*

, , , , , , F.=6080N/mm2 ,, AE

: ,, AE , , ,

, ,, , , ,

1.

,

,

,ASTM TypeIV ,1938

1),

, , ,

1953JIS

,1970

, ,

, ,

2)

,1980 ,

,

3)

, , ,

,

, ,

,

,,

,

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4),

5)7), F=80N/Mm2

8)11)

, ,,

,

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, ,,

40%

,

6), 1 ,2 3

,Na,K,P

, CS

C2S,'-C2S

CS

, ,

, ,

(3CaO3Al203CaSO4)

Cl1A7CaF2 , * / 5

( )

16

,C2S ,

C2S3),

, ,

, 45%4000cm2/g (

), 60%3300cm2/g ( )2

1,

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,

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,14), ,

,15)

1 12)13)

1)JISR5201 2)JISR5203 ( )

Current Status of Belite Rich Cement

By Toyoharu Nawa

Concrete Journal, Vol. 34, No. 12, pp. 16-25, Dec. 1996

Synopsis Recent remarkable changes in construction environment are demanding improved technology for pro-

duction of high performance concrete with low heat, far greater workability and high strength. With these points

as background, belite rich cements which were first developed as a low heat cement, are being applied to high

strength and highly flowable concrete and/or low heat and high strength concrete with a design strength F, in the range of 60 to 80 N/mm2, and their effectiveness is being recognized. This paper outlines the current status of be-

lite rich cement in terms of its type, and discusses its action mechanisms for fluidity and strength development

from the viewpoints of selectively nonuniform absorption of AE and highrange water reducing agent and the hy-

dration reaction of the cement compounds, respectively. Finally, the typical properties of concrete made with belite

rich cement are introduced and compared with ordinary Portland cement.

Keywords : belite rich cement, high fluidity, AE and highrange water reducing agent, selectively nonuniform

absorption, steric repulsion, high strength, hydration reaction, porosity, transition zone, high tem-

perature curing, viscosity, concrete pumping, autogenous shrinkage

Vol.34, No.12, 1996.12 17

,,

14), ,

,,

3.2

1,2,

AE

16)

,

, C3A

17)2,1 C3AC4AF

C3A

C4AF

3.3

,(VM)

(Vv)14), ,

,

,

,

VM ,

VM Vv

VM

VM==(4/3)TBCi2(H/2)2(3+2+H/2)

(1),k:,T:,B:

,Ci:,:

(1) ,VM

(Ci) , ,

3,

AE

16),

,

,(1),(1)

,, 1 16)

( ,W/(=0.3)

2 C3A+C4AF 16)

3 16)

(W/(7=O.5,20C)

2 , 16)

18

C3AC4AF

, ,C3S

C2S C3AC4AF 15)AE ,C3AC4AF,C3S

C2S 18)19)

4,C3S 2(t) AE

16)t1, ,

C3A

,

AE ,C3AC4AF,

C3SC2S

, AE

,

,C3AC4AF

, ,

AE ,

3.4

20)22), ,

,,

(1),C3A, ,

AE

,

, ,Hesselink

23),

, ,

bridging(VP)

2 bridge (V.p)

VpVp ,2

,23)

AE ,

,,bridging

, 1,

, C3A,

,C3SC2S

,

, bridging,

,

, ,,

,

,

3.5

,

24) ,

, 11m

25)

, ,

24), ,

5,

4 C3S

(W/C==o.35)16)

5 (W/C=0.3)16)

Vo1.34, No.12, 1996.12 19

16) ,

, ,C3AC4AF

4.

4.1

(1)

Ca2+,OH, ,

, , 1

,

26)

,W/C=0.3

,91 90%27), ,

, , ,

, , ,100 ,

28),

,3 27)91,W/C=0.340%,W/C=0.5,

26),

,

29),C3S

C-S-H,

30),

Ca/Si, 1.82, 1.98

29), Ca(OH)2

, Ca/Si

, 29)

(2) ,

,

, , AE

,

, 6,

(3nm2m)31)

, , ,

,

,

32), 7,

( ) ,

, () ,

,,

,

,

,

, ,

, ,

33), ,

, ,

8,

31)0.3 ,

6 31)

(L: ,N: ,H: )

7 32)

20

,Ca2+, / 1.0

,

, ,

, 0.5,, /

, ,

,

, Ca2+ ,9

31)4.2

(1)

(a)

(b)

(C)

(d)

,

10,

2),1

, ,3

(2)

,

, ,91

,W/C=0.3

90%27)

8 / 31)(L: ,N:,H:)

9 31)(L: ,N:,H: )

104)

1134)

Vol.34, No.12, 1996.12 21

, 11

,

34),

,

,

35)91

27)

12,

36) ,

,,

, ,

,

, 100

,

,

60 80, (AFt),

,1000C, (AFm)

, (C3AH6)

37), ,

, ,

13,( 3 ) 27)

, 90

,

60

14 38), ,

70AFmC3AH6

, ,

80AFm ,AFm

,

,

AFm

, ,

5.

, 1 ,

,60 ,70 ,80=9 ,80

12 36)(LPC: ,OPC:,BB:,MBF:)

1338)(0 )

14 DSC38)(0 )

22

2, F=80N/mm2

,

, ,

15,AE 4)

,

, ,16 9),

, 17

5)

, ,

Q18,

Q(=Q(1-e ,

40)

, 19,

41)

,4000cm2/g , , 35%

,

,, ,

41) ,20 28

9), 21,/

15 4)

16 9)

179)

18 40)

19 41)

20 9)

Vo1.34, No.12, 1996.12 23

9)

, ,

,

42), 22,

43), C3A/SO3,,

44)

,

,

45)46),

,

6.

,

,F=6080N/mm2

,

,

, ,,

,

, ,

, ,

,

,

,

1) : ,

,Vol.17,No.451,PP.1319,19922) : ,

, ,pp.7177,19933) :

, , ,Vo1.31,No.9,PP.1827,1993

4) : ,

,Vo1.15,No.1,pp.143148,19935) :

,

,Vol.15,No.1,pp.221226,19936) :

, ,Vo1.16,No.1,pp.277282,1994

7) : ,2 , ,pp.207212,1994

8) : ,2

, ,pp.171176,1994

9) :

Fc=600kgf/cm2 RC , ,Vol.34,No.9,pp.3139,1996

10) :

, 50 ,pp.11541155,1995

11)

: ,

,No.42,pp.3540,199412)

:

,49 ,pp.336341,1995

13) :

2 , ,pp.223224,1995

14) : , ,1990

15) :

,

,Vol.12,No.1,pp.2530,199016) :

, , ,pp.3742,1996

17) :

, 38,pp.122125,1984

18) : , ,Vo1.4,No.1,pp.91102,1993

19) i :

AE , ,No.49,pp.2629,1995

20) :

, ,Vol.16,No.1,pp.335340,1994

21) :

21K 9)

2243)

24

,

,Vol.16,No.1,PP.341346,199422) : AE ,

,Vol.34,No.5,pp.2332,199623) : , ,198524) : ,

,198225) :

,,No.433/V-5,pp139147,1991

26) :

, , ,No.45,PP.5257,1991

27) :

: ,No.45,PP5863,1991

28) :

, ,No.48,pp.6469,199429) :

, ,No.47,PP4651,1993

30) I. Odler and J. Schuppstuhl : "Combined Hydration of Tricalcium Silicate and )3-Dicalcium Silicate", Cement and Concrete Research, Vol. 12, pp. 13-20, 1982

31) r:

, ,No.48,pp.112117,1994

32) J. M. Crennan, S. A. S. ElHemaly, and H. F. W. Taylor : "Autoclaved LimeQuartz Materials I : Some Factors Influencing Strength", Cement and Concrete Research,

Vol. 7, pp. 493-502, 197733) :

, ,Vol.4,No.2,pp.18,1993

34) K. Asaga, M. Ishizaki, S. Takahashi, K. Konishi, T. Tsu-rumi, and M. Daimon : "Effect of Curing Temperature on the Hydration of Portland Cement Compounds", Proc. 9

th Int'l. Congress Chem. Cement, New Delhi, India, Vol.

IV, pp. 181-187, 1992

35) : ,

,No.50,1996( )36) , :

, ,No.47,pp.326331,199337) K. L. Scrivener and W. Wieker : Advances in Hydration

at Low, Ambient and Elevated Temperatures, 9th Int'l Congress Chem. Cement, New Delhi, India, Vol. I , pp. 449-482, 1992

38) :

,

,Vol.17,No.1,pp.469474,199539) , :

, ,Vol.16,No1,pp243248,1994

40) :

, ,Vol.17,No.1,PP.11511156,1995

41) :

, ,No.49,pp.300305,1995

42) :

, ,Vol.18,No.1,pp.699704,1996

43) :

, ,Vol.18,No.1,pp.219224,1996

44) :

, ,No.48,pp.5257,1994

45) :

, ,No41,pp.4649,198746) :

, ,No.49,PP.216221,1995

CANMET/NRC/ACI

Two-Day CANMET/NRC/ACI Int. Workshop on Developments in Repair Materials

and Strategies for the Rehabilitation of Infrastructure and Buildings

:199725 6

:Tronto(Canada)

:CANMET,NRC,ACI

:Session1 & Session2

Maintenance and Deterioration

Session 3 & Session 4

Advances in Repair Strategies and Tech-

niques

Session 5 & Session 6

Advances in Repair Materials

Session 7 & Session 8

Protection and Prevention Strategies

:US$375(1997115 US$475)

:NoelP.Mailvaganam

Repair Technologies and Strategies Group Institute for Research in Construction, NRC

Ottawa, ON, CANADA Tel : (613) 993-9713 ; Fax : (613) 954-5984

Vo1.34, No.12, 1996.12 25