CEMENT—SET AT DIFFERENT TEMPERATURES
582
RESULTS ARRANGED TO SHOW THE GAIN IN STRENGTH OF SPECIMENS WHICH SET IN AIR DIFFERENT INTERVALS OF TIME AT 70° F.—Continued.
Brand.	Time of setting in air.		Compres- sive strength per square inch.	Gain per square inch.
	Months. 1	Days. 0	Pounds. 3,730 3,370	Pounds.
	1	7		} -360
			724 730 661 639	
		37		} 6
	3 3	0 8		| - 22
	1	0	1,140 -1,250	} 90
	1	7		
	2 2	0 7	1,190 986	} -204
		8		} 180
			808	
		23		j■ 160
		30		
	3 3	0	1,070 1,270	| 200
		o	1,090 924	} -166
	3	7		
			1,560 1,470	]- - 90
	1	7		
	3 3	3 7	1,240 1,400	} 160
RESUME OF RESULTS, SHOWING THE COMPARATIVE GAIN IN STRENGTH OVER CORRESPONDING INTERVALS OF TIME OF SPECIMENS WHICH SET IN AIR AT DIFFERENT TEMPERATURES.
Gain in comprehensive strength per square inch after .6 days or 7 days in air at 70° F., succeeding—
1 mo. at 0°+l day at 70° F.	1 mo. at 39° F.	1 mo. at 70° F.
Pounds.	Pounds.	Pounds.
990	570	220
598	760	- 10
561	200	40
1,454	720	-450
1,083	990	-360
210	214	6
492	440	90
200	376	
318	91	
337	490	- 90
3 mos. at 0°+l day at 70° F.	3 mos. at 39° F.	3 mos. at 70° F.
970	740	
1,140	800	a-880
896	330	
99	330	h- 22
332	c 630	
181	- 80	200
242	d 280	d 160
Star................
Star, 1:1 mortar....
Storm King..........
Alsen...............
Josson..............
Austin..............
Bonneville Improved Hoffman.............
Norton..............
Obelisk.............
Star................
Alsen...............
Josson..............
Austin..............
Bonneville Improved
Hoffman.............
Obelisk.............
d 4-day interval.
c 5־day interval.
i> 8-day interval.
«9־day׳interval.