Evaluation of the cementing efficiency factor of low-calcium fly ash for the chloride-penetration resistance of concretes: A simple approach

This paper aims at simply evaluating the cementing efficiency factor (k-value) of low-calcium fly ash (FA) for the chloride-penetration resistance of concretes using the chloride-penetration depth (x(d)). Results indicate that x(d) could be used as a concrete-durability property to obtain the k-value of FA in a simple approach compared to the chloride-diffusion coefficient. The k-value of the FA based on the x(d) was approximately higher than 2, and it increased linearly with the increment in the FA reaction degree subsequent to the start of immersion. In addition, the correlation between the k-value for the chloride-penetration resistance and that for the strength development of the concrete was obtained. (C) 2020 Elsevier Ltd. All rights reserved.

Automated summary

This study aims to evaluate the cementing efficiency factor of low-calcium fly ash for chloride-penetration resistance in concretes using chloride-penetration depth. Results show that the k-value of the fly ash based on the penetration depth was higher than 2 and increased with the degree of reaction. A correlation between the k-value for chloride-penetration resistance and concrete strength development was also identified.