Effect of Modification on Properties of 3D Printing Rice Straw Fiber Cement-Based Composite

doi:10.16552/j.cnki.issn1001-1625.2025.0622

Abstract

Abstract:

To explore the application of plant fibers in 3D printing cement-based materials， this study used rice straw fiber as an additive and investigated the modification effects of boiling treatment and potassium permanganate solution treatment on rice straw fiber， as well as their impact on the performance of 3D printing rice straw fiber cement-based composite. The results show that boiling treatment makes fiber surface clean and rough but increases their water absorption.Potassium permanganate solution treatment reduces water absorption while increasing surface roughness and crystallinity. Both modification methods significantly improve the mechanical properties， the interlayer bonding strength and interstrip bonding strength of 3D printing rice straw fiber cement-based composites， with the potassium permanganate modification superior. This work offers new idea for design and performance optimization of 3D printing rice straw fiber cement-based materials and broadens the application of rice straw fiber in the construction field.

Key words: 3D printing, rice straw fiber, cement-based material, mechanical property, microscopic appearance, modification treatment

CLC Number:

TU528.58

JIANG Demin, HU Siyu, KANG Honglong, LI Yujin, HOU Yuxiang. Effect of Modification on Properties of 3D Printing Rice Straw Fiber Cement-Based Composite[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(1): 47-57.

Figures/Tables 15

Fig.1 Particle size distribution curves of cement， fly ash and silica fume

Table 1 Main chemical composition of cement and mineral admixtures

Material	Mass fraction/%
Material	CaO	SiO₂	Al₂O₃	Fe₂O₃	TiO₂	MgO	SO₃	Na₂O	Loss on ignition
OPC	62.38	25.52	6.15	3.27	0.57	1.54	1.65	0.21	2.87
FA	5.60	43.00	23.00	2.50	—	0.95	0.80	—	3.10
SF	0.60	86.57	0.96	0.56	—	0.34	—	0.99	3.92

Table 2 Particle grading of sand

Item	Mass fraction/%
Item	4.75 mm	2.36 mm	1.18 mm	0.60 mm	0.30 mm	0.15 mm
Divide sieve surplus	5.4	0.9	3.8	10.6	36.5	61.4
Cumulative sieve residue	5.4	6.3	10.1	20.7	47.1	97.9

Table 3 Chemical composition of rice straw fiber

Composition	Moisture	Ash	Holocellulose	Cellulose	Pentosans	Lignin
Mass fraction /%	5.06	15.35	62.41	39.27	17.93	17.35

Table 4 Mix proportion of 3D printing rice straw fiber cement-based composite materials

Composition	OPC	FA	SF	Water	Sand	Fiber	HPMC	Water reducer
Mix proportion/（g·L^-1）	976	260	65	781	1 302	45	1	1

Fig.2 Continuous 24 h water absorption rate of rice straw fiber

Fig.3 Tensile strength of rice straw fiber

Fig.4 FTIR spectra of rice straw fiber

Fig.5 TG and DTG curves of rice straw fiber

Fig.6 XRD patterns of rice straw fiber

Fig.7 Crystallinity of rice straw fiber

Fig.8 SEM images of rice straw fiber

Fig.9 Flexural strength and compressive strength of 3D 结合强度和条间结合强度 printing rice straw fiber cement-based composite

Fig.10 Interlayer bonding strength and interstrip bonding strength of 3D printing rice straw fiber cement-based composite

Fig.11 SEM images of 3D printing rice straw fiber cement-based composite

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