scholarly journals Effect of disodium octaborate tetrahydrate on the mechanical properties of Dendrocalamus asper bamboo treated by vacuum/pressure method

2019 ◽  
Vol 65 (1) ◽  
Author(s):  
Christian Gauss ◽  
Marzieh Kadivar ◽  
Holmer Savastano
Keyword(s):  
Mechanical Properties ◽  
Vacuum Pressure ◽  
Pressure Method ◽  
Dendrocalamus Asper ◽  
Disodium Octaborate Tetrahydrate

scholarly journals Investigation on cement-improved phyllite based on the vertical vibration compaction method

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0247599
Author(s):  
Yingjun Jiang ◽  
Jiangtao Fan ◽  
Yong Yi ◽  
Tian Tian ◽  
Kejia Yuan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Static Pressure ◽  
Cement Content ◽  
Vertical Vibration ◽  
Pressure Method ◽  
Vibration Compaction ◽  
Modulus Of Resilience ◽  
Compaction Method

The vertical vibration compaction method (VVCM), heavy compaction method and static pressure method were used to form phyllite specimens with different degrees of weathering. The influence of cement content, compactness, and compaction method on the mechanical properties of phyllite was studied. The mechanical properties of phyllite was evaluated in terms of unconfined compressive strength (Rc) and modulus of resilience (Ec). Further, test roads were paved along an expressway in China to demonstrate the feasibility of the highly weathered phyllite improvement technology. Results show that unweathered phyllite can be used as subgrade filler. In spite of increasing compactness, phyllite with a higher degree of weathering cannot meet the requirements for subgrade filler. With increasing cement content, Rc and Ec of the improved phyllite increases linearly. Rc and Ec increase by at least 15% and 17%, respectively, for every 1% increase in cement content and by at least 10% and 6%, respectively, for every 1% increase in compactness. The higher the degree of weathering of phyllite, the greater the degree of improvement of its mechanical properties.

Using kraft black liquor on coconut wood (Cocos nucifera) through impregnation with vacuum pressure method

2020 ◽  
Vol 17 (1) ◽  
pp. 82-89
Author(s):  
Rudi Dungani ◽  
Tati Karliati ◽  
Anne Hadiyane ◽  
Takashi Tanaka ◽  
Masaaki Yamada ◽  
...  
Keyword(s):  
Cocos Nucifera ◽  
Black Liquor ◽  
Vacuum Pressure ◽  
Pressure Method ◽  
Kraft Black Liquor

Physical and Mechanical Properties of Hybrid Laminated Bamboo-Wood Veneer Board (HLBWVB) for Furniture Components

2015 ◽  
Vol 1134 ◽  
pp. 143-146 ◽  
Author(s):  
Muhamad Iqram Ibrahim ◽  
Siti Rafedah Abd Karim ◽  
Tuan Anis Nadia Tuan Mohd Saipudin ◽  
Abdul Hamid Salleh
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Wood Veneer ◽  
Test Analysis ◽  
Laminated Bamboo ◽  
The Mean ◽  
Screw Withdrawal ◽  
Dendrocalamus Asper

In this study, betong bamboo (Dendrocalamus asper) veneers were laminated with sesenduk wood (Endospermum diadenum) veneers to form Hybrid Laminated Bamboo-Wood Veneer (HLBWVB) using urea formaldehyde (UF) as glue. The HLBWVB was pressed at two levels of pressure viz. 70 kg/cm2 and 130 kg/cm2. The physical properties such as moisture content (%), density (kg/m3) and de-lamination (%), and also the mechanical properties such as bending (MPa), screw withdrawal (N) and shear (MPa) were determined in accordance to BS:EN 1993. From an independent t-test analysis p≤0.05; it was found that there are significant differences in the mean of all variable tested except for delamination test. It is shown that high pressure gives the best physical and mechanical properties compare to lower pressure.

scholarly journals Slip Casting of Low Soda Alumina(Part 2). Vacuum-Pressure Assisted Slip Casting and Mechanical Properties of Sintered Body.

1993 ◽  
Vol 40 (8) ◽  
pp. 800-804 ◽  
Author(s):  
Saburo Sano ◽  
Hiroyuki Mizuta ◽  
Masaki Maeda ◽  
Hisahiro Teranishi ◽  
Kiichi Oda ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Slip Casting ◽  
Vacuum Pressure ◽  
Sintered Body

scholarly journals Effects of Resin Content on the Characteristics of Bamboo Oriented Strand Board Prepared from Strands of Betung, Ampel, and Their Mixtures

2021 ◽  
Vol 9 (3) ◽  
pp. 454-465
Author(s):  
Tengku Muhammad Renzy Hariz ◽  
Indra Agus Santosa ◽  
Muhammad Iqbal Maulana ◽  
Marwanto ◽  
Denni Prasetia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Dimensional Stability ◽  
Oriented Strand Board ◽  
Physical And Mechanical Properties ◽  
Resin Content ◽  
Thickness Swelling ◽  
Higher Dimensional ◽  
Bambusa Vulgaris ◽  
Dendrocalamus Asper

The objectives of this research were to evaluate bamboo-oriented strand board (BOSB) characteristics made from betung (Dendrocalamus asper), ampel (Bambusa vulgaris), and their mixtures at two different contents (3% and 5%) of methylene diphenyl di-isocyanate (MDI) adhesives. The strands were steam-treated at 126°C for 1 h under the pressure of 0.14 MPa. Three-layered BOSBs with a target density of 0.7 g/cm3 were made with the size of 30 cm x 30 cm x 0.9 cm and a shelling ratio of 1:2:1 (face:core:back layers). The physical and mechanical properties of BOSB were evaluated following JIS A 5908 (2003) standard, and the results were compared with the CSA 0437.0 Grade O-1 standard. The results show that BOSB from the mixtures of betung and ampel bamboo strands has higher dimensional stability as shown by the decrease in water absorption and thickness swelling and higher mechanical properties than single BOSB. All BOSBs with 5% resin content have higher dimensional stability, MOE, and MOR than BOSB with 3% resin content. The physical and mechanical properties of all BOSB manufactured met the CSA 0437.0 Grade O-1 standard. This study proved that BOSBs from the mixture of betung and ampel strands have the potential to be developed due to having better physical and mechanical qualities than a single BOSB. Keywords: ampel (Bambusa vulgaris), bamboo oriented strand board, betung (Dendrocalamus asper), resin content, strand mixtures

scholarly journals PEMBUATAN SELULOSA TERASETILASI DARI PULP BAMBU BETUNG (Dendrocalamus asper) SERTA PENGARUHNYA TERHADAP SIFAT MEKANIS BIOKOMPOSIT POLIPROPILENA

REAKTOR ◽  
2017 ◽  
Vol 17 (1) ◽  
pp. 25 ◽  
Author(s):  
Wida Banar Kusumaningrum ◽  
R Rochmadi ◽  
S Subyakto
Keyword(s):  
Mechanical Properties ◽  
Moisture Absorption ◽  
Catalyst Concentration ◽  
Natural Fiber ◽  
Polypropylene Composites ◽  
Strength Enhancement ◽  
Bamboo Pulp ◽  
Reinforcing Agent ◽  
Time Strength ◽  
Dendrocalamus Asper

Abstract ACETYLATED CELLULOSE FROM BETUNG BAMBOO (Dendrocalamus asper) PULP PRODUCTION AND ITS EFFECT ON MECHANICAL PROPERTIES OF POLYPROPYLENE COMPOSITES. The utilization of natural fiber as reinforcing agent for biocomposite products have some drawbacks, such as its hydrophilicity that are incompatible with PP. Isolation from bundle fibers into micro fibers could improves the biocomposite properties. However, more moisture absorption of micro fiber makes it difficult to handle. Therefore, modification with acetylation is needed to facilitate good interfacial adhesion between cellulose and PP. The objectives of this research are to obtain acetylated micro fibers from betung bamboo pulp for reinforcing agent and to investigate the effect of acetylated cellulose on mechanical properties of PP biocomposites. Acetate anhydride as acetylating agent and sulfuric acid as a catalyst were used for acetylation process. Acetylated cellulose from betung bamboo pulp with fibrous form, hydrophobic condition, and relatively on high aspect ratio was obtained in 2% of catalyst concentration and 120 of reaction time. Strength enhancement were achieved up to 79 and 87% for tensile while 24 and 69% for flexural, respectively for biocomposites with 10% and 20% of acetylated cellulose than that PP. Modulus improvement were obtained up to 53 and 70% for tensile while 96 and 149% for flexural, respectively for biocomposites with 10% and 20% of acetylated cellulose than that PP. Keywords: acetylation; betung bamboo; biocomposite; polypropylene; cellulose   Abstrak Penerapan serat alam untuk produk biokomposit memiliki beberapa kelemahan terutama perbedaan sifat antara matrik dengan serat yang menyebabkan ikatan antar muka yang kurang baik. Pengolahan serat bundle menjadi serat mikro dapat meningkatkan sifat-sifat biokomposit, akan tetapi sifat dari serat mikro yang mudah menyerap air membuat penanganannya menjadi lebih komplek. Modifikasi kimia serat dengan asetilasi merupakan upaya untuk meningkatkan keterbasahan dan ikatan antar muka dengan matrik PP. Tujuan dari penelitian ini adalah untuk memperoleh serat mikro terasetilasi dari pulp bambu betung agar dapat digunakan sebagai penguat dan mempelajari pengaruhnya terhadap sifat mekanis biokomposit PP. Proses asetilasi menggunakan asetat anhidrat sebagai bahan pengasetilasi dan asam sulfat sebagai katalis. Serat mikro bambu betung terasetilasi yang bersifat hidrofobik dan memiliki aspek rasio tinggi diperoleh pada jumlah katalis 2% dengan waktu 120 menit. Peningkatan kuat tekuk mencapai 76 dan 87% sedangkan kuat tarik sekitar 24 dan 69% masing-masing untuk biokomposit dengan selulosa terasetilasi 10% dan 20% terhadap PP murni. Keteguhan tarik meningkat hingga 53 dan 70% sedangkan keteguhan tekuk mencapai 96 dan 149% berturut-turut untuk biokomposit dengan 10% dan 20% selulosa terasetilasi dibandingkan PP. Selulosa terasetilasi dari pulp bambu betung mampu berfungsi sebagai bahan pembentuk inti untuk biokomposit PP. Kata kunci: asetilasi; bambu betung; biokomposit; polipropilena; selulosa

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