Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

P-Index

This Author published in this journals

All Journal Jurnal Ilmu dan Teknologi Kayu Tropis Jurnal Penelitian Hasil Hutan

Nurwati Hadjib

Unknown Affiliation

Author-ID : 3653768

Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Materials Science & Nanotechnology

Published : 4 Documents Claim Missing Document

Claim Missing Document

Articles

Pengaruh Umur Panen Pinus Hutan Tanaman terhadap Kualitas Kayu Pertukangan Effect of Harvesting Age of Pine from Forest Plantation on Quality of Wood Construction Materials Nurwati Hadjib; Osly Rachman
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 1 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Research on some properties of wood Pine (Pinus merkusii Jungh et de Vriese) to determine technical rotation for wood construction materials matched to the technical requirements. Pine wood investigated originated from KPH Sukabumi, West Java, from site index III and age of 17, 21, 23, 27 and 28 years. The results showed that morphology, diameter at breast height (DBH), sawing recovery, volume, veneer recovery and bonding strength were not significantly different at 95% confidence level. DBH and cylindricity tend to increase from age of 17 years until 27 years and decrease at 28 years in parabolic. The maximum DBH reach at 25 years, while cylindricity at 26 years. The sawing recovery tends to increase from 17 to 21 years, decrease at 23 years and increase at 27 years. Screw withdrawal resistance of five age level wood tested were significantly different. The relationship between age and wood properties tested tends to the same pattern, paraboloid, while volume and veneer recovery were linear. Differentiated of these equation showed that maximum DBH reach at age of 25, sawing recovery 28 years, maximum density and screw withdrawal resistance at 23 years, bonding strength and wettability at 22 years. Based on its machining properties, wood from 17-21 years belong to class II, and class I for 23 ~ 28 years.

Sifat Fisis dan Mekanis Sepuluh Provenans Kayu Mangium (Acacia mangium Willd.) dari Parung Panjang, Jawa Barat Physical and Mechanical Properties of Ten Mangium Wood (Acacia mangium Willd.) Provenances from Parung Panjang, West Java Nurwati Hadjib; Yusuf Sudo Hadi; Dian Setyaningsih
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 5, No 1 (2007): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Physical and mechanical properties of ten Mangium provenances have been studied in Forest Products Research and Development Center Bogor. The 14 years old Mangium was from Parung Panjang, Bogor, West Java, and the provenances were Kiriwo/Scrisa WP-PNG, Wipin District-PNG, Kini WP-PNG, Claudia River-Qld, Lake Muray-PNG, Mata Area WP-PNG, Bimadebun Village WP-PNG, Bilimo District-PNG, Kuru-PNG and Arufi Village-PNG. Test methods were referring to ASTM D.143-94 (ASTM 2002) for Methods of Testing Small Clear Specimen of Timber. The results showed that the highest density was Bimadebun Village WP-PNG (0.559 g/cm3) and the lowest was Kiriwo/Serisa WP-PNG (0.493 g/cm3), the highest MOE was Bimadebun Village WP-PNG (101,297 kg/cm2) and the lowest was Wipin District-NG (79,211 kg/cm2), the highest MOR was Bimadebun Village WP-PNG (708.5 kg/cm2) and the lowest was Kini WP-PNG (596.2 kg/cm2), the highest compression strength parallel to grain was Bimadebun Village WP-PNG (421.9 kg/cm2) and the lowest was Wipin District-PNG (342.1 kg/cm2), the highest shearing strength parallel to grain at radial was Arufi Village-PNG (66.2 kg/cm2) and the lowest was Claudia River-QLD (56.4 kg/cm2), the highest shearing strength parallel to grain at tangential was Kuru-PNG (74.4 kg/cm2) and the lowest was Lake Muray-PNG (48.3 kg/cm2). Based on values of its density, compression strength parallel to grain, shearing strength parallel to grain, the best Mangium provenance from Parung Panjang can be ordered as follow (1) Bimadebun Village WP-PNG, (2) Kuru-PNG, (3) Mata Area-PNG, (4) Arufi Village-PNG, (5) Bilimo District-PNG, (6) Kini WP-PNG, (7) Wipin District-PNG, (8) Kiriwo Serisa-PNG, (9) Claudia River-QLD and (10) Lake Muray-PNG.

KARAKTERISTIK FISIS DAN MEKANIS GLULAM JATI, MANGIUM DAN TREMBESI Nurwati Hadjib; Abdurachman; Efrida Basri
Jurnal Penelitian Hasil Hutan Vol. 33 No. 2 (2015): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2015.33.2.105-114

This paper studies the physical and mechanical characteristics of the glued-laminated (glulam) beams made from small diameter of three fast growing species i.e. teak (Tectona grandis L.f), mangium (Acacia mangium Willd.) and trembesi/monkeypod (Samanea saman Merr.) using water based polymer isocyanate (WBPI) as a binder. Six plies of wood combination species were laminated into final dimension of 6 cm × 12 cm × 300 cm. Each laminate was graded using Machine Stress Grading (Pantek, plank sorter) to determine its Modulus of Elasticity (MOE). Cross-section of two type of glulam beam was 6 cm × 12 cm, arranged of various widths and based on values of laminate MOE. Results show that the average and range value of the glulam density were 0.658 g/cm³ and 0.557-0.821 g/cm³, with the moisture content of 14.6% (13-16.8%). The average of the glulam modulus of elasticity and modulus of rupture were 75.51 (37.016-120.446) kg/cm² and 494 (145-750) kg/cm² respectively. The glulam made from teak has better MOE and MOR performances compared to those of mangium and trembesi. In general, the results showed that almost all of glulam beams tested meet requirement of JAS (Japanese Agricultural Standard) 2007 for structural glulam in moisture content, MOE, MOR, and shear strength. The glulam qualities can be classified into E65-E95-F225-F270, except for several species combination beams. Based on the strength classified and the ratio of S/W, the glulam can be used as a construction material except glulam teak-trembesi (preserved or unpreserved) and the unpreserved trembesi-trembesi. The three types of glulam can be utilized for the lightweight construction.

SIFAT BALOK KOMPOSIT KOMBINASI BAMBU DAN KAYU Abdurachman; Nurwati Hadjib; Jasni; Jamal Balfas
Jurnal Penelitian Hasil Hutan Vol. 33 No. 2 (2015): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2015.33.2.115-124

Combination of bamboo and wood composite beam is one possible laminated product to be developed. Generally, the composite product of solid wood meet the strength requirement for construction. However, composite beam combination of bamboo and wood has not been studied intensively. This paper observes the properties of composite combination of three bamboo species: andong, petung and ori with jabon wood species using isocyanate glue and merbau extracts. In order to improve composite’s durability, bamboo and jabon wood were preserved using 7% of boric acid and borax. Result shows composite beam combination of bamboo and jabon wood bonded with isocyanate is found to be the best composition in term of physical and mechanical properties. The density of the composite beam is 0.64 g/cm³ in 9.70% moisture content. Modulus of Elasticity (MOE) 78,168 kg/cm², Modulus of Rupture (MOR) 384 kg/cm² and compression parallel to the glue line is 378 kg/cm².

Co-Authors Abdurachman Dian Setyaningsih Efrida Basri Jamal Balfas Jasni Osly Rachman Yusuf Sudo Hadi

Title

Found 4 Documents
Search

Abstract

Abstract

Abstract

Abstract

Title Search

Found 4 Documents Search

Abstract

Abstract

Abstract

Abstract

Title

Found 4 Documents
Search