Hot-humid, saline-groundwater piles in South China: 72 h stable
A coastal plant foundation in South China hit 35‰ saline groundwater and hot, humid weather. The slurry flocculated out within 4 hours, forcing three slurry changes per shift with heavy idle time.
Project overview
- Region
- South
- Project type
- Industrial plants
- Project scale
- Coastal industrial plant piles in 35‰ saline groundwater and hot, humid conditions
Construction challenges
The main construction challenges encountered on this project.
Challenge 1Salt degradation
35‰ groundwater broke the polymer — slurry flocculated out within 4 hours.
Challenge 2Heat loss
Hot, humid conditions stretched exposure, accelerating fluid loss and destabilising levels.
Challenge 3Wavering indices
Salt plus heat swung slurry readings, undermining consistent holes.
Solution & materials
Materials and mix ratios used step by step on this project, for reference by similar works.
| Stage | Material | Function | Ratio / dosage |
|---|---|---|---|
| Base slurry | BENT-N | Salt-tolerant base | 6%–8% |
| Salt resistance | HDS-9 SeaShield | Anti-degradation | 0.5%–0.8% |
| Rheology | CMC-N | Viscosify & control loss | 0.3%–0.5% |
| Maintain | Compound top-up | Tune per shift tests | As required |
Implementation notes
Adding HDS-9 SeaShield and CMC-N kept circulation stable through the salt and heat: viscosity and fluid loss stayed in spec for 72 straight hours, slurry changes fell to one fifth of the previous rate, and every pile passed inspection first time.
Delivered results
Site photos
Related products
NPT-HDS-9- Salt tolerance ≥ 35‰
- Prevents seawater flocculation
- Reduces bentonite dosage
NPT-CMC-N- High-viscosity grade
- Dissolves fast
- Low ash content
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