mortar
Enable an agent to identify construction mortar, assess its fresh or hardened condition, and judge its suitability for bonding, bedding, jointing, or repairing masonry.
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.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to identify construction mortar, assess its fresh or hardened condition, and judge its suitability for bonding, bedding, jointing, or repairing masonry.
Mortar is a workable mixture of one or more binders, fine aggregate and a mixing liquid, usually water, that sets or hardens to bond masonry units, fill joints or form surface finishes.
It can be Compare a mortar formulation and documented performance with a specified masonry use.; Assess whether a fresh batch remains suitable for placement using its mixing history and measured condition.; Identify required preparation and curing conditions from the binder system and application evidence.; Evaluate candidate repair mortars against the mechanical and moisture behaviour of existing masonry.; Select relevant sampling and tests when mortar condition or performance is uncertain.; Determine handling, storage, and disposal requirements from formulation-specific safety information..
Distinguishing features
Identify the construction-material sense through composition and intended use; the name alone also denotes unrelated equipment.
Recognise a binder-based mixture typically containing fine aggregate and mixing liquid, rather than treating mortar as a pure chemical substance.
Distinguish mortar from cement or lime by separating the formulated mixture from its binder constituents.
Distinguish masonry mortar from concrete through aggregate specification and intended joint or bedding function; appearance alone is insufficient.
Distinguish mortar from grout through declared placement purpose and fresh-property requirements, since composition can overlap.
Scope
+ Binder, fine aggregate, water, admixture, and additive composition
+ Factory-produced and site-mixed mortar, including dry, fresh, and hardened states
+ Mortar intended for masonry bedding, jointing, pointing, and associated repairs
+ Fresh workability, usable working time, and hardening conditions
+ Hardened mechanical, moisture, dimensional, and durability properties
+ Material compatibility, constituent-dependent hazards, and batch traceability
- Mortar weapons and mortar-and-pestle vessels
- Masonry units, completed walls, and their structural design
- Concrete and grout as separately specified construction materials
- Plaster, render, screed, and tile adhesive systems unless registry evidence explicitly includes them
- Mixers, application tools, and construction operations as independent things
- Cement, lime, sand, and other constituents as standalone materials
Characteristics
- Intended mortar use
- bedding; jointing; pointing; masonry repair; other declared use Suitability depends on the function and exposure of the mortar.
- Binder system
- air lime; hydraulic lime; cement; blended binder; other documented system The binder system affects hardening, working behaviour, and compatibility.
- Constituent proportions
- mass fraction or volume ratio, with batching basis and moisture corrections Ratios cannot be compared reliably without knowing their measurement basis.
- Fine aggregate grading
- sieve opening in mm and cumulative percentage passing Grading influences joint suitability, water demand, and texture.
- Supply and material state
- dry premix; supplied wet; freshly mixed; stiffening; hardened; deteriorated Different states permit different handling, application, and assessment actions.
- Fresh consistency
- flow, penetration, or other result with units, method, and elapsed time Consistency helps determine whether mortar can fill and form its intended joints.
- Usable working time
- minutes or hours under recorded temperature, humidity, and handling conditions An agent needs evidence that a batch remains usable before recommending placement.
- Compressive strength
- MPa with test method, specimen preparation, age, and conditioning Strength supports specification checks but cannot alone establish suitability.
- Bond to masonry unit
- identified unit and surface condition linked to bond test method and result Bond is a property of the mortar-unit combination and preparation conditions.
- Moisture transport
- capillary absorption and vapour transmission results with method-specific units Moisture behaviour affects drying and compatibility with adjoining masonry.
- Dimensional response
- shrinkage or expansion in mm/m, with age and conditioning Dimensional change can contribute to cracking and joint separation.
- Declared classification and hazard identity
- product or recipe linked to applicable specification, classification, and safety documentation Mortar classes and hazards depend on the formulation and governing documentation; a universal chemical identifier is inappropriate.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.mortar
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 19 findings · 29 questions.
Mortar identity and formulation Establish which construction mortar is represented and what its formulation contains.
Mortar is a family of mixtures whose intended use and constituents determine meaningful assessment.
Construction sense and use
Resolve the registry sense and the material's declared application.
Mortar use boundary
Record evidence for the construction-material sense and distinguish masonry mortar from overlapping material categories.
- Does the registry provenance confirm construction mortar, and which applications does it include? definition
- What declared use or specification distinguishes this material from grout, concrete, render, or adhesive? boundary
Binder, aggregate, and additions
Describe the formulation without treating the mixture as a single chemical species.
Documented mortar recipe
Connect binder identity, aggregate grading, mixing liquid, and additions to explicit proportioning evidence.
- Which binders, aggregates, admixtures, and additives are documented for this mortar? provenance
- What are their proportions, and are these measured by mass or volume with aggregate moisture accounted for? measurement
Fresh mortar usability Describe how supplied or mixed mortar reaches and retains a usable placement condition.
A suitable formulation can become unsuitable through incorrect mixing, water adjustment, storage, or delay.
Supply and mixing history
Track the preparation history relevant to the current batch.
Batch preparation condition
Relate supply form, storage, batching, and mixing to the mortar being assessed.
- Was the mortar supplied dry, supplied wet, or site-batched, and what storage and mixing history is recorded? provenance
- How much water was introduced, including subsequent additions, and what mixing procedure was followed? measurement
Placement window
Assess consistency and elapsed time against the conditions of intended placement.
Current working condition
Establish whether the batch can still form adequately filled joints under its documented use conditions.
- What consistency, segregation, or premature stiffening is observed, using which assessment method and at what elapsed time? measurement
- Do the formulation instructions and current conditions permit placement or water adjustment, or require rejection? action
Hardening and performance Connect hardening conditions with measured properties of hardened mortar.
Age alone does not establish mortar readiness, and results require formulation and conditioning context.
Hardening conditions
Identify the relevant hardening mechanisms and environmental history.
Binder-dependent development
Record how the binder develops its hardened state and which conditions support or impede that development.
- Which hardening mechanisms are documented for this binder system, including hydration or carbonation where relevant? definition
- What temperature, moisture, exposure, and protection history accompanied hardening? provenance
Mechanical and dimensional properties
Assess strength and dimensional behaviour with explicit test context.
Qualified performance results
Keep measured performance attached to specimen preparation, test age, conditioning, and applicable acceptance criteria.
- What strength and dimensional-change results are available, with methods, units, specimen types, and ages? measurement
- Which results are relevant to the intended use, and what evidence supports applying laboratory results to the placed mortar? boundary
Masonry compatibility and deterioration Assess mortar in relation to masonry units, existing joints, and exposure.
Mortar suitability depends on interactions with adjoining materials and cannot be reduced to maximum strength.
Unit and existing mortar interface
Describe the material pairing and joint conditions that affect adhesion and compatibility.
Compatible joint material
Relate mortar properties to unit suction, surface condition, joint geometry, and existing mortar.
- Which masonry units and existing mortars will contact it, and what joint dimensions and surface conditions apply? boundary
- What bond and compatibility evidence supports using this mortar with that masonry combination? provenance
Moisture and exposure response
Record moisture transport, exposure demands, and observed deterioration.
Exposure-specific condition
Distinguish observed cracking, erosion, debonding, and salt effects from unverified explanations of their causes.
- What moisture-transport results and evidence of wetting, freezing, salts, or chemical exposure are available? measurement
- Which deterioration signs warrant further testing, monitoring, or a repair assessment before selecting replacement mortar? action
Specification, traceability, and safe use Attach classifications, acceptance evidence, and handling requirements to the actual formulation or batch.
Generic mortar labels do not establish performance equivalence or formulation-specific hazards.
Classification and batch evidence
Identify the specification system and evidence behind declared properties.
Traceable mortar declaration
Link the mortar to its recipe or product, batch, specification edition, and supporting records.
- Which product or controlled recipe, batch identifier, and specification edition define this mortar? provenance
- Is acceptance based on prescribed proportions, tested performance, or another documented route, and what evidence is required? definition
State-dependent handling
Determine hazards and controls for dry, wet, and hardened mortar activities.
Formulation-specific exposure controls
Use constituent and safety evidence to assess dust, wet contact, and cutting or removal activities.
- What safety documentation identifies relevant hazards for this formulation in dry, wet, and hardened states? provenance
- What handling, exposure-control, storage, and waste requirements apply to the proposed activity and jurisdiction? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- The PHY.MAT domain supports the construction-material sense; the registry supplies no explicit definition.
- Mortar is a family of mixtures with no single universal CAS number, melting point or hazard classification; composition and product documentation govern these details.
- Standard editions, local adoption, strength requirements and test conditions require verification before specification; no sources were consulted for this recall.
- Which of these check these first hold for the sense of mortar this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Lime mortar
- Cement mortar
- Cement-lime mortar
- Gypsum mortar
- Earthen mortar
- Polymer-modified mortar
- Which of these kinds and varieties hold for the sense of mortar this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- ASTM C270 mortar type - M, S, N or O - Specification categories for unit masonry mortar; these are not chemical identifiers.
- EN 998-2 compressive-strength designation - M followed by a strength value, such as M5 - The number denotes the specified compressive-strength level in N/mm²; this scheme is distinct from ASTM mortar types.
- Which of these identifiers and schemes hold for the sense of mortar this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- ASTM International ASTM C270: Standard Specification for Mortar for Unit Masonry.
- ASTM International ASTM C780: Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry.
- European Committee for Standardization EN 998-2: Specification for mortar for masonry - Masonry mortar.
- European Committee for Standardization EN 998-1: Specification for mortar for masonry - Rendering and plastering mortar.
- European Committee for Standardization EN 1015 series: Methods of test for mortar for masonry.
- Which of these standards and regulation hold for the sense of mortar this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Bedding and bonding bricks, blocks and stone in masonry.
- Distributing loads across masonry bed joints.
- Pointing and repointing exposed masonry joints.
- Rendering walls and forming compatible plaster finishes.
- Repairing historic masonry with mortar selected for compatibility with the existing fabric.
- Which of these real-world use hold for the sense of mortar this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Conventional masonry bed-joint thickness - Approximately 10; thin-layer systems and irregular stonework differ substantially. - mm
- Which of these typical measurements hold for the sense of mortar this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Drying shrinkage, excessive water or inadequate curing can cause cracking and weak joints.
- Poor substrate preparation or unsuitable water absorption can impair bond.
- Freeze-thaw cycling and salt crystallization can damage susceptible mortar, particularly when saturated.
- Mortar that is too stiff or insufficiently permeable for adjacent masonry can contribute to damage in the masonry units.
- Wet cementitious or lime mortar can cause alkaline skin burns and eye injury; handling dry ingredients or cutting hardened mortar can generate hazardous dust, including respirable crystalline silica where present.
- Which of these failure modes and hazards hold for the sense of mortar this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- North American specifications commonly use ASTM mortar types, while European specifications commonly use EN classifications; these are not directly interchangeable.
- Binder selection and joint detailing vary with local masonry materials, climate and conservation practice.
- The terms mortar, render, plaster and stucco overlap differently across regions and trades.
- Which of these regional variation hold for the sense of mortar this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Concrete - Conventional concrete includes coarse aggregate and forms bulk structural elements; mortar generally uses fine aggregate and serves as a bedding, jointing or finishing material.
- Cement - Cement is a binder ingredient; mortar is a formulated mixture containing binder and fine aggregate.
- Grout - Grout is formulated for placement into gaps or voids, often by flowing or pumping; masonry mortar is formulated primarily for bedding and bonding units.
- Plaster - Plaster identifies a surface-finishing material or application; some plaster formulations also qualify as mortar, so the categories overlap.
- Mortar and pestle - The mortar is a grinding vessel, not a construction mixture.
- Mortar weapon - This is a projectile-launching weapon, not a material.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of mortar this model covers, and on what evidence? provenance
What the second pass must settle
- Does the originating registry explicitly mean masonry mortar, or does it include rendering, refractory, polymer, or other specialist mortars?
- Does an existing Vercy world model already cover this construction-material concept and therefore provide its authoritative model?
- Which specification systems and editions must be supported, and which classifications have defensible mappings across them?
- Which compatibility tests and acceptance criteria are appropriate for historic, porous, or mechanically weak masonry?
- What formulation-specific evidence is available for usable working time, curing requirements, durability, and hazards?