Quality Aggregates. Reliable Supply.

Keystone supplies a broad range of aggregate products supporting construction, infrastructure, and site development projects throughout the region.

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Aggregates

Aggregate Solutions for Construction and Infrastructure

Keystone aggregate products are used in ready-mixed concrete, asphalt production, drainage systems, road construction, and site development applications.

Customers rely on Keystone for high-quality materials, dependable supply, and responsive service that helps keep projects moving.

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Who We Serve

We provide consistent, uniform aggregates and superior service to customers across the construction industry, including:

  • Ready-Mix Producers
  • Block, Paver, and Precast Producers
  • Asphalt Producers
  • Site Contractors
  • Utility Contractors
  • Municipalities
  • Commercial Developers
  • Residential Contractors
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Product Lineup

Featured Aggregate Solutions

#10 Screenings

Size range: Fines – 3/8”

Fine crushed stone material commonly used in pavement preservation, manufactured concrete products, and base applications. #10 Screenings are frequently used in oil and chip resurfacing (microsurfacing) applications and in the production of concrete block.

Typical Applications:

  • Oil and chip resurfacing
  • Concrete block production
  • Paver base and leveling
  • Pipe bedding
  • General construction applications

¼" Stone

Size range: 1/16” – ¼”

A small, clean crushed stone commonly used in drainage and bedding applications where a uniformly graded aggregate is required.

Typical Applications:

  • Drainage systems
  • Pipe bedding
  • Under-slab drainage
  • Backfill applications
  • Decorative stone applications

#8 Aggregate

(½" Stone / 1B)

Size range: ¼” – ½”

A clean, uniformly graded crushed stone designed for drainage, bedding, and paving applications. #8 Aggregate is widely used in residential, commercial, and infrastructure projects where a stable, free-draining aggregate is required.

Typical Applications:

  • Driveway top dressing
  • Oil and chip road resurfacing
  • Utility pipe bedding
  • Gel and water tank bedding
  • Bedding beneath precast and Superior Walls® systems
  • Asphalt mixes

    #57 Aggregate

    (¾" Stone / 2B)

    Size range: ¼” – 1 ½”

    A clean, free-draining crushed stone used in concrete, drainage, and utility applications. #57 Aggregate is commonly specified where stability and drainage performance are required.

    Typical Applications:

    • Under concrete slabs and sidewalks
    • Sewer system stone
    • Drainage systems
    • Foundation backfill
    • Ready-mixed concrete

    #3 Aggregate

    (1½" Stone)

    Size range: ½” – 2 ½”

    A large, free-draining crushed stone commonly used for stabilization, drainage, and erosion control applications. #3 Aggregate is frequently specified where durable, permeable aggregate is required.

    Typical Applications:

    • Tire scrubbers and construction entrances
    • Driveway base applications (with screenings)
    • Pond decorative edging
    • Stormwater diversion pits
    • Drainage and stabilization applications

    2A Modified

    Size range: Fines to 1 ½”

    A dense-graded aggregate blend designed to compact tightly and provide a stable base for construction and site development projects.

    Typical Applications:

    • Road base
    • Driveway base
    • Parking areas
    • Structural fill
    • Site preparation

    3A Modified

    Size range: Fines to 2 ½”

    A compactible aggregate commonly used for heavy-duty base and site-preparation applications.

    Typical Applications:

    • Road construction
    • Heavy-duty base applications
    • Commercial and industrial developments
    • Structural fill
    • Site development

    General Fill

    (Screened)

    Size Range: Varies by application; contact us for specifications.

    A screened fill material suitable for grading, backfill, and general site development applications.

    Typical Applications:

    • Site grading
    • Backfill
    • General earthwork
    • Site preparation
    • Construction fill

    Additional Products and Specifications Available

    Keystone supplies a broad portfolio of aggregate products for commercial, industrial, infrastructure, and site development applications. Beyond the featured products shown above, we offer a variety of AASHTO stone, modified materials, anti-skid products, rip rap, gabion stone, fill materials, and specialty aggregates to meet specific project requirements and specifications.

    Contact our team for product availability, specifications, and assistance selecting the appropriate material for your project.

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    Service Areas

    Keystone Aggregates proudly serves customers throughout the Lehigh Valley, providing dependable aggregate supply for construction, infrastructure, and site development projects.

    Our service area includes:

    • Allentown
    • Bethlehem
    • Easton
    • Lehigh County
    • Northampton County
    • Surrounding communities throughout the Lehigh Valley region

    Looking for delivery outside these areas?
    Contact us to discuss your needs. 610.477.4953