concrete
Let an agent explain concrete and its composition, relay types, properties and standards from engineering sources, describe production and environmental impact, and distinguish concrete from cement, mortar and grout.
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 concrete and its composition, relay types, properties and standards from engineering sources, describe production and environmental impact, and distinguish concrete from cement, mortar and grout.
A composite construction material made of aggregate such as sand and gravel bound by a cement paste that hardens through hydration, most commonly Portland cement concrete, used for foundations, structures, pavements and dams, often reinforced with steel, fibres or textiles, and available in forms such as grout, coloured cement, fibre-reinforced concrete, textile-reinforced concrete, self-healing concrete and historical mortars such as saruj; concrete is the most used manufactured material in the world and a major source of carbon dioxide emissions.
What it is for: Building structures and infrastructure.
It can be explain composition and setting; relay types and standards; describe production and impact; distinguish from cement and mortar.
Distinguishing features
Hydration hardening
High compressive strength
Reinforcement
Carbon footprint
What it looks like
A grey stone-like material, poured as a slurry and hardened in place or precast.
Physical character
world production: about 30 billion tonnes - per year, estimates
typical compressive strength: 20-40 MPa - structural, higher for high-strength
cement share of global CO2: about 8 percent - estimates
How it is recognised
Aggregate bound by hardened cement paste
Reinforced, fibre-reinforced, textile-reinforced, self-healing, coloured; grout and saruj
Cement is the binder; mortar has no coarse aggregate; asphalt concrete uses bitumen
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is a kind of - in registry terms, when fresh
is bound by - through hydration
In practice
Families and kinds
plain and reinforced concrete
prestressed concrete
fibre-reinforced and textile-reinforced concrete
self-healing concrete
coloured and architectural concrete
grout and mortar as related materials
historical concretes such as Roman concrete and saruj
low-carbon and geopolymer concretes
Identifiers
HS 3824.50 non-refractory mortars and concretes
Standards and regulation
EN 206 and ASTM C94 concrete specifications
Eurocode 2 and ACI 318 design codes
Cement standards such as EN 197 and ASTM C150
Emissions and sustainability standards
Failure modes and hazards
Cracking, corrosion of reinforcement and alkali-silica reaction
Structural failure from poor mix or curing
Skin burns from wet concrete
High carbon emissions
Also called
+10
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.concrete
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 concrete is.
Science.
Composition
Composition and setting.
Composition
Composition.
- What is concrete made of, and how does cement hydration harden it? definition
- Is the question about concrete, cement, mortar or grout? boundary
Types
Types.
Types
Types.
- What types exist, from reinforced and prestressed to fibre-reinforced, textile-reinforced and self-healing concrete? definition
- Which entry fits the specific type? action
Engineer Design and standards.
Regulation.
Properties
Properties.
Properties
Properties.
- What are the strength, durability and workability properties of concrete, and how are they tested? measurement
- Which references are standard? provenance
Codes
Design codes.
Codes
Codes.
- What standards and codes govern concrete mixes and structural design? provenance
- Which entry fits the specific code? action
Build Production and use.
Practice.
Production
Mixing and placing.
Production
Production.
- How is concrete batched, placed, cured and finished? action
- Which sources are cited? provenance
Problems
Deterioration.
Problems
Problems.
- What causes cracking, corrosion and other deterioration, and how are structures repaired? provenance
- Which entry fits concrete degradation? action
Context History and environment.
Context.
History
History.
History
History.
- How did concrete develop from Roman and Persian mortars such as saruj to Portland cement and reinforced concrete? provenance
- Which entry fits Roman concrete? action
Environment
Environment.
Environment
Environment.
- What is the carbon footprint of concrete, and what low-carbon alternatives exist, with attribution? provenance
- Which entry fits low-carbon cement? action
What the second pass must settle
- Should reinforced concrete and cement be the primary linked entries?
- How should design codes be linked?
- The registry entry has merged aliases naming grout and historical mortars; should they be split off?