GB564938A - Improvements in the production of pre-stressed reinforced concrete sleepers - Google Patents
Improvements in the production of pre-stressed reinforced concrete sleepersInfo
- Publication number
- GB564938A GB564938A GB614943A GB614943A GB564938A GB 564938 A GB564938 A GB 564938A GB 614943 A GB614943 A GB 614943A GB 614943 A GB614943 A GB 614943A GB 564938 A GB564938 A GB 564938A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- cover
- concrete
- reinforced concrete
- tubes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
- B28B7/46—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for humidifying or dehumidifying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
564,938. Reinforced concrete sleepers. DOWSETT ENGINEERING CONSTRUCTION, Ltd., and BARBER, R. S. V. April 16, 1943, No. 6149. [Class 20 (iv)] [Also in Group V] A pre-stressed reinforced concrete sleeper, beam, or slab is made in a mould 12 having a fixed end plate 14 to which the reinforcing wires are secured, and a movable end plate 16 carried by a plunger 18 to which the wires are secured by wedges 20. A cover 21 is carried by hydraulic rams 23 and is a sliding fit in the mould. In operation, the mould is filled with concrete and pressure applied by the cover 21. Water escapes through tubes 24 having openings 25 and the outward pressure on the plunger 18 stresses the'wires. When discharge of water ceases, rods 27 are pushed down to free the tubes 24 of concrete, and the tubes are then pushed down until the openings 25 are covered. The walls of the mould and the cover may be formed as a jacket for hot water or steam to expedite the setting of the concrete, and vibration may also be applied to the mould or cover. Specifications 338,864, [Class 20 (iv)], 364,621, 393,576, [both in Group V], 433,059 and 468,706 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB614943A GB564938A (en) | 1943-04-16 | 1943-04-16 | Improvements in the production of pre-stressed reinforced concrete sleepers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB614943A GB564938A (en) | 1943-04-16 | 1943-04-16 | Improvements in the production of pre-stressed reinforced concrete sleepers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB564938A true GB564938A (en) | 1944-10-19 |
Family
ID=9809300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB614943A Expired GB564938A (en) | 1943-04-16 | 1943-04-16 | Improvements in the production of pre-stressed reinforced concrete sleepers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB564938A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0545346A1 (en) * | 1991-12-03 | 1993-06-09 | Technische Universität Dresden | Filter core for dewatering during the pressing of fresh concrete |
FR2781406A1 (en) * | 1998-07-27 | 2000-01-28 | Armines Ass Pour La Rech Et Le | Method for the production of a hardening material, notably cement based, at higher production rates and with improved mechanical characteristics |
WO2003056135A1 (en) * | 2001-12-21 | 2003-07-10 | Gordon Cowan | Support apparatus and apparatus for producing concrete articles |
-
1943
- 1943-04-16 GB GB614943A patent/GB564938A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0545346A1 (en) * | 1991-12-03 | 1993-06-09 | Technische Universität Dresden | Filter core for dewatering during the pressing of fresh concrete |
FR2781406A1 (en) * | 1998-07-27 | 2000-01-28 | Armines Ass Pour La Rech Et Le | Method for the production of a hardening material, notably cement based, at higher production rates and with improved mechanical characteristics |
WO2003056135A1 (en) * | 2001-12-21 | 2003-07-10 | Gordon Cowan | Support apparatus and apparatus for producing concrete articles |
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