Beijing Dongke United Technologies Co.,Ltd.

Polycarboxylate superplasticizer

For the synthesis of polycarboxylic acid water-reducing agent, the design of molecular structure is very important, including the main chain group, side chain density and side chain length in the molecule. The synthesis methods mainly include in-situ polymerization grafting method, polymerization first and then functionalization method and monomer direct copolymerization method.

1. In-situ polymerization grafting method

Polyether is used as the polymerization medium of unsaturated monomers to make the main chain polymerization and the introduction of side chains proceed at the same time.

The process is simple, and the molecular weight of the synthesized water reducing agent can be controlled to a certain extent, but the ester involved in this method The chemical reaction is a reversible reaction, which is carried out in an aqueous solution, resulting in a relatively low grafting rate, which has been gradually eliminated.

2. First polymerization and then functionalization method

This method is mainly to synthesize the main chain of the water reducer first, and then introduce the side chain into functionalization by other methods. This method is difficult to operate, the molecular structure of the water reducer is not flexible and the compatibility between monomers is not good, making The use of this method has been greatly restricted.

3. Direct monomer copolymerization method

In this method, the reactive macromonomer is prepared first, and then the small monomer and the macromonomer are copolymerized under the initiation of an initiator in an aqueous solution. With the increasing maturity of the synthesis process of macromonomers and the increasing variety, this synthesis method has become the most commonly used method for the synthesis of polyanthoic acid water reducers at this stage.

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Polycarboxylate Superplasticizer

Concrete additives

Concrete additives are chemical substances mixed in the concrete mixing process, accounting for less than 5% of the cement mass, and can significantly improve the performance of concrete.

The most widely used PCE superplasticizer is also our main product (polycarboxylate superplasticizer). The superplasticizer is mainly divided into two forms, liquid PCE superplasticizer and powder PCE superplasticizer Agent.

The polycarboxylic acid superplasticizer has excellent slump retention performance and extremely high water reducing performance, which can significantly improve the plasticity index of fresh concrete, thereby improving the workability of the concrete pumping agent. At the same time, it also showed outstanding performance in terms of strength growth. It can be widely used in engineering projects such as ordinary concrete, super fluid self-compacting and high-strength durable concrete.

Polycarboxylic acid type superplasticizer has excellent performance in slump retention and water reduction, can significantly improve the plasticity index of fresh concrete, and at the same time enhance the pumping and construction performance of concrete, and greatly improve Concrete strength. It has a wide range of applications in engineering products that require various concretes, such as ordinary concrete, pumped concrete, super fluid self-compacting concrete, and high-strength and durable concrete.

Next is our factory’s own tests on our water-reducing agent products and concrete with thick water-reducing agent added to our production:

Test the flow rate of pure pulp

Compressive strength test of concrete test block

Concrete slump expansion test

Test the PH value of additives

Polycarboxylic acid water reducer has a wide range of applications. The superplasticizer can be used in the manufacture of cast-in-place concrete, reinforced concrete and prestressed concrete for high-speed railways, highways, commercial concrete stations, ports and docks, hydropower stations, etc.

In addition, this product is specially designed for projects (nuclear power plant projects) that have higher requirements for transportation or construction periods and slump retention.

The appearance of water reducing agent is divided into polycarboxylate superplasticizer liquid,polycarboxylate superplasticizer monomer,polycarboxylate superplasticizer flakes.