The use of aerated concrete

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Aerated concrete equipment utilizing waste of raw materials for the production of aerated brick, brick light, autoclaved brick, favored by the investors. In the aac plant equipment manufacturing enterprises, the Henan company has attracted worldwide attention, Henan Huayi Machinery Manufacturing Company Limited Joint National Institute, jointly set up a modern high-tech enterprises. The company is located in Henan Province, Zhengzhou national economic and technical development zone. The company covers an area of 35000 square meters, fixed assets about 36000000 yuan, engineering and technical personnel accounting for20% of all employees. The company has passed ISO9001: 2000 quality system certification, is the national enterprise quality management standards, China Aerated Concrete Association, mineral association member units, China Stone Association member units. In 2006, the company won the State Ministry of Commerce approval, and obtained the import and export of machinery products independent right of management. Henan Huayi company specializing in the production of light brick equipment, autoclaved brick, aerated brick equipment, aerated concrete block equipment, aerated concrete equipment, new building materials equipment. The company engineers for the investors to answer aerated concrete properties and uses:
1aerated concrete performance characteristics
Aerated concrete and ordinary concrete, foam concrete were compared, in building applications with the following characteristics:
(1) small density. Aerated concrete porosity in general 70% to 80%, which is made of aluminium powder gas formation porosity accounted for 40% of50%, formed by the water pore accounted for about 20% to 40%, most of stomatal aperture of 0.52mm, average pore size of about 1mm. As a result of these pores exist, usually a density of 400700kg / m ^ 3, than ordinary concrete light3 /5to 4 /5
(2) having the structural material necessary strength. The material strength and density are usually show direct ratio concern, aerated concrete also has this property, the volume density of 500700kg / m ^ 3products, the general strength of 2.56.OMPa, had as a structural material of the necessary strength condition, which is foamed concrete than.
(3) the elastic modulus and the creep than ordinary concrete. Aerated concrete elastic modulus [ (0.147- 0.245) x1O ^4MPa] than ordinary concrete (1.96x 10 ^4MPa )1 /10, so in the same load, the deformation than ordinary concrete; aerated concrete creep coefficient (0.8- 1.2) than ordinary concrete (1- 4) small therefore, in the same state of stress, the creep of concrete are smaller than ordinary.
(4) fire resistance. Aerated concrete is incombustible material, heated to 80in a100 degrees above, shrink and crack, but at 70 degrees before no loss of strength, and do not emit harmful gases. Fireproof performance.
(5) good insulation performance. And foam concrete, aerated concrete has good insulation performance advantages, its thermal conductivity is 0.1160.212W / ( m * K ),
(6) sound insulation performance is good, the sound absorption ability of autoclaved aerated concrete ( absorption coefficient is 0.20.3) than that of ordinary concrete is better, but the sound insulation capacity due to quality control and law, is proportional to the mass, so the aerated concrete than ordinary concrete, but better than the foam concrete.
(7) good durability. Aerated concrete long-term strength and stability, it is difficult to put on a par with foam concrete and its, but its frost resistance and resistance to weathering than the ordinary concrete, so the use of the necessary measures.
(8) ease of processing. Aerated concrete sawing, planing, cutting, drilling, nailing.
(9) the dry shrinkage performance can meet the construction requirements. Aerated concrete drying shrinkage and the standard value is not greater than 0.5mm / M ( temperature of 20 degrees, relative humidity 43% soil 2% ), if the water content is reduced, drying shrinkage are correspondingly reduced, so as to control the wall on the moisture content below 15%, masonry shrinkage value can meet the construction requirements.
(10) high construction efficiency. In the same weight conditions, aerated concrete block type, construction speed; in the same block type conditions, aerated concrete than ordinary concrete should be light, can not be lifting equipment, construction costs less.
As a result of aerated concrete with light weight, high strength, easy processing, thermal insulation, heat insulation, sound insulation, fireproof performance etc., it by the construction industry and users of the welcome, development is rapid.
2aerated concrete application
Aerated concrete block the above ten characteristics, which are suitable for some of the following situations:
(1) tall frame buildings.
(2) in quake-resist area.
(3) the cold area construction.