Page 75 - Masonry and Concrete

Concrete Construction Techniques
74 CHAPTER THREE

FIGURE 3-35
Flagstone pattern concrete. (Photo courtesy PCA).

and the joints filled with gray mortar, the effect is strikingly similar to
masonry pavers but at a lower cost.
For colored concrete, a special powdered pigment is applied to the
floated concrete surface after it has been edged and jointed. On the
first application, dry-shake about two-thirds of the recommended
amount of pigment uniformly onto the surface by hand. As the pig-
ment absorbs moisture from the concrete, float it into the surface,
apply the balance of the pigment, float the surface again, and then
apply a smooth trowel finish. Tool control joints and edge the slab
again after applying the color.

3.8 Curing Concrete

Concrete must be kept moist for several days after it is placed to allow
the portland cement in the mix to cure and harden properly. The most
common methods of curing concrete are as follows:

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