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What are the types of superplasticizer?

Release time:

2022-06-29

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What are the types of superplasticizer?

高效减水剂的种类有哪些？

Naphthalene series water reducing agent

Naphthalene water reducing agent is dark brown powder or liquid. Powdered raw materials, solid content up to 95% (water content of about 5%), transportation and storage more convenient, add 60% water can be dissolved into liquid.

naphthalene seriesSuperplasticizerIt has the characteristics of low dosage, large shrinkage rate, small slump loss, good volume reliability, and no rust on building steel bars. Its quality standards are: low intake and large shrinkage.

naphthalene seriesSuperplasticizer: Divided into liquid and powder equipment. Liquid, the general concentration value is about 40%.

Advantages: It is a large total output and wide range of applications in China at this stage.Superplasticizer. It is characterized by high water reduction rate (15% ~ 25%), no gas, little harm to setting time, good adaptability to concrete, can be used in conjunction with other kinds of water reducing agent, and the price is cheaper.

Disadvantages: independent application, rapid destruction, the adaptability of some concrete needs to be improved, low temperature in winter is prone to sodium sulfate crystallization, which is not very environmentally friendly.

Aliphatic water reducing agent

The admixture is synthesized organically by sodium formaldehyde sulfite in toluene, and is reddish brown. Rich production of raw materials, cost-effective. The processing technology is simple and clear, the production cost is low, and the water reduction rate is high. The actual effect of improving the melting level of concrete is similar to that of naphthalene series and melamine tableware series superplasticizer.

The product has positive significance for the development trend of the compressive strength of concrete at the beginning and middle and late stages; the product has good compatibility with other water reducing agent components, and can be configured into a general-purpose product according to the composite type to achieve practical effects such as retarding, moisture-proof, and cold-proof.

Advantages: water reduction rate is relatively high, good adaptability

Disadvantages: The appearance of the liquid is reddish brown, and the concrete is bright red, which is visually unacceptable to everyone, and the liquid is inconvenient to transport.

melamine water reducing agent

Melamine water reducing agent is a kind of water-soluble polymer, its molecular formula is multi-branched, block doped irregular structure. Its main components are sulfonated melamine indoor formaldehyde condensation reaction products, which are cationic, early strength, non-air-entraining.SuperplasticizerThe water reduction rate is 25%.

Advantages: high water reduction rate; disadvantages: can not be used alone, need to use other additives thickening.

Disadvantages: very easy to bleed, catch the bottom, inconvenient transportation.

Polycarboxylate superplasticizer

Polycarboxylate superplasticizer produced by high-strength building materials is a high-performance water-reducing agent. Liquid is light yellow or red brown transparent liquid. It is a concrete thickener in concrete applications. Used to configure high strength, excellentSuperplasticizer.

The intelligent water reducing agent thickened by a variety of admixtures, such as underwater concrete agent, early strength agent, retarder, etc., has reached the international high level in terms of cost performance and high performance. Rank.

Advantages: low intake, large reduction, increase the use of admixtures; reduce concrete shrinkage and improve cohesion; strong molecular formula can be a feature; environmental protection (clean production); good slump retention; adaptability Strong; convenient and quick thickening; low cost thickening; high compressive strength.

Disadvantages: the requirements for construction conditions are relatively high, the requirements for concrete are relatively high, and the application cost increases.

Key words:

Superplasticizer

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Synthesis and compound method of high efficiency water reducing agent

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