الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Self-Compacting Concrete (SCC) is a new category of High Performance
Concrete with high workability and flowability but without segregation. This
concrete has the advantages of being cast easily under its own weight without the
need of any external compacting energy. In addition, SCC is made of same
ingredients of Normal Concrete (NC) in addition to extra fine material and special
type of super-plasticizer.
The current research studied the properties of SCC containing different
powders types (fly ash, silica fume and metakaoline) and different aggregate types
(gravel, basalt and dolomite) compared with that of SCC without any powders.
The research program consists of 48 concrete mixes and divided into 6
groups. All mixes were designed to have a constant water/powder ratio of 0.45 and
a constant content of super-plasticizer (sikavisco-crete 5920) of 1.5% by weight of
powder, a trial mixes were done to obtain the previous ratios to ensure the self-
compactability conditions. And all mixes were made from locally available
material.
Fresh properties of SCC were tested and the results indicated that all mixes
satisfied the EFNARC limitations for slump flow time (Tso), slump flow diameter
(D), the L-box height ratio (H2/Hj), and V -Funnel flow time. Also the hardened
properties of SCC were tested and the results indicated that, mixes containing
dolomite as a coarse aggregate gave the highest values for both compressive and
tensile strength on the other hand, mixes containing gravel as a coarse aggregate
gave the lowest values. Also, the results indicated that incorporating FA decrease
the compressive strength at 3 days and show an increase at 28 days , while SF
increase the compressive strength at 3 and 28 days and MK show an increase at
early ages and a slight changes at 28 days. And the incorporation of theses powders
has a little effect on tensile strength.
II
ABSTRACT
Self-Compacting Concrete (SCC) is a new category of High Performance
Concrete with high workability and flowability but without segregation. This
concrete has the advantages of being cast easily under its own weight without the
need of any external compacting energy. In addition, SCC is made of same
ingredients of Normal Concrete (NC) in addition to extra fine material and special
type of super-plasticizer.
The current research studied the properties of SCC containing different
powders types (fly ash, silica fume and metakaoline) and different aggregate types
(gravel, basalt and dolomite) compared with that of SCC without any powders.
The research program consists of 48 concrete mixes and divided into 6
groups. All mixes were designed to have a constant water/powder ratio of 0.45 and
a constant content of super-plasticizer (sikavisco-crete 5920) of 1.5% by weight of
powder, a trial mixes were done to obtain the previous ratios to ensure the self-
compactability conditions. And all mixes were made from locally available
material.
Fresh properties of SCC were tested and the results indicated that all mixes
satisfied the EFNARC limitations for slump flow time (Tso), slump flow diameter
CD), the L-box height ratio (H2/H,), and V -Funnel flow time. Also the hardened
properties of SCC were tested and the results indicated that, mixes containing
dolomite as a coarse aggregate gave the highest values for both compressive and
tensile strength on the other hand, mixes containing gravel as a coarse aggregate
gave the lowest values. Also, the results indicated that incorporating FA decrease
the compressive strength at 3 days and show an increase at 28 days , while SF
increase the compressive strength at 3 and 28 days and MK show an increase at
early ages and a slight changes at 28 days. And the incorporation of theses powders
has a little effect on tensile strength.