Issue 75

M. Ramos et alii, Fracture and structural integrity, 75 (2026) 399-434 ; DOI: 10.3221/IGF-ESIS.75.29

Using the developed mix design, a total of 8 specimens were prepared to evaluate the compressive strength of the hardened concrete. These specimens were cured at 7 and 28 days, submerged in water tanks. Under identical environmental conditions for each specimen evaluated , as part of the tests necessary for quality control of the construction materials used. The following table shows the results obtained from the tests carried out in the Concrete Laboratory of the Peruvian Union University:

Gross area (cm 2 ) 179.08 174.37 174.37 180.27 179.08 179.08 180.27 180.27

Dimensions (cm)

Test date

Age (days)

Applied load ( kgf )

Compressive strength (kg/cm 2 )

Witness

Emptying date

Diameter

High 30.17 29.71 29.78 30.44 29.85 30.25 29.78 30.00

T-01 T-02 T-03 T-04 T-05 T-06 T-07 T-08

15.10 14.90 14.90 15.15 15.10 15.10 15.15 15.15

10.02 10.02 20.01 20.01 20.01 20.01 20.01 20.01

17.02 17.02 17.02 17.02 17.02 17.02 17.02 17.02

7 7

34360.00 35502.30 45921.40 45536.50 42369.10 41735.30 42434.50 43588.40

191.87 203.61 263.36 252.61 236.59 233.06 235.40 241.80

28.00 28.00 28.00 28.00 28.00 28.00

Table 6: Results of compression strength tests according to ASTM C39 standard.

Based on the concrete mix design, this was established as the Control Concrete (CP), which served as the basis of the research, to which synthetic polypropylene fiber was incorporated to obtain the following dosages:  Control sample (MP) (0 g/m 3 )

 Sample design 01 (DM-01) (500 gr/m 3 )  Sample design 02 (DM-02) (1000 gr/m 3 )  Sample design 03 (DM-03) (2000 gr/m 3 ) Dosage (g/m 3 ) Sample

Volume (m 3 )

Necessary raffia (g)

M-01 M-02 M-03 M-04 M-05 M-06 M-07 M-08 M-09 M-10 M-11 M-12 M-13 M-14 M-15 M-16 M-17 M-18 M-19 M-20

0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274 0.0274

0.00 0.00 0.00 0.00 0.00

0

13.68 13.68 13.68 13.68 13.68 27.36 27.36 27.36 27.36 27.36 54.71 54.71 54.71 54.71

500

1000

2000

54.71 Table 6: Incorporated weight of polypropylene synthetic fiber in the control concrete.

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