GB2559531A - Semi-finished product for preparing loaded armored-concrete beam - Google Patents
Semi-finished product for preparing loaded armored-concrete beam Download PDFInfo
- Publication number
- GB2559531A GB2559531A GB1809409.4A GB201809409A GB2559531A GB 2559531 A GB2559531 A GB 2559531A GB 201809409 A GB201809409 A GB 201809409A GB 2559531 A GB2559531 A GB 2559531A
- Authority
- GB
- United Kingdom
- Prior art keywords
- concrete
- semi
- finished product
- sectional area
- product according
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/22—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members built-up by elements jointed in line
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/085—Tensile members made of fiber reinforced plastics
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
- E04C5/127—The tensile members being made of fiber reinforced plastics
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/026—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of plastic
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Rod-Shaped Construction Members (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to the field of construction, and specifically to the preparation of load-bearing structures in industrial and civil facilities, and to construction components, including bending structures (cross-beams) such as trusses, beams, consoles, etc. In order to create a semi-finished product for a loaded armored-concrete beam having a high bending stiffness and an increased load-bearing capability via the use of a pre-stressed composite rebar, a semi-finished product contains pre-stressed composite rebar in a concrete casing, wherein the ratio of the product of concrete strength determined by the class of the concrete and the cross-sectional area of the concrete in the area where the reinforcing bars are located to the product of the normative strength of the reinforcing bars and the total cross-sectional area of the reinforcing bars, must exceed two.
Description
(56) Documents Cited:
EP 2107180 A2 RU 000154742 U1 SU 001368403 A1
RU 002490404 C1 SU 001779726 A1 (58) Field of Search:
INT CL E04C
Other: PatSearch (RUPTO internal), USPTO, PAJ, Esp@cenet, DWPI, EAPATIS, PATENTSCOPE (87) International Publication Data:
W02017/151007 Ru 08.09.2017 (71) Applicant(s):
Valeriy Nikolaevich Nikolaev ul. Malaya, 9 der. Trenkasy,
Cheboksarsky rayon 429512,
Chuvashskaya Respublika, Russian Federation (72) Inventor(s):
Valeriy Nikolaevich Nikolaev (74) Agent and/or Address for Service:
LLR Lyon boulevard de Sebastopol, 75001, Paris,
France (including Overseas Departments and Territori es) (54) Title of the Invention: Semi-finished product for preparing loaded armored-concrete beam Abstract Title: Semi-finished product for preparing loaded armored-concrete beam (57) The invention relates to the field of construction, and specifically to the preparation of load-bearing structures in industrial and civil facilities, and to construction components, including bending structures (cross-beams) such as trusses, beams, consoles, etc. In order to create a semi-finished product for a loaded armored-concrete beam having a high bending stiffness and an increased load-bearing capability via the use of a pre-stressed composite rebar, a semi-finished product contains pre-stressed composite rebar in a concrete casing, wherein the ratio of the product of concrete strength determined by the class of the concrete and the cross-sectional area of the concrete in the area where the reinforcing bars are located to the product of the normative strength of the reinforcing bars and the total cross-sectional area of the reinforcing bars, must exceed two.
This international application has entered the national phase early
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Fig. 2
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Fig. 3
Fig. 4
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SEMI-FINISHED PRODUCT FOR MAKING A LOADED REINFORCED-CONCRETE BEAM
Technical field
The invention relates to building and is intended, in particular, for making load-bearing structures of industrial and civilian facilities, construction elements, including bent assemblies (girders) such as trusses, beams, cantilevers, etc.
Description of the prior art
The semi-finished product for making a loaded reinforced-concrete beam is a structure consisting of prestressed composite rod reinforcement in a high10 strength concrete shell.
There are known ferroconcrete girders into which longitudinal rod reinforcement was introduced in order to take the tensile forces [Baykov V.N., Sigalov E.Ye. Ferroconcrete Structures: General Course: Textbook for higher educational establishments. - 5th ed., revised and supplemented. - M.: Stroyizdat,
1991, p.-125- 134 p.
However, the above-mentioned structures with metallic reinforcement are apt to corrosion, have high thermal and electrical conductivities.
In order to eliminate corrosion and decrease the thermal conductivity, some foreign firms (for example, SCHOECK, refer to patent EP 1860246 published on
November 12, 2007) use stainless steel as the metallic reinforcement. However, this substantially raises the price of the structure, and the thermal conductivity decreases insufficiently (the thermal conductivity of the stainless steel reinforcement is 4 times lower than the one of usual steel but 100 times higher than the one of the composite material reinforcement).
A prototype of a compound composite-concrete beam is known (patent RU
2490404 published on August 20, 2013). The beam was light-weight and not apt to corrosion.
The composite reinforcement used in that beam had certain advantages over metallic reinforcement:
- It did not corrode
- It did not conduct heat
- It did not conduct electrical current
- It was 4 times lighter than metallic reinforcement
These properties of the composite reinforcement are especially topical in the spheres where the listed properties are needed: in envelopes of buildings and structures, in traverses of high-voltage lines, etc.
However, the composite reinforcement has a low elastic modulus, that is why the beam does not have a necessary bending stiffness and cannot serve as a load-bearing element in loaded structures, for examples, as a cantilever of a balcony of a multi-storeyed building.
Disclosure of the invention
The technical task solved by the invention consists in creating a semifinished product for a loaded reinforced-concrete beam with a high bending stiffness and enhanced load-bearing capacity by using prestressed composite reinforcement.
The technical task is solved by the fact that the semi-finished product for making a loaded reinforced-concrete beam contains prestressed composite reinforcement in a concrete shell; the concrete’s sectional area in the zone where the reinforcing rods are located and the reinforcing rods’ sectional area correlate as follows:
MxSb where:
Mis the concrete’s strength (MPa) determined by the class of the concrete;
Sb is the concrete’s sectional area (sq.cm);
B is the reinforcing rods’ normative strength (MPa);
Sa is the reinforcing rods’ total sectional area (sq.cm).
Heavy concrete or expanded clay concrete has been used as the concrete. The section of the semi-finished product may be oval, rectangular or T-shaped. In the latter case, the stem of the T-shaped section has a hole. The surface of the semi-finished product may be made ribbed, and the ribbing may be longitudinal, inclined or transversal.
The complexity of using composite reinforcement as a loaded element consists in its low modulus of tensile elasticity in comparison with steel reinforcement: it is approximately 4 times smaller. In order to achieve the same bending value as in the case of steel reinforcement, the sectional area of the composite reinforcement must be 4 times bigger. However, the necessary bending value can also be achieved by prestressing the composite reinforcement, even having decreased its sectional area. When buildings (for example, monolithic facilities) are built, the construction elements are made directly on the building site by pouring concrete over the metallic reinforcement.
However, the reinforcement, including composite one, is prestressed only in factory environment for obtaining the semi-finished product that, according to this invention, is used as reinforcement in order to obtain a loaded concrete beam (for example, a balcony cantilever) by pouring concrete on the building site.
By using the prestressed composite reinforcement and the indicated ratio of the concrete’s sectional area to the reinforcing rods’ sectional area, the claimed invention characterized by the above-listed features makes it possible to manufacture the semi-finished product in the factory environment; the semi4 finished product can further be used for making a loaded reinforced-concrete beam with high bending stiffness and enhanced load-bearing capacity.
Brief description of the drawings
The essence of the technical solution is explained by drawings.
Fig. 1 shows the semi-finished product for a reinforced-concrete beam.
Fig. 2 shows the semi-finished product for an oval section reinforcedconcrete beam.
Fig. 3 shows the semi-finished product for a T-shaped section reinforcedconcrete beam.
Fig. 4 shows the semi-finished product for a reinforced-concrete beam mounted into a support as a traverse.
Fig. 5 shows mounting the semi-finished product according to Fig. 2 into a balcony cantilever.
The invention embodiments
The semi-finished product of a loaded concrete beam is made from solidifying mixture of concrete and filler (a natural one, for example, crushed granite, and an artificial one, for example, lightweight expanded clay aggregate) and is reinforced with prestressed rods made of a composite material (glass20 reinforced plastic, basalt-reinforced plastic, aramid-reinforced plastic, carbon fiber reinforced plastic).
Fig. 1 illustrates the semi-finished product for a concrete beam reinforced with prestressed rods 1 made of a composite material (for example, glassreinforced plastic, basalt-reinforced plastic, aramid-reinforced plastic, carbon fiber reinforced plastic). Both heavy concrete with natural fillers (crushed stone) and light-weight concretes with artificial fillers (for example, expanded clay) may be used. Both concretes are marked with number 2 in the Figures. This semifinished product may be used for making girders.
Use of high grades of concrete is necessary for obtaining a high-quality article. A concrete grade is determined by the quality of the cement mixture. The semi-finished product has a ribbed surface (the ribs are marked with number 3), and the ribs may be inclined, transversal or longitudinal. Such a surface ensures better adhesion to the building concrete.
The semi-finished product illustrated in Fig. 1 may be used instead of metallic reinforcement to make concrete structures that operate in a corrosive environment, may serve as the reinforcement when making ceilings of underground parking, garages, port structures, warehouses for chemical substances, etc.
Fig. 2 illustrates the semi-finished product for an oval section concrete beam reinforced with prestressed composite-material rods 1 arranged in two rows.
In the lower row of the semi-finished product, the diameter of the rods is smaller than the one of the rods in the upper row (for example, the diameters are 10-14 mm and 28-35 mm, respectively). Expanded clay concrete 2 has been used as the concrete. The ribs 3 has been made longitudinal. This semi-finished product may be used when making a balcony cantilever for a house with hollow slabs of the ceiling. The size of the oval conforms to the size of a hole in a hollow slab of the ceiling, which permits jamming the end of the semi-finished product in a hole of the hollow slab of the ceiling.
Fig. 3 illustrates the semi-finished product for a T-shaped section concrete beam made from lightweight expanded clay concrete 2 and reinforced with prestressed rods 1 made of a composite material. In the lower part of the semifinished product, there are holes 4 to place the transversal reinforcement (not shown). This semi-finished product is intended for serving as a balcony cantilever in a monolithic building.
Fig. 2 and Fig. 3 illustrate the semi-finished products for balcony cantilevers. By applying these items, it becomes possible to solve the problem of thermal protection of balcony cantilevers and to decrease the heat losses. This solution is much more energy-efficient than the technical solution with application of metal (stainless steel) as the reinforcement.
Fig. 4 illustrates the semi-finished product for a reinforced-concrete beam mounted into a support 5 as a traverse. The semi-finished product has been poured with concrete within the body of the support (for example, an electricity transmission line).
Fig. 5 illustrates mounting the semi-finished product in conformity with
Fig. 2 into a balcony cantilever. The semi-finished product is situated in a house wall perpendicularly to it; one of its ends has been jammed in a hole of a hollow slab 6 of the floor; its other end is the cantilever that protrudes from the house wall through the thermal insulation layer; a balcony slab 8 has been formed on the cantilever.
The concrete’s sectional area in the zone where the reinforcing rods are located and the reinforcing rods’ sectional area in the aforesaid examples of the semi-finished product embodiments interrelate as follows:
MXSh
where:
Mis the concrete’s strength (MPa) determined by the concrete class;
Sb is the concrete’s sectional area (sq.cm);
B is the reinforcing rods’ normative strength (MPa);
Sa is the reinforcing rods’ total sectional area (sq.cm).
This ratio is determined by the fact that at a lower value, the concrete structure can crush itself if the stress is removed from the reinforcing rods during the formation. If the value increases, the weight of the semi-finished product augments, too, which results in the necessity of using weight-lifting mechanisms.
As it follows from the formula, the enhancement of the concrete mixture grade permits decreasing its sectional area.
Industrial applicability
The semi-finished product for a reinforced-concrete beam can be made in two ways.
Molding is the first way. A mold is taken, composite reinforcement is put 10 into it and prestressed (for example, using anchors under RF useful model patent No. 109172 published on October 10, 2011), the mold is filled with concrete and it is compacted (for example, using a vibrator).
Formation without falsework is the second way. The technological process starts with cleaning the forming track by means of a specialized machine and spraying lubricant onto the track in the form of fine airborne dispersion.
After that, the rods wound around a drum are unwound and laid onto the track by means of a laying machine. After laying the necessary length of the rods, they are stretched with an anchor gripping device.
Ready-made concrete mixture is fed to the accumulating hopper of the 20 forming machine via a concrete-feeding tank. A pulling winch and vibrators are switched on. During the uninterrupted process of forming the track, the concrete mixture is fed to the accumulating hopper in time.
By means of a cart for laying the protective coating, the track with the strip of the formed article is covered with a special coating material and left for the time of the thermal treatment. After the article’s concrete has reached its transfer strength, the coating material is removed; then the semi-finished product for a reinforced-concrete beam is marked into segments of a projected length to be cut off.
The semi-finished product is cut by means of a special machine for transversal cutting equipped with a high-strength cutting disk with a diamond coating.
The conducted tests have shown that the structure is functional and the set technical task is solved: the semi-finished product has been created for a loaded reinforced-concrete beam with a high bending stiffness and enhanced loadbearing capacity by virtue of using the prestressed composite reinforcement.
Claims (8)
1. A semi-finished product for making a loaded reinforced-concrete beam; the semi-finished product contains prestressed composite reinforcement in a concrete shell; the concrete’s sectional area in the zone where the reinforcing rods
5 are situated and the reinforcing rods’ sectional area interrelate as follows:
MX5&
-> 2,
BxSa where:
Mis the concrete’s strength (MPa) determined by the concrete class;
Sb is the concrete’s sectional area (sq.cm);
10 B is the reinforcing rods’ normative strength (MPa);
Sa is the reinforcing rods’ total sectional area (sq.cm).
2. A semi-finished product according to claim 1, characterized in that heavy concrete is used as the concrete.
3. A semi-finished product according to claim 1, characterized in that 15 expanded clay concrete is used as the concrete.
4. A semi-finished product according to claim 1, characterized in that its section may be oval or rectangular.
5. A semi-finished product according to claim 1, characterized in that its section may be T-shaped.
20
6. A semi-finished product according to claim 5, characterized in that the stem of the T-shaped section has a hole.
7. A semi-finished product according to claim 2 or 3, characterized in that the surface of the semi-finished product has been made ribbed.
8. A semi-finished product according to claim 4, characterized in that the surface of the semi-finished product has longitudinal, inclined or transversal ribbing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2016108049A RU2644607C2 (en) | 2016-03-04 | 2016-03-04 | Semi-finished product for manufacturing loaded reinforced concrete beam |
| PCT/RU2016/000792 WO2017151007A1 (en) | 2016-03-04 | 2016-11-17 | Semi-finished product for preparing loaded armored-concrete beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201809409D0 GB201809409D0 (en) | 2018-07-25 |
| GB2559531A true GB2559531A (en) | 2018-08-08 |
Family
ID=59744243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1809409.4A Withdrawn GB2559531A (en) | 2016-03-04 | 2016-11-17 | Semi-finished product for preparing loaded armored-concrete beam |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE112016005118T5 (en) |
| GB (1) | GB2559531A (en) |
| RU (1) | RU2644607C2 (en) |
| WO (1) | WO2017151007A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1368403A1 (en) * | 1986-04-23 | 1988-01-23 | Научно-Производственное Объединение "Дорстройтехника" Министерства Дорожного Строительства Бсср | Ferroconcrete girder |
| SU1779726A1 (en) * | 1991-01-23 | 1992-12-07 | Tsni P Ex I Promy Zdanij | Reinforced-concrete collar beam |
| EP2107180A2 (en) * | 2008-04-04 | 2009-10-07 | Riccardo Valente | Prestressed concrete component, suitable for providing outdoor walkable surfaces and for cladding walls, and associated production method |
| RU2490404C1 (en) * | 2012-01-18 | 2013-08-20 | Валерий Николаевич Николаев | Compound composite-concrete beam and method of its production |
| RU154742U1 (en) * | 2014-05-20 | 2015-09-10 | Владимир Викторович Данель | REINFORCED CONCRETE ELEMENT WITH INCREASED BEARING ABILITY |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006011335A1 (en) | 2006-03-09 | 2007-09-13 | Schöck Bauteile GmbH | Thermal insulation component for use between e.g. ceiling and balcony, has insulating body with foot and reinforcement parts, where reinforcement part is arranged vertically over foot part, and has horizontal length smaller than foot part |
-
2016
- 2016-03-04 RU RU2016108049A patent/RU2644607C2/en active
- 2016-11-17 WO PCT/RU2016/000792 patent/WO2017151007A1/en active Application Filing
- 2016-11-17 GB GB1809409.4A patent/GB2559531A/en not_active Withdrawn
- 2016-11-17 DE DE112016005118.2T patent/DE112016005118T5/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1368403A1 (en) * | 1986-04-23 | 1988-01-23 | Научно-Производственное Объединение "Дорстройтехника" Министерства Дорожного Строительства Бсср | Ferroconcrete girder |
| SU1779726A1 (en) * | 1991-01-23 | 1992-12-07 | Tsni P Ex I Promy Zdanij | Reinforced-concrete collar beam |
| EP2107180A2 (en) * | 2008-04-04 | 2009-10-07 | Riccardo Valente | Prestressed concrete component, suitable for providing outdoor walkable surfaces and for cladding walls, and associated production method |
| RU2490404C1 (en) * | 2012-01-18 | 2013-08-20 | Валерий Николаевич Николаев | Compound composite-concrete beam and method of its production |
| RU154742U1 (en) * | 2014-05-20 | 2015-09-10 | Владимир Викторович Данель | REINFORCED CONCRETE ELEMENT WITH INCREASED BEARING ABILITY |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112016005118T5 (en) | 2018-12-13 |
| RU2016108049A (en) | 2017-09-07 |
| WO2017151007A1 (en) | 2017-09-08 |
| RU2644607C2 (en) | 2018-02-13 |
| GB201809409D0 (en) | 2018-07-25 |
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