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Show MAKING PIECE OF CONCRETE Idaho Agricultural Engineer Gives Information In-formation Regarding Materials That Are Necessary. (By E. W. HAMILTON, Agricultural Engineer, Idaho Experiment Station.) Many times it is puzzling to get at the amounts of cement, sand and gravel to make a piece of concrete. At such times the following rule will furnish the desired information. To find the number of sacks of cement to make a yard of concrete, divide 40 by the number of "parts" in the mixture; thus, for a 1-2-4 mix the number of sacks of cement will be 40 divided by 7 or 5.7. To find cubic feet of sand multiply number of sacks of cement by "parts" of sand or 2x5.7 or 11.4. Similarly the number of sacks of gravel will be 4x5.7 or 22.8. If only gravel had been used the method would have been the same. A 1-2 mix would require re-quire 13.3 sacks of cement and 26.6 cubic feet of sand for a yard of concrete. |