Post on 21-Mar-2017
AL-BairaqScience in Sports 5th cycle
Abdulrahman BuhendiBelal Al-AbdullaMohamed Sayed Ahmed Abdullah Ibraheem
Outline
• Introduction• Activity 1: Hunting for Objects Made of Concrete• Activity 2: Comparing Different Kinds of Cements• Activity 3: Comparing Different Concrete
Formulations• Design project: Making concrete ball
Introduction• Definition of concert:
Concrete is a formulation made of mixing cement, water and aggregates together. Concrete is very strong and hence its used in infrastructure
sand Gravel Water cement
Activities 1:Hunting for objects made of concrete
• Objects and structures made out of concrete includes:1. Buildings2. Bridges3. Roads
Activity 2: Comparing Different kinds of Cements
Objectives Make three cement formulations and compare the effect of adding additives on cement hardening
Materials:1. Portland cement2. Water 3. CaCl2
4. Sugar
Results and Conclusion
1. Sample B hardened slower that than the other samples2. Sample C was the first sample to hardened 3. CaCl2 can be used to make the hardening rate of cement faster hence it
is considered as a catalyst
Sample Portland cement g
Water ml Salt CaCl2 g
Sugar g
A 200 100 0 0B 200 100 0 6C 200 100 1 0
Activity 3: Comparing Different Concrete Formulations
• Objectives:Determining the strongest concrete formula based on its density • Procedure :
Activity 3: Comparing Different Concrete Formulations
We measured the density using D=
Type of sample
Mass of sample g
Volume of sample
Density g/
Sample 1 : coarse aggregate
100 72 100/72=1.45
Sample 2: Fine Aggregate
100 67 100/67=1.48
Sample 3: Mixed Aggregate
100 g(50+50)
61 100/61=1.69
Results
ConclusionVolume is inversely proportional to the density which leads to:1-The mixture with the least volume will have high density. 2- The coarse aggregate should to be half the total aggregates
Designing project: Concrete Bowling Ball
• Our target to make a ball that weights less than 5 Kg• Materials used• Cement• Water• Fly ash• Silica• aggregate
Concrete Balling BallTrails
• Two trials
Trail Weight Kg Result
1 7.5 Fail2 5.250 Pass
Material Cement Kg Sand Kg Fly ash g Silica g Water ml
Amount 1.150 2.5 500 550 800
Acknowledgment
Many thanks to my teachers, school and AL-Bairaq team from Center for Advanced Materials (CAM), Qatar University for supporting us during our journey with a AL-Bairaq.
Also, I would like to thank the sponsors UNESCO, Qatar National Commission, Ras Gas and Shell.