Evolution of ITZ and its effect on the carbonation depth of concrete under supercritical CO2 condition
نویسندگان
چکیده
In this paper, supercritical carbonation tests of concrete specimens with different water-to-cement ratios are carried out. the test, thickness interfacial transition zone (ITZ) is determined by distribution Ca/Si ratio across interface between coarse aggregate and cement paste. The microhardness distribution, microstructure porosity ITZ before after analyzed. A geometrical physical model considering porosity, aggregates, ITZ, proposed, which cracks, pores, calcium carbonates, C-S-H gel at aggregates paste can be studied. overall microstructures relatively compacted carbonation. reduced from 47-79 μm to 35–51 average value variance depth increase ITZ. Comparing results thicknesses it appears that has greater impact on concrete.
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ژورنال
عنوان ژورنال: Cement & Concrete Composites
سال: 2022
ISSN: ['0958-9465', '1873-393X']
DOI: https://doi.org/10.1016/j.cemconcomp.2021.104336