ArticleMaterials (Basel, Switzerland)2023
Experimental Study on Different Improvement Schemes of EICP-Lignin Solidified Silt.
Article in Materials (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- Mechanistic study on the influence of organic matter on soil compressive strength and nonlinear resistivity.Scientific reports · 2026Article
- Study on Pore Water Pressure Model of EICP-Solidified Sand under Cyclic Loading.Materials (Basel, Switzerland) · 2024Article
- Experimental study on the mechanical properties of desert sand improved by the combination of additives and bio-cement.Bioprocess and biosystems engineering · 2024Article
- An experimental study on the curing of desert sand using bio-cement.Bioresources and bioprocessing · 2024Article
- Modified Lignin-Based Cement Solidifying Material for Improving Engineering Residual Soil.Materials (Basel, Switzerland) · 2023Article
- Liquefaction Potential of Saturated Sand Reinforced by Cement-Grouted Micropiles: An Evolutionary Approach Based on Shaking Table Tests.Materials (Basel, Switzerland) · 2023Article
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5 authors.
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Abstract
In practical engineering applications, silt is prone to liquefaction and quicksand. This paper mainly studies the improvement effects of urease, lignin and their mixture on the strength and liquefaction resistance of silt. Based on the results and phenomena of an unconfined compressive strength and dynamic triaxial test, the improvement effects of the compressive strength, deformation resistance and liquefaction resistance of silt under different improvement schemes are analyzed, and the optimal values of the cement or lignin when enzyme-induced calcium carbonate precipitation (EICP) technology, lignin alone or EICP and lignin are obtained. The results show that the optimum concentration of the constant temperature and humidity sample (referred to as the constant humidity sample) and the constant temperature immersion sample (referred to as the soaking sample) of urease in the unconfined compressive strength test is 1.0 mol/L, and the compressive strength of the soaking sample is 4.9 MPa, which is 1.56 times that of the constant humidity sample; the optimum addition ratio of the lignin-improved constant humidity sample is 3%, and its compressive strength is 2.07 Mpa; the optimum addition ratio of the samples immersed at constant temperature is 4%, and the compressive strength is 3.05 MPa; when urease combines with lignin to improve silt, 4% is the best lignin addition ratio, the compressive strength of the constant humidity sample reaches 1.57 Mpa and the compressive strength of the soaking sample reaches 3.75 MPa; in the dynamic triaxial multi-stage cyclic load test, all samples were cured at constant humidity sample, and in the urease modified silt scheme, 1.0 mol/L was the optimal cement concentration; in the scheme of improving silt with lignin, 3% is the optimal addition ratio; when 1.25 mol/L cementation solution plus urease crude extract is combined with different ratios of lignin in the experimental scheme, 3% is the best lignin addition ratio.
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