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Due to the low softening point, ordinary polycarboxylate superplasticizers cannot be powdered by spray drying. Molecular design to increase softening point without losing water-reducing performance yields high-content powdered polymers.
High-efficiency water reducer product overview High-efficiency water reducer is an important concrete additive, which can effectively reduce the water-cement ratio of concrete, thereby improving the strength and durability of concrete. Compared with traditional water reducers, high-efficiency water reducers have the following advantages:
Polycarboxylate water-reducing agents has the properties of high water reduction and high slump retention, and can impart high strength and durability to concrete. It has shown outstanding advantages in high-quality projects such as national large-scale water conservancy, nuclear power, and bridges. Compared with naphthalene-based water-reducing agents, polycarboxylate water-reducing agents are sensitive to the mud content of sand and gravel aggregates [1-3] and are expensive. Therefore, in laboratories and engineering construction, attempts have been made to mix polycarboxylate water-reducing agents and naphthalene-based water-reducing agents to take advantage of their respective advantages.
How much can the water reduction rate of polycarboxylic acid high-performance water reducer reach? First of all, we should know that the water reduction rate of polycarboxylic acid water reducer refers to the percentage of water consumption that can be reduced under the specified dosage, that is, the water reduction rate. For example, it was originally necessary to use 100g of water to make the mortar mix.
Due to its excellent properties, polycarboxylate superplasticizers are widely used in many fields, including:
Polycarboxylate polymer powder olycarboxylic acid powder breaks the convention in the production process and adopts thermal synthesis process, which can reduce production costs in terms of energy consumption. No release agent is added, and the purity of the produced products is higher, with the solid content controlled at around 98%. In terms of product performance, high-purity products have the characteristics of low dosage, high active ingredients and good collapse-preserving properties, further reducing customer costs.
Polycarboxylate ether superplasticizer has good dispersibility and flowability for cement at low dosage; When the dosage is greater than 0.12% to 0.22%, there is a very significant increase in the fluidity of the slurry; The loss of fluidity of the slurry within 1 hour decreases with the increase of the dosage.