No fines concrete is a type of concrete used in early forms of tower blocks and blocks of flats. It is obtained by eliminating the fine material sand, from the normal concrete mix. The single sized coarse aggregates are surrounded and held together by a thin layer of cement paste giving strength of concrete.
The advantages of this type of concrete are lower density, lower cost due to lower cement content, lower thermal conductivity, relatively low drying shrinkage, no segregation and capillary movement of water, better insulating characteristics than conventional concrete because of the presence of large voids.