Method for synergistically preparing concrete admixture from multi-element solid wastes
By grinding and activating the product to generate nano-sized ferrohydrate and silica-alumina, the problem of low cementitious activity of steel slag and red mud in concrete is solved, achieving efficient resource utilization and improving the compressive strength and heavy metal solidification ability of concrete.
Patent Information
- Application Number
- CN202610363047.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-24
- Publication Date
- 2026-06-05
AI Technical Summary
When steel slag and red mud are used as solid wastes in concrete, they suffer from low cementitious activity, poor volume stability, and low utilization rate. In particular, due to the expansion and cracking caused by f-CaO and high alkalinity, as well as insufficient activity, they are difficult to utilize effectively in a synergistic manner.
By mixing and grinding steel slag, red mud, and calcium hydroxide, adjusting the pH value, adding buffer solution, performing vacuum stirring and oxygen introduction, and combining ultrasonic vibration activation curing, nano-sized ferrite and silicon-aluminum active products are generated, forming a composite admixture, which stimulates its gelation and chemical activity.
It significantly improves the compressive strength and heavy metal solidification ability of concrete, realizes the resource utilization of steel slag and red mud, reduces production costs, and enhances the mechanical properties and volume stability of concrete.