CN107882240A - 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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CN107882240A
CN107882240A CN201710975373.4A CN201710975373A CN107882240A CN 107882240 A CN107882240 A CN 107882240A CN 201710975373 A CN201710975373 A CN 201710975373A CN 107882240 A CN107882240 A CN 107882240A
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CN107882240B (zh
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吴波
简思敏
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South China University of Technology SCUT
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26Building 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
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/08Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/087Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
    • B28B1/0873Producing 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00Producing shaped prefabricated articles from the material
    • B28B1/08Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/10Producing shaped prefabricated articles from the material by vibrating or jolting and applying pressure otherwise than by the use of presses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/0007Machines or methods for applying the material to surfaces to form a permanent layer thereon for producing articles with exposed aggregate
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02Arrangements 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02Arrangements 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
    • B28B23/022Means for inserting reinforcing members into the mould or for supporting them in the mould
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/44Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
    • E04C2/52Building 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
    • E04C2/526Building 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

Abstract

本发明公开了一种再生块体混凝土预制叠合板及其制作工艺,该预制叠合板由新混凝土、废旧混凝土块体和板底钢筋网组成。所述废旧混凝土块体可凸出新混凝土表面,但凸出高度不大于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,并在四个角部利用螺杆、限位螺帽和不同厚度的垫片对限高盖板进行定位。本发明一方面允许废旧混凝土块体凸出新混凝土表面,并利用组合模具对凸出高度予以限制,使其不影响现场施工时板面钢筋的绑扎,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;另一方面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C10@200,两端伸出板边的长度150 mm;沿宽度方向配筋C8@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。
CN201710975373.4A 2017-10-16 2017-10-16 一种再生块体混凝土预制叠合板及其制作工艺 Active CN107882240B (zh)

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