| dc.description.abstract | The use of fly ash waste from power plants can be utilized as a substitute
material in concrete production for construction purposes such as
buildings. A building requires structural evaluation to identify potential
damages or weaknesses. There are two commonly used methods for
structural evaluation: destructive and non-destructive testing. In some
conditions, carrying out destructive tests in the field is not feasible,
hence non-destructive testing is employed. Common non-destructive
tests include the hammer test and UPV test, yet the results obtained from
these tests have not fully depicted the overall strength of the structure.
Therefore, it is necessary to establish correlations with several other
compressive strength tests. The purpose of this study is to determine the
correlation between the results of concrete compressive strength tests
conducted in the laboratory using a compression test apparatus,
hammer test, and UPV test. The tests were carried out on cylindrical
test specimens with a diameter of 15 cm and a height of 30 cm, with
variations in concrete quality including 14,5 MPa, 21 MPa, 25 MPa,
and 30 MPa, with a 10% substitution of fly ash for cement. The
correlations/relationships among the three tests obtained in this study
are as follows: UPV test with compression test is represented by Y =
145.88ln(x) - 1201.9 (R² = 0.4691), hammer test with compression test
is represented by Y = 1.8592x - 24.34 (R² = 0.5802), and the
combination of hammer test and UPV test with compression test is
represented by Y = -62.102 + 0.011x1 + 1.420x2 (R² = 0.602). | en_US |
