PSI - Issue 70

J. Arun Prasad et al. / Procedia Structural Integrity 70 (2025) 690–697

694

Fig. 2. Split Tensile Strength of Concrete Samples This chart compares the split tensile strength of conventional concrete with that of concrete containing 10% Cenosphere replacement over 7, 14, and 28 days. The split tensile strength of M20 concrete improved with the partial replacement of cement by 10% Cenospheres. The test results show the strength increases of approximately 8 – 13% at 7, 14, and 28 days compared to conventional concrete. This improvement is due to the enhanced microstructure and pozzolanic activity of Cenospheres, making them a viable additive for improving tensile performance in sustainable concrete mixes. 5.3. Flexural Strength Prisms of size 100 mm x 100 mm x 500 mm were cast using M20 grade of concrete and tested after 7 days, 14 days and 28 days for flexural strength of the concrete mix for the following combinations.

Table 5.3 Flexural Strength Comparisons Sample

Flexural Strength 7 days

14 days

28 days

Conventional Concrete 10 % replacement Cenosphere

1.74

2.53

3.36

1.96

2.78

3.62

Fig. 3. Flexural Strength Comparison