Non Shrink Grout vs Epoxy Grout
Non shrink grout and epoxy grout are both used for grouting and load transfer in construction, but they differ significantly in composition, performance, and application areas. Understanding these differences helps engineers and contractors choose the correct grout for structural reliability and long-term durability.
What Is Non Shrink Grout?
Non shrink grout is a cementitious grout formulated to maintain its volume after setting.
- Compensates for shrinkage during curing
- Provides full contact with concrete and steel
- High compressive strength after curing
- Commonly used for structural and load-bearing applications
What Is Epoxy Grout?
Epoxy grout is a resin-based, two- or three-component system that hardens through a chemical reaction.
- Extremely high bond strength
- Excellent chemical and moisture resistance
- Very low shrinkage
- Used for precision and specialized applications
Key Differences Between Non Shrink Grout and Epoxy Grout
| Feature | Non Shrink Grout | Epoxy Grout |
|---|---|---|
| Base Material | Cementitious | Resin-based |
| Shrinkage | No shrink after curing | Negligible shrinkage |
| Bond Strength | Good | Very high |
| Chemical Resistance | Moderate | Excellent |
| Heat Resistance | Good | Limited at high temperatures |
| Cost | Economical | More expensive |
| Workability | Easy to mix and place | Requires skilled handling |
Where Non Shrink Grout Is Preferred
Non shrink grout is suitable for most general construction and heavy-load applications.
- Machinery base grouting
- Column base plates
- Anchor bolts and dowels
- Structural void filling
Where Epoxy Grout Is Preferred
Epoxy grout is used in applications requiring superior bonding or chemical resistance.
- High-precision machinery alignment
- Chemical plants and industrial floors
- Areas exposed to oils, acids, and solvents
- Rapid load return applications
Which Grout Should You Choose?
The selection depends on performance requirements and site conditions.
- Choose non shrink grout for structural support and economy
- Choose epoxy grout for chemical resistance and high bond strength
- Consider cost, installation skill, and exposure conditions
Frequently Asked Questions (FAQ)
1. Can epoxy grout replace non shrink grout?
Epoxy grout can replace non shrink grout in specific cases but is not economical for general use.
2. Is epoxy grout stronger than non shrink grout?
Epoxy grout has higher bond strength, while non shrink grout provides excellent compressive strength.
3. Which grout is better for machinery bases?
Non shrink grout is commonly preferred unless chemical resistance is required.
4. Does epoxy grout cure faster?
Yes, epoxy grout typically achieves faster strength gain.
5. Is epoxy grout suitable for outdoor use?
It can be used outdoors but may be sensitive to temperature and UV exposure.
Raltro
Raltro is a construction materials knowledge platform that focuses on explaining how different grouting systems perform under real site conditions. By comparing non shrink grout and epoxy grout in terms of strength, durability, cost, and application suitability, Raltro helps professionals select the right grouting solution for reliable structural performance and long-term service life.