Non-destructive testing of concrete.

Details

• Creators:
  Rushing, Hollis B. ; Burt, James O.
• Corporate Creators:
  Louisiana. Dept. of Transportation and Development
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Concrete Concrete Mixing Water Laboratory Tests Nondestructive Tests Ultrasonic Tests
• Publication/ Report Number:
  51
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana. Dept. of Highways
• Abstract:
  This research project was initiated to evaluate the performance of an ultrasonic testing device device in predicting compressive strengths from tests performed on samples of fresh concrete.
  
  The initial phase of this study involved laboratory peroration of concrete cylinders water cement ratios. These were tested using ultrasonic equipment and the results were to be used in developing standard curves for predicting compressive strengths of fresh concrete. Had the laboratory results proved satisfactory, the next phase was to correlate the ultrasonic results taken in the field on actual construction sites with the compressive strengths of the roadway cylinders. Hopefully, as a result of the findings of this study an ultrasonic concrete testing program could be implemented, whereby concrete not conforming to specification requirements for compressive strength could be rejected prior to being placed in a structure.
  
  Results of the laboratory phase of the project were not encouraging. Very little predictability of compressive strength on sad and gravel mixes was possible until several hours after addition of water to toe mixes. Experimentation with more homegeneous sand mixes yielded no better results. Further investigation with the present available equipment seems unwarranted.
  
  
• Format:
  PDF
• Funding:
  Research Project No. 69-1C ; Louisiana HPR 1 (8)
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:d9dc02147c02cbb4edce15352db1cad9078bc4091f2dc0e8bed6b2eafa498181196c64294194652b515cef040650db2bf27c8a5df042a8b2c55b020c3d167bae
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/21987/dot_21987_DS1.pdf
• File Type:
  [PDF - 1.27 MB ]