Công ty cổ phần xi măng Vicem Hà Tiên
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Vicem Ha Tien Portland cement ASTM C150-TYPE I is a fine powder mixture of various minerals. It is produced by mixing calcareous minerals such as limestone, clay containing silica and alumina and heating it to 1450°C. When it cools, a clinker is formed. This clinker is then finely ground and mixed with a small quantity of 3-5% of gypsum, which has calcium sulfate in it. The amount of gypsum controls the physical properties of the eventual cement and concrete.
USES
Vicem Ha Tien Portland cement ASTM C150-TYPE I is a general-purpose cement suitable for all uses, especially for industrial and civil constructions.
This type of cement can be used to make concrete for bridges, culverts, reservoirs, reinforced concrete,...
ADVANTAGES
PACKING
STANDARDS
Vicem Ha Tien Portland cement (ASTM C150-TYPE I) conforms to American Standard ASTM C150-20 (TYPE I) has physical and chemical properties as follows:
ASTM C150-20 TYPE I
|
No.
|
Characteristic
|
Unit
|
Test method
|
Standard specification
|
Test result
|
|
Chỉ tiêu cơ lý / Physical characteristic
|
|||||
|
1.
|
Bề mặt riêng / Specific surface (Blain method)
|
cm2/g
|
ASTM C204 - 18
|
≥ 2600
|
3820
|
|
2.
|
Thời gian ninh kết/ Time of setting
|
|
|
|
|
|
Bắt đầu / Initial set
|
minute
|
ASTM C191 - 19
|
≥ 45
|
175
|
|
|
Kết thúc / Final set
|
minute
|
ASTM C191 - 19
|
≤ 375
|
215
|
|
|
3.
|
Cường độ xi măng / Compressive strength
|
|
|
|
|
|
3 ngày / 3 days
|
N/mm2
|
ASTM C109 - 16
|
≥ 12
|
22.5
|
|
|
7 ngày / 7 days
|
N/mm2
|
ASTM C109 - 16
|
≥ 19
|
29.5
|
|
|
28 ngày / 28 days
|
N/mm2
|
ASTM C109 - 16
|
≥ 28
|
40.5
|
|
|
4.
|
Độ giãn nở Autoclave / Autoclave expansion,
|
%
|
ASTM C151 - 18
|
≤ 0.8
|
0.086
|
|
5.
|
Hàm lượng bọt khí của vữa/Air content of mortar,
|
g/cm3
|
ASTM C185-15a
|
≤ 12
|
1.5
|
|
6.
|
Độ hóa cứng / False set,
|
%
|
ASTM C451 - 19
|
≥ 50
|
84.8
|
|
Chemical characteristic
|
|||||
|
7.
|
Hàm lượng SO3 / Sulfur trioxide content
|
%
|
ASTM C114 - 18
|
≤ 3.0
|
1.89
|
|
8.
|
Hàm lượng cặn không tan / Insoluble residue
|
%
|
ASTM C114 - 18
|
≤ 1.5
|
0.43
|
|
9.
|
Hàm lượng mất khi nung / Loss on ignition
|
%
|
ASTM C114 - 18
|
≤ 3.5
|
1.25
|
|
10.
|
Hàm lượng MgO / Magnesium oxide content
|
%
|
ASTM C114 - 18
|
≤ 6.0
|
2.02
|
|
11.
|
Na2O + 0.658K2O / Equivalent akalies
|
%
|
ASTM C114 - 18
|
-
|
0.42
|
