Otu esi eme Foam Concrete Iji Foaming Agent

Ikuku, nitrogen, carbon dioxide, or oxygen is introduced into the concrete slurry, and then it is foamed by physical or chemical methods. N'ikpeazụ, it is cured and made into a tangible product with more micro-closed air holes and particular strength. It is called foam concrete.

What is the difference between foam concrete and lightweight concrete?

(1) Different materials

Lightweight aggregate is the use of lighter aggregates instead of ordinary sand and gravel aggregates.

Foam concrete uses conventional aggregates.

(2) Different performance

Because lightweight aggregate is lightweight, lightweight concrete has the characteristics of lightweight, good thermal insulation and fire resistance.

Foam concrete uses physical foaming or chemical foaming methods to introduce a large number of air bubbles into the pavement so that the concrete has lighter bulk density and lower thermal conductivity.

(3) Different bulk density

The weight of lightweight concrete is 800-1400kg/m3. The strength and thermal conductivity of lightweight concrete are higher than foam concrete.

Foam concrete has bubbles, and the bulk density is generally suitable below 600kg/m3.

How to make ụfụfụ ihe?

Ụfụfụ anụ ahụ na-ezo aka na ịfụfụ igwe. A na-ebute ikuku mgbe a na-akpagharị ma ọ bụ na-akpachasị ya site na igwe, na elu igwe na-eji ihe surfactant ma ọ bụ ihe ngwọta mmiri nke ihe na-arụ ọrụ n'elu kpuchie elu igwe. In the physical foaming process, to prevent the production of new materials through physical action, the size of the bubble diameter can be controlled by the sheer speed. The bubbles formed by physical foaming are uniform and stable. The type of foaming agent determines the quality of foamed concrete.

N'oge a, physical foaming mainly uses the air compressor as an instrument to blow air into the foaming agent, the foaming agent solution is made into foam, and the slurry and foam are mixed to obtain foam concrete. Physical foaming can adjust the performance of foam concrete by controlling the amount of foaming agent. The principle of the compressed air method is mainly to use pressure to blow air into the foam solution to form foam.

What is concrete foaming agent?

Currently commonly used physical foaming agents include: onye na-eme ụfụfụ resin, ihe oriri protein protein foaming gị n'ụlọnga, aluminum sulfonate foaming agent, onye na-eme ụfụfụ protein anụmanụ, hydrolyzed blood gel foaming agent, rosin acid soap foaming Agent. From the perspective of chemical composition, physical blowing agents mainly include surfactants and proteins. The more polar groups in the surfactant structure contain more hydrophilic groups, the stronger the hydrophilic effect and the better the bubble performance. Agbanyeghị, the water content on the surface of the foam layer is relatively high, which makes the stability of the foam worse. N'otu oge ahụ, onye surfactant nwere ike imekọrịta ihe na akụkụ ciment, hinder the hydration reaction, and reduce the strength of the foamed concrete. Protein-based foaming agents generate small molecules through the cleavage of peptide bonds and increase hydrophobic groups to form interfaces. E wezụga, hydrogen bonds are formed between special groups in the unit, so that the solution forms a foam liquid film with higher strength. The vegetable protein foaming agent is soluble in water, hardly affected by water hardness, adịghị egbu egbu, enweghị isi, strong foaming ability, and dense and creamy foam. Agbanyeghị, the stability of the foaming agent product is weak, and the foam stabilization time is short, which cannot achieve large-scale use. Animal protein foaming agent has the characteristics of high foaming ratio, ike dị elu, excellent stability, na ọnụ ala dị ala.

Na nchịkọta, the method of using the foaming agent to make foamed concrete is more suitable for foamed concrete over 400 n'arọ/m3. The foam formed by mechanical rotation of the foaming machine or filled with gas, the cells are relatively uniform, the radius is small, and the stability is relatively stable. Most of the cells are closed cells, there are few connected cells, and the water absorption is relatively low.

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