ABSTRACT
The Concrete Society (UK), published a specification for sprayed concrete in 1979, and Guidance Notes on the measurement of sprayed concrete in 1981.
The UK Code for the design of concrete water-retaining structures (BS 8007) only devotes one short clause (6.7) to pneumatically applied mortar and does not offer any detailed advice or information on the use of this material. The Code comments: ‘It is a specialist operation…’ and ‘the designer should agree a full specification with the contractor for materials, mix proportions, mixing, placing, equipment and curing…’ The implication of this statement is that structures constructed of pneumatically applied mortar are outside the scope of the Code. No reference is made in the Code of pneumatically applied concrete, and this is unfortunate as sprayed concrete has been used satisfactorily for many years for swimming pools, both large and small. The material is also used for repair and strengthening reinforced concrete structures and for lining tunnels.
