CBGM-EWT300 – Extended Working Time Grout for Structural Precision Applications
Ultra-High Strength Non-Shrink Cementitious Grout (Up to 70 MPa)
CBGM-EWT300 is a high-strength, extended working time grout designed for precision grouting of equipment foundations, anchor bolts, and structural elements.
Product Introduction
CBGM-EWT300 is a premium Extended Working Time Grout formulated for high-precision grouting applications where placement flexibility, dimensional stability, and high mechanical performance are critical. With a compressive strength reaching 70 MPa at 28 days, this non-shrink, cement-based grout is ideal for structural installations, equipment bases, and industrial foundations that demand reliability over an extended application window.
Its pumpable consistency, high flowability, and non-corrosive composition make it especially suited for large pours and congested spaces.
Grouting under heavy equipment and precision baseplates
Secondary grouting of steel columns and precast structural elements
Anchor bolt, dowel, and reinforcement bar embedment
Filling voids in structural concrete repairs
Large-scale industrial foundation grouting
Pumpable grouting in congested or deep applications (≥300 mm)
Clean all contact surfaces; remove laitance, oil, dust
Ensure surface is SSD (Saturated Surface Dry)
Use formwork where needed, coated with release agent
Mix with clean water as mentioned
Use paddle mixer (400–600 rpm) for 3 minutes
Avoid over-mixing or introducing air
Place within 60 minutes of mixing
Pour continuously to avoid cold joints
Use gravity feed or pump for deep/congested areas
Light rodding/vibration recommended if needed
Cover with plastic sheet or moist curing fabric immediately
Maintain temperature >5°C during curing
Use thermal insulation for cold weather
Product Parameters
| Property | Value | Standard / Method |
|---|---|---|
| Grout Type | Extended Working Time Grout | — |
| Initial Flowability | ≥300 mm | GB/T 50448 / ASTM C1437 |
| Flow Retention (30 min) | ≥260 mm | GB/T 50448 |
| 3h Vertical Expansion | 0.1–3.5% | GB/T 50448 / ASTM C827 Equivalent |
| 24h–3h Expansion Differential | 0.02–0.5% | GB Method |
| Compressive Strength | 1d ≥25 MPa 3d ≥40 MPa 7d ≥55 MPa 28d ≥70 MPa | GB/T 17671 / ASTM C109 |
| Initial Set Time | ≤4 hours | GB/T 1346 / ASTM C191 |
| Water Absorption | <0.1% | EN 13057 / ASTM C642 |
| Steel Corrosion Resistance | No corrosion | GB / EN 15183 |
| Fresh Density | ≈2.3 g/cm³ | ASTM C138 |
| Recommended Mixing Water | 13–14% (3.25–3.5 L per 25 kg bag) | Internal Standard |
Packaging: 25 kg moisture-resistant kraft paper bags
Shelf Life: 6 months (unopened, ≤30°C)
Storage Conditions: Store in dry, shaded, well-ventilated place
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Our products have undergone rigorous testing at our national testing laboratory (CABR testing center co., ltd). Renowned Fortune Global 500 firms such as China Railway Group Limited, China Communications Construction Company Limited, and Sinohydro are among our esteemed clients.
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