Boral Blue Circle Grey Cement

Boral Blue Circle Grey Cement is a high-performance, general-purpose Portland cement designed for a wide range of building and construction needs. Exceeding the stringent requirements of Australian Standard AS 3972 for Type GP cement, this product delivers reliable results in both residential and commercial projects. Ideal for applications where chemical attack is not a concern, it is commonly used in concreting, mortaring, rendering, grouting, and screeding.

Key features include consistent grey color for uniform finishes, compatibility with admixtures compliant to AS 1478.1, and the option to blend with other AS 3972-compliant cements or fly ash per AS 3582.1 for customized properties. Available in convenient packaging options such as 20kg, 5kg, and 2kg bags, bulk bags, or bulk cement, it suits projects of any scale from DIY landscaping to major infrastructure.

Technical specifications highlight its exceptional performance:

• Compressive Strength: Achieves 25-38 MPa at 3 days, 36-51 MPa at 7 days (minimum 35 MPa required), and 54-64 MPa at 28 days (minimum 45 MPa required).
• Setting Time: Initial set in 1.5-3.0 hours (minimum 45 minutes), final set in 2.5-4.0 hours (maximum 6 hours).
• Soundness: 1.0 mm (maximum 5.0 mm allowed).
• Fineness: 330-4320 m²/kg.

For optimal results, follow recommended mix designs:

• General mortar (M3): 1 part cement, 6 parts sand, 1 part hydrated lime.
• Severe exposure mortar (M4): 1 part cement, 4.5 parts sand, 0.5 parts hydrated lime.
• General rendering: 1 part cement, 4 parts sand, 0.5 parts hydrated lime.
• Concrete for foundations/footings: 1 part cement, 3 parts sand, 5 parts stone/gravel.
• General use concrete: 1 part cement, 2.5 parts sand, 4 parts stone/gravel.
• Higher strength concrete: 1 part cement, 2 parts sand, 3 parts stone/gravel.

Store in a cool, dry, sealed environment off the ground to prevent moisture exposure, which can reduce shelf life—dispose of products older than 12 months. Safety precautions are essential: Avoid dust inhalation with P2 masks, use gloves and goggles, and wash off skin contact immediately. Contains trace Respirable Crystalline Silica and hexavalent chromium; refer to the Safety Data Sheet for full details.

Choose Boral Blue Circle Grey Cement for durable, high-strength outcomes in your next project, backed by Australia’s trusted leader in construction materials.