2results about How to "Appropriate setting time" patented technology

This invention discloses an early-strength, high-stability road grouting repair material and its preparation, belonging to the field of solid waste utilization and road grouting reinforcement technology. The raw materials of the early-strength, high-stability road grouting repair material of this invention include multi-source solid waste aggregates and a water-reducing agent; the multi-source solid waste aggregates, by mass percentage, include: 6.6 wt% fly ash, 5-15 wt% rapid-hardening sulfoaluminate cement, 64-74 wt% mineral powder, 13.4 wt% desulfurized gypsum, and 1% carbide slag. This invention constructs a quaternary solid waste system of fly ash-desulfurized gypsum-mineral powder-carbide slag, synergistically forming a slurry composite system with rapid-hardening sulfoaluminate cement and a water-reducing agent, and precisely controls the concentration of raw materials. During hydration, this system can generate supporting crystals, which not only provide high early-stage stone strength for the road grouting material, but also, due to its good stability, ensure high stone strength stability in the later stages.

The application provides a quick-setting magnesium oxychloride bone cement as well as a preparation method and application thereof. The raw material composition of the quick-setting magnesium oxychloride bone cement comprises a solid phase and a liquid phase; the solid phase comprises magnesium oxide, magnesium chloride, zinc chloride and strontium hydrogen phosphate; and the liquid phase is water. The mass ratio of zinc chloride to magnesium chloride is (1-2):(9-8); the mass of strontium hydrogen phosphate is 3-5 wt.% of the total weight of magnesium oxide, magnesium chloride and zinc chloride. The ratio of the total mass of zinc chloride and magnesium chloride to the mass of water is 1:11-17; and the ratio of the total mass of zinc chloride and magnesium chloride to the mass of magnesium oxide is 1:6-9. The composite magnesium oxychloride bone cement prepared by the application has a suitable setting time, is convenient for clinical operation, has a high compressive strength, meets the strength requirement of dense bone, and can be used for bone repair of load-bearing parts.