3D printing of high-volume fly ash mixtures for digital concrete construction

Panda, Biranchi

doi:10.32657/10356/93583

Cited by 1 publication

(1 citation statement)

References 179 publications

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“…This enhancement can be attributed to the finer particles introduced by slag, which enhance packing and consequently bolster strength [27]. Additionally, the increased slag content fosters pozzolanic reactions, wherein it reacts with calcium hydroxide in the presence of water to form additional cementitious compounds, augmenting overall strength [29]. Comparing the compressive strength values between perpendicular and parallel loading directions reveals a noteworthy disparity.…”

Section: Time Gapmentioning

confidence: 99%

Eco-friendly 3D Printing Mortar with Low Cement Content: Investigation on Printability and Mechanical Properties

Sukontasukkul,

Komkham,

Jamnam

et al. 2024

Civ Eng J

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The conventional approach to achieving optimal printability and buildability in 3D 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 30% reduction in cement content (from 830 to 581 kg/m3) and the inclusion of 0.10% micro-fibers, exhibits properties comparable to conventional 3D printing mortar. The research is structured into two parts: Part 1 focuses on determining the optimal fiber content, while Part 2 delves into the investigation of fiber-reinforced mortar with reduced cement content for 3D printing. Criteria were established to ensure mortar flow at 115%, initial printable time below 60 minutes, and 7-day compressive strength exceeding 28 MPa. Part 1 results indicate that a fiber content of 0.1% by volume meets the specified requirements. In Part 2, it was observed that increasing the slag replacement percentage extended the initial printable time and time gap. However, even at a 30% 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 7-day compressive strength threshold. These findings underscore the potential of slag as a sustainable alternative to cement in 3D printing fiber-reinforced mortar, offering promising prospects for environmentally friendly construction practices. Doi: 10.28991/CEJ-2024-010-03-010 Full Text: PDF

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Section: Time Gapmentioning

confidence: 99%