513
CEMENT--RETARDED SETS,
CEMENT, WITH PLASTER—Continued.
		Time of setting in air								Compressive		
		at temperatures of—								strength.		
	Honrs								Sec-			
Marks.	re-								tional			Remarks.
	tarded.	0° F.		70° F.		Height.	Compressed surface.		area.	Total.	Per square inch.	
		Mos.	Days.	Mos.	Days.	Ins.	Ins.	Ins.	Sq. in.	Pounds.	Pounds.	
J 17	96	4		1		1.99	1.98	2. 04	4.04	2,250 2,400	557	
						2.01	2.01	2.00	4.02		597	
						2.00	2.00	2.01	4.02	2,080	518	
						2.02	1.99	2.03	4.04	2,770	686	
						1.98	2.02	2.02	4.08	2,570	630	
J 17	96	5			1	2.12	2.01	2.00	4.02	1,610 1,930	401	
						2.02	2.01	2.02	4.06		475	
						2.09	2.01	2.00	4.02	1,980	493	
						2.01	2.01	2.00	4.02	1,800	448	
						2.02	2.00	2.04	4.08	1,300	319	
J 17	96			5		2.00	2.10	1.96	4.12	1,500 1,200	364	
						2.00	2.04	2.00	4.08		294	
						1.98	2.03	2.00	4.06	1,450	357	
						1.98	2.02	1.99	4.02	1,490	371	
						2.00	2.05	1.99	4.08	1,190	292	
J 17	96					2.02	2.00	1.97	3.94	2,000 1,610 2,090 1,880	508 401 523 461	(־Heated at 110°
						1.98 2.00 2.01	2.00 2.00 2.04	2.01 2.00 2.00	4.02 4.00 4.08			C. to a con-J stant weight | before test-
						1.96	2.00	1.98	3.96	1,700	429	•hig. [Loss=16per ct.
J 17	96	4		2		2.00	2.00	2.00	4.00	1,800 1,400	450 357	
						2.00	1.96	2.00	3.92			
						2.00	2.02	2.06	4.16	2,100	505	
»						1.98	2.05	2.03	4.16	2,120	510	
						1.99	2.04	2.03	4.14	1,980	478	
J 17	96			6		2.02	2.02	1.99	4.02	1,700 1,940	423 473	
						1.98	2.02	2.03	4.10			
						1.98	1.98	2.01	3.98	2,200	553	
						2.02	2.02	2.02	4.08	2,120	520	
						2.00	1.98	2.00	3.96	2,600	657	
J 17	102			6		4.01	3.93	3.94	15.48 15.44	5,700 8,800	368 570	
						4.03	3.91	3.95				
						2.96	2.98	2.99	8.91	6,300	707	
				•		2.98	3.00	2.97	8.91	5,700	640	
CEMENT WITHOUT PLASTER.
J 22	72	4			4	2.01	2.07	2.04	4.22	3,680	872	
						2.03	2.02	2.08	4.20	3,520	838	
						2.01	2. 06	2.04	4.20	3,630	864	
						2,01	2.02	2.03	4.10	2,500	610	
						2.05	2.01	2.03	4.08	3,480	853	
J 22	72			4		1.99	2.08					
						2.00	2.0Ò	2.04	4.08	1,200	294	
						2.06	2.00	1.99	3.98	1,690	425	
						2.03	2.01	2.01	4.04	1,100	272	
						2.06	2.00	2.01	4.02	1,310	326	
J 22	72	4		1		2.05						
						2.03	2.02	2.01	4.06	2,300	567	
						2.00	2.01	2.00	4.02	2,850	709	
						2.00	2.05	2.06	4.22	3,600	853	
						2.01	2.03	2.06	4.18	2,300	550	
J 22	72	5			1	2.00	2.02	2.08				
						1.99	2.03	1.96	3.98	2,550	641	
						2.00	2.02	2.02	4.08	3,200	784	
						2.01	2.05	1.99	4.08	2,550	625	
						2.02	2.03	2.00	4.06	2,900	714	
J 22	72			5		1.98						
						1.99	2.06	2.01	4.14	1,700	411	
						2.03	2.06	1.97	4.06	2,250	554	
						1.98	2.03	2.01	4.08	1,920	471	
						2.03	1.98	1.99	3.94	1,740	442	
H. Doc. 508----33