Done by Scientists group at Albayan Independent school for Girls. Under supervision from AL-Bairaq

1. AL-Bairaq
IamDiscoveringMaterials–Cycle12th
Concrete
Albayan Scientists
Fatma Alkuwari Nada Essam
Madawi Alsubaie MozaAlsubaey

2. • Introduction – what is concrete?
• Activity 1: Hunting For Objects Made Of
Concrete.
• Activity 2: Comparing Different Kinds Of
Cement.
• Activity 3: Comparing Different Concrete
Formulations.
• Activity 4:Testing Concrete Samples.
• Design Project: Reinforcing Concrete (E+)
• Product Idea ( Life without negative
electrons and free radicals )

3. -Concrete is a mixture of cement , water and
aggregates, when poured in a mold it will take
the shape of the mold.
-Concrete is the most commonly used
infrastructure material.
-It is formable, durable, strong and
inexpensive.

4. • What makes this infrastructure material so
useful?
1concrete is formable.
2 concrete is strong .
3 concrete is durable (That means it lasts a long
time) .
4 concrete is inexpensive to use (That is because
water , sand, and gravel are abundant in many
parts of the world).
• Concrete is used for (Roads , sidewalks ,
building , bridges and much more).

5. Results:
•concrete has many uses .
•One of the reasons concrete is so
versatile is that it can harden into
various shapes.

6. •When water is mixed with cement react
chemically in a process called hydration
(Means the reaction is exothermic).

7. • Salt: to make the cement harden faster because low
temperature decrease is hardening rate .
• Sugar: makes Portland cement harden mora slowly.
Cups cement water salt sugar
A 200g 100ml 0 0
B 200g 100ml 6g 0
C 200g 100ml 0 1g

8. In a beaker, make a
50g of fine aggregete
(sand), and 50g of
coars aggregete
(gravel) .
In a beaker, was
added 100g of fine
aggregate (sand).
In a beaker, was
added 100g of
coarse aggregate
(gravel).
In a beaker ,
70g of coarse
aggregate
(gravel).

9. Activity 3: Comparing Different Concrete
Formulations.(making cement and concrete formulation and calculating their
densities).
Assigned
formulation
Coarse
Aggregate
(g)
Fine
Aggregate
(g)
Potland
Cement
(g)
Water
(ml)
D 120 120 60 27
E 120 120 60 30
E+ 120 120 60 30
The diffrenet between E and E+ that we
added in E+ 3 diffrenet kind of metals
between the mixture to be strong
enough in using it.
D 1.6kg E 2.7kg E+ 6.6kg
Each sample carrys:

10. Activity 4 : Testing Concrete Samples ( test the strengths of
concrete samples and then compare)
In this activity samples has been tested that
were made in activity 3 , the most important
factor is the ratio of water to cement (o.35 to
0.75)that ratio used for most purposes.

11. Is concrete stronger or weaker than cement?
Cement is a brittle material , strong in compression and weak in
tension.The concrete that made with fine aggregates only is
stronger.
.Cement is very
caustic (PH=13)
.Aluminum may
react explosively
with concrete
under some
condition .

12. Final Project:
Life without negative charge and free radical.
For the negative charges bad effects on
the humans body and it should be
decreased from building such as:( Amal
hospital).

13. Final Project:
Life without negative charge and
free radical.
Create a concrete that is made of
positive magnates to attract negative
charge in places that shouldn’t include
negative charge that can affect the
humans health.

14. Final Project:
Life without negative charge and free radical.
( the side effects of the negative charge).
• What is a free radical?
A free radical, is simply an atom which had an odd number of
electrons in its outer shell.
• How do negative charge and free radical effects on
the human body?
It has not been fully elucidated yet. It has been said that
negatively charged electricity which free radical posses or the
chemical properties work on the human body.

15. • Methods and materials:
in the product these materials has been used :
1- cement
2- Magnate
3-water
4- (Nails)
5-fine aggregate

16. Water has been added to the cement and fine aggregate then
magnet was added.

17. Life without negative charge
and free radical (result)
•The manufactured
concrete with
magnate could
withdraw the harmful
negative charge,

18. Life without negative charge and
free radical.
(Results)
The concrete attraced iron filings ,
wich are considered as negative
charges.

19. Many thanks to our school and AL-Bairaq team from Center
forAdvanced Materials (CAM), Qatar University for
supporting us during our journey with AL-Bairaq.
Also, we would like to thank the sponsors UNESCO, Qatar
National Commission, Ras Gas and Shell.