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dc.description.abstractBlack cotton soils are one of those clays with a high content of montmorillenite. These have a very high plasticity leading to high rates of expansion on wetting followed by shrinkage and considerable cracking on drying. The black cotton soils of Ethiopia have liquid limits ranging between 80 and 120 and plasticity indices of 40 to 80 (see figure l). The activity of these clays is between 0.8 and 1.5. Thus by the Skempton classification the activity of these clays is considerable and, as one would expect, swelling potential is high.en
dc.titleHighways and foundations in black cotton soilsen
ags.publisherPlaceAddis Ababa :en
ags.publisherNameUN. ECA,en
dc.coverage.spatialAFR
dc.date.accessioned2011-12-13T13:07:35Z
dc.date.available2011-12-13T13:07:35Z
dc.date.issued1973-04
dc.identifier.urihttp://hdl.handle.net/10855/11823
dc.format.extent9 p. :
dc.languageeng
dc.typeReports
uneca.subject.fulltaxonomyUNBIS::NATURAL RESOURCES AND THE ENVIRONMENT::LAND, PLANT AND SOIL RESOURCES::SOILS
uneca.subject.fulltaxonomyUNBIS::TRANSPORT AND COMMUNICATIONS::TRANSPORT POLICY AND PLANNING::TRANSPORT INFRASTRUCTURE
uneca.subject.fulltaxonomyUNBIS::TRANSPORT AND COMMUNICATIONS::LAND TRANSPORT::HIGHWAY ENGINEERING
uneca.subject.fulltaxonomyUNBIS::TRANSPORT AND COMMUNICATIONS::LAND TRANSPORT::PAVEMENTS
uneca.subject.fulltaxonomyUNBIS::TRANSPORT AND COMMUNICATIONS::LAND TRANSPORT::ROADS
uneca.subject.fulltaxonomyUNBIS::TRANSPORT AND COMMUNICATIONS::LAND TRANSPORT::HIGHWAYS
uneca.subject.fulltaxonomyUNBIS::RESSOURCES NATURELLES ET ENVIRONNEMENT::TERRAINS, RESSOURCES VEGETALES, SOLS::SOLS
uneca.subject.fulltaxonomyUNBIS::RECURSOS NATURALES Y MEDIO AMBIENTE::TIERRAS, RECURSOS VEGETALES Y SUELOS::SUELOS
uneca.subject.fulltaxonomyUNBIS::TRANSPORTS ET COMMUNICATIONS::POLITIQUE ET PLANIFICATION DES TRANSPORTS::INFRASTRUCTURE DES TRANSPORTS
uneca.subject.fulltaxonomyUNBIS::TRANSPORTE Y COMUNICACIONES::POLITICA Y PLANIFICACION DEL TRANSPORTE::INFRAESTRUCTURA DEL TRANSPORTE
uneca.subject.fulltaxonomyUNBIS::TRANSPORTS ET COMMUNICATIONS::TRANSPORT TERRESTRE::GENIE ROUTIER
uneca.subject.fulltaxonomyUNBIS::TRANSPORTE Y COMUNICACIONES::TRANSPORTE TERRESTRE::INGENIERIA DE CAMINOS
uneca.subject.fulltaxonomyUNBIS::TRANSPORTS ET COMMUNICATIONS::TRANSPORT TERRESTRE::CHAUSSEES
uneca.subject.fulltaxonomyUNBIS::TRANSPORTE Y COMUNICACIONES::TRANSPORTE TERRESTRE::PAVIMENTOS
uneca.subject.fulltaxonomyUNBIS::TRANSPORTS ET COMMUNICATIONS::TRANSPORT TERRESTRE::ROUTES
uneca.subject.fulltaxonomyUNBIS::TRANSPORTE Y COMUNICACIONES::TRANSPORTE TERRESTRE::CARRETERAS
uneca.subject.fulltaxonomyUNBIS::TRANSPORTS ET COMMUNICATIONS::TRANSPORT TERRESTRE::AUTOROUTES
uneca.subject.fulltaxonomyUNBIS::TRANSPORTE Y COMUNICACIONES::TRANSPORTE TERRESTRE::AUTOPISTAS
uneca.workflow.processedtrue
ags.creatorCorporateUnited Nations. Economic Commission for Africa
ags.creatorCorporateUnited Nations. Economic and Social Council
ags.subjectThesaurusSOILS
ags.subjectThesaurusTRANSPORT INFRASTRUCTURE
ags.subjectThesaurusHIGHWAY ENGINEERING
ags.subjectThesaurusPAVEMENTS
ags.subjectThesaurusROADS
ags.subjectThesaurusHIGHWAYS
ags.subjectThesaurusSOLS
ags.subjectThesaurusSUELOS
ags.subjectThesaurusINFRASTRUCTURE DES TRANSPORTS
ags.subjectThesaurusINFRAESTRUCTURA DEL TRANSPORTE
ags.subjectThesaurusGENIE ROUTIER
ags.subjectThesaurusINGENIERIA DE CAMINOS
ags.subjectThesaurusCHAUSSEES
ags.subjectThesaurusPAVIMENTOS
ags.subjectThesaurusROUTES
ags.subjectThesaurusCARRETERAS
ags.subjectThesaurusAUTOROUTES
ags.subjectThesaurusAUTOPISTAS
ags.subjectClassification04.01.03 Land economics
ags.subjectClassification03.04.00 Mineral resources
ags.availabilityNumber52788
ags.availabilityNumber1973
ags.availabilityLocationECA-HQ
ags.rights.termsofusepublic
ags.RNE/CN.14/HOU/103
ags.JN52788
uneca.language.supporteden


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