Capitol Aggregates
Capitol Aggregates is a Texas-based construction materials producer founded in 1957, supplying cement, aggregates, and asphalt from nine facilities to contractors and ready-mix concrete manufacturers across South, Central, and West Texas.
- Company typePrivate
- Founded1957
- HeadquartersSan Antonio, United States
- Headcount251–500
- GTM typeB2B
- OfferingHardware or Manufacturing
What Capitol Aggregates does
Capitol Aggregates is a Texas-based construction materials producer founded in 1957 and headquartered in San Antonio. The company manufactures and supplies cement, crushed stone, sand and gravel, base/fill materials, and asphalt products to construction contractors, general contractors, ready-mix concrete producers, and concrete products manufacturers across South, Central, and West Texas. Capitol Aggregates operates nine wholly-owned production facilities — including the San Antonio Cement Plant (operational since 1968, producing Type I, Type III, Eco-Ment, and masonry cements), Delta Materials, Hoban Sand & Gravel, Rio Medina Quarry, Solms Quarry, Poteet Sand Plant, Mathis Sand & Gravel, and San Pablo Sand & Gravel — making it one of the larger regional cement-and-aggregates platforms in Texas.
The company's product portfolio spans Portland cements meeting ASTM C 150 (Type I, Type III), masonry cements meeting ASTM C 91-05 (Type N, Type S), blended hydraulic cements meeting ASTM C 595 (Eco-Ment DuroPozz, Eco-Ment Spec, Eco-Ment Endure), coarse and fine aggregates, base/fill materials, and pre-coated/hot/cold mix asphalt. Capitol Aggregates was the first cement producer in North America to acquire an Environmental Product Declaration (EPD) for cement (2015), and the proprietary Eco-Ment sub-brand differentiates its lower-carbon blended cements for LEED-compatible and DOT sustainable-procurement projects. A 2022 new finish mill expansion at the San Antonio cement plant specifically scaled Eco-Ment manufacturing capacity.
Capitol Aggregates runs a direct sales motion through dedicated sales representatives assigned by product line and geography; pricing is quote-based and not publicly disclosed. The company is a wholly-owned subsidiary of Zachry Corporation, a diversified San Antonio-based construction and infrastructure conglomerate, and operates as a privately held company with no public listing. It also participates as a field-testing partner for Bedrock Robotics' autonomous excavator platform, alongside Sundt Construction, Zachry Construction, and Champion Site Prep.
Capitol Aggregates firmographics
Firmographics- Name
- Capitol Aggregates
- Legal name
- CAPITOL AGGREGATES INC.
- Website
- https://capitolaggregates.com
- Company type
- Private
- Founded year
- 1957
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- Capitol Aggregates is a Texas-based construction materials producer founded in 1957, supplying cement, aggregates, and asphalt from nine facilities to contractors and ready-mix concrete manufacturers across South, Central, and West Texas.
- Ownership category
- akta.pro rank
Capitol Aggregates industry classification
Industry- Product category
- Construction Materials Manufacturing
- NAICS
- Cement Manufacturing (327310), Construction Sand and Gravel Mining (212321), Asphalt Paving Mixture and Block Manufacturing (324121), Asphalt Paving, Roofing, and Saturated Materials Manufacturing (32412)
- SIC
- Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400), Cement, Hydraulic (3241), Asphalt Paving & Roofing Materials (2950), Concrete, Gypsum & Plaster Products (3270)
- akta.pro primary industry
- Crushed Stone Quarrying & Processing (IMAKAHAA)
- akta.pro secondary industries
- Aggregate Processing & Value-Added Products (Washing, Screening, Asphalt/Concrete Aggregates) (IMAKAHAH), Asphalt Aggregates & Specialty Aggregates (Rail Ballast, Riprap, Lightweight) (IMADAAAJ), Aggregates & Dimension Stone Trading (Sand & Gravel, Crushed Stone, Limestone, Granite, Marble) (IMAKAJAG)
Keywords
Where Capitol Aggregates is headquartered
LocationHeadquarters
- HQ city
- San Antonio
- HQ country
- United States
- HQ region
- North America
Offices9 records
Markets served
Capitol Aggregates business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Infrastructure, Personnel, Marketing or Sales
Revenue model
- Cement Sales: Sale of various cement products including Type I, Type III, and Eco-Ment blended cements in both bulk (Short Ton) and packaged (Sack) formats from the San Antonio Cement Plant.
- Aggregate Sales: Sale of construction aggregates including coarse aggregates (various grades of concrete rock, building stone), fine aggregates (sand, mortar sand, screenings), and base/fill materials from multiple Texas quarry and plant locations.
- Asphalt Products: Sale of pre-coated asphalt aggregates and hot/cold mix asphalt products for highway and road construction.
- Packaged Goods: Sale of packaged cement products including masonry cement (Type N, Type S) and bagged Portland cement for retail and contractor customers.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Pay-as-you-go | Quote-based pricing for all product categories |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
Capitol Aggregates product offering
Product offeringCore offering
Capitol Aggregates manufactures and supplies construction materials including cement (Type I, Type III, masonry, and Eco-Ment blended cements), crushed stone and gravel aggregates, sand, base and fill materials, and asphalt products from its cement plant, quarries, and sand and gravel operations across Texas. Products are sold in bulk and packaged formats for use in road construction, highways, residential and commercial buildings, and ready-mix concrete production.
Product overview
Capitol Aggregates is a Texas-based construction materials supplier offering a diversified portfolio of aggregate and cement products. The company operates multiple production facilities across South, Central, and West Texas. Its cement product line includes general purpose Type I and Type III cements, Type N and Type S masonry cements, and the proprietary ECO-MENT brand of blended hydraulic cements (DuroPozz, Spec, and Endure variants) that offer environmental benefits. The company also supplies construction aggregates including coarse aggregates (crushed stone and gravel), fine aggregates (natural and manufactured sand), base and fill materials, and asphalt products. The ECO-MENT line represents the company's green/sustainable product sub-brand focused on lower carbon footprint alternatives.
Differentiator
Problem solved
Functional benefit
Brands
- Eco-Ment: Earth-friendly cement product line with lower carbon footprint including DuroPozz, Spec, and Endure variants
- ECO-MENT DuroPozz
- ECO-MENT Spec
- ECO-MENT Endure
Products and services
- Capitol ECO-MENT DuroPozz Cement Blended hydraulic cement meeting ASTM C595 Type IT(P15)(P15)(HS) standards, suitable for general construction and moderate to high sulfate resistance applications.
- Capitol ECO-MENT Spec Cement Portland Limestone Cement meeting ASTM C595 Type IL standards, suitable for ready-mix concrete, volumetric, and concrete products manufacturing operations.
- Capitol ECO-MENT Endure Cement Blended cement meeting ASTM C595 Type IP(HS) standards for general construction and structural concrete applications with high sulfate resistance.
- Capitol Type I Cement General purpose Portland cement meeting ASTM C150 standards, low alkali cement suitable for environments where alkali-silica reactivity is of concern.
- Capitol Type III Cement High-early strength general purpose cement meeting ASTM C150 standards, designed for concrete products applications requiring rapid strength development.
- Capitol Type N Masonry Cement Masonry cement meeting ASTM C91-05 standards, recommended for exterior walls, retaining walls, manholes, sewers, pavements, and load-bearing walls above grade.
- Capitol Type S Masonry Cement Masonry cement meeting ASTM C91-05 standards, recommended for exterior walls, retaining walls, manholes, sewers, pavements, and load-bearing walls at or below grade.
- Coarse Aggregate Crushed stone and gravel products in various grades for ready mix concrete, asphalt, and decorative stone applications.
- Fine Aggregates Natural and manufactured sand products for concrete, masonry, and construction applications.
- Base and Fill Materials Construction foundation materials consisting of crushed stone, rock fines, and clay used in foundations and road construction for concrete and asphalt paving preparation.
- Asphalt Products Pre-coated aggregate and hot/cold mix asphalt products for highway and road construction applications.
- Packaged Cement Goods Bagged cement products including masonry cements and general purpose cements available in various weight increments for retail and contractor customers.
Quantifiable outcome
- First cement producer in North America to acquire an Environmental Product Declaration (EPD)
Companies that use Capitol Aggregates
Customer profileNamed customers1 record
Segments2 records
Ideal customer profiles2 records
Capitol Aggregates technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
Capitol Aggregates partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Bedrock RoboticscoreCapitol Aggregates has partnered with Bedrock Robotics as a field testing site for autonomous excavator technology. Bedrock Robotics retrofits existing construction equipment with autonomous systems. Capitol Aggregates is one of several construction partners (along with Sundt Construction, Zachry Construction, and Champion Site Prep) testing the Bedrock Operator platform on excavators at customer sites in Texas and other states.
Scale indicators3 records
Recent moves8 records
Expansion highlights3 records
Capitol Aggregates competitors and assessment
Company assessmentBroad incumbents
- Summit Materials: Vertically integrated construction materials producer with aggregates, cement, and ready-mixed concrete operations, including Texas assets. Similar diversified product portfolio and customer base, though broader geographic footprint.
- Vulcan Materials Company: The largest U.S. producer of construction aggregates, with cement and ready-mixed concrete operations. Comparable product portfolio (aggregates, cement, asphalt) and similar customer base of construction contractors and infrastructure developers.
- Cemex USA: Global cement and aggregates major with a significant Texas footprint. Competes with Capitol in cement supply and supplementary cementitious materials, with comparable blended cement and lower-carbon product offerings.
- Eagle Materials: U.S. manufacturer of cement, wallboard, and concrete products. Comparable as a cement-focused operator selling into construction markets, though broader in wallboard and operating at national rather than regional scale.
- Martin Marietta Materials: One of the largest U.S. aggregates and heavy building materials producers, operating quarries and cement plants across multiple states including Texas (via legacy TXI assets). Directly comparable as an aggregates-led operator with cement exposure, though at far larger scale.
- Holcim US: Major U.S. cement and aggregates producer (part of Holcim Group) competing with Capitol in cement supply and lower-carbon blended products, with overlapping Texas customer base.
- Lehigh Hanson (Heidelberg Materials): Major North American producer of cement, aggregates, and ready-mixed concrete with Texas operations. Comparable as a multi-product heavy building materials supplier, though at national/global scale and with broader geographic reach.
Direct peers
- Texas Industries (TXI): Historic Texas-based cement, aggregate, and ready-mix producer now part of Martin Marietta. Was a direct competitor to Capitol Aggregates in the Texas cement and aggregates market with overlapping product lines and customer base.
- Ash Grove Cement (CRH): U.S. cement producer with a strong central/southern U.S. presence (now part of CRH). Directly comparable in cement manufacturing and lower-carbon blended cement portfolio, targeting similar ready-mix and concrete-products customers.
Others
- Zachry Group (parent): Parent conglomerate of Capitol Aggregates and a major Texas construction contractor (Zachry Construction). Not a competitor but a closely related party providing capital backing and potential pull-through demand for Capitol's materials through construction contracts.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks1 record
Key highlights7 records
Customer concentration
Capitol Aggregates social profiles
Digital presenceCapitol Aggregates compliance and trust
Trust signalCompliance4 records
Capitol Aggregates financial estimates
Financial estimateRevenue estimate
Valuation estimate
Capitol Aggregates leadership team
Management profileNumber of profiles
Capitol Aggregates subsidiaries and ownership
Company hierarchySubsidiaries7 records
Capitol Aggregates funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Capitol Aggregates M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Capitol Aggregates
What does Capitol Aggregates do?
Capitol Aggregates manufactures and supplies construction materials including cement (Type I, Type III, masonry, and Eco-Ment blended cements), crushed stone and gravel aggregates, sand, base and fill materials, and asphalt products from its cement plant, quarries, and sand and gravel operations across Texas. Products are sold in bulk and packaged formats for use in road construction, highways, residential and commercial buildings, and ready-mix concrete production.
Is Capitol Aggregates a public or private company?
Capitol Aggregates is a private company. It is classified as corporate owned and is currently operating.
When was Capitol Aggregates founded?
Capitol Aggregates was founded in 1957. It employs 251 to 500 people.
Where is Capitol Aggregates based?
Capitol Aggregates is headquartered in San Antonio, United States, in the North America region.
How does Capitol Aggregates make money?
Four revenue lines are on record. Cement Sales are the primary driver. The others are aggregate Sales, asphalt Products and packaged Goods.
Who are Capitol Aggregates's main competitors?
Broad incumbents on record are Summit Materials, Vulcan Materials Company, Cemex USA, Eagle Materials, Martin Marietta Materials, Holcim US and Lehigh Hanson (Heidelberg Materials). Direct peers are Texas Industries (TXI) and Ash Grove Cement (CRH). Zachry Group (parent) is listed as an others.
Does Capitol Aggregates have an API?
No public API is recorded for Capitol Aggregates.
What industry is Capitol Aggregates in?
Capitol Aggregates's product category is Construction Materials Manufacturing. Its primary akta.pro industry code is IMAKAHAA, Crushed Stone Quarrying & Processing, with a secondary code of IMAKAHAH, Aggregate Processing & Value-Added Products (Washing, Screening, Asphalt/Concrete Aggregates). Its NAICS code is 327310 and its SIC code is 1400.