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Copyright of Industria Textila is the property of Institutul National de Cercetare-Dezvoltare pentru Textile si Pielarie 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.)

Using cement with fibers is a cost-effective way to improve soft clays' engineering properties. This study investigates the strength, stiffness, and durability of artificially cemented alluvial clay stabilized with glass fiber. Unconfined compressive strength and shear wave velocity tests were used, along with microstructural analysis via scanning electron microscopy and energy-dispersive spectroscopy. Durability and resistance to harsh weather were evaluated using wet-dry cycles. The combination of cement and glass fiber improved the mechanical response, with 0.4% glass fiber being the most effective. A blend of 0.4% glass fiber with 13% cement showed the highest strength and stiffness improvement and reduced mass loss. This mixture, supported by unique power functions forecasting its properties, is suitable for various civil engineering projects, such as unbounded sub-layers, highway barriers, stone columns, and ground improvement. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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 focus of this research work is to study the effect of hybrid fillers of bamboo fiber and commercial glass fiber on high density polyethylene (HDPE) matrix without interfacial coupling agent. The hybrid composite was formed through melt blending method using two-roll mixing mill at temperature of 160 oC and was shaped using compression molding machine. The highest value of Tensile Modulus at break and Hardness were obtained at hybrid ratio of 70 % of HDPE/15 % bamboo/15 % glass particles (H/B15/G15). However, the inclusion of the hybrid fillers did not show any significant difference in Impact strength from the molded blank HDPE samples (H/B0/G0) while the percentage water absorbed by the samples predominantly decreased as the content of the commercial glass filler was increase in the HDPE matrix. [ABSTRACT FROM AUTHOR]

Composites from two different sets of biaxial (flat and tubular) and triaxial (tubular) braided glass fabric reinforcements were produced using epoxy resin through compression moulding technique and tested for breaking load, Young's modulus and impact strength. After carrying out statistical significance tests, both the sets of composites were analysed. It is found that the composites produced using braided flat or tubular-cut fabrics as reinforcements have lower mechanical properties compared to those produced from uncut reinforcements. Introducing the axial yarn in biaxial tubular fabric to produce triaxial tubular fabric and used in cut form to produce composite results in improving the mechanical properties of the product considerably. [ABSTRACT FROM AUTHOR]

This paper presents the conservation treatment of original 1960s polyester design elements in the Düsseldorf Schauspielhaus, which was performed as an integral part of a major restoration of the landmark building. It is shown how the structural and usage-related context of the design influenced the decision-making process that led to the conservation treatment. This was relevant both for the choice of conservation materials and methods and for the integration of the conservation measures within the larger restoration project. To contribute to decision-making, the works of art were examined with regard to their production process, their installation within the building, their condition and their future use. [ABSTRACT FROM AUTHOR]

This work examined the enhancement of bending strength properties of two wood species, namely fir and pine, reinforced with two carbon fibre fabrics (CFF) of different areal weight, in two different layouts. CFF applied in the bottom surfaces of the specimens ('F'-type) and in the second wrapped in the bottom surfaces and up to the half of the lateral surfaces ('U'-type).The results indicated that samples which are reinforced with CCF show higher MOR and MOE values than the controls and this improvement was found to be significantly different. The reinforcement layout affected the bending properties of both pine and fir wood, since the corresponding values are higher in U-shaped reinforcement than in F-type reinforcement, at identical CFF areal weights. In the case of fir wood, the CFF areal weight did not significantly affect the bending properties. [ABSTRACT FROM AUTHOR]

Triaxial compression tests were conducted to investigate the response to loading of glass fibre-reinforced sandy soil of varying relative densities (35, 65 and 85%). The fibre diameter was 0.15 mm, varying in length from 10 to 30 mm, and in content from 0 to 4% by weight of dry soil. The tests were performed at confining pressures ranging from 100 to 400 kPa. The separate and joint effects of fibre content, fibre length and confining pressure on the strength and deformation characteristics of the specimens were evaluated. The strength of specimens increases up to an optimum fibre content value of 3 or 4% depending on length. Fibre reinforcement has restricted the bulging and shear zones for specimens of all relative densities. A non-linear regression model has been developed for predicting the shear strength of reinforced soil, and scaling law has been employed for using the laboratory results for field application. [ABSTRACT FROM AUTHOR]

The present work deals with the investigations on the joint efficiency and the joint stiffness of the single lap bolt joint made of two dimensional woven glass fibre reinforced composite materials. The effect of joint geometry, bolt pretension and washer has been determined on the bolt joint performance. To estimate the effect of geometric parameters; the edge-to-hole diameter (e/d) and width-to-hole diameter (w/d) ratios are varied from 3 to 4 and 3 to 5, respectively. To study the worst loading conditions; the bolt pre-tension is set to zero, whereas 5 Nm torque is applied to investigate the joint in fully clamped conditions. Two different sizes of washer i.e., the outer diameter of 12 mm and 16 mm have been studied to estimate the effect of the washer on failure load, joint stiffness, and joint efficiency. Progressive damage analysis has been performed on the single lap bolt joint. Characteristic curve method along with Tsai-Wu failure criteria has been used for the prediction of the failure loads and failure modes. The joint stiffness and the failure load of the joint are increased with the increase of w/d ratios. However, the joint efficiency was negatively influenced by w/d ratio. [ABSTRACT FROM AUTHOR]

The rapid utilization of carbon fibre reinforced composite (CFRC) and glass fibre reinforced composite (GFRC) in main sectors, such as automobile, aerospace, wind turbines, boats and sport parts, has gained much attention because of its high strength, light weight and impressive mechanical properties. Currently, the increasing amount and handling of composite waste at their end-of-life (EoL) has a negative impact on resources conservation and the environment. Pyrolysis, a two-step process, appeared as most viable process to recover not only valuable materials but also produce fuel and chemicals. However, the testing facilities and optimized operation of composite waste in pyrolysis processes to produce materials with low energy consumption and acceptable mechanical properties are still under development and discussion before commercialization. The aim of this article is to review the studies on CFRC/GFRC recycling via pyrolysis processes and highlight their technical challenges and re-use possibilities in high performance composites. The forthcoming commercialization challenges and respective market potential to recyclates using the pyrolysis process will be addressed. This study will also introduce the strong connection between recycling and re-usability of fibres which would help to explain the concept of circular economy and cradle-to-cradle approach. Finally, based on updated studies and critical analysis, research gaps in the recycling treatments of fibrous composite waste using pyrolysis processes are discussed with recommendations. [ABSTRACT FROM AUTHOR]

Copyright of Material Science & Applied Chemistry is the property of RTU Publishing House 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.)

In the absence of impermeable natural soils, compacted sand–bentonite mixture along with a layer of geosynthetic clay liner (GCL) is used as a liner material at the waste disposal site. However, due to desiccation, the bentonite present in the liner shrinks resulting in an increase in the hydraulic conductivity of the liner. To prevent the desiccation cracking of bentonite, glass fibre is added to the mixture as a reinforcing material. However, the addition of the fibre can influence the geotechnical properties of liner material. To study the effect of the fibre on the geotechnical properties of the sand–bentonite mixtures with one layer of GCL, glass fibre of 10 mm length was added in the proportion of 0.5 and 1.0% to different sand–bentonite mixtures. Result shows that the swelling pressure and swelling potential of the soil–bentonite mixture with a layer of GCL decreased significantly with the increase in the glass fibre content in the mixture. The hydraulic conductivity of the mixtures was decreased with the inclusion of the GCL to mixtures; however, it increased considerably when glass fibre was added to the mixture. The compression index of the mixtures with GCL decreased marginally due to the inclusion of fibre. [ABSTRACT FROM PUBLISHER]

Ankle-foot orthotics need ideal specification of being light-weight, high strength, tough, stiff, and durable. Reinforced polypropylene (PP) composites with enhanced mechanical properties are the most favorable materials being used in this field, but still, it is challenging to achieve balanced blend of strength and toughness in the composites. The present study thus aims to achieve the challenging task of simultaneous improvement in stiffness and toughness in reinforced PP composites exploring the synergistic reinforcement effect of glass fibers (GFs) and nano silica (SiO2) as multiscale fillers and ethylene propylene diene monomer (EPDM) as impact modifier. EPDM is used as toughness modifier, addressing the brittle behavior, but at the cost of the strength of the polymer. Combined use of micro and nanofillers as reinforcement in toughened polypropylene provides a potential approach to balance the strength while maintaining the toughness. GFs could offer high strength and nanofillers offer ductile fracture to the material. PP, PP/GF, PP/EPDM/GF composites and PP/EPDM/GF/SiO2 nanocomposites are fabricated through melt blending technique and are characterized through SEM, mechanical evaluation, nanoindentation and dynamic mechanical analysis. Mechanical properties are evaluated in accordance with ASTM standards. PP/EPDM/GF/SiO2 nanocomposites exhibits remarkable enhancement in Tensile strength, tensile modulus, impact strength and percent elongation at break by 49 MPa (55% increase over PP), 2450 MPa (145% increase), 145 J/m (13% increase) and 156% (160% increase) respectively. The exceptional improvement in reduced modulus and hardness reveals good interfacial properties. Loss factor decrement reveals elastic behavior of nanocomposites suitable for thermoforming of nanocomposites for orthotic device fabrication. [Display omitted] • Durable, strong, low-cost PP/EPDM/GF/SiO 2 nanocomposites for orthotic applications. • Incorporation of EPDM, Glass fibers and silica nanoparticles in PP nanocomposites for balanced strength and toughness. • Increased storage modulus and decrement in loss factor provides required elastic behavior for orthotic application. • PP/EPDM/GF/SiO 2 nanocomposites exhibits 55% increase in tensile strength, 145% increase in tensile modulus, 13% increase in impact strength, 160% increase in % elongation at break, 207% increase in elastic modulus, and 963% increase in hardness over neat PP. [ABSTRACT FROM AUTHOR]

Hardened properties of normal concrete (NC) and self-compacting concrete (SCC) are compared. Also, the influence of glass fibres on fresh and hardened properties of SCC is investigated. Three concrete mixtures; normal concrete (NC), SCC and SCC with glass fibres were prepared with a water-cement ratio of 0.35. It was found that addition of glass fibres slightly reduced the workability properties of SCC. Compressive strength and splitting tensile strength of SCC were found to be slightly higher than NC. However, modulus of rupture and modulus of elasticity of SCC was found to be lower than NC. Addition of glass fibres in SCC had limited effect on compressive strength and modulus of elasticity but increased modulus of rupture and splitting tensile strength significantly. [ABSTRACT FROM AUTHOR]

The use of polymer fibre reinforced Composite materials is finding applications day by day in engineering fields such as aero-space, automotive, aircrafts constructions, etc. Glass fibre polymer composites are reinforced with granulated blast furnace slag (GBFS) ball milled to size of 5 nm in different weight fractions, i.e. (0%, 5%, 10% and 15%) and fabricated by using hand lay-up technique. These fabricated slabs are cut into required dimensions and the tests for mechanical properties like Tension test, Compression test, Flexural test Impact test and Hardness test were performed. Tension test, compression test and Flexural test were performed on Computerized Universal Testing Machine (UTM), Impact test was performed for Izod and Charpy specimens and Hardness test was performed on Brinell's Hardness Testing Machine. From the experimental results obtained, it was noticed that the mechanical properties were enhanced when the blast furnace slag percent was increased and also among these percentages of blast furnace slag, the specimen having 15% was possessing highest properties. [ABSTRACT FROM AUTHOR]

Copyright of Medicina y Seguridad del Trabajo is the property of Escuela Nacional de Medicina del Trabajo - Instituto de Salud Carlos III 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 present paper reports some of the important application of textile materials in earthquake resistance constructions. ln earthquake resistant design it is important to ensure ductility in the structure, i.e. the structure should be able to deform without causing failure and the use of textile in earthquake resistant design will give better ductility in the structure. [ABSTRACT FROM AUTHOR]

Copyright of Polimery is the property of Industrial Chemistry Research Institute 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.)

Due to their specific properties composite materials are being used in a variety of structures. Modern underwater vehicles are a good example: they are light, sturdy and corrosion resistant. Demands posed on such a structures are good sailing properties, good maneuverability and the ability to withstand designed pressure. Nonlinear finite element method (NFEM) is a sophisticated engineering tool that may be used to estimate limitations in the composite-made submersible design. However, the application of the method is not always straightforward. Commercially available NFEM software provides a number of material models but their application is limited by the available material properties. In addition, numerical problems may occur and both material model and numerical model must be verified against instabilities. A particular submersible is being modeled and subjected to NFEM analysis. The overview of commercial software material models is given and their application in structural analysis of a submersible is evaluated. Comparison is made between different structural materials in order to check the submersible maximum diving depth. Numerical problems are commented, different material solutions compared and structure enhancements proposed. [ABSTRACT FROM AUTHOR]

Copyright of Polimery is the property of Industrial Chemistry Research Institute 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.)

Abstract: The new optimization methods of outer layer fibre directions and concentrations of plywood plate with glass fibre-epoxy outer layers are proposed. The first method minimizes structural compliance. It consists of two phases. The fibre directions are optimized in the first phase and concentrations in the second phase. The second method maximizes buckling load for the first buckling mode. The increase of stiffness is about 31% of plate with optimized fibre direction and concentration comparing to similar non-optimized plate. The buckling load of single span rectangular plate could be increased about 34% when optimized GFRP-plywood plate by proposed method. [Copyright &y& Elsevier]

Abstract: Using textile composites with straight fibre orientation in-plane, improved lightweight structures can be designed and produced, where the fibres are specifically positioned in line with the flux of force induced by external loads. Here, the structural properties are dominated by the material properties of the 0°-fibres under static as well as under fatigue loading. It is well known, the failure behaviour in fibre direction is affected by textile loop threads and adjacent plies, for example by notch effects of inter fibre cracks. For the experimental characterisation of the influence of 3D-loop threads as well as adjacent plies on the fatigue performance, the degradation behaviour of unidirectional and textile glass fibre reinforced polypropylene in tension-tension fatigue loading has been analysed. The material configurations have selectively been chosen to achieve identical fibre volume fraction of the reinforcement fibres in loading direction and therefore gain a high comparability in fatigue loading. The driving damage mechanisms are observed using imaging methods, such as light microscopy and computer tomography. The achieved experimental results will be incorporated into the failure mode dependent fatigue analysis models already been published by the authors. [Copyright &y& Elsevier]

Two types of commingling nozzles have been used to study the air flow behaviour inside the nozzle and their effects on commingling performance of glass/nylon yarns. The air flow behaviour has been analysed with computational fluid dynamics software FLUENT 6.1 and actual air flow velocities are calculated using measured air pressure. It is observed that there is a good correlation between the simulation and the measured air flow pattern. The air flow pattern in the Nozzle-1 configuration shows more turbulent zones than that in Nozzle-2. The commingled yarn properties also clearly indicate that the effectiveness of commingling is much better with Nozzle-1 configuration than that with Nozzle-2 configuration. [ABSTRACT FROM AUTHOR]

The unidirectional thermoplastic commingled yam composites have been fabricated from three different varieties of yams in a hot press and then studied for the bending properties on DCS-500 tester using three-point loading system. It is observed that the bending properties of composites, especially the transverse bending properties, are affected by the mixing degree of reinforcing fibre/matrix fibres and bulkiness of reinforcing fibres bundle. [ABSTRACT FROM AUTHOR]

This article briefly described the formation, structure design and performance of warp-knitted mesh fabric. Based on the projects the author has undertaken, he explained application of warp-knitted mesh fabric in high-tech textiles. Taking the development of warp-knitted mesh fabric as examples, the author expounded the main points of technology innovation for warp-knitting industry. [ABSTRACT FROM AUTHOR]