Table 8. — Compressive strength of Portland cement concrete made in various parts of the P) 
146 
The Philippine Journal of Science 
1921 
1 
I 
Days. 
29 
29 
28 
28 
30 
30 
30 
30 
30 
30 
39 
31 
40 
38 
39 
23 
37 
22 
1 
4 
Days. 
14 
14 
13 
13 
15 
15 
15 
15 
! 
1 
Water. 
t : ! 
Ji 1 
. 1 
■I 
b 
Days. 
' 15 
15 
° 15 
15 
15 
15 
15 
15 
1 
if 
. i 
; 
■8 
I 
1 
i 
! 
I 
salt from upper ledge. 
•g 
| I 
i 1 
Los Banos, basalt from 
lower ledge. 
do 
4 4 
I 
ill 
j 
i 
i 
1 
1 
half Mogondon sand. 
i 
1- 
Bayog 
I do 
: 
II 
1 I 
1! 
18 i 
. IH 
: [i 
II; 
1 
; 
h 
111 
i 
i> 
Oct. 25. 1910 
•g 
i 
4 
•§ 4 
1 
•S 4 
Dec. 10, 1910 
Apr. 1, 1911 
Apr. 21, 1911 
Apr. 22, 1911 
Apr. 25, 1911 
Apr. 21. 1911 
Apr. 18, 1911 
Apr. 26, 1911 
May 1, 1911 
May 3, 1911 
May 2,1911 
May 4,1911 
do 
May 5,1911 
1 
i 
l 
i 
.9 
i 
I 
I 
1 
a 
a 
a a 
' 1 
aa 
San Juan Bridge, Calamba 
Do ML...JH 
i 
If 
11 
11 
j 
1 
i 
! 
1- 
I 
la 
1 
San Juan Bridge, pier 3 
Do 
• i 
f 
si 
1 
< 
I 
I 
1 
ail 
1 
I 
II 
II 
II 
II 
•ON SUIOBJl 
3 31 33 333333333113311331 
