A groundbreaking study has emerged from Khalifa University of Science and Technology that could redefine the landscape of 3D-printed construction materials. Led by Mohd Mukarram Ali, researchers have explored the innovative use of date syrup-based graphene-coated sand hybrid (D-GSH) as a partial sand substitute in cement composites. This development not only enhances the quality of 3D printing but also significantly improves the mechanical properties of the materials used, signaling a potential shift in the construction sector.
The research highlights that the incorporation of just 0.5% D-GSH can lead to impressive improvements. For instance, the variance in thickness of double layers during the printing process dropped from 38% to 28%, illustrating enhanced printing precision. “Our findings demonstrate that D-GSH not only improves the flowability of the mixture but also extends the open time, allowing for better buildability,” Ali noted. The study recorded a remarkable 116% increase in buildability, with an open time of 27 minutes—attributes that could streamline construction processes and reduce project timelines.
From a mechanical perspective, the results are even more striking. The addition of D-GSH resulted in an increase of 62% in compressive strength, 118% in flexural strength, and a 40% boost in elastic modulus after just 28 days of curing, outperforming traditional mixes that include silica fume. This enhancement in strength and durability is crucial for the construction industry, where the longevity and resilience of materials are paramount.
Microstructural analysis further reveals that D-GSH plays a vital role in reinforcing the cement matrix. It effectively fills gaps, bridges cracks, and bonds with hydration products, which translates to a more robust and reliable material. “The hybrid not only improves the mechanical properties but also contributes to a more sustainable construction approach by utilizing natural materials,” Ali explained.
The implications of this research extend beyond mere academic interest. In a sector increasingly focused on sustainability and efficiency, the use of D-GSH could pave the way for more eco-friendly construction practices. By reducing reliance on conventional materials and enhancing the performance of 3D-printed structures, this innovation aligns with the industry’s goals of lowering carbon footprints and optimizing resource use.
As the construction sector continues to evolve, the insights from this study published in ‘Developments in the Built Environment’ (translated to English as ‘Advancements in the Built Environment’) could serve as a catalyst for future research and development. The potential for commercial applications is vast, and with further exploration, D-GSH could become a staple in the toolkit of construction professionals.
For more information on this pioneering research, you can visit the lead_author_affiliation.
