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What are the characteristics of concrete admixture?

Release time:

2022-12-30

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Concrete admixtures should be added in the mixing concrete link, accounting for less than 5% of the cement quality, can significantly improve the performance of concrete compounds. The characteristics of concrete admixtures are many kinds and small amount, which have great influence on the performance of concrete. It has the characteristics of low investment, good effect and obvious technical and economic benefits. Due to the continuous development of science and technology, concrete admixture has been more and more access to use, admixture has become a concrete in addition to the four basic components of the fifth key components.

Adsorbent storage tank

classification of concrete admixture:

1. Retarder:

A, soluble carbonate: fluoride, sulfide, phosphate, thiosulfate, aluminum silicate, aluminum salt, partial alkali nickel hydroxide, etc

B. Soluble organic compounds: triethanolamine, calcium formate, calcium acetate, calcium propionate and calcium phenylpropionate, urea solution, hydrochloric acid, amine and indoor formaldehyde condensate.

2. Accelerator: aluminum salt, chloride, sodium bisulfate, sodium aluminate, ammonium bicarbonate.

3. Retarder: wood epoxy resin salt, bromide, lignosulfonate, protein salt, oleic acid and resin acid and salt.

4. Water reducing agent and adjusting agent: lignosulfonate and modified materials or derivatives, methyl carboxyl and salt or modified materials and derivatives thereof, carbonate (zinc salt, borate, polyphosphate, fluoride), ammonia salt and derivatives, protein and hydrogen acid or gluconic acid, water-soluble polymer (cellulose ether, melamine tableware derivatives, naphthalene derivatives, siloxane and aminolysis nitrogen oxide compounds

5. High efficiency water reducing agent: naphthalene sulfonate indoor formaldehyde condensate, benzene sulfonate indoor formaldehyde condensate, melamine sulfonate indoor formaldehyde polycondensation reactant, p-primary amine benzenesulfonic acid indoor formaldehyde polycondensation reactant, aminolysis ketone aldehyde polycondensation reactant, polyacrylic acid salt and graft copolymer, etc.

6, air entraining agent: with hydroxyl, phosphonic acid, sulfonic acid polymer and methyl carboxyl (salt), organic chemical phosphonic acid (salt) and other organic compounds air entraining agent

7. Aerating agent: hydrogen peroxide, metal material alumina powder, some activated carbon in the air.

8. Expansion agent: fine vermicelli or granular vermicelli and air oxidation vulcanization accelerator, lime powder system, sulfur aluminum salt system.

9. Adhesive: synthetic latex, natural rubber natural latex.

water reducing agent

10, pumping agent: generated or pure natural water-soluble polymer to enhance viscosity, organic flocculant, high specific surface inorganic materials (sodium bentonite, silica, asbestos powder, asbestos polyester staple fiber, etc.), concrete admixture (coal ash, hydraulic lime powder, lime powder, etc.).

11. Coagulant: polymer electrolyte.

12. Additives: gray to black (iron oxide black, mineral black, carbon black, ultramarine, phthalocyanine blue), light red to red blood (iron oxide red), brown (compound brown, manganese-rich brown soil, burnt cinnamon soil), green (chromium oxide green, phthalein, etc.), white (titanium dioxide), etc.

13. Bactericides and insecticides: polyhalides, dieldrin moisturizing emulsion and copper nitrogen compounds.

14, moisture-proof desiccant: soap, butyl polyether, some petroleum products

15. Anti-seepage agent: water reducing agent, calcium chloride.

16. Alkali aggregate reaction inhibitor: lithium salt, barium salt, some retarder, water reducing agent, air entraining agent, volcanic magma.

17, rust inhibitor: sodium nitrite, sodium benzoate, calcium lignosulfonate, polyphosphate, sodium fluorosilicate, sodium fluoroaluminate.

18. Grouting admixture: air entraining agent, suspected gum, suspected gum tapioca starch and carboxymethyl cellulose, sodium bentonite, tackifier, retarder and air entraining agent.

Key words:

Concrete admixture

Specification for use of concrete admixture

Matters needing attention when using concrete admixture

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