Series I.— COMPRESSIVE 



STRENGTH OF 



CONCRETE 



CUBES, 





6 inches by 6 inches. 







£ Description of concrete. 



Propor- 

 tion of 

 stone to 

 cement. 



Percent, 

 of water 

 used in 

 gauging. 



Weight of 

 concrete | 



Force required to crack the 

 cube in lbs. per sq. in. 



Force required to crush the 

 cube in lbs. per sq. in. 



U lbs. per 

 sube foot. 



* days 

 (dd. 



28 days 

 old. 



84 days 

 old. 



7 days 

 oli. 



28 days 

 old. 



84 days 

 old. 



1 Blue metal sizes 



6-1 



5-55 



148 



833 



1139 



1083 



1277 



2277 



1555 



2 A. B. and C, 



it 



»> 



„ 



925 



1555 



1166 



1414 



2305 



1944 



3 mixed in propor- 



8-1 



5-54 



„ 



722 



805 



805 



1222 



1833 



1555 



4 tionof 5:2:1 with 



>» 



„ 



„ 



547 



1139 



1166 



1083 



1916 



1611 



5 39-44% of blue- 



10-1 



531 



35 



500 



750 



500 



1083 



1361 



1222 



6 stone dust. 



' » 



>> 



» 



361 



639 



805 



1028 



1194 



1416 



7 Blue metal sizes 



6-1 



4-94 



144 



750 



1111 



805 



1472 



1750 



1555 



8 A. B. and C, 



„ 



,, 



}> 



889 



1389 



1000 



1382 



1694 



1750 



9 mixed in propor- 



8-1 



4-91 



„ 



694 



777 



944 



944 



1166 



1166 



10 tion or 5:2:1 with 



,, 



,, 



5J 



584 



833 



722 



972 



1333 



944 



11 39-44% Nepean 



10-1 



4-66 



}) 



278 



583 



555 



611 



889 



833 



12 River sand. 



" 



» 



,, 



278 



555 



416 



666 



750 



833 



i 



13 Blue metal sizes 



6-1 



5-18 



144 



833 



1194 



1361 



1166 



1888 



1694 



14 A. B. and C, 



>> 



„ 



>j 



611 



1000 



694 



1222 



1633 



1555 



15 mixed in propor- 



8-1 



5-0 





361 



533 



694 



889 



1166 



1333 



16 tionof 5:2: L with 



>t 



„ 



„ 



527 



^77 



722 



833 



1166 



1277 



17 39-44% Sydney 



10-1 



4-92 



M 



441 



388 



666 



639 



888 



944 



18 white sand. 



» 



j> 



» 



333 



444 



527 



666 



1166 



1194 



19 Nepean River 



6-1 



4-59 



150 



925 



611 



1500 



1388 



1722 



2083 



20 gravel, sizes D. 



„ 



,, 



„ 



750 



1083 



666 



1472 



1750 



2083 



21 E. F. mixed in 



8-1 



4-41 



33 



555 



555 



694 



1111 



1555 



1888 



22 proportions of 



j> 



„ 



33 



722 



555 



722 



1305 



1500 



1833 



23 5:2:1 with 31-62% 



10-1 



4-18 



„ 



500 



277 



444 



944 



1333 



1388 



24 bluestone dust. 



33 



)> 



» 



277 



250 



777 



972 



1000 



1722 



25 Nepean River 



6-1 



4-11 



150 



972 



1111 



1111 



1500 



1527 



1583 



26 gravel, sizes D. 



, 



j» 



„ 



777 



1583 



888 



1277 



1777 



1847 



27 E. F. mixed in 



8-1 



4-06 



j, 



611 



694 



972 



972 



1194 



1639 



28 proportions of 



„ 



„ 



,, 



722 



1055 



777 



1111 



1333 



1361 



29 5:2:1 with 31-62% 



10-1 



3-97 



„ 



416 



750 



889 



611 | 925 



1217 



30 Nepean R. sand. 



„ 



" 



33 



333 



611 



750 



777 833 



1166 



31 Nepean River 



6-1 



4-39 



148 



583 





1250 



1111 





2277 



32 gravel sizes D. 



>> 



„ 



93 



555 



880 



722 



1388 



2083 



2139 



33 E. F., mixed in 



8-1 



4-19 



„ 



639 



694 



925 



833 



1639 



1472 



34 proportions of 



„ 



>» 



„ 



472 



750 



472 



722 



1555 



1111 



35 5:2:1 with 31-62% 



10-1 



4-10 



„ 





889 



527 



527 



1194 



1139 



36 Sydney w. sand. 



» 



» 



» 



389 



833 



500 



694 



1139 



1166 



37 Broken sand- 



6-1 



8-42 



136 



722 



1389 



972 



1111 



1750 



1722 



38 stone sizes G. 



„ 



,, 



, 



361 



1028 



916 



1027 



1611 



1694 



39 H. I., mixed in 



8-1 



7-94 



5J 



472 



694 



833 



916 



1250 



1639 



40 proportions o'. 





,, 



,, 



277 



861 



722 



666 



1305 



1527 



41 5:2:1 with 39- 44% 



io'-i 



7-91 



„ 



277 



500 



805 



639 



1222 



1388 



42 bluestone dust. 



" 



» 



» 



416 



722 



527 



639 



1194 



1138 



43, Broken sand 



. 6-1 



7-78 



134 



777 



1416 



1277 



1166 



1777 



1611 



44 stone sizes G 



„ 



,, 



„ 



750 



1194 



1000 



1111 



1611 



1777 



45 H. I., mixed ir 



8-1 



7-84 



„ 



555 



861 



944 



805 



1277 



1388 



46 proportions o 



„ 



„ 



33 



639 



777 



888 



861 



1139 



1416 



47 5:2:1 with 39-44% 



, 10-1 



7-80 



„ 



472 



611 



666 



694 



861 



1027 



48 Nepean R. sand 



» 



» 



33 



361 



694 



583 



639 



944 



1083 



49 Broken sand 



. 6-1 



7-84 



134 



666 



1111 



1138 



1027 



1611 



1750 



50 stone, sizes G 



>, 



33 



33 



500 



1250 



833 



944 



1666 



1611 



5l|H. I., mixed ir 



, 8-1 



7-89 



33 



444 



972 



888 



666 



1277 



1250 



52 proportions o 



f » 



',, 



33 



416 



861 



666 



666 



1305 



1277 



53 5:2:1 with 39-44^ 



, 10-1 



7-85 



33 



277 



666 



694 



500 



1028 



1083 



54 Sydney w. sand 



)> 



33 



33 



277 



750 



583 



500 



1000 



1083 



