CEMENT---SET AT DIFFERENT TEMPERATURES.
580
RESULTS ARRANGED TO SHOW THE GAIN IN STRENGTH OF SPECIMENS WHICH SET IN AIR DIFFERENT INTERVALS OF TIME AT 0° F., ETC.—Continued.
		Time of setting in air at—				Compres- sive	Gain per square inch.
	Brand.	0° F.		70° F.		strength per• square inch.	
		Months.	Days. 28	Months.	Days. 1	Pounds. 206	Pounds. 1 200
			28			406	
		3			1	276	1 181
		3				457	
			30		1	341	} 818
			30			659	
		3			1	347	| 211
		3				558	
	s				1	225	} 337
			32			562	
		3			1	274	| 242
		3				516	
							
RESULTS ARRANGED TO SHOW THE GAIN IN STRENGTH OF SPECIMENS WHICH SET IN AIR DIFFERENT INTERVALS OF TIME AT 39° F., FOLLOWED BY INTERVALS AT 70° F.
	Time of setting in air at—				Compres- sive	Gain per square inch.
Brand.	39° F.		70° F.		strength per square inch.	
	Months.	Days. 29	Months.	Days. 0	Pounds. 2,980 3,550 3,350 4,090 1.710 2.710 1,960 2,720 2,460 3,270	Pounds. 0־5 '{
		29				
	3			0		} 740
	3					
				0		} 1,000
		15		7		
		31		0		| 760
		31				
	2			0		| 810
	2			7		
		32		0	1,600 1,800 2,300 2,530 5,250׳׳ 5,970 5,870	}- 200
		32				
	3			0		} 230
	3			7		
		31		0		} l20
		31		7		
	3			0		} 800
	3			8	6,670 4,010 5,000 4,980 4,970 806	
	1			0		} 990
	1			7		
	3			0		} -10
	3			8		
		30		0		} 214
		30		7	1,020 1,030 1,360	
	3			0		| 330
	3			7