Concrete block additive and improved concrete blocks produced th

Details Concrete block additive and improved concrete blocks produced th Concrete block additive and improved concrete blocks produced th

1984-06-25

1986-02-04

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106DIG4, 106314, 264336, 264DIG43, C04B 702

Patent

active

045683905

ABSTRACT:
An additive used in the production of concrete blocks comprises a mixture of water and sodium bentonite. Problem concrete blocks which previously were normally subject to improper molding or cracking during the molding, unmolding, handling and curing steps during the manufacture thereof, are now easily produced and properly molded without cracking resulting during any of these steps. Whereas, it was previously nearly impossible to manufacture any acceptable concrete blocks without employing sufficient quantities of fines in the concrete block mix, the additive allows formation of acceptable concrete blocks in the absence of any fines at all, thereby enabling much more reliable production of standard blocks, thin-walled blocks, and even more lightweight blocks than heretofore possible, because the gradation and characteristics and relative proportions of the coarse and fine constituents of the aggregate in the mix are rendered far less critical than heretofore. The process of molding concrete blocks is rendered more efficient and quicker by the use of the additive and productivity is considerably increased, because the occurrence of "culls", cracked and defective blocks, is dramatically reduced or eliminated. Also, the process for the formation of concrete blocks is improved by the use of additive in allowing easier and faster packing of the mix into the molds and easier stripping of the molded blocks from the block molds.

REFERENCES:
patent: 1710921 (1929-04-01), Cross et al.
patent: 1885731 (1932-11-01), Kraus
patent: 2526674 (1950-10-01), Larsen
patent: 2876123 (1959-03-01), Drummond
patent: 4230499 (1980-10-01), Nakagawa et al.
patent: 4257814 (1981-03-01), Kellet et al.

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