Microscopic mechanism and predicting calculation on mechanical properties of basalt fiber modified 3D printing cement-based materials

Abstract

This study focuses on the modification and intelligent-digital control of 3D printing materials. Based on the significant effect of basalt fiber in improving toughness, the influence mechanism of basalt fiber substitution rate, length and other factors on the macroscopic properties and microstructure scores of 3D printing cement-based materials was explored. The results show that under the combined effect of basalt fiber length and content, the optimal improvement is achieved with 3 % content and 8 mm length, increasing the flexural strength and compressive strength by 10.21 % (28 days) and 13.11 % (28 days), respectively. And the structure has been optimised at the micro level with an increase in type II gels. Also further use of microdata, through data fusion and refined analysis, a model (R2 > 0.85, error < 10 %) and intelligent control method that can comprehensively and accurately predict the service performance of basalt fiber modified 3D printing cement-based materials are established, which provides new development ideas for the intelligent construction and design of future building structures.

Keywords

• 3D printed cement-based materials
• Basalt fibers
• Mechanical properties
• Multiscale model