What are the external wall insulation materials?

Introduction of external wall thermal insulation grid cloth

External wall thermal insulation grid cloth (glass fiber grid cloth) is a new type of alkali-resistant product, which is made of medium-alkali or alkali-free glass fiber mesh yarn, woven glass fiber grid cloth as the base material, coated with acrylic polymer solution and dried. The product has the characteristics of stable structure, high strength, alkali resistance, corrosion resistance and good crack resistance, and has the best reinforcement effect and simple construction. It is mainly suitable for the reinforcement and crack prevention of internal and external surfaces of cement, gypsum, walls, buildings and other structures, and is a new building material for external wall insulation engineering.

The alkali-resistant coated glass fiber grid cloth containing zirconium dioxide is based on the glass fiber woven fabric containing zirconium dioxide and coated with polymer alkali-resistant emulsion. Therefore, it has excellent alkali resistance, flexibility and warp and weft tensile strength, reaching the national standard JG 158-2004, and can be widely used in external thermal insulation system, waterproof and crack prevention of building particle external walls.

Material 2

Phenolic resin foaming material

Phenolic foam material is a kind of polymer organic hard aluminum foil foam product, which is formed by foaming thermosetting phenolic resin. It is light, fireproof, non-flammable, smokeless, non-toxic and non-dripping, and does not shrink or embrittle in a wide temperature range (-196 ~+200℃). It is an ideal thermal insulation material for heating, ventilation and refrigeration engineering. Phenolic foam has high closed cell rate and low thermal conductivity. Phenolic aldehyde has a benzene ring structure, so its size is stable, and its change rate is

Phenolic foam is known as the "king of thermal insulation materials" and is a new generation of thermal insulation, fire prevention and sound insulation materials. Phenolic foam materials have developed rapidly in developed countries and have been widely used in construction, national defense, foreign trade, warehousing, energy and other fields. Among the sound insulation foams used in American construction industry, phenolic materials have accounted for 40%; Japan has also set up a phenolic foam popularization association to promote this new material.

Phenolic foam is also internationally recognized as the most promising new thermal insulation material in buildings. Because this new material is essentially different from the ordinary polymer resin obtained by adding flame retardant, it will not burn, melt or emit toxic smoke in fire, and it has the advantages of light weight, non-toxic, non-corrosive, heat preservation, energy saving, sound insulation and low price. Moreover, it does not need freon foaming, has no environmental pollution, good processability and convenient construction, and its comprehensive performance is incomparable to all kinds of thermal insulation materials. It has indisputable comprehensive advantages in cold storage, cold storage and heat preservation of industrial pipelines and equipment such as petrochemical industry, building partition wall, external wall composite board, ceiling and sound absorption board. It solves the problems that the fire resistance of other organic materials is not ideal, while inorganic materials have large water absorption, which is easy to "expose" and itchy skin during construction. It is the third generation best thermal insulation material for air conditioning systems and various electrical appliances.

In addition, phenolic foam is likely to replace it as a highly competitive new building material because of its poor flame retardant performance and large toxic gas emission.

Material 3

Foamed cement thermal insulation material

brief introduction

English name: foamed cement

Foamed cement is the earliest material used in Germany, and it was introduced to China around 1980. The foaming agent is fully foamed mechanically through the foaming system of the foaming machine, and the foam is evenly mixed with the cement slurry, and then cast-in-situ construction or mold forming is carried out through the pumping system of the foaming machine, and a new type of lightweight thermal insulation refractory with a large number of closed pores is formed through natural curing. It belongs to bubble-like thermal insulation material, and its outstanding feature is that closed foam holes are formed in concrete, which makes the concrete light and warm.

trait

Thermal insulation: the thermal conductivity is 0.06-0.28W/(M.K), and the thermal resistance is about 10-20 times that of ordinary concrete.

Lightweight: the dry bulk density is about 300- 1600KG/M3, which is equivalent to 1/5 ~ 1/8 of ordinary cement concrete, which can reduce the overall load of the building.

Integrity: it can be poured on site, closely combined with the main project, and there is no need to leave boundary joints and ventilation pipes.

Low elastic shock absorption: the porosity of foamed cement makes it have a low elastic modulus, which makes it have a good absorption and dispersion effect on impact load.

Sound insulation: Foamed cement contains a large number of independent bubbles, which are evenly distributed. The sound absorption capacity is 0.09-0. 19%, which is five times that of ordinary concrete and has effective sound insulation function.

Compressive strength: the compressive strength is 0.6-25.0MPA

Water resistance: Cast-in-place foamed cement has small water absorption rate, relatively independent closed bubbles, good integrity and certain water resistance.

Durability: same as the life of the main project.

Simple construction: Only using cement foaming machine can realize automatic operation and long-distance transportation with vertical height of 200m, and the workload is 150-300 m3/ working day.

Productive processability: Foamed cement can not only be produced into various products in the factory, but also be used for on-site construction. It can be directly poured into roofs, floors and walls, and can be sawed, planed, nailed and drilled.

Environmental protection: The raw materials of foamed cement are cement and foaming agent, which are neutral and do not contain harmful substances such as benzene and formaldehyde, thus avoiding environmental pollution and fire hazards.

Fire resistance: Because the main raw material of foamed cement is cement, cement is an inorganic material, which is completely fire-resistant.

Economy: low comprehensive cost.

applied range

Foamed concrete is widely used in energy-saving wall materials because of its good characteristics, and it is also used in other aspects. The applications of foamed concrete in China are mainly cast-in-place foamed concrete insulation layer on the roof, foamed concrete block, foamed concrete lightweight wallboard and foamed concrete compensation foundation. However, making full use of the good characteristics of foamed concrete can continuously expand its application fields in building engineering, speed up the progress of the project and improve the quality of the project, as follows:

(8) Application of landscaping. Making foamed cement with bulk density of 600- 1000kg/m? Can be used as handrails, rockeries, stools, tables, etc. in gardens.