Evaluasi Kuat Tekan dan Mutu Ekuivalen SNI EcoPlast Paving Block LDPE-Pasir tanpa Semen pada Berbagai Komposisi Campuran

Arina Zakyatul Putri, Ataya Syahira, Fahmi Waladul Hafidz Al Huda, Vicky Wildan Yustisia

Abstract


Paving block konvensional bergantung pada semen Portland yang berkontribusi besar terhadap emisi karbon industri, sementara limbah plastik jenis Low-Density Polyethylene (LDPE) terus menumpuk karena laju daur ulangnya yang rendah. Penelitian ini mengkaji hubungan kuantitatif antara proporsi campuran limbah LDPE dan pasir terhadap nilai kuat tekan paving block non-semen, serta menentukan ambang komposisi yang memenuhi mutu ekuivalen SNI 03-0691-1996. Tiga variasi rasio massa LDPE terhadap pasir – 70:30, 50:50, dan 60:40 – diuji dengan tiga benda uji berukuran 20×10×6 cm per rasio (n=9), diproses melalui pelelehan termal pada suhu 110-130˚C dan dikompaksi manual. Hasil uji kuat tekan pada umur 28 hari menunjukkan nilai rata-rata 13,40 MPa (70:30), 20,54 MPa (50:50), dan 42,69 MPa (60:40) dengan pola peningkatan kekuatan yang tidak linear terhadap penambahan pasir, melainkan mengikuti kecenderungan eksponensial pada rentang kandungan pasir di atas 50%. Analisis efisiensi menunjukkan bahwa rasio 60:40 mencapai mutu ekuivalen kelas A SNI dengan konsumsi plastik per satuan kekuatan yang lebih rendah dibandingkan rasio lainnya, menandakan titik optimum antara efisiensi material dan kinerja struktural. Daya serap air seluruh benda uji berada di bawah 3%, mengonfirmasi sifat kedap air LDPE. Penelitian ini menyimpulkan bahwa proporsi pasir, bukan sekadar keberadaan plastik, merupakan variabel penentu utama kinerja mekanis paving block berbasis LDPE.


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DOI: https://doi.org/10.18860/j-ice.v1i1.45541

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Universitas Islam Negeri Maulana Malik Ibrahim Malang

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