+ concrete belkis campos 12-01145. cristina dávila 12-11145
TRANSCRIPT
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ConcreteBelkis Campos 12-01145.Cristina Dávila 12-11145.
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Content1.What is Concrete?
2.Historical Background
3.Properties
4.Advantages & Disadvantages
5.Some Concrete-made Structures all over the world
6.Sources
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What is Concrete?
Agregate Cement Water
SandGravel
LimestoneGranite
Binder that holds and draws everythingcohesively
Concrete’s principalstrength
determinant
+HistoricalBackground
"concretus”
(compact or condensed)
Concrete
Known Occurrence:
Human and
Concrete:
12 million years ago
3000
years Lime (calcium
oxide): primary cement-
forming, agent until the early
1800s.
1824: Creation of Portland Cement, by Joseph Aspdin. The dominant cementing agent used in concrete production.
1849: Invention of Reinforced Concrete by Joseph Monier.
Egyptians: Similar substance to modern
concrete. Lime and gypsum as binders.
Assyrians and Babylonians: Clay as a bonding substance. The
Assyrian Jerwan Aqueduct (688 BC, waterproof concrete)
Greeks: Concrete with lime and pebbles. Royal palace of
Tiryns. (1400-1200 BC) (Heinrich Schliemann)
Romans: used concrete made from quicklime,
pozzolana and pumice (300 BC to 476 AD). New wave of
Roman Architecture.
Anci
ent
Civ
iliza
tions
Egyptians: Similar substance to modern
concrete. Lime and gypsum as binders.
Assyrians and Babylonians: Clay as a bonding substance. The
Assyrian Jerwan Aqueduct (688 BC, waterproof concrete)
Greeks: Concrete with lime and pebbles. Royal palace of
Tiryns. (1400-1200 BC) (Heinrich Schliemann)
Romans: used concrete made from quicklime,
pozzolana and pumice (300 BC to 476 AD). New wave of
Roman Architecture.
Anci
ent
Civ
iliza
tions
Properties
Reinforced concrete is the most common form of concrete. The
reinforcement is often steel, rebar and other materials
The density of concrete is around 2,400 kg/m³
Low coefficient of thermal expansion, and as it matures
concrete shrinks.
Concrete that is subjected to long-duration forces is prone
to creep.
Different mixes of concrete ingredients produce different
strengths
High compressive strength but lower tensile strength.
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Strength and Durability
Versatility
Low Maintenance
Affordability
Thermal mass
Locally produced and used
Albedo effect
Low life-cycle CO2 emissions
Low tensile strength
Low ductility
Susceptible to cracking
AdvantagesDisadvantag
es
MoreAdvantages
thanDisadvantages
+ UseThe amount of concrete used
worldwide, ton for ton, is twice that of
steel, wood, plastics, and aluminum combined.
Concrete's use in the modern
world is exceeded only by the use of
water
Mass
Structures
Textures
Architectural Structures
Infrastructure
Walls
Bridges
Pavements
+ Some Concrete-made
Structures all over the Globe
1
4
2
3
1- Jubilee Church. Rome, Italy2- Ingalls Building. Cincinati, USA3- Bus Stop. Stockholm, Sweden4- Alamillo Bridge. Sevilla, Spain
Concrete has been and is
nowadays the preferred
construction material for
architects and engineers
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Sources1.http://www.britannica.com/EBchecked/
topic/131278/concrete
2.http://www.wbcsdcement.org/index.php/key-issues/sustainability-with-concrete/properties-of-concrete
3.http://en.wikipedia.org/wiki/Concrete
4.http://civilengineersforum.com/concrete-advantages-disadvantages/