WO2019075870A1 - 一种再生块体混凝土预制叠合板及其制作工艺 - Google Patents

一种再生块体混凝土预制叠合板及其制作工艺 Download PDF

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Publication number
WO2019075870A1
WO2019075870A1 PCT/CN2017/114150 CN2017114150W WO2019075870A1 WO 2019075870 A1 WO2019075870 A1 WO 2019075870A1 CN 2017114150 W CN2017114150 W CN 2017114150W WO 2019075870 A1 WO2019075870 A1 WO 2019075870A1
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Prior art keywords
concrete
block
waste
height
new
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PCT/CN2017/114150
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English (en)
French (fr)
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吴波
简思敏
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华南理工大学
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Priority to US16/472,213 priority Critical patent/US10934710B2/en
Publication of WO2019075870A1 publication Critical patent/WO2019075870A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • 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
    • E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
    • B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/10—Producing shaped prefabricated articles from the material by vibrating or jolting and applying pressure otherwise than by the use of presses
    • 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
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0007—Machines or methods for applying the material to surfaces to form a permanent layer thereon for producing articles with exposed aggregate
    • 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
    • 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
    • B28B23/022—Means for inserting reinforcing members into the mould or for supporting them in the mould
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
    • E04C2/52—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits
    • E04C2/526—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits with adaptations not otherwise provided for, for connecting, transport; for making impervious or hermetic, e.g. sealings

Definitions

  • the invention relates to the technical field of waste concrete recycling, in particular to a precast composite panel of recycled concrete and a manufacturing process thereof.
  • the waste concrete block is allowed to protrude from the new concrete surface, and the use of the protruding waste concrete block to increase the roughness of the surface of the prefabricated laminate is an effective way to solve the problem.
  • the prior art has the problem that it cannot be recycled in the concrete prefabricated laminate due to the large size of the waste concrete block.
  • the object of the present invention is to overcome the deficiencies of the prior art.
  • the waste concrete block is allowed to protrude from the new concrete surface to a certain height, and the height is limited by the combined mold, so that the protruding waste concrete block does not affect the site construction.
  • the tying of the sheet steel reinforcement thereby solving the problem that the waste concrete block can not be recycled in the concrete prefabricated laminate; on the other hand, the protruding waste concrete block can significantly increase the roughness of the surface of the prefabricated laminate, thereby Improve prefabricated stack
  • Another object of the present invention is to provide a process for fabricating a regenerated bulk concrete prefabricated laminate.
  • the object of the invention is achieved at least by one of the following technical solutions.
  • a precast composite concrete prefabricated composite board comprising: a new concrete, a waste concrete block and a bottom steel mesh, the waste concrete block and the new concrete are mixed and poured, and between the waste concrete blocks after the pouring is completed
  • the gap is filled with new concrete, and the ratio of the horizontal projected area of the waste concrete block protruding from the new concrete surface to the new concrete surface area is not less than 1:3, the protruding height is no more than 25 mm
  • the protruding height is limited by a combination mold; the combined mold comprises a casting mold and a height-limiting cover plate, and the side mold of the casting mold is reserved with a reinforcing steel positioning port, and the screw and the limit screw are used at the four corners of the casting mold
  • the cap and spacers of different thickness position the vertical position of the height limit cover.
  • waste concrete block is a block formed by crushing waste concrete after the old building, road, bridge or dam is removed and the protective layer and all or part of the steel bar are removed.
  • the new concrete has a compressive strength of not less than 25 MPa.
  • Natural aggregate concrete or recycled aggregate concrete the thickness of new concrete after pouring is not less than 60 mm.
  • the characteristic size of the waste concrete block is 60-100 mm, and the mass ratio of the waste concrete block to the new concrete is 1:3 ⁇ 1:1.
  • the bottom reinforcing steel mesh is formed by the two-way reinforcing steel bars which are perpendicular to each other, and the length of the two-way reinforcing steel extending the edge of the plate should meet the requirements of the overlapping anchoring.
  • a manufacturing process of the precast composite panel of the regenerated block body comprises the following steps:
  • the vibrating table is used to fully vibrate the regenerated bulk concrete prefabricated laminate, followed by steam curing.
  • the present invention has the following advantages and effects:
  • the waste concrete block protruding from the new concrete surface can significantly increase the roughness of the surface of the prefabricated laminated board, and the integrity of the prefabricated laminated board and the post-cast concrete layer can be ensured without the need of the sweeping process in the conventional precast concrete board manufacturing process.
  • Figure 1 is a schematic view of a precast composite panel and a combined mold of recycled bulk concrete.
  • Figure 2 is a schematic view of a precast composite panel of recycled bulk concrete.
  • the figure shows: 1- new concrete; 2- waste concrete block; 3- bottom steel mesh; 4-casting mold; 5- Height limit cover; 6- side mold; 7- screw; 8- limit nut; 9- washer.
  • a precast composite panel of recycled concrete including new concrete 1 and waste concrete block 2
  • the bottom of the steel mesh 3 the waste concrete block and the new concrete mixed pouring, after the pouring is completed, the gap between the waste concrete blocks is filled with new concrete, and the waste concrete block
  • the ratio of the horizontal projected area of the new concrete surface to the new concrete surface area is not less than 1:3, and the protruding height is not more than 25 mm.
  • the protruding height is limited by a combination mold; the combined mold comprises a casting mold 4 and a height-limiting cover 5, and the side mold 6 of the casting mold is provided with a reinforcing bar positioning port, and the screw is used at the four corners of the casting mold. , Limit nut 8 and spacers of different thickness 9 Position the vertical position of the height limit cover.
  • the width of the precast composite panel of the recycled block body is 1200 mm, the span is 3300 mm, and the thickness of the new concrete 1 is 100 mm, waste concrete block 2 feature size 60 mm ⁇ 100 mm.
  • the bottom steel mesh 3 is bundled by reinforcing bars along the span direction and along the width direction, and is reinforced along the span direction C 10@200
  • the length of the two ends extending from the edge of the plate is 150 mm; the reinforcement is C 8@200 along the width direction, and the length of the two ends extending from the edge of the plate is 180 mm.
  • the height of the side mold 6 of the casting mold 4 is 100 mm, and the spacing of the reserved reinforcing bars is 200 mm. ;
  • the height-limiting cover 5 has a clear spacing of 25 mm between the bottom surface and the top surface of the side mold 6 after positioning.
  • the manufacturing process of the above-mentioned recycled block concrete prefabricated composite board comprises the following steps:
  • the vibrating table is used to fully vibrate the regenerated bulk concrete prefabricated laminate, followed by steam curing.

Abstract

一种再生块体混凝土预制叠合板，包括新混凝土(1)、废旧混凝土块体(2)和板底钢筋网(3)，废旧混凝土块体(2)可凸出新混凝土(1)表面，凸出高度不大于25mm，该凸出高度通过组合模具限制，组合模具包括浇筑模具(4)和限高盖板(5)，浇筑模具(4)的侧模(6)预留有钢筋定位口，在浇筑模具(4)的四个角部利用螺杆(7)、限位螺帽(8)和不同厚度的垫片(9)对限高盖板(5)的竖向位置进行定位。同时提供一种再生块体混凝土预制叠合板的制作工艺。该混凝土预制叠合板解决了废旧混凝土块体因尺寸较大无法在预制叠合板中使用的问题，凸出的废旧混凝土块体能增加预制叠合板表面的粗糙度，提高与后浇混凝土的整体性。

Description

一种再生块体混凝土预制叠合板及其制作工艺
技术领域
本发明涉及废旧混凝土循环利用技术领域，具体是一种再生块体混凝土预制叠合板及其制作工艺。
背景技术
建筑工业化是当代建筑技术的发展趋势之一，装配式混凝土结构与现浇混凝土结构相比，具有工厂化生产、现场湿作业少、施工速度快、节约能源等优点。混凝土预制叠合板作为一种具有优秀整体性的装配整体式构件，在装配式建筑中已得到广泛的应用。与此同时，由于天然砂石的开采破坏环境且储量日渐减少，废旧混凝土作为一种宝贵的'特殊资源'，其循环再生利用已引起国内外广泛关注。与再生骨料相比，采用尺度更大的废旧混凝土块体能大大简化废旧混凝土的循环利用过程，同时废旧混凝土块体作为混凝土而非骨料使用，还能显著降低水泥用量，环保效益更为明显。但由于废旧混凝土块体尺寸较大，在传统的混凝土预制叠合板中无法使用，这一问题亟待解决。而本发明中的允许废旧混凝土块体凸出新混凝土表面，同时利用凸出的废旧混凝土块体增加预制叠合板表面的粗糙度，不失为解决该问题的一条有效途径。
综上所述，现有技术存在因废旧混凝土块体尺寸较大而无法在混凝土预制叠合板中循环利用的问题。
发明内容
本发明的目的在于克服现有技术的不足，一方面允许废旧混凝土块体凸出新混凝土表面一定高度，并利用组合模具对该高度予以限制，使凸出的废旧混凝土块体不影响现场施工时板面钢筋的绑扎，从而解决由于废旧混凝土块体尺寸较大无法在混凝土预制叠合板中循环利用的问题；另一方面，凸出的废旧混凝土块体能显著增加预制叠合板表面的粗糙程度，从而提高预制叠
合板与后浇混凝土层的整体性。
本发明的另一个目的在于提供一种再生块体混凝土预制叠合板的制作工艺。
本发明的目的至少通过如下技术方案之一实现。
一种再生块体混凝土预制叠合板，其特征在于：包括新混凝土、废旧混凝土块体和板底钢筋网，所述废旧混凝土块体与新混凝土混合浇筑，浇筑完成后废旧混凝土块体之间的空隙由新混凝土填充，且废旧混凝土块体凸出新混凝土表面部分的水平投影面积与新混凝土表面面积之比不小于 1:3 ，凸出高度不大于 25 mm ，该凸出高度通过组合模具予以限制；所述组合模具包括浇筑模具和限高盖板，浇筑模具的侧模预留有钢筋定位口，在浇筑模具的四个角部利用螺杆、限位螺帽和不同厚度的垫片对限高盖板的竖向位置进行定位。
进一步地，所述的废旧混凝土块体为旧有建筑物、道路、桥梁或堤坝拆除并去除保护层和全部或部分钢筋之后的废旧混凝土经破碎后形成的块状物。
进一步地，所述的新混凝土为抗压强度不小于 25 MPa 的天然骨料混凝土或再生骨料混凝土，浇筑完成后新混凝土的厚度不小于 60 mm 。
进一步地，所述的废旧混凝土块体的特征尺寸为 60~100 mm ，且废旧混凝土块体与新混凝土的质量比为 1:3~1:1 。
进一步地，所述的板底钢筋网由互相垂直的双向钢筋绑扎而成，双向钢筋伸出板边的长度应满足搭接锚固要求。
一种如所述再生块体混凝土预制叠合板的制作工艺，包括以下步骤：
（ 1 ）通过浇筑模具的侧模上预留的钢筋定位口插入钢筋，并绑扎形成板底钢筋网；
（ 2 ）将提前充分湿润的废旧混凝土块体投入浇筑模具的侧模所围成的空
腔内，并拨动块体使其在该空腔内均匀分布；
（ 3 ）向浇筑模具的侧模所围成的空腔内浇入足量新混凝土，然后从上往
下将限高盖板穿过螺杆搁放在垫片上，并拧紧限位螺帽，以避免振捣过程中废旧混凝土块体凸出新混凝土表面的高度超过限值；
（ 4 ）利用振动台对再生块体混凝土预制叠合板进行充分振捣，随后进行蒸汽养护。
本发明相对现有技术，具有如下优点及效果：
（ 1 ） 允许废旧混凝土块体凸出新混凝土表面一定高度，并利用组合模具对该高度予以限制，使凸出的废旧混凝土块体不影响现场施工时板面钢筋的绑扎，从而解决由于废旧混凝土块体尺寸较大无法在混凝土预制叠合板中使用的问题 。
（ 2 ） 新混凝土表面凸出的废旧混凝土块体，能显著增加预制叠合板表面的粗糙程度，无需常规预制混凝土板制作过程中的扫毛工序，即可确保预制叠合板与后浇混凝土层的整体性。
附图说明
图 1 是一种再生块体混凝土预制叠合板与组合模具的示意图。
图 2 是一种再生块体混凝土预制叠合板的示意图。
图中所示为： 1- 新混凝土； 2- 废旧混凝土块体； 3- 板底钢筋网； 4- 浇筑模具； 5- 限高盖板； 6- 侧模； 7- 螺杆； 8- 限位螺帽； 9- 垫片。
具体实 施方式
下面结合实施例及附图对本发明作进一步详细的描述，但本发明的实施方式不限 于此，需指出的是，以下若有未特别详细说明的过程，均是本领域技术人员可参照现有技术实现的。
如图 1 、图 2 所示，一种 再生块体混凝土预制叠合板，包括新混凝土 1 、废旧混凝土块体 2 和板底钢筋网 3 ，所述废旧混凝土块体与新混凝土混合浇筑，浇筑完成后废旧混凝土块体之间的空隙由新混凝土填充，且废旧混凝土块体
凸出新混凝土表面部分的水平投影面积与新混凝土表面面积之比不小于 1:3 ，凸出高度不大于 25 mm ，该凸出高度通过组合模具予以限制；该组合模具包括浇筑模具 4 和限高盖板 5 ，浇筑模具的侧模 6 预留有钢筋定位口，在浇筑模具的四个角部利用螺杆 7 、限位螺帽 8 和不同厚度的垫片 9 对限高盖板的竖向位置进行定位。
本实施例中，再生块体混凝土预制叠合板的宽度 1200 mm ，跨度 3300 mm ，新混凝土 1 厚度 100 mm ，废旧混凝土块体 2 特征尺寸 60 mm~100 mm 。
本实施例中，板底钢筋网 3 由沿跨度方向和沿宽度方向的钢筋绑扎而成，沿跨度方向配筋 C 10@200 ，两端伸出板边的长度 150 mm ； 沿宽度方向配筋 C 8@200 ，两端伸出板边的长度 180 mm 。
本实施例中，所采用浇筑模具 4 的侧模 6 的高度 100 mm ，预留的钢筋定位口的间距 200 mm ；限高盖板 5 定位后其底面与侧模 6 的顶面之间的净间距 25 mm 。
上述的一种再生块体混凝土预制叠合板的制作工艺，包括以下步骤：
（ 1 ）通过浇筑模具 4 的侧模 6 上预留的钢筋定位口插入钢筋，并绑扎形成板底钢筋网 3 ；
（ 2 ）将提前充分湿润的废旧混凝土块体 2 投入浇筑模具 4 的侧模 6 所围成的空腔内，并拨动废旧混凝土块体 2 使其在该空腔内均匀分布；
（ 3 ）向浇筑模具 4 的侧模 6 所围成的空腔内浇入足量新混凝土 1 ，然后从上往下将限高盖板 5 穿过螺杆 7 搁放在垫片 9 上，并拧紧限位螺帽 8 ，以避免振捣过程中废旧混凝土块体 2 凸出新混凝土 1 表面的高度超过限值；
（ 4 ）利用振动台对再生块体混凝土预制叠合板进行充分振捣，随后进行蒸汽养护。
根据本发明的方法，还可以开发一系列的实施例，并非对本发明作任何
形式上的限制，故其他任何未背离本发明的精神实质与原理下所做的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。

Claims (6)

  1. 一种再生块体混凝土预制叠合板，其特征在于：包括新混凝土 (1) 、废旧混凝土块体 (2) 和板底钢筋网 (3) ，所述废旧混凝土块体 (2) 与新混凝土 (1) 混合浇筑，浇筑完成后废旧混凝土块体 (2) 之间的空隙由新混凝土 (1) 填充，且废旧混凝土块体 (2) 凸出新混凝土 (1) 表面部分的水平投影面积与新混凝土 (1) 表面面积之比不小于 1:3 ，凸出高度不大于 25 mm ，该凸出高度通过组合模具予以限制；所述组合模具包括浇筑模具 (4) 和限高盖板 (5) ，浇筑模具 (4) 的侧模 (6) 预留有钢筋定位口，在浇筑模具 (4) 的四个角部利用螺杆 (7) 、限位螺帽 (8) 和不同厚度的垫片 (9) 对限高盖板 (5) 的竖向位置进行定位。
  2. 根据权利要求 1 所述的一种再生块体混凝土预制叠合板，其特征在于：所述废旧混凝土块体为旧有建筑物、道路、桥梁或堤坝拆除并去除保护层和全部或部分钢筋之后的废旧混凝土经破碎后形成的块状物。
  3. 根据权利要求 1 所述的一种再生块体混凝土预制叠合板，其特征在于：所述新混凝土为抗压强度不小于 25 MPa 的天然骨料混凝土或再生骨料混凝土，浇筑完成后新混凝土的厚度不小于 60 mm 。
  4. 根据权利要求 1 所述的一种再生块体混凝土预制叠合板，其特征在于：所述废旧混凝土块体的特征尺寸为 60~100 mm ，且废旧混凝土块体与新混凝土的质量比为 1:3~1:1 。
  5. 根据权利要求 1 所述的一种再生块体混凝土预制叠合板，其特征在于：所述板底钢筋网由互相垂直的双向钢筋绑扎而成，双向钢筋伸出板边的长度应满足搭接锚固要求。
  6. 根据权利要求 1 所述的一种再生块体混凝土预制叠合板的制作工艺，其特征在于：包括以下步骤：
    （ 1 ）通过浇筑模具的侧模上预留的钢筋定位口插入钢筋，并绑扎形成板底钢筋网；
    （ 2 ）将提前充分湿润的废旧混凝土块体投入浇筑模具的侧模所围成的空
    腔内，并拨动废旧混凝土块体使其在该空腔内均匀分布；
    （ 3 ）向浇筑模具的侧模所围成的空腔内浇入足量新混凝土，然后从上往下将限高盖板穿过螺杆搁放在垫片上，并拧紧限位螺帽，以避免振捣过程中废旧混凝土块体凸出新混凝土表面的高度超过限值；
    （ 4 ）利用振动台对再生块体混凝土预制叠合板进行充分振捣，随后进行蒸汽养护。
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