Electronic Theses and Dissertation

ndustri berupa ampas tebu menjadi tantangan lingkungan yang memerlukan upaya
pemanfaatan secara berkelanjutan. Penelitian ini bertujuan menganalisis pengaruh variasi
penambahan ampas tebu terhadap karakteristik fisik dan mekanik paving block ramah
lingkungan berbasis limbah plastik LDPE serta menentukan proporsi optimum yang
memenuhi persyaratan SNI 03-0691-1996. Penelitian menggunakan Rancangan Acak
Lengkap (RAL) nonfaktorial dengan satu faktor perlakuan, yaitu variasi proporsi ampas tebu
sebesar 0%, 5%, 10%, 15%, 20%, 25%, dan 30%, dengan tiga kali ulangan sehingga
diperoleh 21 satuan percobaan. Paving block dibuat melalui proses pelelehan LDPE,
pencampuran dengan ampas tebu berukuran 60 mesh, pencetakan, pengepresan, dan
pendinginan. Parameter yang diamati meliputi kuat tekan, daya serap air, porositas, dan
densitas. Data dianalisis menggunakan uji One-Way ANOVA yang dilanjutkan dengan uji
Duncan Multiple Range Test (DMRT). Hasil penelitian menunjukkan bahwa variasi proporsi
ampas tebu terhadap LDPE berpengaruh nyata (p≤0,05) terhadap kuat tekan, daya serap air,
dan porositas, tetapi tidak berpengaruh nyata terhadap densitas (p>0,05). Nilai kuat tekan
tertinggi diperoleh pada penambahan ampas tebu 10% sebesar 18,50 MPa, sedangkan rata
rata seluruh perlakuan sebesar 15,94 MPa yang memenuhi persyaratan Mutu C SNI sehingga
sesuai untuk area berbeban ringan. Seluruh variasi memiliki daya serap air sebesar 0,20
1,08% yang memenuhi persyaratan Mutu A. Nilai porositas terendah diperoleh pada variasi
5% dan 10%, menunjukkan struktur material yang lebih rapat. Penambahan ampas tebu di
atas 10% menyebabkan penurunan kuat tekan serta peningkatan daya serap air dan porositas
akibat terbentuknya rongga (void) dan berkurangnya kemampuan matriks LDPE dalam
melapisi filler. Hasil penelitian menunjukkan bahwa proporsi ampas tebu 10% memberikan
karakteristik paving block ramah lingkungan terbaik di antara seluruh variasi yang diuji.

The problem of Low-Density Polyethylene (LDPE) plastic waste and agro-industrial waste in the form of sugarcane bagasse has become an environmental challenge that requires sustainable utilization efforts. This study aimed to analyze the effect of varying proportions of sugarcane bagasse on the physical and mechanical characteristics of environmentally friendly paving blocks based on LDPE plastic waste and to determine the optimum bagasse proportion that meets the requirements of SNI 03-0691-1996. The study employed a non-factorial Completely Randomized Design (CRD) with a single treatment factor, namely sugarcane bagasse proportions of 0%, 5%, 10%, 15%, 20%, 25%, and 30%, each with three replications, resulting in a total of 21 experimental units. The paving blocks were produced through LDPE melting, mixing with 60-mesh sugarcane bagasse, molding, pressing, and cooling processes. The observed parameters included compressive strength, water absorption, porosity, and density. The data were analyzed using a One-Way Analysis of Variance (ANOVA), followed by Duncan's Multiple Range Test (DMRT). The results showed that the proportion of sugarcane bagasse significantly affected (p ≤ 0.05) compressive strength, water absorption, and porosity, but had no significant effect on density (p > 0.05). The highest compressive strength was obtained with the addition of 10% sugarcane bagasse, reaching 18.50 MPa, while the overall mean compressive strength of all treatments was 15.94 MPa, meeting the requirements for Grade C according to SNI 03-0691-1996 and therefore suitable for light-load applications. All treatment variations exhibited water absorption values ranging from 0.20% to 1.08%, satisfying the requirements for Grade A. The lowest porosity values were observed in the 5% and 10% bagasse proportions, indicating a denser material structure. The addition of sugarcane bagasse above 10% resulted in decreased compressive strength and increased water absorption and porosity due to the formation of voids and the reduced ability of the LDPE matrix to adequately coat the filler. The findings indicate that the 10% sugarcane bagasse proportion produced the best overall characteristics of environmentally friendly paving blocks among all treatment variations.