Judul: Conversion of Plastic Waste from IPB Darmaga Kampus into Paving Blocks and Plant Pots
Abstrak: Upaya yang dapat dilakukan untuk mengurangi dampak buruk limbah plastik adalah daur ulang (recycle) plastik menjadi produk baru. Penelitian ini bertujuan melakukan identifikasi dan karakterisasi limbah anorganik di Kampus IPB Darmaga, merancang bangun dan melakukan uji unjuk kerja alat peleleh limbah plastik, dan mengolah limbah plastik menjadi paving block dan pot tanaman. Identifikasi dan karakterisasi dilakukan terhadap sampah anorganik di Kampus IPB Darmaga dengan fraksi terbesar adalah sampah plastik campur mencapai 36,13%. Berat jenis sampah plastik campur adalah 0,0112 kg/L. Alat peleleh plastik dirancang dengan kapasitas 12 kg. Alat peleleh plastik terdiri atas kerangka meja dan ruang pelelehan berbentuk tabung tertutup. Alat tersebut terbuat dari material besi, dilengkapi dengan termometer dan pipa keluaran. Uji unjuk kerja memperlihatkan bahwa alat sudah berfungsi dengan baik. Titik leleh plastik tercapai pada suhu 180 0C. Plastik yang sudah meleleh dapat dibuat menjadi pot tanaman maupun digunakan sebagai bahan tambahan paving block., The solution that can be done to reduce the bad impact of plastic waste is to recycle plastic into new products. This study aimed to identify and characterize inorganic waste at the IPB Darmaga Campus, to design and test the performance of a plastic waste melting device, and to process plastic waste into paving blocks and plant pots. Identification and characterization were carried out on inorganic waste at the IPB Darmaga Campus and it was found that the largest fraction was mixed plastic waste, reaching 36,13%. The density of mixed plastic waste measured was 0,0112 kg/L. The plastic melter is designed with a capacity of 12 kg. The plastic melter consists of a table frame and a closed tubular melting chamber. The tool is made of iron material, equipped with a thermometer and output pipe. The performance test showed that the tool is functioning properly. The melting point of plastic is reached at 180 0C. Melted plastic can used to make plant pots or used as additional material for paving blocks.
Keyword: paving block komposit, peleleh plastik, rancang bangun, unjuk kerja

Judul: Utilization of Low-Density  Polyethylene (LDPE) Plastic Waste into Guiding Blocks Using the Melting Method
Abstrak: Penduduk perkotaan Pulau Jawa menghasilkan 189.349 ton sampah plastik tiap bulannya, 88,17% sampah plastik tersebut diangkut langsung ke tempat pembuangan sampah. Pemanfaatan limbah plastik dapat ditemukan dalam bidang konstruksi sebagai campuran agregat batu bata dan material subtitusi aspal. Penelitian ini bertujuan mengolah dan menguji mutu limbah plastik menjadi guiding block. Material yang digunakan berupa limbah plastik jenis LDPE. Metode yang digunakan pelelehan dan pencetakan. Mutu guiding block diuji berdasarkan parameter densitas dan kuat tekan. Kuat tekan diuji mengacu pada ASTM D695-15 sesuai parameter SNI 8160:2015. Limbah plastik jenis LDPE dipilih karena mudah ditemukan, mudah didaur ulang, fleksibel, dan resisten terhadap reaksi kimia. Densitas guiding block plastik dilakukan prngukuran pada tiga sampel uji dengan rataan 1,47 g/cm3. Rataan kuat tekan yang diperoleh sebesar 17,5 MPa memenuhi syarat minimum SNI 8160:2015 sebesar 17 MPa. Skoring yang dilakukan pengguna (tuna netra) terhadap guiding block plastik sebesar 7,7 dari maksimal 10., The urban population of Java Island produces 189,349 tons of plastic waste every month, 88.17% of plastic waste is transported directly to landfills. The use of plastic waste can be found in the construction sector as a mixture of brick aggregate and asphalt substitute materials. This research aims to process plastic waste into guiding blocks and test the quality of the conversion results. The material used is LDPE type plastic waste. Method used is melting and molding. The quality of the guiding block is tested based on density and compressive strength parameters. Compressive strength was tested referring to ASTM D695-15 according to the parameters of SNI 8160:2015. LDPE plastic waste was chosen because it is easy to find, easy to recycle, has good flexible, and resistant to chemical reactions. Plastic guiding block density testing was carried out on three test samples with an average of 1.47 g/cm3. The average compressive strength obtained was 17.5 MPa meets the minimum requirements in SNI 8160:2015 of 17 MPa. The scoring by users (blind) of the final sample plastic guiding blocks was 7.7 out of a maximum of 10.
Keyword: compressive strength, density, guiding blocks, Low Density  Polyethylene (LDPE), plastic waste

Judul: Asymptotic Distribution of Estimator for the Intensity Function of a Doubly Periodic Poisson Process
Abstrak: In this manuscript, estimation of the intensity function of a doubly periodic Poisson process is discussed. It is assumed that only a single realization of the Poisson process is observed in a bounded window [0,n]. It is also assumed that the period of the intensity function is known. The rate of consistency and asymptotic normality of the estimator are formulated. Finally, a confidence interval for the local intensity function is also formulated.
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