STRENGTH OF CONCRETE. 



XXXV. 



Series II.— COMPRESSIVE STRENGTH OF CONCRETE CUBES, 

 12 inch by 12 inch. Mean of Three Tests. 







Proportions used in gauging. 



Age Cracked, 



Crushed, 



Age 



Cracked, 

 tons 



Crushed, 

 tons 





Description. 















Ce- 

 ment. 



Sand. 



Screen 

 ings. 



Stone. 



Water. 



Days. 1 



foot. 



foot. 



Days. 



ler square 

 foot. 



per square 

 foot. 



1 



Cement, Red Cross 





2 





4 



0822 



38 



80-1 



84-8 



88 



931 



93-6 



2 



brand. 

 Sand, Nepean. 

 Stone, bluestone, 





2 





5 



0-872 



38 



89-9 



93-9 



88 



990 



1000 



3 





2 





6 



1047 



39 



65-9 



66-3 



88 



65-8 



66-7 



4 



li incli gauge and 





3 





4 



1037 



39 



30 9 



330 



88 



53 8 



54-4 



5 



downwards. 





3 





5 



0965 



38 



51-1 



51-8 



101 



78 8 



79-6 



6 



7 







3 





6 



0708 



35 

 42 



32-6 



388 



97 



565 



57-6 



Cement, Red Cross 





2 





4 



0-867 



60-1 



72-2 



93 



791 



81-9 



8 



brand. 

 Sand, Nepean. 

 Stone, sandstone, 





2 





5 



919 



39 



61-8 



70-1 



93 



770 



79-0 



9 





2 





6 



0-954 



39 



83-0 



87-8 



91 



84-3 



93-6 



10 



2| inch gauge and 





3 





4 



0-984 



38 



44-7 



48-3 



92 



568 



58-3 



11 



downwards. 





3 





5 



1-116 



38 



49-5 



54-1 



93 



50-5 



53-6 



12 







3 

 2 





6 

 4 



1179 



40 



43-9 



453 



92 

 102 



526 



54-9 



13 



Cement, Globe 





0-893 



33 



35-6 



45-5 



65-9 



68-6 



14 



brand. 

 Sand, Nepean. 

 Stone, sandstone, 





2 





5 



0-923 



33 



269 



29-8 



102 



47-0 



49-5 



15 





2 





6 



0-968 



33 



28-8 



38-4 



101 



62-8 



69-4 



16 



2 inch gange and 





3 





4 



1-059 



32 



20-0 



21-8 



100 



39-2 



409 



17 



downwards. 





3 





5 



1-040 



3L 



30-6 



36-0 



99 



54-6 



551 



18 

 19 







3 





6 



1-145 



31 



19-9 



20-4 



LOO 



94 



408 

 995 



41-5 



Cement, Red Cross 





2 





4 



0-782 



33 



58-9 



80-3 



ioo-o 



20 



brand. 

 Sand, Nepean 

 Stone, pebbles 2| 



inch gausre and 





2 





5 



0-744 



32 



66-4 



85-0 



92 



85 7 



86-3 



2L 





2 





6 



0837 



39 



95-4 



ioo-o 



92 



98 3 



ioo-o 



22 





3 





4 



964 



41 



58-6 



62-5 



92 



574 



58-4 



23 



downwards. 





3 





5 



0-964 



40 



48-1 



60-6 



93 



6! -8 



62-9 



24 

 25 







3 





6 



1-049 



39 

 33 



50-4 



58-5 



93 



61-6 



636 



Cement, Red Cross 





2 



1 



4 



0-896 



533 



58-5 



93 



73-8 



75 8 



26 



brand. 





2 



2 



4 



0912 



33 



38-3 



38 9 



93 



606 



61-2 



27 



Saud, Nepean. 

 Scone, bluestone, 



1| inch gauge and 



downwards. 





2 



3 



4 



0983 



34 



293 



29-5 



93 



57-9 



603 



28 



Cement, Globe 

 brand. 



1 



2 



Top'ns 

 1 



4 



0-396 



36 

 43* 



240 



22-9 



25-0 



22-7 



89 



48-7 



52-2 



29 



Toppings. 



Stone, bluestone, 



1£ iuch gauge and 



downwards. 



1 



2 



2 



4 



1-021 



42 

 71 



42 



200 

 30-5 

 161 



22-0 



20-8 

 32-2 

 17-3 

 227 



90 



391 



40-6 



30 





1 



2 



3 



4 



1-09L 



71 



90 



343 



34-7 



31 



Cement, Globe 

 brand. 



1 



2 









37 

 66 



570 

 70-0 



579 



705 



92 



51-9 



40-1 



32 



Sand, Nepean. 



1 



3 









37 

 66 



39-5 

 410 



39-8 

 41-3 



92 



440 



45-6 



33 





1 



4 









36 

 65 



300 

 465 



30-7 

 47-0 



93 



41-0 



41-8 



