San Francisco : Architect and Engineer, Inc · leaf 309
. The less water used, the better the qual-ity of the concrete, providing it can be compactedproperly. Smaller amounts of mixing water re-quire either richer or stiffer mixtures. With vibra-tion the stiffer mixtures can be used. Concrete ofbetter quality can, therefore, be made with a givenamount… … BRIDGE CROSSING ARROYO SECOPasadena, California Benefits oJ Placing Portland CementConcrete by Vibration If a concrete mixture is of such workability thatit can be readily placed by hand puddling, thereis no advantage of vibrating it. Such mixtures willusually segregate when vibrated. Only by…
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