Select the two standard sizes of concrete cylinders (diameter x height) used in compression tests.

A well graded aggregate produces a concrete that is _______ porous.

Other strength parameters are expressed relative to the tensile strength.

A lower water/cement ratio increases the porosity of the hardened concrete and thus decreases the number of interlocking solids.

Creep tends to occur more in concrete mixtures with high _______ content.

The concrete in the core of a spiral column is subjected to a uniform confining stress σ3 of 240 psi. What will the compressive strength σ1 be? The unconfined uniaxial compressive strength is 4,100 psi.

Strength of concrete in a structure tends to be somewhat higher than the strength of the control cylinders made from the same concrete.

Concrete is composed of aggregate that is chemically bound together by hydrated _______ cement.

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

As concrete is loaded and the load redistributes between elements, _______ occurs.