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Soundness of Cement01:17

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The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...
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  11. Characterization Of The Mechanical Behavior And Stabilization Mechanism Of Soft Soil Treated With Xanthan Gum Biopolymer

Characterization of the Mechanical Behavior and Stabilization Mechanism of Soft Soil Treated with Xanthan Gum Biopolymer

Qian-Feng Gao1, Xue-Ke Shi1, Ling Zeng2

  • 1School of Transportation, Changsha University of Science & Technology, Changsha 410114, China.

Polymers
|June 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Xanthan gum biopolymer effectively improves soft soil for highway engineering. It enhances unconfined compressive strength and compressibility, showing promise as an eco-friendly soil stabilizer.

Area of Science:

  • Geotechnical Engineering
  • Materials Science
  • Environmental Science

Background:

  • Soft soils present significant challenges in highway construction due to low strength and high compressibility.
  • Traditional soil stabilization methods can have environmental drawbacks.

Purpose of the Study:

  • To evaluate xanthan gum biopolymer as an eco-friendly agent for improving soft soil mechanical properties.
  • To investigate the effects of xanthan gum on unconfined compressive strength, compressibility, and durability under dry-wet cycles.

Main Methods:

  • Laboratory tests including unconfined compressive strength (UCS) and compressibility measurements.
  • Physicochemical analyses (pH, electrical conductivity, TDS) and microscopic tests to understand stabilization mechanisms.
Keywords:
soft soilsoil stabilizationstabilization mechanismunconfined compressive strength

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Main Results:

  • Xanthan gum significantly improved UCS and compressibility, with optimal results at 1.5% dosage.
  • Stabilized soil showed good durability under ten dry-wet cycles, with UCS dropping by only 24.1%.
  • Mechanism involves bonding and filling effects of xanthan gum hydrogel, reducing soil water content and void ratio.

Conclusions:

  • Xanthan gum is a promising and effective stabilizer for soft soils in highway engineering.
  • The biopolymer offers an environmentally friendly alternative for enhancing mechanical behavior and durability.
  • Optimized xanthan gum treatment leads to satisfactory performance for highway foundation materials.
xanthan gum