What is the difference between concrete air entraining agent and air entraining superplasticizer?

Air-entraining agent is an admixture that can introduce a large number of uniform bubble distribution, stable and closed micro-bubbles in the mixing process of concrete, so as to improve its workability and durability. It itself is a surfactant, commonly used air-entraining agents are: rosin soap and modified rosin soap, alkyl sulfonate and alkyl benzene sulfonate, saturated or unsaturated fatty acid sodium, lignosulfonate, alkylphenol ethoxylate, protein hydrolysate, saponaria powder, etc.

High-efficiency air-entraining and high-efficiency superplasticizer can improve the fluidity and plasticity of concrete, reduce water leakage and segregation, and improve flexural strength by 10% to 20%. The thermal diffusion and thermal conductivity of concrete mixed with this agent are reduced, and the volume stability of concrete and the weather resistance of various outdoor structures are improved. Road concrete is widely used in air-entraining agents, which is conducive to prolonging the service life of roads.

Pumped concrete mixed with air-entraining agent can improve fluidity and pumping pressure. The most significant advantage of air-bleed concrete is that it greatly improves frost resistance and salt frost resistance, and the suitable air content of concrete with frost resistance requirements is 3% 6%.

It can greatly improve the workability and pumpability of concrete, improve the durability of impermeability and frost resistance, and effectively prevent the secondary adsorption of cement in commercial concrete, and reduce the loss of concrete slump over time. Due to the high water reduction rate of JDU, it can greatly reduce the mixing of water reducer, save application costs and increase economic benefits.

The function of the air-entraining agent is mainly high water reduction (the highest water reduction rate can reach more than 10%), the air entrainment is moderate, the foam is fine, the stability is good, it is suitable for pumping concrete, waterproof concrete, large-fluidity concrete, and more suitable for commercial concrete construction.

It is mainly to improve the internal structure of concrete through an appropriate amount of air entrainment, which greatly improves the frost resistance of concrete.

If no initiator is added, the air content will exceed the standard, and the concrete will be undense and unstable; improve the workability of concrete; Improve the frost resistance of concrete;

Concrete citation mountain gas agent: It is one of the raw materials for making concrete.

Function: The addition of air-entraining agent to concrete can improve the durability of concrete and the rheological properties of fresh concrete; Adjust the concrete solidification performance and gas content; Provides special properties for concrete.

The production of concrete air-entraining agent is judged to be large

Rosin, tall oil, triterpene saponins and lignin were put into the reaction kettle according to the weight ratio of 40 100 0 40 0 10 0 10, stirred evenly after heating and melting, and after cooling the reactor to 50 100, the foam-stabilizing component d and the foam-stabilizing component E were added to the reaction kettle;

Continue to reduce the temperature of the reactor to 20 95, neutralize the obtained reactants with lye, and add tap water dropwise at the same time, control the solid content of the obtained solution to 29% 31%, pH = 9 11, that is, the final product.

Summary. Pro, concrete air-entraining agent is to play a role in:

The addition of air-entraining agent to concrete can improve the durability of concrete and the rheological properties of fresh concrete. Adjust the concrete solidification performance and gas content; Provides special properties for concrete.

What is the role of concrete air-entraining agent?

Pro, the role of concrete inducing agent is as follows: the incorporation of inducing air entrainment agent into concrete can improve the durability of concrete and the variation performance of fresh concrete; Adjust the concrete solidification performance and gas content; It provides special properties for concrete.

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Answers]: c, d, e

In addition to being used for frost-resistant, anti-seepage and anti-sulfate concrete, air-entraining agent and air-entraining superplasticizer should also be used for hail concrete, poor concrete and concrete with requirements for finishing, and Sousen light aggregate concrete, which should not be used for steaming concrete and prestressed concrete.