What is disclosed
Martin Marietta reports 2024 concrete-processing and recycled-product volumes, including recovered reinforcement steel.
Evidence-bound company brief · as of September 18, 2026
Martin Marietta NYSE: MLM
Aggregates, cement and recycled construction materials
MM
Public materials brief.
Public materials brief.
Martin Marietta processed 2.7 million tons of concrete in 2024 and sold more than 2.3 million tons as recycled material. Recycled aggregate is an operating lane, not a theoretical one.
The company also reports California recycling facilities and recovered reinforcement steel. It does not identify an open feedstock contract, receiving specification or project buyer.
2.7M tonsConcrete processed in 2024
OpenPlant, grade and buyer evidence
ScreeningNo commercial claim
As ofSeptember 18, 2026
Material inputs to resolve
- Demolition concrete
- Embedded reinforcement steel
Outputs and residuals to resolve
- Crushed base, ballast and rip rap
- Recovered steel
First decision: Yard geography, gradation and buyer specification.
What remains unproven
The report does not establish a supplier agreement, price, project award or usable volume at one facility.
Decision boundary
Martin Marietta processed 2.7 million tons of concrete in 2024 and sold more than 2.3 million tons as recycled material. Recycled aggregate is an operating lane, not a theoretical one. The public record supports one bounded next move: Yard geography, gradation and buyer specification. It does not establish a buyer, commercial approval or supply agreement.
Material flow map
| Material or stream | Qualification gate | Process or destination | Evidence still needed |
|---|---|---|---|
| Demolition concrete | Composition and specification | Crushed base, ballast and rip rap | Site, volume and buyer evidence |
| Embedded reinforcement steel | Condition and logistics | Recovered steel | Yield and destination evidence |
This is a public screening map. It separates company-disclosed flows from open qualification work. It does not convert a destination into a buyer or an announced ambition into operating capacity.
Three defensible entry lanes
Urban recycling
Prioritize a site where recycled aggregate avoids long haul from virgin reserves.
Next evidence: Yard geography, gradation and buyer specification.
Company-specific lanePublic evidence gap visible
Qualification path
Separate disclosed company activity from a usable commercial lane.
Next evidence: Named site, product grade and technical owner.
Company-specific lanePublic evidence gap visible
Commercial boundary
Do not infer customer demand from corporate reporting.
Next evidence: Buyer specification, commercial terms and approval.
Company-specific lanePublic evidence gap visible
Evidence register
- 2024 Sustainability ReportMartin Mariettahttps://mcdn.martinmarietta.com/assets/sustainability/2024sustainabilityreport.pdf
- Sustainability hubMartin Mariettahttps://www.martinmarietta.com/sustainability
- Recycled aggregates sectionMartin Mariettahttps://mcdn.martinmarietta.com/assets/sustainability/flip/sustainability2024-b/files/basic-html/page59.html
- Sustainability Report 2025Martin Marietta, official sustainability reporthttps://mcdn.martinmarietta.com/assets/sustainability/2025sustainabilityreport.pdf
Source hierarchy: filings and company disclosures first. The brief states what those sources support and leaves the unresolved plant, grade, permit, buyer and mass-balance questions explicit.
Artifact metadata
Public briefArtifact ID: mt-martin-marietta-20260917As of: 2026-09-18Public-facing metadata only
Machine-readable source manifest
{
"artifact_id": "mt-martin-marietta-20260917",
"company": "Martin Marietta",
"as_of_date": "2026-09-18",
"sources": [
{
"title": "2024 Sustainability Report",
"publisher": "Martin Marietta",
"url": "https://mcdn.martinmarietta.com/assets/sustainability/2024sustainabilityreport.pdf"
},
{
"title": "Sustainability hub",
"publisher": "Martin Marietta",
"url": "https://www.martinmarietta.com/sustainability"
},
{
"title": "Recycled aggregates section",
"publisher": "Martin Marietta",
"url": "https://mcdn.martinmarietta.com/assets/sustainability/flip/sustainability2024-b/files/basic-html/page59.html"
}
]
}