A process for imparting to mortar, cement, concrete and the like complete imperviousness, a considerably increased adhering power and the property of setting extra-ordinarily quickly

摘要

170,260. Winkler, K. Oct. 15, 1920, [Convention date]. Cements, treating after manufacture; concretes and mortars.-Mortar, cement, and concrete are rendered waterproof and quicksetting. and their hardness and adhering power are increased, by being gauged with potassium hydroxide solution of 10-12 BÚ. or of 36-40 BÚ. Alternatively, the solution may be made from a mixture of potassium and sodium hydroxides containing about 2-7 per cent of the latter substance. The action of the solution may be reinforced by the addition cf 5 per cent of coke of tar, 1¢-3 per cent of sugar or alkali salts such as Stassfurt salts, or 15 per cent of manganese dioxide, or mixtures of these. These additional substances may be mixed with the solution or with the dry lime, lime-sand mixture, cement, or concrete mixture. According to the original form of the Specification, as open to inspection under Sect. 91 (3) (a), the gauging-liquid may be a solution of potassium or sodium hydroxide or a mixture of these having a density of 10-45‹ BÚ. This subject-matter does not appear in the Specification as' accepted.