Λεπτομέρειες βιβλιογραφικής εγγραφής
| Τίτλος: |
EICP Surface Spraying Reinforcement of Yan'an Q3 Loess: Optimization and Pore-Scale Mechanism. |
| Συγγραφείς: |
Wang, Xueyan, Dong, Guojie, Yuan, Yili, Yang, Tao, Wang, Bo, Liu, Mengyuan |
| Πηγή: |
Buildings (2075-5309); Jul2026, Vol. 16 Issue 13, p2484, 15p |
| Θεματικοί όροι: |
Soil stabilization, Loess, Surface preparation, Response surfaces (Statistics), Environmental protection |
| Γεωγραφικοί όροι: |
China |
| Περίληψη: |
Surface erosion of loess slopes in arid and semi-arid regions of China remains a critical geotechnical issue, requiring green and low-carbon stabilization techniques. This study investigated the effectiveness of enzyme-induced carbonate precipitation (EICP) for the surface spraying reinforcement of Q3 loess collected from a high-fill engineering site at Yan'an University. Single-factor tests, response surface methodology (RSM), surface strength tests, CT-based three-dimensional pore reconstruction, and scanning electron microscopy (SEM) were conducted to evaluate the effects of cementation solution concentration and spraying dosage. The cementation solution was prepared by mixing analytical-grade urea and anhydrous calcium chloride at a 1:1 molar ratio, and the specimens were compacted to a dry density of 1.4 g/cm3. The results showed that surface strength first increased and then decreased with increasing cementation solution concentration and spraying dosage. Spraying dosage had a more pronounced influence than cementation solution concentration; excessive spraying above 9 L/m2 reduced surface strength because of the high water sensitivity of loess. Five replicate tests at the central point were conducted to evaluate experimental error. The optimal parameters were 1.5 mol/L for cementation solution concentration and 9 L/m2 for spraying dosage. CT and SEM results showed that CaCO3 precipitation filled large pores and cemented soil particles, reducing total porosity from 6.7% to approximately 4.0%. These findings indicate that EICP improves loess surface strength mainly through pore filling and particle cementation, providing guidance for the ecological protection of loess slopes. [ABSTRACT FROM AUTHOR] |
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| Βάση Δεδομένων: |
Complementary Index |