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ASSOC.PROF.DR. Erhan GUNEYSI

Supervised by

Prepared by

Samadar S. Majeed

A seminar about:

( Effect Of Artificial Slag and Fly Ash Aggregate

On Engineering Properties Of Concrete )

Contents of Seminar :

1- Introduction

2- Materials

• Slag

• Fly Ash

3- Specimen

4- Tests

1- Introduction:

• My Thesis About Making Concrete With three Different types of

aggregate which are : cold bounded fly ash, Slag and Natural gravel .

Concrete with lightweight aggregates have certain properties that are

noticeably different from types with normal weight aggregates. In

addition to low unit weight, better reinforcing steel-concrete bond ,

durability performance ,tensile strain capacity and fatigue resistance

make it preferable in construction industry . However , the wide

diversity of the lightweight aggregate source and manufacturing

process result in distinctive behaviour among the lightweight

aggregate based concretes. therefore, properties of concrete should

be investigated independently for each type of lightweight aggregate.

in the current study , the performance of concrete with cold bounded

fly ash and slag aggregate will be investigated

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2- Materials

Slag :

•Air-cooled blast-furnace slag is a lump ore manufactured from

molten from blast-furnace slag by air-cooling and appropriate water

spraying. The product is then crushed and screened in accordance

with the specified application and sold as materials for road base

course material, rock fiber, coarse concrete aggregates and cement

clinker raw materials.

• Slag is sometimes erroneously classified as industrial

waste. In fact, this co-product can be recycled into

valuable, versatile construction materials for green use.

We utilize slag, a by-product of steelmaking, in versatile

construction material for environmentally beneficial use.

Applications include road construction, asphalt, ready-

mix concrete, cement, railways ballast, mining, filtration

and agriculture.

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Fly Ash

• Fly ash : is a byproduct from burning pulverized coal in

electric power generating plants. During conbustion,

mineral impurities in the coal (clay, feldspar, quartz, and

shale) fuse in suspension and float out of the combustion

chamber with the exhaust gases. As the fused material

rises, it cools and solidifies into spherical glassy particles

called fly ash. The fine powder resemble portland

cement but it is chemically different.

• Two types of fly ash are commonly used in concrete

industry: Class C and Class F. Class C are often high-

calcium fly ashes with carbon content less than 2%;

whereas, Class F are generally low-calcium fly ashes

with carbon contents less than 5% but sometimes as

high as 10%. In general, Class C ashes are produced

from burning sub-bituminous or lignite coals and Class F

ashes bituminous or anthracite coals.

•Lightweight aggregates have a

particle density of less than 2.0 g/cm³

or a dry loose bulk density of less

than 1.1 g/cm³, as defined in ASTM

specification C330. Normal weight

aggregates from gravel, sand, and

crushed stone, for example, generally

have bulk specific gravities of from

about 2.4 to about 2.9 (both oven dry

and saturated surface dry), and bulk

densities of up to about 1.7 g/cm³

Pelletization process

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3- SPECIMENS :

•We prepare (5) cubic molds with (150x150x150)mm dim.

• We prepare (5) cylindrical molds with (100x200) mm dim.

• We prepare (3) prism molds with (500 mm in length and

100 mm x 100 mm) in cross section.

•We prepare one cylindrical mold with (150 x 300) mm dim.

4-TESTS

1. Compressive Strength Test:

The compressive strength tests of lightweight

concrete will be done according to ASTM C

39. The tests will be done on 150x150x150

mm cubes at 28th day. Three specimens will

be used to get compressive strength and

average of them will be used.

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The Modules of Elasticity tests

of lightweight concrete will be

done according to ASTM. The

tests will be done on

(150x150x150) mm cubes at

28th day. two specimens will be

used to get modules of

elasticity and average of them

will be used.

2- Modules of Elasticity :

3-Splitting Tensile Strength Test

The splitting tensile strength of lightweight

concrete will be done according to ASTM C

496. This test will be done on the (100x200

mm) cylindrical specimens at 28th day. Three

specimens will be used to get splitting tensile

strength and average of them will be used. The

strength will be calculated by following

formula.

• Calculation of Splitting Tensile

Strength

σ =

σ = Splitting Tensile Strength (MPa)

P = Load (N)

d = Diameter (mm)

L = Length (mm)

4- Sorptivity Test :

• The Sorptivity tests of

lightweight concrete will be

done according to ASTM. The

tests will be done on two

cylindrical specimens with

(50x100) mm at 28th day.

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5- RCPT Test :

• The RCPT test of

lightweight concrete will

be done according to

ASTM. The tests will be

done on two cylindrical

specimens with (50x100)

mm at 28th day.

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6- Gas Permeability

• The Gas Permeability of

lightweight concrete will be

done according to ASTM.

The tests will be done on

two cylindrical specimens

with (50x150) mm at 28th

day.

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7- Water Penetration Test

• The Water Penetration Test

of lightweight concrete will be

done according to ASTM.

The tests will be done on one

cubic specimen with

(150x150) mm at 28th day.

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8- Fracture Test

• Fracture test in the light

weight concrete will done

according to ASTM. It will

be done on three prism

specimens with

(100x100x500)mm dim.

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