An Improved Setting for Cements used for Constructive and other purposes including Portland, Roman and other Cements and Concrete or Mixtures in which Cements for Constructive and other purposes are used.

摘要

5659. Wright, W. March 26. Cements ; concretes ; stone, artificial.-Relates to the improvement of the setting and working qualities of Roman, Portland, and other cements, and concretes or artificial stone compositions &c. prepared therefrom, especially those containing chalk, such compositions being applicable for building or paving bricks and slabs, window sills, &c. For the above purpose, carbonate of potash or other alkali is mixed with the water used in the preparation of the cement. Sulphur may be combined with a strong alkali, and the material may be hardened after setting by the application of sulphuric acid.