An Evaluation of Trinity River Aggregates of Marginal Quality for Use in Portland Cement Concrete Pavements

Details

• Creators:
  Jones Jr, Truman R. ; Hirsch, T. J.
• Corporate Creators:
  Texas Transportation Institute. Texas A&M University
• Corporate Contributors:
  Texas Highway Department
• Subject/TRT Terms:
  • Evaluation
  • Aggregates
  • Quality control
  • Portland cement concrete
  • Pavements
  • Hazards
  • Modulus of elasticity
• Publication/ Report Number:
  RP-12
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Texas
• Edition:
  Final Report
• Corporate Publisher:
  Texas Transportation Institute. Texas A&M University
• Abstract:
  For many years the Trinity River sand and gravel deposits in the vicinity of Dallas have provided aggregates of excellent quality suitable for making structural concrete of the highest type. Unfortunately, these deposits are being rapidly exhausted. In the same general area, however, there is a large potential supply of concrete aggregates which by certain standards are considered to be of marginal or sub-standard quality. Much of this aggregate, as now produced, passes all the current Texas Highway Department specifications for concrete aggregate. However, pavement concrete made with the aggregate from certain pits will not develop the minimum modulus of rupture (beam-break strength) of 650 psi, as required by the specifications, at normal cement factors. Aggregates from some of the other pits produce marginal strengths and frequently fail to pass. It was the purpose of this investigation to evaluate these materials that produce concrete of marginal and sub-standard quality to determine the causes for the poor performance and to develop methods for the detection and control of such deleterious material as may be present.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/86444/dot_86444_DS1.pdf
• File Type:
  [PDF - 1.87 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:47504d454b91db7d195fcffa90d726b003a11d0cd04451ec5efa8a7af94166bbf4d6123862696bd39d88c0d0dcab2a517c624953e8895b013901b6e7e598fde3