Properties of cements mixed from liquids with altered water content

The water content of the liquids of silicate, zinc phosphate, and silicophosphate cements was altered within the range of plus 10 to minus 10 per cent. Tests were run on the cements mixed from these liquids and the results of these tests compared with data obtained by testing cements mixed from the unaltered liquids. The following observations are made: 1. The setting times of zinc phosphate and silicophosphate cements are increased with increases in water of the liquids whereas the setting time of silicate cements is increased by a decrease in the water content of these liquids. 2. Cements mixed with liquids having altered water content have reduced physical properties, such as a marked reduction in abrasion resistance and increased solubility. 3. The results of the investigation emphasize protection of cement liquids from alteration in water content in order to maintain maximum physical properties of the cement mixes.