WEEK5 Flashcards
Concrete
coarse aggregates, fine aggregates (sand), cement, water, admixture
Portland
cement
Commonly used type
of cement for production of
concrete.
Curing: heat given off (heat
of hydration).
Achieved in
28 days but continues to
grow stronger as curing
progresses on
Cement
most important
building materials, is a binding
agent that sets and hardens to
adhere to building units such as
stones, bricks, tiles, etc.
Composition of cement
Limestone, sand or clay, bauxite
Portland
pulverizing clinker and calcium sulphate
portland type 1
full strength in 28
days without additives
portland type 2
moderate heat emitting;
used for large concrete pours where
less heat is desired during curing
period
portland 3
high early strength which
achieves earlier than Type 1
portland 4
low hear cement like type
2 and releases the least heat during
curing process
portland 5
most expensive, sulphate
resisting
Pozzoland
mixture of Portland
and exact amounts of natural
and artificial pozzolanic
materials (ex. Volcanic tuff,
shales, clay, ash, slag)
Pozzoland type P
high initial
strength before 28 days is not
required; this type however, like
Portland, still meets desired
compressive strength after 28 days
Pozzoland 1P
additives can be added to
achieve optimal compressive and
tensile strength before the 28-day
period
Tagalog of Cast in place
Buhos
Buhos function
Poured directly on site
to provide unlimited
sculptural quality
Slow process since
formwork needs to be
constructed on site too
Cast in place
Made at factory before
transport to job site
Pre-cast concrete
No formworks to fabricate
and removed after
Pre-cast concrete
Can be erected in poor
weather, without waiting
for concrete curing and Transport to site maybe limiting
Pre-cast concrete
Best for repetitive and
consistent components of
the structure
Pre-cast concrete
Cellulose fibers, Portland cement, Silica, Sand, Water, Admixture
Fiber cement concrete
External and internal walling
Cladding
Fascia board
Tile or plank flooring
Ceiling and eaves
Fiber cement concrete
- Can cause shrinkage and
discoloration during curing - Can corrode imbedded
metals like steel bars
Fiber cement concrete
- Increases workability by
protecting it from
freezing - Lightweight and non-
structural - Reduces strength of
mixture
Air-entraining
- to cure/harden more
quickly, reducing
construction time - Allows formworks to be
removed sooner
Accelerating
Slows the hardening or curing time
Retarding
