Work

The synergistic effect of silica fume and γ-C2S on the carbonation resistance of supersulfated cement

Year: 2026

Type: article

Abstract: The poor carbonation resistance of supersulfated cement (SSC) is one of the key bottlenecks limiting its engineering applications. This paper investigates the synergistic effect of γ-C 2 S and silica fume (SF) on improving the carbonation resistance of SSC. The results show that γ-C 2 S can improve the compressive strength of SSC both before and after carbonation, and the strength improvement effect is more significant for the samples with both γ-C 2 S and SF. γ-C 2 S can reduce the porosity of SSC after 14 days of carbonation from ∼36% to ∼32%. SF can enhance the carbonation reaction degree of γ-C 2 S, strengthen the carbonation reinforcement effect, and reduce the porosity of carbonated SSC to ∼27%.This study provides a new method for improving the carbonation resistance of SSC. In addition, the promoting effect of SF on the carbonation reaction of γ-C 2 S also contributes to a new idea for improving the mechanical properties of γ-C 2 S-based carbonation-strengthened materials. • The combination of SF and γ-C 2 S improves the carbonization resistance of SSC; • The combination of SF and γ-C 2 S lowers the porosity of carbonated SSC; • The SF can promote the carbonation enhancing effect of γ-C 2 S in the hardened SSC.

Source: Developments in the Built Environment

DOI: 10.1016/j.dibe.2026.100868

Authors: Yuanxian Gong, Zhongxu Song, Binbin Liu, Guilong Sun, Guanglong Sun, Heng Chen

Institutions: Universiti Sains Malaysia, University of Jinan

Language: English

Topic: Concrete and Cement Materials Research

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,230

Funders: National Natural Science Foundation of China, Natural Science Foundation of Shandong Province, National Key Research and Development Program of China