ASR

1 2 3 4 5

1 541-0054 4-5-7

E-mail: shigeru-matsumoto@tech-center.or.jp 2 541-0056 4-1-3

E-mail: tsutomu-niina@hanshin-exp.co.jp 3 732-0052 2-6-31

E-mail: era@kkn.co.jp 4 551-0021 7-1-55

E-mail: dmura@chuken.co.jp 5 615-8540

E-mail: miyagawa@sme.kuciv.kyoto-u.ac.jp

1

250mm

Key Words : silane penetrant system, litium nitrite, alkali-silica reaction, controlling ASR expansion

1.

ASR

1)

2)

mm

3)

ASR

4)

ASRASR

5)

ASR

6)

1000 1000 150mm 7)

450 900mm 8)

ASR

ASR

9) 10)

ASR 11)

2.

100 100 400mm -1 200 200600mm -1

5

(1)

3 -10.05%

0.15% 2

3

8 2 16

(2)

-2 -3

-1 -1

-1

ASR

6:4 R2O 9.0kg/m3

(3)

-22

-1 2

2 40 95 R.H.2

0.05 0.150.05 0.05% 5

80.15 0.15%

7 6 8 2

0.05 5

0.15 7

5

2100 100 400mm

-412)

1 -5

100 200 300 400 500mm10 mm 100mm

1.00.05% 20 0.15 33

(4)

30.05 2008 2

0.15% 378 1

-1

-2

-3

-5

-4

-2

-2

-3 4AMeDAS

0.05% 0.033 0.087% 0.15% 0.1390.168% 2 0.05% 0.047

0.069% 0.15% 0.142 0.163%

(5)-1

100 50mm 0.001mm60kg

0.01kg0.15%

1

A/D

25 10 90R.H. 1.8 R.H.

-2

-3

0 100% R.H.4.0 R.H. -3

20 2120

26 64 45 1

400mm8

0 14 26 39 52 64 78 3.

ASR

505

101520253035404550

0.15%0.05%

-3

0

500

1000

1500

2000

2500

0123456789

10

-4

70

75

80

85

90

95

1000.15%/ / /50mm0.15%/ / /100mm0.15%/ / /200mm0.15%/ / /300mm0.15%/ / /400mm

-5

70

75

80

85

90

95

1000.15%/ / /50mm0.15%/ / /100mm0.15%/ / /200mm0.15%/ / /300mm0.15%/ / /400mm

-7

65

70

75

80

85

90

95

100

0.15%/ / /50mm0.15%/ / /50mm0.15%/ / /50mm0.15%/ / /50mm

-9 50mm

(1)-5 8 -

9 12

a) -5

912 9

70

75

80

85

90

95

1000.15%/ / /50mm0.15%/ / /100mm0.15%/ / /200mm0.15%/ / /300mm0.15%/ / /400mm

-6

70

75

80

85

90

95

100

0.15%/ / /50mm0.15%/ / /100mm0.15%/ / /200mm0.15%/ / /300mm0.15%/ / /400mm

-8

70

75

80

85

90

95

1000.15%/ / /100mm0.15%/ / /100mm0.15%/ / /100mm0.15%/ / /100mm

-10 100mm

50mm 2 6

7

70

75

80

85

90

95

1000.15%/ / /200mm0.15%/ / /200mm0.15%/ / /200mm0.15%/ / /200mm

-11 200mm

5

0

5

10

15

0 100 200 300 400 500 600

0.15%/ /0.15%/ /

-13

-2

b) -6

200mm/

12

1

20 2

70

75

80

85

90

95

1000.15%/ / /300mm0.15%/ / /300mm0.15%/ / /300mm0.15%/ / /300mm

-12 300mm

c) -7

200mm50mm 8

9 -9

d) -8

200mm

100mm50mm 8

100mm 2

e)

78-13

50mm 13%R.H.200mm

50mm 6%

(2)0.15

-14

0.50

0.40

0.30

0.20

0.10

0.00

0.10

0.200.15%/ /0.15%/ /0.15%/ /0.15%/ /

-14 0.15%

9 3 311 2

0.05 0.15%

0.153 0.15

0.15

0.05

(3)a)

-162

78-5

0.05 0.15 250mm-16

70.05% 0.15-17 250mm

0.50

0.40

0.30

0.20

0.10

0.00

0.10

0.200.05%/ /0.05%/ /0.05%/ /0.05%/ /

-15 0.05%

1 2

-5 2 1

b)

-18-3

%/ 55%

3 50 100 200300 400mm 300 400mm

25 30

c) -16 1

78 0.05% 0.15%0.2% 0.05%

0.15%50mm 65 6

7

0.10

0.00

0.10

0.20

0.30

0.10

0.00

0.10

0.20

0.30

0.10

0.00

0.10

0.20

0.30

0.10

0.00

0.10

0.20

0.30

0.10

0.00

0.10

0.20

0.30

0.10

0.00

0.10

0.20

0.30

0.10

0.00

0.10

0.20

0.30

0.40

0.50

0.10

0.00

0.10

0.20

0.30

0.40

0.50

0 50 100 150 200 250 350 450 550

-16

0.0010

0.0000

0.0010

0.0020

0.0030

0.0040

0.0050

10

0

10

20

30

40

50

0.05%/ / /250mm0.15%/ / /250mm

-17

-9d) -16 2

75%80%

85%90%

95%

0.0000

0.0005

0.0010

0.0015

0.0020

0.0025

1015

2025

%

-18

78 0.05%0.15% 0.26%

e) -16 30.05% 0.15%0.06%

50mmASR

2

f) -16 40.05% 0.48% 0.15% 0.41%

1

g)

ASR

0.1

0

0.1

0.2

0.3

0.4

0.5

0 100 200 300 400 500 600

mm

0.05%/ / 0.15%/ /0.05%/ / 0.15%/ /0.05%/ / 0.15%/ /0.05%/ 0.15%/

-19 78

0.1

0

0.1

0.2

0.3

0.4

0.5

0 100 200 300 400 500 600

mm

0.05%0.15%0.05% (0 250mm)0.15% (0 250mm)

0.226

0.175

-20 78

78-19 2

0.05% 0.15% -20

0.05% 0.15%

250mm200mm

250mm 0.05%0.05%

100mm 0.05% 0.15%

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.700.05%/ / /100mm0.05%/ / /100mm0.15%/ / /100mm0.15%/ / /100mm

-21100mm

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.700.05%/ / /200mm0.05%/ / /200mm0.15%/ / /200mm0.15%/ / /200mm

0.021+0.005= 0.016%

0.103 0.012= 0.091%

-22200mm

-21 200mm

-22

-21 0.05% 78 8 260.494% 0.200%0.294%

2 25 0.05%0.060% 0.040%

0.02%100mm 200mm

0.02% 0.274% 100mm

0.160% 0.05%0.128% 0.15%

0.032% 0.15% - 0.05% = 0.10%

200mm -22

100mm 100mm78 0.5%

200mm 0.3 0.4%100mm

0.05%0.15% 100mm

0.05%100mm

0.05% 100mm

(4)

-23 24 0.05% 0.15%

2

0.05% 0.15% 40m/m2

-23 0.05%

-24 0.15%

0

5

10

15

20

25

30

35

40

45

0.0 0.1 0.2 0.3 0.4 0.5 0.6

0.05%/ /

0.05%/ /

0.05%/ /

0.05%/ /

0.15%/ /

0.15%/ /

0.15%/ /

0.15%/ / 0

5

10

15

20

25

30

35

40

45

0.0 0.1 0.2 0.3 0.4 0.5 0.6

0.05%/ /

0.05%/ /

0.05%/ /

0.05%/ /

0.15%/ /

0.15%/ /

0.15%/ /

0.15%/ /

0

5

10

15

0.0 0.1 0.2 0.3 0.4 0.5 0.6

0.05%/ /

0.05%/ /

0.05%/ /

0.05%/ /

0.15%/ /

0.15%/ /

0.15%/ /

0.15%/ /

-25

-260.1mm

-270.2mm

-16

/

-25 27

2

0.05%0.1mm

4.

ASR

(1)a)

200 250mm -20-6 8 -14 15

-16 1 4 /

-6-16 2

b)

100mm

200mm

ASR-20

0.05%

-25

(2)

-70.06

-16 3ASR

(3)

a)

/

/

b)RC PC

5.

1

(1)

(2)

200mm250mm

(3)

(4)

(5)

(6)

1) 119

p.16 2005.

2)

635-234 pp.647-648 2008.

3)

p.11 2000. 4)

Vol.10 No.2 pp.34-39 1988. 5) 2007

pp.172-173 2007. 6) ASR

pp.38-39 2008. 7)

2 pp.35-38 2002. 8)

ASR

Vol.31 No.1 pp.1225-1230 2009. 9) Thomas, M. D. A., Hooper, R. and Stockes, D. B.: Use of

Lithium-Containing Compounds to Control Expansion in Concrete Due to Alkali-Silica Reaction, Proc. 11th Interna-tional Conference on AAR in Concrete, pp.783-792, 2000.

10) Mei, L. B., Lu, D., Deng, M. and Tang, M. S.: Expansion of Siliceous Aggregate in LiOH Solusion, 12th Internation-al Conference on AAR in Concrete, pp.399-406, 2006.

11) Collins, C. L., Ideker, J. H., Willis, G. S. and Kuritis, K. E.: Examination of the Effects of LiOH, LiCl, and LiNO3 on Alkali-silica Reaction, Cement and Concrete Reserch, Vol.34, No.8, pp.1403-1425, 2004.

12)

Vol.57 No.10 pp.987-9922009.

2010. 1. 26

FUNDAMENTAL STUDY FOR CONTROLLING ASR EXPANSION BY SILANE

PENETRANT SYSTEM AND LITIUM NITRITE PRESSURIZED INJECTION

Shigeru MATSUMOTO, Tsutomu NIINA, Kazunori ERA, Daisuke MURAHASHI and Toyoaki MIYAGAWA

To investigate the effective use of silane penetrant system for treating structures in which alkali-silica

reactions have occurred, concrete specimens were treated and subsequently exposed to outdoor weather conditions for approximately one and a half years. Expansion ratio and internal relative humidity at in-cremental distances from the impregnated surface were measured following this exposure period. Results clearly indicate that expansion is effectively inhibited up to about 250 mm from the impregnated surface, and that early treatment induces a stronger controlling of ASR expansion. Effective controlling of ASR expansion was also observed following similar outdoor exposure experiments conducted using lithium ni-trite pressurized injection.