PSI - Issue 60

8

Swathy S et.al / Structural Integrity Procedia 00 (2019) 000 – 000

Swathy S et al. / Procedia Structural Integrity 60 (2024) 591–603

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Fig 9 Test set up

3. Results and discussion 3.1 Compressive strength of concrete

Compressive strength of concrete cubes is done in order to assess the load bearing capacity offered by one particular batch of concrete mix. Load bearing capacity is a crucial mechanical property that needs to be assessed to ensure that the concrete specimen will achieve the suitable strength as per the mixed design. This is achieved by casting two sets of 150mm x 150mm cubes (Six cubes in total), and testing cubes (done using a Universal Testing Machine – UTM) upon 28 days curing period. Polypropylene fiber (0.3%) reinforced concrete of three specimen is tested after curing the specimen for 28 days and tested using UTM (Universal testing machine). Table 2 shows the test details of cube tested to find compressive strength. Fig 10 the compressive strength of concrete cube with the addition of fiber is around 7.18% more than the compressive strength of concrete cube without addition of fiber. The addition of fiber has reduced the retraction cracks when compared to the cube without fiber.

Table 2 Test result of cube Cube

Age (Days)

Dimension (mm)

Fiber type

Optimum %

Compressive Strength (MPa)

Cube 1

28

150 x 150 x150

None

None

38.29

Cube 2

28

150 x 150 x150

Polypropylene fiber

0.3%

41.04