Investigation of Alkali Threshold Limits and Blended Aggregate In ASR Risk-Assessed Concrete


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The alkali threshold of several aggregates originating from New Zealand were determined using a modified version of RILEM AAR-3.2 and AAR-7.1. The AAR2 accelerated mortar bar test (AMBT at 80°C) and AAR-3.2 concrete prism test (CPT at 38°C) were replaced with Australian Standard AS 1141.60.1 and 60.2 test methods, respectively, to evaluate expansion.

  • Introduction Alkali Silica Reaction 
  • ASR mechanism
  • Mitigating ASR
  • Restricting alkali contribution
  • Experimental procedure
  • Results and discussion
  • Conclusion

PhD student at University of Technology Sydney. Materials Engineer/ Lab Instructor

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Total viewing time - 20 min