Construction / decarbonization
Low-carbon and self-healing concrete capabilities
The low-carbon concrete hub maps different routes to lower-impact concrete rather than treating them as one product category. Published records cover cement-replacement mixes, mineralized CO2, recycled aggregates, volcanic-glass materials, and self-healing concrete for infrastructure applications.
10 published capability assets in this hub.
What this covers
- Slag, volcanic-glass, and recycled-aggregate approaches to reduce cement-related emissions
- Precast, ready-mix, block, and pile-related concrete products
- CO2 mineralization and bacterial self-healing concrete platforms
Published capability assets
Compare the problem solved, constraints, readiness, and partnership route on each record.
KLC Low-Carbon High-Flow Concrete Products
Precast concrete products formulated with 55% blast furnace slag micro-powder substitution for cement, delivering ~45% CO2 reduction while maintaining high flowability and long-term strength.
High CO2 emissions from conventional cement-intensive concrete in infrastructure projects under decarbonization mandates.
COCOLOW Low-Carbon Precast Concrete Products
Precast concrete secondary products using blast furnace and molten slag to achieve ~40% CO2 reduction compared to conventional mixes.
Elevated embodied carbon in standard precast concrete for civil and infrastructure applications.
COCOLOW low-carbon precast concrete (blast furnace slag + molten slag)
Precast concrete products formulated with ~40% lower CO2 emissions through high replacement of Portland cement by blast furnace slag and substitution of fine aggregate with molten slag from waste incineration.
High embodied carbon in conventional precast concrete for infrastructure and urban projects; need for drop-in low-carbon alternatives using local industrial byproducts without major process changes.
High blast-furnace-slag low-carbon concrete secondary products
Drainage blocks, retaining walls and other concrete secondary products manufactured with 55%+ blast furnace slag micro-powder replacement for Portland cement to achieve proportional CO2 reduction per Japanese MLIT low-carbon concrete guidelines.
Embodied carbon from cement in public infrastructure secondary products; requirement for verifiable low-carbon alternatives compatible with existing construction practices and government green procurement.
REDECO2 low-carbon concrete products (retaining walls, barriers, specialty precast)
Low-carbon variant concrete products under REDECO2 brand for retaining walls, fences, and infrastructure items, developed to reduce CO2 through proprietary and partner low-carbon technologies.
Need for low-carbon alternatives to standard precast retaining walls and barriers in projects with sustainability or net-zero targets, especially in disaster-prone or rural settings.
Silica White — Volcanic Glass Micro-Powder Concrete Admixture
A natural pozzolan micro-powder (volcanic glass ground to 3–4× cement fineness) that replaces a portion of Portland cement in concrete, reducing clinker factor while improving durability (waterproofing, chloride resistance, freeze-thaw resistance, ASR suppression). JIS A 6209 certified and JIS A 5308 listed. NETIS registered.
Reducing the clinker factor in concrete without sacrificing strength or durability is the primary lever for cutting construction embodied carbon, but supplementary cementitious materials (fly ash, slag, silica fume) face supply constraints and regional availability limits. Silica White offers a natural-pozzolan alternative sourced from domestic volcanic deposits.
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.
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.
CarbonCure low-carbon ready-mix and precast concrete
Ready-mix and precast concrete manufactured by injecting liquefied CO2 into the mixer, forming nano-scale calcium carbonate minerals that enable cement reduction while maintaining or increasing strength.
Reduces cement demand and embodied CO2 in ready-mix and precast concrete by mineralizing injected CO2, without compromising structural performance.
Basilisk bacterial self-healing concrete platform
Bacteria-based self-healing concrete that precipitates calcium carbonate to seal cracks autonomously, extending RC structure design life from 65 to 100+ years and reducing maintenance CO2.
Eliminates or delays manual crack repair in reinforced concrete, cutting maintenance CO2 and extending service life beyond conventional 65-year design life.
Kyushu shirasu volcanic-glass micro-powder as cement-replacement SCM
Domestic volcanic-glass powder ground from Kagoshima/Miyazaki shirasu, offered as a partial Portland-cement replacement and as a silica-fume / slag alternative in concrete, shotcrete, grout and refractories.
Silica fume is import-dependent and blast-furnace slag supply is shrinking as steelmaking shifts; a domestic natural pozzolan is needed that can replace part of cement without a new placement method.
Related Japanese companies
Companies shown here are linked from the published capability records in this hub.
株式会社キクノ
Ehime, Japan (Matsuyama, Saijo, Ozu)
Regional concrete products and ready-mix concrete manufacturer founded 1875, specializing in low-carbon concrete formulations using industrial by-products.
小倉セメント製品工業株式会社
Kitakyushu, Fukuoka, Japan
Precast concrete secondary products manufacturer offering COCOLOW low-carbon concrete line using industrial by-products.
小倉セメント製品工業株式会社 (Kokura Cement Products Kogyo Co., Ltd.)
Kitakyushu, Fukuoka, Japan
Precast concrete products manufacturer specializing in low-carbon formulations using industrial byproducts from local steel and waste sectors.
四国ブロック工業株式会社 (Shikoku Block Kogyo Co., Ltd.)
Kochi, Japan
Concrete secondary products manufacturer (drainage blocks, retaining walls) that launched low-carbon concrete lines using high blast furnace slag replacement.
株式会社赤城商会 (Akagi Shokai Co., Ltd.)
Shibukawa, Gunma, Japan
Concrete products manufacturer offering retaining walls, fences, and specialty items with proprietary low-carbon product brand REDECO2.
株式会社シリカジャパン
北海道石狩市緑苑台東3条1丁目52
Very small Hokkaido-based manufacturer of volcanic glass micro-powder concrete admixture 'Silica White', a natural pozzolan that can replace a portion of Portland cement in concrete, reducing CO₂ emissions from cement production while improving durability. Originally established as a yūgen kaisha in 1996 and reincorporated as a kabushiki kaisha in 2024. Registered on NETIS and JIS A 6209 certified for concrete-use volcanic glass micro-powder.
株式会社黒姫
東京都足立区西新井5丁目4番1号
Tokyo-based construction waste processor (est. 1973, ~68 employees) that developed CO₂-Nomicom — recycled crushed stone aggregate that fixes CO₂ via accelerated carbonation during the recycling process. Converts concrete demolition waste into carbon-negative aggregate for road base, backfill, and concrete secondary products. NETIS registered. Operates multiple processing plants in the Kanto region with a combined production capacity of >2,000 t/day.
Aizawa Concrete Corporation
Tomakomai, Hokkaido, Japan
Regional comprehensive concrete manufacturer implementing CarbonCure CO2 mineralization and Basilisk self-healing concrete for precast, ready-mix, and pile products.
e-Cearras Co., Ltd.
Hioki, Kagoshima, Japan
Kagoshima micro-firm offering domestic volcanic-glass (shirasu) micro-powder as a cement-replacement supplementary cementitious material for concrete, shotcrete, ground improvement and refractories.
For teams qualifying this capability
- Which product type, mix design, and performance requirement must remain unchanged?
- Are you evaluating cement replacement, CO2 mineralization, recycled aggregate, or self-healing?
- What local standards, test evidence, and pilot volume should be part of the brief?