3/6/2014 Water retaining concrete class C35A http://www.concrete.org.uk/fingertips_print.asp?docid=913 1/1 Water retaining concrete class C35A For design purposes, BS 8007, Code of practice for design of concrete structures for retaining aqueous liquids, 1987 generally referred to BS 8110, Structural use of concrete. However BS 8007 specified a 35N/mm 2 concrete with a minimum cement content of 325kg/m 3 (compared with 300kg/m 3 in BS 8110) and a maximum water/cement ratio of 0.50 (compared with 0.55 in BS 8110). This variation in constituent material limitations gave rise to the class grade C35A, where A stood for aqueous. The Code also specified maximum cement contents for reinforced concrete of 400kg/m 3 for ordinary Portland cement or cements containing ggbs, or 450kg/m 3 for cements containing fly ash. For prestressed concrete the quantities could be increased to 500kg/m 3 and 550kg/m 3 respectively. Acknowledgement: The Concrete Society The information contained in this nugget has been provided by The Concrete Society technical staff.
For design purposes, BS 8007, Code of practice for design of
concrete structures for retainingaqueous liquids, 1987 generally
referred to BS 8110, Structural use of concrete. However BS
8007
specified a 35N/mm2 concrete with a minimum cement content of
325kg/m3 (compared with
300kg/m3 in BS 8110) and a maximum water/cement ratio of 0.50
(compared with 0.55 in BS 8110).This variation in constituent
material limitations gave rise to the class grade C35A, where A
stoodfor aqueous. The Code also specified maximum cement contents
for reinforced concrete of
400kg/m3 for ordinary Portland cement or cements containing
ggbs, or 450kg/m3 for cements
containing fly ash. For prestressed concrete the quantities
could be increased to 500kg/m3 and
550kg/m3 respectively.
Acknowledgement: The Concrete Society
The information contained in this nugget has been provided by
The Concrete Society technical staff.
