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Measurement of the chloride resistance of environmentally friendly and durable concreteAlisa Machner,
Marie Helene Bjørndal,
Aljoša Šajna,
Lucija Hanžič,
Yushan Gu,
Benoit Bary,
Klaartje De Weerdt, 2020, published scientific conference contribution
Abstract: The increasing demand for concrete and thereby Portland cement, creates the need for novel low-clinker Portland composite cements. Concretes prepared with such novel composite cements need to show similar or even improved durability compared to concrete prepared with commonly used Portland composite cements. This study represents a part of the EnDurCrete project that focuses on the durability of concrete produced with novel low-clinker cements, containing high-value industrial by-products. More specifically, we investigated the chloride ingress resistance of such concrete. Concrete cylinders were submitted to chloride ingress by bulk diffusion. The chloride ingress resistance was investigated on concrete samples by %XRF scanning and chloride titration. In addition, the chloride binding capacity of these novel binders was investigated on paste samples by determining chloride binding isotherms for both binders. In the next step of the project, these experimental results will be matched with an advanced model, which is being developed within the project. By combining modelling with experimental verification, we aim to reach a better understanding of the fundamental chloride ingress mechanisms acting on novel types of concrete. The overall goal of the work is to produce a concrete with lower cost, lower environmental footprint and with verified similar or improved durability.
Keywords: chloride ingress, durability, novel binders, Low C02, sustainability, concrete
Published in DiRROS: 19.01.2024; Views: 198; Downloads: 90
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