Tenders Are Invited For Research And Development Services And Related Consultancy Services – Fe 07.0325/2024/Erb - Investigation Of Crack Formation In Asphalt Surface Layers After A Short Period Of Exposure

Research And Development Services And Related Consultancy Services – Fe 07.0325/2024/Erb - Investigation Of Crack Formation In Asphalt Surface Layers After A Short Period Of Exposure. The Evaluation Of The Latest Series Of Measurements From The Condition Recording And Assessment (Zeb) In The Network Of Federal Highways Shows A Significant Increase In The Number Of Cracks In Asphalt Surface Layers In Several Federal States. The Proportion Of Route Sections Where The Condition Value For Crack Formation Exceeds The Warning Value Has Increased By Up To 10% Between Two Successive Measurement Cycles. As Part Of A Repeated Exchange Between The Federal And State Governments And On The Basis Of Multiple Tests And Evaluations, It Was Determined That These Damage Patterns Were Also Observed On Newly Constructed Or Completely Renovated Sections Of Route With A Comparatively Short Duration. The Causal Relationships Between The Observed Crack Formation Have Not Yet Been Conclusively Clarified. However, Existing Analyzes Suggest Structural Causes. The Subject Of The Research Project Is The Scientific Investigation Of The Main Causes Of Early Crack Formation In Asphalt Surface Layers Of Newly Manufactured Asphalt Pavements. Based On The Findings Obtained, Measures To Prevent Such Damage Should Be Derived. The Results Of The Project Must Be Included In The Update Of The Relevant Technical Regulations.