Abstract: This study explores the application of agricultural biomass fibers (wheat straw) in enhancing recycled cement-based materials for 3D-printed construction products. Recycled cement-based materials, characterized by rapid setting and hardening as well as excellent fire resistance, align with the low-cost and low-energy design principles of 3D printing technology. However, challenges such as poor crack resistance and insufficient lightweight characteristics persist. This study incorporated crop straw fibers into recycled cement-based materials at varying dosages (1.5%, 2%, and 3%). The effects of fiber content on material's printability, fluidity, mechanical properties, and microstructure were systematically investigated through experimental analysis. The macroscopic reinforcement mechanisms of straw fibers and their roles in the material's microstructure were elucidated. The results demonstrated that an appropriate addition of straw fibers significantly improved crack resistance and mechanical performance while reducing carbon emissions. Specifically, at a 1.5% dosage, wheat straw fibers increased the compressive and flexural strengths by 9.7% and 22.5%, respectively. The anisotropic impact of fiber incorporation on flexural strength was more pronounced than on compressive strength, with the highest compressive strength observed along the X-axis and the highest flexural strength along the Y-axis. Furthermore, the carbon emissions of straw-reinforced recycled cement-based materials were markedly lower than those of conventional cement-based materials, achieving a green and environmentally friendly effect. This approach provides a novel pathway for waste recycling and promotes the advancement of sustainable construction practices.
席歆玥, 张延生, 杨云波, 李焱, 徐宏殷, 王娟, 郑元勋. 绿筑智建:农业生物质纤维强化再生水泥3D打印绿色建材研究[J]. 材料导报, 2026, 40(5): 24080146-7.
XI Xinyue, ZHANG Yansheng, YANG Yunbo, LI Yan, XU Hongyin, WANG Juan, ZHENG Yuanxun. Green Construction Intelligence:Study on Strengthening Recycled Cement 3D Printing Green Building Materials with Agricultural Biomass Fibers. Materials Reports, 2026, 40(5): 24080146-7.
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2026, Vol. 40 
