Use of ground penetrating radar for construction quality assurance of concrete pavement.

Details

• Creators:
  Morcous, George ; Erdogmus, Ece
• Corporate Creators:
  University of Nebraska--Lincoln
• Corporate Contributors:
  Nebraska. Dept. of Roads ; United States. Federal Highway Administration ; United States. Department of Transportation. Federal Transit Administration
• Subject/TRT Terms:
  Concrete Construction Concrete Pavement Concrete Pavements GPR Ground Penetrating Radar Quality Assurance Radar Thickness
• Publication/ Report Number:
  SPR-P1(08) P307 ; 26-1118-0085-0001
• Resource Type:
  Tech Report
• Geographical Coverage:
  Nebraska
• Edition:
  Final report.
• Corporate Publisher:
  Nebraska Transportation Center
• Abstract:
  Extracting concrete cores is the most common method for measuring the thickness of concrete pavement for construction
  
  quality control. Although this method provides a relatively accurate thickness measurement, it is destructive, labor
  
  intensive, and time consuming. Moreover, concrete cores are usually taken approximately every 750 ft, which may be
  
  inadequate for estimating the actual thickness profile of a pavement section; however extracting more cores would
  
  damage the pavement extensively and increase the labor cost and time excessively. Ground Penetrating Radar (GPR) is a
  
  well-established technique for subsurface exploration. Recently, GPR has been used for several transportation
  
  applications, such as measuring layer thickness in asphalt pavement, locating reinforcing bars and tendons, and detecting
  
  deteriorations and anomalies in concrete structures. The main advantages of GPR are speed, accuracy, and costeffectiveness
  
  when scans are conducted on large areas. The objective of this project is to investigate the accuracy and
  
  cost-effectiveness of using GPR for measuring the thickness of concrete pavement for quality assurance purposes. The
  
  GPR systems GSSI SIR20 and SIR3000 with a high resolution 1.6 MHz ground coupled antenna were used in measuring
  
  the thickness of concrete pavement up to 14 in. thick. Several laboratory and field tests were carried out to determine the
  
  accuracy of the GPR measurement at different concrete ages and when various metal artifacts are used underneath the
  
  concrete to improve the reflectivity of the bottom surface. Testing results indicated that GPR is a cost-effective nondestructive
  
  technique for measuring the thickness of concrete pavement, compared to extracting concrete cores, and an
  
  accuracy of 1/8 in. can be achieved when appropriate reflectors and calibration cores are used.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:dd470beb5ae2dbf46278d871d71d7d3057a60a6f65060ecbf6456bf701175d17
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24741/dot_24741_DS1.pdf
• File Type:
  [PDF - 4.15 MB ]