SELF - COMPACTING CONCRETE CO2 UPTAKE

Among a number of the factors related to sustainability of concrete, the carbon footprint is one of the most discussed. Thus a lot of attention is paid to the opportunities of CO(2)e emission reduction in global carbon footprint calculation. One of such possibilities is assuming the CO2 sequestration in process of concrete carbonation. In the paper the results of three SCC mixtures carbonation, after 56, 112 and 168 days in two types of sample form, described in literature are presented. One type of form was a typical cubic sample and the other was a crushed concrete. A grain size of a crushed concrete was chosen to imitate a concrete rumble after a concrete demolish. Controlled conditions of 1% concentration of CO2, 21 degrees C temperature and 60% RH were kept in carbonation chamber in test period. After test in carbonation chamber samples were investigated with two test methods - a basic pH indicator and the Fourier Transformation Infrared Spectroscopy (FITR) test. A compare of result from different test method in three test period are discussed in paper.