e innerface and both edges of the lumber should be dressed to insure a smoothfinish on the exposed surface of the concrete and prevent ridges due tolack of uniformity in thickness of lumber. When the edges of the boardsare not dressed, it is impossible to fit them closely together, thus per-mitting… … UNIVERSAL PORTLAND CEMENT CO. just before using again, it is advisable to treat or dress the face of the formwith soap, paraffine or oil to prevent the mortar from adhering. The weather has a decided effect upon the rate of hardening of con-crete, thus a direct influence upon the time which the…
Bridges · Concrete · Culverts
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