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Calcium aluminate refractory cement CA70

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Product Description

Items

CA-70E

CA-70G

CA-70A

Refractoriness ℃

1650-1690

     Chemical composition %

Al2O3

68-72

CaO max

30

SiO2 max

1.0

Fe2O3 max

0.7

Na2O+K2O max

0.4

S max

0.1

Specific density g/cm3

2.95-3.05

2.95-3.05

2.95-3.05

Specific surface area m2/kg min

600

600

600

 Mortar performance

Initial setting time minutes min

30

30

30

Final setting time minutes max

360

360

360

Rupture strength Mpa


6 hr

3.0

-

-

24 hr

5.5

5.0

5.5

72 hr

6.5

6.0

6.5

Cold crushing strength Mpa


6 hr

15

-

-

24 hr

40

30

40

72 hr

50

40

50

Castable performance

corundum

Low cement

corundum

Low cement

corundum

Low cement

Water addition %

5.2

6.8

5.2

6.8

5.2

6.8

Flow value mm


Initial flow value

190

176

196

152

158

164

30 minutes

186

170

188

169

149

152

60 minutes

185

165

184

163

150

156

Cold crushing strength Mpa


24 hr room temperature

22

25

19

25

24

26

110℃ dry 24hr

90

115

76

120

91

120

1100℃ heating 6 hr

55

110

55

120

55

109


Subsidiary

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Zhengzhou Kaiyuan Refractories Co.,Ltd

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