Predicting ion diffusion in fly ash cement paste through particle analysis

Mass transport in concrete is an important factor to control the durability of concrete structures. Fly ash is commonly used as an additive to help reduce the mass transport of concrete. Since fly ash is a waste product, it is challenging to predict the performance of fly ash in concrete. This work uses a technique called the Particle Model to predict the reactivity and modification of the diffusion coefficient of the paste with fly ash at a 20% and 40% replacement level. The results show that the diffusion coefficient can be correctly predicted for 86% of the mixtures for 20% fly ash replacement and 95% of the mixtures for 40% fly ash replacement within the variation of the test method. This work provides a deeper understanding of the impacts of fly ash on the properties of concrete and provides a new method to predict the performance of the diffusion coefficient at different hydration times.


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  • Accession Number: 01762596
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 24 2020 3:19PM