Performance optimization and experimental study of 3D printing rice straw fiber-reinforced cement-based composites
JIANG Demin
HU Siyu
KANG Honglong
HUANG Hongjia
NIU Guohang
Abstract：This study investigates the effects of rice-straw fiber diameter,sand-to-binder ratio(S/B)and superplasticizer dosage on the flowability,extrudability,buildability and mechanical performance of 3D printing rice straw fiber reinforced cement-based composites(3DPRSFCC).Results show that flowability decreases markedly with increasing fiber diameter,whereas it improves with higher S/B and superplasticizer content.An optimal balance is achieved with 0.6 mm-diameter fibers(3～5 mm long),S/B=1∶1 and 0.10%superplasticizer:under this mix the composite exhibits the best extrudability,buildability and mechanical properties,a low co-efficient of variation in printed filament width,and enables stable construction of a 10-layer hollow cylinder with a cumulative de-formation of only 31.5%.The corresponding 28-day flexural and compressive strengths reach 3.21 MPa and 5.20 MPa,respectively.The work provides reference for valorizing rice straw and for deploying rice straw fibers in 3D concrete printing.
Keywords：3D printingrice straw fibercement-based materialsprintabilitybuildability
Publication Date：2026-01-25
Online Publishing Date：2026-03-17(First online date of this platform, not the publication date of the document)
Pages：5( 48-52 )