I. Choose the correct variant and complete the sentences. Memories them:

1. Plastics can be applied ... (a) only in radio engineering, b) to almost every branch of building}. 2.Decorative plastics has brought about... (a) some advantages, b) a revolution in interior and exterior design). 3. Plastics are used ... (a) only for decoration, b) are sufficiently rigid to stand on their own without any support). 4. Laminate has been developed for ... (a) only inside use, b) only outside use, c) both inside and outside use). 5. Laminate is impregnated with ... (a) thermosetting resins, b) rubber). 6. The sandwich is pressed and subjected ... (a) to cold, b) to heat). 7. The laminate gives ... ( a) a mild surface, b) tough surface).

II. Answer the following questions:

1.Where can plastics be applied? 2. What advantages do plastics offer? 3. What can plastics be used for except decoration? 4. What does plastic material consist of? 5. What for is plastics recommended as a structural material?

FOAMED GLASS

Foamed glass is a high-porosity heat insulating material, available in blocks made of fine-ground glass and a frothing agent.

Foamed glass is widely used in prefabricated house building, to ensure heat insulation of exterior wall panels, and in industrial construction.

Foamed glass has a high mechanical strength, is distinguished by moisture, vapour and gas impermeability. It is non-inflammable, offers resistance to frost, possesses a high sound adsorption, and it is easily sewn and nailed.

Structural foamed-glass blocks designed to fill ceilings, and for making interior partitions in buildings and rooms, to ensure heat and sound insulation:

Volume mass, kg/m 150-250

Heat conductivity at 20±5° C, kcal/m-hr° C up to 0.1

Block thickness, mm 120

Heat-and-moisture resistant foamed glass used for heat insulation of surfaces at a service temperature up to 190° C:

Volume mass, kg/m¹ 130-JSOu

Heat conductivity, kcal/m-hr °C 0.045-0.055

Overall dimensions, mm 300x300x80

Structural elements and goods of decorative-acoustic foamed glass designed to ensure interior sound proofing and decorative finish:

Volume mass., kg/m 150-300

Sound absorption coefficient 0.4-0.55

Overall dimensions, mm 300x300x80

EXERCISES

I. Answer the following questions:

I. What is foamed glass? 2. Where is foamed glass used? 3. What are structural foamed-glass blocks used for? 4. What is the thickness of a structural block? 5. What are overall dimensions of decorative-acoustic foam^A4 glass? 6. What is the heat conductivity of structural foamed-glass blocks?

II. Read and translate the following word combinations:

insulating material; prefabricated house-building; resistance to frost; a high sound absorption; to fill ceilings; to ensure heat insulation

PLASTICS FROM ITALY

"Colorplast" factory in Rovigo (Italy) manufactures three main products: panels, window frames and door frames.

The rigid, extruded polyvinylchloride (PVC) panels are made in a large range of sizes, suitable for every kind of use. They are very strong, indeformable and are extremely easy to assemble and disassemble. For this reason they are of particular interest to architects and builders.

The second group of "Colorplast" products are ready-to-mount window frames, made of rigid PVC. They are completely draught-proof, water-proof, fire-proof and sound absorbent, indeformable, easy to install, economic and do not require maintenance. Moreover, they are available with different-types of openings in varying sizes and are designed to meet any specific requirement.

Finally, "Colorplast" produces' patented internal laminated plastic melamine doors. They are made up of laminated panels with honey-comb filling, finished with rigid PVC borders. The doorposts are made of wood with a laminated plastic finish.

EXERCISES