Abstract
The Yellow River silt (YRS) is commonly used as construction material to address lack of sand resource. However, the YRS has the shortcoming of poor mechanical characteristic. Hence, in current study, enzyme-induced calcite precipitation (EICP) and microbial-induced calcite precipitation (MICP) techniques were adopted as the reinforce measures for the purpose of promoting the engineering properties of YRS. Among various factors that may influence the solidification effect, concentration of cement solution C and the number of grouting times N were selected for emphatical inspecting. Technical measures including unconfined compressive strength (UCS) test, the CaCO3 content test, and scanning electron microscope (SEM) were utilized to assess the solidification effect with different biotreatment technology. The results show that the YRS samples solidified with EICP technology can reach higher UCS and CaCO3 content. Compared to MICP technology, EICP technology is more capable of enhancing the geotechnical properties of YRS. The findings of this study can make contribution to the resource utilization of YRS.
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Acknowledgements
The work present in this paper was supported by National Natural Science Foundation of China (52178369; 52109140); Excellent Youth Fund of Henan Natural Science Foundation (232300420064); Central Plains Science and Technology Innovation Leader Project (234200510014); Project of Science and Technology Department of Henan Provincial Department of Transportation (2022-5-5); Youth Talent Promotion Project of Henan Province (2021HYTP016); Key Specialized Research and Development Breakthrough in Henan Province (212102310977); China Postdoctoral Science Foundation (2019M662533). These financial supports are gratefully acknowledged.
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Wang, Y., Wang, Z., Chen, H., Cao, T., Chen, Y. (2024). Comparative Analysis of Reinforcement Parameters on Yellow River Silt Solidified by MICP and EICP Technology. In: Hazarika, H., Haigh, S.K., Chaudhary, B., Murai, M., Manandhar, S. (eds) Sustainable Construction Resources in Geotechnical Engineering. IC-CREST 2023. Lecture Notes in Civil Engineering, vol 448. Springer, Singapore. https://doi.org/10.1007/978-981-99-9227-0_1
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