STRENGTH AND ELASTICITY OF REINFORCED CONCRETE. 



183 



TABLE IV.b— COMPRESSION TESTS OF CONCRETE PRISMS. 

 Length 24 inches ; Cross Section 6 inches x 6 inches. 







™l 



3 o 



J o ft 



I 



1 



CO 



i! 



6 





Composition 



Q 



ft O £ 



2 ft-S 



•iig 



thai 



efficient c 

 ticity in 

 of poun 

 square in 



1= 



o 

 H 



'3 



Is 



.3 3rd 



o 



IS 



1 



1 



3 

 1 





< 



<5 



O 



a 



H 



« 



« 



« 













X JU<5 









1 



2 



3 



4 



5 



6 



7 



8 



9 



1 cement, 2 sand, 



84 



373 



253 



2-344 



2-600 



1833 



IV.bl 



Shattered vertically, 



2 f in. shivers 





747 

 1120 



6-97 

 12-55 



1-975 

 1-790 



2-285 

 2-012 







about 7 in. left sound 

 at one end. Kept in 

 air till tested. 



1 cement, 2 sand, 



77 



373 



2-80 



1-762 



2-347 



1202 



IV.b 2 



Shattered vertically 



3 f in. shivers 





747 

 1120 



10-04 

 29-68 



•888 

 •362 



1-587 

 •851 







in centre.; 



Ditto 



78 



373 



2-50 



1-756 



2-630 



1462 



IV.b3 



Broke through the 







747 



7-79 



2-710 



2-042 







centre, leaving ends 

 sound. 







1120 



14-24 



•500 



1-775 







Ditto 



84 



373 



2-41 



2-530 



2-728 



1742 



IV.b 4 



Broke through the 







747 



6-87 



1-875 



2-316 







centre and one end 







1120 



13-28 



1-625 



1-900 







left sound for 6 in. 

 from end. The rest 







1493 



25-23 



•422 



1-370 







shattered vertically. 



1 cement, 2 grit 



78 



373 



2-83 



2-220 



2-323 



1741 



IV.b 5 



Broke through the 



with dust 





747 

 1120 



7-97 

 16-04 



1-600 

 1-157 



1-996 

 1-575 







centre, both ends 

 sound for 6 inches. 



Ditto 



81 



373 



3-39 



1-772 



1-938 



1408 



IV.b 6 



Broke near the top, 







747 



9-81 



1-280 



1-624 







other end sound for 







1120 



20-45 



•913 



1-235 







about 12 inches. 



1 cement, 2 fine 



82 



373 



1-70 



3-190 



3-868 



2427 



IV.cl 



Shattered in centre, 



Nepean sand, 2 





747 



5-07 



2-488 



3-142 







vertical rods bent ; 



off in. Nepean 





1120 



9-55 



1-740 



2-645 







concrete thrown off 

 from outside of bars. 



shivers ; 4 bars 





1493 



15-95 



1-305 



2-165 







Ends left sound. 



• « 



fin. iron, 15 





. 















• • 



ties vWin. iron 



















Mixture ditto, 4 



63 



373 



2-06 



2-860 



3-192 



2171 



IV.c2 



Ditto 



bars fin. iron, 





747 



5-81 



2-260 



2-740 









10 ties -^ in. 





1120 



10-95 



1-605 



2-310 









iron 





149 3 



18-21 



1-250 



1-897 









Mixture ditto, 4 



63 



373 



1-43 



2-890 



4-508 



1842 



IV.c3 



Ditto 



bars fin. iron, 





747 



5-31 



2-090 



2-999 









5 ties -j^r in. iron 





1120 



9-24 



1-352 



2-732 









Mixture ditto, 4 



64 



373 



1-85 



3-190 



3-553 



2551 



IV.C4 



Ditto, but concrete 



bars fin. iron, 





747 



4-70 



2-900 



3-388 







thrown off one end 



2ties^-in.iron 





1120 



8-28 



2-488 



3-050 







also. 



1 cement, 2 fine 



64 



373 



3-09 



2-073 



2-126 



2047 



IV.c5 



Ditto, but both ends 



Nepean sand, 3 





747 



7-86 



1-465 



2-026 







sound. 



off in. shivers; 





1120 



1686 



•793 



1-496 









4 bars f in. iron 



















15 ties -nyin. iron 



















Mixture ditto, 4 



64 



373 



2-88 



1-888 



2-283 



1726 



IV.c6 



Shattered near one 



bars f in. iron, 





747 



8'43 



1-490 



1-888 







end, other end sound 



5 ties -j 3 ^ in. iron 





1120 



15-88 



1-038 



1-590 







for 12 inches. Con- 

 crete off rods. Ver- 























tical rods bent. 



