TQ17244 B 10070389(2008)030804

( 621010) HF (3 )

HF

kg FAHF 12mL 6min 2d

Study on excitationtechnology oflow calcium fly ash

Zhao HaijunYan YunHu Zhihua(southwest University of Science and TechnologyMianyangSichuan62101~ AbstractExcited low calcium fly ash by HF acid as stimulator and grindingThe experiment is designed with cross method[L9(3 ) set the strength as the exam indexstudied the effect of the HF mixing amountmixing time and the other main factors on the activa-

tion of the fly ashCombined with the other factors as economicoperationfly ash activityetca best appropriate process is that

1 2mL HF in every kilogram of fly ashand the mixing time is 6minthe maturing time is two daysFinallyproduced geopolymeric

cement use the activated fly ash

Key wordslow calcium fly ashactivityHFgeopolymeric cementstrength

0

l (GHPC) 150 oC ( )

[2-81HF

1

11 F

2741 mVkg 45 m4668 333 m 80( 1) 1

1 w(Si w(Al O ) (Fe O )w(CaO)w(MgO)w(SO ) (K O)w(NaO) (P205)w(Ti

5805 283 467 157 172 087 276 032 021 197

2154 628 391 5900 299 179 041 225

2 1 87 [w(SiO2)w(A1203)] 2CaO2 (051061)

8

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001 01 1 10 100 1000 p,m

1

12 PO 425R

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2

21 (

3) HF pH

2

50 4 5 28d

A(HF)C( ) B() D()

2

3

4

l0(22)=9O0Fo(22)=19O0Fo (22)=3900 0(22)=99O0

5

9

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28 d A>C>B>D A3B2C2 50 20 mL9 min 2 do 22 221 HF

50 9 min 1 d(HF)(48 121620mLkg) 6(X0x ) 343 4 12 mLkg 12 mLkg 222

50 HF

6 (HF)

(mLkg ) 3d 7d 28d 3d 7d 28d

10

(mLkg ) 3

~(mLkg ) 4

12mLkg 1 d (3691215min) 75 656 6 min 6 min

7

X0

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X7

X8

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2650 3750

2850 4350

2850 4300

4000 705 1370

6150 805 16o0

6800 880 1860

6850 885 1 885

2050

25-30

31-35

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X9 12 2900 4550 7350 885 19_30 3180

X10 l5 2950 4500 7350 905 1945 3195

min

223 50FA HF 12

mLkg 6 min f01234 d) 8 78 7 8 2 d 2d 2 d HF2 d 224 HF

m

BdW

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0 0 0 0

l

7 d

8 d

HF 50 HF 12 mL6 rain2 do X16 50 X0 9 9

40 rnrnx40 rnrnxl60nqnq 1 d 10 10 HF

9 X16 X0 MPa

10 HF MPa MPa 7d 28d 7d 28d

268 403 1321 1632

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(2) HF 12mL 6rain2d

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6773

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2008 3

()(20071218)

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