11
Penatech GP Grout: A Technical Overview
Penatech GP Grout is a Class C, high strength, cementitious precision grout designed for structural grouting under dynamic loads. Its dual expansion mechanism compensates shrinkage in both plastic and hardened states, ensuring long-term stability. Engineered for machine base plates, crane rails, bridge bearings, precast concrete, and anchor bolts, it delivers high early and ultimate compressive strengths with exceptional flow retention. The non-metallic formulation eliminates staining, while compliance with ASTM C1107-91 and CRDC 621-82A provides specification confidence for critical installations.
Core Features & Specifications
- High early & ultimate strength: >30 MPa at 1 day; >80 MPa at 28 days (trowellable).
- Shrinkage-compensated with dual expansion in plastic & hardened states.
- Exceptional flow retention: ensures full void filling and precision placement.
- Non-metallic, chloride-free — eliminates staining and corrosion risk.
- Application temperature range: 5–30 °C.
- Mixing water: 2.2–4.0 L per 20 kg (depending on consistency).
- Yield: ~10.2–11 L per 20 kg bag; density ~2220–2200 kg/m³.
- Bond strength >7–8 MPa (28 days, slant shear test).
- Suitable for gravity pour or pumped placement.
The Penatech GP Grout Advantage
- Confidence under vibration and load: high dynamic resistance.
- Meets international Class C non-shrink grout standards (ASTM, CRDC).
- Flexibility of placement: dry pack, plastic/trowellable, or flowable/pourable.
- Long-term performance: no bleed, no segregation, high thermal & impact resistance.
Frequently Asked Questions
What applications is Penatech GP Grout suitable for?
It is designed for machine base plates, crane rails, bridge bearings, anchor bolts, precast concrete, and critical grouting applications where high early strength and shrinkage compensation are required:contentReference[oaicite:1]{index=1}.
How much water should be added per 20 kg bag?
Depending on the consistency required: • Dry Pack: 2.2–2.6 L • Plastic/Trowellable: 2.8–3.2 L • Flowable/Pourable: 3.5–4.0 L:contentReference[oaicite:2]{index=2}.
What are the typical compressive strengths?
>30 MPa at 1 day, >60 MPa at 3 days, >70 MPa at 7 days, >80 MPa at 28 days (trowellable):contentReference[oaicite:3]{index=3}.
How should substrates be prepared?
Substrates must be clean, sound, and pre-soaked for ≥4 hours. Remove free water before grouting. Ensure formwork is watertight and grout head is maintained:contentReference[oaicite:4]{index=4}.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Machine base plates & heavy machinery foundations | High strength, shrinkage compensated, resists vibration | Engineers, Builders, Industrial Contractors |
| Crane rail sole plates & bridge bearings | Dynamic load resistance, high ultimate strength | Structural Contractors, Infrastructure Specialists |
| Anchor bolts, cavities, core holes | Non-shrink, excellent adhesion, void-free filling | Builders, Remedial Contractors |
| Precast sections & panel connections | Precision placement, flowable/pumpable consistency | Precast Installers, Concreters |
Applying Penatech GP Grout: Enhanced Protocols & Best Practices
-
Substrate & Formwork Preparation
Clean and saturate substrate with water for ≥4 h. Ensure no free water remains. Construct watertight formwork with bleed/vent holes. Coat formwork with release oil:contentReference[oaicite:4]{index=4}.
Pro Tip: Maintain a grout head during placement to avoid air voids under plates. -
Mixing
Add grout powder to pre-measured clean water. Mix mechanically for 3–5 min to homogeneous consistency. Do not hand mix. Typical water per 20 kg: • Dry pack: 2.2–2.6 L • Trowellable: 2.8–3.2 L • Flowable: 3.5–4.0 L:contentReference[oaicite:5]{index=5}.
Pro Tip: Never add water beyond range—excess water causes segregation & strength loss. -
Placement
For base plates: pour from one side using gravity/headbox method to avoid air entrapment. For large volumes: pump from bottom up using a positive displacement pump. Always maintain grout head:contentReference[oaicite:6]{index=6}.
-
Curing
Immediately protect exposed grout from evaporation, wind and sunlight. Cover with wet hessian, plastic, or apply curing compounds (e.g., Curecon range). Curing is critical to strength development:contentReference[oaicite:7]{index=7}.
Limitations & Safety
Product Limitations
- Do not apply below 5 °C or above 30 °C without conditioning water/material:contentReference[oaicite:8]{index=8}.
- Never add excess water; leads to segregation, bleeding and reduced strength.
- Not suitable for unrestrained areas—confined formwork is required.
- Not designed for feather-edging; maintain minimum 10 mm thickness under plates.
- Low temp (<10 °C) delays setting and early strength; high temp (>30 °C) accelerates setting.
Safety & Handling Requirements
- Wear gloves, safety glasses, protective clothing; avoid skin & eye contact.
- Use in well-ventilated areas; avoid inhaling dust during mixing (P2 respirator recommended).
- Non-flammable; store sealed in dry, low humidity conditions. Shelf life 9 months:contentReference[oaicite:9]{index=9}.
- First Aid: • Eyes: rinse with water, seek medical advice. • Skin: wash with soap & water. • Inhalation: move to fresh air. • Ingestion: rinse mouth, do not induce vomiting, seek medical care.
Penatech GP Grout Application Guide
Concrete & Precast Sections
Surface Preparation
Substrates must be clean, sound and free of dust, oil, grease, curing compounds or contaminants. Mechanically clean if required. Pre-soak the substrate with clean water for a minimum of 4 hours. Remove all free water immediately prior to grouting:contentReference[oaicite:1]{index=1}.
Primer Requirements
Primer not required
Ensure surfaces are pre-soaked and in a saturated-surface-dry (SSD) state. No standing water should remain.
Base Plates & Machine Footings
Formwork Preparation
Construct watertight, leakproof formwork using foam strips or suitable sealant (polyurethane/silicone) under edges. Provide bleed/vent holes when grouting confined areas. Coat formwork with release oil for easier removal:contentReference[oaicite:2]{index=2}.
Primer Requirements
Primer not required
Maintain grout head via formwork or header box to ensure gravity flow without air pockets.
Anchor Bolts & Core Holes
Preparation
Ensure all holes are clean and dry, free from standing water. Pre-soak porous substrates then remove excess water. Place grout from one side to avoid air entrapment:contentReference[oaicite:3]{index=3}.
Primer Requirements
Primer not required
- Choosing a selection results in a full page refresh.