EFEKTIVITAS PENGUJIAN KUAT TEKAN BETON PADA SPUN PILE DENGAN METODE CORE DRILL, HAMMER TEST, DAN COMPRESSIVE STRENGTH TEST DI PT JAYA BETON INDONESIA

EFFECTIVENESS OF CONCRETE COMPRESSIVE STRENGTH TESTING ON SPUN PILE USING CORE DRILL, HAMMER TEST, AND COMPRESSIVE STRENGTH TEST METHODS AT PT JAYA BETON INDONESIA

Pengujian struktur beton setelah beton mengeras adalah untuk menentukan struktur beton tersebut cocok untuk digunakan sesuai dengan mutu yang direncanakan. Pengujian mutu beton dilakukan tanpa merusak beton. Penelitian ini bertujuan untuk mengetahui cara mengidentifikasi mutu pada spun pile, mengetahui perbedaan metode dan hasil antara uji pengeboran inti, uji kuat tekan, dan uji palu beton, dan mengetahui metode mana yang lebih efektif untuk megidentifikasi mutu kuat tekan pada spun pile. Metode yang digunakan untuk menentukan kapasitas dan kekuatan struktural tiang spun pile menggunakan 3 metode pengujian yaitu metode Core Drill Test, Schmidt Hammer Test, dan Compressive Strength Test digunakan sebgai alternatif dalam menentukan nilai kuat tekan spun pile. Hasil pengujian kuat tekan beton pada spun pile menggunakan metode Core Drill Test, Schmidt Hammer Test, dan Compressive Strength Test telah memenuhi syarat. Hasil pengujian kuat tekan menggunakan metode core drill test memperoleh  hasil rata-rata sebesar 50,98 Mpa untuk spun pile fc 45 dan 55,83 Mpa untuk spun pile fc 50. Dari hasil pengujian Schmidt hammer test mengindikasikan bahwa nilai koefisien variasi (KV) dari keseluruhan sampel spun pile yang diuji berkisar antara 3,19%-4,72%. Compressive Strength Test memperoleh hasil rata-rata kuat tekan spun pile fc 45 sebesar 57,22 Mpa sampel beton umur 28 hari. Sedangkan untuk spun pile fc 50 memperoleh hasil rata-rata 64,35 Mpa sampel beton umur 28 hari.  Berdasarkan analisis data, efektivitas pengujian kuat tekan beton dapat disimpulkan bahwa Core Drill Test sangat efektif dilakukan dalam pengujian kuat tekan beton.

Testing the concrete structure after the concrete has hardened is to determine whether the concrete structure is suitable for use according to the planned quality. Concrete quality testing is carried out without damaging the concrete. This study aims to find out how to identify the quality of spun pile, to know the differences in methods and results between the core drilling test, compressive strength test, and concrete hammer test, and to find out which method is more effective for identifying the compressive strength quality of spun pile. The method used to determine the capacity and structural strength of spun pile using 3 test methods, namely the Core Drill Test, Schmidt Hammer Test, and Compressive Strength Test methods are used as an alternative in determining the compressive strength value of spun pile. The results of the concrete compressive strength test on spun pile using the Core Drill Test, Schmidt Hammer Test, and Compressive Strength Test methods have fulfilled the requirements. The results of the compressive strength test using the core drill test method obtained an average yield of 50.98 Mpa for spun pile fc 45 and 55.83 Mpa for spun pile fc 50. From the results of the Schmidt hammer test it indicates that the coefficient of variation (KV) of the overall spun pile samples tested ranged from 3.19% -4.72%. The Compressive Strength Test obtained an average compressive strength of spun pile fc 45 of 57.22 MPa for a 28 day old concrete sample. As for the spun pile fc 50, it obtained an average yield of 64.35 MPa for a concrete sample aged 28 days. Based on data analysis, the effectiveness of testing the compressive strength of concrete can be concluded that the Core Drill Test is very effective in testing the compressive strength of concrete.