575
CEMENT—SET AT DIFFERENT TEMPERATURES
RÉSUMÉ OF RESULTS ON SPECIMENS S MONTHS OLD.
[Specimens exposed to 0° F. temperature while setting, followed by one day in air at 70° F. before
testing. 1
Brand.	Compressive strength per square inch, specimens set in air at temperatures of—		
	0° F.	39° F.	70° F.
	Pounds. 1,720 703 1,210 624 241 478 276 347 274	Pounds. 3,350 2,300 5,870 4,980 1,030 1,250 1,310 1,100 1,700	Pounds. «4,400 2,430 4,040 3,110 661 1,720 1,070 1,090 1,240
			
			
			
			
			
			
			
			
			
	653 I 2,543		2,196
			
a Approximate.
RESUME OF RESULTS ON SPECIMENS 1 MONTH AND 3 MONTHS OLD.
[Specimens set one day in air at 70° F. before testing.]
Brand.	Compressive strength per square inch, specimens set in air at temperature of 0° F.	
	1 month.	3 months.
	Pounds. 1,350 383 749 986 347 229 238 411 206 341 225	Pounds. 1,720 497 703 1,210 624 237 241 478 276 347 274
		
		
		
		
		
		
		
		
		
		
		
	497	601
		
RESUME OF RESULTS ON SPECIMENS 1 MONTH AND 3 MONTHS OLD.
Brand.	Compressive strength per square inch, specimens set in air at temperature of 39° F.—	
	1 month.	3 months.
	Pounds. 2,980 1,600 5,250 4,010 806 1,200 952 656 1,110	Pounds. 3,350 2,300 5,870 4,380 1,030 1,250 1,310 1,100 1,700
		
		
		
		
		
		
		
		
		
	2,063 2,477