A mass solid waste-based low-carbon concrete maintenance-free agent and a preparation method thereof
By generating calcium-aluminum layered double hydroxide intercalated alkali-resistant hydrogel composite microparticles and compounding them with high-calcium solid waste micropowder, silicon-aluminum solid waste micropowder and modified porous carbon materials, the problems of early water loss, cracking and insufficient strength of low-carbon concrete based on bulk solid waste were solved. The water storage, water retention and slow-release water supply functions were realized in a high-alkali environment, and the engineering applicability of concrete was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HENGSHUI JITU TECH CO LTD
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing curing-free concrete technologies for low-carbon concrete based on bulk solid waste suffer from problems such as rapid early water loss, insufficient strength development, and plastic shrinkage cracking. In particular, the water absorption ratio decreases significantly in high-alkali, high-calcium, and high-sulfate pore solutions, making it difficult to match with solid waste-based cementitious systems.
The calcium-aluminum layered double hydroxide intercalation structure is generated by in-situ reaction of calcium and aluminum sources with acrylamide, acrylic acid, and 2-acrylamide-2-methylpropanesulfonic acid, forming an alkali-resistant controlled-release hydrogel network. The composite microparticles are combined with high-calcium solid waste powder, silica-alumina solid waste powder, and modified porous carbon materials to achieve continuous internal water supply, promote gelation reaction, and CO2 mineralization and densification.
Without watering or covering, it reduces early water loss and shrinkage cracking, improves compressive strength and strength retention rate, and enhances the utilization rate of bulk solid waste. It has the advantages of low carbon, alkali resistance, controlled release and strong engineering adaptability.
Smart Images
Figure CN122403833A_ABST