Effect of pH value on the growth and properties of magnesium phosphate cement paste with a large water-to-solid fraction
Source abstract
Abstract
In this study, the effect of pH value, a neglected but important factor of magnesium phosphate cement (MPC) pastes, was investigated to generate new ideas in the field of large water-to-solid (w/s) fraction MPC preparation. To avoid the introduction of impurities, the pH value was controlled by adjusting the proportions of diammonium hydrogen phosphate (DAP) and ammonium dihydrogen phosphate (ADP). The results showed that the ADP:DAP ratio had strong effects on the setting characteristics, mechanical properties, phase composition and microstructures of the MPC pastes. Regarding the mechanical properties in particular, the variation curve of compressive strength (up to 28 d) exhibited a salient wave peak, which was tremendously different from the variation of the MPC pastes with a low w/s fraction. A speculative theory with a reasonable interpretation is thus proposed.
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Research context
OpenAlex topics: Magnesium Oxide Properties and Applications · Layered Double Hydroxides Synthesis and Applications · Electromagnetic wave absorption materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
PhD student, Department of Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, P. R. China
Associate Professor, Department of Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, P. R. China (corresponding author: )
Junior Researcher, Shandong Tianju Geotechnical Engineering Technology Co. Ltd, Jinan, P. R. China
Senior Researcher, Shandong Tianju Geotechnical Engineering Technology Co. Ltd, Jinan, P. R. China
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