Process for preparing hydraulic binding materials of high bonding capacity from glassy pyrogenic rocks
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United States of America Patent
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Feb 12, 1980
Grant Date -
N/A
app pub date -
Apr 13, 1978
filing date -
Apr 15, 1977
priority date (Note) -
Expired
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Abstract
There is disclosed a process for preparing hydraulic binding materials having a high bonding capacity, starting from glassy pyrogenic rocks. According to the invention glassy pyrogenic rocks are mechanically activated by grinding. The activation time is 0.5 to 36 hours, preferably 4 to 12 hours, and the mechanical stress applied is higher than in case of the conventional fine grinding. The activated product is thereafter admixed with one or both of lime and cement.
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