Preparation and mechanical properties of Portland cement composites filled with bamboo fibres modified by acetic acid and fermentation treatment

Abstract

To improve the compatibility between Portland cement and bamboo fibre, bamboo fibres were modified by acetic acid and fermentation treatment and the modified bamboo fibres/Porland cement composites were prepared. The hydration curves of the bamboo fibres/Porland cement composites were measured and the area ratio under the cement hydration heat curve was used as the compatibility coefficient to evaluate the compatibility of bamboo fiber and cement. The hydration products at different hydration times were characterized by XRD, FTIR, and SEM. Moreover, the mechanical strengths of standard test blocks of Portland cement/bamboo fibre composites were tested to further verify the improved compatibility of bamboo fiber and Portland cement. The study shows that the compatibility between bamboo fibre and Portland cement was improved from 9% to 87%, the bending strength of Portland cement/bamboo fibre composite was increased from 638 N to 3678 N, and the compressive strength was increased from 1.5 MPa to 34.35 MPa.

Keywords:

• Portland cement
• bamboo fibre
• acetic acid treatment
• fermentation treatment
• phase suitability
• hydration reaction

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This study was financial supported by the Project funded by the National Natural Science Foundation of China (No.32171882), the Science and Technology Innovation Program of Hunan Province of China (2021RC4062) and Scientific Research Project of Hunan Provincial Department of Education (20K143). This study was financially supported by the Postgraduate Scientific Research Innovation Project of Hunan Province (project name: Study on preparation and properties of bamboo fibre cement hollow board. CX20230761), and the Scientific Innovation Fund for Post-graduates of Central South University of Forestry and Technology (project name: Study on preparation and properties of bamboo fibre cement hollow board).