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What is the specified streangth of cement brics including hollow bricks what is the mixture ratio of cemnt, chips and rock powder for manufacturing cement brics including hollow bricks
Flic flac, bric-a-brac, fric frac; voilà, voilà, Kleinzach!
--Jacques Offenbach
I suggest that you go visit the National Concrete Masonry Association (in the USA):
www.ncma.org/
Are these foot pound second bricks, or some other type?