Foam concrete or the best building insulation material in the south
Thermal insulation materials are an important factor influencing building energy efficiency. At home and abroad, the insulation performance of buildings is generally emphasized, in order to greatly reduce energy consumption, thereby reducing environmental pollution and greenhouse effect, while improving the comfort of human settlements. The energy loss of Chinese housing is roughly 50% of the wall; the roof is about 10%; the doors and windows are about 25%; the basement and the ground are about 15%. To achieve real energy conservation in buildings, it is necessary to carry out all-round insulation and heat insulation on roofs, walls, walls and floors.
As the initiator of the China Foam Concrete and Cement Products Association foam concrete branch, a few days ago, when talking about the development direction of building insulation materials in southern China, Mr. Lu Wencheng, the chairman of Beijing Zhongke Zhucheng Building Materials Technology Co., Ltd. pointed out that foam concrete is currently the only one. It can be used for thermal insulation of building roofs, walls, walls and floors, and its technical features are more suitable for climatic conditions with small indoor and outdoor temperature difference in southern China; foam concrete can be said to be the best in the south under current conditions. Building insulation materials.
As a rising star of lightweight concrete - foam concrete, it is developed on the basis of aerated concrete. Since aerated concrete requires autoclaving, it cannot be applied on site. Although it has been applied for many years, the promotion is still limited, so people invented foam concrete. Its performance and pore structure are close to aerated concrete, but it does not need to be autoclaved. It is very suitable for the current policy requirements of environmentally friendly low-carbon waste, and can greatly reduce energy consumption. The water absorption and thermal conductivity of foam concrete are much lower than that of aerated concrete, and it can be easily poured in any building part. In the Nordic countries of North America, Sweden, Canada, Finland and other countries, the application of foam concrete in building insulation accounts for a large proportion, known as "building insulation clothing."
In addition to foam concrete, no other insulation material can be so widely used in various parts of the building envelope from head to toe. Foam concrete can only be so because it can be cast on site and can be molded into various products. From the material density, it can reach an ultra-low density of 100~300kg/m3, close to the expanded perlite. It can reach a high density of 600~1000kg/m3, and the strength can be from 0.4MP~10MPa, the thermal conductivity is 0.045~0.14 0.12W/(m·K), and the heat storage coefficient is about 3.0 W/(m2·K). . (The smaller the thermal conductivity is, the better the thermal insulation performance is. The higher the thermal storage coefficient is, the better the thermal insulation performance is.) The regional climate characteristics with small indoor and outdoor temperature difference in southern China determine the high thermal insulation performance and weak thermal insulation performance requirements. Requirements, therefore, for the southern residential construction, the heat storage coefficient is better than the thermal conductivity. The heat storage coefficient of foam concrete with a bulk density of 700 Kg/m3 is 3.59 W/(m2·K) and the heat storage coefficient of foam concrete with a bulk density of 500 Kg/m3 is 2.69 W/(m2·K), which is much higher than organic The value of foam 0.36 W / (m2 · K). Therefore, whether it is thermal insulation performance, heat storage performance or freezing and thawing, strength, light weight, fire and vibration, environmental protection and low carbon, construction convenience, construction cost and other aspects, foam concrete is the best building in southern China. Insulation Materials.
At the beginning of this century, Beijing Zhongke Zhucheng focused on the research and development and application of building thermal insulation foamed thermal insulation materials. In 2008, it became the cement-based foam research and development center of the (National) Building Materials Industry Technology Supervision and Research Center. The patented ZC inorganic foam insulation board developed by the company is a porous and light-insulated inorganic sheet. It is based on inorganic materials such as cement, fly ash and other solid waste materials. It is added with water and special admixture to form a mixture. After the slurry is injected into the mold, after oxidation, foaming and hardening under natural conditions, the honeycomb foamed concrete insulation board (also referred to as foamed cement insulation board) is formed by cutting and curing.
Beijing Zhongke Zhucheng applied the first inorganic foam insulation board to the external wall insulation and fire insulation belt in China. The first inorganic foam insulation board product and its application were compiled into the national standard atlas and the North China Atlas, the first in the North. The inorganic foam insulation board was applied to the external wall insulation. In 2012, it was the first in the country to obtain the cement-based foam insulation board of the Ministry of Construction, “Certificate of Scientific and Technological Achievement Evaluation of Construction Industry”, November 12, 2013, Beijing Zhongke Zhucheng The draft national building materials industry standard "JC-T2200-2013 cement-based foam insulation board" was released. Beijing Zhongke Zhucheng has led the transformation of the field insulation materials and is a leading company in the safety and energy saving inorganic foam concrete industry.
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