Crushed StonesRR1 Riprap
IDOT-certified RR1 is a heavy-duty 3" crushed stone built for erosion control, drainage, construction entrances, and structural fill. Where strength and durability matter most, RR1 is up to the task.
RR1 Riprap (IDOT Certified #0212RR01), commonly known as 3 Inch, is a large, angular crushed stone designed to perform in the most demanding construction and civil applications. Its substantial size and rugged profile make it an exceptionally effective erosion control material, capable of absorbing and deflecting the energy of flowing water to protect embankments, slopes, and drainage channels from washout and degradation.
Beyond erosion control, RR1's mass and angular shape make it a strong performer as a drainage aggregate, allowing water to pass freely through large void spaces while maintaining structural integrity. It is widely used at construction entrances to stabilize high-traffic access points, as a fill and foundation material where significant load-bearing capacity is needed, and as a base layer for roads and driveways requiring a deep, durable subbase.
IDOT-certified for quality and consistency, RR1 is a trusted material for infrastructure, civil, and heavy construction projects of all scales.
Common Uses: Roads, driveways, foundations, fill material, drainage, erosion control, and construction entrances.
Technical Specifications
- Maximum Particle Size
- 3 in. (75 mm)
- Bulk Density
- 100 – 115 lbs/ft³ (1,600 – 1,840 kg/m³)
- Specific Gravity
- 2.60 – 2.70
- Water Absorption
- 0.5% – 2.0%
- Los Angeles Abrasion Loss
- ≤ 45% (ASTM C131)
Any questions?
FAQs
RR1's large, angular stones interlock and resist displacement under flowing water and surface runoff, absorbing and deflecting erosive energy that would quickly wash away soil or smaller aggregate materials.
Yes. RR1 is widely used at construction entrances to stabilize high-traffic access points, preventing mud and sediment from being tracked onto roadways while standing up to heavy equipment loads.
RR1, at 3 inches, is best suited for moderate erosion control, drainage, and fill applications. Larger grades like RR3 (9"x6") and RR4 (16"x12") are designed for higher-velocity waterways, shoreline protection, and more extreme hydraulic conditions.
Yes. RR1 is IDOT certified under specification #0212RR01, meeting Illinois Department of Transportation standards for quality and consistency.
