Natural carbonation of self-compacting concretes

Carbonation and electrical resistance of self compacting concrete made with recycled concrete aggregates and metakaolin

“…Since the compressive strength values increases with the addition of MK in SCC mixes, hence an analogous value of correlation is observed in both type of mixes. These results are in agreement with the previous investigations [24,35,70].…”

“…For instance, the reduction in carbonation coefficients have been found to be 5.5% more in case of SCC than in NVC at same water to cement ratio (w/c) [19,34,35]. Based on the earlier studies, the presence of higher contents of calcium hydrates (CH) and calcium silicate hydrates (CSH) compounds with better microstructural properties are responsible for lowering the carbonation depths in SCC in comparison to NVC [36][37][38].…”

Durability performance of sustainable self compacting concretes in precast products due to heat curing

“…However, in most of these studies the filler content was quite higher than the one used in this work and this even generated higher sorptivity coefficients, which also agrees with other authors [22]. Moreover, the finer the microstructure is, the lower the carbonation rate is [33]. In the present paper the F samples showed a finer microstructure than the H ones.…”

“…Initially, a higher carbonation front in the F concrete was expected, due to its lower cement content and, as a consequence, its lower portlandite content that will induce a higher diffusion rate [30]. In fact, some studies observed that the higher the filler content is, the higher the carbonation depth is [31][32][33]. However, in most of these studies the filler content was quite higher than the one used in this work and this even generated higher sorptivity coefficients, which also agrees with other authors [22].…”

Effect of Iron Powder on Inhibition of Carbonation Process in Cementitious Materials

“…6) For method (3), however, its effect can be semipermanent if the harmful chemical factors originate from external sources. Since one of the biggest factors in the carbonation process is the permeability of concrete and, thus, its porous structure, 7,8) the pore blockers can be a first line of defence without changing the chemical properties of the concrete. However, little information has been provided in the literature on this methodology, and there have been only a few reports of significant successes.…”