Title:
Crack Control in Portland Cement Plaster Panels
Author(s):
Bert A. Hall
Publication:
Journal Proceedings
Volume:
44
Issue:
10
Appears on pages(s):
129-140
Keywords:
none
DOI:
10.14359/8784
Date:
10/1/1947
Abstract:
Desirability of using portland cement plaster for surfaces exposed to water spray and condensation impelled Bureau of Reclamation studies of cause and control of its cracking. Tests indicated shrinkage to be the chief factor in cracking of portland cement plaster. Method of application described eliminates restraint at all edges of the plaster slab, allowing shrinkage to take place without stress development and the attendant cracking. Savings are effected by application of successive plaster coats at 24-hr in-tervals, damp-curing of individual coats is eliminated, and the final curing period is shortened by careful control.