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Flexible Towpregs and Thermoplastic Composites for Civil Engineering Applications
Published in R. Alagirusamy, Flexible Towpregs and Their Thermoplastic Composites, 2022
Nabo Kumar Barman, R. Alagirusamy, S. S. Bhattacharya
Modular panelised structures are increasingly used due to the advantages of ease of bulk production, cost-effectiveness, customisation possibility during prefabrication of panels, ease of assembling at construction sites, light weight, and uniform quality of components. Modular structures are well suited for disaster prone areas in which structures can be erected in a short span of time. Structural insulated panels (SIPs) are one form of modular structures which consist of foam-based core (molded expanded polystyrene, extruded polystyrene, and urethane foam) sandwiched in between face sheet or laminates. The face sheets were conventially made using cement concrete board (CCB) or oriented strand board (OSB). The application of glass/PP-based face sheet for developing thermoplastic composite structural insulated panels (CSIPs) for walls and floor panels was explored (Uddin and Mousa 2013). The face sheets consist of glass/PP laminates in 70/30 weight proportion and core was expanded polystyrene (EPS) foam. A spray of hot thermoplastic melt was used to form CSIPs by binding the laminates and foam. The conventional SIPs require 24 hours for fabrication; however, the CSIPs can be fabricated within two hours. CSIPs appear to be highly resistant to impacts, undergo marginal deterioration in strength and stiffness during flood tests, and withstand extreme windstorm (Level-5 Hurricanes).
Materials
Published in Bjørn N. Sandaker, Arne P. Eggen, Mark R. Cruvellier, The Structural Basis of Architecture, 2019
Bjørn N. Sandaker, Arne P. Eggen, Mark R. Cruvellier
Structural insulated panels (SIPs) are industrial products that consist of a sandwich of two layers of wood panels, usually OSB (oriented strand board) or plywood, with an insulating layer of foam in between them. The rigid insulation core and the facing panels perform as web and flanges respectively, securing adequate strength and stiffness for SIPs to find applications in relatively short height/span walls, floors, and roof surfaces.
Performance evaluation for energy efficiency attainment in buildings based on orientation, temperature, and humidity parameters
Published in Intelligent Buildings International, 2022
Wasim Khaliq, Umaid Bin Mansoor
When the model performance was compared with NESPAK House, the SCIP technique used in the model comes out to be 3% more temperature efficient and 6% more humidity efficient. The same model, when compared with Telecom Tower, comes out to be 6% and 5% more efficient in temperature and humidity respectively. This is attributed to the insulation properties of SCIP which includes the dense thermopore all around the walls and roof of the model. The wide use of structural insulated panels (SIP) in commercial, residential, and industrial buildings provide structural safety and distributed thermal mass (Medina et al. 2008). Thermopore has a low thermal conductivity of 0.026 W/m-K and adequate strength of about 150 kPa, therefore it can be used in energy-efficient building construction. The energy efficiency in the model is significant because the thermopore panels are properly insulated and no outside temperature fluctuations are allowed to affect the system. A controlled environment is said to be generated confirming the behavior to be energy efficient.
Observations of energy consumption and IEQ in a ‘Tiny House’
Published in Building Research & Information, 2020
In both the THs, due to the small volume of the interior spaces, the occupants were in close proximity to the exterior surfaces of the enclosure. The impact of exterior surface temperatures on occupant thermal comfort is magnified as the mean radiant temperature (MRT)5 is dominated by these surfaces. Hence, anomalies in building envelope construction, such as thermal bridging and infiltration, considerably contribute to the thermal discomfort and should be addressed by appropriate materials and construction methods. For example, the use of Structural Insulated Panels (SIPs) for floor, walls and roof result in improved insulation, reduced thermal bridging and reduced infiltration, making it a better material than more conventionally implemented stick frame construction.