CEMENT GP 20 kg
General Purpose (GP) Cement – 20 kg bag provides a reliable, versatile binding agent conforming fully to Australian Standard AS3972 Type GP requirements. Manufactured locally, this cement ensures consistent quality and performance, making it ideal for a wide range of applications.
Key Properties & Compliance
- Meets all AS3972 specifications for general purpose and blended cements.
- Typical performance (per Cement Australia data):
- Initial setting time: 60–150 minutes (min. 45 minutes)
- Final setting time: max. 6 hours
- Soundness: <3 mm (max. 5 mm)
- Compressive strength: ≈30–42 MPa (3 days), 43–54 MPa (7 days), 54–65 MPa (28 days)
Ideal Applications
GP Cement is designed to serve as a cementitious binder for:
- Concrete, mortar, render, grout
- Foundations, driveways, slabs, footpaths, pavers
- Structural projects, mining applications, civil works, and general domestic building needs.
Mix Guidance
Recommended volume-based examples (from Cement Australia):
Application | Cement : Sand : Aggregate |
Concrete – general use | 1 : 2.5 : 4 |
Concrete – paths, driveways | 1 : 2 : 3 |
Concrete – foundations | 1 : 3 : 3 |
Mortar (general purpose) | 1 : 4 |
Render | 1 : 3 |
Packaging & Storage
- Supplied in 20 kg multi‑wall paper sacks, with bulk options (500 kg, 1 tonne) available.
- Storage: Store off the ground, in dry conditions—exposure to moisture may cause premature hydration and reduce usability. Bagged cement older than 6‑12 months may degrade in performance.
Compatibility & Handling
- Compatible with supplementary cementitious materials like fly ash (AS 3582.1) and ground granulated blast furnace slag (AS 3582.2), and with chemical admixtures in accordance with AS 1478.
- Use clean water, accurately measure constituents, and apply appropriate curing (water spray, wet sand or polyethylene cover for at least seven days) to optimise strength and durability.
- Safety: Highly alkaline. Avoid dust inhalation (use masks), protect skin and eyes (goggles, gloves), and clean equipment promptly after use.
The CEMENT GP 20 kg from Singh Roofing Supplies is a robust, standards-compliant general-purpose Portland cement. With proven strength development, broad compatibility, convenient packaging, and clear handling guidelines, it is perfectly suited for both domestic and professional building tasks requiring dependable results.