi

 Dr. Bang, Professor SDSM&T  Dr. Roberts, Assistant Professor SDSM&T  Dr. Sebaaly, UNR  Dan Johnston, SDDOT  Wade Lein, SDSM&T  Mike deStigter, SDSM&T  Leah Nehl, SDSM&T  Shaun Herrod, SDSM&T