PERFORMANCE OF REPAIR MATERIALS EXPOSED TO FLUCTUATION OF TEMPERATURE

This study evaluates the repair performance of resinous and cementitious materials exposed to static and fluctuating temperature conditions, which is of importance for the repair of concrete structures in the Arabian Gulf region. To simulate the temperature variation of concrete surfaces on typical summer days in the Arabian Gulf region, specimens were exposed to a total of 90 thermal cycles between 25 deg C and 70 deg C. The slant shear bond strengths and failure characteristics were observed at 0, 60, and 90 cycles. The results indicate that the shear slant bond strength undergoes significant reduction with thermal fluctuations because of thermal incompatibility between the concrete and the repair materials. The reduction for resinous materials varied from 9.3-20.47 percent for 60 cycles and from 18.98-36.43 percent for 90 thermal cycles. The corresponding values for the cementitious materials were 3.2-17.46 percent for 60 cycles and 8.07-34.80 percent for 90 cycles. A general observation about failure mode was that test specimens changed from crushing of concrete to combined crushing-joint failure at 60 cycles and then to a distinct joint failure at 90 thermal cycles.

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  • English

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Filing Info

  • Accession Number: 00675543
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 29 1995 12:00AM