507
CEMENT—RETARDED SETS,
Water was added to the batches as follows:
STAR PORTLAND CEMENT, WITH PLASTER.
Interval after mixing.		Water used.		Interval after mixing.		Water used.	
		Succes- sive.	Total.			Succes- sive.	Total.
Hrs.		Pounds.	Pounds.	Hrs.	min.	Pounds.	Pounds.
Initial mixing		} 123.5	123.5	27 28	00 00	1.0 2.0	223.5 225.5
4	00	3.0	126.5	29	00	1.0	226.5
4	15	1.0	127.5	30	30	1.0	227.5
4	30	4.0	131.5	32	00	2.0	229.5
4	50	9.0	140.5	34	00	1.0	230.5
5	10	8.0	148.5	35	00	1.0	231.5
5	30	8.0	156.5	37	00	1.0	232.5
6	00	7.0	163.5	39	00	1.0	233.5
6	15	6.0	169.5	40	30	1.0	234.5
6	50	4.0	173.5	41	30	1.0	235.5
7	05	8.0	181.5	46	00	1.0	236.5
8	00	4.0	185.5	47	00	1.0	237.5.
8	45	4.0	189.5	50	00	1.0	238.5
9	30	4.0	193.5	51	10	2.0	240.5
9	50	2.0	195.5	52	00	2.0	242.5
12	00	2.0	197.5	54	30	1.0	243.5
13	00	1.0	198.5	56	00	1.0	244.5
13	30	1.0	199.5	60	00	2.0	246.5
14	00	1.0	200.5	62	00	1.0	247.5
14	50	1.0	201.5	64	00	2.0	249.5
16	00	2.0	203.5	68	00	1.0	250.5
17	00	2.0	205.5	70	00	1.0	251.5
18	00	1.0	206.5	72	00	2.0	253.5
19	10	3.0	209.5	74	00	1.0	254.5
20	00	2.0	211.5	76	00	1.0	255.5
21	00	1.0	212.5	78	00	1.0	256.5
22	00	3.0	215.5	82	00	1.0	257.5
23	00	3.0	218.5	88	00	1.0	258.5
24	00	1.0	219.5	92	00	1.0	259.5
	00	1.0	220.5	96	00	.5	260.0
26	00	2.0	222.5	100	00	.5	260.5
STAR PORTLAND CEMENT, WITHOUT PLASTER.
Initial mixing		} 158.0	158.0	34 36	00 00	2.0 1.0	189.0 190.0
7	30	2.0	160.0	38	00	1.5	191.5
8	30	1.0	161.0	40	00	1.5	193.0
9	00	2.0	163.0	42	00	1.0	194.0
10	00	1.0	164.0	44	00	1.5	195.5
11	00	1.0	165.0	54	20	0.5	196.0
12	00	2.0	167.0	56	00	1.0	197.0
14	00	2.0	169.0	58	00	1.0	198.0
16	00	2.0	171.0	64	00	1.0	199.0
18	00	2.0	173.0	68	00	0.5	199.5
19	30	1.0	174.0	70	00	0.5	200.0
22	00	2.0	176.0	71	40	1.0	201.0
23	00	1.0	177.0	78	50	0.5	201.5
24	00	2.0	179.0	81	00	0.5	202.0
25	00	1.0	180.0	85	00	1.0	203.0
26	00	2.0	182.0	90	00	0.5	203.5
28	00	2.0	184.0	92	00	0.25	203.75
30	00	1.0	185.0	96	00	0.25	204.0
32	00	2.0	187.0	98	00	0.25	204.25
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