FIG. 308 CEMENT FILLING TYPES AND SUCCESSIVE STEPS 

 A, Cavity filled with cement blocks separated by tarred paper. B, Cavity ready 

 for treating and filling. C, Cavity in B, nailed and partly cement filled. Ends of 

 reinforcing rods sprung into shallow holes in wood. Wire dam, sometimes allowed 

 to remain in cement, though usually removed when cement has partly set. D, Later 

 stage of C, height of dam increased. E, Same cavity completed. 



