Aluminate 2K systems in digital concrete: Process, design, chemistry, and outlook

IF 10.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Cement and Concrete Research Pub Date : 2024-08-20 DOI:10.1016/j.cemconres.2024.107644

Timothy Wangler, Yaxin Tao, Arnesh Das, Matineh Mahmoudi, Seyma Gürel, Robert J. Flatt

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Abstract

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.

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数字混凝土中的铝酸盐 2K 系统：工艺、设计、化学和展望

由于建筑自动化的经济激励因素不断增加，数字混凝土技术也在不断进步。要实现更可持续的混凝土施工，就必须减少碳排放，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，允许使用替代等级更高的可持续混合料。然而，2K 铝酸盐系统非常复杂，需要对其化学性质和强度形成有更深入的了解。本文回顾了 2K 铝酸盐体系的基本知识，特别是硫酸铝基和铝酸钙水泥/硫酸钙基体系，以及它们在在线主动混合反应器中的应用。反应工程分析实例可预测特定反应器设计中的反应程度，并将其与屈服应力联系起来。对两种化学体系进行了比较，并提出了未来的研究建议。

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来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.