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| Research on Relationship between Macroscopic Properties and Pore Sturcture of Phosphogypsum-based Material |
| HOU Jiaojiao** MEI Fuding |
| (Department of Engineering, China University of Geosciences, Wuhan 430074) |
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Cite this article:
HOU Jiaojiao** MEI Fuding. Research on Relationship between Macroscopic Properties and Pore Sturcture of Phosphogypsum-based Material. Chinese Journal of Materials Research, 2013, 27(6): 631-640.
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Abstract The relationships of multidimensional seepage about continuous phase, dispersion strengthening phase and decentralized deterioration phase of the phosphogypsum-based material’s space were described. The porosity, pore size distribution (PSD), characteristic pore size and specific surface area (SSA) of the samples were measured by mercury intrusion porosimetery (MIP). The effect of these parameters above mentioned on the compressive strength of system I and system II was investigated. The results show that a lower hydration extent by the limited water supply and high capillary tension contributed to form the pore path precolation and low compressive strength. There are two PSD peaks in the pore size ranges of 3-200 nm and 200 nm-8 μm for all the samples. The pore-percolation changed by dosage of raw materials and specific strength reduce with increasing the water-cement ratio and the relationship among specific strength, shape factors and volume fraction follow roughly the power law, that is . This model, , exhibited certain superiorities in fitting the correlation and compensated for the perdiction about value and the actual value for different pore structure of several existing models.
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| Fund: Supported by Teaching Project Foundation of Laboratory in China University of Geosciences No.SKJ2012140. |
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