Top 5 Types of Non Shrink Grout Explained
Non shrink grout is not a single, one-size-fits-all material. It is available in different types, each designed to meet specific construction and industrial requirements. Selecting the correct type of non shrink grout ensures proper load transfer, dimensional stability, durability, and long-term performance. Below are the top 5 commonly used types of non shrink grout, explained in simple and practical terms.
1. Flowable Non Shrink Grout
Flowable non shrink grout is designed to spread easily under gravity and fill narrow gaps without vibration.
Key Characteristics
- High flow and self-leveling properties
- Maintains volume after curing
- Excellent for tight and congested spaces
Common Uses
- Machinery base plates
- Large steel base plates
- Precast concrete seating
- Bridge bearings
2. Plastic (General Purpose) Non Shrink Grout
Plastic non shrink grout has a thicker consistency that allows controlled placement without flowing away.
Key Characteristics
- Moderate flow with good workability
- Easy to place and finish
- Good balance between strength and handling
Common Uses
- Column base grouting
- Anchor bolt pockets
- Structural void filling
- General construction grouting
3. High Strength Non Shrink Grout
High strength non shrink grout is formulated to handle heavy static and dynamic loads.
Key Characteristics
- Very high compressive strength
- Excellent load transfer capability
- Minimal creep under sustained load
Common Uses
- Heavy machinery foundations
- Industrial equipment bases
- High-load anchor bolts
- Critical structural connections
4. Rapid Hardening Non Shrink Grout
Rapid hardening non shrink grout is designed for applications where early strength gain is required.
Key Characteristics
- Fast setting and early strength development
- Reduces downtime on site
- Controlled expansion despite rapid curing
Common Uses
- Emergency repair works
- Machinery installation with tight schedules
- Traffic and infrastructure repairs
- Shutdown maintenance projects
5. Pumpable Non Shrink Grout
Pumpable non shrink grout is specially designed to be placed using grout pumps over long distances.
Key Characteristics
- Stable flow under pumping pressure
- No segregation during pumping
- Uniform strength throughout placement
Common Uses
- Large foundations and raft grouting
- Hard-to-access grouting locations
- Mass grouting works
- Industrial and infrastructure projects
How to Choose the Right Type of Non Shrink Grout
Selecting the correct grout type depends on application and site conditions.
- Choose flowable grout for tight gaps and precision work
- Use plastic grout for controlled placement and vertical areas
- Select high strength grout for heavy loads
- Use rapid hardening grout when time is critical
- Opt for pumpable grout for large or inaccessible areas
Why Using the Correct Type Matters
Using the wrong grout type can cause serious performance issues.
- Voids and incomplete filling
- Reduced load transfer
- Cracking and shrinkage problems
- Premature failure of grouted elements
Frequently Asked Questions (FAQ)
1. Can one type of grout be used for all applications?
No, each type is designed for specific performance and placement needs.
2. Is flowable grout always the best option?
No, excessive flow may cause leakage or segregation in some applications.
3. Can pumpable grout be placed manually?
Yes, but it is optimised for pumping large volumes.
4. Does high strength grout reduce shrinkage?
High strength grouts still rely on shrinkage-compensating additives.
5. Who decides which grout type to use?
The engineer or project specification usually determines the grout type.
Raltro
Raltro is a construction materials knowledge platform focused on clarifying product selection for real construction challenges. By explaining the different types of non shrink grout, how they behave during placement, and where each type performs best, Raltro helps engineers, contractors, and site professionals avoid incorrect material selection and achieve reliable, long-term grouting performance across residential, commercial, and industrial projects.