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Tumadhir Merawi Borhan - One of the best experts on this subject based on the ideXlab platform.
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modelling Basalt Fibre reinforced glass concrete slabs at ambient and elevated temperatures
Materials and Structures, 2014Co-Authors: Tumadhir Merawi Borhan, Colin BaileyAbstract:The analysis of tests conducted on small-scale slabs at ambient and elevated temperatures is presented in this paper. The slabs were produced from a new type of concrete containing different levels of glass sand and Basalt Fibre. Two methods were used for this purpose: a simplified method developed previously and a finite element method, using the software package ABAQUS. For the slabs at ambient temperature, the results showed a good correlation for the load–displacement relationship between the test and the two models up to the failure loads. For the slabs at elevated temperature, the ABAQUS model gave a reasonable prediction for the temperature–displacement relationship while the simplified method gave a conservative prediction for the maximum allowable vertical displacement. As a result, the simplified method underestimated the temperature at which the reinforcement fracture occurs for this type of concrete slab, incorporating glass sand and Basalt Fibres. Further work is required to remove this conservatism from the simplified design method for this type of concrete.
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structural behaviour of Basalt Fibre reinforced glass concrete slabs
Materials and Structures, 2014Co-Authors: Tumadhir Merawi Borhan, Colin BaileyAbstract:Small-scale slab tests at ambient and elevated temperatures, conducted on horizontally unrestrained simply supported slabs, are presented in this paper. The aim of this research is to investigate the structural behaviour of concrete produced from different percentages of glass sand (20, 40, and 60 % by weight) and reinforced with different volume fractions of Basalt Fibre (0, 0.1, 0.3, and 0.5 % by total mix volume), when subjected to large vertical displacement. The results were also compared against similar structural members with concrete that did not contain glass or Fibres. The results showed that the fracture of the reinforcement was the mode of failure for all the slabs and the load carrying capacity was enhanced above the theoretical yield-line load. For the slabs tested at elevated temperatures, the enhancement due to membrane action was at least twice as high as that recorded in the ambient temperature tests. The slabs with higher glass sand and Basalt Fibre content also exhibited greater enhancement and failed at higher displacement. The results also showed that the enhancement in the concrete with glass aggregate and Basalt Fibre was greater than that in concrete that contained no glass or Fibre by up to 26 and 31 % at ambient temperature and in fire respectively.
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properties of glass concrete reinforced with short Basalt Fibre
Materials & Design, 2012Co-Authors: Tumadhir Merawi BorhanAbstract:Abstract Experimental work was carried out to develop information about the properties of glass aggregate concrete reinforced with chopped Basalt Fibre. Recycled waste mixed colour glass was used as a partial replacement (20%, 40%, and 60% by weight) for the natural fine aggregate with different volume fractions of Fibre (0%, 0.1%, 0.3%, and 0.5% by total mix volume). The combined effect of the glass and the Basalt Fibre on the mechanical properties of the fresh and hardened concrete was investigated. The heat transfer through the thickness for this type of concrete was also investigated. A statistical analysis was also carried out to investigate the variance of the data for each mix. The test results and the statistical analysis indicated that there is a slight reduction in the compressive and splitting tensile strength with the increase in the glass content above 20%. Using Basalt Fibre leads to an enhancement in it for all mixes and there is an optimum content of Fibre in each percentage of glass sand which gives higher strength. A slight decrease in the heat transfer through the concrete specimens was also observed.
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Thermal and structural behaviour of Basalt Fibre reinforced glass concrete
2011Co-Authors: Tumadhir Merawi BorhanAbstract:This study aims to produce a type of concrete with both good thermal and mechanical properties by using environmentally friendly and low cost materials. In addition, the resistance of this concrete to fire conditions was investigated. The experimental work comprises two parts. In the first part, recycled glass was used as a partial replacement for natural sand (at proportions 20%, 40% and 60%) together with Basalt Fibre having different volume fractions (0.1%, 0.3%, and 0.5%). The results obtained from the experimental work showed that the optimum content is 20% glass and at 28 days, there was a 4.23% and 15% enhancement in the compressive strength and the splitting tensile strength respectively. Above 20% glass there was a slight reduction (6.6% and 22%) in the compressive strength and the splitting tensile strength when 60% glass was used. The results also showed that when glass sand and Basalt Fibre content increase, there is a decrease in the thermal conductivity range from 4.35% to 50% at temperature levels between 60oC to 600oC. The structural behaviour of this type of concrete was investigated in the second part of this study by carrying out small-scale slab tests at ambient and elevated temperatures. The results show that there is an increase in the load carrying capacity above the theoretical yield line load, due to membrane action, for all percentages of glass and volume fractions of Basalt Fibre ranging from 1.35 to 1.68 for the slab tested at ambient temperature and from 3.13 to 3.26 for the slabs tested at elevated temperature. Also the slabs with higher glass sand and Basalt Fibre content had a higher load enhancement and failed at a higher displacement compared to the control mix.A comparison between the simplified method and the finite element software package ABAQUS showed that the ABAQUS model gives reasonable predictions for the load?vertical displacement and the temperature?displacement relationships at both ambient and elevated temperature conditions, while the simplified method gives conservative predictions for the maximum allowable vertical displacement for the slab at elevated temperature. A parametric study showed that a 10 mm cover depth is the optimum depth as well as the reinforcement temperature predicted reduced with increasing load ratio (applied load/yield line load).
Raymond Gilfillan - One of the best experts on this subject based on the ideXlab platform.
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Pull-out behaviour of axially loaded Basalt Fibre Reinforced Polymer (BFRP) rods bonded perpendicular to the grain of glulam elements
Construction and Building Materials, 2013Co-Authors: David Yeboah, Danny Mcpolin, Su Taylor, Raymond GilfillanAbstract:The behaviour of Basalt Fibre Reinforced Polymer (BFRP) loaded perpendicular to glulam timber elements was investigated. It was found that pull-out load increased approximately linearly with the bonded length up to maximum which occurred at a bonded length of 250 mm (∼15 times the hole diameter) and did not increase beyond this bonded length. Failure mode of the samples was mostly shear fracture which was located at the cylindrical zone at the timber/adhesive interface. Increased bonded lengths resulted in corresponding decrease in interfacial bond stress. At 250 mm bonded length, the pull-out capacity of the proposed design model was about 2% lower than that of the tests. The results also showed that the bond stress of the theoretical model (at the ascending and descending branches) of the stress-slip curve was approximately 5-10% of that of the experiment. © 2012 Elsevier Ltd. All rights reserved.
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pull out behaviour of axially loaded Basalt Fibre reinforced polymer bfrp rods bonded perpendicular to the grain of glulam elements
Construction and Building Materials, 2013Co-Authors: David Yeboah, Danny Mcpolin, Su Taylor, Raymond GilfillanAbstract:Abstract The behaviour of Basalt Fibre Reinforced Polymer (BFRP) loaded perpendicular to glulam timber elements was investigated. It was found that pull-out load increased approximately linearly with the bonded length up to maximum which occurred at a bonded length of 250 mm (∼15 times the hole diameter) and did not increase beyond this bonded length. Failure mode of the samples was mostly shear fracture which was located at the cylindrical zone at the timber/adhesive interface. Increased bonded lengths resulted in corresponding decrease in interfacial bond stress. At 250 mm bonded length, the pull-out capacity of the proposed design model was about 2% lower than that of the tests. The results also showed that the bond stress of the theoretical model (at the ascending and descending branches) of the stress–slip curve was approximately 5–10% of that of the experiment.
Su Taylor - One of the best experts on this subject based on the ideXlab platform.
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full scale testing and numerical analysis of a precast Fibre reinforced self compacting concrete slab pre stressed with Basalt Fibre reinforced polymer bars
Composites Part B-engineering, 2017Co-Authors: Bruno Dal Lago, Su Taylor, Peter Deegan, Liberato Ferrara, Mohammed Sonebi, Philip Crosset, Andrea PattariniAbstract:Abstract Steel-free pre-stressed reinforced concrete may be used in aggressive environments to increase the durability of structural elements and to limit the carbon footprint by replacing steel with high-strength Fibre composites. The design of a 10-m long steel-free precast Fibre-reinforced concrete slab, pre-stressed with Basalt-Fibre reinforced polymer (BFRP) bars and shear-reinforced with glass-Fibre reinforced polymer bars, is presented in this paper. Non-linear viscoelastic and elastic-plastic models have been employed for the prediction of the service and ultimate limit state flexural behaviour, respectively. Preliminary tests on the employed materials and a 3-point load test on the slab element are presented, together with indications on its manufacturing process. The proposed numerical analysis is validated against the experimental results.
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Pull-out behaviour of axially loaded Basalt Fibre Reinforced Polymer (BFRP) rods bonded perpendicular to the grain of glulam elements
Construction and Building Materials, 2013Co-Authors: David Yeboah, Danny Mcpolin, Su Taylor, Raymond GilfillanAbstract:The behaviour of Basalt Fibre Reinforced Polymer (BFRP) loaded perpendicular to glulam timber elements was investigated. It was found that pull-out load increased approximately linearly with the bonded length up to maximum which occurred at a bonded length of 250 mm (∼15 times the hole diameter) and did not increase beyond this bonded length. Failure mode of the samples was mostly shear fracture which was located at the cylindrical zone at the timber/adhesive interface. Increased bonded lengths resulted in corresponding decrease in interfacial bond stress. At 250 mm bonded length, the pull-out capacity of the proposed design model was about 2% lower than that of the tests. The results also showed that the bond stress of the theoretical model (at the ascending and descending branches) of the stress-slip curve was approximately 5-10% of that of the experiment. © 2012 Elsevier Ltd. All rights reserved.
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pull out behaviour of axially loaded Basalt Fibre reinforced polymer bfrp rods bonded perpendicular to the grain of glulam elements
Construction and Building Materials, 2013Co-Authors: David Yeboah, Danny Mcpolin, Su Taylor, Raymond GilfillanAbstract:Abstract The behaviour of Basalt Fibre Reinforced Polymer (BFRP) loaded perpendicular to glulam timber elements was investigated. It was found that pull-out load increased approximately linearly with the bonded length up to maximum which occurred at a bonded length of 250 mm (∼15 times the hole diameter) and did not increase beyond this bonded length. Failure mode of the samples was mostly shear fracture which was located at the cylindrical zone at the timber/adhesive interface. Increased bonded lengths resulted in corresponding decrease in interfacial bond stress. At 250 mm bonded length, the pull-out capacity of the proposed design model was about 2% lower than that of the tests. The results also showed that the bond stress of the theoretical model (at the ascending and descending branches) of the stress–slip curve was approximately 5–10% of that of the experiment.
David Yeboah - One of the best experts on this subject based on the ideXlab platform.
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Pull-out behaviour of axially loaded Basalt Fibre Reinforced Polymer (BFRP) rods bonded perpendicular to the grain of glulam elements
Construction and Building Materials, 2013Co-Authors: David Yeboah, Danny Mcpolin, Su Taylor, Raymond GilfillanAbstract:The behaviour of Basalt Fibre Reinforced Polymer (BFRP) loaded perpendicular to glulam timber elements was investigated. It was found that pull-out load increased approximately linearly with the bonded length up to maximum which occurred at a bonded length of 250 mm (∼15 times the hole diameter) and did not increase beyond this bonded length. Failure mode of the samples was mostly shear fracture which was located at the cylindrical zone at the timber/adhesive interface. Increased bonded lengths resulted in corresponding decrease in interfacial bond stress. At 250 mm bonded length, the pull-out capacity of the proposed design model was about 2% lower than that of the tests. The results also showed that the bond stress of the theoretical model (at the ascending and descending branches) of the stress-slip curve was approximately 5-10% of that of the experiment. © 2012 Elsevier Ltd. All rights reserved.
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pull out behaviour of axially loaded Basalt Fibre reinforced polymer bfrp rods bonded perpendicular to the grain of glulam elements
Construction and Building Materials, 2013Co-Authors: David Yeboah, Danny Mcpolin, Su Taylor, Raymond GilfillanAbstract:Abstract The behaviour of Basalt Fibre Reinforced Polymer (BFRP) loaded perpendicular to glulam timber elements was investigated. It was found that pull-out load increased approximately linearly with the bonded length up to maximum which occurred at a bonded length of 250 mm (∼15 times the hole diameter) and did not increase beyond this bonded length. Failure mode of the samples was mostly shear fracture which was located at the cylindrical zone at the timber/adhesive interface. Increased bonded lengths resulted in corresponding decrease in interfacial bond stress. At 250 mm bonded length, the pull-out capacity of the proposed design model was about 2% lower than that of the tests. The results also showed that the bond stress of the theoretical model (at the ascending and descending branches) of the stress–slip curve was approximately 5–10% of that of the experiment.
Wensu Chen - One of the best experts on this subject based on the ideXlab platform.
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interfacial bond behaviour between hybrid carbon Basalt Fibre composites and concrete under dynamic loading
International Journal of Adhesion and Adhesives, 2020Co-Authors: Cheng Yuan, Wensu Chen, Thong M PhamAbstract:Abstract An experimental investigation on the dynamic interfacial bond behaviours between hybrid carbon/Basalt Fibre reinforced polymer (FRP) sheets and concrete under high loading velocities (i.e., 8.33E-6, 1.0, 3.0, and 8.0 m/s) is carried out in this study. The single-lap shear specimens are evaluated with different stacking sequences of FRP sheets (i.e., CFRP and BFRP) bonded to the concrete substrates. Experimental results including debonding failure modes, ultimate debonding strain, debonding load, interfacial fracture energy, and bond-slip response are discussed and evaluated. The testing results show that the interfacial bond behaviours between either sole FRP sheet or hybrid carbon/Basalt FRP composite and concrete are sensitive to strain rate. The sole FRP sheet exhibits higher strain rate sensitivity than hybrid composite. The interfacial shear resistance between hybrid FRP sheets and concrete is improved due to the effect of FRP hybridization and strain rate. Additionally, the stacking sequence of FRP composites results in different bond performance when the loading speed is less than 1 m/s, while the effect of stacking sequence on bonding behaviour is insignificant when the loading speed is over 1 m/s. The hybrid composites have a relatively longer effective bond length under both quasi-static and dynamic loadings. Empirical formulae are proposed based on the test data to predict the dynamic interfacial bonding strength and shear stress between single or hybrid FRP sheet and concrete at various strain rates.
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quasi static and dynamic tensile properties of Basalt Fibre reinforced polymer
Composites Part B-engineering, 2017Co-Authors: Wensu Chen, Michael Jong, Li Chen, Thong M PhamAbstract:Abstract Basalt Fibre Reinforced Polymer (BFRP) has been becoming more and more popularly used in structural strengthening and rehabilitation due to its advantages of high strength to weight ratio, easy to install, and anti-corrosion. During the service life, BFRP strengthened structures might be subjected to dynamic loadings such as blast and impact loads. It is essential to understand the material mechanical properties, especially the dynamic material properties of BFRP for reliable predictions of the performances of BFRP strengthened structures subjected to dynamic loads. Very limited study on the static and dynamic tensile properties of BFRP material is available in the literature. In this study, quasi-static and dynamic tests of the unidirectional BFRP with a unit weight of 300 g/m2 were conducted to examine the material properties of tensile strength, modulus and failure strain at various strain rates. The strain rate sensitivity on the material properties of BFRP was analyzed and discussed. Empirical formulae for the strength, elastic modulus and failure strain of BFRP material were proposed to estimate the dynamic enhancement at different strain rates.
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numerical study of Basalt Fibre cloth strengthened structural insulated panel under windborne debris impact
Applied Mechanics and Materials, 2016Co-Authors: Qing Fei Meng, Wensu ChenAbstract:Strong winds happen around the world every year and cause enormous damages and losses. Besides large wind pressure, impact from windborne debris on building envelope is a major source of structural damage in strong winds. The debris lifted and carried by wind impacting on building envelop may create openings on building envelope which increase internal pressure of the building, and lead to roof lifting and even total building collapse. Preventing impact damage to structural wall and roof is therefore critical in extreme wind conditions. On the other hand Structural Insulated Panel (SIP) with Oriented Strand Board (OSB) skins is popularly used in the building industry. Previous studies revealed that such SIP panels had weak impact resistant capacity and do not meet the design requirements to resist windborne debris impact specified in Australian Standard (AS/NZS1170.2:2011) for their applications in cyclonic regions. To increase the capacity of such SIP panels against windborne debris impact, Basalt Fibre cloth was used to strengthen the panel. Laboratory tests found that SIP strengthened with Basalt Fibre cloth was effective in increasing its impact-resistant capacity. This paper presents the development of a reliable numerical model to predict the impact responses of Basalt Fibre cloth strengthened SIP panel in LS-DYNA. The accuracy of the numerical model is verified by comparing the numerical and experimental results. The validated numerical model provides a reliable tool to predict Basalt Fibre cloth strengthened SIPs.
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experimental and numerical study of Basalt Fibre cloth strengthened structural insulated panel under windborne debris impact
Journal of Reinforced Plastics and Composites, 2016Co-Authors: Qing Fei Meng, Wensu ChenAbstract:Strong wind causes damages and losses around the world. The windborne debris carried by strong wind might impact on building and create openings on the building envelop, which might threaten the occupants and cause further damages to the building. To address this issue, some wind loading codes including the Australian Wind Loading Code (AS/NZS 1170:2:2011) give design requirements. The resistance capacity of oriented strand board skins structural insulated panel was investigated and proved having low resistance to the projectile impact, and could not meet the impact resistance requirement for application in cyclonic region C and D defined in Australian Wind Loading Code. In this study, Basalt Fibre cloth is used to strengthen oriented strand board structural insulated panel to increase its capacity to resist windborne debris impact. This paper presents experimental and numerical study of structural insulated panel with or without Basalt Fibre cloth strengthening under windborne debris impact. Five specime...