The performance of black base and flexible base pavements in five of the Texas Highway Department's twenty-five is discussed in both general terms and by comparing performance based on road roughness measurements and by the utilization of a formal roadway maintenance evalution system. Traffic load associated cracking is nearly non-existent on the fifty-four black base pavement sections surveyed in the climatic extremes of Texas. The amount of transverse and longitudinal cracking which often form a "large block" cracking pattern typical of the West Texas area can be reduced by the use of black bases rather than the conventional flexible base pavements. Swelling clay problems have not, however, been solved by the use of black base. The recent escalation in the price of bituminous treated materials has increased the necessity to explore the use of other binder and aggregate systems than those conventionally utilized in black base. The types of materials utilized for black bases in Texas are discussed together with their thicknesses.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 13-20
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00138803
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 16 1976 12:00AM