BTech Module 1 - Concrete
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46 Terms
concretus
From latin word “_________” meaning compact or condensed.
Concrete
• A versatile construction material
• Mixture of Portland cement, water and aggregates (filler) and in some cases, chemical admixtures.
Hydration
It solidifies and hardens after mixing with water and placement due to a chemical process known as?
man-made rock
The water reacts with cement, which bonds the other components together, eventually creating a stone-like material. Also known as?
6500 BC
The year Nabatean culture uses concrete to build houses
Pozzolana cement
The Romans used what type of cement to build baths, harbors, The Colosseum and The Pantheon?
800 BC-300 AD
The year the Greeks use lime mortars to produce to produce concrete
1824
The year where a method for producing cement was patented by Joseph Aspdin
Joseph Aspdin
In 1824, a method for producing cement was patented by?
1849
On what year was the reinforced concrete was invented by Joseph Monier?
Joseph Monier
The reinforced concrete was invented by?
1891
The year where the first concrete in America was built by George Bartholomew in Bellefontaine, Ohio.
George Bartholomew
he invented the first concrete in America in Bellefontaine, Ohio
1930-1936
The year Air Entraining, Fly Ash and Ready Mix was introduced
1930-1936
The year the construction on the Hover Dam was completed
1956
The year Fiber reinforcement in concrete was introduced.
1975
The year Silica fume was introduced as a pozzolanic additive
Silica fume
It was a fume that was introduced on 1975 as a pozzolanic additive
1976
The year the Water Tower Place opens the tallest reinforced concrete building in the world at time.
2009
The year the 2717 ft. tall Burj Khalifa is named world’s tallest building
2010
The year worldwide Portland cement production reaches 3.3 Billion Metric Tons
2013
The year China used more cement between 2011 and 2013 than the US used in the entire 20th Century.
Water
It is a composition of concrete where it is essential for quality concrete.
Water
The strength and other properties of concrete are highly dependent on the amount of _____ and the _____ cement ratio
Aggregates
It is a composition of concrete where it occupy 60-80% of the volume of concrete
Sand, Gravel, Crushed Stones
____, ______, & ________ ______ are the primary aggregates used.
silt, organic matter.
All aggregates must be essentially free of ____ &/ _______ ______
Chemical Admixtures
It is a composition of concrete where __________ ingredients other than Portland cement, water and aggregates.
Chemical Admixtures
It is a composition of concrete where it is added to the concrete mixture immediately before or during mix
Accelerators
It is a type of chemical admixture that increases setting property of concrete mix, and strength very much.
Accelerators
It is a type of chemical admixture that is very good as a rapid setting while making marine structures. and also used in cold areas.
Retarders
It is a type of chemical admixture that is able to slow down the chemical reaction between cement and water.
Retarders
It is a type of chemical admixture that gains strength when the mixture of cement transport in long distance place and in hot weather to prevent workability.
Increases plastic shrinkage
The disadvantage of using Retards is that it _________ _______ ________
Air Entraining Agents
It is a type of chemical admixture that uses the air in the form of bubble and distribute throughout the cement paste.
Air entrainers
___ _________ are used when resistance of concrete increases to protect the concrete against freezing.
Air Entraining Agents
It is a type of chemical admixture where by adding this the concrete mix get more ability to work. It also prevents bleeding and segregation
Plasticizers
It is a type of chemical admixture that are used for improving the plasticity of fresh concrete to reduce water content.
Plasticizer
Workability and water cement ratio do not affect because of using ___________
Superplacticizers
It is a type of chemical admixture that is complete different from plasticizer chemically.
Superplacticizers
It is a type of chemical admixture that is most used in the production of high strength company
C3A
___ has a huge effect on superplasticizer
Cement
Crystalline compound of calcium silicates and other calcium compounds having hydraulic properties.
Considered hydraulic because of their ability to set and harden under or with excess water through the hydration of the cement’s chemical compounds or minerals.
Concrete
It is strong in COMPRESSION, as the aggregate efficiently carries the compression load but weak in TENSION.
Reinforced concrete
A type of concrete that solves these problems by adding either metal reinforcing bars, steel fibers, glass fiber, plastic fiber to carry tensile loads.