CN104594555A - Prefabricated reinforced concrete beam with transverse high-strength concrete separation plate and construction method thereof - Google Patents

Prefabricated reinforced concrete beam with transverse high-strength concrete separation plate and construction method thereof Download PDF

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Publication number
CN104594555A
CN104594555A CN201410736484.6A CN201410736484A CN104594555A CN 104594555 A CN104594555 A CN 104594555A CN 201410736484 A CN201410736484 A CN 201410736484A CN 104594555 A CN104594555 A CN 104594555A
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China
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concrete
prefabricated
strength
strength concrete
shaped
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CN201410736484.6A
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Chinese (zh)
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杨勇
于云龙
郭宇翔
杨洋
马宁
薛亦聪
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西安建筑科技大学
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Priority to CN201410736484.6A priority Critical patent/CN104594555A/en
Publication of CN104594555A publication Critical patent/CN104594555A/en

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Abstract

A prefabricated reinforced concrete beam with a transverse high-strength concrete separation plate employs an idea of casting a part of a prefabricated part in situ, and is composed of a prefabricated part and a cast-in-situ part, and comprises a prefabricated U-shaped high-strength concrete groove, first in-situ common concrete packed into the prefabricated U-shaped high-strength concrete groove, multiple transverse high-strength concrete separation plates which are arranged in the prefabricated U-shaped high-strength concrete groove and are perpendicular to the groove length direction, multiple closed stirrups which are arranged in the prefabricated U-shaped high-strength concrete groove and are perpendicular to the groove length direction, multiple first longitudinal ribs which are arranged in at the bottom of the prefabricated U-shaped high-strength concrete groove and are parallel to the groove length direction, and a cast-in-situ flange plate arranged at the top of the prefabricated U-shaped high-strength concrete groove. The invention also provides a construction method for the beam. According to the technical scheme, the longitudinal anti-shearing effect between the prefabricated concrete and cast-in-situ concrete is improved, and also lateral destroying is prevented, and the crack resistance, durability and fireproof performance of the beam are improved.

Description

A kind of precast and assembled reinforced concrete beam with horizontal high-strength concrete dividing plate and construction method

Technical field

The invention belongs to technical field of buildings, particularly a kind of precast and assembled reinforced concrete beam with horizontal high-strength concrete dividing plate and construction method.

Background technology

In modern reinforced concrete structure, most widely used form of structure is the earliest used to be monolithic reinforced concrete structure, it is formwork the structure of monobloc cast at the scene, there is the advantages such as overall performance is good, rigidity is large, barrier properties is good, adaptive capacity built flexibly to out-of-shape and space also very strong simultaneously.But in use also have a lot of shortcomings, as carried out formwork and construction at the scene, working procedure is various, labo r usage is large, and material usage is many, and the cycle is long, high in cost of production, does not play positive impetus for establishing resource economy type and friendly environment society.

Therefore along with the development of building construction technology, be there is development in prefabricated concrete structure.It is the concrete structure being coagulated native component or parts assembly connection by concrete.The making of building unit can be made not by impact and the restriction in season relative to cast-in-place concrete structure fabricated construction, realize suitability for industrialized production, because component carries out building and maintenance in factory, the quality of component is ensured, and substantially reduce the construction period, accelerating construction progress, has saved a large amount of shuttering supportings, but it also also exists many shortcomings simultaneously, overall performance is poor, impervious poor, unfavorable antidetonation, also has certain deficiency in use and aesthetic.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of precast and assembled reinforced concrete beam with horizontal high-strength concrete dividing plate and construction method, remain cast-in-place and advantage that is prefabricated concrete structure, solve the deficiency of two kinds of structures simultaneously, there is the feature of easy construction, with low cost, function admirable.

To achieve these goals, the technical solution used in the present invention is:

With a precast and assembled reinforced concrete beam for horizontal high-strength concrete dividing plate, comprising:

Prefabricated U-shaped high-strength concrete groove 1;

Be filled in the cast-in-place ordinary concrete 1 in prefabricated U-shaped high-strength concrete groove 1;

Be arranged at some horizontal high-strength concrete dividing plate 7 in prefabricated U-shaped high-strength concrete groove 1 and vertical with flute length direction;

Be arranged at some closed stirrup 5 in prefabricated U-shaped high-strength concrete groove 1 and vertical with flute length direction;

Be arranged at prefabricated U-shaped high-strength concrete groove 1 bottom land and the some vertical muscle one 6 parallel with flute length direction;

And,

Be arranged at the cast-in-place frange plate at prefabricated U-shaped high-strength concrete groove 1 top.

The bottom of described stirrup 5 is arranged in cell wall and the bottom land of prefabricated U-shaped high-strength concrete groove 1, vertical muscle 1 is welded on the bottom of stirrup 5, the vertical muscle 28 that the welded top of stirrup 5 is parallel with vertical muscle 1, described prefabricated U-shaped high-strength concrete groove 1, stirrup 5, vertical muscle 1, vertical muscle 28 and horizontal high-strength concrete dividing plate 7 are pre-erection.

Described cast-in-place ordinary concrete 1 and cast-in-place frange plate are cast-in-place part.

The groove two ends of described prefabricated U-shaped high-strength concrete groove 1 are respectively arranged with concrete rubber core.

Described cast-in-place ordinary concrete 1 is different from the concrete strength that prefabricated U-shaped high-strength concrete groove 1 and horizontal high-strength concrete dividing plate 7 adopt with the concrete strength that cast-in-place frange plate adopts.

The concrete strength that the concrete strength that described cast-in-place ordinary concrete 1 and cast-in-place frange plate adopt adopts lower than prefabricated U-shaped high-strength concrete groove 1 and horizontal high-strength concrete dividing plate 7.

The concrete that described cast-in-place ordinary concrete 1 and cast-in-place frange plate adopt is ordinary concrete, regeneration concrete, light weight aggregate concrete, rubber concrete, sound absorption concrete or thermal-insulating concrete.

Described cast-in-place frange plate adopts armored concrete slab, composite slab with profiled steel sheeting or precast concrete superimposed sheet.

Described compressed steel gusset-concrete combined board is made up of profiled sheet or precast concrete plank 3 and cast-in-place ordinary concrete 24, and wherein profiled sheet or precast concrete plank 3 are connected with the top of prefabricated U-shaped high-strength concrete groove 1.

The precast and assembled reinforced concrete beam of the horizontal high-strength concrete dividing plate of this band, step is as follows:

1, in factory, vertical muscle 1 is welded on the bottom of stirrup 5, vertical muscle 28 is welded on the top of stirrup 5, is built in prefabricated U-shaped high-strength concrete groove 1 in the bottom of stirrup 5 and high-strength concrete dividing plate 7, completes pre-erection;

2, at the scene, vertical muscle 1 is directly connected with post;

3, in prefabricated U-shaped high-strength concrete groove 1, cast-in-place ordinary concrete 1 is built;

4, above prefabricated U-shaped high-strength concrete groove 1, cast-in-place frange plate is built.

Compared with prior art, the invention has the beneficial effects as follows:

(1) easy construction.

The horizontal high-strength concrete dividing plate of prefabricated band of beam and the high-strength concrete cage of reinforcement part of U-shaped web comprise beam bottom and indulge stirrup and bottom high-strength concrete in muscle, beam, the production that is all prefabricated in the factory of this part completes, in building site by being directly connected with post by the reinforcing bar of pre-erection, more namely concreting floor completes beam construction and installation.Compared with installing with traditional construction, on-the-spot without temporary support under assembling reinforcement, formwork, form removal and erection beam.If floor adopts compressed steel gusset-concrete combined board or laminated floor slab, then in whole floor construction process all without the need to formwork, form removal and temporary support, on-site construction processes, construction material and construction all greatly reduce man-hour.

(2) flexible design.

In beam under positive bending moment effect, in girder span, pre-erection is in tensile region, for improving the construction stage rigidity of PSRC beam, cracking resistance, shear capacity, durability and fire resistance, its pre-erection adopts the U-shaped high-strength concrete of band iris type, and the cast-in-place part being in pressure zone is owing to having upper reinforcement and the effect of concrete frange plate, without the need to adopting high-strength concrete, adopt regular tenacity concrete.Under hogging moment effect, beam-ends is in the pre-erection for adopting high-strength concrete of pressure zone, and because concrete strength is higher, cross section depth of compression zone is less, simultaneously in conjunction with stirrup encryption restraint and high-strength concrete, cross section plastic rotation can better be ensured or be improved a lot.Therefore, in PSRC beam, pre-erection and cast-in-place part can adopt the concrete of different intensity grades, cause design more flexible.Therefore, the present invention has good Social benefit and economic benefit.

3) functional promotion.

As mentioned above, can adopt high-strength concrete at pre-erection in beam, cast-in-place part adopts regular tenacity concrete, and the two strength grade of concrete can be different.Therefore, in practical engineering application, can not limit by concrete strength in beam when floorslab concrete is selected, select all kinds concrete of different qualities, effective lift structure using function demand.Such as, for cast-in-place part concrete and floorslab concrete, be the energy that economizes on resources, can regeneration concrete be adopted; For alleviating superstructure deadweight, light weight aggregate concrete can be adopted; For improving superstructure shock-absorption sound-insulation effect, rubber concrete or sound absorption concrete can be adopted; For improving superstructure heat-insulating property, thermal-insulating concrete can be adopted.

4) cost is reduced.

In traditional construction, ordinary circumstance underbeam concrete is built together with floorslab concrete, and namely beam concrete and floorslab concrete are necessary for same kind and strength grade concrete.Reinforced concrete beam many employings high-strength concrete that span is larger, causes floor to need too to adopt high-strength concrete, thus causes construction cost to increase; Simultaneously owing to adopting high-strength concrete, also can significantly improve the minimum steel ratio limit value of floor, thus floor bar consumption is increased, cause construction cost to strengthen further.And in precast reinforced concrete beam in this paper, only can adopt high-strength concrete in beam prefabricated part, and the cast-in-place part of beam and floorslab concrete all can adopt ordinary concrete, regeneration concrete or light weight aggregate concrete, strength grade of concrete does not need too high, cause the minimum steel ratio limit value of floor bar to reduce, reduce so the amount of reinforcement of whole superstructure adopts during high-strength concrete relatively.

5) construction quality is good.

In the construction of traditional beam, because working procedure is many, difficulty of construction is large, often to occur in web that concrete vibrating is poor, the quality problems such as misplace of rebars in Concrete intensity insufficient and beam, and construction quality is wayward.And in precast reinforced concrete beam in this paper, the web part of beam is prefabrication, concreting is vibrated convenient and can be adopted stream curing, concrete construction quality is easy to control, the concrete lateral partitions adopted in U-type groove can prevent the longitudinal shear slippage between new-old concrete effectively, especially, time for employing high-strength concrete, in quality control on construction, advantage is more obvious.

To sum up, band proposed by the invention horizontal high-strength concrete dividing plate way can effectively improve on the whole new-old concrete stressed after longitudinal bond damage problem, and greatly improve component deformability in transport with hoisting process simultaneously, realize precast reinforced concrete structure stress performance and functional performance improves enhancing comprehensively, form a kind of new and effective precast and assembled reinforced concrete beam technology.Precast reinforced concrete beam technology proposed by the invention has many remarkable performance advantages such as easy construction, applicability is wide, overall performance is high, can the various reinforced concrete works structure such as extensive use building, factory building, bridge, there is wide application prospect, there are important practical engineering value and economic results in society.

Accompanying drawing explanation

Fig. 1 is precast and assembled reinforced concrete beam section schematic diagram of the present invention.

Fig. 2 is the schematic perspective view of pre-erection of the present invention.

Fig. 3 is the lateral view of pre-erection of the present invention.

Fig. 4 is the top view of pre-erection of the present invention.

Fig. 5 is A-A direction view in Fig. 4, i.e. prefabricated U-shaped high-strength concrete slot cross-section figure.

Fig. 6 is B-B direction view in Fig. 4, i.e. the sectional view of horizontal high-strength concrete dividing plate in prefabricated U-shaped high-strength concrete groove.

Fig. 7 is the schematic perspective view of the cast-in-place part of the present invention.

Fig. 8 is the top view of pre-erection of the present invention.

Fig. 9 is C-C direction view in Fig. 4, i.e. prefabricated U-shaped high-strength concrete slot cross-section figure.

Figure 10 is D-D direction view in Fig. 4, i.e. the sectional view of horizontal high-strength concrete dividing plate in prefabricated U-shaped high-strength concrete groove.

Detailed description of the invention

Embodiments of the present invention are described in detail below in conjunction with drawings and Examples.

A kind of precast and assembled reinforced concrete beam with horizontal high-strength concrete dividing plate of the present invention, adopts the thought that partial precast assembled portion is cast-in-place, is made up of, as shown in Figures 1 to 10, comprises: prefabricated U-shaped high-strength concrete groove 1 pre-erection and cast-in-place part; Be filled in the cast-in-place ordinary concrete 1 in prefabricated U-shaped high-strength concrete groove 1; Be arranged at some horizontal high-strength concrete dividing plate 7 in prefabricated U-shaped high-strength concrete groove 1 and vertical with flute length direction; Be arranged at some closed stirrup 5 in prefabricated U-shaped high-strength concrete groove 1 and vertical with flute length direction; Be arranged at prefabricated U-shaped high-strength concrete groove 1 bottom land and the some vertical muscle one 6 parallel with flute length direction; And be arranged at the cast-in-place frange plate at prefabricated U-shaped high-strength concrete groove 1 top.

Wherein, as shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the bottom of stirrup 5 is arranged in cell wall and the bottom land of prefabricated U-shaped high-strength concrete groove 1, the top of stirrup 5 is unsettled, vertical muscle 1 is welded on the bottom of stirrup 5, the vertical muscle 28 that the welded top of stirrup 5 is parallel with vertical muscle 1, prefabricated U-shaped high-strength concrete groove 1, stirrup 5, vertical muscle 1, vertical muscle 28 and horizontal high-strength concrete dividing plate 7 form pre-erection.As shown in Fig. 7, Fig. 8, Fig. 9 and Figure 10, cast-in-place ordinary concrete 1 and cast-in-place frange plate form cast-in-place part.Cast-in-place frange plate can adopt composite slab with profiled steel sheeting or laminated floor slab.With composite slab with profiled steel sheeting in the present embodiment, be made up of profiled sheet or precast concrete plank 3 and cast-in-place ordinary concrete 24, wherein profiled sheet or precast concrete plank 3 are connected with the top of prefabricated U-shaped high-strength concrete groove 1.After cast-in-place, top and the vertical muscle 28 of stirrup 5 are all arranged in cast-in-place part.

Wherein:

1) concrete involved by pre-erection adopts high-strength concrete, can improve the cracking resistance of precast and assembled reinforced concrete beam, endurance quality and fire resistance.

2) setting of horizontal high-strength concrete dividing plate, can improve the longitudinal cementation between prefabricated and cast-in-situ concrete.

3) concrete rubber core is respectively arranged with at the groove two ends of prefabricated U-shaped high-strength concrete groove 1, for convenience detach, can reuse, thus be convenient to prefabricated high-strength concrete cage of reinforcement.

4) each design parameters such as intensity, thickness, width, spacing involved by the horizontal high-strength concrete dividing plate of the present invention can be optimized design according to corresponding design and calculation method.

Concrete construction method is:

First be prefabricated in the factory the web part, bottom of beam, then in the web part, bottom of building-site mounting rail, finally whole top frange plate part of watering beam together with concrete floor.Stirrup in beam prefabricated part exposes, and the prefabricated web part, bottom of beam is the high-strength concrete cage of reinforcement of the horizontal high-strength concrete dividing plate of band and U-shaped high-strength concrete groove (i.e. web); The cast-in-place frange plate part in top of beam can be the forms such as armored concrete slab, composite slab with profiled steel sheeting and precast concrete superimposed sheet, and wherein cast-in-situ concrete can be the dissimilar concrete such as ordinary concrete, regeneration concrete, light weight aggregate concrete.By the mutual combination of multi-form prefabricated web part and multi-form cast-in-place frange plate, optimum organization all kinds beam can be become, and each tool performance characteristics and advantage, be suitable for different project situation demand.

The present invention is on conventional u-shaped precast beam basis, pre-erection adopts horizontal high-strength concrete dividing plate to build together with high-strength concrete, effective raising pre-erection globality, the anti-slipping property at new-old concrete interface, significantly reduce pre-erection deadweight, meeting on-site hoisting requirement, is a kind of good method for prefabricating.According to the present invention, method for designing is proposed, can the optimised coagulation soil material of dividing plate, thickness and spacing further, precast concrete inner surface lines, the parameters such as pre-erection concrete strength, cast-in-situ concrete intensity and kind (regeneration concrete, light weight aggregate concrete etc.) are to realize optimal design.

Claims (10)

1. the precast and assembled reinforced concrete beam with horizontal high-strength concrete dividing plate, is characterized in that, comprising:
Prefabricated U-shaped high-strength concrete groove (1);
Be filled in the cast-in-place ordinary concrete one (2) in prefabricated U-shaped high-strength concrete groove (1);
Be arranged at some horizontal high-strength concrete dividing plate (7) in prefabricated U-shaped high-strength concrete groove (1) and vertical with flute length direction;
Be arranged at some closed stirrup (5) in prefabricated U-shaped high-strength concrete groove (1) and vertical with flute length direction;
Be arranged at prefabricated U-shaped high-strength concrete groove (1) bottom land and the some vertical muscle one (6) parallel with flute length direction;
And,
Be arranged at the cast-in-place frange plate at prefabricated U-shaped high-strength concrete groove (1) top.
2. the precast and assembled reinforced concrete beam according to claim 1 with horizontal high-strength concrete dividing plate, it is characterized in that, the bottom of described stirrup (5) is arranged in cell wall and the bottom land of prefabricated U-shaped high-strength concrete groove (1), vertical muscle one (6) is welded on the bottom of stirrup (5), the vertical muscle two (8) that the welded top of stirrup (5) is parallel with vertical muscle one (6), described prefabricated U-shaped high-strength concrete groove (1), stirrup (5), vertical muscle one (6), vertical muscle two (8) and horizontal high-strength concrete dividing plate (7) are pre-erection.
3. the precast and assembled reinforced concrete beam according to claim 1 with horizontal high-strength concrete dividing plate, is characterized in that, described cast-in-place ordinary concrete one (2) and cast-in-place frange plate are cast-in-place part.
4. the precast and assembled reinforced concrete beam according to claim 1 with horizontal high-strength concrete dividing plate, is characterized in that, the groove two ends of described prefabricated U-shaped high-strength concrete groove (1) are respectively arranged with concrete rubber core.
5. the precast and assembled reinforced concrete beam according to claim 1 with horizontal high-strength concrete dividing plate, it is characterized in that, described cast-in-place ordinary concrete one (2) is different from the concrete strength that prefabricated U-shaped high-strength concrete groove (1) and horizontal high-strength concrete dividing plate (7) adopt with the concrete strength that cast-in-place frange plate adopts.
6. the precast and assembled reinforced concrete beam according to claim 1 with horizontal high-strength concrete dividing plate, it is characterized in that, the concrete strength that the concrete strength that described cast-in-place ordinary concrete one (2) and cast-in-place frange plate adopt adopts lower than prefabricated U-shaped high-strength concrete groove (1) and horizontal high-strength concrete dividing plate (7).
7. the precast and assembled reinforced concrete beam according to claim 1 with horizontal high-strength concrete dividing plate, it is characterized in that, the concrete that described cast-in-place ordinary concrete one (2) and cast-in-place frange plate adopt is ordinary concrete, regeneration concrete, light weight aggregate concrete, rubber concrete, sound absorption concrete or thermal-insulating concrete.
8. the precast and assembled reinforced concrete beam according to claim 1 with horizontal high-strength concrete dividing plate, is characterized in that, described cast-in-place frange plate adopts armored concrete slab, composite slab with profiled steel sheeting or precast concrete superimposed sheet.
9. the precast and assembled reinforced concrete beam according to claim 8 with horizontal high-strength concrete dividing plate, it is characterized in that, described composite slab with profiled steel sheeting is made up of profiled sheet or precast concrete plank (3) and cast-in-place ordinary concrete two (4), and wherein profiled sheet or precast concrete plank (3) are connected with the top of prefabricated U-shaped high-strength concrete groove (1).
10. the precast and assembled reinforced concrete beam according to claim 1 with horizontal high-strength concrete dividing plate, it is characterized in that, step is as follows:
1), in factory, the bottom that muscle one (6) is welded on stirrup (5) will be indulged, vertical muscle two (8) is welded on the top of stirrup (5), the bottom of stirrup (5) and high-strength concrete dividing plate (7) are built in prefabricated U-shaped high-strength concrete groove (1), completes pre-erection;
2) muscle one (6), at the scene, will be indulged directly be connected with post;
3), in prefabricated U-shaped high-strength concrete groove (1), cast-in-place ordinary concrete one (2) is built;
4), cast-in-place frange plate is built to prefabricated U-shaped high-strength concrete groove (1) top.
CN201410736484.6A 2014-12-05 2014-12-05 Prefabricated reinforced concrete beam with transverse high-strength concrete separation plate and construction method thereof CN104594555A (en)

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CN105256713A (en) * 2015-11-03 2016-01-20 苏交科集团股份有限公司 Semi-assembly steel-concrete composite beam and construction method thereof
CN105350718A (en) * 2015-11-27 2016-02-24 浙江大学 Reinforcement permanency beam formwork and manufacturing method for concrete structural member with shearing resistance
CN105350717A (en) * 2015-11-27 2016-02-24 浙江大学 Reinforcement pin joint permanency beam formwork, concrete structural member and manufacturing method
CN105369981A (en) * 2015-11-27 2016-03-02 浙江大学 Reinforcement-type permanent beam form with embedded buckle connection, concrete structural element and manufacture method thereof
CN105946099A (en) * 2016-05-19 2016-09-21 吉林省快构建筑科技有限公司 Grouted fabricated concrete beam and construction method thereof
CN105971175A (en) * 2016-05-17 2016-09-28 张宗楼 Hollow laminated floor slab
CN108049572A (en) * 2018-01-25 2018-05-18 万保金 Prefabricated composite beam shell
BE1026230B1 (en) * 2018-04-23 2019-11-25 Deleersnyder Bvba A prefabricated building element of reinforced concrete

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Publication number Priority date Publication date Assignee Title
CN105256713A (en) * 2015-11-03 2016-01-20 苏交科集团股份有限公司 Semi-assembly steel-concrete composite beam and construction method thereof
CN105350718A (en) * 2015-11-27 2016-02-24 浙江大学 Reinforcement permanency beam formwork and manufacturing method for concrete structural member with shearing resistance
CN105350717A (en) * 2015-11-27 2016-02-24 浙江大学 Reinforcement pin joint permanency beam formwork, concrete structural member and manufacturing method
CN105369981A (en) * 2015-11-27 2016-03-02 浙江大学 Reinforcement-type permanent beam form with embedded buckle connection, concrete structural element and manufacture method thereof
CN105369981B (en) * 2015-11-27 2018-03-23 浙江大学 A kind of arrangement of reinforcement formula buckle connection permanent beam template, concrete structure member and manufacture method
CN105971175A (en) * 2016-05-17 2016-09-28 张宗楼 Hollow laminated floor slab
CN105946099A (en) * 2016-05-19 2016-09-21 吉林省快构建筑科技有限公司 Grouted fabricated concrete beam and construction method thereof
CN105946099B (en) * 2016-05-19 2018-08-17 中铁建设集团有限公司 Fill the method for construction of core assembly concrete beam
CN108049572A (en) * 2018-01-25 2018-05-18 万保金 Prefabricated composite beam shell
BE1026230B1 (en) * 2018-04-23 2019-11-25 Deleersnyder Bvba A prefabricated building element of reinforced concrete

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