FIBROUS CONCRETE PLACED 3-IN. THICK IN URBAN HIGHWAY TEST

TO DEMONSTRATE THE FEASIBILITY OF PLACING FIBROUS CONCRETE PAVEMENT WITH CONVENTIONAL 24 FT. WIDE PAVEMENT EQUIPMENT, 3 IN. THICK FIBROUS CONCRETE OVERLAY WAS PLACED ON AN 1100 - FT LENGTH OF 8 LANE DIVIDED THOROUGHFARE WITH AN AVERAGE DAILY TRAFFIC COUNT OF 100,000 VEHICLES INCLUDING 18 PERCENT COMMERCIAL UNITS. THE RAPID STRENGTH GAIN OF FIBROUS CONCRETE, A PAVING SCHEDULE WAS SET TO RESURFACE TWO LANES WHILE TRAFFIC WAS MAINTAINED ON THE OTHER TWO LANES. PAVING WAS DONE BETWEEN PEAK TRAFFIC PERIODS. THE FIBROUS CONCRETE WAS DESIGNED TO PRODUCE A FLEXURAL STRENGTH OF 645 PSI IN 24 HR. AND 920 PSI IN 48 HOURS. THIS WAS CONSIDERED SUFFICIENT TO ALLOW TRAFFIC ON THE NEW CONCRETE ON THE SECOND DAY. A CUBIC YARD OF FIBROUS CONCRETE WAS MADE UP OF 850 LB. OF CEMENT, 906 LB. OF 1/2 IN. MAXIMUM SIZE SLAG AS COARSE AGGREGATE AND 1570 LB. OF WATER. AIRENTRAINING, WATER-REDUCING ADMIXTURES AND FLAT STEEL FIBERS WERE ADDED TO PRODUCE AN AIR-CONTENT OF 7 PERCENT AND A 4 IN. SLUMP. PROCEDURAL DETAILS AND PROBLEMS ENCOUNTERED IN PRACTICE ARE DISCUSSED. SURFACE PREPARATION OF THE OLD PAVEMENT IS DESCRIBED. THE COORDINATION OF ALL FACETS OF CONSTRUCTION IS REVIEWED.

• Supplemental Notes:
  • VOL 116 NO 2 PP 59,62
• Publication Date: 1973-2

Media Info

• Serial:
  • Roads and Streets
  • Volume: 116
  • Issue Number: 2
  • Publisher: Donnelley (Reuben H) Corporation

Subject/Index Terms

• TRT Terms: Aggregates; Air content; Concrete pavements; Fibers; Flexural strength; Overlays (Pavements); Slag coarse aggregates; Steel; Testing; Urban highways
• Old TRIS Terms: Steel constituents
• Subject Areas: Construction; Geotechnology; Highways;

Filing Info

• Accession Number: 00215632
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 9 1973 12:00AM