CO₂-Nomicom — Carbonated Recycled Crushed Stone Aggregate
Recycled crushed stone aggregate from concrete demolition waste that fixes CO₂ through accelerated carbonation during processing. Used as road base, backfill, and subbase material. NETIS registered. Produced at multiple plants in Kanto region with combined capacity >2,000 t/day.
AI-assisted directory summary. Technical specifications, performance metrics, readiness and compliance labels are unverified unless individually supported and reviewed. Proposed partnership routes do not establish supplier consent, export eligibility, or willingness to sign an NDA. Confirm claims and test conditions with the linked sources and supplier before procurement or citation.
Problem solved
Construction demolition waste (concrete-ga ra) constitutes a major waste stream, and conventional recycling produces aggregate that still has a net carbon footprint from crushing and transport. CO₂-Nomicom converts the calcium-rich cement paste fraction into a CO₂ sink via accelerated carbonation, producing a carbon-negative recycled aggregate that can replace virgin crushed stone in civil engineering applications.
Application contexts
- Road base and subbase for public infrastructure projects under green procurement
- Backfill material for retaining walls and foundation works
- Precast concrete secondary products (blocks, pavers) with embedded CO₂
- Carbon sequestration as a co-benefit of mandatory construction waste recycling
Technical principle
Concrete demolition waste is crushed and graded into recycled aggregate. During processing, the material is exposed to controlled CO₂ atmosphere in a carbonation chamber. Calcium hydroxide (Ca(OH)₂) and calcium silicate hydrate (C-S-H) from the residual cement paste in the recycled aggregate react with CO₂ to form calcium carbonate (CaCO₃), permanently fixing CO₂ in the solid phase. The carbonated aggregate also shows improved particle density and reduced water absorption compared to standard recycled aggregate.
Typical use cases
- Carbon-negative road base material for public road projects with embodied-carbon limits
- CO₂-sequestering backfill for building foundation works in urban redevelopment
- Aggregate for precast concrete blocks with verified CO₂ fixation credits
Partnership route
How global engineering teams typically engage this asset.
Helpful to include: What is the verified CO₂ fixation rate per tonne of aggregate under the current process? · Is the carbonation process compatible with recycled aggregate from mixed (not pure concrete) demolition waste? · Is the technology available for licensing to overseas waste processing operators? · What quality control standards (JIS, ASTM) does the carbonated aggregate meet?
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Source & provenance
Translation review status: unreviewed. Publication does not establish technical verification or supplier endorsement.
Original language: JA.
Record updated: .
- CO2-Nomicom 製造方法
https://co2-nomicom.com/manufacturing-method/
Primary-source candidate; evidence review: pending.
Source accessed / recorded (collector timestamp): .
Source publication date: Not recorded.
- 脱炭素再生砕石LAB 会社情報
https://co2-nomicom.com/company/
Primary-source candidate; evidence review: pending.
Source accessed / recorded (collector timestamp): .
Source publication date: Not recorded.
- 脱炭素再生砕石「CO2-Nomicom」がNETISに登録されました
https://www.kurohime.co.jp/news/ip/2206/
Primary-source candidate; evidence review: pending.
Source accessed / recorded (collector timestamp): .
Source publication date: Not recorded.
Collector timestamps record when a source was stored, not an independent verification date. Source links provide context; they do not validate every specification, readiness label, certification, or proposed partnership route.