ABSTRACT
The maximum size of the aggregate in fine-grained concrete (FGC) is limited to 10 mm. A common type of this concrete is sand concrete that does not contain coarse aggregates. From the viewpoint of using siftings of granite or other rocks, FGC is the most promising material since it enables to dispose of more material and to fully realize its advantages. Experimental studies were carried out to investigate the effect of siftings' grain composition and using superplasticizers on the properties of concrete with high mixtures fluidity. The most common way to improve the properties of the aggregate on the basis of stone siftings is enrichment—the laundering of dust and clay particles. The chapter presents a study that aims to develop a composition of complex admixtures based on the polycarboxylate ethers and other types of plasticizers, taking into account the content in cement of active mineral additive (blast granular slag) and water-cement ratio.
