Glazed cement product and method for manufacturing thereof
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United States of America Patent
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Jan 10, 1989
Grant Date -
N/A
app pub date -
Jan 6, 1986
filing date -
Jan 29, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method for manufacturing glazed cement products of a foam light-weight aggregate, reinforcing steel under pretension or a stress-absorbing layer around the reinforcing steel. An action of generating crack, caused by a difference of coefficient of thermal expansion between the reinforcing steel and a portion of cement material while burning and cooling are carried out, is absorbed by the foam light-weight aggregate, the stress-absorbing layer or pretension given to the reinforcing steel. A reaction of unreacted cement component is promoted by the hydration to harden for recovering mechanical strength.
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