3D打印再生砂浆早期流变性能及结构经时演化研究

doi:10.11896/cldb.22100157

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Abstract In order to further explore the applicability of recycled mortar in 3D printing technology, this work studies the mortar with different replacement rates of recycled sand. The development process of flow/thixotropy of recycled mortar in the early stage is analyzed, digital image technology is used to collect and analyze the deformation of 3D printed specimens under static load. The results show that with the progress of hydration reaction, the recycled mortar shows a rapid growth trend of static yield stress and thixotropic ring area. The static yield stress of 20 min is 1.47 times that of natural mortar, showing better constructability. Under static load, the loss of vertical mutation height and creep of recycled mortar printed specimens are significantly smaller. It is about 0.5 times that of natural mortar printed specimens, according to the apparent characteristics of recycled sand, the evolution mechanism of flow/thixotropy of recycled mortar during hydration is revealed. The deformation of 3D printed specimen under static load is analyzed from the aspects of material properties and 3D printing time structure gap, which provides theoretical support for the application of recycled mortar in 3D printing.

Key words： 3D printing recycled mortar early performance rheology strength evolution

Published: 10 May 2024 Online: 2024-05-13

CLC number:

TU528

Fund:Thirteenth Five-Year National Key Research and Development Plan(2019YFC1907105), the National Natural Science Foundation of China (51878546, 52178251), the Shaanxi Provincial Outstanding Youth Science Fund Project (2020JC-46), the Key Research and Development Projects of Shaanxi Province (2020SF-392), the Yulin City Industry-University-Research Science and Technology Plan Project(CXY-2020-062), and the Innovative Talent Promotion Plan of Shaanxi Province (2018KJXX-056).

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	Articles by authors
	LIU Chao
	MENG Yisheng
	WU Yiwen
	LIU Huawei

Cite this article:

LIU Chao,MENG Yisheng,WU Yiwen, et al. Study on Early Rheological Properties and Structure Evolution of 3D Printed Recycled Mortar[J]. Materials Reports, 2024, 38(9): 22100157-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22100157 OR http://www.mater-rep.com/EN/Y2024/V38/I9/22100157

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