Technical Guide
What is non-shrink grout used for?
Main uses of non-shrink grout for machine bases, steel column base plates, structural gaps, anchor bolts, and concrete repair.
Updated:
Direct answer
Non-shrink grout is used to fill load-bearing gaps while limiting shrinkage after hardening. Common applications include machine bases, steel column base plates, pedestal bases, gaps between concrete members, anchor bolts, void repair, and high-strength finishing zones. Selection should consider grout thickness, flow, working time, required strength, curing conditions, and formwork containment. Correct application is as important as product choice: the substrate must be clean, saturated surface dry when required, forms must be sealed, and placement should be continuous to avoid trapped air.
Key takeaways
- Use non-shrink grout where a filled gap must transfer load or reach high strength.
- Control mixing water, placement time, formwork, and curing to avoid voids, bleeding, or strength loss.
- The Bestmix Grouting - Bonding - Repairing - Finishing category is the right place to select by thickness and strength requirements.
Selection table
| Option | Best for | Note |
|---|---|---|
| Machine base or base plate | Stable load transfer | Requires good flow, sealed forms, and continuous placement. |
| Anchor bolts | Fixing steel details | Check embedment depth, hole cleaning, and hardening time. |
| Void repair | Honeycombed or underfilled concrete | Surface preparation and curing are critical. |
Common questions
Does non-shrink grout need curing?
Yes. Curing helps prevent early water loss, supports strength development, and reduces surface cracking risk.
Can extra water be added to improve flow?
Do not exceed the recommended water dosage. Excess water can cause bleeding, lower strength, and increase shrinkage risk.