Published by: ADT Industries, Date: 5th January 2026

Introduction

Conbextra GP is a high-performance, shrinkage-compensated grout formulated for critical grouting applications. Supplied as a ready-to-use dry powder, it only requires clean water to produce a flowable grout. Ideal for gap thicknesses from 10mm to 100mm, this product ensures high early strength, durability, and dimensional stability.

Features

  1. • Non-shrink formulation for structural integrity: Conbextra GP ensures volume stability during setting and curing, preventing shrinkage cracks and ensuring long-term load transfer and bonding.
  2. • High early and ultimate strength: Designed to achieve strong early compressive strength, it supports quick turnaround and delivers lasting structural support under high stress.
  3. • Free-flowing consistency for easy application: Its smooth, flowable nature allows for easy placement in confined areas without the need for mechanical vibration.
  4. • Controlled expansion in the plastic state: Chemical additives ensure uniform expansion before setting, filling voids and preventing settlement or bleeding.
  5. • Low water demand for enhanced durability: Requires minimal water to achieve flowability, reducing porosity and improving long-term durability and strength.
  6. • Chloride-free – safe for use with reinforced steel: Formulated without chlorides, it prevents corrosion of embedded reinforcement, making it ideal for structural applications.

Step-by-Step Application Method

  1. • Surface Preparation: Ensure the grouting area is clean, free from oil, dust, and loose debris. Pre-soak the substrate with water to achieve a saturated surface-dry condition for better bonding.
  2. • Mixing: Gradually add the grout powder into clean, measured water and mix thoroughly for 3–5 minutes using a mechanical mixer until a smooth, lump-free, and flowable consistency is achieved.
  3. • Placing: Pour or pump the mixed grout continuously into the prepared gap or formwork, avoiding air entrapment to ensure complete contact and support.
  4. • Curing: Begin curing immediately after the initial set to prevent premature moisture loss. This enhances strength development and prevents surface cracking.

Health & Safety

  1. • Use gloves, a mask, and goggles during mixing and application.
  2. • Avoid prolonged skin contact.
  3. • Ensure adequate ventilation in enclosed spaces.
  4. • Store in a dry place away from direct sunlight.
  5. • Dispose of packaging according to local regulations.

Technical Information

Property Specification
Appearance Grey powder
Water / Powder Ratio 0.14 – 0.16 (by weight)
Flowability 20 – 30 sec (ASTM C939)
Working Time @ 30°C 30 – 45 minutes
Initial Set Time (ASTM C191) ~5 hours
Compressive Strength @ 28 Days ≥ 60 MPa

Conclusion

Conbextra GP is a trusted solution for high-precision grouting applications, offering superior flow, early strength, and dimensional stability. Whether for machine base plates or precast elements, it delivers unmatched performance.

Call To Action

  1. • Website: ADT INDUSTRIES
  2. • Email ID: helpdesk@adtchemical.com
  3. • Mobile No: +91 8080098992
  4. • Technical Support: Available for project consultations and on-site training.
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