Concrete — Specification
This East African Standard applies to concrete for structures cast in situ, precast structures, and structural precast products for buildings and civil engineering structures. The concrete may be mixed on site, ready-mixed concrete or produced in a plant for precast concrete products. This standard specifies requirements for: the constituent materials of concrete; the properties of fresh and hardened concrete and their verification; the limitations for concrete composition; the specification of concrete; the delivery of fresh concrete; the production control procedures; the conformity criteria and evaluation of conformity. This East African Standard applies to concrete compacted to retain no appreciable amount of entrapped air other than entrained air. This standard applies to normal-weight, heavy-weight and light-weight concrete. Other East African Standards for specific products e.g. precast products or for processes within the field of the scope of this standard may require or permit deviations from this standard. Additional or different requirements may be given in further parts of this standard or in other specific East African Standards, for example: concrete to be used in roads and other trafficked areas; concrete using other materials (e.g. fibres); concrete with an upper aggregate size of 4 mm or less (mortar); special technologies (e.g. sprayed concrete); concrete for disposal of liquids and gaseous waste; concrete for vessels for storage of polluting substances; concrete for massive structures (e.g. dams); dry mixed concrete. This standard does not cover health and safety requirements for the protection of workers during production and delivery of concrete