Mechanical Properties of Fir Sawdust Composite Modified by Basalt Glass Powder

2012 ◽  
Vol 627 ◽  
pp. 734-736
Author(s):  
Kai Fang Xie ◽  
Hua Wu Liu ◽  
Wei Wei Hu ◽  
Han Sun ◽  
Shu Wei Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Fire Resistance ◽  
Glass Powder ◽  
Bending Strength ◽  
Moisture Sorption ◽  
Weight Fraction ◽  
Basalt Glass ◽  
Temperature Conditions ◽  
The Stability

Fir sawdust panel was modified by basalt glass powder, in order to improve the stability during moisture sorption, durability under frequently wear, and fire resistance for working in high temperature conditions. The strengths of the modified panels were evaluated in this study. The maximum tensile 21.964MPa was reached when the weight fraction of basalt glass power was 15%, which was 86.58% stronger than the panel without basalt glass powder. When the content of basalt glass powder was 10%, the bending strength of the fir sawdust panel reached the maximum 37.9MPa, and was improved by 38.21%. However, the influence of the reinforcement to the elongation was negligible.

Design Study of Steel Structure Fire-Retardant Coatings under High Temperature (Fire) Conditions

2012 ◽  
Vol 594-597 ◽  
pp. 849-859
Author(s):  
Man Li Ou ◽  
Wei Jun Cao ◽  
Long Min Jiang ◽  
Hui Cao
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Fire Resistance ◽  
Fire Protection ◽  
Structural Damage ◽  
Fire Retardant ◽  
Steel Structure ◽  
Steel Structures ◽  
Strength And Stiffness ◽  
Fire Conditions

As the result of great changes occurring to mechanical properties under high temperature (fire) conditions, steel structures will soon lose the strength and stiffness and lead to structural damage. Through analysis of the steel structure fire resistance design methods under the conditions of high temperature (fire), this article explores the most used fire protection methods in steel structures—brushing or painting fire-resistant coatings, studies the fire-resistance theory of steel structure under fire conditions; in addition, the author proposes the reasonable thickness of the steel structure fire retardant coating of fire-resistant design through design examples.

Synthesis of SiC Ceramics from Coal Gangue

2005 ◽  
Vol 486-487 ◽  
pp. 378-381 ◽  
Author(s):  
Shu Hai Jia
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Carbon Black ◽  
Bending Strength ◽  
Coal Gangue ◽  
Holding Time ◽  
Crystal Phase ◽  
Sic Ceramics ◽  
N2 Atmosphere

The synthesis and the sintering of SiC from coal gangue by carbothermal synthesized in N2 atmosphere are studied. The material, 5 percent carbon black added and sintered at 1400°C for 2 hours, had good properties and a bending strength of 137.8MPa. Too high temperature or too long holding time made the properties of the material to decrease. β-SiC found by observing the microstructure is a major crystal phase in the synthesized ceramics, which would lead to fine mechanical properties.

Mechanical Properties of Carbon Nanofiber Reinforced Polylactic Acid

2007 ◽  
Vol 345-346 ◽  
pp. 1225-1228 ◽  
Author(s):  
Yoshinobu Shimamura ◽  
Atushi Yamamoku ◽  
Keiichiro Tohgo ◽  
Shigeru Tasaka ◽  
Hiroyasu Araki
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Bending Strength ◽  
Carbon Nanofiber ◽  
Weight Fraction ◽  
Three Point Bending ◽  
Fracture Surfaces ◽  
Pull Out ◽  
Twin Screw ◽  
Carbon Nanofiller

Carbon nanofiller reinforced PLA was fabricated, and the mechanical properties and heat resistivity were measured. Vapor grown carbon fiber (VGCF) produced by Showa Denko K.K. was used for reinforcement, which has 150 nm in diameter and 10 μm in length. No surface treatment of VGCF was conducted. VGCF and PLA were compounded by using a twin screw extrusion machine and then pelletized. The weight fraction of VGCF ranged from 1wt% to 10wt%. Three point bending specimens were fabricated by using injection molding. At first, three point bending tests were carried out at room temperature. The bending stiffness increased from 3GPa to as high as 5GPa, but the bending strength slightly decreased. SEM observation of the fracture surfaces indicated pull-out of VGCFs over the fracture surfaces. These results imply that adhesion between VGCF and matrix was imperfect. Then, the heat deflection temperatures and glass transition temperatures of the specimens were measured. The addition of VGCF did not increase the glass transition temperature but slightly increased the heat deflection temperature.

Water Absorption of Wood Composite Modified by Basalt Glass Powder

2013 ◽  
Vol 821-822 ◽  
pp. 1168-1170 ◽  
Author(s):  
Hua Wu Liu ◽  
Kai Fang Xie ◽  
Wei Wei Hu ◽  
Han Sun ◽  
Shu Wei Yang ◽  
...  
Keyword(s):  
Water Absorption ◽  
Glass Powder ◽  
Medium Density Fiberboard ◽  
Moisture Sorption ◽  
Wood Composite ◽  
Wood Composites ◽  
Thickness Swelling ◽  
Basalt Glass ◽  
Wood Sawdust ◽  
Dimensional Variation

Moisture sorption of wood sawdust panel results in dimensional variation, deterioration of mechanical property and fungi attack, which may be improved by the reinforcement of waterproof material. In this study, the fir sawdust panel was reinforced by basalt glass particles with size smaller than 5 micron, in order to reduce moisture penetration. When the content of basalt glass powder was 15%, both the thickness swelling and 24 h water absorption rate of wood composites reached their minimum values, which were 2.7% and 11%, respectively. The thickness swelling was far smaller than the 45% upper limit of medium density fiberboard as described by standards GB/T17657-1999.

scholarly journals THE EFFECT OF CADMIUM ON ALUMINUM COPPER MANGAN ALLOY

2010 ◽  
Vol 13 (1) ◽  
pp. 32-38
Author(s):  
Thong Duy Nguyen ◽  
Du Vinh Nguyen
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Phase Transformation ◽  
High Temperature ◽  
Aluminium Alloys ◽  
Temperature Conditions ◽  
Tempering Process

This paper presents the effect of Cadium in Aluminium alloys on mechanical property and phase transformation in the alloys. The Aluminium 4,8Cu 0,6Mn 0,2Ti alloys that contain between 0,150 and 0,288 Cadmium not only enhanced strength but also stabilized physical-mechanical properties. These characteristics are particularly shown on high temperature conditions. Although Cadmium does not participate in the resistance phases of the alloys, it still can maintain and dispose the vacancies in Al-Cu-Mn alloys after tempering. That's reason why Cadmium can control the precipitation of the resistance phase - CuAl2- in the tempering process.

Fabrication and Characterization of Porous TiB2 Ceramic with Three-Dimensional Interconnected Skeleton

2007 ◽  
Vol 336-338 ◽  
pp. 1076-1079
Author(s):  
Chang Qing Hong ◽  
Jie Cai Han ◽  
Xing Hong Zhang ◽  
He Xin Zhang
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Bending Strength ◽  
Three Dimensional ◽  
Pressureless Sintering ◽  
Neck Growth ◽  
Selective Heating ◽  
Fabrication And Characterization ◽  
Tib2 Particles

Porous TiB2 ceramics with a three-dimensional interconnected skeleton were fabricated by high temperature pressureless sintering from fine TiB2 powders. The microstructure of the porous TiB2 ceramic was characterized by the enhanced neck growth between the initially touching particles. This neck growth was ascribed to the selective heating of TiB2 particles with different dimension. The porous structure prepared by the high-temperature sintering exhibited higher bending strength and fracture toughness in the present experiment. The improved mechanical properties of the sintered composites were attributable to the enhanced neck growth by surface diffusion.

The Low Temperature Fracture of Asphalt Composite Reinforced by Basalt Glass Powder and Basalt Fiber

2012 ◽  
Vol 627 ◽  
pp. 816-818
Author(s):  
Jian Li Lou ◽  
Hua Wu Liu ◽  
Ai Yun Pang ◽  
Han Sun ◽  
Shu Wei Yang ◽  
...  
Keyword(s):  
Glass Powder ◽  
Bending Strength ◽  
Failure Strain ◽  
Basalt Fiber ◽  
Control Group ◽  
Rock Powder ◽  
Basalt Glass ◽  
Temperature Fracture ◽  
The Difference ◽  
Better Than

The bending strength and failure stain at -10 oC were used to evaluate the anti-facture properties of asphalt composite in winter. The samples with lime rock powder had the basalt fiber contents 0%, 0.2%, 0.25% and 0.3%, respectively. The bending strength and failure stain curves were convex and the maximum values reached at 0.25% basalt fiber content, which were 11.52MPa and 3450 ×10-6. The difference of bending strength between the maximum and the control group was 5.4%, which was insignificant. The difference of failure strain between the maximum and the control group was 13%, which was significant. The samples with basalt glass powder had the basalt fiber contents 0%, 0.2%, 0.25% and 0.3%, respectively. When the fiber contents were 0.2%, 0.25% and 0.3%, the increments of bending strengths in comparison with the control group were 7.6%, 12.4% and 10.8%, respectively. The difference of failure strain between the maximum and the control group was 8.8%, which was remarkable as well. The basalt glass powder is better than the traditional lime rock powder, as the filler of asphalt composite.

Synthesis of a Novel Ester-Based Drilling Fluid Applicable to High Temperature Conditions

2009 ◽  
Vol 131 (1) ◽  
Author(s):  
M. Nasiri ◽  
S. N. Ashrafizadeh ◽  
A. Ghalambor
Keyword(s):  
High Temperature ◽  
Drilling Fluid ◽  
Temperature Stability ◽  
Ester Hydrolysis ◽  
Favorable Effect ◽  
Drilling Fluids ◽  
Electrical Stability ◽  
Temperature Conditions ◽  
The Stability ◽  
Effect Of Hot Rolling

Ester-based drilling fluids based on aliphatic esters were introduced in 1990. Esters can be synthesized from fatty acids and alcohols. Previous studies indicated that ester hydrolysis in drilling fluids happens only under certain conditions. In order for ester hydrolysis to occur, two primary conditions must be present: high temperature and excessive hydroxyl. When the temperature exceeds 300°F, ester hydrolysis can occur under the presence of excessive hydroxyl. Hydrolysis breaks down the ester component into its parent carboxylic acid and alcohol. The current study shows that the stability of ester-based drilling fluids at high temperature conditions depends on the composition so that the selection of proper components and additives such as emulsifiers, stabilizers, copolymers, viscosifiers, and rheological modifiers can increase the temperature stability of the fluid. Hereby, the application of an ester-based drilling fluid is improved up to 350°F. The composition of the provided fluid is unique in the view point of its higher thermal stability against the previous formulations provided in literature. Furthermore, the experimental results of this study show the favorable effect of hot-rolling pressure on barite sag and electrical stability of the mud, i.e., increasing the pressure at three particular temperatures of 300°F, 325°F, and 350°F reduced the barite sag and at some instances increased the electrical stability.

Improving Mechanical Properties of Wood Composites Using Basalt Glass Powder and Basalt Fiber

2014 ◽  
Vol 1048 ◽  
pp. 400-403 ◽  
Author(s):  
Yan Fei Jiang ◽  
Hua Wu Liu ◽  
Tao Fang Jia
Keyword(s):  
Mechanical Properties ◽  
Glass Powder ◽  
Basalt Fiber ◽  
Composite Panel ◽  
Wood Composite ◽  
Wood Composites ◽  
Reinforcing Effect ◽  
Basalt Glass ◽  
Mass Ratios ◽  
Chopped Basalt Fiber

This study evidently indicated that basalt glass powder is not only far cheaper than chopped basalt fiber, but also has better reinforcing effect than basalt fiber in terms of key mechanical properties. Basalt glass powder and chopped basalt fiber were mixed with fir sawdust to produce wood composite panel, at the mass ratios of 0%, 5%, 10%, 15%, 20% and 25%. Compared with the unreinforced wood composite, the tensile and bending strengths of panels reinforced by basalt glass powder increased up to 94.3% and 43.3% respectively, when the powder contents were 15% and 10%; the ultimate increase of tensile and bending strengths were 50.8% and 34.4% respectively, when the content of chopped basalt fiber was 10%.

In Situ Combustion Synthesis of h-BN-SiC High-Temperature Ceramics

2007 ◽  
Vol 353-358 ◽  
pp. 1501-1504 ◽  
Author(s):  
Hong Bo Li ◽  
Yong Ting Zheng ◽  
Jie Cai Han
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Combustion Synthesis ◽  
Bending Strength ◽  
Silicon Powder ◽  
Nitrogen Pressure ◽  
In Situ Combustion ◽  
Reaction Thermodynamics ◽  
Adiabatic Combustion Temperature

The feasibility of fabricating h-BN-SiC high-temperature ceramics by in-situ combustion synthesis was demonstrated by igniting the mixture of boron carbide and silicon powder under 100MPa nitrogen pressure. The reaction thermodynamics and the adiabatic combustion temperature were calculated theoretically. The phase composition, microstructure and mechanical properties of composite were identified by XRD and SEM. The maximum bending strength and fracture toughness of the composite were 65.2 MPa and 1.4 MPa·m1/2 under room temperature, respectively. The effects of h-BN and SiC dilution contents on the mechanical properties of composite were also discussed.

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