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Luthfi Hakim
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry

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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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (994.697 KB)

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1028.281 KB)

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (661.315 KB)

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.
Co-Authors Fatmala Salmah Frieda Sitepu Rizqi Putri Winanti Sucipto, Tito Yunida Syafriani L Yunus Afifuddin