529
CEMENT--LOSS IN WEIGHT, ETC.
LOSS OF AVEIGHT OF GROUTS SET IN AIR.
The quantity of water used in mixing is stated on the accompanying diagram. Two or three days were required after mixing for the material to acquire sufficient strength to admit of removal from the molds.
Observations on the loss in weights began immediately thereafter and continued over a period of 28 days. The compression tests were made at the end of this period.
TESTS OF GROUTS, NEAT CEMENT.
Specimens used in loss in weight determinations. Set in air. Age, 1 month.
Brand.	Dimensions.			Sectional area.	Ultimate strength.		
	Height.	Compressed surface.			Total.	Per square inch.	Remarks.
	Inches.	Inches.	Inches.	So. inches.	Pounds.	Pounds.	
Josson		6.02	5.99	5.60	33.54	77,100	2,299	
	6.07	6.00	5.66	33.96	83,400	2,456	
	6.06	6.00	5.80	34.80	85,100	2, «5 .	
Steel 		5.96	5.98	5.65	33.79 .	19,600	5&0	
	6.02	5.77	5.97	34.45-	18,900	549	
	6.00	5.79	5.96	34.51	19,180	■ 556 v	
Bonneville im-							
proved 		6.00	6.08	5.99	36.42	18,200	500	
	6.00	5.97	6.16	36.78	19,100	519	
	6.05	6.00	6.06	36.36	15,580	428	
Hoffman		5.96	6.06	5.70	34.54	7,040	204	
	6.02	5.52	5.98	33.01	6,800	206	
	5.97	5.36	6.02	32.27	5,360	166	
Mankato		6.03	5.94	5.98	35.52	11,250	317	
	5.97	5.89	6.02	35.46	11,200	316	
	6.03	5.97	5.90	35.22	10,300	292	
Norton		6.00	6.00	6.11	36.66	9,920	271	
	5.99	6.03	6.23	37.57	9,920	264	
	6.02	5.98	6.18	36.96	10,300	279	
H. Doc. 508----34