Discussed concrete materials Like Cement, Water, Aggregate and Also the Summary of the Mix Design Concept

1. CONCRETE
TECHNOLOGY
1

2. INTRODUCTION
•Concrete is a composite material composed of fine
and coarse aggregate bonded.
•Together with a fluid cement (cement paste) that
hardens over time.
2

3. COMPOSITION OF CONCRETE
•Cement
•Water
•Aggregates
•Reinforcement
•Chemical admixtures
•Mineral admixtures and blended cements
3

4. CEMENT
•Portland cement is the most common type of cement
in general usage. It is a basic ingredient of concrete,
mortar and many plasters.
•British masonry worker Joseph Aspdin patented
Portland cement in 1824.
•It was named because of the similarity of its colour to
Portland limestone, quarried from the English Isle of
Portland and used extensively in London architecture.
4

5. Test for cement
5
Test Apparatus
Specific gravity of cement Lechatelier flask
Standard consistency of
cement
Vicat’s apparatus
Initial and final setting time of
cement
Vicat’s apparatus
Soundness of cement Lechatelier apparatus

6. 6

7. CEMENT
Sl.
No
Types of cement IS code
Compressive strength
3 days 7 days 28 days
1 OPC 33 IS 269:19889 16 22 33
2 OPC 43 IS 8112:1982 23 33 43
3 OPC 53 IS 12269:1987 27 37 53
7

8. TYPES OF CEMENT
•Portland Pozzolona Cement
•Rapid Hardening Portland Cement
•White Cement
•Blast furnance slag cement
•Low heat cement
8

9. CEMENT
•Sulphate Resisting Cement
•Coloured Cement
•Expansive Cement
9

10. CEMENT
•Hydrophobic Cement
•High Alumina Cement
•Quick Setting Cement
10

11. WATER
•Combining water with a cementitious material forms
a cement paste by the process of hydration. The
cement paste glues the aggregate together, fills voids
within it, and makes it flow more freely.
11

12. AGGREGATES
•Fine and coarse aggregates make up the bulk of a concrete
mixture. Sand, natural gravel, and crushed stone are used
mainly for this purpose.
•Recycled aggregates (from construction, demolition, and
excavation waste) are increasingly used as partial
replacements for natural aggregates, while a number of
manufactured aggregates, including air-cooled blast furnace
slag and bottom ash are also permitted.
12

13. AGGREGATES
•Rounded
•Irregular
•Angular
•Flaky
•Elongated
13

14. ADMIXTURES
•Accelerators
•Retarders
•Air entraining agents
•Plasticizers
•Corrosion inhibitors
14

15. CONCRETE
Grade Concrete Mix
M 10 1:3:6
M 15 1:2:4
M 20 1:1.5:3
M 25 1:1:2
15

16. IS MIX DESIGN
16

17. DESIGN PROCEDURE
1. Target Mean Strength
2. Selection of W/C Ratio
3. Selection of Water Content
4. Calculation of Cement Content
17

18. DESIGN PROCEDURE
5. Volume of Coarse Aggregate
6. Mix Calculation
7. Mix Proportioning / Result
18

19. 1. Target Mean Strength
19

20. 1. Target Mean Strength
20

21. 2. Selection of W/C Ratio
21

22. 3. Selection of Water Content
22

23. 3. Selection of Water Content
23

24. 4. Calculation of Cement Content
24

25. 5. Volume of Coarse Aggregate
25

26. 5. Volume of Coarse Aggregate
26

27. 6. Mix Calculation
27

28. 6. Mix Calculation
28

29. 7. Mix Proportioning / Result
29

30. THANK YOU…
30