PSI - Issue 70

Sidhartha Parida et al. / Procedia Structural Integrity 70 (2025) 335–342

341

Table 10: Fresh properties of developed SCC Mix proportions

Compressive strength (N/mm 2 )

Split Tensile (N/mm 2 )

Flexural Strength (N/mm 2 )

7 th Day

14 th Day

28 th Day 7 th Day 14 th Day 28 th Day

28 th Day

MIX-1SCC MIX-2SCC MIX-3SCC

14.73 13.97 14.97

24.65 26.39 28.93

36.76 38.72 41.56

1.12 1.32 1.57

2.12 1.74 1.87

2.4

3.33 3.58 3.61

2.06 2.18

(a)

(b)

(c)

30 25 20 15 10 45 40 35

Split Tensile (N/mm2) 7th day SplitTensile(N/mm2) 14th day SplitTensile(N/mm2) 28th day

41.56

4

MIX-1SCC

MIX-2 SCC MIX-3 SCC

3.61

3

3.58

38.72

3.33

2.5 Split tensile strength ( N/mm 2 ) 2.18 2 1.87 1.74 1.5 1.38 1.12 1 0.5 0

2.4

3

2.12

28.93

2.06

26.39

26.76

24.65

1.57

2

14.97

14.73 13.97

1

5 0

Flexural strenth ( N/mm2)

Compresive strength ( N/mm2)

0

MIX-1 SCC MIX-2 SCC MIX-3 SCC

MIX-1 SCC MIX-2 SCC MIX-3 SCC

7thday

14thday

28thday

Fig 3: (a) Compressive Test; (b) Split Tensile Test; (c) Flexural Test

8. Conclusion MIX-SCC 3 is the best-performing self compacting concrete (SCC) mix in all evaluated aspects. It demonstrates the highest compressive, flexural, and split tensile strengths, making it the most effective mix for construction applications. Additionally, it has the best chloride resistance, ensuring superior durability in chloride-exposed environments. These properties establish MIX-SCC 3 has the requiring enhanced workability, strength, and durability. The slump flow test results show that the 500 mm flow diameter is in accordance with IS standards, although bottom ash and copper slag increase with decreasing flow. The T500 time of 4.0 seconds is also in accordance with IS standards, which suggest a 3-5 second range. The J-ring test result shows a blocking height of 9.0 mm, which is significantly lower than the IS limit of 20 mm, and shows good flowability. The V-funnel test result of 9 seconds also verifies good viscosity, as IS suggests a maximum of 12 seconds for SCC. MIX-SCC 3 is stronger and more durable compared to other mixes. It has the highest compressive strength of 41.56 N/mm², the highest flexural strength of 3.61 N/mm², and thehighest split tensile strength of 2.4 N/mm² at 28 days. Its lowest chloride permeability of 902.9 mA also improves durability, and it can be applied in structures that are exposed to aggressive environments. MIX-SCC 3 outperforms other mixes with strength improvements of over 20% in compressive, 24% in flexural, and 28% in split tensile strength. It also shows up to 30% lower chloride permeability. Workability is enhanced with over 6% higher slump flow, 45% lower J-ring blocking height, and 24% faster V-funnel time. Acknowledgements The authors wish to thank Department of Science & Technology, Government of India for funding the Research Infrastructure under the Scheme entitled "Funds for the Improvement of S&T Infrastructure (DST-FIST)" Ref. No. SR/FST/ College - 110/2017. And AICTE Government of India under the scheme Modernisation and Removal of Obsolenscence (AICTE-MODROBS) Programme Sanction order (No:F.No.9.66/ RIFD/MODROBS/Policy-1/2017 18).