发明授权
US4743301A Concrete composition for underwater use 失效
用于水下使用的混凝土组成

Concrete composition for underwater use
摘要:
A concrete composition for underwater use contains about 0.1 to 4% by weight based on cement content of a water soluble vinyl polymer containing vinyl units having sulfonic groups. The concrete composition is easy to mix and prevents separation of concrete composition constituents as it is laid under water.
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