Concrete Fundamentals Flashcard

Front

What is the primary material used to make concrete?

Back

Cement

Front

Which property of concrete allows it to be molded into various shapes?

Back

Pliability when mixed

Front

What is the typical compressive strength range for most concrete structures?

Back

30 to 50 MPa

Front

What is the main function of gypsum in cement?

Back

To retard premature hardening

Front

Which of the following is a common cement extender? Water, Gravel, Fly Ash, Sand

Back

Fly Ash

Front

What is the role of water in fresh concrete?

Back

To act as a chemical reagent

Front

What is the maximum allowable chloride concentration in mixing water for reinforced concrete?

Back

1000 mg/l

Front

What is the term for the reaction of cement compounds with water?

Back

Hydration

Front

Which compound in Portland cement is responsible for early strength development? Options: Tetra calcium alumina ferrite, Di calcium silicate, Tri calcium aluminate, Tri calcium silicate

Back

Tri calcium silicate

Front

What is the effect of using too much water in a concrete mix?

Back

Increased permeability