Durability of Concretes Produced with Low Carbon Cements
摘要
The cement production process is a polluting activity, due to the large amounts of carbon dioxide released into the atmosphere during the production of clinker. The aim of the cement industry is to reduce the amount of pollutants released, to address the greenhouse effect. New types of cement have been introduced to the European market in recent years, with the aim of reducing the environmental footprint of cement. These new cements consist largely of pozzolanic materials, while the amount of clinkers has been reduced. Low carbon footprint cements have been fully studied regarding the development of their compressive strength, but their long-term resistance to various corrosive agents has not been sufficiently studied yet. The aim of this work is to study the behavior of concretes prepared using low carbon footprint cements against carbonation and against chloride penetration. For this purpose, six concrete mixtures were prepared with a combination of blended cements and different W/C ratios. The resistance indices against chloride penetration and against carbonation were measured. Life365 software was used to calculate the service life of structures cast with these mixtures. The service life of low carbon footprint mixtures against chloride penetration is satisfactory.