14 BULLETIN 105, U. S. DEPARTMENT OF AGRICULTURE. 



Table 17. — Materials and cost data for brick pavement at Chevy Chase, Md. 



Description: 



Length of section feet . . 980 



Area of section square yards . . 2, 055 



Quantities of materials (per square yard) : 



Gravel cubic yard . . 0. 150 



Sand do 0. 065 



Cement barrel- . 0. 145 



Pavement — 



Sand cushion cubic yard. . 0. 061 



Brick number . . 40 



Sand in grout cubic yard. . 0. 005 



Cement in grout barrel. . 0. 031 



Cost per square yard: 



Base — ■ 



Gravel cents. . 27. 30 



Sand do 9.30 



Cement do 23.40 



Mixing and placing do ... . 17.45 



Pavement — 



Sand in sand cushion do - . . . 10. 10 



Preparing sand cushion do ... . 3. 66 



Brick do. . . . 80. 00 



Unloading and piling brick from car do . . 15. 23 



Hauling and piling brick by roadside do 11. 18 



Laying brick do 5. 20 



Rolling brick do 1.76 



Sand in grout do 0. 80 



Cement, in grout do 5. 08 



Grouting do 2. 96 



Protection do 1.57 



General — 



Preparing subgrade do 21. 44 



Superintendence do . 10. 43 



General expense do 4 . 54 



Miscellaneous do 6. 81 



Total cost: 



Per square yard do 258. 21 



Total section 1 $5, 515. 86 



COMPLETE SUMMARY OF 1912 PROJECT AT CHEVY CHASE, MD. 



On January 29, 1914, a careful inspection of all the experiments 

 was made, and their condition was reported as follows: 



Experiments Nos. 1 and 2, the bituminous concretes, are both in 

 excellent condition. The section laid under the Topeka specification 

 has a slightly wavy surface as compared with the District of Columbia 

 pavement, and has compressed in a few places below the top of the 



1 Includes also $136.59, the cost of a concrete shoulder, 6 inches by 8 inches, 1,330 linear feet at 10.12 cents 

 per linear foot; and $73.05, the cost of an expansion joint, 1,900 linear feet, at 3.84 cents per linear foot. 



