{"id":"https://openalex.org/keywords/subbase","display_name":"pavement subbase","description":"A structural layer of road pavement placed between the base course and the underlying subgrade to distribute loads and support the pavement.","display_name_alternatives":["sub base","pavement subbase layer","road subbase","sub-base course","subbase course"],"ids":{"openalex":"https://openalex.org/keywords/subbase","wikidata":null},"primary_topic":{"id":"https://openalex.org/T13236","display_name":"Geotechnical and construction materials studies","score":0.5238,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T13236","display_name":"Geotechnical and construction materials studies","score":0.5238,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11375","display_name":"Geotechnical Engineering and Soil Stabilization","score":0.1433,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10264","display_name":"Asphalt Pavement Performance Evaluation","score":0.1163,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"works_count":4440,"cited_by_count":18286,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/subbase","updated_date":"2026-10-22T04:07:25","created_date":"2022-04-12T19:38:12"}