气候变化领域集成服务门户(CCPortal): Influence of Xanthan Gum-Based Soil Conditioners on the Geotechnical Properties of Soils

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DOI	10.3390/app14104044
	Influence of Xanthan Gum-Based Soil Conditioners on the Geotechnical Properties of Soils
	Fortuna, Barbara; Logar, Janko; Sorze, Alessandro; Valentini, Francesco; Smolar, Jasna
发表日期	2024
EISSN	2076-3417
起始页码	14
结束页码	10
卷号	14 期号:10
英文摘要	The impact of climate change has become increasingly severe in forests, where droughts and strong winds on the one hand and extreme rainfall events on the other hand can damage forest ecosystems. To mitigate the effects of drought and enhance soil water retention capacity, three types of soil conditioners (SCs), labeled SC_R, SC_CG, and SC_ZZC, were developed as part of the European project ONEforest. All the conditioners are based on Xanthan gum and have different types and amounts of fillers with diverse cellulose fiber lengths. These can offer the potential to optimize the SC characteristics, e.g., water absorption, water retention, and mechanical stability. This paper focuses on the influence of fillers in the SCs on the geotechnical properties of forest soils from Ljubelj in the Alpine part of Slovenia (S1), Catalonia, northeastern Spain (S2), and Heldburg, Germany (S3). The results show an increase of 53% to 100% in the water absorption of treated soil. A less favorable impact of the SCs was found on the drained shear strength and the compressibility. The drained shear strength of untreated forest soils in a saturated state was S1 c ' = 4.4 kPa, phi ' = 33.5 degrees; S2 c ' = 1.4 kPa, phi ' = 30.0 degrees; and S3 c ' = 12 kPa, phi ' = 28.0 degrees. The addition of SCs results in a reduction in the drained shear strength of saturated mixtures. The reduction depends on the dosage of added SC-whether it is a low (L) or a high (H) dosage. For instance, when the soil S1 was treated with a low dosage of the soil conditioner SC_R, it demonstrated a cohesion (c ') of 11 kPa and a friction angle (phi ') of 27.0 degrees. However, increasing the dosage of the SC_R led to a decrease in both the cohesion and the friction angle for the same soil (c ' = 7.7 kPa, phi ' = 25.0 degrees). Additionally, the type of soil conditioner also impacts the drained shear strength. Among the mixtures with a high dosage of the SC_R, SC_CG, or SC_ZZC, those containing the SC_CG with the longest fibers stand out, demonstrating the highest friction angle. Therefore, longer fibers can be a promising component of the SCs to reduce the negative influence of XG on the mechanical properties of treated soils.
英文关键词	soil conditioners (SCs); xanthan gum; forest soils; mixtures; compressibility; shear strength; liquid limit; plastic limit; water absorption; hydraulic conductivity
语种	英语
WOS研究方向	Chemistry ; Engineering ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Engineering, Multidisciplinary ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:001233112900001
来源期刊	APPLIED SCIENCES-BASEL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305797
作者单位	University of Ljubljana; University of Trento; University of Trento
推荐引用方式 GB/T 7714	Fortuna, Barbara,Logar, Janko,Sorze, Alessandro,et al. Influence of Xanthan Gum-Based Soil Conditioners on the Geotechnical Properties of Soils[J],2024,14(10).
APA	Fortuna, Barbara,Logar, Janko,Sorze, Alessandro,Valentini, Francesco,&Smolar, Jasna.(2024).Influence of Xanthan Gum-Based Soil Conditioners on the Geotechnical Properties of Soils.APPLIED SCIENCES-BASEL,14(10).
MLA	Fortuna, Barbara,et al."Influence of Xanthan Gum-Based Soil Conditioners on the Geotechnical Properties of Soils".APPLIED SCIENCES-BASEL 14.10(2024).