Analysis on the function and application scope of

2022-07-22
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Cement admixtures, more widely known as cement additives, are additives that can help cement enhance or improve relevant characteristics, such as water reducer that can reduce the water content of cement, waterproof agent that can highlight the waterproof performance of cement, or hardness that can improve cement. Most of the concrete admixtures and cement admixtures sold in the market can be used in general. Common cement admixtures are in powdery solid particles and liquid state, which can significantly improve the quality of cement products

cement admixture is a kind of compound added in the mixing of cement concrete to improve and adjust the function of cement concrete. It can be organic, inorganic or compound. Its appearance is usually a brownish yellow powder. If it is a liquid, it is a brownish viscous liquid. Cement admixtures are often used in the construction of highways, bridges, tunnels, civil construction projects, etc. It can improve some properties of cement and make it better used in construction engineering. So what is the main function of cement admixture? How about the market price of cement admixture? Today, I'd like to briefly introduce some information about the role and price of cement additives, hoping to help you

Introduction to cement admixture

cement admixture is a kind of cement additive. When using cement, adding cement admixture will produce a special effect. Such as accelerating drying and reducing water content. Strictly speaking, cement admixture is also a kind of chemical agent. Cement admixtures are generally in liquid state, but some cement admixtures are powder, but their functions are basically the same

type of cement admixture

1. Early strength agent:

a. soluble inorganic salts: chloride, carbonate, nitrate, thiosulfate, silicate, aluminate, alkaline hydroxide, etc. B. soluble organic substances: triethanolamine, calcium formate, calcium acetate, calcium propionate and calcium butyrate, urea, oxalic acid, amine and formaldehyde condensate

2. Accelerator: iron salt, fluoride, aluminum chloride, sodium aluminate, potassium carbonate

3. Air entraining agent: wood resin salt, synthetic detergent, lignosulfonate, protein salt, fatty acid, resin acid and their salts

4. Water reducing agent and coagulant: lignosulfonate and its modification or derivatives, hydroxycarboxylic acid and its salts or its modification and derivatives, inorganic salts (zinc salt, borate, phosphate, chloride), ammonium salt and its derivatives, carbohydrates and polysaccharide acids or sugar acids Water soluble polymer (cellulose ether, melamine derivatives, naphthalene derivatives, polysiloxane and sulfonated hydrocarbons

5. Superplasticizer: naphthalene sulfonate formaldehyde condensate, polycyclic aromatic hydrocarbon sulfonate formaldehyde condensate, melamine sulfonate formaldehyde condensate, p-amino benzenesulfonic acid formaldehyde condensate, sulfonated ketoaldehyde condensate, polyacrylate and its graft copolymer, etc.

6. Aerator: hydrogen peroxide, metal aluminum powder, some adsorbed air Activated carbon

7. Grouting additives: retarder, gel, gel starch and methyl cellulose, bentonite, thickener, early strength agent, aerator

8. Expansion agent: fine iron powder or granular iron powder and oxidation accelerator, lime system, sulphoaluminate system

9. Binder: synthetic latex, natural rubber latex

10. Pumping agent: viscosity of synthetic or natural water-soluble polymer additives, organic flocculants, high specific surface inorganic materials (bentonite, silica, asbestos powder, asbestos staple fiber, etc.), cement admixtures (fly ash, hydraulic lime, stone powder, etc.)

11. Flocculant: polymer electrolyte

12. Colorants: gray to black (iron oxide black, mineral black, carbon black, ultramarine, phthalocyanine blue), light red to dark red (iron oxide red), brown (iron oxide brown, manganese rich brown soil, burnt cinnamon soil), green (chromium oxide green, phthalein Shang mu), white (titanium dioxide), etc.

13. Disinfectants and pesticides: polyhalides, dieldrin lotion and copper compounds

14. Moisture proofing agent: soaps, butyl stearic acid, some petroleum products

15. Seepage proofing agent: water reducer, calcium chloride

16. Alkali aggregate reaction inhibitor: lithium salt, barium salt, some air entraining agents, water reducer, retarder, pozzolana

17. Rust inhibitor: sodium nitrite, sodium benzoate, calcium lignosulfonate, phosphate, sodium fluosilicate, sodium fluoaluminate

composition of cement admixture

the composition of cement admixture mainly includes the following:

1 Cement accelerator 2 Cement early strength agent 3 Antifreeze 4 Cement water reducer 5 Cement waterproof agent 6 Cement curing agent 7 Cement expansion agent 8 Cement grinding aids, etc

role of cement admixture

there are three main roles of cement admixture. Firstly, the function of cement admixture is to accelerate the drying speed of cement. Cement admixture is an additive that can absorb water, which can greatly accelerate the drying speed of cement. Its other function is to enhance the strength of cement. Cement admixtures can completely dry the water in the cement, which greatly enhances the hardness of the cement. There is another thing about cement admixtures, which is to increase the weight of cement and increase the price of cement

price of cement admixtures

the market price of cement admixtures is actually relatively low, which is one of the reasons why people generally use cement admixtures. The market price of a kilogram of cement admixture is about 10 yuan, but a kilogram of cement admixture can be blended with a ton of cement. So its cost is very low

note: this price is for reference only! Due to different regions, of course, the price will also vary. For more relevant price details, please refer to the local dealer

editor's summary: common cement admixtures include urea, calcium chloride, glycerin, triisopropylamine, dicyandiamide polyol and so on. In the construction process, cement is essential. Bricklayers will add certain admixtures to cement to make its performance better and the cost can be reduced. A rough calculation shows that a ton of cement with admixtures can reduce the cost by about 5 yuan. If it is a large project, the cost saved is very objective

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