Complete ASTM identity
The ASTM C595 Type IS (20) designation stays visible from product comparison through the pricing request.
Product specificationsPortland blast-furnace slag / ASTM C595
ASTM C595 Type IS (20)
Portland blast-furnace slag cement · 20% slag
ASTM C595 Type IS (20) with a documented 44.1 MPa 28-day result.
ASTM C595 Type IS (20) delivers a published ASTM C109 result of 44.1 MPa (approximately 6,400 psi) at 28 days and is priced under its full ASTM designation.
- ASTM C595 Type IS (20) orders
- Buyers seeking Portland blast-furnace slag cement with target 20% slag
- Projects using the published 3-, 7-, and 28-day ASTM profile
- 28-day cement-mortar strength
- ≈6,400 psi 44.1 MPa
- Results basis
- Representative product results
- Pack formats
- 42.5 kg bag · 1.5 MT FIBC
Product fit
ASTM C595 Type IS (20) with a documented 44.1 MPa 28-day result.
ASTM C595 Type IS (20) delivers a published ASTM C109 result of 44.1 MPa (approximately 6,400 psi) at 28 days and is priced under its full ASTM designation.
ASTM test methods
Strength, setting, expansion, mortar-air, fineness, and chemistry results retain their stated methods.
Built around your order
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What you’re buying
See exactly what each part of the product name means.
The designation identifies the cement family, constituents, strength class, early-strength class, and any documented performance category.
Blended hydraulic cement standard
Portland blast-furnace slag cement · target 20% slag
- Standard and designation
- ASTM C595-21 · Type IS (20)
- Cement type
- Portland blast-furnace slag cement
- Constituent / category
- ASTM C595 path · target 20% slag
- Result profile
- Representative product results
Cement-mortar strength
Compare published strength in MPa and PSI.
Compare the available test ages in the units your team uses. MPa is the reported value; PSI is a rounded conversion.
| Test age | Source result | Approx. PSI | Reference / limit | Method |
|---|---|---|---|---|
| 3 days | 21.2 MPa | ≈3,070 psi | Minimum 13 | ASTM C109 |
| 7 days | 28.9 MPa | ≈4,190 psi | Minimum 20 | ASTM C109 |
| 28 days | 44.1 MPa | ≈6,400 psi | Minimum 25 | ASTM C109 |
Build a stronger pricing briefCompare cement performance across the stated test ages, then add the project mix target to the commercial brief. Representative product results support fast comparison, with the shipment MTC or COA providing the lot-specific quality record.
Complete product specifications
See the full reported product profile.
Compare setting, fineness, soundness, chemistry, and any reported constituent or compound data for this product.
01
Reported values
setting, and physical properties
5 reported values| Property | Reported result | Reference / limit | Method |
|---|---|---|---|
| Initial setting time | 137 min | Minimum 45 | ASTM C191 |
| Final setting time | 200 min | Maximum 420 | ASTM C191 |
| Autoclave expansion | 0.05 % | Maximum 0.80 | ASTM C151 |
| Air content of mortar | 5.9 % | Maximum 12 | ASTM C185 |
| Specific surface · Blaine | 421 m²/kg | — | ASTM C204 |
02
Reported values
Chemical analysis
10 reported values| Property | Reported result | Reference / limit | Method |
|---|---|---|---|
| Loss on ignition | 2.65 % | Maximum 3.0 | ASTM C114 |
| Insoluble residue | 0.59 % | Maximum 1.0 | ASTM C114 |
| Silicon dioxide · SiO₂ | 22.87 % | — | ASTM C114 |
| Aluminium oxide · Al₂O₃ | 5.76 % | — | ASTM C114 |
| Iron oxide · Fe₂O₃ | 3.13 % | — | ASTM C114 |
| Calcium oxide · CaO | 60.67 % | — | ASTM C114 |
| Magnesium oxide · MgO | 2.12 % | — | ASTM C114 |
| Sulfur trioxide · SO₃ | 1.70 % | Maximum 3.0 | ASTM C114 |
| Potassium oxide · K₂O | 0.64 % | — | ASTM C114 |
| Sodium oxide · Na₂O | 0.13 % | — | ASTM C114 |
Published result profileRepresentative product results support fast comparison, with the shipment MTC or COA providing the lot-specific quality record.
Packing and pricing
Choose the pack that fits your operation.
Price the complete designation with your preferred pack, total quantity, timing, destination port, and FOB or CIF scope.
42.5 kg bags suit distribution; 1.5 MT FIBCs suit volume handling. Add the tonnage, timing, receiving plan, and port for a clearly scoped shipment offer.
- Choose 42.5 kg bags or 1.5 MT FIBCs.
- Add the tonnage, timing, unloading plan, and storage setup.
- Name the destination port and select FOB, CIF, or both for pricing.
Cement / pack format / destination