{"created":"2023-06-19T10:26:30.994161+00:00","id":5094,"links":{},"metadata":{"_buckets":{"deposit":"56d8768a-3c0c-4018-98e1-b5244095a241"},"_deposit":{"created_by":18,"id":"5094","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"5094"},"status":"published"},"_oai":{"id":"oai:muroran-it.repo.nii.ac.jp:00005094","sets":["41:227"]},"author_link":["22688"],"item_81_date_granted_17":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2011-09-29"}]},"item_81_degree_grantor_10":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_language":"ja","subitem_degreegrantor_name":"室蘭工業大学"},{"subitem_degreegrantor_language":"en","subitem_degreegrantor_name":"Muroran Institute of Technology"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"10103","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_81_degree_name_11":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（工学）","subitem_degreename_language":"ja"}]},"item_81_description_25":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_81_description_7":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"A reliable and efficient road transport system is absolutely crucial to the economic as well as social uplift of developing countries, including Pakistan. Road transport not only plays a pivotal role in cost effective transportation of freight and passengers, it provide equal opportunities of access to jobs and trade to all segments of society, thus promoting national cohesion and alleviation of poverty; which are the issues shared by almost all the developing nations around the world. Realizing the importance of road transport, a major portion of the national income of Pakistan is spent on construction and maintenance of roads. However, the economic and social benefits of an efficient road transport system are seldom realized due to accelerated deterioration and premature failure of road pavement structures. Some of the primary causes of premature failure of flexible pavement structures in Pakistan can be attributed to excessive axle loading and over inflation of truck tires, inappropriate design inputs for materials and climatic conditions, and the use of empirical pavement design method which is not truly representative of the geoenvironmental conditions prevailing in Pakistan. Flexible pavements with hot mix asphalt concrete (AC) surfacing constitutes majority of road pavements around the world, including Pakistan; predominantly due to its low initial/maintenance cost, easy and quick construction, superior riding quality and skid resistance, etc. However, the design and performance of flexible pavements includes a multitude of potentially influencing variables including the complex behavior of pavement geomaterials in each layer; resting on a variety of subgrade soils, under dynamic traffic loads and in an array of climatic conditions. Deficient knowledge or inadequate assembling and/or inappropriate handling of these variables in the design as well as construction stages may adversely affect the performance of flexible pavement structures. The recent advancement in support technologies; particularly more sophisticated laboratory and in-situ instrumentation, and much efficient computers now available for general use; have indeed facilitated the development of analytical or Mechanistic- Empirical (M-E) design systems which are capable of analyzing variabilities in all the design input. Capitalizing on these advancements, this research explores the current situation of flexible pavements in Pakistan with a view to suggesting practical proposals towards developing Mechanistic-Empirical pavement design system in Pakistan. Conclusion of this research may be summarized as follows: 1) The Mechanistic-Empirical (M-E) Pavement design approach, realistically capture the variations in all factors that influence the pavement performance, resulting in rational pavement design. 2) The performance of flexible pavement is sensitive to not only axle loading but also significantly to tire inflation pressure. The damaging influence of increase in tire pressure keeps on magnifying with each axle load increment. 3) Time-dependency has considerable effect on the deformation properties of uniformly graded crushed gravel, constituting drainable base courses. Moreover, the effect is more evident in materials with cyclic loading history. 4) A relationship between KP.FWD and K30 for base course materials (well-graded gravels) and subgrade materials (clayey soils), was found to be 2:1 and 1:1, respectively. 5) Laboratory test results and in-service performance reveal that the HS asphalt mixture has better characteristics compared to semi-flexible pavement mixtures.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_81_dissertation_number_13":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第314号"}]},"item_81_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15118/00005085","subitem_identifier_reg_type":"JaLC"}]},"item_81_subject_9":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"500","subitem_subject_scheme":"NDC"}]},"item_81_text_12":{"attribute_name":"学位の種別","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"課程博士"}]},"item_81_text_14":{"attribute_name":"報告番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"甲第314号"}]},"item_81_text_15":{"attribute_name":"学位記番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"博甲第314号"}]},"item_81_text_16":{"attribute_name":"研究科・専攻","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"工学研究科・建設工学専攻"}]},"item_81_version_type_24":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNameIdentifiers":[],"affiliationNames":[{"affiliationName":""}]}],"creatorNames":[{"creatorName":"AHMAD, Shafeeq","creatorNameLang":"en"},{"creatorName":"アマハド, シャフィーク","creatorNameLang":"ja"}],"familyNames":[{},{}],"givenNames":[{},{}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-02-15"}],"displaytype":"detail","filename":"kou-314.pdf","filesize":[{"value":"3.8 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"kou-314","objectType":"fulltext","url":"https://muroran-it.repo.nii.ac.jp/record/5094/files/kou-314.pdf"},"version_id":"2ef3e34a-3898-49a6-b1c7-7c4c2cfe076a"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"経験的理論的舗装設計","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"相対損傷指数","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"粒状材料","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"三軸試験","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"小型FWD","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"HSアスファルト混合物","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"Mechanistic-Empirical Pavement Design","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Relative Damage Factor","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Granular material","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Triaxial test","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Portable FWD","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"High stability asphalt concrete mixture","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"Proposals for Mechanistic-Empirical Pavement Design System in Pakistan","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Proposals for Mechanistic-Empirical Pavement Design System in Pakistan","subitem_title_language":"en"},{"subitem_title":"パキスタンにおける経験的理論的舗装設計システムの提案","subitem_title_language":"ja"}]},"item_type_id":"81","owner":"18","path":["227"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2012-01-30"},"publish_date":"2012-01-30","publish_status":"0","recid":"5094","relation_version_is_last":true,"title":["Proposals for Mechanistic-Empirical Pavement Design System in Pakistan"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2023-12-12T03:06:49.856695+00:00"}