A new method of manufacturing lime-sand concrete and bricks, pipes and the like made thereof for building and all other purposes

摘要

222,923. Caccia, R. July 3, 1923. Concretes.-Lime-sand concretes are improved by adding to the. ingredients a small proportion of dilute sulphuric acid, which enables a lower proportion of lime than usual to be employed. Coal tar or other tar may also be added to render the mixture less hygroscopic. An example of a composition suitable for external walls is :-1 cubic yard of sand, 180 lb. of lime, 2“ lb. of sulphuric acid (diluted 20 times with water), and 2 oz. of tar dissolved in fuel oil.