Page 70 - Masonry and Concrete

Concrete Construction Techniques
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CONCRETE CONSTRUCTION TECHNIQUES

FIGURE 3-28
Formed control joints. (Photo courtesy PCA).

FIGURE 3-29
Sawed control joints. (Photo courtesy PCA).

Choose an aggregate that has a fairly narrow range of size variation
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3
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such as 4 in. to 2 in., 8 in. to 8 in., or 2 in. to 4 in. You will get
a more uniform texture if the stones are all similar in size. For best
results, select rounded river gravel, and avoid crushed stone that is
sharp or angular. After the concrete has been bull floated or darbied,
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