Crushed stone is a versatile material used in various construction projects, including road base, concrete aggregate, drainage systems, and landscaping. Here are the common types of crushed stones used in construction:
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1. Granite Crushed Stone
– Description: Hard, durable, and available in various colors (gray, pink, white).
– Uses: High-strength concrete, road base, railroad ballast, decorative landscaping.
2. Limestone Crushed Stone
– Description: A softer sedimentary rock that compacts well; typically white or light gray.
– Uses: Base material for roads and driveways, concrete production, agricultural lime (soil stabilization).
3. Trap Rock (Basalt)
– Description: Dark-colored volcanic rock with high density and durability.
– Uses: Asphalt pavement aggregate, railroad ballast, erosion control.
4. Sandstone Crushed Stone
– Description: Medium-hard sedimentary rock with a rough texture.
– Uses: Fill material, drainage layers, decorative stone for walkways.
5. Gneiss Crushed Stone
– Description: Metamorphic rock with a banded appearance; similar to granite but more varied in color.
– Uses: Road base, landscaping stone, riprap for erosion control.
6. Slate Crushed Stone
– Description: Fine-grained metamorphic rock that splits into flat layers.
– Uses: Roofing granules (not structural), decorative gravel for pathways.
7. Marble Crushed Stone
– Description: Metamorphosed limestone with a polished appearance; less durable than granite.
– Uses: Decorative landscaping (white marble chips), terrazzo flooring filler.
8. Recycled Concrete Aggregate (RCA)
– Description: Made from crushed demolition concrete waste.
– Uses: Roa.jpg)
ub-base, backfill material, new concrete production (when properly processed).
Common Sizes of Crushed Stone (Gradation)
– #57 – Medium-sized (~1″ diameter) – Good for drainage & concrete mix.
– #411 – A mix of #57 stone & fine dust – Compacts well for road base.
– #304 – Similar to #411 but with limestone dust – Used