| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a permanent form for cement mortar using a burst resistant cement mortar for solving the problem of the conventional cement mortar that it bursts by receiving thermal stress caused by abrupt heating, for example the surface temperature is abruptly raised to 700°C. <P>SOLUTION: The permanent form for cement mortar comprises the burst resistant cement mortar which formulates a cement, water, cellulose fiber, fine aggregate, and, if needed, a variety of additives, and which has a water cement ratio of 40-75%. In the burst resistant cement mortar, even when abruptly heated and received thermal stress, the steam pressure generated from internal moisture 3 in the cement mortar distributes in the arrow mark 6 direction via an escape way formed by e.g. carbonized cellulose fiber 5' so as to prevent the cement mortar from being bursted from the inside thereof. <P>COPYRIGHT: (C)2012,JPO&INPIT |
