AT DALLAS-FORT WORTH REGIONAL AIRPORT.....LARGEST LIME STABILIZATION JOB IS GEARED TO 500 TONS DAILY

LIME SUBGRADE STABILIZATION FOR THE DALLAS-FORT WORTH AIRPORT (2.1 MILLION SQ YD OF RUNWAY AND TAXIWAY AREAS) IS BEING ACCOMPLISHED BY THE FOLLOWING STEPS: GRADE PREPARATION BY REMOVAL OF EARTH FROM THE PROCESSING AREA; DAILY SPREADING OF 500 TONS OF ITME WHICH IS DISCED IS WITH HEAVY-DUTY DISC PLOWS; TWO COVERAGES TO FULL DEPTH WITH THE MIXERS TO INSURE THOROUGH INCORPORATION OF THE LIME, WITH WATER BEING DROPPED ALL THE WHILE; AND AFTER A 48- HR. PAUSE, FINAL MIXING. THE CURING PROCEDURE HAS DEPARTED EXPERIMENTALLY FROM HIGHWAY PRACTICE. THE FINISHED SURFACE IS LOOSENED TO 1.5 OR 2 IN. DEPTH WITH DISCS, BLADES OR A ROTOTILLER. EMULSION CONTAINING 0.3 TO 0.4 GAL PER SQ YD OF RESIDUAL ASPHALT, GRADE EA-11M, IS WORKED INTO THE LOOSENED MATERIAL, TAKING SEVERAL DISTRIBUTOR PASSES TO APPLY THE FULL GALLONAGE WHILE WORKING THE ASPHALT IN. BESIDE KEEPING THE CURING MOISTURE IN, THE SEAL IS DESIGNED TO WATERPROOF THE PREPARED GRADE AND PROTECT IT DURING PASSAGE OF ANY CONSTRUCTION VEHICLES. THE LIME TREATMENT MUST WAIT 75 DAYS BEFORE THE CONCRETE PAVING CONTRACTOR CAN COVER IT. THIS IS CONSIDERED NECESSARY FOR THOROUGH CURING, AND FOR ANY POTENTIAL WEAK SPOTS TO SHOW UP AND BE CORRECTED. THE INTERVAL ALSO GIVES TIME FOR THE FIELD'S SUBSURFACE WATER TABLE TO COME INTO EQUILIBRIUM.

  • Publication Date: 1972-5

Media Info

  • Features: Photos;
  • Pagination: p. 90-3
  • Serial:
    • Roads and Streets
    • Volume: 115
    • Issue Number: 5
    • Publisher: Donnelley (Reuben H) Corporation

Subject/Index Terms

Filing Info

  • Accession Number: 00233402
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 20 1974 12:00AM