Hua Wu Liu

Bending Performance of Basalt Fiber Reinforced Cement

Basalt fiber is highly active when react with cement, thus was used as a replacement of steel rebar to enhance the flexural performance of cement mortar. Basalt fiber and its grid fabric were used in this study. The resulting bending strength revealed that the bending strength of short fiber and grid fabric reinforced mortar were improved 29.4% and 49.03%, respectively. The bending strength of mortar reinforced by the combination of short fiber and grid fabric increased up to 59.57%, which is significant.

The High Temperature Stability of Asphalt Composite Reinforced by Basalt Glass Powder and Basalt Fiber

Wood fiber and lime rock powder have been used as the asphalt stabilizer and filler in highway construction. Basalt fiber and glass powder were adopted as the replacements of traditional stabilizer and filler. The experimental samples were made by tyre rubber powder modified asphalt mixture, basalt fiber, lime stone powder and basalt glass powder. The dynamic stability of the samples at 60 oC was indexed by the runs of automobile tracking. The samples with lime rock powder had the basalt fiber contents 0%, 0.2%, 0.25% and 0.3%, respectively. The corresponding dynamic stabilities were 4500 run/mm, 5300run/mm, >6000 run/mm and 5400run/mm. The samples with basalt glass powder had the basalt fiber contents 0%, 0.2% and 0.25%, respectively. The dynamic stability went above the upper limit of the tester when the basalt fiber content was 0.2%. The control group of basalt glass powder modified sample had 5600run/mm, whereas the control group of lime rock modified sample was 4500run/mm, of which the increment was 24%. We may conclude that the effect of basalt fiber reinforcement was significant. In addition, the basalt glass powder is better than lime rock powder, as the filler of asphalt composite.

Surface Treatment of Chopped Basalt Fibers and Mechanical Properties of Wood-Based Composite

Chopped basalt fiber reinforced wood sawdust panels were glued using melamine modified urea-formaldehyde resin. In order to improve the interfacial property, the basalt fibers was pre-treated by silane coupling agent. The tensile and bending strengths of the wood composites were tested, which indicated that the tensile and bending strengths of wood composites both reached their maximum values, 17.359MPa and 37.331MPa respectively, when the concentration of silane coupling agent is 0.75%.

Factors Affecting Thermal and Moisture Comfort of Bamboo Fabric

The fluid permeability and thermal conductivity of bamboo, cotton and ramie fabrics were measured and analyzed using variance analysis and principal component analysis. After the evaluation of the heat and mass transfer properties of these fabrics, it was found that the bamboo fabric owns the best thermal and moisture performance, in terms of wearing comfort.

Flame Retardation of Plain Weave Fabrics Made of Polyacrylonitrile Pre-Oxidized Yarns

Plain weave fabrics of polyacrylonitrile pre-oxidation yarns (PANOF) were prepared by small rapier loom. The flame retardation properties, mechanical properties and wear behaviors of PANOF plain weave fabrics were tested. The limiting oxygen index (LOI) of these PANOF plain weave fabric samples was 31%, which meets the criterion of flame-retardant fabrics. These fabrics neither melt nor shrunk when left in flame for a short period of time and the fabric structures were well maintained. Compared with flammable polyacrylonitrile fabrics, the polyacrylonitrile pre-oxidation fabrics exhibited excellent flame retardation properties, with satisfactory mechanical properties and comfortable handle.

The Research of Multi-Layer Biaxial Weft Knitted Fabric Reinforced Composite Materials

Multi-layered biaxial weft knitted fabrics has excellent mechanical properties and formability. The performances of multi-layered biaxial weft knitted fabrics were compared with multi-axial warp knitted fabrics and plain weave fabrics to highlight the advantages of this novel fibrous assembly. The manufacturing method and applications of the developed novel fabrics were illustrated in details.

Structure Structural Characteristics of Rabbit Hair

Key morphological features of rabbit hair were investigated and compared with these of cashmere fiber. When the rabbit fiber diameter was about 10um, the angle of scale edge to the fiber axis was small. When the fiber diameter was around 40um, scale edges inclined larger angles to the axis. In addition, no overlapping and checks along the scale edges were observed in such coarse hair. The rabbit fiber diameters were normally between 10um and 20um and the scales of these fibers were long strip shaped with sharp tip at the middle. There was obvious boundary in the cashmere fiber after dyeing. One side is far darker than the other. On the contrast, this bilateral structure was not observed in the rabbit hair samples. The cortical cells presented in an uneven distribution in the rabbit hair. The mean ratio of medulla (filled with plenty of air) to fiber diameter was about 40%, which provide excellent thermal insulation to the rabbit hair assemblies.

The Advantages of Basalt Glass Flake Coating for Marine Anticorrosion

Harsh marine environment makes anticorrosion to be a technical challenge of ocean engineering. Glass flake, as the pigment for under seawater coating, is required by anticorrosion standard and has been the bottleneck of Chinese marine technology. Basalt planar glass flake is novel anticorrosive pigment developed by the authors, which is environmentally friendly, strong, heavy-duty anticorrosion, water impermeable, anti-weather and UV blocking and superior to the traditional c-glass flake and basalt glass-ceramic flake. Epoxy resin has excellent properties of film forming, corrosion resistance, low permeability, high adhesion and dimensional stable. Hence, basalt glass flake reinforced epoxy resin coating has significant advantages in the marine engineering, in terms of anticorrosion.

The Research and Development of Continuous Basalt Fiber /Polyester Woven Filter Cloth

Filter made by polyester woven fabric may deform in service, which may be improved by interweaving polyester and continuous basalt fiber filaments. The dimensional stabilities of polyester woven filter and continuous basalt fiber/polyester woven filter were observed under the conditions of dry heating at high temperature and hot dilute alkali environment. It was found that the continuous basalt fiber was helpful to improve the dimension stability of the woven filter fabrics in different concentrations of hot dilute alkali.

The Mechanical Properties of Bamboo/PLA Composites Made by Biaxial Weft Knitted Fabrics

Bamboo fiber reinforced polylactic acid composite is a kind of green composite materials with excellent performance, which is environmental safe and degradable in natural environment. Literature regarding the characteristics of reinforcement and matrix, pretreatment methods, preparation technology and biodegradable nature of the bamboo/ polylactic acid composite was reviewed and a particular bamoo/ polylactic acid composite made by biaxial weft knitted fabrics was developed. The composite demonstrated excellent tensile and flexural performance. In addition, the influence of the linear density of the binder yarns on the mechanical properties of this composite was insignificant.