Abstract

The physical and technological properties of the 3D construction printing material are formulated. It is shown that the composition should have unique rheological characteristics, controlled setting time, high adhesion, and fast strength. It is determined that a similar material with the required properties can be obtained by creating a composite material based on two active substances: a cementing material and a polymer binder, on one hand, and modification of the particles surface with a superplasticizer, on the other hand. The regularities of the influence of organic components (polymer binder and oligomeric superplasticizer) on the cement matrix are obtained. The mortar mobility, setting time, strength characteristics, and microstructure of the polymer–cement mortar are investigated. A patented composition of the composite material is developed for the innovative construction industry based on Portland cement and polyvinyl acetate dispersion. By modifying the phase boundary of the colloidal system, the proposed composite has the required plastic strength, high setting rate, high fast strength, crack resistance, and a number of other properties necessary for 3D printing of large-sized products and off-formwork structures.

中文翻译：

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设计水泥基3D建筑印刷材料的成分

摘要

制定了3D建筑打印材料的物理和技术特性。结果表明，该组合物应具有独特的流变特性，可控制的凝固时间，高附着力和快速强度。已经确定，可以通过基于两种活性物质创建复合材料来获得具有所需性能的相似材料：一方面是胶凝材料和聚合物粘合剂，另一方面是使用超塑化剂对颗粒表面进行改性。手。获得了有机组分（聚合物粘合剂和低聚高效减水剂）对水泥基体影响的规律性。研究了聚合物水泥砂浆的砂浆迁移率，凝结时间，强度特性和微观结构。基于波特兰水泥和聚乙酸乙烯酯分散体，为创新建筑行业开发了复合材料的专利组合物。通过修改胶体体系的相界，所提出的复合材料具有所需的塑性强度，高凝固速率，高快速强度，抗裂性以及大型产品和非模板结构的3D打印所需的许多其他性能。