Sulfur cement-aggregate-organosilane compositions and methods for preparing
AssigneeChevron Research Company
InventorsEdward L. Nimer, Robert W. Campbell
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Abstract
Sulfur cement-aggregate compositions comprising a sulfur cement and an aggregate containing an expansive clay and processes for preparing such compositions. The processes, and resulting compositions, are characterized by the addition of certain organosilanes in the composition prior to solidifying (cooling) the composition. The resulting solidified composition has improved water stability. The compositions can be used as mortars or concretes depending on the particle size of the principal aggregate component.
Claims18
A composition which comprises sulfur cement and an aggregate which is contaminated with about from 1 up to 5 percent by weight of expansive clay based on the total weight of said aggregate, and an amount of an organosilane in the range of about from 0.027 to 0.15 weight percent, based on the total weight of said aggregate, effective to substantially reduce the water expandability of said expansive clay and wherein said organosilane has at least one molten-sulfur reactive group.
A process for preparing a sulfur cement-aggregate composition which comprises admixing a molten-sulfur cement with an aggregate which is contaminated with about from 1 up to 5 percent by weight of expansive clay, and admixing an organosilane having at least one molten-sulfur reactive group with said composition prior to solidifying said composition and wherein an amount of said organosilane in the range of about from 0.027 to 0.15 weight percent, based on the total weight of said aggregate, effective to substantially improve the water stability of said composition is used.
Dependencies are inferred from the claim text.