PERSENTASE KENAIKAN NILAI CBR TANAH LANAU HALIM YANG DIPERKUAR DENGAN LIMBAH C&D PADA BERBAGAI PROPORSI

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Bagus Yusuf Mahendra
Alfred Jonathan Susilo
Gregorius Sandjaja

Abstract

Silt soil generally has characteristics of grayish-black color and high water content. This type of soil has a low bearing capacity, requiring improvement to enhance its stability and strength. This study evaluates the effectiveness of using Construction and Demolition Waste (C&D Waste) as an additive to improve the mechanical properties of silt soil. Three types of C&D Waste were tested: red bricks, lightweight bricks (hebel), and mortar, each with mixture variations of 5%, 10%, and 15%. The California Bearing Ratio (CBR) test was used to assess the soil's bearing capacity after mixing. Test results showed that the 15% hebel mixture produced the highest CBR value of 39.67%, followed by mortar and red bricks. However, increasing the percentage of additives does not always correlate linearly with higher CBR values, as observed in the decreased CBR value for the 15% red brick mixture. This study demonstrates that using C&D Waste, especially hebel, is effective in improving the bearing capacity of silt soil. Additionally, this research contributes to more sustainable construction waste management.


Abstrak


Tanah lanau umumnya memiliki kapasitas daya dukung tanah yang rendah, sehingga membutuhkan perbaikan untuk meningkatkan kestabilan dan kekuatannya. Penelitian ini mengevaluasi efektivitas penggunaan limbah konstruksi dan pembongkaran (Construction and Demolition Waste, C&D Waste) sebagai bahan tambah untuk memperbaiki sifat mekanis tanah lanau. Tiga jenis C&D Waste yang diuji adalah bata merah, hebel, dan mortar, masing-masing dengan variasi campuran 5%, 10%, dan 15%. Uji California Bearing Ratio (CBR) digunakan untuk menilai daya dukung tanah setelah pencampuran. Hasil pengujian menunjukkan bahwa campuran bata merah 5% menghasilkan nilai CBR tertinggi sebesar 47,48%, diikuti oleh mortar dan hebel. Namun, peningkatan persentase bahan tambah tidak selalu berbanding lurus dengan peningkatan nilai CBR, sebagaimana terlihat pada penurunan nilai CBR campuran hebel 5%. Penelitian ini menunjukkan bahwa penggunaan C&D Waste, terutama hebel, efektif dalam meningkatkan daya dukung tanah lanau. Studi ini juga memberikan kontribusi terhadap pengelolaan limbah konstruksi yang lebih berkelanjutan.

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References

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