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Copyright of New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Low-Carbon Chemistry & Chemical Engineering is the property of Low-Carbon Chemistry & Chemical Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Red soil is one of the typical soil types in China, which is widely distributed in 17 provinces with a total area of 569,000 km², accounting for about 1/5 of the total land area in China. It is a widely distributed soil type in Yunnan Province. Compared with other natural soils, red soil has high viscosity, high water content, low shear strength, serious loss of organic matter and nutrients, and changes in soil structure and quality, which leads to low root characteristic parameters of root-soil complex and cannot meet the needs of engineering practice. However, the roots of herbaceous plants are mostly dense and fine roots, which have a good reinforcement effect on shallow soil, consolidate soil and prevent erosion, and their root characteristic parameters can better reflect the contribution of roots to soil shear strength. It is of certain significance to study the mechanical properties of root-soil complex of herbs through root characteristic parameters. In order to find out the influence mechanism of root characteristics on the shear characteristics of herb root-soil complex under different mass fractions (0, 0.5%, 2.5% and 5.0%) of wood fiber reconstruction red soil, the shear strength of root-soil complex of white clover and ryegrass was measured by direct shear test, and four root characteristic parameters, such as root surface area index, root volume ratio, root length and underground biomass, were measured by WinRHIZO root analysis system, and their resistance was further revealed. The results showed that proper wood fiber addition was beneficial to the growth of fibrous root herbs. When the wood fiber content is high, the root length of Lolium perenne and white clover are 456.27 and 438.35 cm respectively, and the underground biomass are 0.410 and 0.150 mg respectively. With the increase of root characteristic parameters, the shear strength of ryegrass root-soil composite is greater than that of white clover root-soil composite, and the shear strength of both is better than that of single wood fiber composite soil or root soil, with the increase ranges of 26.55% - 47.20% and 26.21% - 35.07% respectively, but there is a certain change threshold. The Mohr-Coulomb model is used to simulate the shear characteristic parameters of the root-soil complex. When the characteristic parameters of root system reach the change threshold, the change of cohesion is obviously and plays a leading role, but has little influence on internal friction angle. The shear strength of root-soil complex increases first and then decreases. When the root parameter value exceeds the threshold, the shear strength of wood fiber rootsoil composite decreases, showing a trend of increasing first and then decreasing. This study has important theoretical and engineering practice value for further study of slope protection, vegetation restoration and land consolidation in red soil region. [ABSTRACT FROM AUTHOR]

The formula, influencing factors and performance evaluation of composite putty for filling gaps in plywood based on wood fiber particle size/wood powder type difference were explored, and the technology development of filling gaps and flatness control on plywood surface was devoted. The effects of temperature, wood flour type and wood fiber mesh on the performance of putty were discussed by single factor condition. The results showed that the wear resistance, dry strength, wet strength, compatibility and stability of putty filling materials with wood fiber improved significantly compared with those without wood fiber, except that the surface drying time was slightly higher than that of the control group. Under the condition of the same number of wood fibers, different types of wood fibers will also affect the properties of putty. The order of wet strength and roughness was eucalyptus powder, poplar powder, miscellaneous wood powder, pine powder and bamboo powder. The order of dry strength was eucalyptus powder, miscellaneous wood powder, poplar powder, pine powder and bamboo powder. The order of wear resistance was poplar powder, pine powder, miscellaneous wood powder, eucalyptus powder and bamboo powder. The types of wood fibers have no significant effect on the surface drying time, compatibility and stability of putty. [ABSTRACT FROM AUTHOR]

Copyright of New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Red soil is one of the most widely distributed soil types in Yunnan Province of China. Red soil is characterized by high plasticity, high void ratio, heavy viscosity, slightly acidic soil, as well as low water and fertility retention. Among them, alternate wetting and drying can be caused by rainfall, irrigation, high-temperature evaporation, and disturbances in production and construction projects, leading to the shrinkage, cracking, and swelling of red soil during drought. Soil water characteristics change dramatically, which is essential to carry out soil improvement in red soil regions. Soil reconstruction has been widely used in the practice of red soil improvement. Most research focuses mainly on the hydraulic properties of the natural red soil, rather than the reconstructed one. Furthermore, the wood fiber can be expected to serve as an ecological soil conditioner, in order to improve the ecological restoration, of the soil, and water conservation in the mining areas. However, it is still lacking on the effects of wood fiber additions on the physical properties of red soil in the combination of dry and wet alternation and wood fiber. In this study, a novel mechanism was proposed to clarify the impact of wood fiber reconstruction on the hydraulic properties of red soil during dry and wet alternation. The red soil was collected in Kunming City of Yunnan Province in China. Four types of wood fiber additions (0, 0.5%, 2.5%, and 5.0%) were used to improve the red soil. The matric suction of wood fiber composite soil was measured using filtering, and the soil-water characteristic curve (SWCC) was fitted using the Logistic model. The results showed that there was a gradually slow hysteresis in the dry-wet alternation on the decrease in the soil matric suction and SWCC of red soil, as the addition of wood fiber increased. Specifically, 2.5% wood fiber composite soil was the optimal ratio to improve soil water holding. The addition of wood fiber increased the intake and residual value of red soil. The residual value changed greatly under dry and wet alternations, whereas, there was a gradual decrease in the residual value, as the number of dry and wet alternations increased. The slope of 2.5% wood fiber composite soil was less affected by the dry and wet alternations, with the best capacity of water holding, while the volumetric water content decreased. The determination coefficients of soil-water characteristic curves were all above 0.97 after wood fiber addition, indicating that the Logistic model was suitable for the SWCC fitting of red soil that was modified with the wood fiber. The finding can provide a strong reference for soil reconstruction and ecological restoration during land consolidation in the red soil regions. A series of experiments were also carried out to determine the different amounts of wood fiber during dry and wet alternation. The relationship was also established between the impact of wood fiber improvement on the hydraulic properties of red soil. Since the specific impact can be depended on the physical indicators of the soil mass, further research can be expected to focus on the soil pore structure, aggregates, and permeability in the red soil. [ABSTRACT FROM AUTHOR]

Copyright of Biomass Chemical Engineering is the property of Editorial Office of Biomass Chemical Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To rapidly acquire fiber phenotypic data for wood quality assessment, we used a portable NIR spectro-meter to collect spectral data in 100 individuals of Schima superba at 18-year-old of 20 different provenances, and simultaneously collected wood cores. Wood basic density and the anatomical structure of wood fiber were measured. The standard normal variate (SNV), orthogonal signal correction (OSC), and multiplicative scatter correction (MSC) methods were used for spectral preprocessing, the competitive adaptive reweighted sampling (CARS) method were used for wavelength selection, and the partial least squares regression (PLSR) model were established. The results showed a significant difference for the absolute reflectance data between forest and indoor environments, and the spectral data of which were relatively independent. SNV, OSC and MSC showed significant differences for predictive performance of the model. OSC had the excellent preprocessing capability in multiple cha-racteristics of wood fiber ether in forest and indoor environments. The predictive accuracy of the models with R 2 was 0.47-0.78 in forest (average=0.63), and R =0.58 and 0.72, respectively). When performed OSC before and after CARS, the predictive accuracy of the models was improved to 0.68 and 0.84 respectively using forest and indoor data. The OSC and CARS could significantly improve the accuracy of the models for wood fiber anatomical structures. First OSC, then CARS, and finally OSC methods could be used to establish the PLSR model for fiber length, fiber cell wall thickness, fiber lumen diameter, wood basic density, fiber cavity-width ratio, and fiber wall-cavity ratio, and the 2 was 0.54-0.82 in indoor environment (average=0.71). However, the SNV and MSC methods could not establish the models, except the fiber wall-cavity ratio from forest data. After wavelength selection through the CARS method, the predictive accuracy of the models was significantly improved using both forest and indoor data ( R 2 =0.58 and 0.72, respectively). When performed OSC before and after CARS, the predictive accuracy of the models was improved to 0.68 and 0.84 respectively using forest and indoor data. The OSC and CARS could significantly improve the accuracy of the models for wood fiber anatomical structures. First OSC, then CARS, and finally OSC methods could be used to establish the PLSR model for fiber length, fiber cell wall thickness, fiber lumen diameter, wood basic density, fiber cavity-width ratio, and fiber wall-cavity ratio, and the R 2 ranged from 0.80 to 0.95. These models had effective predictive ability and accuracy to assess the physical properties of wood fibers of S. superba .

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The effects of silica fume, cellulose ether and wood fiber on water consumption sensitivity and mechanical properties of cement-based grouting materials were analyzed through experiments. Three kinds of materials are used in combination to give full play to their advantages, make up for their shortcomings and achieve the best results. When the dosage of silica fume is 6%, cellulose ether is 0.005%, wood fiber is 0.05%, the water sensitivity of cement-based grouting material is obviously improved. Under the condition of high water consumption, the aggregate distribution in the section of cement-based grouting material specimen isuniform and there is no stratified bleeding. [ABSTRACT FROM AUTHOR]

Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Jianzhu Cailiao Xuebao: Journal of Building Materials is the property of Journal of Building Materials and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Principle and influence factor of smooth and cleaning spinning technology are introduced. Smooth and cleaning spinning technology about 18 tex cotton/wood fiber/cashmere/spun silk dyed yarn is detailed analyzed from several aspects, such as performance of raw material, spinning process, technology points and so on. Drawing process is carried out with cotton and spun silk sliver, wood fiber sliver and cashmere sliver. The main influencing factors of yarn quality by smooth and cleaning spinning technology is analyzed. Performance testing about spun yarn indicated that hairiness and evenness was improved. The developed yarn is soft and comfortable, and has antibacterial and self-cleaning properties. It can be used to develop high added value and functional fabric. [ABSTRACT FROM AUTHOR]

Copyright of Jianzhu Cailiao Xuebao: Journal of Building Materials is the property of Journal of Building Materials and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)