Lightweight Concrete Additives | High-Performance Foaming Agents for Cellular Concrete
Air, nitrogen, carbon dioxide, or oxygen is introduced into the concrete slurry, and then it is foamed by physical or chemical methods. ngäts'i, 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 o?
Physical foaming refers to mechanical foaming. Air is introduced during full stirring or shearing by machinery, and the sky is wrapped with a surfactant or an aqueous solution of a surface-active substance. In the physical foaming process, to prevent the production of new materials through physical action, Tamaño diámetro ar burbuja to da controlado ir nge ar velocidad cizallamiento. Ya burbujas formadas ya espuma física ya uniformes ne hingi mpa̲ti. Ar klase ar agente espumante determina ya hormigón espumoso.
Jar nuna ar etapa, Espuma física principalmente gi japu̲'be̲fi 'nar compresor ndähi komongu instrumento pa soplar ndähi jar agente espumante, Njäts'i ya agente espumante bí thogi jar espuma, Ne ar suspensión ne ar espuma ar mezclan pa da espuma hormigón. Espuma física to ajustar rendimiento hormigón espuma controlando yá 'bede ya agente espumante. Ar ndui ar nt'ot'e ndähi comprimido ar principalmente utilizar presión pa soplar ndähi ár njäts'i ya espuma pa formar espuma.
Nä'ä ge 'nar agente espumante hormigón?
'bu̲'bya comúnmente utilizado agentes espumantes físicos: Agente espumante jabón resina, Agente espumante ar proteína vegetal, agente espumante sulfonato aluminio, Agente espumante ar proteína animal, Agente espumante gel ar ji hidrolizado, 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. However, the water content on the surface of the foam layer is relatively high, which makes the stability of the foam worse. jar xkagentho pa, Ar surfactante to interactuar ko ya partículas ar su̲mento, 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. 'nehe, 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, hingi tóxico, inodoro, strong foaming ability, and dense and creamy foam. However, 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, mextha resistencia, excellent stability, and low cost.
In summary, the method of using the foaming agent to make foamed concrete is more suitable for foamed concrete over 400 kg yá 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.
Cie-China.org ar proveedor líder aditivos hormigón espuma, proporcionando agentes espumante hormigón, superplasticizer,reforzador ar resistencia ar hormigón espuma pa hormigón ligero, bloques CLC. Nu'bu̲ gí 'bu̲i mí honi agente espumante, Jaki ar mäte, hingi dude ar ga japi ar jar contacto ko ngekihe.