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.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
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.
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.
What it is for: Binding aggregates into concrete and mortar.
It can be explain production and types; relay standards and properties; describe environmental impact; distinguish from concrete.
Distinguishing features
Hydraulic setting
Clinker basis
Standard classes
High emissions
What it looks like
A grey powder that hardens when mixed with water.
Physical character
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
How it is recognised
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
Related models
is a kind of - in registry terms
is a kind of - in registry terms
binds - and mortar
is classified by - into CEM classes
In practice
Families and kinds
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
Identifiers
EN 197-1 common cements
ASTM C150 Portland cement
HS 2523 cement
Standards and regulation
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
Failure modes and hazards
Skin burns and dermatitis from wet cement
High carbon emissions
Confusing cement with concrete
Alkali-silica reaction in concrete
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.cement-2
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What cement is.
Science.
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.
Practice.
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.
Regulation.
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.
Context.
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
What the second pass must settle
- 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?