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Construction Materials Mohammed Hilal Al-Ismaily 12s10125
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Material of construction - concrete

Jan 22, 2018

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Page 1: Material of construction - concrete

Construction MaterialsMohammed Hilal Al-Ismaily

12s10125

Page 2: Material of construction - concrete

One of the most important material used on constructions.

One of the widest used construction material wide-world.

Can be placed and molded into any shape.

The United States almost uses this material twice as any otherconstruction materials combined. (

What do think it is ?

Page 3: Material of construction - concrete

ConcreteLauran Stimac , 2003

Page 4: Material of construction - concrete

Main Points

Concrete Definition

Concrete Uses

Concrete Properties

Concrete types

Concrete Problems

Page 5: Material of construction - concrete

First - Concrete Definition

• Concrete is:

Composed mainly of cement, aggregate, water, and chemical admixtures.

A powdery substance made with lime and clay.

Sand, gravel and crushed stone.

Joel Sartore , 2014

Page 6: Material of construction - concrete

Second - Concrete Uses

• Used to :

Make pavements, pipe, structures, foundations, roads, bridges/overpasses, walls and footings for gates.

Page 7: Material of construction - concrete

Concrete Properties

• Concrete has :

High compressive strength , low tensile strength.

Elasticity of concrete is relatively constant at low stress levels but starts decreasing at higher stress levels as matrix cracking develops.

Concrete structures will crack to some extent, due to shrinkage and tension.

Page 8: Material of construction - concrete

Concrete Types

• There are various types of concrete for different applications that are created by changing the proportions of the main ingredients.

• The mix design depends on the type of structure being built.

• The are more than 20 type of concrete.

Page 9: Material of construction - concrete

Fifth - Concrete Problems

Problem #1: Plastic Shrinkage

• Plastic shrinkage occurs when a high rate of water evaporates from the concrete surface and is affected by :

• temperature, humidity, velocity and temperature of concrete.

Problem #2: Crazing

• Crazing is caused by rapid moisture loss.

SERKAN KOÇ,2003

Page 10: Material of construction - concrete

Concrete Definition• Water + Cement + Aggregate

Concrete Uses• Structures / Foundations / Pipes …

Concrete Properties• High compressive strength / Elasticity

Concrete types• More than 20 types

Concrete Problems• Plastic Shrinkage / Crazing

Page 11: Material of construction - concrete

oWebo Smith.(June 2007).Construction Aggregate ,Mining Engineering

Retrieved 2015-10-23

o Miller, F. MacGregor(Oct ,2013) "Quality Protocol for Aggregates”Aggregain.org.uk. Retrieved 2015-10-23

oBooks

o J. C. Hayes, and H. M. Mann. 1954. Permeability of portland cement paste

o Nelson Bolen (June 2008). "Construction Aggregates”

Page 12: Material of construction - concrete

Questions