Mechanical behavior and strengthening mechanism of loess stabilized with xanthan gum and guar gum biopolymers

Materials Research Express, Journal Year: 2024, Volume and Issue: 11(10), P. 105305 - 105305

Published: Oct. 1, 2024

Abstract The structural properties of loess are susceptible to change when subjected external loads and complex environments, leading various geological disasters. To investigate the mechanical behavior strengthening mechanism stabilized with biopolymers such as xanthan gum guar gum, especially for soils low bearing capacity stability in engineering applications, we conducted research on improvement soil tests including unconfined compressive strength, disintegration, direct shear, microstructure were conducted. Among four different dosages (0%, 0.5%, 1%, 2%) curing ages (1 day, 3 days, 7 14 days), 2% content biopolymer days had greatest impact loess, Both shear well water solidified improve higher or prolonged time; however, disintegration rate decreases. Microscopic analysis indicates that effectively fill gaps between particles attach particle surfaces, forming fibrous reticular structures interparticle bonding ultimately increase strength loess. Xanthan can enhance erosion resistance water-holding capacity. These outcomes suggest have potential serve environmentally sustainable alternatives conventional stabilizers.

Language: Английский

Mix proportion test and engineering characteristics analysis of loess-based cement slurry material

Frontiers in Materials, Journal Year: 2025, Volume and Issue: 12

Published: May 2, 2025

To address the challenges of limited space, quality control issues, and ensuring stable self-compaction backfill materials in trench backfilling projects, a loess-based cement slurry was developed as flowable material by using loess primary base incorporating an appropriate amount admixture for solidification improvement. The permeability, collapsibility, disintegration were analyzed varying content curing age. slump test first conducted to determine optimal water contents, aiming 180 mm. Subsequently, compressive strength tested orthogonal experimental design. analysis revealed mix ratio slurry: 8% naphthalene sulfonate formaldehyde condensate, 3% sodium sulfate, 0.5% thiosulfate, 0.08% ethylene glycol. Experimental results indicated that with 4% content, exhibited maximum permeability coefficient 0.977 × 10 −5 collapsibility 0.865 −2 , confirming both meet required standards. When exceeds 6%, paste shows minimal collapse. This study offers efficient reliable technical solution operations regions.

Language: Английский