EP 0251954 B1 19900613 - METHOD AND DEVICE FOR STRESS RELAXATION AT THE END OF COMPACTING A MIXTURE OF AN AGGREGATE AND A BINDER
Title (en)
METHOD AND DEVICE FOR STRESS RELAXATION AT THE END OF COMPACTING A MIXTURE OF AN AGGREGATE AND A BINDER
Publication
Application
Priority
FR 8610128 A 19860704
Abstract (en)
[origin: US4826419A] The invention relates to a process for relaxing lateral stresses at the end of shaping by compacting of a block constituted by an aggregate and a binder (such as a carbon-containing paste), to which is applied a main monoaxial stress in a rigid mold having a bottom and four side walls. According to the process, at the end of compacting and along the compacting axis, there is maintained a residual stress of between 50 and 2000 kilopascals, and preferably between 100 and 500 kilopascals. At least two of the side walls of the mold are then moved apart by a few millimeters, followed by the elimination of the main stress and the extraction of the molded block. The residual stress is maintained for a period of between 1 and 20 seconds following the moving apart of the walls.
IPC 1-7
IPC 8 full level
B30B 11/02 (2006.01); B30B 15/02 (2006.01)
CPC (source: EP KR US)
B30B 11/02 (2013.01 - KR); B30B 11/027 (2013.01 - EP US); B30B 15/022 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE ES GB GR IT LI NL SE
DOCDB simple family (publication)
EP 0251954 A1 19880107; EP 0251954 B1 19900613; AT E53534 T1 19900615; AU 593662 B2 19900215; AU 7508287 A 19880107; BR 8703382 A 19880315; CA 1312190 C 19930105; CN 1010844 B 19901219; CN 87104583 A 19880120; DE 3763161 D1 19900719; ES 2015596 B3 19900901; FR 2600939 A1 19880108; FR 2600939 B1 19920131; GR 3000577 T3 19910731; IS 1395 B6 19891031; IS 3237 A7 19880105; KR 880001419 A 19880423; NO 170139 B 19920609; NO 170139 C 19920916; NO 872782 D0 19870702; NO 872782 L 19880105; NZ 220915 A 19891221; OA 08628 A 19881130; US 4826419 A 19890502; ZA 874845 B 19880330
DOCDB simple family (application)
EP 87420187 A 19870701; AT 87420187 T 19870701; AU 7508287 A 19870703; BR 8703382 A 19870703; CA 541132 A 19870702; CN 87104583 A 19870703; DE 3763161 T 19870701; ES 87420187 T 19870701; FR 8610128 A 19860704; GR 900400122 T 19900621; IS 3237 A 19870703; KR 870007091 A 19870703; NO 872782 A 19870702; NZ 22091587 A 19870701; OA 59156 A 19870703; US 6587887 A 19870624; ZA 874845 A 19870703