CEMENT FOR BUILDING 505 



One-third barrel of plaster (stucco) will hard-finish 100 square yards 

 plastering. 



One barrel of best lime will lay 1000 bricks. 



Two barrels of lime will lay one cord rubble-stone. 



One-half barrel of lime will lay one perch rubble-stone (| cord to perch) . 



To every barrel of lime estimate about f cubic yard of good 

 sand for plastering and brick work. 



A barrel of portland cement contains approximately 3| cubic feet, 

 and weighs 380 pounds ; a bag contains about | cubic feet, and 

 weighs 95 pounds. A barrel of natural cement contains approxi- 

 mately 3^ cubic feet, and weighs 300 pounds ; a bag contains about 

 I cubic feet, and weighs about 75 pounds. 



Use 1 part cement, 2 parts sand, 4 parts aggregate (gravel or 

 crushed stone), for very strong and impervious work. 



Use 1 cement, 2| sand, 5 aggregate, for ordinary work requiring 

 moderate strength 



Use 1 cement, 3 sand, 6 aggregate, for work where strength is of 

 minor importance. 



Floors, borders, walks, and foundations. 

 Grout floor. 



1. To secure a good grout floor, make a good foundation of small 

 stones or brickbats, and cover three or four inches thick with a thin 

 mortar, made of two parts sharp sand and one part common cement. 



2. Fresh powdered lime, 2 parts ; portland cement, 1 part ; 

 gravel, broken stone, or brick, 6 parts. Mix with water to a liquid 

 consistency, and let it be thrown forcibly, or dropped, into its position. 

 It should be well beaten or rammed to render it solid. A " skim " of 

 thin, rich mortar may be placed on top as a finish. 



3. Equal parts of gravel, well screened, and clean river or pit sand. 

 With 5 parts of sand and gravel mix 1 part of portland cement. 

 Mix with water and apply 1 inch thick. 



For garden borders. 



4. Nine parts gravel and 1 part unslaked lime ; slake the lime and cover 

 it with gravel, then add water sufficient to make a very thin mortar. 

 Apply three inches deep, allow it to stiffen a little, then roll. Finish an 

 inch thick of 1 part lime and 3 parts gravel. Apply soft. See No. 11. 



