Pemanfaatan Cangkang Kijing atau disebut Pilsbryoconcha Exilis sebagai substitusi agregrat halus pada campuran lapisan aspal beton (AC-WC) merupakan suatu langkah yang tepat dan strategis untuk mengatasi kekurangan agregat halus yang memenuhi syarat dalam campuran aspal serta mengurangi limbah.Limbah cangkang kijing didapatkan di sungai Kuala Tuha, kecamatan Kuala Pesisir, Kabupaten Nagan Raya.Penggunaan limbah cangkang kijing ini dimaksudkan untuk memperoleh suatu campuran yang memiliki kestabilan dan kekuatan yang baik sehingga bahan tersebut dapat dijadikan sebagai bahan alternatif substitusi agregat halus. Tujuan penelitian ini untuk mengetahui pengaruh cangkang kijing sebagai substitusi agregat halus terhadap campuran lapisan aspal beton AC-WC dengan variasi 100%, 75%, dan 50% terhadap berat agregat. Adapun metode yang digunakan mengacu pada Spesifikasi Bina Marga 2018 Divisi 6, dengan menentukan Kadar Aspal Optimum (KAO) yang diperoleh dari metode marshall mensyaratkan tujuh parameter yaitu Density, VIM, VMA, VFA, Stabilitas, Flow dan Marshall Quotient, Kemudian setelah didapatkan nilai KAO, maka dilanjutkan pembuatan benda uji terhadap variasi substitusi cangkang kijing dengan agregat halus yang memenuhi yaitu 100%CK:0%AH, 75%CK:25%AH, dan 50%CK:50%AH terhadap berat total agregat halus. Berdasarkan hasil penelitian diperoleh KAO sebesar 5,00%. Pada campuran aspal untuk persentase cangkang kijing substitusi agregat halus yang memenuhi syarat parameter marshall adalah 75%CK: 25%AH, dimana density (2,54 gr), VIM (3,08%), VMA (14,72%), VFA (79,41%), Stabilitas (1299,89 kg), Flow (3,33 mm), dan MQ (391,67 kg/mm). Dapat disimpulkan bahwa pemanfaatan cangkang kijing sebesar 75% terhadap berat agregat mampu menghasilkan stabilitas (min 800 kg), ini membuktikan bahwa meningkatkan adhesi dan kohesi antara agregat dan aspal serta ada kerapatan camputan antara bidang kontak antar agregat
One of the waste materials produced by industry activities is fly ash and bottom ash (FABA), it is produced by brick combustion waste. Fly ash and bottom ash waste is hazardous and toxic (B3) waste for it contains heavy metal oxides polluting the environment. Related to the condition, the output study of toxicity potential test carried out to coal ash in Nagan Raya PLTU (Electric Steam Power Plant) proving conversely. The coal ash of Nagan Raya PLTU is relatively safe to be used as construction material. The output explained that coal ash of Nagan Raya PLTU have adequate good potency to be utilized. One of coal ash potencies developed is the utilization asphalt mixture material including bottom ash as fine aggregate substitution and fly ash as filler substitution. The research aimed to find out the mixture characteristic by utilizing FABA for the road pavement of asphalt concrete layer (AC-WC) to reduce environment pollution and detect the appropriate proportion for the optimal utilization. The percentage of fine aggregate in the mixture must meet the requirement of binder as 5-15% to the weight, while the filler must meet the minimum of 75% to weight of filter pass No. 200 (0.075 mm). The test output of both mixtures by using bottom ash and fly ashin 15%-30% variation was different. The output is similar. Both of the output concluded that the optimum asphalt level was 5% and the variation of 30% bottom ash : 70% fine aggregate meet the requirement specification, while variation fly ash as subtitution Portland cement resulting that all the parameters meet the specification required by Bina Marga specification 2018.
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