26/02/2026
It looks like you’re demonstrating earthen spheres—possibly CSEB soil mix test balls or clay/lime composite samples—and even showing their handling strength.
From the images, a few technical observations:
1. Raw earthen balls (uncoated)
Brown soil balls of different diameters placed for drying.
Some show minor surface cracks and uneven texture, which indicates:
Slightly high clay content, or
Insufficient fiber/sand stabilizer, or
Drying too fast in direct sun.
2. Finished coated spheres
The polished spheres with smooth finish and colored bases suggest:
Lime wash, natural resin, or cement-lime slurry coating.
Good surface densification and improved durability.
3. Strength demonstration
Holding and throwing pose indicates compressive integrity and cohesion.
If they remain intact after handling, the mix has adequate binding, likely from:
Lime stabilization
Cement (5–10%)
Or natural binders (cow dung, jaggery water, etc.)
Engineering feedback (for CSEB / earthen construction use)
Recommended mix ratio (typical for stabilized soil blocks/balls):
Soil: 70–75%
M-sand / coarse sand: 20–25%
Cement: 5–8% (or Lime 8–12% as alternative)
Water: just enough for plastic consistency
To improve quality:
Add more sand if cracks appear.
Add lime for long-term strength and water resistance.
Shade cure 7–14 days, avoid direct sun first 48 hours.
Apply lime wash or casein coating for durability.
