In this study, a precarbonation process of cement paste was developed using a power ultrasound-assisted mixing method to prepare a highly reactive seedings admixture, which was subsequently added to the remaining cement paste for secondary mixing. The results revealed that power ultrasound greatly facilitated the release of ions from the cement into the pore solution, promoting the formation of calcium carbonate, aluminum hydroxide and C–S–H gels. After the 20 min ultrasound treatment, a substantial quantity of very fine seedings was observed, capturing 7.09 wt% CO of the total cement used. These seedings also acted as nucleation sites to accelerate further cement hydration, which shortened the hydration induction period and ultimately formed a more homogenous, denser cement microstructure.

中文翻译：

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功率超声辅助混合下原位预碳酸化制备反应性晶种：增强 OPC 的水合作用和机械性能


本研究开发了一种水泥浆预碳化工艺，采用功率超声辅助搅拌方法制备高反应性的晶种掺合料，随后将其添加到剩余的水泥浆中进行二次搅拌。结果表明，功率超声极大地促进了离子从水泥中释放到孔隙溶液中，促进了碳酸钙、氢氧化铝和C-S-H凝胶的形成。 20 分钟超声波处理后，观察到大量非常细的晶种，捕获了所用水泥总量的 7.09 wt% CO。这些晶种还充当成核位点，加速水泥的进一步水化，缩短了水化诱导期，最终形成更均匀、更致密的水泥微观结构。