UNIT 5.1

Question 1

a combination of five major elements in various
proportions, cement, water, coarse aggregates (gravel), fine
aggregates (i.e. sand), and air.

Answer 1

concrete mix

Question 2

Additional elements such as
_________ materials and _______ admixtures can also be
incorporated into the mix to give a certain desirable properties.

Answer 2

pozzolanic, chemical

Question 3

The determination of the relative amounts of materials needed to produce a concrete
that will be economical and workable in the plastic state and that will have the
required properties in the hardened state

Answer 3

Concrete Mix Design

Question 4

The determination of the relative amounts of materials required to produce a
concrete that will be ________ and ________ in the plastic state and that
will have the required properties in the hardened state.

Answer 4

ACI Method Design MIX, economical, workable

Question 5

the maximum size should be the largest that is economically
available and consistent with the dimensions of the structure. T or F

Answer 5

F (Nominal)

Question 6

In no event should the nominal maximum size exceed:

 _____ of the narrowest dimension between sides of
forms
 ______ the depth of slabs
 ______ of the minimum clear spacing in between individual reinforcing bars, bundles of bars or pre-
tensioning strands

Answer 6

1/5th, 1/3rd, 3/4th

Question 7

The required cement
content is equal to
the estimated mixing
water divided by the
water-cement ratio. T or F