Culvert bags

High-Strength, Cost-Effective Concrete Solution for Erosion and Structural Control

Mastermix Culvert Bags are a high-strength, cost-effective solution designed for fast initial set and full cure within 28 days. Each 25kg bag is easy to handle and delivers efficient coverage of approximately 17–19 bags per m². Our bags are trusted and regularly used by industry leaders such as Fulton Hogan, Higgins, Fletcher Construction, Forest Management NZ Ltd., Forest Owner Marketing Services, Downer NZ Ltd, and numerous local authorities.

Specifications

Special concrete mix in 25kg polypropylene bags
Size: L400mm × W300mm × H100mm
Coverage: Approximately 17–19 bags per m² 40 bags per pallet
Low UV resistance (designed for fast breakdown)
Tested Strength: 20MPa (7 days), 30MPa (28 days)
Independent test results available on request
Also available in eco-friendly hessian bags

PRODUCT SUMMARY

‘Armor’ has been tested and conforms to AS/NZS4020-2005, these tests include Taste, Turbidity, Aquatic Micro Organism growth, Cytotoxic activity, Mutagenic activity and Extraction of metals. For further information please contact our Technical Department for a full copy of the test report.

Adhesion >1 Mpa Compressive Strength 14.7MPa
Flexural Strength 6MPa Residual Strength 11.26MPa
Shrinkage 0.005% Acid Resistance Very high when immersed at pH0

Armor is a cement based product and contains no additional
aggressive products. See packaging for full details.

Armor should be applied in temperatures between 7°C and 25°C applies to both substrate and ambient) and will remain workable up to 20 minutes at 20°C. Temperature, humidity and water content will affect the workability time. Armor should not be applied in temperatures below 7°C.

Although the technical details and recommendations Contained in this document correspond to the best of our knowledge and experience, all the above information must in every case be taken as merely indicative and subject to confirmation after long term practical applications.
For this reason, anyone who intends to use the product must ensure, beforehand, that it is suitable for the envisaged  application. In every case, the user alone is fully responsible for any consequences deriving from the use of the product.

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