COMPRESSIVE STRENGTH TEST OF DIFFERENT CEMENTS.pptx

compreesive Strength Test of Cement By CTM

1. RAJKIYA ENGINEERING COLLEGE KANNAUJ COMPRESSIVE STRENGTH TEST OF DIFFERENT CEMENTS SUBMITTED BY- RANJIT KUMAR (2008390000051 ) RAJNEESH KUMAR MAURYA (2008390000050 ) DEPARTMENT OF CIVIL ENGINEERING RAJKIYA ENGINEERING COLLEGE KANNAUJ-209732 Under the supervision Of Mr. Rishabh Kashyap Mr. Mukul Saxena

2. INTRODUCTION ● The compressive strength is one of important properties of cement. C ompressive strength test, mechanical test measuring the maximum amount of compressive load a material can bear before fracturing. The test piece, usually in the form of a cube, prism or cylinder, is compressed between the platens of a compression-testing machine by a gradually applied load.

3. Continued…. The compressive strength test of cement is done because, with an increase in compressive strength of cement strengths such as flexural strength, resistance to abrasion, and so on also increases. With one test we can determine various aspects of cement and can decide the suitable types of cement for the construction site.

4. Factors Affect the Compressive Strength of Cement Water Cement Ratio Cement Sand Ratio Type and grade of Sand Manner of Mixing Shape and Size of the Specimen Curing Condition Rate of Loading

5. Compressive Testing Machine Compression test machines are universal testing machines specially configured to evaluate static compressive strength characteristics of materials, products, and components. These tests are typically conducted by applying compressive pressure to a test specimen using platens or specialized fixtures with a testing machine that produces compressive loads.

6. OBJECTIVE ●The broad objective of the project was set to study various known brands of cement available in market w.r.t . the strength development of cement prepared by their use. ● To determine the compressive strength of different types of cement.

7. FLOW CHART

8. METHODOLOGY The ratio of cement and sand that should be taken to carry out the test should be 1:3. Let us take 200 gm of cement, then 600 gm of sand should be taken. They should be mixed thoroughly for 1 minute. Then the calculation of water required to make a standard consistency is calculated using the formula: Where P is the percentage of water required for producing a paste of standard consistency.

9. Continued… Then we have P=30 for Cement. Putting the value of P in the above equation, we get the amount of water = 84 gm. 84 gm of water is added to the dry mixture and mixed properly for three minutes. The cube mould is assembled and placed on the table of the vibrating machine. Then the mould oil is applied in the mould and the mortar is poured in the mould. The mould is then prodded with a rod. Then vibration is applied in the rate of 12000 ± 400 per minute.

10. Continued… After 10 minutes, the mould together with the base plate is removed from the machine and the top surface is finished levelling up with the help of a trowel. Now, the above process is repeated for the next 9 cubes.

11. Continued… After 24hrs, open the moulds and immerse the concrete cubes in a water basin for 3 days, 7 days or 28 days.

12. Continued… The cubes are placed in the compression testing machine Carefully centre the cube on the lower platen and ensure that the load will be applied to two opposite cast faces of the cube. Without shock, apply and increase the load continuously at a nominal rate within the range of (0.2 N/mm2.s to 0.4 N/mm2.s or 35 N/mm².min) until no greater load can be sustained. The load at which the cube is crushed is noted. The average compressive strength of three cubes is the final compressive strength of the cement. Then compressive strength for each cube on their respective test day is calculated using the formula:

13. COMPRESSIVE STRENGTH OF BIRLA UTTAM CEMENT AGE OF CUBES (In Days) COMPRESSIVE STRENGTH in MPa 3 32.8 7 43.2 28 63.7

14. COMPRESSIVE STRENGTH OF AMBUJA CEMENT AGE OF CUBES (In Days) COMPRESSIVE STRENGTH in MPa 3 29.4 7 38.8 28 49.3

15. COMPRESSIVE STRENGTH OF ULTRA TECH CEMENT AGE OF CUBES (In Days) COMPRESSIVE STRENGTH in MPa 3 38.6 7 50.8 28 71.6

16. COMPRESSIVE STRENGTH OF ACC CEMENT AGE OF CUBES (In Days) COMPRESSIVE STRENGTH in MPa 3 25.7 7 35.3 28 50.1

17. PRECAUTION The temperature of the room and cube should be maintained 27±2ºC. The water used for curing should be changed every 7 days. The cube should not be dried before the completion of the compressive strength test. If the mixture of cement, sand and water does not obtain uniform colour within 4 minutes of mixing, then the mixture should be discarded and the operation should be started from the start. Compressive strength depends upon the proportion and properties of raw materials used. So, the raw materials should be selected carefully.

18. CONCLUSION Thus we find out that the compressive strength of Ultra Tech Cement is greater than other three cements. Hence we find that Ultra Tech Cement is better than Birla Uttam , Acc, Ambuja cement in comparison of compressive strength.