How to Choose Crushed Stone for Construction: Complete Guide

Crushed stone is one of the most important construction materials. The durability and longevity of any structure directly depends on choosing the right material. In this article, we'll explain how to select the right crushed stone for your project.

Why Selection Matters

Many beginners think crushed stone is just "rocks." However, each fraction and strength grade has its specific purpose.

Using the wrong material can lead to foundation cracks or rapid road deterioration. Proper selection saves money and prevents future headaches.

Strength Grades

The strength grade is the key quality indicator. It's marked with M followed by a number indicating compression strength.

Classification by strength:

• M200-M400 — low strength crushed stone. Suitable for temporary roads, backfill, and simple drainage.
• M600-M800 — medium strength. Widely used for road works with moderate loads.
• M1000-M1200 — high-strength crushed stone. Our standard for foundations and concrete production.
• M1400-M1600 — ultra-strong material. Used in bridge construction and hydraulic structures.

ShokparTas quarry produces M1200-M1400 grade crushed stone, meeting the highest quality standards of the Republic of Kazakhstan.

Fractions and Their Applications

Fraction refers to the size of crushed stone grains in millimeters. The choice of fraction directly depends on the type of work.

• 0-5 mm (screenings) — for paving tiles and landscaping.
• 5-20 mm — the most popular fraction for concrete and asphalt.
• 20-40 mm — optimal choice for foundations and drainage systems.
• 25-60 mm — railway ballast crushed stone.

Quality Criteria

When choosing crushed stone, pay attention to these parameters:

• Flakiness — the content of needle-shaped grains. The lower, the better.
• Frost resistance — ability to withstand freeze-thaw cycles.
• Radioactivity — only Class 1 for residential construction.

Conclusion

When choosing crushed stone, always consider the combination of factors: strength grade, fraction, and frost resistance. For permanent structures, we recommend granite crushed stone grade M1200 or higher.

This ensures your project's reliability for decades to come.