MoDOT Application of Maturity Technology: Brief

Details

• Creators:
  Lemongelli, Patty ; Amos, Dave
• Corporate Creators:
  Missouri. Dept. of Transportation. Research, Development and Technology Division
• Subject/TRT Terms:
  • Compressive strength
  • Fresh concrete
  • Nondestructive tests
  • Overpasses
  • Reconstruction
  • Repairing
  • Temperature
  • Thermocouples
  • Time Highways
  • Maintenance and Preservation
  More +
• Publication/ Report Number:
  Research Investigation 93-007
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States;Missouri
• Edition:
  Brief
• Corporate Publisher:
  Missouri. Dept. of Transportation. Research, Development and Technology Division
• Abstract:
  When MoDOT repair crews were faced with emergency repair of a heavily damaged overpass on I-70 in December 2002, inspectors looked to the concrete maturity method to facilitate reconstruction operations of one of the structure’s northern bents, which was severely impacted in a tractor-trailer accident. The maturity method, a nondestructive means of estimating in-place concrete strength as a function of time and temperature, is recognized as a more reliable and timely method as opposed to testing conventional 6”x12” compressive strength cylinders. Following placement of the bent footings, columns and cap on the I-70 overpass, thermocouples were inserted in the fresh concrete and a maturity value was calculated at desired times. In-place strength was then estimated from a pre-established relationship between maturity values and compressive strength. Application of the maturity method allowed earlier form removal and completion of the I-70 bridge repairs than if concrete cylinders had been used for strength determination. As a result, the bridge was open to traffic several days earlier than anticipated had conventional methods been used.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/39071/dot_39071_DS1.pdf
• File Type:
  [PDF - 1.86 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:37cdfb8d2ad3fab761a5e5928277ae2589c7794004de8a478e0468c245651cd74f0eba46032bfcad0f6a6b454806ab93c3a8283a71b1215987e9d5a09bb66cba