Composite admixture for steam-cured precast concrete segment and preparation method thereof
By using composite admixtures and low-temperature steam curing processes, the conflict between early strength and cracking, appearance quality and low carbon performance in the production of precast concrete segments has been resolved, enabling efficient production of high-quality segments at low temperatures and reducing energy consumption and costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CCCC THIRD HARBOR ENGINEERING CO LTD
- Filing Date
- 2026-05-08
- Publication Date
- 2026-07-17
AI Technical Summary
The existing production of precast concrete segments has problems such as the contradiction between early strength and cracking, appearance quality defects, and the conflict between low carbon and performance. In particular, there are problems such as temperature stress cracks caused by high-temperature steam curing in autumn and winter, excessive porosity, and insufficient early strength after reducing the amount of cement.
The composite admixtures include slag powder, fly ash, silica fume, fly ash microspheres, gypsum, defoamer, nano-hydrated calcium silicate crystal nucleation early strength agent, and crystalline waterproofing agent. They are uniformly mixed by grinding and replace part of the cement, combined with a low-temperature steam curing process to achieve early strength and porosity control.
Achieving demolding strength under low-temperature steam curing conditions reduces temperature cracks and pores, improves appearance quality, and balances low-carbon performance with reduced energy consumption and costs.
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Figure CN122403798A_ABST
Abstract
Citation Information
Patent Citations
Composite mineral admixtures, their preparation methods, and concrete prepared using them
CN108147704B