s* research and development project
TRANSCRIPT
The University of TokyoHokkaido UniversityTokyo University of ScienceKogakuin UniversityUtsunomiya UniversityShimizu CorporationTaiheiyo CementMasuo Recycle
C4S* Research and Development Project
*Calcium Carbonate Circulation System for Construction
Project Manager: Takafumi Noguchi (The University of Tokyo)
Participating InstitutionsThe University of Tokyo, Hokkaido University
Tokyo University of Science, Kogakuin University, Utsunomiya University
Shimizu Corporation, Taiheiyo Cement, Masuo Recycle
October 6th, 2021 C4S Research and Development Project [email protected] 1
The University of TokyoHokkaido UniversityTokyo University of ScienceKogakuin UniversityUtsunomiya UniversityShimizu CorporationTaiheiyo CementMasuo Recycle
October 6th, 2021 C4S Research and Development Project
Project Manager: Takafumi Noguchi
Professor, Dr. Eng., Department of Architecture, The University of Tokyo
Professional Experience1988 Assistant Professor at the University of Tokyo
1997 Visiting Scholar at the University of California at Berkeley
1998 Associate Professor at the University of Tokyo
2009-2011 Guest Professor at Xi'an University of Architecture and Technology
2010-2013 Guest Professor at University of Science and Technology of China
2014 Professor at the University of Tokyo
Committee ActivitiesChair of ISO/TC71/SC8 (Environmental management for concrete and concrete structures)
Deputy-chair of fib (Fédération Internationale du Béton) Commission 7 (Sustainability)
National Convener of RILEM (Réunion Internationale des Laboratoires et Experts des Matériaux, systèmes de construction et ouvrages)
Research Interest1) Development of carbon-neutral concrete
2) Sustainable recycling and optimum supply-chain in construction industries
3) Regeneration and conservation of historical concrete structures
4) Durability design and optimum rehabilitation of concrete structures
5) Development of super high-performance concrete
Circulation of CO2 and Ca in Nature and C4S
October 6th, 2021 C4S Research and Development Project
Formation of limestone by biological and inorganic processes
CO2
CO2
CO2
Limestone(CaCO3)
https://earthstonetexas.com/azul-maya-slabs
CO2CO2
Cement(CaO)
Concrete Structures(CaO)
Concrete Waste(CaO)
CO2
CO2
CO2
Production of
CCC raw materials
Production of CCC
(Calcium Carbonate
Concrete, CaCO3)
C4SRecycled concrete aggregate
Calcium bicarbonate solution
CCC products
◼ Total CO2 in the atmosphere
2,800 billion tons
◼ CO2 emissions due to decarboxylation
during cement production
➢Cumulative amount
World 55,000 million tons
Japan 2,000 million tons
➢ Annual
World 2,100 million tons
Japan 26 million tons
Stock
World 840 billion tons
Japan 30 billion tons
CO2
CO2
CO2
CO2
CO2CO2
Production of CCC (Calcium Carbonate Concrete)
October 6th, 2021 C4S Research and Development Project
Drum dryer with airflow blowing and heating
Capture of CO2
Adjustment of RCA particle size
PJ-II
“Production of CCC Raw Materials”Hokkaido University
Masuo Recycle
PJ-III
“Practical Implementation”The University of Tokyo
Kogakuin University
Utsunomiya University
Shimizu CorporationDevelopment of✓ Performance evaluation method✓ Material design method✓ Structural design methodScenario design for resource recyclingEstablishment of laws and standardsLCA for CO2 emission and reduction
Particle
Calcium bicarbonate
solution
溶液の蒸発など
Calcium bicarbonate solutionPJ-I
“Production of CCC”
The University of Tokyo
Tokyo University of Science
Taiheiyo CementParticle
Evaporation of solution, etc.
Production of CCC raw materials
Concrete
Waste
Structures
CCC Products
Production of CCC
CO2
Recycledconcreteaggregate
CO2
Calciumbicarbonatesolution Ca Ca Ca
CO2
CO2CO2
Ca CO2CO2
Ca
Concrete waste
Air
Calcium bicarbonate solution
CaCO3 precipitation
between particles
by- temperature change- pH change- evaporation
Characteristics and Implementation of CCC◆ Completely different hardening mechanism
➡ Calcium carbonate precipitation between crushed concrete waste
◆ Carbon negative or neutral
➡ CCUS equivalent to CO2 emitted by cement concrete
◆ Local production for local utilization
➡ CO2 and concrete structures that are ubiquitous
◆ Completely recyclable
➡ Recyclable as many times as you like with negligible CO2 emission
Year Development and disseminationEstablishment & revision of laws
and standards
2023 Compressive strength with 12 MPa ①Revision of Building Standard Law
of Japan
②Development of Japanese Industrial
Standards for CCC
③Institutional technical guidelines for
design and construction of CCC
④International standards for CCC
2025 Construction of mock-up structure
2030 Construction of several low-rise CCC buildings
1.725 times increase every year
2050 50% of concrete structures made of CCC
By 2050, CO2 to be captured, utilized & stored as CCC
World 2,500 million tonsJapan 31 million tons
After 2050
Concrete will become
carbon neutral like wood.
October 6th, 2021 C4S Research and Development Project [email protected] 5
October 6th, 2021 C4S Research and Development Project
Thank you for your kind attention!
Save the earth! With CCC!!