Effect of Zeolite Powder on Hydration Properties of Potassium Magnesium Phosphate Cement

Abstract

Abstract: In order to improve the hydration property of magnesium phosphate cement, potassium magnesium phosphate cement was prepared by replacing part of magnesium oxide with zeolite powder. The influence of adding zeolite powder on the basic properties of potassium magnesium phosphate cement was studied by combining setting time test, mechanical properties test, hydration heat, phase identification and micro-morphology analysis. The results show that the hydration setting time of potassium magnesium phosphate cement is extended to 10.17 min when the content of zeolite powder is 8% (mass fraction), but at the same time its 7 d compressive strength and flexural strength are reduced to 44.6 and 8.0 MPa. With the increase of zeolite powder content, the amount of K-type struvite decreases. When the content of zeolite powder is not exceed 12% (mass fraction), the total hydration heat of potassium magnesium phosphate cement increases, but further adding zeolite powder can reduce the magnesium oxide in potassium magnesium phosphate cement and the hydration heat of potassium magnesium phosphate cement.

Key words: potassium magnesium phosphate cement, zeolite, K-type struvite, setting time, mechanical property, hydration heat

CLC Number:

TQ172

DENG Yonggang, DAI Tingting, SUN Chen, YANG Yuanquan. Effect of Zeolite Powder on Hydration Properties of Potassium Magnesium Phosphate Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(9): 3083-3088.

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