Characterizations of self-consolidating concrete (SCC) from a physicalmechanical perspective with various additions

Abstract

Self-consolidating concretes (SCC) are special concretes that have the particularity of being very fluid and have been developed over the past thirty years. They are still qualified today as "new concretes" because their use remains modest, although they have strong development potential. The specificity of SCC compared to ordinary vibrated concrete (OC) lies in the fact that it is extremely fluid and does not require vibration to be implemented. Compacting under the effect of their own weight, they can be poured in areas with a high density of reinforcement. For the formulation of self-consolidating concretes, a large volume of mineral addition is necessary so as to reduce the quantity of cement induced by the increase in the volume of paste necessary to allow the flow of the concrete. The main objective of this work was to determine the effect of different cement additions (Filler limestone (Fc), crushed dune sand (Sd), and silica fume (Fs)) by partial substitution of a certain quantity of Portland cement on the physical-mechanical properties of SCC using the capillary absorption test. The results obtained demonstrate that all self-consolidating concretes give interesting results in terms of compressive strength and water absorption.

The role of fibers and mineral admixtures in self-compacting concrete

“…The flow ability of cement paste, a key characteristic of self-consolidating concrete (SCC), is influenced by the water-to-cementation material ratio. An increase in this ratio results in improved flow ability but comes at the expense of reduced viscosity and deformability, which are essential properties for SCC [9][10][11][12][13][14]. The self-consolidating concrete (SCC) possesses the capacity to exhibit both fluidity and deformability without experiencing any form of segregation [14][15][16][17][18].…”

Influence of recycled concrete gravel and sand in self-compacting concrete (SCC)

“…SCC is a fluid, homogeneous, deformable, stable concrete placed by gravity alone: no vibration tools are necessary [8], [9], [10]. The potential use of recycled concrete gravels and sands in normal vibrated concrete is well known and studied in depth by many researchers [11], [12], [13], [14].…”

Pozzolan (poz) effects on self-compacting concrete fresh properties

“…To improve the quality of self-compacting concrete, several methods are used, including adding steel fibers, improving the quality of the gravel used, adding cement additives, and adding improver chemicals [2][3][4][5][6][7][8][9].…”

“…Several researchers, including Rachid et al [2][3][4][5][6][7][8][9], have studied self-compacting concrete in order to find the best results.…”