Example 4
The specific gravity of portland cement is 3.1. The specific gravity of pozzolans varies from 2.05 to 2.65. Table 6 below shows the specific gravity for portland cement, hyaloclastite, pumice, dacite, rhyolite, fly ash, matakaolin and nano silica.
When pozzolans are used to replace portland cement, the ratio of replacement takes into consideration specific gravity. Since all pozzolans have a lower specific gravity than portland cement, the pozzolan's replacement weight must be adjusted according to the difference in the density. Accordingly, known pozzolan replacement ratios are often greater than 1 and sometimes as high as 1.3. Hyaloclastite in accordance with the present invention has a specific gravity of 2.90-3.0. Therefore, the replacement ratio of hyaloclastite in accordance with the present invention for portland cement can be one-to-one, thereby saving material and costs.
