Test Items

unit

National standard

Test result

conclusion

tricalcium silicate

%

≤ 55.0

46.6

Qualified

tricalcium aluminate

%

≤ 5.0

2.3

Qualified

loss on  lgnition

%

≤3.0

2.5

Qualified

magnesium oxide

%

≤ 5.0

3.7

Qualified

sulfur trioxide

%

≤ 2.5

2.2

Qualified

Insoluble residue

%

≤ 1.5

1.05

Qualified

Specific surface

m2/kg

≥280

423

Qualified

soundness

/

qualified

Qualified

initial setting time

Min

≥45

170

Qualified

final setting time

Min

≤600

230

Qualified

Alkali content*

%

≤0.6

/

Qualified

Sulfate resistance

%

≤0.04

0.025

Qualified

bending strength

ISO

3 days

Mpa

≥3.0

5.1

Qualified

28 days

≥6.5

7.2

Qualified

Compressive strength

3 days

Mpa

≥10.0

21.0

Qualified

28 days

≥32.5

36.5

Qualified