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GRADIENT RATIO TEST [2 records]
Record 1 - internal organization data 2010-05-13
Record 1, English
Record 1, Subject field(s)
- Engineering Tests and Reliability
- Technical Textiles
- Soil Mechanics (Engineering)
Record 1, Main entry term, English
- clogging test
1, record 1, English, clogging%20test
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- clogging ratio test 1, record 1, English, clogging%20ratio%20test
correct
- gradient ratio test 2, record 1, English, gradient%20ratio%20test
correct
- soil-fabric clogging test 1, record 1, English, soil%2Dfabric%20clogging%20test
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Calhoun performed clogging tests to determine the degree of fabric clogging that might be experienced by fabric in contact with a gap-graded soil. The clogging test employed a permeameter device... Hydraulic gradient data from the soil-fabric permeameters were analyzed to determine the clogging potential of a fabric. The analysis made use of a ratio of the hydraulic gradient across the fabric plus an adjacent 1 in. of soil to the hydraulic gradient for the entire system, that is, the "clogging ratio. "A clogging ratio greater than 1 signifies fabric clogging. 1, record 1, English, - clogging%20test
Record number: 1, Textual support number: 1 OBS
clogging: the reduction of geotextile permeability occurring when fine grained material becomes trapped in or on the geotextile. 3, record 1, English, - clogging%20test
Record 1, French
Record 1, Domaine(s)
- Fiabilité, contrôle et essais (Ingénierie)
- Textiles techniques
- Mécanique des sols
Record 1, Main entry term, French
- essai de colmatage
1, record 1, French, essai%20de%20colmatage
proposal, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- essai de résistance au colmatage 1, record 1, French, essai%20de%20r%C3%A9sistance%20au%20colmatage
proposal, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 OBS
Sur le plan hydraulique, c'est surtout la permittivité (perméabilité dans le plan perpendiculaire au géotextile) et la résistance au colmatage qui sont déterminantes. Il est en particulier indésirable que de l'eau stagne au bas de la couche d'apport. 2, record 1, French, - essai%20de%20colmatage
Record number: 1, Textual support number: 2 OBS
L'eau qui circule est chargée de particules solides en suspension, celles-ci s'accumulent sur le filtre ou au sein du filtre en réduisant progressivement la perméabilité. Le débit diminue, il y a colmatage [...] Pour éviter le colmatage du filtre, on pourrait choisir un géotextile dont la texture serait plus serrée que le diamètre des particules fines, mais elle serait quasi imperméable et arrêterait même l'eau. 3, record 1, French, - essai%20de%20colmatage
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2010-02-10
Record 2, English
Record 2, Subject field(s)
- Engineering Tests and Reliability
- Man-Made Construction Materials
- Soil Mechanics (Engineering)
- Synthetic Fabrics
Record 2, Main entry term, English
- opening size
1, record 2, English, opening%20size
correct, see observation
Record 2, Abbreviations, English
Record 2, Synonyms, English
- filter opening size 2, record 2, English, filter%20opening%20size
- Of 2, record 2, English, Of
correct, see observation
- Of 2, record 2, English, Of
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
Factors influencing the filtration performance of geotextile can be classified into four categories-external conditions(hydraulic gradient and loading state) ;(bio) chemical conditions of fluent(pH, hardness(e. g. [Fe], [Mn], [Mg], [Ca]), redox potential(Eh) for iron ochre, BOD and COD of water(substrate type/concentration), osmotic pressure and dissolved oxygen) ;the properties of basement material(coefficient of uniformity(Cu), coefficient of gradation(Cc), plastic index(PI), double hydrometer ratio(DHR) for dispersive clay, particle shape and grain hardness for granular soil, compaction degree of soil and saturation degree) ;and the properties of geotextile(filtration opening size(FOS), apparent opening size(AOS), fiber density, textile bulk density(mass/area), porosity, thickness and fiber material)... screen test results clearly indicated that the height of self filtration is proportional to the constriction size(Dc) of granular filter used. Additionally, they suggested the filter opening size value should be within the range between d50 and d80 for linearly graded soil and within the flat range in gap graded soil. 2, record 2, English, - opening%20size
Record number: 2, Textual support number: 1 OBS
Symbol: Of 3, record 2, English, - opening%20size
Record number: 2, Textual support number: 2 OBS
Compare with "apparent opening size (AOS)" and "filtration opening size (FOS)." 3, record 2, English, - opening%20size
Record 2, French
Record 2, Domaine(s)
- Fiabilité, contrôle et essais (Ingénierie)
- Matériaux de construction artificiels
- Mécanique des sols
- Textiles artificiels et synthétiques
Record 2, Main entry term, French
- ouverture de filtration
1, record 2, French, ouverture%20de%20filtration
correct, feminine noun
Record 2, Abbreviations, French
- Of 1, record 2, French, Of
correct, see observation
Record 2, Synonyms, French
- diamètre de filtration 2, record 2, French, diam%C3%A8tre%20de%20filtration
correct, masculine noun
- diamètre d'ouverture de filtration 3, record 2, French, diam%C3%A8tre%20d%27ouverture%20de%20filtration
avoid, see observation, masculine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
Pour les géotextiles utilisés comme filtres, on mesurera par commodité la probabilité de passage des particules de sol d'un diamètre connu. On assimile ainsi le géotextile à un tamis. On enregistre la taille maximale des particules traversant le tamis, mesure assimilée à un diamètre, d'où l'expression «diamètre de filtration». Plusieurs principes et méthodes sont actuellement utilisés pour définir cette caractéristique : tamisage à sec de billes de verre calibrées [...]; tamisage à sec de particules de sol [...]; tamisage de sol à l'humide [...]; tamisage de sol sous régime hydrodynamique. 4, record 2, French, - ouverture%20de%20filtration
Record number: 2, Textual support number: 2 CONT
Géotextiles. Détermination du diamètre d'ouverture de filtration. [Norme ONGC (Office des normes générales du Canada) 148.1, septembre 1994.] 3, record 2, French, - ouverture%20de%20filtration
Record number: 2, Textual support number: 1 OBS
L'ouverture Of de filtration du géotextile est conventionnellement exprimée par le d95 du sol. 1, record 2, French, - ouverture%20de%20filtration
Record number: 2, Textual support number: 2 OBS
On parle d'ouverture de filtration déterminée par tamisage à sec (en anglais : AOS; apparent opening size) et d'ouverture de filtration déterminée par tamisage hydrodynamique (en anglais : FOS; filtration opening size). L'expression «diamètre d'ouverture de filtration» est pléonastique. Renseignements obtenus d'un professeur de l'École polytechnique de Montréal, qui donne un cours intitulé «Mécanique des sols expérimentale». 5, record 2, French, - ouverture%20de%20filtration
Record 2, Spanish
Record 2, Textual support, Spanish
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