Frost resistance is the ability of crushed stone to withstand repeated freeze–thaw cycles without significant loss of mass or structure damaging, while maintaining surface integrity.

Why it matters

Each crushed stone piece has micro cracks that can absorb water. When temperatures drop below zero, the water freezes and expands, leading to the gradual destruction of the stone from the inside. As a result, road surfaces and base layers can deform, and walling material surfaces can begin to crumble.

Therefore, high quality crushed stone must withstand the number of freeze–thaw cycles rated in GOST 32826-2014, GOST 3344-83, and GOST 5578-2019 State Standards. This requirement is particularly important for:

·        Road construction (base layers and asphalt concrete mixes),

·        Construction of load-bearing structures and foundations.

Frost resistance classification

Frost resistance is indicated by the letter F (for freeze) and a grade – 50, 100, 150, 200, 300, or 400. The grade shows the guaranteed number of freeze–thaw cycles a moisture-saturated sample can withstand.

Crushed stone frost resistance

Metallurgical crushed stone typically has a frost resistance grade from F150 to F200. This means the material can withstand 150–200 freeze–thaw cycles without a significant loss of strength or breakdown. Grade F150 is standard for most fractions and is widely used in road construction and concrete structures in mild climate conditions.

Key factors behind high frost resistance of crushed stone

Chemical composition. Metallurgical crushed stone is a manufactured stone material containing high levels of calcium, silicon, aluminum, and magnesium oxides. When exposed to water (for example, in concrete), these components can undergo hydration, forming strong, durable crystalline bonds. Its composition is similar to that of silicate cements, which supports resistance to aggressive environmental conditions and seasonal temperature fluctuations.

No clay and organic impurities. High quality metallurgical crushed stone contains minimal amounts of harmful impurities and dust, which can otherwise reduce strength and frost resistance of the finished material.

Low water absorption. Due to its porous structure, the manufactured stone absorbs water well and easily drains it into the underlying layers. As a result, less moisture remains within the pore spaces at sub-zero temperatures, reducing internal freeze damage.

Production process. High frost resistance is linked to the material’s origin and manufacturing technology. Unlike many sedimentary rocks, metallurgical crushed stone is formed at temperatures of up to 1,500°C and then quenched. This process helps create a dense structure with high resistance to external impacts.

NLMK blast furnace F150–F200 frost resistance grades crushed stone is a reliable choice for construction projects in mild and cold climates. The material is available in a range of size fractions, as well as in crushed stone and sand mixes. Key advantages include high strength, good compaction in structural layers, strong bonding properties, and a competitive cost compared with natural aggregate.

Need help selecting the right crushed stone for your project conditions? Please contact Andrey Ryabov, Head of Bulk Products Development. He will guide you in selecting the optimal grade and size fraction for your application.

 +7 (980) 192-88-89
ryabov_am2@nlmk.com

For more information about the properties and applications of NLMK bulk materials, please visit a dedicated section on our portal.