FND concrete mixes are specially formulated for use in foundations where the ground conditions are chemically aggressive—particularly in soils with high sulfate content. These mixes are engineered to deliver enhanced durability, long-term strength, and resistance to chemical attack, making them suitable for both reinforced and unreinforced foundation applications. They are commonly used in footings, ground beams, and shallow strip foundations for residential, commercial, and industrial projects
Each FND grade (e.g. FND2, FND3, FND4) corresponds to a specific level of sulfate resistance, determined by the Design Chemical (DC) class of the soil. For example, FND2 is suitable for standard aggressive conditions, while FND3 and FND4 are used in more extreme environments such as brownfield sites or areas with known chemical contamination. These mixes typically feature higher cement content and lower water-cement ratios to ensure structural integrity and longevity