Shibaura Institute of Technology Central Nippon Expressway Company Professor emeritus of Yamaguchi University Professor emeritus of Teikyo University of Science

Shibaura Institute of Technology Central Nippon Expressway Company Professor emeritus of Yamaguchi University Professor emeritus of Teikyo University of Science

Life-Cycle of Structural Systems – Furuta, Frangopol & Akiyama (Eds)

© 2015 Taylor & Francis Group, London, 978-1-138-00120-6

Samples

Concentration of carbon dioxide

密度

比表面積

(g/cm

³

) (cm

²

/g) SiO

2

Al

2

O

3

Fe

2

O

3

CaO MgO SO

3

Na

2

O K

2

O TiO

2

P

2

O

5

MnO Cl N 3.16 3480 0.62 21.36 2.28 2.66 65.02 1.46 2.08 0.29 0.48 0.27 0.24 0.09 0.013

BFS 2.91 4280 0.17 34.05 14.65 ND 43.15 5.94 ND 0.26 0.28 0.57 0.01 0.33 ND

L 3.22 3440 0.64 ND ND ND ND 0.67 2.49 ND ND ND ND ND 0.004

材料 ig.loss 化学成分

40mm 5mm

2θ

Intensi ty of dif fra c ti on

0.05%_carbonated 7days 0.05%_carbonated 1day Curing 28days

N

Ca(OH) ₂ CaCO ₃ ;Calcite CaCO ₃ ;Vaterite

0 5 10 15 20

0 0.25 0.5 0.75 1 C a C O

3

(% )

表層からの深さ(mm) CaCO3

0 5 10 15 20

0 0.25 0.5 0.75 1 C a (O H )

2

(% )

表層からの深さ(mm) Ca(OH)2 Before carbonation

Ca(OH) ₂

Before carbonation CaCO ₃

depth from surface (mm) depth from surface (mm)

N CO ₂ :5%

0 5 10 15 20

0 7 14 21 28

C a C O

3

（ C P S ・ deg ）

材齢（日）

Calcite Vaterite

0 5 10 15 20

0 7 14 21 28

C a C O

3

（ C P S ・ deg ）

材齢（日）

Calcite Vaterite

0 5 10 15 20

0 7 14 21 28

C a C O

3

（ C P S ・ deg ）

材齢（日）

Calcite Vaterite

0 5 10 15 20

0 7 14 21 28

C a C O

3

（ C P S ・ deg ）

材齢（日）

Calcite Vaterite

5%

0.5%

0.05%

0%

ages (days)

0 5 10 15 20

0 7 14 21 28

C a C O

3

（ C P S ・ deg ）

材齢（日）

Calcite Vaterite

0 5 10 15 20

0 7 14 21 28

C a C O

3

（ C P S ・ deg ）

材齢（日）

Calcite Vaterite

0.05%

0%

0 5 10 15 20

0 7 14 21 28

C a C O

3

（ C P S ・ deg ）

材齢（日）

Calcite Vaterite

0 5 10 15 20

0 7 14 21 28

C a C O

3

（ C P S ・ deg ）

材齢（日）

Calcite Vaterite

5%

0.5%

ages (days)

TG-DTA test

Relationship between cement type and carbonation

0 5 10 15 20 25

0 7 14 21 28

C a C O

3

(% )

材齢(日）

0%

0.05%

0.5%

5%

N

Ages (days)

0 5 10 15 20 25

0 7 14 21 28

C a C O

3

(% )

材齢

(

日）

0%

0.05%

0.5%

5%

B50

Ages (days)

0 5 10 15 20

N B20 B50 B90 L

C a (O H ) 2 (% )

Ca(OH)2

Curing at 28days

0 5 10 15 20 25

0 7 14 21 28

C a (O H )

2

(% )

材齢

(

日）

0%

0.05%

0.5%

5%

N

Ages (days)

0 5 10 15 20 25

0 7 14 21 28

C a (O H )

2

(% )

材齢

(

日）

0%

0.05%

0.5%

5%

B50

Ages (days)

0 5 10 15 20

0 20 40 60 80

C a lci te (C P S ・ deg)

高炉スラグ粉末置換率(%)

0.05%

0.5%

5%

Carbonated at 28days

Replacement ratio of GGBFS (%)

0 5 10 15 20

0 20 40 60 80

V a te ri te (C P S ・ deg)

高炉スラグ微粉末置換率 (%)

0.05%

0.5%

5%

Carbonated at 28days

Replacement ratio of GGBFS (%)

Relationship between hydroxide and carbonation

85%

76%

64%

67%

59%

63%

50%

33%

16%

78%

66%

60%

67%

50%

40%

15%

24%

36%

33%

41%

37%

50%

67%

84%

22%

34%

40%

33%

50%

60%

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

0.05%

0.5%

5%

0.05%

0.5%

5%

0.05%

0.5%

5%

0.05%

0.5%

5%

0.05%

0.5%

5%

N B 2 0 B 5 0 B 9 0 L

Calcite Vaterite

0 5 10 15 20

0 5 10 15 20

C a lc it e (C P S ・ deg)

Ca(OH)

₂

(%) 5%

0.5%

0.05%

N B20 L

B50

B90

N BB

実環境低濃度 炭酸化 促進試験高濃度

炭酸化

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

表層からの深さ

表層からの深さ 表層からの深さ

表層からの深さ

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

H H H

炭酸化前

0 5 10 15 20

0.05% 0.5% 5%

中性化深さ (m m )

N

B50

Cement Science and concrete Technology

Proceeding of the RILEM Seminar on the Durability of Concrete Struc- tures under Normal Outdoor Exposure

Journal of Cement

and Concrete, ，