603
CONCRETE AND MORTAR CUBES,
Marks, 78.
Composition: Alpha Portland cement, 1; granite dust, 2. Water used in mortar, 40.8 per cent of cement.
Age, 1 year.
Weight per cubic foot, 131.3 pounds.
Sectional area, 144.00 square inches.
Gauged length, 5".
Applied loads.		In gauged length.		Remarks.
Total.	Per square inch.	Compres- sion.	Set.	
	Pounds.	Inch.	Inch.	Initial load.
14,400	100	0.	0.	
25,800	200	. 0001	0.	
57,600	400	. 0003	0.	E=3,571,000 pounds per square inch.
86,400	600	. 0007	0.	
115,200	800	. 0010	0.	] E=3,461,000 pounds per square inch.
144,000	1,000	.0013	0.	
172,800	1.200	.0016	0.	Ie=3,125,000 pounds per square Inch.
600 ׳201	1,400	.0019	0.	
280,400	1,600	. 0022	0.	j
259,200	1,800	. 0026	. 0001	
288,000	2,000	.0030	. 0001	1
316,800	2,200	.0034	. 0002	
345,600	2,400	.0039	. 0003	
374,400	2,600	. 004:1	. 0003	
403,200	2,800	.0047	.0005	
432,000	3,000	.0053	.0007	
460,800	3,200	.0061	.0009	
489,600	3,400	.0067	.0011	
518,400	3,600	.0076	.0013	
547,200	3,800	.0084	.0016	
576,000	4,000	.0098	. 0021	
604,800	4,200	.0109	. 0024	
633,600	4,400	.0126	.0033	
662,400	4,600	. 0146	. 0042	
691,200 695,000	4,800 4,826	.0168	.0054	First crack and ultimate strength.
JVtarks 156•
Composition: Alpha Portland cement, 1; sand, 2; f" trap rock, 4. Water used in mortar, 54.4 per cent of cement.
Age, 1 year.
W right per cubic foot, 144.1 pounds.
Sectional area, 144.00 square inches.
Gauged length, 5".
Applied loads.		In gauged length.		Remarks.
Total.	Per square inch.	Compres- sion.	Set.	
	Pounds.	Inch.	Inch.	
14,400	100	0.	0.	Initial load.
28,800	200	. 0002	0.	
57,600	400	. 0006	0.	E=2,778,000 pounds per square inch.
86,400	600	.0010	.0001	
115,200	800	. 0013	. 0002	1 E=3,000,000 pounds per square inch. Ie=2,778,000 pounds per square inch.
144,000	1,000	.0018	.0003	
172,800	1,200	. 0023	. 0004	
201600	1,400	.0028	. 0006	
230,400	1,600	.0033	.0008	(
259,200	1,800	. 0040	. 0009	
288,000	2, 000	. 0044	.0011	J
316,800	2,200	. 0052	. 0013	
345,600	2,400	.0060	. 0016	
374,400	2,600	.0070	. 0920	
403,200	2,800	.0082	. 0025	
432,000	3,000	. 0092	. 0028	
460.800 516.800	3,200 3,589	.0115	.0039	First crack and ultimate strength.