Concrete is a composite material composed of coarse aggregate bonded together with a fluid . Often, additives (such as pozzolans or superplasticizers) are included in the mixture to improve the physical .. Aggregate consists of large chunks of material in a concrete mix, generally a coarse gravel or crushed rocks such as.
Concrete (cement) MATERIALS in small-scale art projects and which ones to use. . It can be difficult to handle as it is very fine, and makes the wet mix "sticky". . Note: You cannot use a polymer additive such as latex or acrylic with PVA fibres.