Engineering and Contracting . 1^ ?fl> 300 350 ion 500 SfO CoiT or CCMENI AW^GOeeOATe FoeA CUSIC rAHO Of I ? 4 CoNCe£TE Fig. 3. Curve for Determining Cost of 1:2:4 Ht^HtH-t-r PeicEs AssuMep CEM£tJTf/.50 PEB BBL Pit Gravel *.^5 pei cu raCeusHEP Stone^ mScecENim 0eAVEL*.ZOPEecu yo zoo TSO 300 3i0 400 £.50 500 Cost ofMatcbials roe on£ cubic of IZi-5 ConcreteFig. 4. Curve for Determining Cost of 1:2[4:5 Concrete. account of the varying percentages of sand inthe gravel. If the pit run gravel is to be used for mak-ing the concrete for bridge piers or for a pave-ment base, where
Engineering and Contracting . 1^ ?fl> 300 350 ion 500 SfO CoiT or CCMENI AW^GOeeOATe FoeA CUSIC rAHO Of I ? 4 CoNCe£TE Fig. 3. Curve for Determining Cost of 1:2:4 Ht^HtH-t-r PeicEs AssuMep CEM£tJTf/.50 PEB BBL Pit Gravel *.^5 pei cu raCeusHEP Stone^ mScecENim 0eAVEL*.ZOPEecu yo zoo TSO 300 3i0 400 £.50 500 Cost ofMatcbials roe on£ cubic of IZi-5 ConcreteFig. 4. Curve for Determining Cost of 1:2[4:5 Concrete. account of the varying percentages of sand inthe gravel. If the pit run gravel is to be used for mak-ing the concrete for bridge piers or for a pave-ment base, where a mixture of 1 :2% :5 wouldbe specified if crushed stone or screened graveland sand were available, the amount of cementto be used with the pit run gravel would be that must be used, it becomes of considerableimportance to know just what part of themixture shall be called sand. It has becomecommon practice to consider as sand that por-tion of pit run gravel that will pass througha Vi-in. screen, and most plants furnishingsand on a commercial scale have their screensarranged in that way. If, however, the mat- ever, gravels are used in reinforced concretewhere the load
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
