XXXVI. 



W. H. WARREN. 



Series III.— COMPRESSION TESTS OF CONCRETE CUBES, 

 6 inches by 6 inches. Mean of Two Tests. 







Proportions used 



Force required to crush 



Force required to crush. 



No. 



Description. 



in gauging. 



tons per square foot. 



lbs. per square inch. 







at 

























"3 



-z 



2 



z 



92 days 



181 days 



3t>5 days 



92 days 



181 days 



36S days 







6 



CO 



CO 



o 

 02 



£ 



old. 



old. 



old. 



old. 



old. 



old. 



1 



Cement, Tripod 



1 



2 





4 



0-910 



75-98 



84-62 



12275 



1181-9 



1316-0 11909-7 



2 



brand. 



1 



2 





5 



0910 



98 50 



12277 



142-80 



15330 



19081 2221-5 



3 



Sand, Nepean. 



1 



2 





6 



1-010 



9089 



131-83 



140-70 



1413-9 



12047-0 j2188 9 



4 



Stone, Milestone 



1 



3 





4 



1-015 



60-98 



7522 



93-70 



948-6 



111700 1202-1 



5 



2 inch gauge and 



1 



3 





5 



1-015 



5323 



74-55 



7730 



829-2 



1170-0 



1457-6 



6 



downwards. 



1 

 1 



3 



2 



- 



6 



4 



1-015 



70-59 



76-88 



86-70 



1098-6 



11960 



13435 



7 



Cement, Tripod 



1-000 



10361 



12830 



149-3 



1611-8 



19960 23223 



8 



brand. 



1 



2 





5 



1-000 



9955 



123-97 



10900 



1548-6 



1928-5 1695-2 



9 



Sand, Nepean. 



1 



2 





6 



1-000 



83-84 



116-43 



109-00 



1304-2 



18115 1695-2 



10 



Stone, sandstone 



1 



3 





4 



1-250 



8330 



99 33 



114-70 



1295-8 



1545-5 17844 



11 



2\ inch gauge 



1 



3 





5 



1-250 



6080 



74-37 



80-95 



945-8 



1157-0 11259-0 



12 

 13 



and downwards. 



1 

 1 



3 

 2 



— 



6 



4 



1-500 



52-94 



7205 



77-85 



8236 



1121-0 



1211-8 



Cement, Tripod 



1-000 



75-27 



97 23 



116-85 



1205-6 



1547-5 



18170 



14 



brand. 



1 



2 





5 



1000 



7491 



108-64 



127-70 



11653 



1691-5 



1986-0 



15 



Sand, Nepean. 



1 



2 





6 



1-000 



94-11 



107 05 



156-10 



14639 



1662-5 



24270 



16 



Stone, sandstone 



1 



3 





4 



1250 



71-25 



77-45 



11710 



1108-5 



12050 



1821-5 



17 



2 inch gauge and 



1 



3 





5 



1-250 



6991 



80-71 



6770 



1087-5 



12555 



1052-8 



18 



downwards. 



1 



1 



3 





6 



1-500 



64 33 



9255 



85-70 



10007 



L4400 



13333 



19 



Cement, Tripod 



2 





4 



0-965 



57-59 



70-62 



86-40 



8958 



10985 



1344-1 



20 



brand. 



1 



2 





5 



1-002 



10423 



124-99 



159-55 



1622-2 



22550 



2482 1 



21 



Sand, Nepean. 



1 



2 





6 



1-100 



38-03 



3665 



5640 



5916 



709 



877-1 



22 



Stone, pebbles, 2\ 



1 



3 





4 



1-203 



42-14 



44 95 



54-95 



6555 



699 



8849 



23 



inch gauge and 



] 



3 





5 



1-337 



33-94 



32-76 



48-45 



527-0 



503 



753-8 



24 



downwards. 



1 

 1 



3 





6 



1-434 



22-45 



21-60 



31-85 



349 3 



3350 



495-5 



25 



Cement, Tripod 



2 



1 



4 



1-040 



5401 



62-41 



89 50 



8403 



971-0 



1392-3 



26 



brand. 



1 



2 



2 



4 



1-250 



58-48 



62-74 



102-35 



909-7 



984-0 



1591-6 



27 



Sand, Nepean. 



1 



2 



3 



4 



1-400 



60-18 



55-80 



9640 



9361 



866-0 



14293 



28 



Stone, bluestone 



1 



3 



1 



4 



1029 



91-96 



75-27 



129-00 



1430-6 



11840 



2006-9 



29 



1-g inch gauge 



1 



3 



2 



4 



1156 



7294 



7411 



107-50 



1134-7 



1153-0 



1672-2 



30 



and downwards. 



1 

 1 



3 

 2 



3 



4 



1368 



44-86 



7283 



71-55 



697-9 



11440 



1113-4 



31 



Cement, Tripod 





7139 



65-22 



88-40 



1110-5 



10155 



1375-0 



32 



brand. 



1 



3 





... 





7902 



58 35 



98-55 



1228-8 



908-0 



1532-6 



33 



9»a.nd, N^PPan. 



1 



4 



... 



. 





52-54 



54 87 



47-85 1 



782-6 ' 



853-0 



744-4 ] 



