Show MAKING PIECE OF CONCRETE idaho agricultural engineer gives information regarding materials that are ara necessary ur IS W HAMILTON agricultural engineer idaho experiment station many times it la is puzzling to got get at the tt mounts of cement sand band and gravel to make a piece of concrete at bich bu ch times the following rule will furnish the desired information to find the number ot of sacks backs of cement to make maka a yard of concrete divide 40 by the number of parts in the Inix mixture ture thus tor for a 1 2 4 mix the number of oc sacks of cement will be ba 40 divided by 7 or 67 57 to find cubic feet of sand multiply number of sacks backs of cement by parts of sand or ax 7 or similarly the number of sacks of gravel will bo be or it if only gravel had been used the method would have been the same A 12 1 2 mix would require isacks backs of cement and cubic feet of sand band for a yard of oc concrete |