Eco-friendly ۳D Printing Mortar with Low Cement Content: Investigation on Printability and Mechanical Properties

Publish Year: 1403
نوع سند: مقاله ژورنالی
زبان: English
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JR_CEJ-10-3_010

تاریخ نمایه سازی: 2 اردیبهشت 1403

Abstract:

The conventional approach to achieving optimal printability and buildability in ۳D printing mortar relies heavily on cement, which is both costly and environmentally detrimental due to substantial carbon emissions from its production. This study aims to mitigate these issues by investigating the viability of slag as a partial substitute for cement, with the goal of developing an eco-friendly alternative. The newly formulated mortar, featuring a ۳۰% reduction in cement content (from ۸۳۰ to ۵۸۱ kg/m۳) and the inclusion of ۰.۱۰% micro-fibers, exhibits properties comparable to conventional ۳D printing mortar. The research is structured into two parts: Part ۱ focuses on determining the optimal fiber content, while Part ۲ delves into the investigation of fiber-reinforced mortar with reduced cement content for ۳D printing. Criteria were established to ensure mortar flow at ۱۱۵%, initial printable time below ۶۰ minutes, and ۷-day compressive strength exceeding ۲۸ MPa. Part ۱ results indicate that a fiber content of ۰.۱% by volume meets the specified requirements. In Part ۲, it was observed that increasing the slag replacement percentage extended the initial printable time and time gap. However, even at a ۳۰% replacement rate, the initial printable time remained within the acceptable range, partially attributed to the presence of fibers in the mix. Additionally, higher slag content led to increased flow and reduced filament height in the mixes. Notably, all formulations surpassed the ۷-day compressive strength threshold. These findings underscore the potential of slag as a sustainable alternative to cement in ۳D printing fiber-reinforced mortar, offering promising prospects for environmentally friendly construction practices. Doi: ۱۰.۲۸۹۹۱/CEJ-۲۰۲۴-۰۱۰-۰۳-۰۱۰ Full Text: PDF

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