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Study on Microporosity, Mechanics and Service Life Prediction Model of Aeolian Sand Powder Concrete
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Study on Microporosity, Mechanics and Service Life Prediction Model of Aeolian Sand Powder Concrete
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Journal Article
Study on Microporosity, Mechanics and Service Life Prediction Model of Aeolian Sand Powder Concrete
2023
Overview
Taking aeolian sand powder concrete as the research object, this study uses nuclear magnetic resonance, nanoindentation and scanning electron microscope to explore its micropore, mechanical and morphological characteristics and establishes the correlation between the micromechanical parameters, pore parameters and pore diameter and the relative dynamic elastic modulus of aeolian sand powder concrete. According to the gray system theory, the gray prediction model of service life of aeolian sand powder concrete based on carbonization is established. The results show that the hardness in micromechanical properties and the porosity in pore parameters have great effects on the deterioration damage process of aeolian sand powder concrete and ordinary concrete, but the effects of pores with different pore diameters are different, Harmless holes < 20 nm have a great impact on ordinary concrete, and less harmful holes between 20 nm and 50 nm have a great impact on aeolian sand powder concrete. The corrosion resistance of aeolian sand powder concrete surface is intact, while the ordinary concrete pores are damaged to varying degrees. The goodness of fit between the gray prediction model of carbonation in the service life of aeolian sand powder concrete and the measured results reaches 0.9883, which meets the requirements.
