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Jurnal Penelitian Hasil Hutan
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Search results for , issue " Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan" : 9 Documents clear
Lapisan Perkerasan Komposit Batu Pecah pada Kontruksi Jalan Hutan Rahardjo, Rahardjo; Suparto, S; Sutopo, S
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4724.164 KB) | DOI: 10.20886/jphh.1987.4.2.50-55

Abstract

The use of pavement in Indonesian forest road construction at present is not common practice. Paving of logging roads is still considered too expensive, especially when its construction is not rational and effective. Information on pavement design especially with regard to its composition should help forest companies in solving their forest road construction problems.This investigation looks into the problem of finding the proper composition of crushed gravel and sand or rock dust for the construction of pavements. This kind of pavement is thought to have high shearing strength, stability and density.A series of laboratory test were conducted for this purpose, employing factorial analysis .A performance test in the field was conducted to compare with the Telford system using paired samples.The investigations revealed the following:- Crushed rock had significant influence on the shearing strength of the pavement. This material mixed with rock dust showed significant interaction.- Rock dust itself and water did not have significant effect on the shearing strength of pavement.- The use of water may help  facilitate the compaction process guiding the filler material into the voids among the crushed rock particles.- The proper composition turned out to be three units of crushed rock and two units of rock dust, resulting in a shearing strength of 0,226 kg/cm2.- Crushed rock composite made better pavement than the Telford system, resulting in lower settling of subgrade.- Based on the above, it is recommended to use a mixture of 2-3size crushed rock and rock dust in the proportion of 3 : 2 for pavement of forest roads, using smooth drum roller to obtain proper compaction.
KOMUNITAS RAYAP TANAH DI SEPULUH LOKASI DI DKI JAKARTA Sumarni, Ginuk; lsmanto, Agus
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4536.691 KB) | DOI: 10.20886/jphh.1987.4.2.21-26

Abstract

Subterranean  termites  are important  insects which attack structural   timber.  Six species have been found at ten locations of the Jakarta Metropolitan: Microtermes insperatus, M. incertoides, Odontotermes  javanicus, Macrotermes gilvus, Schedorhinotermes javanicus, and Coptotermes  curvignathus. Various termite species prevail in two of the locations (P. Rebo and P. Minggu). M. insperatus was found to be the largest population in every location. Cempaka  Putih  was the lowest in similarity  and diversity  indexes of the termite  species. The same  termite species  was found in Kramat  Jati and Kebayoran Baru. No subterranean  termites  were found in Cilincing, Tanjung  Priok, and Kemayoran
PEMILAHAN JENIS KAYU KAPUR SINTOK (DRYOBALANOPS OOCARPA V. SI.) DARI JENIS-JENIS KAYU KAPUR LAINNYA Mandang, Y I
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2699.666 KB) | DOI: 10.20886/jphh.1987.4.2.56-59

Abstract

Kapur sintok  (Dryobalanops oocarpa  V. SI.) is the lightest and also the lowest in durability  among  the nine wood species of kapur.  It is there fore  necessary to separate  this wood species from   the other members,  but  it is difficult   to separate  based  on anatomical  characters.   A chemical spot  test proved  to be simple  and applicable. Kapur  sintok  responded  negatively  to the aplication  of 5 percent of ferric ammonium sulphate  while the other eight species responded positively.
PENGARUH SALINITAS TERHADAP SERANGAN PENGGEREK KAYU DI LAUT PADA BEBERAPA JENIS KAYU Muslich, Mohammad; Sumarni, Ginuk
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3153.18 KB) | DOI: 10.20886/jphh.1987.4.2.46-49

Abstract

Marine  borers are wood destroying  organisms  living in the sea, brackish  and estuarine  water. Environmental   conditions  such as salinity, pollution  and temperature  of  the sea water influence  the activities  and precence  of  marine  borers.One hundred pieces of wood from  five  species had been exposed  to marine borers in four  different  salinities for  nine months. The test sites chosen were around  Gulf  of Jakarta  i.e.  about 3 km off  shore, and at three  locations  along  a canal of  brackish fishpond,  respectively  in the estuary,  1  km  and 2 km from the shore.The result shows that at the sea site where the salinity  is relatively stable around 29 ‰ – 30‰ ,  all of the wood tested are badly attacked  by Mollusc  belonging  to the species of Martesia  striata  Linne.,  Dicyathifer  manni  Wright.,  and  Bankia  campanellata  Moll/Roch.    Along  the canal where the salinity is between 5‰-30‰, damage is only small.  The result also shows no sign of attack on all samples exposed  along the canals, although  the salinity is not significantly  different  from that of  the estuary.
PRODUKTIVITAS TENAGA KERJA PADA BEBERAPA KILANG KAYU LAPIS DI SUMATERA Abdurachman, Akub J; Sylviani, Sylviani
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5200.594 KB) | DOI: 10.20886/jphh.1987.4.2.60-65

Abstract

Plywood production can be increased by improving factory quality, work organization system, processing method, and by increasing the skill of the operators and other activities supporting labour productivity.Previous works indicated that low productivity of labour in plywood mill in Indonesia was mainly due to the low levels of education, skill and experiences of operators. This study is intended to obtain accurate data concerning this problem.The survey was conducted in several plywood industries in Sumatera in 1985 and revealed the following results:Average actual production of plywood mills is lower than the design production capacity.  The average ratio of actual production capacity is as low as 0.422.The productivity of employees varies between mills, especially for Managers. Managers productivity ranges from 45.2 to 242 cum/man/month (standard error 93.5 cum/man/month); administrative staff productivity 14.1-38.2 cum/man/month (standard error 9,6 cum/man/month);and operators:1.7-5.9 cum/man/month  (standard error 1.5 cum/man/month).Waging system in term of payment (monthly or others) and the amount of salary does not effect the productivity levels.
SIFAT PAPAN BLOK DENGAN INTI LIMBAH EKSPLOITASI HUTAN LAMPUNG Kliwon, Suwandi; Iskandar, M I; Sutigno, Paribotro
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3182.628 KB) | DOI: 10.20886/jphh.1987.4.2.16-20

Abstract

Blockboards   of six wood species of  logging  waste from  Lampung as core strip material were manufactured in the laboratory, and  their physical  and mechanical properties were tested.The average value of  moisture  content, board density  and strip  density  were 10.09%, 0.63  g/cm3  and 0.49  g/cm3, respectively.  Bending strength parallel to the grain varied between  690.47 kg/cm2  (red meranti)  and 1041.99 kg/cm2 (keruing).  The bending strength  perpendicular   to the grain varied between 112.40 kglcm2 (Bima) and 319.90 kg/cm2 (Pulai), and bending strength parallel to the grain were significantly affected by wood species, but bending strength  perpendicular to the grain  were not. 
PENGARUH PENAMBAHAN FENOL FORMALDEHIDA TERHADAP SIFAT HARDBOARD KAYU CAMPURAN BERDASARKAN PENGELOMPOKAN BERAT JENIS Siagian, Rena M
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5055.001 KB) | DOI: 10.20886/jphh.1987.4.2.10-15

Abstract

This paper deals with an experiment on the effect  of phenol formaldehyde binder on the properties  of hardboard.  The boards were made of mixed wood species of five specific gravity groups  i.e.  < 0.30; 0.31-0.45; 0.46-0.60; 0.61-0.75 and >  0.75.Pulping employed  in the experiment  was the hot caustic soda,  and the sheets  were formed   by using the laboratory  wet felting  process.  The phenol formaldehyde blended at pulp  slurry and presipitated  by adding alum  to reach pH  ± 7.2. The amount  of phenol formaldehyde added during sheet formation  was made at 1, 1.5, and 2 percent  based on the oven dry pulp.The experimental  result indicated  that a quality panels  could be obtained  by adding 1. 5 percent  of phenol formaldehyde  binder. Increasing the phenol formaldehyde binder up to 2 percent  did not improved  the physico-mechanical  properties  of the board produced.   The experiment  also shows that better physico-mechanical  properties  of hardboard sheets  were obtained from 0.30 up to 0.60...0.75 specific gravity groups.  The panels made of wood with specific gravity more  than 0.75, appeared  to have inferior  quality.
EMISI GAS FORMALDEHIDA PAPAN PARTIKEL DARI BEBERAPA JENIS KAYU Memed, Rozak
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2188.677 KB) | DOI: 10.20886/jphh.1987.4.2.27-29

Abstract

The result of determination of formaldehyde emission from particleboard samples glued  with urea formaldehyde and mixture  of UF and MF resin is reported in this paper. The particleboard  samples were selected from two different factories  in addition  to  those prepared  in the laboratory  at the center.The  values of formaldehyde emission  of particleboard  prepared  in the laboratory  are between 6.154 ppm (Jeungjing)  and  18.720 ppm (meranti kuning), from  factory  A between  0.295  ppm-7.710 ppm;  while from  factory  B between  13.246 ppm-23.691 ppm.  Board samples from factory A glued with mixture of  UF and MF  resins.  on the other  hand,  show an average emission  value of  0.295 ppm.
SIFAT VENIR DAN KAYU LAPIS 7 JENIS KAYU DARI MALUKU Iskandar, M I; Kliwon, Suwandi; Sutigno, Paribotro
Jurnal Penelitian Hasil Hutan Vol 4, No 2 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3736.451 KB) | DOI: 10.20886/jphh.1987.4.2.36-41

Abstract

 The characteristics studied  are peeling properties,  physical  properties  of  the veneer, gluing properties  and some physical  and  mechanical properties  of  the plywood   (both  triplex and multiplex).All logs from the 7 wood species could be peeled satisfactorily  in cold condition.   Veneer of  0.9 mm and 1.5  mm thickness  could be produced at a cutting  angle between  91°-93°.Average shrinkage  of  the veneer is 7%.  Average swelling from oven dry condition  is 3%.Water resistant,  bonding  strength  for all wood  species studied  meet Indonesian,   Japanese  and German standards. Average thickness reduction due to pressing in the plywood   manufacturing  process  is 0.15 mm.Specific  gravity  of  the plywood   is about  6 percent  higher than that  of  the wood from   which it is made  of

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