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Full-Text Articles in Engineering
3d Laser Scanning & Modeling System, Purdue Ect Team
3d Laser Scanning & Modeling System, Purdue Ect Team
ECT Fact Sheets
Traditional methods of measuring and modeling the surface geometry of large, complex structures or sites that require engineering or survey-grade accuracy are often inaccurate, incomplete or expensive. Inaccurate or incomplete drawings and models often lead to costly construction errors or delays. A portable, auto-scanning laser and PC system that lets users economically obtain accurate, complete, and timely as-built geometry information for large structures and sites. The system can remotely measure natural surfaces up to 100m away at the speed of 800 points per second. With spacing between adjacent points as fine as 1mm, users can capture an extremely high level …
Evaluation Of Surface (Top Down) Longitudinal Wheel Path Cracking, Terhi K. Pellinen, Geoff Rowe, Kalapi Biswas
Evaluation Of Surface (Top Down) Longitudinal Wheel Path Cracking, Terhi K. Pellinen, Geoff Rowe, Kalapi Biswas
JTRP Technical Reports
The research involved evaluating three surface cracked pavements during 2002 and 2003. A 500m section of I-65 North of Lafayette was chosen as the first site (designated as Site 1), an I-65 section in downtown Indianapolis was the second site (Site 2), and US-421 in Madison was the third site (Site 3). Site 1 had 11-year old pavement, Site 2 had 12-year old pavement and Site 3 had 4.5-year old pavement. All these sites exhibited longitudinal wheel path cracking which was later identified as top-down cracking. All sites had excellent structural capacity indicating that the top-down cracking was confined in …