PEMANFAATAN LIMBAH PLASTIK POLYETHYLENE TEREPHTALATE SEBAGAI SUBSTITUSI PARSIAL PASIR PADA PEMBUATAN BATA INTERLOCK

HELEN LIBASTARI, . (2026) PEMANFAATAN LIMBAH PLASTIK POLYETHYLENE TEREPHTALATE SEBAGAI SUBSTITUSI PARSIAL PASIR PADA PEMBUATAN BATA INTERLOCK. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Pertumbuhan industri konstruksi meningkatkan kebutuhan pasir dan semen, sementara limbah plastik PET terus meningkat dan menimbulkan tekanan lingkungan karena sulit terurai. Penelitian ini menganalisis pengaruh substitusi parsial pasir dengan limbah PET terhadap karakteristik bata interlock, meliputi tampak, ukuran, pengujian lubang, berat jenis, kuat tekan, dan penyerapan air, sesuai SNI 03-0349-1989 tentang bata beton untuk pasangan dinding. Metode penelitian berupa eksperimen laboratorium dengan variasi PET 0%, 30%, 40%, dan 50% dari berat agregat halus, diuji pada umur 28 hari. Hasil uji tampak menunjukkan seluruh variasi lulus karena permukaan rata tanpa cacat signifikan, tidak mudah direpihkan, serta sudut bata tidak mudah runtuh. Uji dimensi menyatakan seluruh sampel memenuhi toleransi SNI (+3/−5 mm panjang dan ±2 mm lebar/tinggi) dari ukuran cetakan. Semua benda uji tergolong bata interlock pejal (volume lubang <25%). Kuat tekan bata utuh menurun dari 5,31 menjadi 2,36 MPa (−55%) dan bata setengah dari 10,45 menjadi 2,80 MPa (−73%), hanya kontrol memenuhi Mutu I (≥9,8 MPa). Penyerapan meningkat seiring kadar PET, bata utuh 3,80–6,65% dan bata setengah 4,66–9,83%, sementara berat jenis menurun 2.020,35 menjadi 1.442,13 kg/m³ (−29%). Secara keseluruhan, substitusi PET menghasilkan bata lebih ringan namun menurunkan kuat tekan, sehingga PET 30–50% lebih sesuai untuk elemen non-struktural seperti dinding non-beban dan partisi ringan. ***** The construction industry’s growth increases demand for sand and cement, while PET plastic waste continues to rise and creates environmental pressure because it is difficult to decompose. This study analyzes the effect of partially substituting sand with PET waste on the properties of interlocking bricks, including appearance, dimensions, void testing for brick classification, density, compressive strength, and water absorption, in accordance with SNI 03-0349-1989 for concrete bricks used in masonry walls. The research employed a laboratory experimental method with PET substitution levels of 0%, 30%, 40%, and 50% by weight of fine aggregate, tested at 28 days. Visual inspection results show that all variations passed, as the surfaces were relatively smooth with no significant defects, were not easily abraded, and the brick corners were not prone to crumbling. Dimensional testing indicates that all specimens met the SNI tolerances (+3/−5 mm for length and ±2 mm for width/height) relative to the mold dimensions. All specimens were classified as solid interlock bricks (void volume <25%). The compressive strength of full bricks decreased from 5.31 to 2.36 MPa (−55%), and half bricks decreased from 10.45 to 2.80 MPa (−73%); only the control met Grade I (≥9.8 MPa). Water absorption increased with higher PET content, from 3.80–6.65% for full bricks and 4.66–9.83% for half bricks, while density decreased from 2,020.35 to 1,442.13 kg/m³ (−29%). Overall, PET substitution produces lighter bricks but reduces compressive strength; therefore, PET levels of 30–50% are more suitable for non-structural elements such as non-load-bearing walls and lightweight partitions.

Item Type:	Thesis (Sarjana)
Additional Information:	1). Anisah, M.T. ; 2). Dr. Muhammad Agphin Ramadhan, M.Pd.
Subjects:	Teknologi dan Ilmu Terapan > Teknik Sipil
Divisions:	FT > S1 Pendidikan Teknik Bangunan
Depositing User:	HELEN LIBASTARI .
Date Deposited:	09 Feb 2026 04:48
Last Modified:	09 Feb 2026 04:48
URI:	http://repository.unj.ac.id/id/eprint/65107

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