Seminar Presentation LWAC (Flyash + Slag)

1
A seminar about:
( Effect Of Artificial Slag and Fly Ash Aggregate
On Engineering Properties Of Concrete )
Supervised by
ASSOC.PROF.DR. Erhan GUNEYSI
Prepared by
Samadar S. Majeed

 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

4
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.
5

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

10
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.

12
2- Modules of Elasticity :
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.

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.
15

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.
16

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.
17

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.
18

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.
19

Seminar Presentation LWAC (Flyash + Slag)

More Related Content

What's hot (20)

Viewers also liked (20)

Similar to Seminar Presentation LWAC (Flyash + Slag) (20)

Recently uploaded (20)

Seminar Presentation LWAC (Flyash + Slag)