DISCUSSION OF REPORT OF COMMITTEE ON CHARACTER AND USE OF ROAD MATERIALS

AN EXTENSIVE INVESTIGATION WAS MADE OF ALUMINATE CEMENT IN THE LABORATORY. THE CYLINDERS WERE CURED IN MOIST AIR AND 24 HOUR STRENGTHS WERE COMPARED. TESTS SHOWED THAT A PEAKING OF STRENGTH AT THE END OF A FEW DAYS SEEMS TO BE CHARACTERISTIC OF ALL PLOTTED COMPRESSION TESTS OF BOTH CONCRETE AND MORTAR. IN THE MAJORITY OF CASES THE FRACTURE WAS THROUGH THE AGGREGATE EVEN AT VERY EARLY PERIODS, SO THAT IT IS POSSIBLE THAT WITH VERY STRONG AGGREGATES THE COMPRESSIVE STRENGTH OF THE CONCRETE WOULD BE HIGHER. DUE TO THE HIGH COST OF ALUMINATE CEMENT THE POSSIBILITY OF MIXING IT WITH PORTLAND CEMENT WAS MENTIONED. THE DIFFICULTY WITH THIS IS OBTAINING A UNIFORM MIXTURE. THE BOND WAS INVESTIGATED BETWEEN FRESH ALUMINATE CEMENT CONCRETE AND OLD PORTLAND CEMENT CONCRETE. RESULTS INDICATE THAT A GOOD BOND IS EASILY OBTAINED AND THE STRENGTH OF THE BOND WILL BE INCREASED BY PAINTING THE CONCRETE WITH NEAT ALUMINATE CEMENT. PATCHING WAS SUCCESFULLY CONDUCTED WITH ALUMINATE CEMENT IN CONCRETE PAVEMENTS IN MICHIGAN. THE WEST RESULTS ARE OBTAINED WHEN NO EARTH OR OTHER COVERING IS APPLIED, THUS GIVING OPPORTUNITY FOR THE DISSIPATION OF HEAT. NO FAILURES OCCURRED WHERE THE CONCRETE WAS CURED BY THE SPRINKLING ONLY.

  • Supplemental Notes:
    • Vol 5, Pt1, PP 185-187, 1 FIG, 1 TAB
  • Authors:
    • Morrison, R L
  • Publication Date: 1926

Media Info

  • Monograph Title: Proceedings of the Fifth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 3-4, 1925. Part I: Reports of Research Committees and of Special Investigations
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00213729
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Nov 9 1970 12:00AM