SHOWING THE QUANTITIES OF MATERIALS AND THE
RESULTING AMOUNT OF CONCRETE FOR TWO-BAG BATCH, USING
NATURAL MIXTURE OF BANK SAND AND GRAVEL.
--------+---------------+-------------------------------------------
| PROPORTIONS | TWO-BAG BATCH FOR NATURAL MIXTURE OF
| BY PARTS. | BANK SAND AND GRAVEL.
+-------+-------+---------------+-------+----------+--------
| | | | | Size of |
| | | Materials. | |Measuring |
KIND OF | | | | | Boxes. |
CONCRETE| | +-------+-------+ +----------+Water in
MIXTURE.| |Natural| |Natural| Con- | |Gallons
|Cement.|Mixture|Cement.|Mixture|crete. |Mixture of| for
| |of Sand| |of Sand| | Sand and |Medium
| | and | | and | | Gravel. |Wet
| |Gravel.| |Gravel.| | |Mixture.
--------+-------+-------+-------+-------+-------+----------+--------
| | | Bags. |Cu. ft.|Cu. ft.| |Gallons
1:2:4 | 1 | 4 | 2 | 7½ | 8½ |2′×4′×11½″| 10
Concrete| | | | | | |
| | | | | | |
1:2½:5 | 1 | 5 | 2 | 9½ | 10 |2′×5′×11½″| 12½
Concrete| | | | | | |
--------+-------+-------+-------+-------+-------+----------+--------