scholarly journals Analysis of the Composition and Physical and Mechanical Properties of Raw Materials for Thermal Insulation Fabrics

Engineering ◽  
2021 ◽  
Vol 13 (06) ◽  
pp. 352-359
Author(s):  
Juramirza Abdiramatovich Kayumov ◽  
Matluba Nazarova ◽  
Bohodir Vohobjon Ogli Obilov ◽  
Farhodjon Mahmudjonovich Dadaboyev ◽  
Zuhra Yigitaliyevna Mamadaliyeva
Keyword(s):  
Mechanical Properties ◽  
Thermal Insulation ◽  
Raw Materials ◽  
Physical And Mechanical Properties

scholarly journals Acoustic absorption and thermal insulation of wood panels: Influence of porosity

BioResources ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. 3746-3757
Author(s):  
Marilia da Silva Bertolini ◽  
César Augusto Galvão de Morais ◽  
André Luis Christoforo ◽  
Stelamaris Rolla Bertoli ◽  
Wilson Nunes dos Santos ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Sound Absorption ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Pressing Pressure ◽  
Reverberation Chamber ◽  
Polyurethane Resin ◽  
Highly Porous

The development of materials that offer environmental comfort inside buildings, through adequate thermal and acoustic behavior, has been as relevant as the search for raw materials of renewable origin. In this context, this study produced and characterized panels made with Pinus sp. waste materials, which were treated with a copper chrome boric oxide preservative and a castor-oil based polyurethane resin. The physical and mechanical properties of the panels were evaluated according to the ABNT NBR 14810 standard (2013). The panel porosity was investigated by scanning electron microscopy (SEM) and mercury intrusion porosimetry techniques. The sound absorption was analyzed by a reverberation chamber and thermal conductivity by the modified fractionated column method. Samples with a higher pressing pressure (4 MPa) during the manufacturing presented lower thickness swelling and higher mechanical properties in static bending. Panels made with a lower press pressure (2.5 MPa) resulted in a higher porosity volume (55.7%). The more highly porous panels were more acoustically efficient, with a sound absorption coefficient close to 0.8 at 3.2 kHz, and they had a better thermal conductivity performance.The potential of these panels for application where sound absorption and thermal insulation are prioritized is thus observed.

scholarly journals KUALITAS PAPAN PARTIKEL BERDASARKAN KOMPOSISI SEKAM PADI DAN KAYU SENGON DENGAN VARIASI KADAR PEREKAT

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Dendi Prayoga ◽  
. Dirhamsyah ◽  
. Nurhaida
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Rice Husk ◽  
Raw Materials ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Solid Content ◽  
Particle Board ◽  
Rice Husks ◽  
Wood Processing

This research aimed to examine the physical and mechanical properties of particle boards based on the composition of raw materials and adhesive content and know the treatment of the composition of raw materials and the best adhesive content and meet the standard JIS A 5908-2003. The research was conducted at Wood Workshop Laboratory, Wood Processing Laboratory Faculty of Forestry,Tanjungpura University and Laboratory of PT. Duta Pertiwi Nusantara Pontianak. The adhesive used is Urea Formaldehyde with 52% Solid Content. Comparison of the composition of rice husks and sengon varies namely rice husk 50%: sengon 50%, rice husk 60%: sengon 40% and rice husk 70%: sengon 30%  and variations in the levels of UF adhesives, namely 14% and 16%, with target density 0,7 gr/cm3. The particleboard was 30 cm x 30 cm x 1 cm Pressing at temperature 140oC for 8 minutes, with  pressure of 25 kg/cm2. The research results of the study of density and moisture content meet the standards JIS A 5908-2003. The best particle values of rice husk and sengon  with composition a ratio of  rice husk 50%: sengon 50% , 16% adhesive content  16%, with density value of  0,7072 gr/cm3, moisture content 9,1949 %, thick development 12,3210 %, water absorption 68,8270 %, MOE 12110,7273 kg/cm2, MOR 161,0025 kg/cm2, firmness sticky 1,9320 kg/cm2, screw holding strength 62,3124 kg.Keywords : adhesive, composition, particle board, rice husk, sengon

scholarly journals SIFAT FISIK DAN MEKANIK PAPAN GIPSUM DARI LIMBAH KAYU AKASIA (Acacia mangium Willd) BERDASARKAN KADAR GIPSUM DAN UKURAN SERBUK KAYU

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Ridho Pratama ◽  
M Dirhamsyah ◽  
. Nurhaida
Keyword(s):  
Mechanical Properties ◽  
Raw Materials ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Powder Size ◽  
Wood Powder ◽  
Gypsum Board ◽  
Randomized Design ◽  
Gypsum Content ◽  
Two Factors

This study aims to examine the physical and mechanical properties of gypsum board from Acacia mangium Willd wood waste based on gypsum content and wood powder size. This study refers to the JIS A 5417-1992 standard. This research were conducted at Wood Work Shop laboratory for the preparation of raw materials, Wood Technology laboratory Faculty of Forestry for board making and testing the physical properties of gypsum boards, and  PT. Duta Pertiwi Nusantara laboratory to test the mechanical properties of the gypsum board. The material used is  A. mangium W. Wood powder, gypsum flour, water and borax. The study uses Factorial Completely Randomized Design (CRD) with two factors, namely factor A (gypsum content) which consists of gypsum content of 400%, 500% and 600% of the weight of A. mangium W. wood powder, and factors B (wood powder size) consists of 20 mesh passes 40 mesh retained and 40 mesh passes 60 mesh retained. The results showed that the density (600% gypsum content of 40 and 60 mesh retained wood powder size), moisture content, thickness swelling, MOE (600% gypsum content of 40 and 60 mesh retained wood powder size) fulfill JIS A5417-1992 standard. The best gypsum board is gypsum board with gypsum content of 600% with a wood powder size is 40 mesh.Keyword: Acacia mangium, gypsum board, gypsum content, wood powder size.

scholarly journals Physical and mechanical properties of composites based on hemp shives and lime

2018 ◽  
Vol 49 ◽  
pp. 00010 ◽  
Author(s):  
Przemysław Brzyski ◽  
Grzegorz Łagód
Keyword(s):  
Mechanical Properties ◽  
Thermal Insulation ◽  
Thermal Conductivity Coefficient ◽  
Positive Impact ◽  
Physical And Mechanical Properties ◽  
Wall Material ◽  
High Porosity ◽  
Plant Origin ◽  
Timber Frame ◽  
Properties Of Composites

One of the objectives of sustainable development in construction is the use of low-processed materials. They have a positive impact on the ecological balance of the building throughout the entire life cycle. Examples of such materials are materials of plant origin - straw, shives, cellulose fibers. They are used as thermal insulation or wall material. In recent years, hemp shives are increasingly used as a component of a lime-based composite, which performs the function of wall filling in timber frame constructions. The shives, due to the high porosity, determine the high thermal insulation properties of the composite. The physico-mechanical properties of the composite can be modified depending on various factors, including the ratio of hemp shives to the binder. The lime binder, in turn, can be modified by hydraulic and pozzolan additives. The paper presents mechanical properties (compressive and flexural strength) as well as physical properties (density, porosity, thermal conductivity coefficient, absorbability) of composites with various proportions of hemp shives of the Bialobrzeskie variety to the lime binder modified with Portland cement and metakaolinite.

Development of Fly Ash-Based Geopolymer Lightweight Bricks Using Foaming Agent - A Review

2015 ◽  
Vol 660 ◽  
pp. 9-16 ◽  
Author(s):  
Wan Mastura Wan Ibrahim ◽  
Kamarudin Hussin ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Aeslina Abdul Kadir ◽  
Mohammed Binhussain
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Building Material ◽  
Raw Materials ◽  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Foaming Agent ◽  
Positive Effects ◽  
The World ◽  
Great Development

Bricks are widely used as a construction and building material due to its properties. Recent years have seen a great development in new types of inorganic cementitious binders called ‘‘geopolymeric cement’’ around the world. This prompted its use in bricks, which improves the greenness of ordinary bricks. The development of fly ash-based geopolymer lightweight bricks is relatively new in the field of construction materials. This paper reviews the uses of fly ash as a raw materials and addition of foaming agent to the geopolymeric mixture to produce lightweight bricks. The effects on their physical and mechanical properties have been discussed. Most manufactured bricks with incorporation of foaming agent have shown positive effects by producing lightweight bricks, increased porosity and improved the thermal conductivities of fly ash-based geopolymer bricks. However, less of performances in number of cases in terms of mechanical properties were also demonstrated.

scholarly journals Analysis Physical and Mechanical Of Particle Boards Raw Materials Nipah Fruit Fiber

Teknomekanik ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 14-19
Author(s):  
M Saddikin ◽  
Hendri Nurdin ◽  
Primawati Primawati
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Average Density ◽  
Raw Material ◽  
Average Moisture Content ◽  
Particle Board ◽  
Wood Particles ◽  
Tapioca Flour

The raw materials of the timber industry, especially furniture, are increasingly difficult to obtain in the quantity and quality needed. The development efforts carried out were utilizing Nipah coir waste as a raw material for making particle boards. Particle boards are panel boards made of wood particles or materials containing lignocellulose. Nipah plants contain 27.3% lignin and 36.5% cellulose which has the potential to be used as raw material for particleboard production. This study aims to reveal the physical and mechanical properties of particleboards made from Nipah fruit fibre with adhesive using tapioca flour. The making of particle board is done with a ratio of 90%: 10%, 80%: 20%, 70%: 30%, 60%: 40%, by giving a pressure of 100 kg / cm2. Particle testing is carried out according to the JIS A 5908 standard (2003). From this study, the optimum results were obtained in variations of 60%:40%. The particle physical properties which have an average density value of 1.15 gr / cm3 and an average moisture content of 5.8%. While the mechanical properties obtained by the value of Modulus of Elasticity an average of 21,188.93 kg / cm2. This shows the particle board variations of 60%: 40% produced to meet the JIS A 5908 (2003) standard. Based on the analysis of the quality variations 60%: 40% of particle boards can be recommended as raw materials for interior furniture.

Dispersing the Charge as a Way to Improve the Quality of Ceramic Bricks

2018 ◽  
Vol 931 ◽  
pp. 558-563 ◽  
Author(s):  
Viktoriya A. Guryeva ◽  
Viktor V. Dubineckij ◽  
Aleksandr V. Doroshin
Keyword(s):  
Mechanical Properties ◽  
Original Composition ◽  
Water Absorption ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Dust Particles ◽  
Drill Cuttings ◽  
Additional Processing ◽  
Grinding Time

Investigations of the influence of dispersion of feedstock on the basis of clay of the Buguruslan deposit and drill cuttings from the facilities of PJSC «Orenburgneft» have been carried out, it is revealed that as the grinding time increases, the content of clay and dust particles increases. Intensive sintering of the samples between 1000 °C and 1100 °C has been established, which is confirmed by the compaction of the samples and the decrease in the water absorption of the ceramic masses. Minimal water absorption, within 2.35%, showed a sample of 3-hour grinding, and a sample of a 2-hour grinding of 8.34%. As a result of the study of dispersion of the charge on the basis of clay raw materials and drill cuttings, it was found that by subjecting the original composition to additional processing, within 2 hours, the physical and mechanical properties of ceramic bricks can be improved.

scholarly journals Compressed Flexible Steel Reinforced Concrete Elements Investigation

2018 ◽  
Vol 7 (3.2) ◽  
pp. 436
Author(s):  
Leonid Storozhenko ◽  
Pavlo Semko ◽  
Olena Yefimenko
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Strain State ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Experimental Sample ◽  
Sample Design ◽  
Stress Strain ◽  
Steel Reinforced Concrete ◽  
Concrete Elements

Stress-strain state and compressed flexible steel-reinforced concrete elements resistance capacity are investigated in the work. The experiment program is complied and steel reinforced concrete elements calculations methods are analyzed. Experimental sample design drawings are shown. Raw materials physical and mechanical properties are determined. Steel reinforced-concrete elements experimental and research studies have been carried out. Coboundary dependences N-M for steel reinforced concrete elements construction method is proposed. Resistance capacity diagrams for steel reinforced concrete elements are constructed depending on the element height and the applied eccentricity.  

Karakteristik Cross Laminated Timber (CLT) dari Kayu Jati Platinum Hasil Penjarangan dan Limbah Batang Kelapa Sawit (Characteristic of Cross Laminated Timber (CLT) from Thinned Platinum Teak and Oil Palm Stem Waste)

2020 ◽  
Vol 8 (3) ◽  
pp. 340
Author(s):  
Dimas Triwibowo ◽  
Prabu Satria Sejati ◽  
Mohamad Gopar ◽  
Sudarmanto Sudarmanto ◽  
Fazhar Akbar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Oil Palm ◽  
Elaeis Guineensis ◽  
Raw Materials ◽  
Flexural Modulus ◽  
Physical And Mechanical Properties ◽  
Tectona Grandis ◽  
Type A ◽  
Type B ◽  
Cross Laminated Timber

The aim of this study was to determine the physical and mechanical properties of Cross laminated timber (CLT) made from oil palm (Elaeis guineensis. Jacq) stem waste combined with thinned platinum teak (Tectona grandis ) wood. CLT was made into two types, namely CLT type A (teak-palm-teak) and CLT type B (teak-teak-teak). The CLT was 150 cm in length and 20 cm in width, with variation of the thickness of 3,0 cm, 4,5 cm, and 6,0 cm, and the glue spread of 300 g/m². The results showed that CLT type B has better physical and mechanical properties than CLT type A. Generally, CLT made of lamina with a thickness of 4,5 cm showed the best performance of physical and mechanical properties. Platinum teak and palm oil stem waste have the potential to be used as a source of CLT raw materials because of the moisture content, flexural modulus (MOE), and fracture modulus (MOR) that meet the JAS 1152 standard.Keywords: Cross laminated timber, platinum teak, oil palm stem, physical properties, mechanical properties

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