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US 5,173,117 AGranted
Additives for roller compacted concrete pavement
AssigneeSumitomo Cement Co., Ltd.
InventorsHisashi Inokawa, Kiyohiko Uchida, Kazuo Inada, Noriyuki Kozakai
Life of this patent
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Abstract
An additive for roller compacted concrete pavement which controls the heat of hydration, prevents the reduction of packing of the pavement and prevents thermal cracking of the dried end product. The additive is a hydrolyzable tannin compound used alone or in conjunction with a surface active agent.
Claims4
An additive composition for use in roller compacted concrete pavement comprising:
- a hydrolyzable tannin compound as an active ingredient;
- and a surface active agent selected from the group consisting of polyoxyethylene alkyl allyl ether, alkyl sulfate, dialkyl sulfosuccinate or propylene glycolethylene glycol block copolymer wherein said composition contains 1 to 99 percent by weight of said hydrolyzable tannin compound and 1 to 99 percent by weight of said surface active agent.
Dependencies are inferred from the claim text.