cement
Let an agent explain cement and its types, relay production, standards and properties from engineering sources, describe environmental impact and low-carbon alternatives, and distinguish cement from concrete and mortar.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Understand What cement is.
Definition
Definition and production.
Definition
Definition.
- What is cement, and how is Portland clinker made and ground? definition
- Is the question about cement, concrete, mortar or lime? boundary
Types
Types and classes.
Types
Types.
- How do CEM I to CEM VI and ASTM types differ, and what are calcium aluminate and geopolymer cements? definition
- Which entry fits the specific class? action
Use Properties and use.
Properties
Hydration and properties.
Properties
Properties.
- How does cement hydrate, and what determines setting time and strength? provenance
- Which references are standard? provenance
Selection
Selection.
Selection
Selection.
- How is a cement class chosen for exposure, durability and sustainability? action
- Which entry fits concrete mix design? action
Impact Environment and safety.
Emissions
Emissions.
Emissions
Emissions.
- Why does cement emit so much CO2, and what low-carbon cements and carbon capture options exist, with positions attributed? provenance
- Which sources are cited? provenance
Safety
Safety.
Safety
Safety.
- What safety rules apply to handling cement and to kiln operations? provenance
- Which entry fits construction safety? action
Context History and industry.
History
History.
History
History.
- How did cement develop from Roman pozzolana to Aspdin Portland cement and modern kilns? provenance
- Which entry fits the history of cement? action
Industry
Industry.
Industry
Industry.
- How is the cement industry structured, and who are the major producers? provenance
- Which entry fits cement industry? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
- Other names and narrower kinds
- CEM I, CEM II, CEM III, CEM IV, CEM V, CEM VI, fibre cement, Sorel cement, Roman cement, blast furnace cement, Expansive Cement, Geopolymer cement
What it is Filled
A binder that sets and hardens by reaction with water and binds aggregates into concrete and mortar, chiefly Portland cement made by heating limestone and clay to clinker and grinding it with gypsum, classified in Europe by EN 197 into CEM I Portland cement and CEM II to CEM VI blended cements with slag, pozzolana, fly ash, limestone or other additions, and including other cements such as calcium aluminate and geopolymer cements; cement production is a major source of carbon dioxide emissions.
Why it exists Filled
Let an agent explain cement and its types, relay production, standards and properties from engineering sources, describe environmental impact and low-carbon alternatives, and distinguish cement from concrete and mortar.
Distinguishing features Filled
- Hydraulic setting
- Clinker basis
- Standard classes
- High emissions
What robots and AI may and may not do Filled
Must not
- Let people handle wet cement without skin and eye protection.
- Present cement as concrete or the reverse in specifications.
- Use a cement type outside its specified application in structural work.
- Wash cement waste into drains or watercourses.
Only with a human decision
- Approving cement or concrete mixes for structural use.
May
- Explain cement types and how cement sets, from industry and standards sources.
- Relay safety data on wet cement and dust.
- Distinguish cement from concrete and mortar.
Moral aspects Filled
- Wet cement causes severe chemical burns that workers often underestimate.
- Cement production is a large source of carbon emissions.
Who is affected
- Construction workers
- Building users
- Communities near plants
Owners Filled
Steward
Nobody owns the material; the producer answers for each product.
Links to other meta-models Filled
parent
- Q206615 - registry parent class
- Q863583 - registry parent class
related
- binder - in registry terms
- building material - in registry terms
- concrete - and mortar
- EN 197-1 - into CEM classes
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.cement
- Wikidata: Q45190 (https://www.wikidata.org/wiki/Q45190)
- EN: 197-1 common cements
- ASTM: C150 Portland cement
- HS: 2523 cement
Direct properties required Filled
- world production: about 4 billion tonnes - per year
- clinker kiln temperature: about 1450 C
- CO2 per tonne of cement: about 0.6-0.9 tonnes
Recognition required Filled
- Hydraulic binder
- CEM I to CEM VI under EN 197, ASTM types, calcium aluminate and geopolymer cements
- Concrete is cement plus aggregate; mortar is cement plus sand; lime is a different binder
- A grey powder that hardens when mixed with water.
Capabilities and actions required Filled
- explain production and types
- relay standards and properties
- describe environmental impact
- distinguish from concrete
Hazards and failure modes required Filled
- Skin burns and dermatitis from wet cement
- High carbon emissions
- Confusing cement with concrete
- Alkali-silica reaction in concrete
Standards and interfaces required Filled
- EN 197 and ASTM C150 cement standards
- Emissions regulation and carbon pricing for cement kilns
- Chromium VI limits in cement
- CE marking of construction products
Context of use required Filled
- Binding aggregates into concrete and mortar.
- CEM I Portland cement
- CEM II Portland composite cements
- CEM III blast furnace cements
- CEM IV pozzolanic cements
- CEM V composite cements
- CEM VI composite cements introduced in 2021
- ASTM cement types I to V
- calcium aluminate, sulfoaluminate and geopolymer cements
Sources Filled
- Wikidata item Q45190: cement - identity and sense of the item
- Wikipedia: Cement - general description of the item
Open questions
- Should Portland cement and geopolymer cement be separate primary entries?
- How should standards be linked?
- The registry entry has merged aliases naming CEM classes; should they be split off?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q45190/spec.json