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Concrete Formulation Comprising Polymeric Reaction Product of Sulfur/cyclopentadiene Oligomer/dicyclopentadiene.
U S Pat 1982 (4):11 pages
Building, coating, and paving materials with high strength and freeze-thaw resistance are prepared from sulfur cement formulations in which the s cement is a polymeric reaction product of s with the modifiers cyclopentadiene [542-92-7] oligomer (I) and dicyclopentadiene [77-73-6] (II) in which the (I) content is greater than or equal to 37 wt %. The modified s cement was prepared by reacting s, (I), and (II) for 24 h at 130 deg c. Thus, modified s concrete was prepared from limestone 79% and 5 wt % of a 75-25% mixture of (I) and (II) at 140 deg c and was subjected to 300 freeze- thaw cycles. The initial and final modulus of rupture was 1,570 and 1,430 psi, compared with 810 and 285 psi for a concrete formulation based on 76 wt % limestone and no modified s cement. Thus the modified concrete was stronger and retained 91.0% Of its original dynamic modulus compared with 35.2% For the unmodified concrete.
Issue of Publication
U.S. Pat. No. 4,348,313, Sept. 7, 1982; Chem. Abstr. Not Found
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division