High-Performance Water-Reducing Agent Application
1. Molecular Structure Customization
A polycarboxylate water-reducing agent with a side chain density of ≥1.2 per nm² is selected. Its steric hindrance effect can reduce the damage of the adsorption layer caused by high temperatures. When added with a 30% fly ash admixture, the water reduction rate can reach 35%-40%, with a one-hour slump loss of less than 10%. This high-side chain density polycarboxylate water-reducing agent forms a thick adsorption layer on the surface of cement particles, providing stronger steric repulsion, allowing the cement particles to maintain a well-dispersed state even in high-temperature environments. Furthermore, the addition of fly ash not only reduces cement usage and lowers the heat of hydration, but also creates a synergistic effect with the water-reducing agent, further improving the workability and durability of concrete.
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2. Slump-Preserving Synergistic TechnologyThe introduction of methyl allyl polyoxyethylene ether monomer creates a three-dimensional network structure. In a simulated environment at 50°C, combined with a retarding component, the concrete expansion can be maintained above 650mm for 120 minutes, meeting the pumping requirements of ultra-high-rise buildings. The introduction of methyl allyl polyoxyethylene ether monomers modifies the molecular structure of the polycarboxylate superplasticizer, forming a three-dimensional network structure that enhances its ability to encapsulate and disperse cement particles. In high-temperature environments, this structure effectively resists interference from cement hydration products, maintaining the fluidity and slump of concrete. When used in conjunction with retarding components, it can simultaneously delay cement hydration and maintain slump, meeting the demands of high-performance concrete construction, such as in ultra-high-rise pumping.
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Post time: Aug-11-2025