REVIEW OF A NUMBER OF ROAD PRIMING EXPERIMENTS CARRIED OUT BETWEEN AUGUST 1961 AND MARCH 1964

THE EFFECT OF PRIMING ROAD BASES IS DISCUSSED GENERALLY. THE PERFORMANCE IN ROAD EXPERIMENTS OF THE DIFFERENT TYPES OF PRIME USED IN SOUTH AFRICA FOR PRIMING ROAD BASES IS DESCRIBED. THE PRIMES INCLUDE HIGH-TEMPERATURE COKE-OVEN TAR PRIMES, A LOW-TEMPERATURE TAR PRIME, CUT-BACK BITUMENS, AND THE TAR PRIMES PRODUCED AS BY-PRODUCTS DURING THE MANUFACTURE OF COAL GAS. THE PRIMES WERE TESTED UNDER TYPICAL HIGHVELD WINTER AND SUMMER CONDITIONS ON THE TYPES OF BASE COMMONLY USED IN ROAD CONSTRUCTION, VIZ DENSE CRUSHER-RUN AND DENSE CEMENT-STABILIZED GRAVEL. THE DEPTH TO WHICH THE PRIMES PENETRATED THE BASES, THEIR DRYING TIMES, THE EXTENT TO WHICH PRIMING REDUCED THE PERMEABILITY OF THE BASE, AND THE ABILITY OF THE DIFFERENT PRIMES TO PREVENT DISINTEGRATION OF THE BASE UNDER LIGHT TRAFFIC WERE TESTED. THE EFFECT OF THE OMISSION OF THE PRIME COAT ON THE PERFORMANCE OF SINGLE AND DOUBLE SEAL SURFACINGS ON A LIMITED NUMBER OF SECTIONS IN A BITUMINOUS ROAD SURFACING EXPERIMENT WAS ALSO TESTED. EACH EXPERIMENT IS DESCRIBED BRIEFLY, THE RESULTS OF THE TESTS ARE GIVEN, AND A COMPREHENSIVE SUMMARY OF THE WORK IS INCLUDED. /AUTHOR/

• Supplemental Notes:
  • No 256, 24 PP, 9 FIG, 8 TAB, 9 REF
• Publication Date: 1967

Media Info

• Serial:
  • Csir Research Reports /South Africa/

Subject/Index Terms

• TRT Terms: Base course (Pavements); Bituminous materials; Coal gas; Coking; Construction; Drying rate; Experiments; Fracture mechanics; High temperature; Liquid asphalt; Low temperature; Pendulum tests; Permeability; Primers; Roads; Surfacing; Traffic; Waste products (Materials)
• Uncontrolled Terms: Prime coats
• Old TRIS Terms: Bases; Cut back; Disintegration; Priming; Test results
• Subject Areas: Construction; Highways; Materials; Operations and Traffic Management;

Filing Info

• Accession Number: 00210707
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 24 1994 12:00AM