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Showing 1 to 20 of 57 for “"Fire resistance"”.
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The fire resistance of curvilinear masonry structures
L'abstract è presente nell'allegato / the abstract is in the attachment
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FIRE RESISTANCE OF CONCRETE-FILLED AND REINFORCED CONCRETE COLUMNS
<p>In order to calculate the fire resistance of a building component, it is necessary to know the temperature history of the component during exposure to fire. In this dissertation a numerical method is described for calculating the temperature field in fire-exposed columns. The procedure is based …
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Experimental study of UHPC with high fire resistance and meso-scale modelling
… modern buildings are still vulnerable to fire. Damage made to ultra-high performance concrete (UHPC) by fire or high temperature is usually severer than normal strength concrete (NSC) or high performance concrete (HPC) due to its compact internal structure. For example, strength loss of …
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Predictive Methods for the Fire Resistance of Single Skin and Sandwich Composite Materials
… use is the<br/>perceived poor performance in fire. The perception is due to the fact that organic<br/>compounds used in polymer composites are combustible. The loss of the Norwegian<br/>Navy’s composite mine hunter vessel Orkla in 2002 to a fire did much to prevent<br/>further widespread use …
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Beaver moderated fire resistance in the North Cascades and potential for climate change adaptation
<p>Climate change and fire suppression have altered historic fire regimes, creating conditions for larger, more intense fires. Intense burns can alter watershed hydrology, increasing the potential for harmful channel incision, which impairs riparian ecosystem function by lowering the water table, …
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Response of high strength concrete columns under fire-induced biaxial bending
Reinforced concrete (RC) columns, under fire conditions, can experience biaxial bending which can arise due to eccentricity in loading, uneven spalling, or due to significant thermal gradients generated through 1-, 2-, or 3-sides of fire exposure. High strength concrete (HSC) columns are especially …
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Polydimethylsiloxane Modification of Segmented Thermoplastic Polyurethanes and Polyureas
… (PDMS), which was intended to improve the fire resistance of polyurethane systems. The PDMS oligomer was successfully incorporated into the polyurethane backbone via one step solution polymerization. The effect of PDMS content on thermal stability, morphology, surface composition, …
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Bench Scale Characterization of Joints and Coatings
… large-scale test used to qualify assemblies for fire resistance, including heat transmission and structural integrity. The test requires specialized furnaces and full-scale assemblies that are 3.0 m (10 ft) or more on each side, making it very expensive to perform. In this study, we investigated …
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The performance of lightweight concrete brick containing expanded polystyrene and palm oil fuel ash
… EPS were observed to be low in strength and fire resistance performance. On the other hand, Palm Oil Fuel Ash (POFA) which is unprofitable agricultural waste that is extensively generated by the palm oil mill has been categorised as one of the pozzolanic materials that could be used as a …
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Preparación de nuevos nanocomposites multifuncionales de matriz epoxi basados en el empleo de materiales grafénicos
… suitable combination of electrical, thermal and fire resistance properties, due to the incorporation of fire retardant reagents (FRs) and GRMs with synergistic effect. The key points to achieve good results have been the optimization of the dispersion processes at different loads and the …
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Synthesis and Characterization of Phosphorus Containing Poly(arylene ether)s
… the thermal stability, mechanical strength, and fire resistance of thermoplastics. Phosphorus containing activated aromatic dihalides and bisphenols were synthesized in high purity. These monomers were successfully polymerized via nucleophilic aromatic substitution to afford high molecular weight …
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The structural response of steel I-section members subjected to elevated temperature gradients across the section
… temperatures likely to be reached in real fires in buildings or ISO 834 fire resistance tests. Experiments have employed nominally full size models, heated using high powered, ceramic insulated, electrical heating elements at temperatures up to 1000°C. The experiments have been conducted …
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Steel, steel/concrete composite and reinforced concrete beams and columns exposed to fire
… moments, lateral load and bi-axial bending. Any fire temperature characteristic can be specified. The numerical method has been validated by comparing results with a number of experimental results on steel, concrete and composite beams and columns from literature and with the experiments carried …
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Nanoenhanced Polyurea As A Blast Resistant Coating For Concrete Masonry Walls
… are looking for methods of improved blast resistance for concrete masonry walls. However, many available protective coatings are not flame retardant. This thesis focuses on nanoenhanced polyurea for applications in improving blast resistance, while possessing improved flame retardancy, of …
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Comparative Studies On Standard and Fire-Rated Gypsum Wallboards.
… term goal of this research is to improve the fire resistance of gypsum wallboard (GWB). Gypsum wallboard consists mainly of gypsum, i.e. calcium sulfate dihydrate, CaSO<sub>4</sub>•2H<sub>2</sub>O. In buildings, the chemical, mechanical and thermal properties of gypsum wallboard play an …
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Synthesis and characterization of new polycarbonate material systems
… materials were found to have superior solvent resistance as compared to the linear material while retaining much of the useful mechanical properties (high fracture toughness, etc.) of bisphenol A polycarbonate. Furthermore, the glass transition temperatures of the networks were found to …
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Scale Modeling of Tests with Combined Thermo-Structural Loading
Standard methods for fire resistance testing require large-scale assemblies and are typically conducted on specialized furnaces at considerable cost. This research focused on developing a scaling methodology for a reduced-scale fire resistance test that reduces the size of the test article while …
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Flammability and durability of bamboo fabric reinforced polypropylene composites and their hybrids
… and can also contribute substantially to fire resistance in composites. In this study, bamboo fabric has been used to reinforce polypropylene (PP) to produce eco-friendly composites. Hybridisation is a technique which may improve the strength and stiffness as well as the moisture …
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Laboratory Scale Study of Calcium Sulfate Hydration Forms
… to create gypsum wallboards with enhanced fire resistance. The main goal of this research is to better understand the dehydration properties of calcium sulfate dihydrate, and the hydration of calcium sulfate hemihydrate as well as anhydrous calcium sulfate. The lab-scale kinetics of these …
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