Statements (49)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:cement
|
| gptkbp:color |
Gray
White |
| gptkbp:component |
Gypsum
Clinker Calcium aluminates Calcium aluminoferrites Calcium silicates |
| gptkbp:compressiveStrength |
~20-50 MPa (28 days)
|
| gptkbp:countryOfOrigin |
gptkb:United_Kingdom
|
| gptkbp:density |
~1440 kg/m³ (bulk)
|
| gptkbp:developedBy |
gptkb:Joseph_Aspdin
|
| gptkbp:emits |
CO2 during production
|
| gptkbp:firstPatented |
1824
|
| https://www.w3.org/2000/01/rdf-schema#label |
Portland Cement
|
| gptkbp:hydrationProduct |
Calcium hydroxide
Calcium silicate hydrate |
| gptkbp:mainRawMaterial |
gptkb:ceramics
limestone Iron ore Sand |
| gptkbp:namedAfter |
Portland stone
|
| gptkbp:producedBy |
Calcination of limestone and clay
|
| gptkbp:riskFactor |
Eye irritation
Skin irritation Respiratory issues |
| gptkbp:setInPeriod |
Final: 10 hours (typical)
Initial: 45 minutes (typical) |
| gptkbp:solubility |
Insoluble in water
|
| gptkbp:standardizedBy |
gptkb:ASTM_International
gptkb:EN_197-1 |
| gptkbp:type |
Low Heat Portland Cement
Ordinary Portland Cement (OPC) Portland Pozzolana Cement (PPC) Rapid Hardening Portland Cement Sulfate Resisting Portland Cement White Portland Cement |
| gptkbp:usedFor |
Construction
Mortar production Concrete production |
| gptkbp:usedIn |
gptkb:Roads
gptkb:Foundations Bridges Buildings Dams Tunnels Precast concrete products |
| gptkbp:bfsParent |
gptkb:Kwekwe,_Zimbabwe
|
| gptkbp:bfsLayer |
7
|