High-performance preparation method of foam concrete

Foamed concrete itself is low in strength, its bulk density is not easy to control, and there is a problem of porosity. These problems make foam concrete have certain limitations in the application process. Then the adaptation of high-performance foam concrete in strength and density can be perfectly solved.

High-performance foamed concrete should be based on greatly improving the performance of ordinary foamed concrete, using modern concrete technology to make concrete, which has a great impact on durability, workability, practicability, strength, volume stability and economy. However, as a special kind of concrete, high-performance foamed concrete not only conforms to the general rules of ordinary concrete, but also has some of its own characteristics. Its constituent materials should meet the following technical requirements. It is necessary to pay attention to these when selecting raw materials for high-performance foamed concrete. problem

1 Cement selection

Various cements can be used to prepare foamed concrete. Because foamed concrete contains a lot of bubbles, which delays the cement hydration process, it is recommended to use sulphoaluminate cement, high alumina cement, Portland cement, and magnesite cement with fast setting time. , Gypsum, etc., but considering the durability of high-performance foamed cement, ordinary Portland cement concrete should be selected, especially when applied to important parts such as walls.

2 Foaming agent

Foaming agent is an important component in the preparation of foamed concrete and a key component that determines the performance of foamed concrete. It affects the pore size, uniformity, and sealing of foamed concrete, and ultimately affects the mechanical properties and durability of foamed concrete. Therefore, choosing a suitable foaming agent has become a key step in the preparation of high-performance foamed concrete. Through a large number of experiments, high-performance foam should meet the characteristics of stability, uniformity, and fineness required after the preparation of foamed concrete, and its unit volume contains as little organic matter (surface active substances) as possible, and the foaming agent becomes foam with a large amount of Surfactant, mixed with cement, will affect the change of cement and reduce the mechanical properties of the material. The greater the stability of the foam, in most cases, the more surface active substance content per unit volume, the greater the impact of cement. The strength of foam concrete is unfavorable and other measures. High-stability foam has good stability, fine and small bubbles, but the stability of air foam is supported by a large amount of surface active substances per unit volume. When added to cement, excessive surfactants will inevitably affect the cement water. However, the foam stability is poor, and the damage may be large after mixing with cement (sand), which is not suitable for the preparation of high-foam concrete. The more surface active substance content per unit volume, the greater the impact of cement, which is not conducive to the strength of foam concrete and other measures. High-stability foam has good stability, fine and small bubbles, but the stability of air foam is supported by a large amount of surface active substances per unit volume. When added to cement, excessive surfactants will inevitably affect the cement water. However, the foam stability is poor, and the damage may be large after mixing with cement (sand), which is not suitable for the preparation of high-foam concrete. The more surface active substance content per unit volume, the greater the impact of cement, which is not conducive to the strength of foam concrete and other measures. High-stability foam has good stability, fine and small bubbles, but the stability of air foam is supported by a large amount of surface active substances per unit volume. When added to cement, excessive surfactants will inevitably affect the cement water. However, the foam stability is poor, and the damage may be large after mixing with cement (sand), which is not suitable for the preparation of high-foam concrete.

3Concrete admixture

 The application of various foam concrete admixtures represented by water-reducing agents is one of the signs of modern high-performance concrete, and one of the characteristics of high-performance foam concrete should be low water-binder ratio. At present, in the domestic production of foamed concrete, a large number of admixtures such as superplasticizers are used. It is not common that the cement (mortar) slurry is mixed with a cement-to-cement ratio of about 0.5 or even higher. Different from other concretes, foamed concrete is formulated with a bubble-type water film. In addition to surfactants and air, it contains a large amount of water. Therefore, the bubbles contain water (because the bubbles will eventually break into water). The ratio of foamed concrete is above 0.6. After a large amount of air and water enters, the mechanical properties of foamed concrete are very low. Therefore, the preparation of high-performance foamed concrete requires the use of superplasticizers, mixed with cement (sand) and water-cement ratio, and the new type is used in the laboratory. Polycarboxylate water-reducing agent, the water-cement ratio can be reduced to about 0.2, which can greatly improve the strength of the substrate. In addition to water reducing agents, other commonly used admixtures (such as hydrophobic agents, coagulants, early-strength agents, foam stabilizers, etc.) used in high-performance foam concrete are also necessary ingredients for the production of high-performance foam concrete.

Foam concrete price

The price of foamed concrete will vary randomly with factors such as the production cost, transportation cost, international situation, exchange rate, market supply and demand of the protein foaming agent. Tanji New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for foamed concrete, please feel free to send to get the latest protein foaming agent prices.

Foam concrete supplier

As a global foam concrete supplier, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including water-based stearic acid emulsion, water-based calcium stearate, zinc stearate, etc.). , High-purity targets, functional ceramics and structural devices, and provide OEM services.