PRESENTATION for RDS.pptx is a part of thesis

PART OF RESEARCH PAPER

1. Sl. No. Parameter Value (%) 1 SiO2 50.22 2 Al 2 O 3 29.61 3 Fe 2 O 3 10.72 4 Sodium oxide as Na 2 O 0.25 5 Sulphur trioxide as SO 3 0.65 6 CaO 3.77 7 MgO 1.30 8 TiO 2 1.76 9 P 2 O 5 0.53 10 K 2 O 0.54 11 Loss on ignition 0.80 Table 1 . Chemical composition of Fly ash 1

2. Sl . No. Parameter Value (%) 1 SiO2 34.28 2 Al 2 O 3 13.84 3 Fe 2 O 3 0.54 4 Sodium oxide as Na 2 O 0.69 5 Sulphur trioxide as SO 3 1.83 6 CaO 36.77 7 MgO 9.01 8 TiO 2 0.42 9 P 2 O 5 0.04 10 K 2 O 0.21 11 Loss on ignition 0.83 Table 2 Chemical composition of GGBS 2

3. Sl No. Parameters Value   1 Specific gravity 3.05   2 Fineness of cement 4.3%   3 Standard Consistency 29.5%   4 Initial setting time 84 minutes   5 Final setting time 327 minutes.   Cement Ordinary Portland Cement of 53-grade has been used for making cement concrete and its physical properties are given in Table 3 3

4. Chemical properties of Cement 4

5. Sl. No Material Value 1 Water 158 kg 2 OPC 400 kg 3 Fly ash 0 kg 4 Fine aggregate 638 kg 5 Coarse aggregate 1172 kg 6 Admixture 2.8 kg 7 W/b ratio 0.40 Table 4 Mixture proportion for one cubic meter of control cement concrete 5

6. Table 5. Mixture proportion for one cubic meter of geopolymer concrete 6

7. 7

8. One way ANOVA test was performed and summary of the results are presented in Table 7 Table 7 ANOVA test results (Bond stress) 8

9. Table 8. Salient parameters out of the Regression analysis (effect of temperature on bond stress of concrete containing fly ash) 9

10. Based on the regression analysis, following equation has been proposed to predict the bond stress of concrete after exposure to elevated temperatures   f b = f bo – (0.008*T) – (0.091 P fa ), 28 < T < 800, (4.1) and 0 < P fa < 25. Where f b = bond stress of concrete exposed to a temperature of T ° C. f bo = Bond stress of OPC concrete without fly ash at ambient temperature in MPa . T = Temperature of exposure in ° C. P fa = Percentage of fly ash. 10

11. Different code of practices proposes equation to calculate the design bond stress of concrete and some of such equations are presented in Table 9 Table 9 Equations for bond stress by different Code of Practices 11

12. Table 10 Bond stress of geopolymer concrete specimens after exposure to elevated temperatures 12

13. Table 11 Bond stress of geopolymer concrete specimens at a slip of 0.025mm and 0.25 mm after exposure to elevated temperatures 13

14. Table 12 Ratio of the critical bond stress to the ultimate bond stress of test specimens 14

15. Fig: 29 SEM analysis results of geopolymer concrete F50GPNA and OPCCA after exposure to elevated temperatures- Typical 15

16. One-way ANOVA test was performed on bond stress and compressive stress and the results are presented respectively in Tables 13 and 14. Table 13 Results of the ANOVA conducted on bond stress of geopolymer concrete 16

17. Table 14 Salient parameters out of the Regression analysis (effect of temperature on bond stress of geopolymer concrete containing fly ash) 17