ConstructionCement Clinker
Portland cement clinker with CaO 65.71 % and C₃S 62.93 %, tested to ASTM C114 and C150.
- CaO 65.71 %
- C₃S 62.93 %
Portland Cement
Portland cement to Indonesian standard SNI 2049-2015: Type I for general construction and Type II for moderate sulfate resistance. The tables set the standard's limits next to the typical values of the product.
Types I · IIStandard SNI 2049-201528-day strength 400 kg/cm² typical
Specification
Type I
| Quality parameter | Unit | SNI 2049-2015 Type I | Typical product | Range |
|---|---|---|---|---|
| Physical properties | ||||
| Compressive strength | ||||
| 3 days | kg/cm² | min 135 | 230 | ± 20 |
| 7 days | kg/cm² | min 215 | 300 | ± 25 |
| 28 days | kg/cm² | min 300 | 400 | ± 25 |
| Blaine | m²/kg | min 280 | 355 | ± 20 |
| Air content | % | max 12 | 5.5 | ± 1 |
| Setting time | ||||
| Initial set (Vicat) | minutes | min 45 | 145 | ± 20 |
| Final set (Vicat) | minutes | max 375 | 265 | ± 20 |
| False set (Vicat) | % | min 50 | 75 | ± 15 |
| Autoclave expansion | % | max 0.8 | 0.04 | 0.02 |
| Chemical properties | ||||
| Magnesium oxide (MgO) | % | max 6.0 | 1.5 | ± 1 |
| Sulfur trioxide (SO₃) | % | max 3.0 | 2.1 | ± 0.5 |
| Loss on ignition (LOI) | % | max 5.0 | 3.8 | ± 0.7 |
| Insoluble residue | % | max 3.0 | 1.5 | ± 0.8 |
Type II
| Quality parameter | Unit | SNI 2049-2015 Type II | Typical product | Range |
|---|---|---|---|---|
| Physical properties | ||||
| Compressive strength | ||||
| 3 days | kg/cm² | min 100 | 240 | ± 20 |
| 7 days | kg/cm² | min 175 | 300 | ± 20 |
| 28 days | kg/cm² | min 300 | 400 | ± 25 |
| Blaine | m²/kg | min 280 | 335 | ± 20 |
| Air content | % | max 12 | 3 | ± 2 |
| Setting time | ||||
| Initial set (Vicat) | minutes | min 45 | 175 | ± 20 |
| Final set (Vicat) | minutes | max 375 | 300 | ± 30 |
| False set (Vicat) | % | min 50 | 89 | ± 5 |
| Autoclave expansion | % | max 0.8 | 0.03 | ± 0.02 |
| Chemical properties | ||||
| Silicon dioxide (SiO₂) | % | max 20 | 20.7 | ± 1.0 |
| Aluminium oxide (Al₂O₃) | % | max 6.0 | 4.4 | ± 0.5 |
| Ferric oxide (Fe₂O₃) | % | max 6.0 | 4.4 | ± 0.5 |
| Magnesium oxide (MgO) | % | max 6.0 | 1.4 | ± 0.2 |
| Sulfur trioxide (SO₃) | % | max 3.0 | 2.0 | ± 0.3 |
| Total alkalies | % | max 0.6 | 0.5 | ± 0.05 |
| Loss on ignition (LOI) | % | max 3.0 | 1.3 | ± 0.3 |
| Insoluble residue | % | max 1.5 | 0.3 | ± 0.3 |
| Tricalcium aluminate (C₃A) | % | max 8 | 3.0 | ± 0.5 |
From the GFTx cement specification sheet (two pages, Type I and Type II).
Frequently asked questions
Type I for general construction and Type II for moderate sulfate resistance, both to the Indonesian standard SNI 2049-2015.
The typical 28-day compressive strength is 400 kg/cm² for both types, against a minimum of 300 kg/cm² in SNI 2049-2015. At 3 days the typical values are 230 kg/cm² for Type I and 240 kg/cm² for Type II.
By the Vicat method, Type I typically sets initially after 145 minutes and finally after 265 minutes, and Type II after 175 and 300 minutes. The standard asks for at least 45 minutes initial set and at most 375 minutes final set.
The typical Blaine fineness is 355 m²/kg for Type I and 335 m²/kg for Type II, against a minimum of 280 m²/kg.
Type II is made for moderate sulfate resistance. Its specification adds limits such as tricalcium aluminate at most 8 %, with a typical value of 3.0 %, and total alkalies at most 0.6 %, with a typical value of 0.5 %.
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