Fly ash, accelerators, superplasticizers, and air entrainment are added to a concrete mix to:

a. increase its strength.
b. increase its resistance to cracking.
c. to alter its properties in different ways.
d. to increase the concrete’s abrasion resistance.
e. to reduce the amount of reinforcing steel required.

The answer is: A. increase your strength. B. increases its resistance to cracking. D. to increase the concrete’s abrasion resistance.

Explanation:

1.- The main use of Fly Ash, is characterized by being a magnificent product in the construction industry, contributing to the  formation of a cement material that adds strength, impermeability, and other characteristics to the resulting structure.

2.- Using fly ash and other products, they produce more compact concretes, therefore more impermeable and, as a consequence, less exposed to aggressions of external agents being therefore more durable.

3.- In addition to fly ash, it has been possible to manufacture cements for specific uses, such as concrete for dams.

The answer is: A. increase your strength. B. increases its resistance to cracking. D. to increase the concrete’s abrasion resistance.