Abstract
One of the main priorities for the implementation of the tasks set in the Address of the Head of State Nursultan Nazarbayev to the people of Kazakhstan “Kazakhstan’s way - 2050: common goal, common interests, common future” is the transition of traditional industries of Kazakhstan to the production of high value added products. Structural insulated panel (SIP) in common people is a sandwich panel. Aside from the architectural and aesthetic requirements for building projects, sandwich panels could be called the ideal building material. The shell of sandwich panels is made with a good and reliable anti-corrosion coating, the insulation material has a low thermal conductivity, minimal moisture absorption, sufficient mechanical strength, and high durability. And the sandwich panel itself is resistant to harmful ultraviolet radiation, atmospheric and mechanical influences. In addition, any communications are easily laid through sandwich panels: drilling or cutting this structure is much easier than reinforced concrete panels.
Highlights
Structural insulated panel (SIP) plates 17.4 cm thick with dimensions 62.5x250 are recommended for installation of roofs and intermediate floors
Based on the results of the studies performed, the following conclusions can be drawn: 1) On the basis of experimental studies were determined the physical and mechanical characteristics of the polyurethane foam filler of the middle layer: density 55 kg/m3, thermal conductivity coefficient 0.028 kcal/m·h, moisture absorption 0.1% in 24 hours at a relative humidity of 96%, water absorption 2.0% in 24 hours at saturation with water, adhesion strength to metal sheets at uniform tearing off 3.0 kgf/cm[2], and at shear 2.5 kgf/cm[2], tensile strength 3.0 kgf/cm[2], shear strength 2.5 kgf/cm[2], modulus of elasticity in tension 100 kgf/cm[2], shear modulus 45 kgf/cm[2], content of flame-extinguishing additives, weight of 5% of the material of sheathing and fragments of the roofing panel when working in tension, compression and shear
2) Full-scale tests made it possible to determine the nature of the behavior of roofing panels when exposed to one-time and cyclic loads
Summary
In terms of their thermal characteristics, sandwich panels are superior to traditionally used building materials such as brick, wood, concrete, etc. The advantages of sandwich panels include: the quality of the enclosing structures; good thermal insulation; excellent moisture resistance; lightness and strength; corrosion resistance; durability; convenient and inexpensive installation; wide range of colors; modern design. Compare: a sandwich panel with expanded polystyrene or mineral wool insulation with a thickness of 150 mm in terms of thermal insulation properties corresponds to a brick wall with a thickness of 900 mm. With the same thickness of a brick wall and a sandwich panel, heating costs are reduced several times. Quality structural insulating products have certain technical and operational characteristics that should be considered. Panels with large geometric values (125x250) - for the construction of external walls
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