Sodium Silicate Chemical Grouting Agent
CAS Number: 1344-09-8
Sodium silicate (water glass) solution is a classic chemical grouting agent used in ground improvement and concrete treatment. When mixed with a reactant such as calcium chloride or sulfuric acid, it undergoes rapid gelation to form a rigid silica gel that binds soil particles, waterproofs formations, and seals cracks. It is widely used in underpinning, foundation strengthening, and tunneling through water-bearing soils.
Technical Specifications
| appearance | Clear to slightly hazy viscous liquid |
| Na2O content (%) | 7–9 |
| SiO2 content (%) | 26–30 |
| specific gravity | 1.35–1.40 |
| modulus (SiO2/Na2O ratio) | 2.4–3.4 |
Applications
- Soil stabilization and ground improvement
- Foundation underpinning through loose soils
- Tunneling through water-bearing sandy formations
- Concrete floor surface hardening (dilute application)
- Sealing porous masonry and concrete walls
Key Features
- Rapid gelation with reactant allows controlled setting in soil and rock
- Wide range of modulus grades for different viscosity and strength requirements
- Low cost and widely available worldwide
- Can be formulated as single-shot or two-component grouting system
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