The book Notes On Concrete And Works in Concrete was written by author Newman, John B Here you can read free online of Notes On Concrete And Works in Concrete book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Notes On Concrete And Works in Concrete a good or bad book?
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Mr. Bamber made some experiments with concrete blocks placed in the sea, and found that when 4 gallons of water were used to a cubic foot of cement the concrete was perfectly sound and hard, but when 2 gallons only were used it was soft, rotten, and wet under the same conditions, and that when 3' 13 gallons were used, the Digitized by Google Mixing Concrete. 121 concrete was satisfactory^ but with 2 • 35 gallons it was unsound, and with only 1*56 gallons it became disin- tegrated* In order to m...ake durable and sound concrete, it may be generally considered that about 4 gallons, or 40 lbs. by weight, for every cubic foot, which equals 0-781 bushel, of the Portland cement used in a cubic yard of concrete, subject to additions for the reasons mentioned in this chapter, so that the quantity supplied for the cement may be entirely reserved for it, is neces- sary. M. Feret in a series of experiments, which confirm others, found that the best quantity of water to use varies according to the cement and aggregates, and tliat if the quantity of water used in mixing was progressively diminished, the permeability of the mortars or concrete produced increased very rapidly.
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