(19)

(11)

EP 0 090 023 A1

(12)

(43) Date of publication: 05.10.1983 Bulletin 1983/40 (21) Application number: 82903152.0 (22) Date of filing: 08.10.1982

(51) International Patent Classification (IPC):  E04B 1/ 21( . ) (86) International application number: PCT/GB1982/000289 (87) International publication number: WO 1983/001269 (14.04.1983 Gazette 1983/09)

(84) Designated Contracting States: AT BE CH DE FR LI LU NL SE (30) Priority: 09.10.1981 GB 19810030609 (71) Applicant: DOW MAC CONCRETE LIMITED Stamford Lincolnshire PE9 4RL (GB)	(72) Inventor: TAYLOR, Howard Peter John Castle Bytham Lincolnshire (GB) (74) Representative: Corin, Christopher John, et al  Mathisen Macara & Co. The Coach House 6-8 Swakeleys Road Ickenham Uxbridge UB10 8BZ Ickenham Uxbridge UB10 8BZ (GB)