CEMENT--RETARDED SETS
510
STAR PORTLAND CEMENT, WITHOUT PLASTER.
	Dimensions.			Sectional area.		Compressive strength.		
Hours.	Height.	Compressed surface.			First crack.	Total.	Per square inch.	Remarks.
0	Inches. 4.05	Inches. 3.98	Inches. 4.10	Sq. inches. 16.32	Pounds. 36,200	Pounds. 37,100	Pounds. 2,273	
0	4.08	3.97	4.07	16.16	41,300	41,300	2,5b6	
1	4.06	. 3.96	4.03	15.96		44,100	2,763	
1	4.02	3.97	4.07	16.16		39,200	2,426	
2	4.00	4.05	4.02	16.28		41,800	2, 568	
2	4.02	4.00	4.06	16.24		41,500	2,555	
3	4.04	3.97	4.04	16.04		43,300	2,700	
3	4.06	3.98	4.03	16.04		42,500	2,650	
4	4.03	3.98	4.05	16.12		39,100	2,426	
4	4.07	3.98	4.03	16.04	27,800	30,600	1,908	
6	4.03	3.98	4.02	16.00		36,500	2,281	
6	4.06	4.00	4.03	16.12		36,800	2,283	,
8	4.06	3.96	4.04	16.00		32,100	2,006	
8	4.02	3.97	4.07	16.16		32,900	2,036	
10	4.07	3.97	4.00	15.88		29,800	1,877	
10	4.08	3.98	4.02	16.00		28,900	1,806	
12	4.04	3.98	4.08	16.24		26,000	1,601	
12	4. 00	3.96	4.04	16.00		23,700	1,481	
14	4.05	3.96	4.00	15.84		19,800	1,250	
14	4.01	4.02	3.97	15.96		19,700	1,234	
16	4.07	4.01	3.99	16.00		23,500	1,469	
16	4.05	4.00	3.98	15.92		22,100	1,388	
18	4.02	4.09	4.00	16.36		23,000	1,406	
18	4.06	3.99	4.00	15.96		21,200	1,328	
20	4.01	4.03	3.99	16.08		24,300	1,511	
20	3.98	4. 04	3.94	15.92		22,100	1,388	
22	, 4.05	3.98	3.94	15.68		23,000	1,467	
22	4.00	4.04	3.93	15.88		21,500	1,354	
24	4.10	3.99	4.00	15.96		23,200	1,454	
24	4.05	4.00	3.98	15.92		23,400	1,470	
26	4.00	4.01	3.97	15.92		20,500	1,288	
26	4.00	3.99	4.00	15.96		18,800	1,178	
28	3.97	4.03	4.05	16.32		24,700	1,513	
28	3.98	4.04	4.06	16.40		23,200	1,415	
30	4.02	3.99	4.08	16.28		20,100	1,235	
30	3.98	4.01	4.02	16.12		19,300	1,197	
32	3.96	3.97	4.02	15.96		14,400	902	
32	3.96	4.04	4.06	16.40		17,800	1,085	
34	4.02	3.94	4.06	16.00		18,200	1,138	
34	4.00	3.94	4.06	16.00		17,100	1,069	
36	4.05	3.95	4.06	16.04		17,400	1,085	
36	3.96	4.00	4.07	16.28		18,200	1,118	
38	4.05	3.96	4.12	16.24		19,500	1,201	
38	3.96	4.01	4.05	16.24		17,600	1,084	
40	3.97	4.03	4.01	16.16		18,800	1,163	
40	4.02	3.99	4.04	16.12		17,400	1,079	
42	4.01	3.95	4.07	16.08		18,300	1,138	
42	3.98	4.07	4.00	16.28		18,700	1,149	
44	4.00	3.97	4.08	16.20		19,800	1,222	
44	4.02	3.95	4.03	15.92		16,200	1,018	
46	4.00	3.98	3.94	15.68		17,600	1,122	
46	4.00	3.96	3.98	15.76		16,100	1,022	
48	4.03	3.94	4.05	15.96		15,300	959	
48	4.05	3.98	4.06	16.16	13,000	15,800	978	
60	4.06	3.97	4.03	16.00		17,500	1,094	
50	4.07	3.97	4.00	15.88		16,600	1,045	
52	4.08 ־	3.96	4.01	15.88		16,600	1,045	
52	4.06	3.94	4.00	15.76		16,500	1,047	
54	4.06	3.95	4.10	16.20		19,400	1,198	
54	4.06	3.95	4.08	16.12		20,500	1,272