SLIPFORMER SETS 1000-YPH PACE

RUNWAYS TOTALING OVER 30,000 FEET IN LENGTH AT THE DALLAS/FORT WORTH REGIONAL AIRPORT ARE BEING LAID BY A SLIPFORM PAVER THAT PUTS DOWN A 50-FOOT SLAB WITH A DEPTH UP TO 17 INCHES. A SPREADER FLATTENS AND DISTRIBUTES PILES OF MUD DUMPED ON THE GRADE BY A FLEET OF 10-YARD HAULERS. GRADE CONTROLS ARE ELECTRIC OVER HYDRAULIC AND RESPOND TO STRINGLINE SENSORS. THE AUTOMATIC GUIDANCE SYSTEMS USES TOW STRINGLINES: ONE SIDE CONTROLS ALIGNMENT, WHILE THE OTHER SIDE SETS GRADE. THE SPREADER TOPS OFF A 12-INCH-THICK LIFT AT PRECISE GRADE FOR PLACEMENT OF 25 X 50-FOOT, 2300- LB REINFORCING MATS. THE MATS ARE SPOTTED WITH THE AID A TRUCK CRANE FITTED WITH SPECIAL RIDING FLOATS TO GET STABILITY FOR THE LONG REACH. OF SEVERAL APPROACHES TO ASSURE FULL KEYING OF THE REINFORCING INTO THE BOTTOM COURSE, THE MOST SUCCESSFUL WAS MAKING SEVERAL PASSES OVER EACH MAT WITH A VIBRATORY COMPCTOR.

• Authors:
  • Rehfield, J
• Publication Date: 1972-10

Media Info

• Features: Photos;
• Pagination: p. 68-70
• Serial:
  • Construction Equipment
  • Volume: 46
  • Issue Number: 4

Subject/Index Terms

• TRT Terms: Airport runways; Automatic control; Concrete placing; Construction equipment; Slip form paving; Width
• Subject Areas: Construction; Highways; Pavements;

Filing Info

• Accession Number: 00215599
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 30 1973 12:00AM