Prolonged moist curing leads to the highest concrete strength.

Autogenous shrinkage occurs without the loss of moisture due to hydration reactions inside the cement matrix.

Shrinkage is the decrease in the volume of concrete during hardening and drying under constant temperature.

Autogenous shrinkage occurs when moisture diffuses out of the concrete and the exterior shrinks more rapidly than the interior.

Concrete is primarily made of two components. What are they?

Damage or collapse in extreme earthquakes is an example of a serviceability limit state.

Due to concrete being made up of elastic, brittle materials, its stress-strain curve is linear.

A shorter yield plateau signifies a _______ brittle material.

A group of 30 tests on a given type of concrete had a mean strength of 4,200 psi and a standard deviation of 800 psi. Does this concrete satisfy the strength requirement for 3,000 psi concrete?

The concrete in the core of a spiral column is subjected to a uniform confining stress σ3 of 750 psi. What will the compressive strength σ1 be? The unconfined uniaxial compressive strength is 4,300 psi.