Speaker
Description
The durability of calcium aluminate cement in aggressive environments is considered one of its competitive advantages. A property that is attracting additional attention in concrete research today is resistance to carbonation, as cement-based materials play a role as carbon sinks in the carbon neutrality strategy. Previous studies have shown that CAC concrete has a faster carbonation rate compared to OPC concrete. However, there are no consistent conclusions on the effects of carbonation on the properties of CAC and limited knowledge on how SCMs affect the carbonation process when mixed with CAC. The present study focuses on the evaluation of the carbonation resistance of mortar based on CAC without and with the addition of slag and calcined clay. The influence of carbonation was investigated on non-conversion-promoted (cured at 20°C) and conversion-promoted samples (cured at 38°C). The experimental results show that accelerated carbonation has different effects on the microstructure and mechanical properties of CAC without and with the addition of slag or calcined clay.
Affiliations
University of Zagreb, Faculty of Civil Engineering, Department of Materials, Fra Andrije Kačić-Miošić 26, 10000 Zagreb, Croatia;
Calucem d.o.o., Revelanteova 4, 52100 Pula, Croatia
| Keywords | accelerated carbonation, supplementary cementitious materials, microstructure, pore structure |
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