QUESTIONS AND PROFESSOR VERIFIED
SOLUTIONS
Portland cement concrete (PCC) hardens or gains
strength by the:
a) Hydration of the portland cement (PC)
b) Drying of the portland cement concrete (PCC) —
caused by the evaporation of some of the mix
water
c) Adding of salts to the portland cement concrete
(PCC) to promote a hardening of the PCC
d) All of the above are true
c) None of the above is true - answer-a) Hydration
of the portland cement (PC)
The strength of cured or hardened portland cement
concrete (PCC) depends on, more than any other
factor, the:
a) Water/cement (w/c) ratio of the portland cement
concrete (PCC)
,b) Quality of the paste of the portland cement
concrete (PCC)
c) Quality of curing of the portland cement
concrete (PCC)
d) All of the above are true
e) None of the above is true - answer-a)
Water/cement (w/c) ratio of the portland cement
concrete (PCC)
The most important attribute of hardened or cured
portland cement concrete (PCC) is:
a) Volume stability
b) Elasticity
c) Compressive strength
d) Impermeability
e) All of the above are true - answer-c)
Compressive strength
All the essential and desirable attributes of
portland cement concrete (PCC), such as durability,
,impermeability, resistance to volume changes, etc.,
depend, more than any other factor, on:
a) Its water/cement ratio
b) The quality of its paste
c) How well and how long the portland cement
concrete (PCC) has been cured
d) All of the above are true
e) None of the above is true - answer-c) How well
and how long the portland cement concrete (PCC)
has been cured
Manufacturing of portland cement (PC) includes
varying of proportion of the ingredients that are
used in the manufacturing of PC (in a rotating
kiln) so as to produce different types of PC, thus
producing PCs of special properties that, for
example:
a) Emit lower heat of hydration during curing
b) Gain strength more rapidly than, say, ordinary
portland cement (PC)
, c) Offer resistance to the action of sulfates on the
hardened portland cement concrete (PCC)
d) All of the above are true
e) None of the above is true - answer-d) All of the
above are true
Which of the following statements is True about
the Portalnd Cement:
a) The strength of portland cement (PC) is
determined by measuring the strength of mortar
made with Ottawa standard sand.
b) The Initial and Final Set time of Portland
Cement should be determined using either Vicat
or GillmorePenetrometer.
c) Per ASTM C150, the soundness of portland
cement (PC) paste, which refers to the ability of the
paste to retain its volume through the curing
process, could be measured using an Autoclave
Expansion apparatus.
d) All of the above are true
e) None of the above is true - answer-d) All of the
above are true