TABLE IV. m.— COMPRESSION TEST OF CONCRETE PRISMS. 



Length 12 inches, Octagonal Section. 



Elastic limit of soft steel wire used in spirals = 39,000 pounds per square inch. 

 Elastic limit of Bessemer steel used in longitudinal rods = 37,700 pounds per 

 square inch. Area 297589 square inches. 







m 3 



.So 



ill 



ce 



.5 



1? 



6 





Composition 



§ 







II. 



a. 2 

 8 • ^ 





E> 



a 



SUITS 



5 5 -a 



a 



M 





a 



|ll 



aw a 



o "rt a 



** O a 



o 



o 



3j§! 





3 





< 



3 

 u 



6 



6 



i 



w 



« 



(S 













xl0» 









1 cement, 2 sand, 



141 



301 



0-80 



3-760 



3-740 



2409 



lFig. 



Shatterpd ; no signs 



2 f in. shivers, 





602 



1-62 



3340 



3-720 





IV.m 



of fracture before 

 breaking 



no bars, plain. 





1204 



3-80 



2-370 



3- 170 











1806 



7'25 



1-250 



2-490 









1 cement, 2 sand, 



136 



301 



0-81 



3540 



3-740 



4220 



2 Fig. 



Outside peeled off at 



2 f in. shivers. 





602 



1-74 



3010 



3-450 





IV.m 



101,000 pounds and 

 bioke at 126,000 

 pounds ; slightly 



Spiral fin. pitch 





1204 



3-91 



2-410 



3-070 







5 in. dia. No. 5 





1806 



6-96 



1-740 



2-580 







crushed. 



gauge wire 





2258 

 2860 



9-98 

 1941 



1-156 

 •436 



2-260 

 1-470 









1 cement, 2 sand, 



135 



301 



0-65 



4-300 



4-630 



4517 



3 Fig. 



Outside peeled off at 



2 f in. shivers. 





602 



1-42 



3440 



4-180 





IV.m 



110,000 pounds, ,Jand 

 broke at 134,000 



Spiral f in. pitch 





1204 



3-52 



2-410 



3-430 







pounds. Crushed at 



5 in. dia. No. 5 





1806 



6-71 



1-440 



2-690 







centre. 



gauge wire ; 6 ^ 





2258 



10-73 



•990 



2-120 









in. steel vertical 



















rods. 



















1 cement, 2 sand, 



139 



/301 

 a \602 



0-98 



2-740 



3-070 



3158 



4 Fig. 



Cracked at 695,000 



2 f in. shivers. 





2-49 



1-600 



2-420 





IV.m 



pounds and outside 

 peeled off, body- 



Spiral fin. pitch 





(602 

 b \301 



3-19 



4-150 



1-890 







crushed and bent ; 



5 in. dia. No. 5 





2-16 



2-510 



1-400 







broke at 93,000 



gauge wire. 





301 



2-09 



2-870 



1-440 







pounds. 





a 



\ 602 

 ( 1204 

 (-1204 



2-15 



8-12 



1461 



2-280 



•765 



3-340 



1-910 

 1-480 



•825 











b 



] 602 

 t 301 

 ( 301 

 ) 602 



12-11 



10-19 



962 



11-15 



1-770 

 1-310 



2-000 

 2-000 



•500 

 •296 

 •313 

 •545 











a 



1l204 

 (.1655 



14-42 

 19-69 



1-400 

 •450 



•836 



•844 









1 cement, 2 sand, 



137 



S 301 



0-64 



5-000 



■ 4-850 



5421 



1 Fig. 



Cracked at 134,000 



2 f in. shivers. 





a ( 602 



1-41 



3-760 



4-280 





IV.m 



pounds and outside 

 peeled off ; vertical 



Spiral f in. pitch 





C602 

 b l301 



1-55 



6-000 



3-880 







rods bent. Prisni 



5 in. dia. No. 5 





0-86 



4-150 



3-500 







crushed. Broke at 



gauge wire, 10 f 





r 301 



0-83 



6-000 



3-630 







162,000 pounds. & 

 a — load ascending 



in. steel vertical 



a 



\ 602 



1-52 



4-150 



3950 







b— load descending 



rods. 





(. 1204 

 ?1204 



2-96 

 3-50 



3-250 

 5-470 



4070 

 3-440 











b 



) 602 

 ( 301 

 f 301 

 602 

 1 1204 



2-20 

 1-39 

 1-31 

 2-06 

 3-45 



4-300 

 3 540 

 4-900 

 4-650 

 3900 



2-740 

 2-160 

 2-300 

 2-930 

 3-490 











a 



<{ 1806 



2258 



| 3312 



503 



6-76 



1222 



3-000 

 2-410 

 1-470 



3-590 

 3 340 



2-700 













L4274 



1 20-45 



•770 



2090 





1 





