Work

Characterization and properties of porous red mud–based geopolymer composites reinforced with carbon fiber powders

Year: 2024

Type: article

Abstract: To obtain porous composites with high porosity and improved performance, porous geopolymer composites (CFP/RMG) were fabricated using alkali-excited red mud and carbon fiber powders (CFPs) using the foaming method. The synergistic effects of CFPs and H 2 O 2 on the microstructure, pore structure , strength, and thermal properties of the porous samples were systematically investigated. CFPs were uniformly distributed on the pore walls of the samples. The total porosity decreased with CFPs and increased with H 2 O 2 , the density of CFP/RMG samples ranged from 0.57 ± 0.01 to 1.71 ± 0.05 g/cm 3 . The compressive strength of the composite samples increased from 0.54 ± 0.09 to 4.16 ± 0.24 MPa with an increase in CFPs from 0 to 12.5 wt%, and it decreased from 4.06 ± 0.23 to 0.47 ± 0.06 MPa with 1–5 wt% H 2 O 2 . Fiber bridging and fiber pullout contributed to the strength reinforcement of the whole composite. The porous composites also showed low thermal conductivity (0.176–0.680 W/(m·K)), which revealed that it had potential applications in the field of building materials in the future.

Source: Diamond and Related Materials

DOI: 10.1016/j.diamond.2024.111531

Authors: Shu Yan, Wenguang Wang, Chenyang He, Xuexin Gai, Shengwei Wang

Institution: Northeastern University

Language: English

Topic: Concrete and Cement Materials Research

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Responsible consumption and production, Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $2,610