Effect of waterlogging on physical and mechanical properties of Samanea saman (Jacq.) Merr. tree

This research intends to explore the mechanical and physical properties of waterlogged rain tree (Samanea saman). The variation of mechanical and physical wood properties grown in waterlogged and non-waterlogged area were studied. Four trees of the species were selected from two areas. Important mechanical and physical properties were examined for the wood of two types of trees Oven dry density for the wood of waterlogged tree was 420 kg/m3 whether it was 550 kg/m3 for the wood of non-waterlogged tree. The MOR of wood of waterlogged tree was 58.2 N/mm2 and wood of non-waterlogged tree produced 78.1 N/mm2. The MOE of the wood of waterlogged tree and non-waterlogged tree were 1478 and 4876 N/mm2. The physical and mechanical properties were lower for the wood of waterlogged tree. Such findings may in proper uses of the species.Bangladesh J. Sci. Ind. Res. 52(1), 49-52, 2017

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Effect of waterlogged condition on wood properties of Acacia nilotica (L.) debile tree

Bangladesh Journal of Scientific and Industrial Research ◽

10.3329/bjsir.v50i2.24347 ◽

2015 ◽

Vol 50 (2) ◽

pp. 71-76

Author(s):

J Alam ◽

AK Das ◽

MM Rahman ◽

MA Islam

Keyword(s):

Mechanical Properties ◽

Physical Properties ◽

Physical And Mechanical Properties ◽

Wood Properties ◽

Acacia Nilotica ◽

Dry Density ◽

Waterlogged Condition ◽

Mechanical And Physical Properties ◽

The Right

This study is aimed to assess the mechanical and physical properties of waterlogging Acacia nilotica (babla). The important physical and mechanical properties were determined. The oven dry density of the wood of waterlogged tree and non-waterlogged tree was 780 and 850kg/m3. The MOR of the wood of waterlogged tree was 117N/mm2 while non-waterlogged tree showed the value of MOR 127N/mm2. The MOE of the wood of waterlogged tree and non-waterlogged tree was 1880 and 1950 N/mm2 respectively. The study of properties on A. nilotica wood grown in different conditions will help to choose the right type of its wood for suitable purposes.Bangladesh J. Sci. Ind. Res. 50(2), 71-76, 2015

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PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

Jurnal Riset Industri Hasil Hutan ◽

10.24111/jrihh.v4i1.1195 ◽

2012 ◽

Vol 4 (1) ◽

pp. 1

Author(s):

Djoko Purwanto

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Physical Properties ◽

Treatment Process ◽

Acacia Mangium ◽

Physical And Mechanical Properties ◽

Wood Fibers ◽

Test Parameters ◽

Mechanical And Physical Properties ◽

Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

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Anatomical, Chemical and Mechanical Properties of Fast-Growing Populus × Euramericana cv. ‘74/76’

IAWA Journal ◽

10.1163/22941932-00000057 ◽

2014 ◽

Vol 35 (2) ◽

pp. 158-169 ◽

Cited By ~ 1

Author(s):

Zhao Rongjun ◽

Yao Chunli ◽

Cheng Xianbao ◽

Lu Jianxiong ◽

Fei Benhua ◽

...

Keyword(s):

Mechanical Properties ◽

Sandy Loam ◽

Physical And Mechanical Properties ◽

Wood Properties ◽

Planting Density ◽

Dry Density ◽

Growth Rings ◽

Fast Growing ◽

Breast Height ◽

Large Growth

The anatomical characteristics, chemical composition, and physical and mechanical properties of fast-growing Populus × euramericana cv. ‘74/76’ juvenile wood were investigated. Four- to five-year-old clonal plantation trees were harvested from two different experimental sites in the suburbs of Beijing. The Shunyi site had black alkali soil with a planting density of 4 × 6 m and the Miyun site had sandy loam soil with a planting density of 3 × 5 m. The test results showed that the poplar trees from the two sites were both fast growing, with poplar at Shunyi growing faster than at Miyun. There were no significant differences in wood properties between trees grown at the two sites. Fiber length at breast height varied from 872 to 1300 μm between growth rings, average fiber width varied from 21.0 to 25.5 μm and double wall thickness varied from 5.0 to 6.6 μm. Average cellulose, lignin and hemicellulose contents in the samples were 48.9%, 25.4%, and 18.8%, respectively. MFA was higher in the first two growth rings (20–25°), and then decreased rapidly to 12° close to the bark. The average air-dry density at breast height was 401 kg/m3 while the average MOE at breast height was 9.3 GPa. The trees showed large growth rates in both height and stem diameter during the growing season. However, wood properties of the juvenile poplar appeared to be similar to those of poplars with a slower growth rate.

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PENENTUAN SIFAT MEKANIS DAN FISIS BATU BATA DENGAN PENAMBAHAN ARANG TEMPURUNG KELAPA ASAL ALOR

Jurnal Fisika : Fisika Sains dan Aplikasinya ◽

10.35508/fisa.v3i3.605 ◽

2018 ◽

Vol 3 (1) ◽

pp. 80-85

Author(s):

Ernawati Kawa ◽

Minsyahril Bukit ◽

Albert Zicko Johannes

Keyword(s):

Mechanical Properties ◽

Physical Properties ◽

Compression Strength ◽

Physical And Mechanical Properties ◽

Strength Test ◽

Coconut Shell ◽

Mechanical And Physical Properties ◽

Maximum Limit

Abstrak Telah dilakukan penelitian tentang penentuan sifat mekanis dan fisis batu bata dengan penambahan tempurung kelapa asal alor. Penenlitian ini bertujuan mengetahui kualitas batu bata yang memenuhi standar kelayakan sebagai bahan konstruksi dengan penambahan arang tempurung kelapa aal alor dengan presentasi 0%, 5%, 10%, 15% terhadap tanah liat (lempung). Batu bata dicetak dengan prosedur pemadatan, pengringn dan pembakaran. Setelah prosedur pencetakkan selesai kemudian di lanjutkan dengan pengujian sefat mekanis dan sifat fisis, yaitu uji kuat tekan (compression strength), densitas (density), porositas (porosity) hasil kuat tekan batu bata didapatkan berdasarkan pengujian: a) uji kuat tekan, batu bata tanpa penambahan (0%) : 4,94 meemenuhi standar kuat tekan kelas 50 (SNI 15-2094-2000), b) uji porositas, batu bata 0% dan 5% : 3,82% dan 17,93% memenuhi standar porositas dengan batas maksimum 20% (SNI 15-2094-2000) dan uji densitas, batu bata tidak ada yang memenuhi standar (SII 0021-1978) Kata kunci: sifat mekanis, sifat fisis, tempurung kelapa, densitas, porositas, kuat tekan Abstract A research had been conducted to determine physical and mechanical properties of the bricks with the addition coconut shell charcoal from alor. This research aims at the quality of the bricks to meet the standars of eligibility as a contruction material. The addition of coconut shell charcoal is variate with the presentage 0%, 5%, 10%, 15% to the clay mass. The brick being printed with procedure compaction, drying, and baking. After the printing procedure is done then next is testing the mechanical and physical properties, that is compression strength test, density test, and porosity test. The brick quality result is obtained based on the test: a) compression strength test, the brick without addition (0%) : 4,94 (SNI 15-2094-2000) is comply with the standard compression strength the class 50 , b) porosity test, the brick 0% and 5% (3,82% and 17,93%) meet the standard with the maximum limit 20% ( SNI 15-2094-2000) , and c) density test, every bricks does not meet the standard (SII 0021- 1978). Keywords: mechanical properties, physical properties, coconut shell, density, porosity, compression strength

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Mechanical and physical properties of fine-grained concrete for concrete additive manufacturing

E3S Web of Conferences ◽

10.1051/e3sconf/20199102041 ◽

2019 ◽

Vol 91 ◽

pp. 02041

Author(s):

Sergey Udodov ◽

Yuriy Galkin ◽

Philip Belov

Keyword(s):

Mechanical Properties ◽

Additive Manufacturing ◽

3D Printing ◽

Physical Properties ◽

Crucial Role ◽

Physical And Mechanical Properties ◽

Concrete Composition ◽

Fine Grained ◽

Mechanical And Physical Properties ◽

Time Periods

Additive manufacturing (3D printing) is becoming more and more common in the field of modern construction. However, for wider implementation of this technology, it is necessary to solve a number of material-oriented scientific problems related to development of concrete composition with targeted rheological, stress-strain, physical and mechanical properties. It has been established that time periods between successful applications of layers play the crucial role in ensuring monolithic features of the “printed” structures. Application of mathematics planning of the experiment allowed establishing the main principles of formation of basic physical and mechanical properties of fine-grained concrete depending on material composition.

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Effects of Antioxidants Content on the Physical and Mechanical Properties of Wood Plastic Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.471-472.151 ◽

2011 ◽

Vol 471-472 ◽

pp. 151-156 ◽

Cited By ~ 2

Author(s):

Mohd Hafizuddin Ab Ghani ◽

Ahmad Haji Sahrim

Keyword(s):

Mechanical Properties ◽

Physical Properties ◽

High Density Polyethylene ◽

Natural Fibers ◽

Physical And Mechanical Properties ◽

Screw Extruder ◽

Wood Plastic Composites ◽

Plastic Composites ◽

Mechanical And Physical Properties ◽

Twin Screw

We investigated the effects of amount of antioxidants variability on selected mechanical and physical properties of wood plastic composites. Recycled high density polyethylene (rHDPE) and natural fibers were compounded into pellets by compounder, then the pellets were extruded using co-rotating twin-screw extruder and test specimens were prepared by hot and cold press process. From the study, samples with 0.5 wt% of antioxidants produce the highest strength and elasticity of composites. The effect of antioxidants presence on water uptake is minimal.

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SIFAT FISIKA DAN MEKANIKA KAYU JABON MERAH (Anthocephalus macrophyllus) YANG DITANAM DI WONOGIRI, 2 JAWA TENGAH

Jurnal Hutan Tropis ◽

10.20527/jht.v8i3.9739 ◽

2020 ◽

Vol 8 (3) ◽

pp. 357

Author(s):

Fanny Hidayati ◽

Sri Sunarti ◽

Teguh Setiaji ◽

Arif Nirsatmanto

Keyword(s):

Mechanical Properties ◽

Mechanical Characteristics ◽

Bending Strength ◽

Physical And Mechanical Properties ◽

Wood Properties ◽

Dry Density ◽

Improvement Program ◽

Average Value ◽

Central Java ◽

Physical And Mechanical Characteristics

Red jabon is one of the fast growing species. It is growth well in tropical countries. It has a potential to fulfill the demand of wood. Tree imrovement program of this species has been done in Indonesia. However, information of wood properties related to tree improvement program of red jabon is limited. Therefore, wood properties such as physical and mechanical properties of this species at the progeny trial were needed to clarify. The aims of this research were to clarify the variation of physical and mechanical properties of red jabon from 5 families at5-year-old planted in Wonogiri, Central Java and relationship between air-dry density and mechanical properties. As the result, physical and mechanical properties were varied among 5 families. Based on the results, famili number 85 performed good result of physical and mechanical characteristics, eventhough the physical properties were not highest among 5 families but it was abouf the average value. Furthermore, this family showed the best values of all mechanichal characteristics tested. In addition, air-dry density has highly positive significantcorrelation with mechanical properties (static bending strength and compressive strength parallel to grain), suggesting that mechanical properties can be predicted by air-dried density.

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Mechanical and Physical Properties of Oriented Strand Lumber (OSL): The Effect of Fortification Level of Nanowollastonite on UF Resin

Polymers ◽

10.3390/polym11111884 ◽

2019 ◽

Vol 11 (11) ◽

pp. 1884 ◽

Cited By ~ 10

Author(s):

Hassani ◽

Taghiyari ◽

Schmidt ◽

Maleki ◽

Papadopoulos

Keyword(s):

Mechanical Properties ◽

Physical Properties ◽

Urea Formaldehyde ◽

Physical And Mechanical Properties ◽

Formaldehyde Resin ◽

Hydroxyl Groups ◽

Optimum Level ◽

Uf Resin ◽

Mechanical And Physical Properties ◽

Resin Curing

The aim of this work is to investigate the effect of the fortification level of nanowollastonite on urea-formaldehyde resin (UF) and its effect on mechanical and physical properties of oriented strand lumbers (OSL). Two resin contents are applied, namely, 8% and 10%. Nanowollastonite is mixed with the resin at two levels (10% and 20%). It is found that the fortification of UF resin with 10% nanowollastonite can be considered as an optimum level. When nanowollastonite content is higher (that is, 20%), higher volume of UF resin is left over from the process of sticking the strips together, and therefore is absorbed by wollastonite nanofibers. The mechanism involved in the fortification of UF resin with nanowollastonite, which results in an improvement of thickness swelling values, can be attributed to the following two main factors: (i) nanowollastonite compounds making active bonds with the cellulose hydroxyl groups, putting them out of reach for bonding with the water molecules and (ii) high thermal conductivity coefficient of wollastonite improving the transfer of heat to different layers of the OSL mat, facilitating better and more complete resin curing. Since nanowollastonite contributes to making bonds between the wood strips, which consequently improves physical and mechanical properties, its use can be safely recommended in the OSL production process to improve the physical and mechanical properties of the panel.

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Effects of Premixing Wood Flour with Compatibilizer with Different Characteristics on the Physical and Mechanical Properties of Wood/Plastic Composites

Forest Products Journal ◽

10.13073/fpj-d-18-00040 ◽

2019 ◽

Vol 69 (2) ◽

pp. 141-147

Author(s):

Kazushige Murayama ◽

Yoichi Kojima ◽

Hikaru Kobori ◽

Kenji Aoki ◽

Shigehiko Suzuki ◽

...

Keyword(s):

Mechanical Properties ◽

Molecular Weight ◽

Physical Properties ◽

Shear Viscosity ◽

Wood Flour ◽

Physical And Mechanical Properties ◽

Plastic Composites ◽

Mechanical And Physical Properties ◽

One Step ◽

Mixing Method

Abstract The addition of maleic anhydride (MA)-modified polypropylene (MAPP) as a compatibilizer increases mechanical and physical properties of wood/plastic composites (WPCs). It is thought that MA graft ratio (Gr), molecular weight (weight-average molecular weight [Mw]), and mixing methods of MAPP affect physical and mechanical properties of WPCs. However, evaluation, especially for mixing order, is not enough. The objective of this study was to investigate the effect of Gr and Mw of MAPP and its mixing methods on the mechanical and physical properties of WPCs. Two types of mixing methods were used: mixing the MAPP with the filler using a Henschel mixer before kneading with PP (premixing method) and mixing all of the materials at one time (one-step mixing method). The WPCs made with the premixing method had lower shear viscosity and higher flexural modulus than those made with the one-step mixing method. The particle size, moisture content, and surface morphology of fillers are thought to be more important in determining the shear viscosity of WPCs than the MAPP itself. The highest tensile, impact, and flexural strengths of WPCs were obtained in the WPC with premixing with low-Gr and high-Mw MAPP. It may be due to the effective reaction of the wood flour with MAPP and higher entanglement between the MAPP and PP. These results suggest that the premixing method could improve productivity and mechanical properties of WPCs.

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BRUSH ALLOY 3

Alloy Digest ◽

10.31399/asm.ad.cu0454 ◽

1983 ◽

Vol 32 (3) ◽

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Corrosion Resistance ◽

Physical Properties ◽

Copper Alloy ◽

Elevated Temperatures ◽

Physical And Mechanical Properties ◽

Heat Treating ◽

Good Resistance ◽

Good Corrosion Resistance

Abstract BRUSH Alloy 3 offers the highest electrical and thermal conductivity of any beryllium-copper alloy. It possesses an excellent combination of moderate strength, good corrosion resistance and good resistance to moderately elevated temperatures. Because of its unique physical and mechanical properties, Brush Alloy 3 finds widespread use in welding applications (RWMA Class 3), current-carrying springs, switch and instrument parts and similar components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as casting, forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-454. Producer or source: Brush Wellman Inc..

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