Study on fractal characteristics of pores of NAS reinforced by MICP under the control of electric field

Li, Jun; Ma, Jie; Tong, Youdong; E, Fei; Zhang, Zhendong

doi:10.1016/j.conbuildmat.2020.121540

Cited by 9 publications

(1 citation statement)

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“…As illustrated, CaCO 3 crystals generated by MICP mineralization are mostly distributed on sand particle surfaces, in sand particle pores, and between sand particles to achieve covering, filling, and cementing effects [ 25 ]. In the process of MICP mineralization, bacteria are first adsorbed on the surface of aeolian sand particles, providing nucleation sites for the formation and superposition of CaCO 3 crystals [ 26 ]. The CaCO 3 crystals deposit, accumulate, and grow between adjacent particles to cement the adjacent particles into a whole, turning the point contact between particles into surface contact and improving the overall stability of the samples.…”

Section: Resultsmentioning

confidence: 99%

Experimental Study on the Wind Erosion Resistance of Aeolian Sand Solidified by Microbially Induced Calcite Precipitation (MICP)

Qu,

Li,

et al. 2024

Materials

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Microbially induced calcite precipitation (MICP) is an emerging solidification method characterized by high economic efficiency, environmental friendliness, and durability. This study validated the reliability of the MICP sand solidification method by conducting a small-scale wind tunnel model test using aeolian sand solidified by MICP and analyzing the effects of wind velocity (7 m/s, 10 m/s, and 13 m/s), deflation angle (0°, 15°, 30°, and 45°), wind erosion cycle (1, 3, and 5), and other related factors on the mass loss rate of solidified aeolian sand. The microstructure of aeolian sand was constructed by performing mesoscopic and microscopic testing based on X-ray diffraction analysis (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). According to the test results, the mass loss rate of solidified aeolian sand gradually increases with the increase in wind velocity, deflation angle, and wind erosion cycle. When the wind velocity was 13 m/s, the mass loss rate of the aeolian sand was only 63.6%, indicating that aeolian sand has excellent wind erosion resistance. CaCO3 crystals generated by MICP were mostly distributed on sand particle surfaces, in sand particle pores, and between sand particles to realize the covering, filling, and cementing effects.

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Section: Resultsmentioning

confidence: 99%