Research on the Mechanical Properties and Salt-Freezing Resistance of Nano-Silica Modified MPC

ZHOU Le; WANG Fanxu; ZHAO Tongfeng; LI Lei

doi:10.3724/j.gyjzG24031314

Volume 55 Issue 4

Apr. 2025

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2025 > 55(4): 180-186

ZHOU Le, WANG Fanxu, ZHAO Tongfeng, LI Lei. Research on the Mechanical Properties and Salt-Freezing Resistance of Nano-Silica Modified MPC[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(4): 180-186. doi: 10.3724/j.gyjzG24031314

Citation:

ZHOU Le, WANG Fanxu, ZHAO Tongfeng, LI Lei. Research on the Mechanical Properties and Salt-Freezing Resistance of Nano-Silica Modified MPC[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(4): 180-186. doi: 10.3724/j.gyjzG24031314

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Research on the Mechanical Properties and Salt-Freezing Resistance of Nano-Silica Modified MPC

doi: 10.3724/j.gyjzG24031314

ZHOU Le^1,2,
WANG Fanxu^1,2,
ZHAO Tongfeng^{3
,
,},
LI Lei³

1. School of Architectural Engineering, Shenyang University, Shenyang 110044, China;
2. Shenyang University Engineering Structure Safety Assessment and Prevention and Control Laboratory, Shenyang 110044, China;
3. Liaoning Traffic College Road and Bridge Engineering Department, Shenyang 110122, China

Received Date: 2024-03-13
Available Online: 2025-06-07
Publish Date: 2025-04-01

Abstract

Abstract

Magnesium phosphate cement （ MPC ） was modified by nano-silica （ NS ）. A set of mix proportions with excellent performance was proposed by compressive strength tests， flexural strength tests and setting time tests， and the microstructure and phase composition of modified MPC specimens were analyzed. The effects of NS on the salt-freezing resistance of MPC were further explored， and the compressive strength， flexural strength and mass loss of modified MPC after being subjected to freeze-thaw cycles were tested. The results showed that NS could effectively improve the compressive and flexural strength of MPC， and the effect of adding 2% NS was the best， especially the early strength. NS could enhance the salt-freezing resistance of MPC， reduce the mass loss and the strength reduction. It could be seen from the microscopic analysis that NS intervened in the hydration process of MPC， filling the voids inside the MPC sample， thereby enhancing the compactness of the sample.
- nano-silica,
- magnesium phosphate cement,
- strength,
- salt-freezing resistance

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References

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