select the correct answer. which category of materials does concrete belong to and why? a. its a synthetic…
select the correct answer. which category of materials does concrete belong to and why? a. its a synthetic polymer because its a product of a chemical reaction. b. its an alloy because it contains layers of different components. c. its a ceramic because it contains substances such as sand and clay. d. its a composite because its a mixture of cement, sand, and other granular pieces.
Answer
Brief Explanations:
A composite is a material made from two or more constituent materials with different physical or chemical properties. Concrete is composed of cement, sand, and other granular pieces like gravel, which makes it a composite. Synthetic polymers are large - molecule substances made through chemical reactions, and concrete doesn't fit this definition. An alloy is a mixture of metals or a metal and other elements, and concrete isn't metallic. Ceramics are made by heating clay - based materials to high temperatures, and concrete is not made in this way.
Answer:
D. It's a composite because it's a mixture of cement, sand, and other granular pieces.