Freeze-thaw resistance of the pavement with high replacement of Portland cement

摘要

The current building industry is a dominant contributor to related carbon dioxide emission, hence gradual reduction of this trend is the main issue of researchers worldwide. The utilization of traditional Portland cement is currently reduced due to its high energy consumption during the production. Hence, number of binding materials or cement supplementary materials are intensively studied to reduce negative impact of Portland production. The long-term research is focused on the development of new type of binder, which is produced from the fly ash and other waste materials originating from the combustion of the coal in the power plants. The significant moment of the production of this hydraulic binder in the mechanical activation by the grinding. This perspective binder material was used for the production of the sets of vibro-pressed pavement blocks to replace Portland cement in the core layer. The potential of the replacement was studied in terms of freezing-thawing test. The resistance was determined on the basis of residual splitting strength after prescribed number of cycles. Conducted research confirmed previous results, that full replacement lead to the significant loss of the durability performance, however it was declared that this new binder material could replace more than 50% of Portland cement.