Takafumi Sugiyama
Ph.D., P.E.Jp(Ci)Takafumi Sugiyama is a Professor of the Environmental Material Engineering
Laboratory, Faculty of Engineering, Hokkaido University. Prof. Sugiyama’s research
efforts are concentrated in the field of civil engineering, with a focus on enhanced
performance of construction materials, supplementary cementitious materials andquality assessment of structural concretes. He earned his Ph.D. from the University ofNew Brunswick, Canada, in 1994. Before joining the faculty of Hokkaido University in
2006, Prof. Sugiyama was involved in research and education at Gunma University inGunma Prefecture, Japan. He has published his paper in international journals such as
Cement and Concrete Research, Journal of Advanced Concrete Technology, Magazine ofConcrete Research, Construction and Building Materials, ACI Materials Journal,Materials etc. and made numerous presentations in international conferences. Prof.
Sugiyama had been active in the establishment and revision of various standards andspecifications, such as the Japan Society of Civil Engineers (JSCE) Standard
Specification for Concrete Structures [Design], [Materials and Construction] and[Maintenance]. Prof. Sugiyama is a past member of the board of directors in the JapanConcrete Institute (JCI) and of the Technical Board Chairman in the Asian ConcreteFederation (ACF). Prof. Sugiyama has been presented with many awards, such as theBest Paper Award of the Japan Cement Association (JCA) in 2003 and 2013, and theJapan Concrete Institute Award (Best Paper Award) in 2006 and 2014. In 2019 Prof.
Sugiyama was awarded with Meritorious Deed Prize by Japan Concrete Institute.
Finally, he has also served on several regional and national committees, such as theHokkaido Regional Development Bureau of Ministry of Land, Infrastructure, Transportand Tourism (MLIT), Hokkaido Government and East Nippon Expressway Company Ld.
(NEXCO-East). Prof. Sugiyama currently serves as a Chairman of Concrete ResearchCommittee in Association for Civil Engineering Technology of Hokkaido.
Recent research topics:/ Investigation of enhanced performance of concrete structures in snowy cold regions,marine /salt-laden environments and extremely harsh environments.
/ Development and application of high-quality X-ray technique for cement science andconcrete technology/ Exploration of innovated construction materials with new inclusions/ Use of supplementary cementitious materials from viewpoints of environmental aspects
and enhanced concrete properties

Environmental Material Engineering Laboratory

Professor: Dr. Takafumi Sugiyama, PE

Division of Civil Engineering
Faculty of Engineering, Hokkaido University

3D Visualization and quantification

Focus Area of Research
The Environmental Material Engineering (EME) Laboratory has been
carrying out research on concrete science and technology at Hokkaido
University for more than 80 years. Recent research topics are as follows;
1 Characterization of hydrated cement systema. Exploration, alteration and degradationb. Effect of mineral additives of pozzolans and patent hydraulic materials
2 Development of innovative diagnosis with X-ray technology

Cutting edge technology to visualize microstructures and inclusions in concrete
has been developed. Crack geometry, air void system, aggregates, transportand deformed steel bar are visualized and quantified.

Crack space and aggregates
3D crack image
X-Y
X-Z

Sectional view

Y-Z

a Non-Destructive Integrated CT and XRD Methodb Synchrotron/Microforcus X-ray CT
3 Corrosion of steel reinforcement in low carbon cementitious materials
a Diagnosis for corrosion of steel arranged in multiple layers
b Effect of crack and self-healing on propagation of corrosion
4 Clarification of damage mechanism under high/low temperatures

Entrained air

a Effect of elevated temperatures for long time

VOI size = 171.1 mm3

b Repeated freeze/thaw actions

Air void system (FA-A) excluding the voids connected to the edgeor VOI boundary faces:
air content:=5.3 %void number density:= 82 mm-3
specific surface area:= 42 mm-1
Power spacing factor: 0.13 mm

5 Development of sustainable cementitious materials
a Social, economical and technical aspects
b Cooperative Social Responsibility (CSR) in construction industry

jca_pi@jcassoc.or.jp㻲㻭㻙㻭㻌㼢㼛㼕㼐㻌㼑㼝㻚㻌㼐㼕㼍㼙㼑㼠㼑㼞㻌㼐㼕㼟㼠㼞㼕㼎㼡㼠㼕㼛㼚

Slit 3SPring-8șSiliconmono-crystal

Slit 1

X-raycamera

White X-ray

Light source ofinclined
electromagnet㻢㻠㻜㻢㻝㻜㻡㻤㻜㻡㻡㻜㻡㻞㻜㻠㻥㻜㻠㻢㻜㻠㻟㻜㻠㻜㻜㻟㻣㻜㻟㻠㻜㻟㻝㻜㻞㻤㻜㻞㻡㻜㻞㻞㻜㻝㻥㻜㻣㻜㻝㻢㻜㼑㼝㻚㻌㼐㼕㼍㼙㼑㼠㼑㼞㻌㻔㼙㼕㼏㼞㼛㼙㼑㼠㼑㼞㻕Transport through crack in concrete

Slit 2Sample

㻝㻟㻜

1ª 6Vvoid _ cluster º 3«
»S
¬
¼

㻠㻜

d eq

㻝㻜㻜

Eq. void diameter

Min: 18.7 μm
Max: 660.9 μm
Count: 13949
Bin width (class width): 10 μm

Cs2CO3 Concentration[mol/L]

Solid state detector㼒㼞㼑㼝㼡㼑㼚㼏㼥This innovative method developed by Prof. Sugiyama`s group allows to obtain
CT image and XRD data at the required area. Based on CT image regions ofinterest are specified followed by the measurement of XRD. The white X-ray istransmitted and diffraction is captured at a fixed angle(2ș . This operation isconducted without crashing specimen and data can be obtained over time.

㻝㻤㻜㻜
㻝㻢㻜㻜
㻝㻠㻜㻜
㻝㻞㻜㻜
㻝㻜㻜㻜
㻤㻜㻜
㻢㻜㻜
㻠㻜㻜
㻞㻜㻜
㻜

㻝㻜

Non-Destructive Integrated CT-XRD Method

Center of crack

10.8

Tracer transport is0.6

followed by diffusion toquick in crack space
the uncracked body.

0.40.20-8000

Outline of the system-4000
04000
Transport distance (μm)

80000.500.40
Cs2CO3 C/Cs

Low carbon high performance concreteCharacterization of low carbon high performance concrete (LCHPC) isinvestigated for long term durability by X-ray technology. Low alkali nature isalso beneficial for the reduction of alkali attack to neighbors.

0.30
0.20
0.10
0.00
0

VOI : 200 μm3

Dissolution of calcium after 1year

OPC

Leaching diffusion cell test

Cesium carbonate solution as tracer transports withincrack space. Less amount and distance for narrow crack

Caa2+2468
Depth from exposed surface (mm)10Profile of the content of cesium carbonate)100mm
PVC

Caa2+
Caa2+

Leachant :Caa2+/Pu/Pureureewwater/NaCNaCl
NCl solutions

Silica fume + Fly ash

Caa2+/Contaminants

Caa2+

Deformed steel bar in concrete

Specimenn
Xn+

Caa2+
Caa2+

: μmhigh⃰ᗘlowప㧗60
40

Total Voxel

Total Voxel

5030
20100020Total Voxel

10002040 60 80 100
LAC (cm-1)

CH

7000
6000
5000
4000
3000
2000
1000
0CSH
HUCG

UCG: unhydrated
cement grains

Total Voxel

402010505030

15040 60 80 100
LAC (cm-1)

60
Total Voxel

Increased pores due toelectrical leachingmigration test are reducedfor LCHPC as comparedwith OPC concrete.

20204060LAC (cm-1)

80

10040 60 80 100
LAC (cm-1)

Deformed steel bar with the diameter of 10mm specified in JIS G3112 is visualized

Reference and Further information

141210864200020Linear attenuation
coefficients by Synchrotron
XRCT indicate thedistribution of substancessuch as hydration products,
20 40 60 80 100 un-hydrated cement grains,
LAC (cm-1)
fly ash particles and so onin LCHPC.

(1)Takafumi Sugiyama and Michael Angelo B. Promentilla, Advancing Concrete Durability Research through X-ray Computed Tomography, Vol.19
Issue 6, pp. 730-755, 2021, DOI https://doi.org/10.3151/jact.19.730, (2)M. A. B. Promentilla et al., J. of Advanced Concrete Technology, Vol.6, No.2,pp.273-286, 2008, (3) M. A.B. Promentilla et al. , Cement and Concrete Research, Vol.39, pp.548-557, 2009, (4) T. Sugiyama et al. Cement andConcrete Research, Vol.40, pp.1265-1270, 2010, (5) M.A.B. Promentilla and T. Sugiyama, Journal of Advanced Concrete Technology, Vol.8, No.2,pp.97-111, 2010, (6) I.S. Darma et al. J. of Advanced Concrete Technology, Vol. 11, No. 10 p. 266-281, 2013, (7) M. Henry et al., Construction andBuilding Materials, 67, 37–46, 2014, (8) I. Zafar et al., Magazine of Concrete Research, 66(20), 1051-1064, 2014, (9) Henry, M. et al., Journal ofAdvanced Concrete Technology, Vol. 14, pp. 134-143, 2015, (10) M.A.B. Promentilla et al., Materials, 9(5), 388, 2016.

For further information:
https://concrete.eng.hokudai.ac.jp/