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عمران::
الاستومری
Cases showing the effect of shape on the maximum strains 'S' which occur on the parabolic exposed surface of elastomeric sealants.
Some devices may be nosed or bedded in elastomeric concrete, e.g.
For many applications these traditional materials did not perform well and in recent years there has been active de- velopment of many types of "elastomeric" sealants whose behavior is largely elastic rather than plastic and which are flexible rather than rigid at normal service temperatures.
Elastomeric materials are available as field molded and pre- formed sealants.
Their cost is somewhat less than that of other elastomeric sealants and their service life is considered adequate.
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