APPENDIX. 



PHYSICAL TESTS OF OIL-MEED PORTLAND-CEMENT CONCRETE. 



In order to investigate the physical properties of oil-mixed Port- 

 land-cement concrete, the following physical tests were conducted in 

 the testing laboratory of the Office of Public Roads: (1) Tensile 

 strength, (2) crushing strength, (3) time of setting, (4) toughness or 

 resistance to impact, (5) stiffness or modulus of elasticity, (6) absorp- 

 tion, (7) permeability, and (8) bond tests. 



£ffect of O/l oh Tens/le 

 Strength of /-3 Mortar 

 _ (Ottawa Sa/ygJ 



Age. 

 7 Days 



28D*ys. 



6 Mo/fTHS. 



/ Year. 

 2 Years 



~L=kd 











S~ 









y 









Oil 



No. 6464 





Per cent of oil. 

 Fig. 1.— Effect of oil on tensile strength of 1 : 3 mortar. 



The materials used consisted of Portland cement, river sand, 

 crusher-run gneiss, river gravel, and various kinds of petroleum 

 residuum oils. 



The mechanical analysis of the sand, stone, and gravel used is 

 given below: 



Table 3. — Mechanical analysis of sand, stone, and gravel. 



1G 



Sand. 



Stone. 



Gravel. 



Sieve 

 No. 



Per cent 

 retained. 



Sieve 

 No. 



Per cent 

 retained. 



Sieve 

 No. 



Per cent 

 retained. 



} inch 

 I inch 

 10 

 20 

 30 

 40 

 60 

 80 

 100 



■A 

 11 

 17 

 42 

 66 

 87 

 93 

 96 

 99 



Inch. 

 i 

 i 



28.4 

 66.3 

 92.1 

 9S.4 



Inch. 

 1 



3 



J 



1 



I 



4.2 



8.4 



30.2 



80.2 



97.7 



