Masonry cement composition, masonry construction and method
AssigneesAmerican Colloid Company, United Cement Co.
InventorsPeter L. Maul, Albert E. Robertson
Life of this patent
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Abstract
A masonry cement is prepared by dry mixing portland cement, diatomaceous earth and a water-swellable colloidal clay, such as bentonite. Accordingly, the crushed limestone and other ingredients previously included in masonry cements for admixture with portland cement can be completely eliminated and substituted by diatomacious earth and water-swellable colloidal clay. In this manner, a combination of less than about 10% by weight of a combination of diatomaceous earth and colloidal clay replaces approximately 50% by weight crushed limestone and other ingredients from prior art masonry cement compositions while providing a masonry cement which meets ASTM specifications, particularly for air entrainment, water retention and compressive strength.
Claims18
A masonry cement composition comprising Portland cement, about 0.05% to about 0.8% by weight diatomaceous earth and about 5% to about 16% by weight colloidal clay.
A masonry cement composition consisting essentially of 75-95% by weight Portland cement;
- 0.05-0.8% by weight diatomaceous earth and 5-16% by weight water swellable colloidal clay.
A method of masonry construction comprising mixing sand and water into a dry masonry cement composition to form a mortar, and applying a layer of said mortar onto a surface of a first masonry building member and disposing a secondary masonry building member in contact with said mortar layer to sandwich said mortar layer between said first and second building members thereby to structurally secure said first and second building members together, said masonry cement composition comprising Portland cement, about 0.05% to about 0.8% by weight diatomaceous earth and about 5% to about 16% by weight water swellable colloidal clay.
A method of manufacturing a masonry cement composition comprising dry blending a composition comprising Portland cement, 0.05% to 0.8% by weight diatomaceous earth and 5% to 16% water swellable colloidal clay.
Dependencies are inferred from the claim text.