Super Plasticizer effects on Workability and Mechanical Properties of Concrete

1. Super Plasticizer effects on Workability and Mechanical Properties of Concrete International Conference on Mathematical Sciences in Engineering 2017 MrBiswa Mohan PattanaikMTech Scholar Prof (Dr ) M. K. Rath, Professor Civil Engineering Department Centurion University of Technology & Management Bhubaneswar

2. Outline of Presentation • Introduction • Review of Literature • Aim & Scope of Present Investigation • Experimental Procedure • Results & Discussion • Conclusion • References

3. Introduction • Superplasticizer which is also known as high range water reducers and chemical admixtures mainly three different types of superplasticizer are used to have better workability and mechanical properties of concrete • Sulphonated Naphthalene Formaldehyde (SNF) • Poly Carboxylate Ether (PCE) • Modified Poly Carboxylate Ether (MPCE)

4. Review of Literature • K Evangeline and Neelamegam M (2014) studied the effect of superplasticizer on workability and mechanical properties of self-Compacting concrete • Noda Y, Hosoda T, Tsuda H, Matsui K, Komatsu M (2014) Application of powder superplasticizers in japan and southeast asian countries • Muhit I. B (2013) Dosage limit determination of superplasticizing Admixture and Effect Evaluation on Properties of Concrete • Gaywala N R and Raijiwala D B (20111)Self compacting concrete a concrete of next decade

5. Review of Literature • Dumne S M (2012) experimentally observed the effects of superplasticizer on Fresh and Hardened Properties of self-compacting concrete containing Fly Ash • Alsadey S (2015) Effects of Superplasticizer on Fresh and Hardened Properties of Concrete

6. Scope of Present Investigation • The use of how the super plasticizers permits the reduction of water to an extent up to 30percentage without reducing the workability

7. Experimental Procedure comparative view on the behaviour of the different superplasticizer used TABLE 2 TEST VALUES FOR SLUMP FLOW TEST Slump flow test The slump flow test is done to access the horizontal flow of concrete in the absence of obstruction TEST VALUES FOR SLUMP FLOW TEST

8. T500mm slump flow test state that T500mm time may be 2 to 5 seconds • Flow table test at T500mm indicates the rate of flow within a defined flow distance When the slump cone is lifted, start the stop watch and find the time taken for the concrete to reach 500mm mark

9. Workability Retention Test • When concrete is to be designed for M40 then admixture are preferred

10. Results: slump value for fresh concrete with different percentage of admixture

11. compressive strength of concrete

12. Target strength Although concrete develops strength beyond 28 days. Earlier codes have not been permitting to consider that this strength in the design. The increase in strength beyond 28 days is used to get immersed with the factor of safety and make the structure more economical. The first step to mix design calculation is the target strength, which according to IS 10262:2009

13. Discussion • Water Reduction – Reduces water requirement for getting high slump in concrete thus gives high strength concrete with reduced permeability. • Workability – Improves workability of freshly mixed cement concrete. Allows easier compaction leading to denser concrete and superior finish • Durability – Increases durability by improving cohesiveness of concrete • Superior plasticising effect, resulting in improved flow, placing and compaction • Chloride free – does not attack reinforcement

14. Comparison values of % of admixture

15. Conclusion • super plasticizer as per code IS 10262-2009 up to the maximum i.e 0.5 percentage to 3 percentage without changing the water cement ratio. • The compressive strength for normal concrete gives good strength but when we increase the dosages or percentage of super plasticizer from 0.5 percentages to 3 percentages the compressive strength increased from the normal concrete to dosage mixed concrete • But the increase in strength by adding super plasticizer is limited for certain percentage. There is a limit to add super plasticizer if we increase the dosage it affect the strength of concrete • in 0.9 percentage of admixture it give good compressive strength but in 3 percentage it decrease the compressive strength • .

16. References [1] K Evangeline and Neelamegam M “effect of superplasticizer on workability and mechanical properties of self-Compacting concrete” Journal of Mechanical and Civil Engineering, Vol. 2320-334X, pp. 18-29, 2014 [2] Noda Y, Hosoda T, Tsuda H, Matsui K, Komatsu M “ Application of powder superplasticizers in japan and southeast asian countries” Journal of Thailand Concrete Association, vol 2 (1), pp 1-7, 2014 [3] Muhit I. B “Dosage Limit Determination of Superplasticizing Admixture and Effect Evaluation on Properties of Concrete” International Journal of Scientific & Engineering Research vol4 (3), pp-1-5, 2013 [4] Gaywala N R and Raijiwala D B “Self compacting concrete a concrete of next decade” Journal of Engineering Research and Studies, Vol II (IV), pp.0976-7916,2011

17. References [5] Dumne S M “Effect of Superplasticizer on Fresh and Hardened Properties of Self-Compacting Concrete Containing Fly Ash” American Journal of Engineering Research Vol 3(3), Pp-205-211 [6] Alsadey S “Effect of Superplasticizer on Fresh and Hardened Properties of Concrete” Journal of Agricultural Science and Engineering, Vol 1(2), pp. 70-74, 2015 [7] IS 516: 1959 – Methods of test for strength for coarse and fine aggregates from natural sources for concrete [8] IS 456: 2000 – Plain and reinforced concrete [9] IS 1199: 1959 – Methods of sampling and analysis of concrete [10] IS 2386 : 1963 – Methods of test for aggregates for concrete [11] IS 10262: 2009: Guidelines for concrete mix design proportioning.

18. THANK YOU