Page 58 - Masonry and Concrete
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Concrete Construction Techniques
57
CONCRETE CONSTRUCTION TECHNIQUES
fineness of the sand grains. If the volume of your sand is more or less
than that assumed in Table B of Figure 3-3, your concrete may be over-
or undersanded and therefore difficult to handle and finish. The vol-
1
ume of wet sand can be as much as 1 ⁄4 times the volume of the same
sand if it were dry. All the variables involved in sand bulking make it
difficult to adjust volume measurements, so if you are using the volume
method of proportioning ingredients, always use wet sand. If your sand
is too dry, wet it thoroughly with a garden hose the day before you
STRAIGHT FORM NAILED FROM
OUTSIDE WITH DOUBLE-HEADED NAILS
CURVED FORM NAILED FROM
INSIDE WITH COMMON NAILS
FIGURE 3-17
Nailing curved forms.
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