Table 1.--_Materials for 1 cubic yard of rammed concrete._

Proportions. | | |

| | |

Cement.| Sand. | Gravel.| Cement. | Sand. | Gravel.

-------+-------+--------+----------+----------+-----------

| | | _Sacks._ |_Cu. yds._| _Cu. yds._

1 | 1 | --- | 19.20 | 0.74 | ---

1 | 2 | --- | 13.48 | 1.00 | ---

1 | 2-1/2| --- | 11.00 | 1.01 | ---

1 | 3 | --- | 10.40 | 1.16 | ---

1 | 1 | 2 | 10.52 | .39 | 0.78

1 | 1-1/2| 3 | 7.64 | .42 | .85

1 | 2 | 4 | 6.04 | .45 | .89

1 | 2-1/2| 5 | 4.96 | .46 | .92

1 | 3 | 5 | 4.64 | .52 | .86

1 | 3 | 6 | 4.24 | .47 | .94

-------+-------+--------+----------+----------+----------