Miracle concrete: the great modern industry (1909)
Miracle Pressed Stone Co. · Miracle Pressed Stone Co. · leaf 12
ntinuousspray play on the blocks. This will insure an even cure. Watershould be applied for at least seven days, or until they willabsorb no more moisture. It is then desired that they curefourteen to twenty-one days more before using. Here is wheremany contractors, who may be in a hurry to… … Illustration No, 3—Floating Off. They can just as well be kept in the open, and a gooa supplyoften helps to close a large contract. On page 1 3 see Standard Specifications for the making ofHollow Concrete Blocks as compiled by the Special Committeefor the National Association of Concrete Block…
