426 



Missouri Agricultural Report. 



If the walk be on level ground, give it a slope from the center line 

 to the sides of one-fourth of an inch to the foot, to provide drainage. 



Wet this foundation of cinders and cover it with three inches of 

 a 1-3-6 concrete, and level and slope with the straightedge. In order 

 to prevent expansion cracks, the walk may be constructed in sections 

 of four to six feet long, leaving a strip of felt or tar paper between 

 each block. These expansion joints may be made about one-fourth 

 of an inch thick by cutting into the fresh laid concrete with a spade 

 and filling the space with sand instead of using strips of tar paper. 



Finish this off with a wearing course one inch thick of a mortar 

 composed of one part cement to two parts sand, troweled and smoothed 

 off to a good appearance. As soon as the film of water has left the 

 surface, trowel it till perfectly smooth. This finishing course should 

 follow the concrete course immediately and be spread on and smoothed 

 before the bottom course of concrete has set. 



Figure 17. A completed walk, showing expansion joints. 



With the trowel and straightedge, divide the finishing course into 

 sections exactly over the joints in the concrete course. Then with a 

 jointer give the top a finished appearance and use an edger to finish the 

 sides next to the mold into a smooth rounded appearance. Protect 

 the completed walk from the sun and keep it sprinkled for three or 

 four days. (Fig. 17.) 



