Title:
Resistance to Chloride Ingress of Eco-Efficient Concrete Proportioned through Particle Packing Models (PPMs)
Author(s):
M.T. de Grazia, L.F.M. Sanchez, and A. Leemann
Publication:
Symposium Paper
Volume:
362
Issue:
Appears on pages(s):
887-900
Keywords:
limestone fillers (LF), particle packing models (PPM), resistance to chloride ingress, low-carbon concrete
DOI:
10.14359/51742016
Date:
6/18/2024
Abstract:
Using particle packing models (PPMs) in combination with limestone fillers has been shown to be effective in proportioning eco-efficient concrete mixtures with reduced Portland cement content, resulting in suitable performance in fresh and short-term hardened states. However, the decrease in Portland cement and increase in limestone fillers may lower the pH of concrete, raising concerns about durability and long-term performance, potentially leading to increased corrosion of steel reinforcement in the presence of carbonation or chlorides. In this study, the performance of three eco-efficient concrete mixtures with varying cement (250, 200, and 150 kg/m3) and inert filler contents is evaluated against accelerated chloride exposure. The findings highlight the influence of the mixture proportioning and water-to-cement ratio on the resistance to chloride ingress. Ultimately, it is verified that the distance between cement particles is a major contribution towards chloride ingress.