The role of aggregates in the durability comparative study of carbonated and non-carbonated concrete samples with admixtures

The purpose of this study is to investigate the effect of aggregates on the carbonation of quarry sand-based concrete. The concrete is made of 100% quarry sand 0/6.3, gravel 8/15, and 15/25 from the Arab Contractor quarry in Nomayos, Cameroon, with CEM II B-P 42.5 R from CIMENCAM (Cimenteries du Cameroun). The study employed two admixtures: Sikamen and Sika liquid. Carbonation was performed on concrete samples at several dates until 545 days. Carbonated and non-carbonated concrete samples are compared in terms of durability aspet like Thermo Gravimetric Analysis (TGA) and capillary absorption. The findings of study indicate that the compressive strength is satisfactory. The microstructure becomes firmer and more resistant to hostile treatments. A reduction in water and pore space causes mass loss, which leads to an increase in elastic deformation. Sikament additive gives concrete very high plasticity and prolonged rheology, which improves compactness and durability. Sika water repellent reacts with the cement's lime to generate comparable crystallizations that block the mortar's capillaries, making it hermetic with the position of granules during chemical reactions. Accelerated.