A rehabilitationwork will be carried out to retrofitseveral
columns of a reinforced concrete multi-
storey car...
A rehabilitationwork will be carried out to retrofitseveral
columns of a reinforced concrete multi-
storey car park which have exhibited extensive cracking and
spalling due to carbonation induced
corrosion. Being in Malaysia, the surrounding temperature is
expected to be stable throughout
the year. In order to ensure that loads are distributed
equally throughout the area of the affected
columns, the repair area should carry part of the imposed
load. Thus, in order to ensure effective
load sharing and durable repair work, the selected repair
material should possess certain
important properties. Identify and discuss five (5) of those
important properties with appropriate
justificationsfor each one.
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A reinforced concrete beam of normal weight concrete with an
effective depth of 20 IN and a width of 12 IN is reinforced with 3
IN2 of grade 60 (fy = 60 KSI) rebar. The beam has a concrete
compressive strength f’c of 3000 PSI.
(a) Determine the maximum ultimate moment which can be applied
to the beam.
(b) If the only dead load on the beam is self-weight, determine
the allowable uniformly distributed live load which can be applied...
Design a concrete mix for reinforced concrete beams of a
structure. The structure is located in a locality wherein water has
excess of chlorides in it. Required average compressive strength of
concrete has been determined to be 4700 psi. Beams have
cross-section of 9 in. x 21 in. reinforced with 4 # 6 bars.
Reinforcement has a concrete cover of 1.25 in. and there is a clear
space of 1.0 in. between form surface and steel bars. Fine
aggregate has...
Design a plain concrete footing for a 400 mm reinforced concrete
wall that supports a DL = 185 KN/m and 95 KN/m live load. The base
of the footing is to be 1.2 m below the final grade. fc’ = 20.7 Mpa
and allowable soil pressure is 200 Kpa, weight of soil is 15.82
KN/m3.
(ACI)