GB672725A - Improvements relating to the manufacture of pre-stressed concrete - Google Patents
Improvements relating to the manufacture of pre-stressed concreteInfo
- Publication number
- GB672725A GB672725A GB2000649A GB2000649A GB672725A GB 672725 A GB672725 A GB 672725A GB 2000649 A GB2000649 A GB 2000649A GB 2000649 A GB2000649 A GB 2000649A GB 672725 A GB672725 A GB 672725A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plates
- mould
- concrete
- rod
- wires
- 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
- 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
- B28B23/043—Wire anchoring or tensioning means for the reinforcements
Abstract
672,725. Prestressed reinforced concrete. NATIONAL RESEARCH DEVELOPMENT CORPORATION. July 31, 1950 [July 29, 1949], No. 20006/49. Class 20(iv) In the production of prestressed reinforced concrete the wire reinforcement 9 is gripped by wedges 10 fitting in coacting holes 8 in anchor plates 6, 7, the anchor plates are arranged between the end walls 2, 3 of the mould 1, and tension is applied to the plates by means of bars or the like 4, 5, detachably secured to the plates and extending through the end walls. of the mould, the anchor plates being cast permanently in the concrete. The wires are preferably cut so that they extend beyond plates 6, 7, but fall short of the ends of the mould so that end corrosion is prevented, but the wires act as normal reinforcement at the ends. The wires are preferably overtensioned by about 5 per cent before being placed in the mould to lessen the liability to creep. As shown, the rods 4 and 5 screw into plates 6 and 7 but may be otherwise attached, and rod 5 is anchored by a nut 11 at the end wall 3 while rod 4 is secured to a cross-bar 13 of a hydraulic ram system 14 which is anchored to a yoke 16 engaging the end wall 2. When the desired tension has been applied the rod 4 is secured by screwing up nut 15 so that it contacts wall 2, and the concrete is cast. When the concrete is cured rods 4 and 5 are removed and the holes grouted. Alternatively bars 4 and 5 may be connected between a hydraulic ram system and an anchorage which are fixed relatively to each other, e.g. to the floor, so that the stress is not applied to the mould. Specification 642,360 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2000649A GB672725A (en) | 1949-07-29 | 1949-07-29 | Improvements relating to the manufacture of pre-stressed concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2000649A GB672725A (en) | 1949-07-29 | 1949-07-29 | Improvements relating to the manufacture of pre-stressed concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB672725A true GB672725A (en) | 1952-05-28 |
Family
ID=10138783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2000649A Expired GB672725A (en) | 1949-07-29 | 1949-07-29 | Improvements relating to the manufacture of pre-stressed concrete |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB672725A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106863585A (en) * | 2017-01-20 | 2017-06-20 | 俞晓东 | Tensioning equipment for manufacturing prestressed pile |
| CN113290692A (en) * | 2021-07-02 | 2021-08-24 | 中交一公局第二工程有限公司 | Simple tensioning method for prefabricated part steel bar |
| CN115446972A (en) * | 2022-08-11 | 2022-12-09 | 河海大学 | Concrete axial tension test piece centering die and pouring method |
-
1949
- 1949-07-29 GB GB2000649A patent/GB672725A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106863585A (en) * | 2017-01-20 | 2017-06-20 | 俞晓东 | Tensioning equipment for manufacturing prestressed pile |
| CN113290692A (en) * | 2021-07-02 | 2021-08-24 | 中交一公局第二工程有限公司 | Simple tensioning method for prefabricated part steel bar |
| CN115446972A (en) * | 2022-08-11 | 2022-12-09 | 河海大学 | Concrete axial tension test piece centering die and pouring method |
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