Building Technology 1 : CONCRETE, CEMENT & MASONRY
Building Technology 1 : CONCRETE, CEMENT & MASONRY
Exam (elaborations)
Building Technology 1 : CONCRETE, CEMENT & MASONRY
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Course
Building Technology 1 : CONCRETE, CEMENT & MASONRY
Institution
Building Technology 1 : CONCRETE, CEMENT & MASONRY
Concrete - answer-most commonly used man-made material on earth.
a composite material, consisting mainly of Portland cement, water and aggregate (gravel, sand or rock).
Plain / Ordinary Concrete - answer-often for the construction of pavements and where buildings don't require very high tens...
Building Technology 1 : CONCRETE, CEMENT & MASONRY
Concrete - answer-most commonly used man-made material on earth.
a composite material, consisting mainly of Portland cement, water and aggregate
(gravel, sand or rock).
Plain / Ordinary Concrete - answer-often for the construction of pavements and where
buildings don't require very high tensile strength
typically in the ratio 1:2:4
Coarse Aggregate - answer-must be of hard broken stone of granite or similar stone,
free from dust, dirt and other foreign matter
Fine Aggregate - answer-shall be of coarse sand consisting of hard, sharp and angular
grains and shall pass through a screen of 5 mm square mesh
Cement - answer-normally used for plain cement concrete.
should conform to the specifications and shall have the required tensile and
compressive stresses and fineness.
(P.P.C) - answer-Portland Pozzolana cement
Water - answer-shall be clean and reasonably free from injurious quantities of
deleterious materials such as oils, acids, alkalis, salts and vegetable growth.
Water - answer-potable water shall be used having a pH value not less than 6.
Volume Batching - answer-in __________________ coarse aggregate and sand shall
be measured by measuring box of 30cmx30cmx38cm of a suitable size equivalent to
one bag cement of 1/30 m3or 0.035 m3.
Lightweight aggregate concrete - answer-produced using a variety of lightweight
aggregates
Foamed concrete - answer-workable, low-density material
, can incorporate up to 75 per cent entrained air
Lightweight structural concrete - answer-can be used for structural applications
with strengths equivalent to normal weight concrete.
Autoclaved aerated concrete (AAC) - answer-first commercially produced in 1923 in
Sweden
been used on all continents and every climatic condition
can also be sawn by hand, sculpted and penetrated by nails, screws and fixings
HIGH DENSITY CONCRETE - answer-This type of heavyweight concrete has a greater
density than other types and is manufactured using crushed rocks as coarse aggregate
Reinforced concrete (RC) - answer-a versatile composite and one of the most widely
used materials in modern construction.
To increase its overall strength, steel rods, wires, mesh or cables can be embedded in
concrete before it sets (or laid before the concrete is poured)
PRECAST CONCRETE - answer-a form of concrete that is prepared, cast and cured
off-site, usually in a controlled factory environment, using reusable moulds
PRESTRESSED CONCRETE - answer-a structural material that allows for
predetermined, engineering stresses to be placed in members to counteract the
stresses that will occur when they are subject to loading
GLASS REINFORCED CONCRETE - answer-a construction material that is commonly
used to form exterior cladding panels.
GRC
AIR-ENTRAINED CONCRETE - answer-plain concrete that contains microscopic air
bubbles
air bubbles create chambers for water to expand into when it freezes
SELF-COMPACTING CONCRETE - answer-a non-segregating concrete that can flow
under its own weight
SMART CONCRETE - answer-concrete that offers an alternative method for monitoring
the health of reinforced concrete structures.
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