The effect of coarse aggregate gradation on the properties of self-compacting concrete

Effect of particle gradation on properties of fresh and hardened cemented paste backfill

“…Finer particles have higher water absorption capacities than coarser particles [27]. Another important reason for this reduction of transportability is that finer particles increase the amount of friction and the number of collisions that occur between the tailings particles.…”

Towards a realistic morphological model for the meso-scale mechanical and transport behavior of cementitious composites

“…These aggregates may be of different types (siliceous, plastic, calcareous and even ceramic [8]) and having different textures (rough or smooth) [9] as a result having different levels of bonding to the mortar [10], and have an angular and elongated or rounded and compact shape, all of which can have a significant influence on the stress distribution within the concrete material [8,11] and thus contribute to differences in mechanical and transport behavior of the final formed composite. In addition, the aggregate volume fraction and gradation have an effect on the mechanical performance [12,13].…”

The optimization of aggregate blends for sustainable low cement concrete

“…The effect of PSD on workability, density and compressive strength of concrete mixtures is reported in the literature [24,[32][33][34]. Packing criteria for optimizing concrete mixtures are occasionally used for various applications including high-strength concrete, self-consolidating concrete, low cement concrete for pavement applications, and heavyweight concrete [6,12,13,19,35]. The purpose of this paper is to investigate the effect of combined criteria such as grading, the location on coarseness chart, and corresponding experimental packing (loose vs. compacted state), on properties of low cement concrete mixtures.…”

“…To address the aggregate mixture proportions, ACI Education Bulletin E1-07 recently recommended using an intermediate aggregates (IA) fraction to compensate for the missing grain sizes [10], and ACI 211 Technote drafted a document for the use of multiple criteria for aggregates optimization. In spite of several reports discussing the importance of theoretical models representing the packing of natural or artificial aggregate assemblies [11,[38][39][40], the empirical approach remains very important tool to verify the models by testing different aggregate combinations and correlating the packing degree to the strength characteristics of particular composites [32,35,39].…”