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All Journal Peronema Forestry Science Journal PATRIOTIK: Jurnal Inovasi dan Pemberdayaan Masyarakat
Luthfi Hakim
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Education Industrial & Manufacturing Engineering Social Sciences Other

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ANALISIS KERUGIAN EKONOMIS DAN PEMETAAN SEBARAN SERANGAN RAYAP PADA BANGUNAN SMA DAN SMK KOTA PEKANBARU Frieda Sitepu; Luthfi Hakim; Yunus Afifuddin
Peronema Forestry Science Journal Vol 4, No 3 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Building planning always take into two important aspects related that is the strength and durability. Related to the strength , the structure of the building is planned based on the load to occur and the power structure of the materials used. The tendency of the danger of attacked by termites in buildings including residential function at this point is getting higher. This study intend to get the value of economic losses termite attack, and get the information types and the spread of termites that attack the buildings of Senior High School and Vocational High School in Pekanbaru. The research was conducted on July until August 2014. The method was used is direct observation and interviews. The results mapped with GIS applications. The results showed that 64% of senior school building have small damage and 36% of schools included in the moderate damage. Termite species found are a type of dry wood termites (Cryptotermes cynocephalus) and Termite soil (Microtermes inspiratus) Keywords: Termites, economic losses, school buildings, GIS
KUALITAS PAPAN SEMEN DARI SERUTAN LIMBAH INDUSTRI PENSIL DENGAN BERBAGAI KOMPOSISI BAHAN BAKU DAN KONSENTRASI CaCl2 Fatmala Salmah; Luthfi Hakim; Tito Sucipto
Peronema Forestry Science Journal Vol 4, No 3 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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This research concerning on the use of pencil shavings waste as a raw material in the manufacture of cement board. The purpose of this research was to evaluate the quality of the cement board to the physical properties and mechanical properties of the board with different ratio of raw materials:cement and various concentrations of CaCl2 as a catalyst. The board was made of pencil shavings with various ratio of raw materials (cement : shave ) were : 75:25; 80:20; 85:15 and a catalyst concentration were 3 % and 5 % with a target density of 1,2 kg/cm3. Testing of physical and mechanical properties based on the standard JIS A 5417-1992 of cement particle board . The results of this research indicate that the physical properties of the cement board pencil shavings particle has met the standard of JIS A 5417-1992 . As for testing the mechanical properties do not meet the standards of JIS A 5417-1992 . The best treatment is 85:15 raw material composition at a concentration of 3 % catalyst. Comparison of the composition of raw materials and catalyst concentration does not significantly affect the physical and mechanical properties of the cement board particles pencil shavings . Keywords : cement board , catalysts , particle , pencil shavings , CaCl2
PENGARUH RASIO SEMEN DAN PARTIKEL TERHADAP KUALITAS PAPAN SEMEN DARI LIMBAH PARTIKEL INDUSTRI PENSIL Rizqi Putri Winanti; Luthfi Hakim; Tito Sucipto
Peronema Forestry Science Journal Vol 4, No 3 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Utilization of pencil shavings waste as raw material cement board is one of the alternatives to reduce timber production. The research objective was to evaluate the physical and mechanical properties of the cement board with a pencil shavings waste catalyst addition of calcium chloride on the variation ratio of materials (cement: particle: water). Cement board in this study is made of pencil shavings waste particles with various compositions of raw materials (cement: particle) 75:25; 80:20; 85:15; 90:10 with the addition of a catalyst and Calcium Chloride (CaCl2) as much as 5%. With a target density of 1.2 kg / cm2. Testing of physical and mechanical properties based on JIS 5417-1992 about cement particle board. Value of  physical and mechanical properties testing of cement particle board not all fulfill with the standards of JIS A 5417-1992. The physical properties of cement particle board that fulfill with JIS A 5417-1992 standard is the density with ratio 75:25, the water content and 2 hours and 24 hours of thickness swelling . the mechanical properties of the cement particle board not fulfill with standard of JIS  A 5417-1992. The best treatment is the cement board with a ratio of 90:10. The ratio of cement composition and particle pencil shavings waste no significant effect on the quality of the cement particle board produced. Keywords: cement board, CaCl2 catalyst, pencil shavings, physical and mechanical properties.
Sifat Fisis dan Mekanis Papan Semen dari Limbah Industri Pensil dengan Berbagai Rasio Bahan Baku dan Target Kerapatan Yunida Syafriani L; Luthfi Hakim; Tito Sucipto
Peronema Forestry Science Journal Vol 4, No 3 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

Pemanfaatan limbah industri serutan pensil belum banyak dikembangkan. Tujuan utama dari penelitian ini adalah untuk mengevaluasi kelayakan teknis limbah industri serutan pensil sebagai bahan baku papan semen. Penelitian ini dilakukan untuk: menentukan rasio semen-partikel dan target kerapatan terbaik terhadap sifat fisis dan mekanis papan semen yang dihasilkan; mengevaluasi pengaruh rasio bahan baku dan target kerapatan terhadap kualitas papan semen. Rasio bahan baku yang digunakan adalah 80:20, dan 85:15. Target kerapatan yang ditetapkan adalah 1 g/cm3 dan 1,2 g/cm3. Katalis yang digunakan sebagai akselerator adalah magnesium klorida (MgCl2). Papan ditekan dengan kempa dingin pada 25 kg/cm2 selama 10 menit. Metode penelitian ini menggunakan dua tahap proses pengerasan papan semen. Tahap pertama proses pengerasan papan kering udara selama 4-5 hari dan dilanjutkan dengan pengovenan papan semen selama 24 jam pada suhu 50oC. Hasil penelitian menunjukkan bahwa nilai sifat fisis yang dihasilkan memenuhi standar JIS A 5417-1992. Efek rasio semen-partikel pada kekuatan menunjukkan bahwa rasio 85:15 sangat baik dibandingkan dengan rasio 80:20. Target kerapatan terbaik adalah 1,2 g/cm3. Kata kunci : serutan pensil, papan semen, rasio semen-partikel, target kerapatan.
Penguatan Literasi Ekologi Sosial Pesisir dan Valuasi Karbon Mangrove dalam Mendukung Eco Forest City di Medan Belawan Suranto Suranto; Rahmawaty Rahmawaty; Isnen Fitri; Luthfi Hakim; Ismayadi Ismayadi; Darnianti Darnianti; Eling Tuhono; Suarno Suarno
PATRIOTIKA: Jurnal Inovasi dan Pemberdayaan Masyarakat Vol 2 No 1 (2026): May 2026
Publisher : Universitas Nahdlatul Ulama Sumatera Utara

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Abstract

Medan Belawan District is a strategic coastal area in Medan City that has important ecological, social, and economic functions. The presence of mangroves and urban trees in this area acts as green infrastructure that supports coastal protection, carbon storage, biota habitat, and urban environmental resilience. This community service activity aims to strengthen coastal social ecological literacy, increase participants' understanding of the carbon valuation of mangroves and urban trees, and encourage collective awareness in supporting the development of Eco Forest City in Medan Belawan. The activities were carried out through excursion studies, field observations, academic discussions, ecological data interpretation, and dissemination of results through online mass media. The community service material was supported by data on vegetation inventory, mangrove cover, tree health, carbon storage, carbon economic value, and priority management zoning. The results of the activity showed that mangroves are a dominant component of Medan Belawan's public green spaces, namely 157 of 218 inventory units or 72.02%. The dominant species is Avicennia marina with 105 individuals or 48.17%. Mangrove cover increased from 393.28 ha in 2005 to 1,110.00 ha in 2025. Carbon storage is estimated to reach 35,106 kg C or 128,840 kg CO2e, with a carbon economic value of Rp471,091,349. The outputs of the activity include increased participant literacy, recommendations for coastal green space management, activity documentation, community service articles, and news releases in Borneonews. This activity demonstrates that community service based on scientific data can be a bridge between research, field learning, communities, and coastal management policies.
Co-Authors Darnianti Darnianti Eling Tuhono Fatmala Salmah Frieda Sitepu Ismayadi Ismayadi Isnen Fitri Rahmawaty, Rahmawaty Rizqi Putri Winanti Suarno Suarno Sucipto, Tito Suranto Suranto Yunida Syafriani L Yunus Afifuddin