Method of producing concrete
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United States of America Patent
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-
Jan 3, 1989
Grant Date -
N/A
app pub date -
Feb 12, 1985
filing date -
Feb 13, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fine aggregate is stored in a high storage silo and its surface water content is so controlled that its variation may be kept within .+-.1% by weight. The fine aggregate, cement and primary water containing an air entraining agent are mixed in an upper mixer (primary mixing) to prepare mortar. The mortar, a coarse aggregate and secondary water containing a water reducing agent are mixed in a lower mixer (secondary mixing) to produce mixed concrete.
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