Digital concrete is advancing due to growing economic incentives for construction automation. Achieving more sustainable concrete construction requires carbon reduction, and digital concrete technologies enable material-saving designs. By decoupling production strength from design strength, two-component (2K) systems utilizing aluminate precipitation offer the most flexibility, allowing more sustainable mixes with higher substitution levels. However, 2K aluminate systems are complex and demand a deeper understanding of their chemistry and strength buildup. This article reviews the basics of 2K aluminate systems, specifically aluminum sulfate-based and calcium aluminate cement/calcium sulfate-based systems, and their use in an inline active mixing reactor. An example reaction engineering analysis predicts the degree of reaction in a given reactor design, relating it to yield stress. The two chemical systems are compared, and future research recommendations are provided.

中文翻译：

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数字混凝土中的铝化 2K 系统：工艺、设计、化学和前景


由于建筑自动化的经济激励不断增强，数字混凝土正在不断发展。实现更可持续的混凝土建筑需要减少碳排放，而数字混凝土技术可以实现节省材料的设计。通过将生产强度与设计强度分离，利用铝酸盐沉淀的双组分 (2K) 系统提供了最大的灵活性，允许具有更高替代水平的更可持续的混合物。然而，2K 铝酸盐系统很复杂，需要对其化学和强度构建有更深入的了解。本文回顾了 2K 铝酸盐系统的基础知识，特别是硫酸铝基和铝酸钙水泥/硫酸钙基系统，以及它们在在线主动混合反应器中的应用。反应工程分析示例可预测给定反应器设计中的反应程度，并将其与屈服应力相关联。对这两种化学系统进行了比较，并提供了未来的研究建议。