Mini-Mason 3D Printing Orthoconcrete: Preparation, Properties, and Microstructure

IF 8.1 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of building engineering Pub Date : 2026-09-02 DOI:10.1016/j.jobe.2026.117261

Weiguo Shen, Jinyue Wang, Gelong Xu, Jiangtao Sun, Bo Tian, Zhitang Li, Zhe He, Haftamu Brhanu Amare, Michaele Alem Gebreyohannes, Guiming Wang

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引用次数: 0

Abstract

A novel Mini-Mason 3D printing concrete method is developed, representing an innovative approach to casting orthoconcrete. This method involves the layer-by-layer pouring of fluid mortar and coarse aggregate. The present study investigates the optimum volume fraction of coarse aggregate in fresh mortar and its influence on the mechanical and durability properties of hardened Mini-Mason concrete. The mechanism of this method is analyzed using microhardness testing, BSE imaging, and pore structure characterization. The findings indicate that the fluidity of the mortar is the primary parameter that governs the preparation of the concrete mixture. The mortar, with a fluidity of 400 mm, allows the maximum coarse aggregate volume fraction of 53.3% when using well-graded aggregate. Increasing the aggregate fraction enhances compressive strength, penetration resistance, and volumetric stability. The Mini-Mason method produces orthoconcrete, characterized by a uniform distribution of aggregate, thinner and harder interfacial transition zones (ITZs), and improved compactness due to reduced total porosity and fewer harmful pores.

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迷你梅森3D打印正形混凝土：制备，性能和微观结构

开发了一种新型的Mini-Mason 3D打印混凝土方法，代表了一种创新的浇筑正混凝土的方法。这种方法涉及流体砂浆和粗骨料的逐层浇筑。研究了新拌砂浆中粗集料的最佳体积分数及其对硬化小梅森混凝土力学性能和耐久性的影响。通过显微硬度测试、BSE成像和孔隙结构表征分析了该方法的机理。研究结果表明，砂浆的流动性是决定混凝土混合料配制的主要参数。砂浆的流动性为400 mm，当使用级配良好的骨料时，允许粗骨料的最大体积分数为53.3%。增加骨料分数可提高抗压强度、抗渗透能力和体积稳定性。Mini-Mason方法生产的正形混凝土具有集料分布均匀、界面过渡区（ITZs）更薄、更硬的特点，并且由于总孔隙率降低和有害孔隙减少而提高了密实度。

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来源期刊

Journal of building engineering Engineering-Civil and Structural Engineering

CiteScore

10.00

自引率

12.50%

发文量

1901

审稿时长

35 days

期刊介绍： The Journal of Building Engineering is an interdisciplinary journal that covers all aspects of science and technology concerned with the whole life cycle of the built environment; from the design phase through to construction, operation, performance, maintenance and its deterioration.