发明名称 |
Directed cracking in concrete panel manufacture |
摘要 |
A method of manufacture in which the formation of unsightly stress cracks in sandwich-like panels of prestressed concrete are prevented by the formation of a "contraction joint" at selected locations in the panel's outer layer of concrete during its manufacture.
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申请公布号 |
US4416842(A) |
申请公布日期 |
1983.11.22 |
申请号 |
US19810239330 |
申请日期 |
1981.03.02 |
申请人 |
FABCON, INC. |
发明人 |
NASH, RICHARD C.;DUFFY, TERRANCE W. |
分类号 |
B28B11/08;B28B11/16;B28B19/00;(IPC1-7):B28D1/26 |
主分类号 |
B28B11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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