Fred T. Hodgson · Frederick J. Drake and Co. · leaf 503
is that the volume of mixed concrete is HOW TO USE THEM 499 equal to the volume of the stone plus one-half to one-third the volume of sand. There has been much discussion among engineersand others as to the amount of water that should beadded to the aggregates and cement for making thebest… … Fig. 46. the concrete was in the form and tamped, it wouldshow moisture on -the surface. The tamping is a veryimportant part of the operation, and the quality ofthe work is dependent upon how well this is super-intended, as unless it is well and thoroughly done theconcrete is liable to be…
