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Classification of CLC blocks and current trends

2023-10-25 16:59:05  Blog

CLC blocks(Cellular Lightweight Concrete) is a recently developed lightweight thermal insulation material. It is created by fully foaming a foaming agent through Zhongke equipment, mixing the resulting foam with cement slurry, and then carrying out cast-in-place construction or mold molding through the equipment's pumping system. This process creates a large number of closed pores within the concrete, which provide excellent insulation properties. CLC concrete is made up of two sets of organic binders mixed with foaming agents, cement, fly ash, stone powder, and other materials. These ingredients create a polymer with a continuous structure that contains uniform pores. This bubble-shaped thermal insulation material is ideal for use in roof insulation and slope finding, ground insulation cushioning, filling foundation pits with upturned beams, and wall pouring. The closed foam holes created within the concrete make it lightweight and great for insulation. Overall, CLC concrete is an energy-saving material that provides excellent insulation properties, making it a popular choice for a variety of construction applications.


Characteristics of Cellular lightweight Concrete Blocks

CLC concrete is usually a kind of porous material made by mechanically preparing foam agent aqueous solution into foam, adding foam into the slurry consisting of siliceous materials, calcareous materials, water and various additives, and then mixing, casting, molding and curing. Due to the large number of enclosed pores in CLC concrete, it has the following good physical and mechanical properties.

1. Lightweight

The density of CLC concrete is small, and the density grade is generally 300-1800kg/m3. The density grade of commonly used CLC concrete is 300-1200 kg/m3. In recent years, Ultralight foam concrete with a density of 160kg/m3 is also used as CLC concrete. Because of the low density of foam concrete, the use of this material in building structures such as external and internal walls, layers, floors and columns can generally reduce the dead weight of buildings by approximately 25%, and some of them can reach 30% -40% of the total weight of structures. Moreover, for structural components, using CLC concrete instead of ordinary concrete can improve the load-bearing capacity of the component. Therefore, using CLC concrete in construction projects has significant economic benefits. Especially in the recent "Eleventh Five Year Plan", the "Medium and Long Term Energy Conservation Special Plan" has set specific goals for the domestic construction industry to achieve energy conservation, with an increase in the energy-saving standard coefficient to 65%. Make the market potential for building energy efficiency enormous.


2. Good insulation performance

Due to the presence of a large number of closed small pores in CLC concrete, it has good thermal performance, i.e., good insulation and insulation performance, which is not possessed by ordinary concrete. Normally, CLC concrete with a density grade ranging from 300 to 1200 kg/m3 has a thermal conductivity coefficient between 0.08 and 0.3w/(m · K) and a thermal resistance approximately 10-20 times that of ordinary concrete. The use of CLC concrete as a building wall and roof material has good energy-saving effects.

3. Good sound insulation and fire resistance performance

CLC concrete is a porous material. Therefore it is also a good soundproofing material. It can be used as a soundproofing layer on the floors of buildings, soundproofing panels on highways, and on top floors of underground buildings. Foam concrete is an inorganic material and will not burn, so it has good fire resistance. When used on buildings, it can improve the fire resistance of buildings.

4. Overall good performance

CLC concrete can be poured on-site for construction, closely combined with the main project.

5. Low elasticity and good shock absorption

The porosity of CLC concrete gives it a low elastic modulus, which enables it to have good absorption and dispersion effects on impact loads.

6. Strong waterproof performance

Cast-in-situ CLC concrete has a low water absorption rate, relatively independent closed bubbles, and good integrity, making it have a certain degree of waterproof performance.

7. Good durability and the same lifespan


8. Convenient production and processing

CLC shaped concrete can not only be produced into different products in the factory but also be used for on-site construction, directly pouring into roofs, floors, and walls.

9. Good environmental performance

The raw materials required for CLC concrete are cement and foaming agents, which are neutral and do not include harmful substances such as formaldehyde and benzene, avoiding environmental pollution and fire hazards.

10. Convenient construction

Simply use a cement foaming machine to achieve automated operation, which can pump long-distance transportation with a vertical height of 200 meters. The workload is 150-300 cubic meters per working day.

Application of Cellular Lightweight Concrete Blocks

The application range of CLC concrete is wide, and the following are specific application areas:

Thermal insulation: Due to the advantages of lightweight, high-strength, and energy-saving, CLC concrete is widely used in energy-saving materials such as roof insulation and slope finding, ground insulation and cushion layer, upper beam foundation pit filling, and wall pouring. It belongs to bubble shaped thermal insulation material and is characterized by forming closed foam holes in the concrete to make the concrete lightweight and heat insulation.

Architecture: CLC concrete can be used to replace traditional building structural materials such as wood and steel. It is suitable for the production of components such as floors, walls, and roof panels in prefabricated buildings, and has advantages such as environmental protection, energy conservation, high strength, and lightweight. In addition, it can also be used to make building decoration materials such as partition boards and stairs.

Other fields. CLC concrete can also be used in the production of waterproof rolls, external wall insulation boards, and other materials, as well as in projects such as highway embankments and airport runways.


Current trends of CLC blocks

The autoclave-free production technology does not use an autoclaved steamer, and the aerated block of the same quality and strength can reduce costs but also reduce the reduction. It is a new type of energy-saving and environmentally friendly production technology that is widely used in assembly environments. The cost of block-free is mainly used for the amount of cement added. In production, the amount of cement cannot be reduced to reduce the cost. Otherwise, it will affect the quality of the product.


TRUNNANO is a supplier of CLC concrete with over 12 years experience in nano-building energy conservation and nanotechnology development. It accepts payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea. If you are looking for high-quality concrete additives, please feel free to contact us and send an inquiry. (

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  • Luoyang Tongrun Info Technology Co., Ltd. ( is the world's leading nanomaterial technology developer and application manufacturer, the company has more than 20 years of industry experience, after years of scientific research and production, has been professionals in lightweight concrete and foam concrete solutions. We can supply concrete foaming agents, superplasticizers, aerogels and foam concrete strength enhancers for lightweight concrete mix, CLC blocks all over the world, suitable for ordinary cement foamed concrete cast-in-place, block, plate, insulation wall, etc.