The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Biranchi Panda - One of the best experts on this subject based on the ideXlab platform.
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a concise review on interlayer Bond Strength in 3d concrete printing
Sustainability, 2021Co-Authors: Adewumi John Babafemi, Suvash Chandra Paul, John Temitope Kolawole, Jihad Miah, Biranchi PandaAbstract:Interlayer Bond Strength is one of the key aspects of 3D concrete printing. It is a well-established fact that, similar to other 3D printing process material designs, process parameters and printing environment can significantly affect the Bond Strength between layers of 3D printed concrete. The first section of this review paper highlights the importance of Bond Strength, which can affect the mechanical and durability properties of 3D printed structures. The next section summarizes all the testing and Bond Strength measurement methods adopted in the literature, including mechanical and microstructure characterization. Finally, the last two sections focus on the influence of critical parameters on Bond Strength and different strategies employed in the literature for improving the Strength via Strengthening mechanical interlocking in the layers and tailoring surface as well as interface reactions. This concise review work will provide a holistic perspective on the current state of the art of interlayer Bond Strength in 3D concrete printing process.
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measurement of tensile Bond Strength of 3d printed geopolymer mortar
Measurement, 2018Co-Authors: Biranchi Panda, Suvash Chandra Paul, Nisar Ahamed Noor MohamedAbstract:Abstract The structural capacity of construction joints in concrete bridges, deck and pavements mainly depends on the Bond Strength between the old substrate and new overlaid concrete. Sometimes, a mismatch in the properties of old and new concrete may lead to early age failure and shortened service life. Since in 3D concrete printing (3DCP), the whole object is made by layer by layer, Bond Strength is considered as one of the key parameters to ensure stability in the structure. For understanding Bond mechanism, it is essential to measure Bond Strength at the interface between new and old layer and investigate significant parameters affecting this property. In this direction, our current work targets to analyse tensile Bond Strength of 3D printed geopolymer mortar with respect to printing time gap between layers, nozzle speed and nozzle standoff di stance. A novel formulation of fly ash based geopolymer was made and printed using four-axis automated gantry system. Experimental findings reveal that the Bond Strength is a function of state of interface material between two nearby layers which can be influenced by material Strength development rate and 3D printing parameters.
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Measurement of tensile Bond Strength of 3D printed geopolymer mortar
Measurement, 2017Co-Authors: Biranchi Panda, Suvash Chandra Paul, Nisar Ahamed Noor Mohamed, Yi Wei Daniel Tay, Ming Jen TanAbstract:Abstract The structural capacity of construction joints in concrete bridges, deck and pavements mainly depends on the Bond Strength between the old substrate and new overlaid concrete. Sometimes, a mismatch in the properties of old and new concrete may lead to early age failure and shortened service life. Since in 3D concrete printing (3DCP), the whole object is made by layer by layer, Bond Strength is considered as one of the key parameters to ensure stability in the structure. For understanding Bond mechanism, it is essential to measure Bond Strength at the interface between new and old layer and investigate significant parameters affecting this property. In this direction, our current work targets to analyse tensile Bond Strength of 3D printed geopolymer mortar with respect to printing time gap between layers, nozzle speed and nozzle standoff di stance. A novel formulation of fly ash based geopolymer was made and printed using four-axis automated gantry system. Experimental findings reveal that the Bond Strength is a function of state of interface material between two nearby layers which can be influenced by material Strength development rate and 3D printing parameters.
J.f. Mccabe - One of the best experts on this subject based on the ideXlab platform.
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adhesive Bond Strength and compliance for denture soft lining materials
Biomaterials, 2002Co-Authors: J.f. Mccabe, Thomas E Carrick, Hiroshi KamoharaAbstract:Abstract Peel Bond Strength and tensile Bond Strength between three polyvinylsiloxane denture soft liners and a heat-cured acrylic resin denture base were measured using two adhesive systems. The soft lining materials differed only in regard of their filler content and compliance. The values of Bond Strength and mode of failure were explained in terms of the inherent Strength of the Bond and varying compliance and tear Strength of the soft material. For tensile testing, when Bond failure occurred through an adhesive de-Bonding mechanism, materials of low compliance (stiffer materials) produced the greatest tensile Bond Strength. Conversely, when the same materials were subjected to peel testing a different trend emerged; the material with lowest compliance produced the lowest peel Bond Strength. When de-Bonding occurs by tearing or snapping of the soft material, the measured value of Bond Strength was controlled by the tear Strength of the soft material. The results could be explained by a consideration of stress concentrations at the soft–hard material interface during 180° peel testing. Adhesives based on ethyl acetate solvents produced stronger Bond Strengths than equivalent toluene based adhesives, particularly for materials of low compliance. Bond failure for toluene based adhesives was predominantly adhesive, whereas that for ethyl acetate based adhesives was predominantly cohesive. Overall, the least resistance to peeling was exhibited by a material of low compliance (i.e. relatively stiff) Bonded with a toluene based adhesive. When an ethyl acetate based adhesive was used, all materials exhibited a resistance to peeling with a predominantly cohesive mode of failure.
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ex vivo Bond Strength of adhesive precoated metallic and ceramic brackets
Journal of Orthodontics, 1995Co-Authors: David Russell Bearn, John C Aird, J.f. MccabeAbstract:Compared with conventional adhesive systems, adhesive precoated (APC) are reported to have advantages in clinical use. The ex vivo Bond Strength to human premolar teeth of metallic and ceramic APC brackets was compared with that of identical brackets Bonded with TransBond (3M Unitek) light cured orthodontic adhesive, and patterns of failure were examined. There was no significant difference (P > 0.05) in mean Bond Strength between metallic brackets Bonded with the two systems. Ceramic brackets Bonded with TransBond had significantly higher (P < 0.05) mean Bond Strength and failure more normally occurred at the composite/enamel interface when compared with APC ceramic brackets and metallic brackets. Following deBonding no enamel damage was observed with either APC or conventionally Bonded ceramic brackets.
Pankaj Munjal - One of the best experts on this subject based on the ideXlab platform.
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Bond Strength and compressive stress strain characteristics of brick masonry
Journal of building engineering, 2017Co-Authors: S B Singh, Pankaj MunjalAbstract:Abstract In this study, masonry and its material characteristics such as compressive Strength of masonry prisms, bricks, mortars as well as Bond Strength (i.e., flexural and shear Bond Strengths) of brick and mortar joint are determined experimentally. The compressive stress-strain curves of brick, mortar, and masonry have been plotted and five control points have been identified on the stress-strain curve of masonry. The control points on the stress-strain curve would be useful for performance based design of masonry. Four types of bricks and three different types of mortars have been used in the experimental study. The compressive Strength of masonry and flexural Bond Strength are determined with a test on five bricks stack Bonded prisms. A Bond wrench apparatus fabricated as per ASTM standards was used for flexural Bond Strength test. The shear Bond Strength of masonry is predicted using masonry triplet. It is observed that the concrete bricks have low flexural as well as shear Bond Strengths due to less contact area.
Suvash Chandra Paul - One of the best experts on this subject based on the ideXlab platform.
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a concise review on interlayer Bond Strength in 3d concrete printing
Sustainability, 2021Co-Authors: Adewumi John Babafemi, Suvash Chandra Paul, John Temitope Kolawole, Jihad Miah, Biranchi PandaAbstract:Interlayer Bond Strength is one of the key aspects of 3D concrete printing. It is a well-established fact that, similar to other 3D printing process material designs, process parameters and printing environment can significantly affect the Bond Strength between layers of 3D printed concrete. The first section of this review paper highlights the importance of Bond Strength, which can affect the mechanical and durability properties of 3D printed structures. The next section summarizes all the testing and Bond Strength measurement methods adopted in the literature, including mechanical and microstructure characterization. Finally, the last two sections focus on the influence of critical parameters on Bond Strength and different strategies employed in the literature for improving the Strength via Strengthening mechanical interlocking in the layers and tailoring surface as well as interface reactions. This concise review work will provide a holistic perspective on the current state of the art of interlayer Bond Strength in 3D concrete printing process.
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measurement of tensile Bond Strength of 3d printed geopolymer mortar
Measurement, 2018Co-Authors: Biranchi Panda, Suvash Chandra Paul, Nisar Ahamed Noor MohamedAbstract:Abstract The structural capacity of construction joints in concrete bridges, deck and pavements mainly depends on the Bond Strength between the old substrate and new overlaid concrete. Sometimes, a mismatch in the properties of old and new concrete may lead to early age failure and shortened service life. Since in 3D concrete printing (3DCP), the whole object is made by layer by layer, Bond Strength is considered as one of the key parameters to ensure stability in the structure. For understanding Bond mechanism, it is essential to measure Bond Strength at the interface between new and old layer and investigate significant parameters affecting this property. In this direction, our current work targets to analyse tensile Bond Strength of 3D printed geopolymer mortar with respect to printing time gap between layers, nozzle speed and nozzle standoff di stance. A novel formulation of fly ash based geopolymer was made and printed using four-axis automated gantry system. Experimental findings reveal that the Bond Strength is a function of state of interface material between two nearby layers which can be influenced by material Strength development rate and 3D printing parameters.
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Measurement of tensile Bond Strength of 3D printed geopolymer mortar
Measurement, 2017Co-Authors: Biranchi Panda, Suvash Chandra Paul, Nisar Ahamed Noor Mohamed, Yi Wei Daniel Tay, Ming Jen TanAbstract:Abstract The structural capacity of construction joints in concrete bridges, deck and pavements mainly depends on the Bond Strength between the old substrate and new overlaid concrete. Sometimes, a mismatch in the properties of old and new concrete may lead to early age failure and shortened service life. Since in 3D concrete printing (3DCP), the whole object is made by layer by layer, Bond Strength is considered as one of the key parameters to ensure stability in the structure. For understanding Bond mechanism, it is essential to measure Bond Strength at the interface between new and old layer and investigate significant parameters affecting this property. In this direction, our current work targets to analyse tensile Bond Strength of 3D printed geopolymer mortar with respect to printing time gap between layers, nozzle speed and nozzle standoff di stance. A novel formulation of fly ash based geopolymer was made and printed using four-axis automated gantry system. Experimental findings reveal that the Bond Strength is a function of state of interface material between two nearby layers which can be influenced by material Strength development rate and 3D printing parameters.
A J Feilzer - One of the best experts on this subject based on the ideXlab platform.
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microtensile Bond Strength of three simplified adhesive systems to caries affected dentin
Journal of Adhesive Dentistry, 2010Co-Authors: Johannes D Scholtanus, A J Feilzer, Kenny Purwanta, Nilgun Dogan, C J KleverlaanAbstract:Purpose: The purpose of the study was to determine the microtensile Bond Strength of three different simplified adhesive systems to caries-affected dentin. Materials and Methods: Fifteen extracted human molars with primary carious lesions were ground flat until dentin was exposed. Soft caries-infected dentin was excavated with the help of caries detector dye. On the remaining hard dentin, a standardized smear layer was created by polishing with 600-grit SiC paper. Teeth were divided into three groups and treated with one of the three tested adhesives: Adper ScotchBond 1 XT (3M ESPE), a 2-step etch-and-rinse adhesive, Clearfil S? Bond (Kuraray), a 1-step self-etching or all-in-one adhesive, and Clearfil SE Bond (Kuraray), a 2-step self-etching adhesive. Five-mm-thick composite buildups (Z-250, 3M ESPE) were built and light cured. After water storage for 24 h at 37 degrees C, the Bonded specimens were sectioned into bars (1.0 x 1.0 mm; n = 20 to 30). Microtensile Bond Strength of normal dentin specimens and caries-affected dentin specimens was measured in a universal testing machine (crosshead speed = 1 mm/min). Data were analyzed using two-way ANOVA and Tukey's post-hoc test (p <0.05). Results: No significant differences in Bond Strength values to normal dentin between the three adhesives were found. Adper ScotchBond 1 XT and Clearfil S? Bond showed significantly lower Bond Strength values to caries-affected dentin. For Clearfil SE Bond, Bond Strength values to normal and caries-affected dentin were not significantly different. Conclusion: All the tested simplified adhesives showed similar Bond Strength values to normal dentin. For the tested 2-step etch-and-rinse adhesive and the all-in-one adhesive, the Bond Strength values to caries-affected dentin were lower than to normal dentin.
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effect of zirconia type on its Bond Strength with different veneer ceramics
Journal of Prosthodontics, 2008Co-Authors: Moustafa N Aboushelib, Cornelis J Kleverlaan, A J FeilzerAbstract:Purpose: The Bond Strength between veneer ceramic and the zirconia framework is the weakest component in the layered structure. This Bond was proven to be sensitive to the surface finish of the framework material and to the type of the veneer ceramic and its method of application. New colored zirconia frameworks were introduced to enhance the final esthetics of the layered all-ceramic restoration. The aim of this study was to investigate the effect of zirconia type, white or colored, and its surface finish on the Bond Strength to two veneer ceramics. Materials and Methods: Five commercial zirconia framework materials (Cercon white and yellow, Lava white and yellow, Procera zirconia) received either of the following surface treatments: CAD/CAM milled surface, airborne-particle abrasion, and liner application. Two veneering ceramics were used to veneer the specimens: Noble Rondo and Ceram Express. The disc-shaped layered specimens were cut into microbars, and microtensile Bond Strength (MTBS) test was conducted. Structural and chemical differences between the white and colored frameworks were evaluated using scanning electron microscopy (SEM) and energy dispersive analysis. Two-way ANOVA and Tukey post hoc tests were used to analyze the data (p < 0.05 was considered significant). Results: The type of zirconia framework had a significant effect on the core-veneer Bond Strength, which was material dependent. The Bond Strength to colored zirconia was significantly weaker compared to white zirconia frameworks. Different surface treatments had different effects on the core-veneer Bond Strength according to the zirconia material used. Although no marked chemical differences between the examined zirconia materials could be found, there were structural differences, especially between white and colored zirconia and for different zirconia frameworks of different manufacturers, which significantly affected core-veneer Bond Strength values. Conclusion: The addition of coloring pigments to zirconia frameworks resulted in structural changes that require different surface treatment before veneering. To prevent delamination and chipping failures of zirconia veneered restorations, careful selection of both framework and veneer ceramic materials, in addition to proper surface treatment, are essential for maintaining good Bond Strength.
