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Properties and reaction mechanisms of magnesium phosphate cement mixed with acetic acid

  • Structural Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

Objective

This study aims to improve the coagulation time, strength, and construction cost of magnesium phosphate cement.

Methods

We analyzed the microstructure changes in the hardened magnesium phosphate cement paste through qualitative analysis, quantitative test, microscopic examination, and research regarding adding different concentrations of acetic acid on magnesium phosphate cement slurry time, effects of flow resistance, and mechanical properties.

Results

When a moderate amount of AA was used, the setting time of MAPC mortar was significantly prolonged but was later reduced as the concentration increased. In the early phase, the degree of MAPC mortar hydration increased, whereas compressive strength significantly increased initially and increased slowly in the later phase. The crystal morphology and size of MAPC hydrates changed, and hardened MAPC became more compact in structure. The AA absorbed some ammonia in the MAPC condensation.

Conclusion

Acetic acid can effectively regulate coagulation time, induce early hydration reaction rate, and improve the performance of magnesium phosphate cement, which can reduce the construction cost of magnesium phosphate cement.

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Correspondence to Yong-sheng Ji.

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Li, J., Ji, Ys., Huang, Gd. et al. Properties and reaction mechanisms of magnesium phosphate cement mixed with acetic acid. KSCE J Civ Eng 22, 231–235 (2018). https://doi.org/10.1007/s12205-017-1408-x

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  • DOI: https://doi.org/10.1007/s12205-017-1408-x

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