138 



ENGINEERING ON THE FARM 



Volume of Concrete from 4 Sacks of Cement — 



3.8 Cubic Feet 



Cement 



Proportions by Volume 

 Sand 



I 

 2 



3 



4 



Stone 



4 



5 

 6 

 8 



Quantities 



Cu. Ft. 



10. o 



173 



20.8 



24 -3 

 3i-7 



Cu. Yd. 



37 

 64 



77 

 90 



17 



Volume of Mortar from 4 Sacks of Cement — 

 3.8 Cubic Feet 



1 : 1 : 2 Y 2 or 1 : 1 Y2 : 3 



1 : 2 : 3 or 1 : 2 : 4 . . 



1:2)^:4 or 1:2^:5 



1: 3: 5 or 1: 3:6. 



1: 4: 8 



l:lM 



1:2 



Table of Mixtures 



. . . Small work requiring strength and imper- 

 meability 



. . .One-course floors, walks, barnyards, pave- 

 ments, roofs, fence posts, sills and lintels 

 without mortar surface, water troughs 

 and tanks, and large machinery founda- 

 tions 



. . . Building walls above foundations, silo walls, 

 base of two-course sidewalks and pave- 

 ment blocks 



. . . Basement walls and foundations, small 

 machinery foundations, base of sidewalks 

 and two-course floors, mass footings 



. . . Large masses, not much strength 



. . .Wearing course of two-course floors 



. . . Scratch coat of exterior plaster, masonry 

 mortar, wearing course of two-course 

 walks, street pavements, barnyard pave- 

 ments 



