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Concrete production and drought

136 bytes added, 23:25, 4 June 2012
→‎Construction, operations and maintenance
==Construction, operations and maintenance==
[[Image:concrete graph.jpg|thumb|right|300px|Concrete strength with curing Neville, A.M. (1981) Properties of Concrete. Pitman.]]'''All dry ingredients should be mixed first before adding water.'''
* Use the correct ratios for different applications – refer to relevant tables. A field method to check if contractors have used the correct ratio is to take some of the wet mix, put it into a transparent bottle and shake up with some water – the cement fraction should settle out on top when it is left to stand, giving an indication of the cement fraction.
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