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SHRINKAGE CRACKING [18 records]

Record 1 2010-12-09

English

Subject field(s)
  • Welding and Soldering (Metals)
  • Nuclear Fission Reactors
DEF

A defect triggered in the root pass of a weld in the immediate neighbourhood of the contact zone, and which spreads radially between the grains when under stress in service.

OBS

[Delayed re-heat cracking] only occurs with certain materials such as 321 type stainless steel, as it is caused by hardening of the steel due to fine precipitations of titanium carbide inside the crystalline structure. The hardening causes the plastic deformation capacity to be transferred to the periphery of the grains. For this to happen, the following conditions have to be met : a high operating temperature([higher than] 475°C for 321 steel), a geometrical discontinuity at the weld root, strain hardening at the weld root showing significant shrinkage, heavy local load, which may be due to welding stresses, a defect in the weld root(e. g. a small shrinkage crack).

Key term(s)
  • delayed reheat cracking

French

Domaine(s)
  • Soudage (Métal)
  • Réacteurs nucléaires de fission

Spanish

Save record 1

Record 2 2010-05-18

English

Subject field(s)
  • Masonry Practice
  • Joints and Connections (Construction)
DEF

An expansion joint in masonry to allow movement due to expansion and contraction.

CONT

Control joints can be formed by attaching a strip of wood, plastic, or metal to the form, for vertical surfaces ... or by pressing the strip into the fresh concrete on a slab.

CONT

Use of control joints faced with calking compound has also been recommended to control shrinkage cracking; however, this practice is marked by frequent failures to keep the joints sealed against leakage of rain. Steel joint reinforcement strengthens a concrete masonry wall, whereas control joint weaken it, and the calking in the joints requires considerable maintenance.

OBS

control joint: A joint in masonry.

French

Domaine(s)
  • Maçonnerie
  • Joints et assemblages (Construction)
DEF

Joint prévu entre deux parties d'une construction afin que puissent se produire des mouvements relatifs, perpendiculairement à ces joints, en raison de dilatations hydrothermiques.

OBS

Le terme français est un spécifique par rapport à l'anglais : le joint de dilatation s'oppose à l'action des variations thermiques alors que le «control joint» s'oppose aux mouvements et déformations des maçonneries en général.

Spanish

Campo(s) temático(s)
  • Albañilería
  • Juntas y conexiones (Construcción)
Save record 2

Record 3 2008-11-12

English

Subject field(s)
  • Roofs (Building Elements)
  • Inspection for Defects (Materials Engineering)
DEF

Surface cracking due to oxidation and shrinkage stresses, which shows as repetitive mounding of an asphalt surface, resembling the hide of an alligator.

CONT

Although heat is also a factor in the deterioration of asphalt on a roof, the real source of decay is the energy carried by the ultra-violet(UV) light of the sun, combined with the ready supply of oxygen in ozone. The "links" in asphalt molecular chains are hydrogen. The molecular bond is overcome by the strong attraction of the oxygen, which pulls the hydrogen away from the asphalt molecules. This process is called photo-oxidation, and these breaks in the "aliphatic" chain results in the shrinkage cracking common to asphalt. This phenomenon is commonly called "alligatoring" in roofing parlance, a term which describes the similarity of aged asphalt surfaces to an alligator's back.

French

Domaine(s)
  • Toitures (Éléments du bâtiment)
  • Détection des défauts des matériaux
DEF

Durcissement et rétrécissement causés par l'oxydation des enduits bitumineux exposés, qui produisent de petits monticules entre des fissures profondes qui donnent l'aspect d'une peau de crocodile.

Spanish

Save record 3

Record 4 - external organization data 2007-11-08

English

Subject field(s)
  • Waste Management
  • Mining Wastes
  • Radioactive Ores (Mining)
  • Compartment - Canadian Nuclear Safety Commission
CONT

Both GCLs [geosynthetic clay liners] and compacted clay liners(CCLs) are susceptible to shrinkage and desiccation cracking, particularly when below a GM in a composite liner.

French

Domaine(s)
  • Gestion des déchets
  • Déchets miniers
  • Minerais radioactifs (Mines métalliques)
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

La DAG [doublure d'argile géosynthétique] et les doublures d'argile compactée (DAC) sont susceptibles de rétrécir et de se fissurer par dessèchement, particulièrement lorsqu'elles se trouvent en dessous d'une membrane géotextile (MG) dans un revêtement composite.

Spanish

Save record 4

Record 5 - external organization data 2007-11-08

English

Subject field(s)
  • Waste Management
  • Mining Wastes
  • Radioactive Ores (Mining)
  • Compartment - Canadian Nuclear Safety Commission
CONT

Both GCLs [geosynthetic clay liners] and compacted clay liners(CCLs) are susceptible to shrinkage and desiccation cracking, particularly when below a GM in a composite liner.

French

Domaine(s)
  • Gestion des déchets
  • Déchets miniers
  • Minerais radioactifs (Mines métalliques)
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

La DAG [doublure d'argile géosynthétique] et les doublures d'argile compactée (DAC) sont susceptibles de rétrécir et de se fissurer par dessèchement, particulièrement lorsqu'elles se trouvent en dessous d'une membrane géotextile (MG) dans un revêtement composite.

Spanish

Save record 5

Record 6 - external organization data 2007-11-08

English

Subject field(s)
  • Translation (General)
  • Materials Engineering
  • Nuclear Power Stations
  • Compartment - Canadian Nuclear Safety Commission
CONT

Both GCLs [geosynthetic clay liners] and compacted clay liners(CCLs) are susceptible to shrinkage and desiccation cracking, particularly when below a GM [geomembrane] in a composite liner.

French

Domaine(s)
  • Traduction (Généralités)
  • Génie des matériaux
  • Centrales nucléaires
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

La DAG [doublure d'argile géosynthétique] et les doublures d'argile compactée (DAC) sont susceptibles de rétrécir et de se fissurer par dessèchement, particulièrement lorsqu'elles se trouvent en dessous d'une membrane géotextile (MG) dans un revêtement composite.

Spanish

Save record 6

Record 7 2001-06-15

English

Subject field(s)
  • Concrete Construction
CONT

Plastic shrinkage cracks should be distinguished from other early or prehardening cracks caused by settlement of the concrete around reinforcing bars, formwork movement, early age thermal cracking, or differential settlement at a change from a thin to a deep section of concrete.

French

Domaine(s)
  • Bétonnage
DEF

Phase préliminaire du durcissement du béton, d'une durée moyenne de 16 à 20 heures.

CONT

Ces essais ont montré que, pour certains bétons, les durées de prédurcissement nécessaires pour que les qualités ultérieures ne soient pas diminuées sont comprises entre 16 et 20 heures.

Key term(s)
  • pré-prise
  • pré-durcissement

Spanish

Save record 7

Record 8 2001-02-27

English

Subject field(s)
  • Concrete Construction
  • Cement Industry
  • Geochemistry
  • Environmental Studies and Analyses
CONT

Loss of concrete strength may... result from alkali-aggregate attack, particularly alkali-silica reactions. In this case, alkalis derived from either the cement, soil, waste or groundwater, reacts with any siliceous aggregates which may be present in the concrete. The result of such a reaction is concrete shrinkage, cracking and significant loss of strength.

French

Domaine(s)
  • Bétonnage
  • Cimenterie
  • Géochimie
  • Études et analyses environnementales
CONT

La réaction alcalis-silice produit des gels et des cristaux qu'on retrouve dans toutes les structures en béton dégradées, autour des granulats, dans les fissures et pores de la pâte de ciment, dans les veines ou plans de clivage des granulats, à la surface du béton sous forme d'exsudats.

CONT

Les réactions silico-alcalines des bétons sont relativement faciles à reproduire en laboratoire, elles sont accélérables et amplifiables à loisir.

OBS

alcali-réaction : Attaque [...] rare [qui] peut se produire quand le ciment est du portland et quand, au sable et aux granulats, se trouvent mêlés des éléments siliceux réactifs.

Spanish

Campo(s) temático(s)
  • Hormigonado
  • Industria del cemento
  • Geoquímica
  • Estudios y análisis del medio ambiente
Save record 8

Record 9 2001-02-27

English

Subject field(s)
  • Geochemistry
  • Environmental Studies and Analyses
  • Concrete Construction
  • Cement Industry
CONT

Loss of concrete strength may... result from alkali-aggregate attack, particularly alkali-silica reactions. In this case, alkalis derived from either the cement, soil, waste or groundwater, reacts with any siliceous aggregates which may be present in the concrete. The result of such a reaction is concrete shrinkage, cracking and significant loss of strength.

French

Domaine(s)
  • Géochimie
  • Études et analyses environnementales
  • Bétonnage
  • Cimenterie

Spanish

Campo(s) temático(s)
  • Geoquímica
  • Estudios y análisis del medio ambiente
  • Hormigonado
  • Industria del cemento
Save record 9

Record 10 1994-11-15

English

Subject field(s)
  • Types of Concrete
CONT

... since there is no bleeding water to protect the concrete from early desiccation. it will require careful curing, without which there is a risk of cracking by plastic shrinkage(shrinkage occurring before the concrete sets).

French

Domaine(s)
  • Sortes de béton
CONT

[...] il importera de soumettre [le béton] à une cure soignée, sans laquelle on s'expose à des risques de fissuration par retrait plastique (retrait s'exerçant avant la prise du béton).

Spanish

Save record 10

Record 11 1993-11-19

English

Subject field(s)
  • Silviculture
  • Plant Diseases
OBS

hypoxylon. A genus of fungi (family Xylariaceae) having effuce to hemispherical stromata and including a species (H. pruinatum) that causes a canker of poplars.

OBS

canker. An area of necrotic tissue in a woody stem or sometimes other plant organ caused by various agents(as fungi, bacteria, or toxic substances) and marked by shrinkage, cracking, and sloughing of tissue that leave an open wound surrounded by zones of callus often girdling and killing the affected stem.

French

Domaine(s)
  • Sylviculture
  • Maladies des plantes
DEF

Maladie du peuplier et de l'hêtre causée par le champignon Hypoxylon cohaerens.

OBS

chancre. Sorte de plaie des rameaux et du tronc des arbres et qui a souvent pour origine une blessure initiale par où s'introduisent divers parasites. (Le chancre est formé d'une partie centrale creuse, entourée de bourrelets cicatriciels).

Spanish

Save record 11

Record 12 1991-02-06

English

Subject field(s)
  • Silviculture
  • Plant Diseases
OBS

canker. An area of necrotic tissue in a woody stem or sometimes other plant organ caused by various agents(as fungi, bacteria, or toxic substances) and marked by shrinkage, cracking, and sloughing of tissue that leave an open wound surrounded by zones of callus often girdling and killing the affected stem.

French

Domaine(s)
  • Sylviculture
  • Maladies des plantes
DEF

Maladie du sapin causée par le champignon Pseudophacidium piceae.

OBS

chancre. Sorte de plaie des rameaux et du tronc des arbres et qui a souvent pour origine une blessure initiale par où s'introduisent divers parasites. Le chancre est formé d'une partie centrale creuse, entourée de bourrelets cicatriciels.

Spanish

Save record 12

Record 13 1991-02-06

English

Subject field(s)
  • Silviculture
  • Plant Diseases
OBS

canker. An area of necrotic tissue in a woody stem or sometimes other plant organ caused by various agents(as fungi, bacteria, or toxic substances) and marked by shrinkage, cracking, and sloughing of tissue that leave an open wound surrounded by zones of callus often girdling and killing the affected stem.

French

Domaine(s)
  • Sylviculture
  • Maladies des plantes
DEF

Maladie du pin causée par le champignon Tympanis hypopodia.

OBS

chancre. Sorte de plaie des rameaux et du tronc des arbres et qui a souvent pour origine une blessure initiale par où s'introduisent divers parasites. (Le chancre est formé d'une partie centrale creuse, entourée de bourrelets cicatriciels).

Spanish

Save record 13

Record 14 1991-02-06

English

Subject field(s)
  • Silviculture
  • Plant Diseases
OBS

canker. An area of necrotic tissue in a woody stem or sometimes other plant organ caused by various agents(as fungi, bacteria, or toxic substances) and marked by shrinkage, cracking, and sloughing of tissue that leave an open wound surrounded by zones of callus often girdling and killing the affected stem.

French

Domaine(s)
  • Sylviculture
  • Maladies des plantes
DEF

Maladie du bouleau causée par un champignon Godronia multispora ou Godronia cassandrae.

OBS

chancre. Sorte de plaie des rameaux et du tronc des arbres et qui a souvent pour origine une blessure initiale par où s'introduisent divers parasites. (Le chancre est formé d'une partie centrale creuse, entourée de bourrelets cicatriciels).

Spanish

Save record 14

Record 15 1991-02-06

English

Subject field(s)
  • Silviculture
  • Plant Diseases
OBS

neofabraea. A genus of plant-parasitic fungi (family Mollisiaceae) that form brightly colored opothecia in conidial stromata.

OBS

canker. An area of necrotic tissue in a woody stem or sometimes other plant organ caused by various agents(as fungi, bacteria, or toxic substances) and marked by shrinkage, cracking, and sloughing of tissue that leave an open wound surrounded by zones of callus often girdling and killing the affected stem.

French

Domaine(s)
  • Sylviculture
  • Maladies des plantes
DEF

Maladie du peuplier causée par le champignon Neofabrae populi.

OBS

chancre. Sorte de plaie des rameaux et du tronc des arbres et qui a souvent pour origine une blessure initiale par où s'introduisent divers parasites. (Le chancre est formé d'une partie centrale creuse, entourée de bourrelets cicatriciels).

Spanish

Save record 15

Record 16 1991-02-06

English

Subject field(s)
  • Silviculture
  • Plant Diseases
OBS

canker. An area of necrotic tissue in a woody stem or sometimes other plant organ caused by various agents(as fungi, bacteria, or toxic substances) and marked by shrinkage, cracking, and sloughing of tissue that leave an open wound surrounded by zones of callus often girdling and killing the affected stem.

French

Domaine(s)
  • Sylviculture
  • Maladies des plantes
DEF

Maladie du pin causée par le champignon Pragmopora pithya.

OBS

chancre. Sorte de plaie des rameaux et du tronc des arbres et qui a souvent pour origine une blessure initiale par où s'introduisent divers parasites. (Le chancre est formé d'une partie centrale creuse, entourée de bourrelets cicatriciels).

Spanish

Save record 16

Record 17 1991-02-06

English

Subject field(s)
  • Silviculture
  • Plant Diseases
OBS

diaporthe. A genus of ascomycetous fungi (family Valsaceae) having fusoid or ellipsoid hyaline 2-celled ascospores borne in perithecia that are embedded in diffuse or isolated stromata.

OBS

canker. An area of necrotic tissue in a woody stem or sometimes other plant organ caused by various agents(as fungi, bacteria, or toxic substances) and marked by shrinkage, cracking, and sloughing of tissue that leave an open wound surrounded by zones of callus often girdling and killing the affected stem.

French

Domaine(s)
  • Sylviculture
  • Maladies des plantes
DEF

Maladie de l'érable causée par le champignon Diaporthe dubia.

OBS

chancre. Sorte de plaie des rameaux et du tronc des arbres et qui a souvent pour origine une blessure initiale par où s'introduisent divers parasites. (Le chancre est formé d'une partie centrale creuse, entourée de bourrelets cicatriciels).

Spanish

Save record 17

Record 18 1991-02-06

English

Subject field(s)
  • Silviculture
  • Plant Diseases
OBS

canker. An area of necrotic tissue in a woody stem or sometimes other plant organ caused by various agents(as fungi, bacteria, or toxic substances) and marked by shrinkage, cracking, and sloughing of tissue that leave an open wound surrounded by zones of callus often girdling and killing the affected stem.

French

Domaine(s)
  • Sylviculture
  • Maladies des plantes
DEF

Maladie de l'érable causée par le champignon Cryptodiaporthe scerinum.

OBS

chancre. Sorte de plaie des rameaux et du tronc des arbres et qui a souvent pour origine une blessure initiale par où s'introduisent divers parasites. (Le chancre est formé d'une partie centrale creuse, entourée de bourrelets cicatriciels).

Spanish

Save record 18

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