General Building Concrete

Front 1

Concrete is a mixture of cement, sand and course aggregate (gravel) mixed in the proper proportions. Concrete consists of two aggregates or hard materials and a binder thouroughly mixed together with water.

Back 1

True

Front 2

The proportions of concrete are indicated by three numbers. A 1-2-4 mixture is part 1 cement, 2 parts gravel and 4 parts sand.

Back 2

False

(1part cement, 2 parts sand, 4 parts gravel)

Front 3

A good mixture for a footing consists of 1 part cement, 4 parts sand, and 3 parts gravel

Back 3

False

Front 4

Cement mortar is composed of one part cement and 3 parts of fine sand

Back 4

True

Front 5

Terrazzo is a special mixture of concrete

Back 5

True

Front 6

Concrete weighs between 200 and 225 lbs. per cubic ft.

Back 6

False

(137)

Front 7

Concrete should be mixed dry before water is added.

Back 7

True