Beijing Dongke United Technologies Co.,Ltd.

polycarboxylate superplasticizer

High performance water reducing agent

Polycarboxylic Acid Water Reducer is an effective water reducing agent and cement dispersant in cement concrete applications. It is widely used in roads, bridges, dikes, tunnels, skyscrapers and other projects.

The water reducing agent is environmentally friendly, non-flammable, explosive, and can be safely transported on trains and cars.

Depending on the different body structure, polycarboxylate acid superplasticizers can be divided into two categories: One type uses acrylic acid or methacrylic acid as the backbone and grafts polyethers with different side chain lengths. The others are polyethers whose main bond is maleic anhydride and which have different side chain lengths. From this, various high performance water reducing products with different properties were derived.

Prior to the formation of the polycarboxylate water reducing agent, there was a need to regenerate the supernatants from the polycarboxylate supernatants. It has the advantage of low dosage, good droplet retention, low concrete shrinkage, high molecular structure control ability, and high yield potential. Significant advantages, such as the absence of formaldehyde in the process.

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

In many concrete projects, traditional high-performance concretes, such as the naphthalene series, are increasingly unable to meet project requirements due to technical performance limitations. A new generation water reducing agent, which has attracted much attention at home and abroad, polycarboxylate water reducing agent, high performance water reducing agent, because it really developed an effective molecular structure based on the cement mechanism scattered, it’s super scattered. Art and can prevent buckling of concrete without any noticeable delay, as at low concentration it offers greater softening effect, good fluidity retention, high degree of freedom for cement to adapt to a variety of multimolecular synthesis techniques and plenty of room for powerful concrete shrinkage, very low contaminant content and other technical performance characteristics that give concrete excellent workability, good strength development, excellent durability and a powerful polycyclic acid based water reducing agent . Arboxyl has good comprehensive technical advantages and environmental protection properties that meet the demands of modern concrete technology. Therefore, polycarboxylate-water reducing agent-high performance water reducing agents are gradually becoming a preferred mixture for the production of high performance concrete. Polycarboxylic acid additives reportedly accounted for more than 80% of all high-performance additive products in Japan and more than 50% in North America and Europe. In my country, polycarboxylate water reducing agents have only been successful in the Three Gorges Dam, Sutong Bridge, Tianwan Nuclear Power Plant, Beijing-Shanghai bullet train and other major national water protection systems , bridges, nuclear power and railways. Projects with remarkable results.


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