Research to overcome the problems associated with stress formation in sulphur concrete showed that adding small amounts of dicyclopentadien (DCPD) or dipentent (DP) to sulphur prevented cracking of sulphur coating. To determine optimum conditions for preparing modified sulphur concretes, a large number of standard cylindrical test samples were prepared using a wide range of coarse and fine aggregates and varying amounts of DCPD or a mixture of DCPD and DP. The optimum amount of sulphur ranged from 20 to 38 percent depending on the aggregate and modifier (DCPD and DP) used. A total of 56 different sulphur concrete mixtures were tested for their durability to aging under dry and humid conditions. Use of modified sulphur also improved the resistance of sulphur concretes to freeze-thaw cycles. Studies under field conditions have demonstrated the success of modified sulphur work has demonstrated that the resistance of sulphur concretes to weathering and temperature fluctuations can be greatly improved by reacting the sulphur with from 2-5 percent DCPD, alone or in combination with 1/2-1 percent DP. The compressive strength of sulphur concretes can be tailored to required specifications by appropriate choice of aggregates and mix design. The flexural strength of modified sulphur concretes ranged from 18-25 percent of the compressive strength compared to 10-25 percent for straight sulphur and Portland cement concretes.

  • Corporate Authors:

    Sulphur Institute

    1725 K Street, NW
    Washington, DC  United States  20006
  • Authors:
    • Sullivan, T A
    • McBee, W C
  • Publication Date: 1976-3

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Filing Info

  • Accession Number: 00141080
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 6 1976 12:00AM