WO2021142990A1 - 一种压印材料及新老混凝土结合面糙化施工方法 - Google Patents

一种压印材料及新老混凝土结合面糙化施工方法 Download PDF

Info

Publication number
WO2021142990A1
WO2021142990A1 PCT/CN2020/090409 CN2020090409W WO2021142990A1 WO 2021142990 A1 WO2021142990 A1 WO 2021142990A1 CN 2020090409 W CN2020090409 W CN 2020090409W WO 2021142990 A1 WO2021142990 A1 WO 2021142990A1
Authority
WO
WIPO (PCT)
Prior art keywords
concrete
new
imprinting material
roughening
embossing material
Prior art date
Application number
PCT/CN2020/090409
Other languages
English (en)
French (fr)
Inventor
王雄
邹力
谢卜均
廖杰
董兵
周辉
陈亮
贾龙
Original Assignee
中铁二局集团有限公司
中铁二局第五工程有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中铁二局集团有限公司, 中铁二局第五工程有限公司 filed Critical 中铁二局集团有限公司
Publication of WO2021142990A1 publication Critical patent/WO2021142990A1/zh

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/43—Machines or arrangements for roughening or patterning freshly-laid paving courses, e.g. indenting rollers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/10—Devices for levelling, e.g. templates or boards

Definitions

  • the invention relates to the field of building construction, in particular to an embossing material and a construction method for roughening the bonding surface of new and old concrete.
  • the construction of large buildings often involves the anchoring between new and old concrete layers due to the construction environment and equipment restrictions, and new concrete is poured on the basis of the old concrete.
  • the bonding surface of new and old concrete is the weak point of the concrete structure.
  • the bonding surface needs to be able to bite and fix well, so the bonding surface needs to be roughened.
  • the roughening treatment methods of the bonding surface mainly include chiseling, napping, milling, shot blasting and water flushing.
  • the chiseling method refers to a construction method in which a combination of iron drill and hammer, pneumatic pick, electric pick or chisel is used to perform star-point chiseling on the concrete surface to make the joint surface appear uneven and rough.
  • "Iron drill + hammer” is manual chiseling.
  • the chiseling method of pneumatic pick and electric pick is pneumatic or electric driving the pick to chisel. Although it is labor-saving, it still needs manual support. All three methods require a lot of labor and low efficiency. , The density of chiseling is affected by the subjective judgment of the operators, and the quality is difficult to control.
  • the chiseling machine uses pneumatic or electric means to make the chiseling head impact the concrete structure at high frequency. Although the density of chiseling is guaranteed, it cannot be used for structures with more embedded steel bars; and because of its large impact force, it is difficult to control and easy to control. Cause damage to the concrete structure. Electric picks, pneumatic picks, and haircutting machines will make a lot of noise during use, and there are restrictions on their use in municipal projects, prefabricated yards and other projects.
  • the roughening method refers to the roughening method that uses a special comb-like tool to scratch the surface of the concrete into stripes before the initial setting of the concrete by electric or manual means. Because the drawing method will loosen the aggregate of the concrete surface layer during the scratching process, it has a great impact on the quality of the concrete structure, and it cannot be used for structures with more embedded steel bars.
  • the milling method refers to the method of using a milling machine to process the concrete joint surface.
  • the principle is to cut the concrete surface through the milling rotor and cutter head.
  • the impact force is large, and the surface aggregate will be loosened and the concrete structure will appear. Damages such as microcracks; at the same time, the equipment is large in size and requires high working space, and it cannot be used on concrete surfaces with pre-embedded steel bars.
  • Shot blasting method refers to the use of shot blasting machine to spray steel shots at high speed to hit the concrete surface, making the concrete surface uneven. During its use, a large amount of dust and loud noise will be generated, serious environmental pollution, and harmful to the health of workers. It cannot be used for concrete surfaces with pre-embedded steel bars.
  • the principle of the water flushing method is to apply a retarder on the surface of the concrete that needs to be roughened to make the setting time difference between the surface concrete and the lower concrete.
  • the surface layer is washed with high pressure water to take away the unsolidified cementing material and fine aggregates.
  • the coarse aggregate is exposed to realize the purpose of roughening the concrete surface.
  • the water flushing method is a roughening method that combines physical and chemical effects.
  • the retarder is greatly affected by external factors such as ambient temperature, concentration, and concrete hydration heat. It is difficult to determine the exact flushing time at the construction site. The ability of the operator is relatively high.
  • the amount of waste water produced by the water flushing method is large, and the waste water contains water reducing agents, gelling materials and fine aggregates, which seriously pollutes the environment and makes pollution-free treatment difficult. Residual retarders will slow the development of the strength of the concrete bonding surface, artificially create a weak surface, which has a great impact on the quality of the project, and engineers and technicians need to use it carefully.
  • the existing multiple roughening methods for concrete bonding surfaces have their own shortcomings, including large labor input, low efficiency, serious environmental pollution, high requirements for working space, easy to cause damage to the concrete structure, and large influence by external factors. It is not applicable to the embedded reinforced concrete surface and other issues.
  • the purpose of the present invention is to provide an embossing material and a construction method for roughening the bonding surface of the new and old concrete in view of the problems in the prior art, so that the bonding surface of the new and old concrete can be well embedded, and the labor input in the construction is small and the construction High efficiency, low environmental pollution, low requirements on the site and concrete surface, no damage to the concrete structure, convenient construction and operation.
  • the invention provides an embossing material used in the construction of roughening the bonding surface of new and old concrete.
  • the embossing material includes a bottom plate and a number of protrusions fixed on the bottom plate.
  • the protrusions are used to press into concrete to form concrete.
  • the uneven surface enables the new and old concrete bonding surface to be well embedded, the roughening process is easy to control, will not damage the concrete structure, is pollution-free, and has low requirements for the site and the concrete surface.
  • the protrusion has a hollow structure and the side surface is hollow; after the protrusion is pressed into the concrete, the floating slurry is discharged into the interior of the protrusion through the pores, which can effectively reduce the floating slurry on the concrete surface after solidification.
  • the protrusion may be in the shape of a vertebral body, a table or a cylinder, the protrusion is 10-15mm in height, 8-12mm in length, and 8-12mm in width; the protrusion may be preferably a cone, which bears force. The area is small.
  • the protrusions may be provided with at least two specifications, and the protrusions are arranged in an array or staggered, so that the new and old concrete can be embedded more strongly.
  • the above-mentioned embossing material is a rubber structure with a wide range of material sources, and the entire embossing material can be processed into coils in the project, and the construction site can be cut and spliced according to the size of the concrete member, which is beneficial to storage and transportation.
  • the present invention also provides a construction method for roughening the bonding surface of new and old concrete based on the above-mentioned embossing material, which includes the following steps:
  • Step 1 Before the initial setting of the concrete, spread the imprinting material on the surface of the concrete;
  • Step 2 Press the protrusions on the embossing material into the concrete surface
  • Step 3 After the concrete strength reaches 2.5-5MPa, the embossing material is uncovered.
  • the construction method roughens the joint surface of the concrete before it is completely solidified, and the labor input is low; there are a large number of protrusions on the embossing material, and one-time construction can make the concrete joint surface uneven in a large area, with high construction efficiency and easy process It is controlled and not easy to cause damage to the concrete structure, and the construction process is pollution-free and has strong applicability.
  • step 2 it is selected to use a slap and compaction tool to slap the imprinting material
  • the slap and compaction tool includes a slap mechanism and a shaft, and the slap structure is fixed to the shaft.
  • the rod part can be made of wood or other materials; the slap compaction tool can be easily made by selecting materials, the slap surface is flat, the size can be determined according to the actual situation on the spot, the workers can operate outside the concrete pouring surface, and the operation is convenient .
  • the wire brushing tool is used to clean the concrete surface laitance, which is conducive to better bonding the old and new concrete into a whole for concrete curing;
  • the wire brushing tool has certain strength, including steel wire, The brush plate and the handle; the steel wire is fixed on the brush plate, and the brush plate is fixedly connected with the handle.
  • the embossing material of a suitable size is cut in advance according to the structural size of the concrete surface, and holes are made on the embossing material at the position corresponding to the embedded component in the concrete, and the embossing After the material is spread on the concrete surface, the gap between the embossing material and the embedded component is less than or equal to 10mm, so that the embossing material is spread over the entire concrete joint surface as much as possible to ensure the roughness of the new and old concrete joint surface. Chemical strength, with good embedded ability.
  • the present invention adopts embossing material with a specific structure, and uses it in the construction of roughening the bonding surface of new and old concrete, so that the bonding surface has a good embedding ability, and the construction process is easy to control, and it is basically not good for the concrete structure. It can completely avoid the problems of loose surface aggregates, secondary stress damage due to external forces, and water-reducing agents affecting the strength of concrete in the traditional method of construction.
  • the present invention has good environmental protection and energy saving benefits, does not generate a large amount of waste water, noise, dust and other pollutants, and does not need to invest a large amount of mechanical equipment, which is beneficial to saving fuel, electricity and other resources.
  • the present invention has good adaptability to the working environment.
  • the embossing material can be used in the field according to the structural size of the concrete component and the position of the embedded parts, and the embossing material can be used in all projects.
  • the present invention has low cost input, the imprinting material can be used repeatedly for many times, the wire brush and the tapping compaction tool are simple in structure and low in cost.
  • the construction of the invention is convenient, the operators are easy to master, and the workload of worker training is small.
  • FIG. 1 is a schematic diagram of the structure of the imprinting material in Example 1.
  • FIG. 1 is a schematic diagram of the structure of the imprinting material in Example 1.
  • Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1.
  • FIG. 3 is a schematic diagram of another structure of the imprinting material in Embodiment 1.
  • FIG. 3 is a schematic diagram of another structure of the imprinting material in Embodiment 1.
  • Fig. 4 is a construction flow chart of Example 2.
  • Figure 5 is a schematic diagram of the structure of the slap compaction tool.
  • Fig. 6 is a side view of Fig. 5.
  • Figure 7 is a schematic diagram of the structure of the wire brush tool.
  • Fig. 8 is a side view of Fig. 7.
  • Icon 1- imprinting material; 11- bottom plate; 12- protrusion; 2- flap compaction tool; 21- flap mechanism; 22- wooden pole; 3- wire brush tool; 31- wire; 32- brush Board; 33-handle.
  • a deck-type concrete-filled steel tube arch bridge has a total length of 444.96m and a main bridge length of 258m. Its deck adopts a separate structure with a total width of 25.0m.
  • the upper structure of the bridge adopts the "I-shaped steel beam + prefabricated bridge deck" structure, and the deck is divided into blocks Prefabricated, anchored with I-beams by welding nails, bridge decks are connected by post-casting wet joints. After the strength of the wet joints reaches 80%, a 10cm-thick reinforced concrete layer is integrally poured on the top surface of the precast bridge decks. The concrete layer is consolidated by the embedded shear reinforcement on the top surface of the prefabricated bridge deck. In order to meet the anchorage between the precast bridge deck and the post-cast reinforced concrete layer, the top surface of the precast bridge deck needs to be roughened.
  • This embodiment provides an embossing material, as shown in Figures 1-3, including a bottom plate 11 and a number of protrusions 12 fixed on the bottom plate 11.
  • the embossing material 1 can be used for the roughening construction of the bonding surface of new and old concrete. 12 Contact with concrete so that the concrete forms an uneven surface, so that the bonding surface of the new and old concrete can be well embedded, the roughening process is easy to control, it will not damage the concrete structure, is pollution-free, and has low requirements for the site and the surface of the concrete.
  • the protrusion 12 is a hollow structure, and the side of the protrusion is hollowed out. After the protrusion is pressed into the concrete, the floating slurry is discharged into the cone through the pores, which can effectively reduce the floating slurry on the concrete surface after solidification.
  • the protrusion 12 is preferably a hollow cone, but may also have other shapes such as a table or a column.
  • the bottom plate 11 is provided with two specifications of cone protrusions 12, one specification is: height 10mm, bottom diameter 8mm; the other specification is height 15mm, bottom diameter 12mm.
  • the protrusions 12 can be arranged in an array, as shown in Fig. 1, or staggered, as shown in Fig. 3.
  • the two types of cones are arranged on the bottom plate 11 with a thickness of 2mm, and the distance between the centers of the bottom surfaces is 15mm, so that the new and old concrete can be embedded more strongly.
  • the bottom plate 11 can also be all provided with bumps 12 of a uniform specification.
  • the embossing material 1 is made of rubber material.
  • the entire embossing material 1 can be processed into a coil with a width of 1 m in the project.
  • the construction site can be cut and spliced according to the size of the concrete components, which is beneficial to storage and transportation.
  • this embodiment provides a construction method for roughening the bonding surface of new and old concrete, as shown in FIG. 4, which includes the following steps:
  • the gap between the imprinting material 1 and the embedded component, that is, the pore is less than or equal to 10mm, and the imprinting material 1 is as full as possible on the entire concrete joint surface to ensure the roughening strength of the new and old concrete joint surface and have a good embedding ability;
  • the concrete is poured according to the conventional method, and the concrete surface is flattened according to the specific structural size of the concrete;
  • This construction method roughens the joint surface of the concrete before it is completely solidified, and the labor input is low; there are a large number of protrusions 12 on the imprinting material 1, and one-time construction can make the concrete joint surface uneven in a large area, with high construction efficiency and easy process. It is controlled and not easy to cause damage to the concrete structure, and the construction process is pollution-free and has strong applicability.
  • the slap compaction tool 2 can be selected when tapping the imprinting material 1.
  • the slap compaction tool 2 includes a slap mechanism 21 and a wooden pole 22, and the slap structure is fixed to the wooden pole 22. Connection;
  • the slap mechanism 21 is made of wood, and the slap surface is required to be flat. The size can be determined according to the actual situation on site.
  • the slap structure can be set according to the thickness of 50mm, the length of 500mm, and the width of 200mm; the length of the wooden pole 22 should be based on The actual situation of the site is determined, and it only needs to satisfy that the workers can operate outside the concrete pouring surface; the wooden pole 22 and the pressure plate are connected by iron nails or bolts, which needs to meet the requirements of convenient operation by the workers.
  • the slap compaction tool 2 can be easily selected and made, and the operation is convenient.
  • the wire brush tool 3 includes a wire 31, a brush plate 32 and a handle 33.
  • the wire 31 is fixed on the brush plate 32, and the brush plate 32 is fixedly connected to the handle 33.
  • the steel wire 31 needs to meet the rigidity and wear resistance requirements for removing laitance, and can use 1mm diameter, 316 stainless steel wave wire;
  • the brush plate 32 mainly realizes the fixation of the steel wire 31, and its size and material need to be based on the narrow length and length of the cleaning space on site. Set its own weight. If there is no special requirement, a wooden board with a thickness of 20mm, a length of 500mm and a width of 100mm can be used; the handle 33 is set for the convenience of the workers to hold and reduce the bending operation.
  • a steel pipe or solid wood pole 22 with a diameter of 30mm and a length of 1.5m is used.
  • the wires 31 are implanted into the wire planting holes of the brush plate 32 in bundles, and the wire planting holes are arranged at a distance of 10mm.
  • the length of the wires 31 exposed to the brush plate 32 is not less than 35mm.
  • the handle 33 and the brush plate 32 are connected by iron nails or bolts, and the connection angle should meet the requirements of comfortable operation and convenient force for workers, and can be set at 45°.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

一种压印材料（1）及新老混凝土结合面糙化施工方法，该压印材料（1）包括底板（11）和固定在底板（11）上的若干凸起（12），凸起（12）用于形成凹凸不平的混凝土表面。在混凝土初凝前，将压印材料（1）平铺在混凝土表面；然后将压印材料（1）上的凸起（12）压入混凝土面；待混凝土强度达到2.5-5MPa后，揭开压印材料（1）。该压印材料（1）使新老混凝土结合面嵌固良好，糙化过程易控制，适用性强。

Description

一种压印材料及新老混凝土结合面糙化施工方法 技术领域
本发明涉及建筑施工领域，特别是一种压印材料及新老混凝土结合面糙化施工方法。
背景技术
大型建筑施工中常因施工环境及设备限制涉及到新老混凝土层间的锚固，在老混凝土的基础上浇筑新混凝土。新老混凝土结合面是混凝土结构的薄弱点，结合面要求能够良好咬合嵌固，因此需要对结合面进行糙化处理。现阶段结合面的糙化处理方法主要有凿毛法、拉毛法、铣刨法、抛丸法和水冲法。
其中，凿毛法是指采用铁钎加榔头组合、风镐、电镐或凿毛机对混凝土面进行星点式凿击，使结合面呈现凹凸不平粗糙面的施工方法。“铁钎+榔头”是人工进行凿毛，风镐和电镐凿毛法是以气动或电动方式带动镐头进行凿毛，虽省力但仍需要人工扶持，三者方式均投入劳动力大，效率低，凿毛的密度受操作工人的主观判断影响，质量难以控制。凿毛机是采用气动或电动方式使凿毛头高频冲击混凝土结构面，虽然保证凿毛的密度，但对于预埋钢筋较多的结构不能使用；而且由于其冲击力大，不易控制，易对混凝土结构造成破坏。电镐、风镐和凿毛机使用过程中会发出巨大噪音，在市政工程、预制场等工程中有使用限制。
拉毛法是指通过电动或人力方式采用专门的梳齿状工具在混凝土初凝前将表面划刮为一道道条纹的糙化方法。由于拉毛法在划刮过程中会将混凝土面层的骨料刨松，对混凝土结构质量影响很大，且对于预埋钢筋较多的结构也不能使用。
铣刨法是指采用铣刨机对混凝土结合面进行处理的方法，其原理为通过铣刨转子和刀头对混凝土面进行切削，冲击力大，会将表层骨料刨松，使混凝土 结构出现微裂纹等损伤；同时其设备体积大，对作业空间要求高，也不能使用在有预埋钢筋的混凝土面。
抛丸法是指采用抛丸机高速喷射钢丸来撞击混凝土表面，使混凝土表面凹凸不平，其使用过程中会产生大量的粉尘及较大噪音，环境污染严重，有害作业人员的健康，而且其对于有预埋钢筋的混凝土面也不能使用。
水冲法的原理是在需要进行糙化的混凝土表面涂刷缓凝剂，使面层混凝土与下部混凝土之间出现凝结时间差，通过高压水冲洗面层，带走未凝固的胶结材料和细集料，露出粗骨料，实现混凝土面糙化的目的。水冲法是物理作用和化学作用相结合的一种糙化方法，缓凝剂受环境温度、浓度、混凝土水化热等外界因素影响较大，施工现场较难确定准确的冲水时间，对操作人员的能力要求较高。水冲法产生的废水量大，废水中含有减水剂、胶凝材料和细集料，对环境污染严重，无污染处理的难度大。残留缓凝剂会使混凝土结合面强度发展缓慢，人为制造了一层薄弱面，对工程质量影响大，工程技术人员需要慎重使用。
现有的对混凝土结合面的多种糙化方法，各有缺陷，存在劳动力投入大、效率低、环境污染严重、对作业空间的要求高、易对混凝土结构造成损伤、受外界因素影响大、对预埋钢筋混凝土面不适用等问题。
发明内容
本发明的目的在于：针对现有技术存在的问题，提供一种压印材料及新老混凝土结合面糙化施工方法，使得新老混凝土结合面能够良好嵌固，在施工中劳动力投入小、施工效率高、环境污染小、对场地及混凝土表面要求低、不对混凝土结构产生损伤、施工操作方便。
为了实现上述目的，本发明采用的技术方案为：
本发明提供一种用于新老混凝土结合面糙化施工中的压印材料，该压印材料包括底板和固定在所述底板上的若干凸起，所述凸起用于压入混凝土以便混 凝土形成凹凸不平的表面，使得新老混凝土结合面能够良好嵌固，糙化过程易控制、不会对混凝土结构产生损伤，无污染，对场地及混凝土表面要求低。
优选地，所述凸起为空心结构，且侧面为镂空；凸起压入混凝土后，浮浆通过孔隙排入凸起内部，可有效减少凝固后的混凝土表面浮浆。可选择地，所述凸起可为椎体、台体或柱体形状，所述凸起高10-15mm、长8-12mm、宽8-12mm；所述凸起可优选圆锥体，受力面积小。
优选地，所述凸起可设有至少两种规格，所述凸起阵列设置或交错设置，使得新老混凝土的嵌固能力更强。
优选地，上述压印材料为橡胶结构，材料来源广泛，且压印材料整体在工程中可加工为卷材，施工现场可根据混凝土构件的尺寸进行裁剪拼接，有利于存储和运输。
本发明还基于上述压印材料提供一种新老混凝土结合面糙化的施工方法，包括以下步骤：
步骤一，在混凝土初凝前，将所述压印材料平铺在混凝土表面；
步骤二，将所述压印材料上的凸起压入混凝土面；
步骤三，待混凝土强度达到2.5-5MPa后，揭开所述压印材料。
该施工方法在混凝土完全凝固前将其结合面糙化，劳动力投入低；所述压印材料上存在大量凸起，一次性施工就可使得混凝土大面积结合面凹凸不平，施工效率高，过程易控制、不易对混凝土结构造成损伤，且施工过程无污染，适用性强。
优选地，在步骤二中，选取使用拍击压实工具拍击所述压印材料，所述拍击压实工具包括拍击机构和杆部，所述拍击结构和所述杆部相固定连接，所述杆部可以是木质或其它材质；所述拍击压实工具可易地选材制作，拍击面平整，尺寸可根据现场实际情况确定，工人可在混凝土浇筑面外部操作，操作方便。
优选地，在步骤三之后，采用钢丝排刷工具清扫混凝土表面浮浆，有利于新老混凝土更好粘结成整体，以备混凝土养护；所述钢丝排刷工具具有一定的强度，包括钢丝、刷板和手柄；所述钢丝固定在所述刷板上，所述刷板与所述手柄固定连接。
优选地，在步骤一之前，预先根据混凝土面的结构尺寸裁剪合适大小的所述压印材料，并在所述压印材料上对应混凝土中预埋构件位置处进行开孔，待所述压印材料平铺在混凝土面上后，所述压印材料与所述预埋构件的间隙小于或者等于10mm，使所述压印材料尽可能铺满整个混凝土结合面，保证新老混凝土结合面的糙化强度、具有良好的嵌固能力。
综上所述，由于采用了上述技术方案，本发明的有益效果是：
1、本发明采用具有特定结构的压印材料，并将其用于新老混凝土结合面糙化的施工中，使结合面具有良好嵌固能力，且施工过程易控制，对混凝土结构基本不会造成损伤，可以完全避免传统方法施工中所出现的松动表面骨料、因外力作用产生次应力损伤、减水剂影响混凝土强度等问题。
2、本发明环保节能效益好，不会产生大量废水、噪音、扬尘等污染物，同时无需投入大量机械设备，有利于节省燃油、电力等资源。
3、本发明对作业环境适应性好，可根据混凝土构件的结构尺寸和预埋件位置，现场采用裁剪开孔等方式即可使用压印材料，基本可以在所有工程中使用。
4、本发明成本投入低，压印材料可反复多次倒用，钢丝刷、拍击压实工具构造简单，费用低廉。
5、本发明施工便捷，作业人员易掌握，工人培训工作量小。
附图说明
图1是实施例1中压印材料的结构示意图。
图2是图1中A-A向剖视图。
图3是实施例1中压印材料的另一种结构示意图。
图4是实施例2的施工流程图。
图5是拍击压实工具的结构示意图。
图6是图5中的侧视图。
图7是钢丝排刷工具的结构示意图。
图8是图7中的侧视图。
图标：1-压印材料；11-底板；12-凸起；2-拍击压实工具；21-拍击机构；22-木杆；3-钢丝排刷工具；31-钢丝；32-刷板；33-手柄。
具体实施方式
下面结合附图，对本发明作详细的说明。
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
实施例1
某上承式钢管混凝土拱桥全长444.96m，主桥长258m，其桥面采用分离式结构，总宽25.0m，大桥上部结构采用“工型钢梁+预制桥面板”结构，桥面板分块预制，与工型钢梁通过焊钉进行锚固，桥面板间通过后浇湿接缝进行连接，湿接缝强度达到80％以后，在预制桥面板顶面整体浇筑10cm厚的钢筋混凝土层，钢筋混凝土层通过预制桥面板顶面的预埋剪力钢筋进行固结。为满足预制桥面板与后浇钢筋混凝土层间的锚固，预制桥面板顶面需进行糙化处理。
本实施例提供一种压印材料，如图1-3，包括底板11和固定在底板11上的若干凸起12，该压印材料1可用于新老混凝土结合面糙化施工，将凸起12与混凝土接触以便混凝土形成凹凸不平的表面，使得新老混凝土结合面能够良好嵌 固，糙化过程易控制、不会对混凝土结构产生损伤，无污染，对场地及混凝土表面要求低。
其中，如图2，凸起12为空心结构，且凸起侧面为镂空设计，凸起压入混凝土后，浮浆通过孔隙排入锥体内部，可有效减少凝固后的混凝土表面浮浆。凸起12优选空心圆锥体，也可为台体或柱体等其它形状。
进一步地，底板11上设有两种规格的圆锥体凸起12，一种规格为：高10mm、底面直径8mm；另一种规格为高15mm、底面直径12mm。凸起12可阵列设置，如图1，也可交错设置，如图3；两种锥体设置于厚为2mm的底板11上，底面圆心间距15mm，使得新老混凝土的嵌固能力更强。可选择地，底板11上也可全部设置为统一规格的凸起12。
压印材料1采用橡胶材料制作，压印材料1整体在工程中可加工为宽1m的卷材，施工现场可根据混凝土构件的尺寸进行裁剪拼接，有利于存储和运输。
实施例2
基于实施例1，本实施例提供一种新老混凝土结合面糙化的施工方法，如图4，包括以下步骤：
A.预先根据混凝土面的结构尺寸裁剪合适大小的压印材料1，并在压印材料1上对应混凝土中预埋构件位置处进行开孔，使当压印材料1平铺在混凝土面上后，压印材料1与预埋构件的间隙即孔隙小于或者等于10mm，压印材料1尽可能铺满整个混凝土结合面，保证新老混凝土结合面的糙化强度、具有良好的嵌固能力；
B.按常规方法进行混凝土浇筑，根据混凝土特定的结构尺寸将混凝土表面进行收平；
C.在混凝土初凝前，将表面呈现凹凸不平构造的压印材料1平顺铺在混凝土表面；
D.拍击压印材料1，使压印材料1压入混凝土面，使锥体形状的凸起12完全压入混凝土内部，并使浮浆通过锥体侧面的孔充分排出；
E.待混凝土强度达到2.5-5MPa后，揭开压印材料1，对压印材料1空腔内的浮浆进行清理以备下次使用；
F.采用钢丝排刷工具清扫混凝土表面剩余的少量浮浆，漏出新鲜骨料，开始进行混凝土养护。
该施工方法在混凝土完全凝固前将其结合面糙化，劳动力投入低；压印材料1上存在大量凸起12，一次性施工就可使得混凝土大面积结合面凹凸不平，施工效率高，过程易控制、不易对混凝土结构造成损伤，且施工过程无污染，适用性强。
其中，如图5、6，拍击压印材料1时可选取使用拍击压实工具2，拍击压实工具2包括拍击机构21和木杆22，拍击结构和木杆22相固定连接；拍击机构21采用木板制作，要求拍击面平整，尺寸可根据现场实际情况确定，若无特殊要求，拍击结构可按厚50mm、长500mm、宽200mm设置；木杆22长度需根据现场实际情况确定，仅需满足工人可在混凝土浇筑面外部操作即可；木杆22与压板间通过铁钉或螺栓连接，需满足工人操作方便的要求。拍击压实工具2可易地选材制作，操作方便。
如图7、8，钢丝排刷工具3包括钢丝31、刷板32和手柄33，钢丝31固定在刷板32上，刷板32与手柄33固定连接。其中，钢丝31需满足清除浮浆的刚度和耐磨要求，可采用1mm直径，316不锈钢波浪丝；刷板32主要实现钢丝31的固定，其尺寸及材质需根据现场清刷的空间狭窄长度和自身重量设置，无特殊要求情况下，可采用厚度20mm、长500mm，宽100mm的木板；手柄33是为了方便工人持握、减少弯腰作业而设置，可根据工人身高和持握习惯设置，可采用直径30mm、长1.5m的钢管或实心木杆22。钢丝31按束植入刷板32的植丝孔内，植丝孔间距按10mm布置，钢丝31露出刷板32的长度不小于35mm，投 入使用现场试制时，根据清刷效果进一步确定具体尺寸。手柄33与刷板32通过铁钉或螺栓连接，连接角度要满足工人操作舒适、便于发力的要求，可按45°设置。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种压印材料，其特征在于，包括底板(11)和固定在所述底板(11)上的若干凸起(12)，所述凸起(12)用于形成凹凸不平的混凝土表面。
  2. 根据权利要求1所述的一种压印材料，其特征在于，所述凸起(12)为空心结构，且侧面为镂空。
  3. 根据权利要求1所述的一种压印材料，其特征在于，所述凸起(12)为椎体、台体或柱体形状。
  4. 根据权利要求1所述的一种压印材料，其特征在于，所述凸起(12)设有至少两种规格。
  5. 根据权利要求1所述的一种压印材料，其特征在于，所述凸起(12)为阵列设置或交错设置。
  6. 根据权利要求1所述的一种压印材料，其特征在于，所述凸起(12)高10-15mm、长8-12mm、宽8-12mm。
  7. 根据权利要求1-6任一项所述的一种压印材料，其特征在于，压印材料(1)为橡胶结构。
  8. 一种新老混凝土结合面糙化施工方法，其特征在于，基于如权利要求1-7任一项所述的压印材料，包括以下步骤：
    步骤一，在混凝土初凝前，将所述压印材料(1)平铺在混凝土表面；
    步骤二，在混凝土初凝前，将所述压印材料(1)上的凸起(12)压入混凝土面；
    步骤三，待混凝土强度达到2.5-5MPa后，揭开所述压印材料(1)。
  9. 根据权利要求8所述的一种新老混凝土结合面糙化施工方法，其特征在于，在步骤二中，使用拍击压实工具(2)拍击所述压印材料(1)。
  10. 根据权利要求8所述的一种新老混凝土结合面糙化施工方法，其特征在于，在步骤三之后，采用钢丝排刷工具(3)清扫混凝土表面浮浆。
PCT/CN2020/090409 2020-01-13 2020-05-15 一种压印材料及新老混凝土结合面糙化施工方法 WO2021142990A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010033168.8A CN111236013A (zh) 2020-01-13 2020-01-13 一种压印材料及新老混凝土结合面糙化施工方法
CN202010033168.8 2020-01-13

Publications (1)

Publication Number Publication Date
WO2021142990A1 true WO2021142990A1 (zh) 2021-07-22

Family

ID=70874539

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/090409 WO2021142990A1 (zh) 2020-01-13 2020-05-15 一种压印材料及新老混凝土结合面糙化施工方法

Country Status (2)

Country Link
CN (1) CN111236013A (zh)
WO (1) WO2021142990A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111778873A (zh) * 2020-07-31 2020-10-16 中建八局第一建设有限公司 一种箱梁顶板免凿毛提压装置及施工方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000054A1 (en) * 1981-06-25 1983-01-06 STÖCKL, Josef Heat-insulating foam plate
JPH11200620A (ja) * 1998-01-14 1999-07-27 Mitsui Chem Inc コンクリート打設用シート
CN2362960Y (zh) * 1999-02-10 2000-02-09 余志强 建筑模板
JP2011202436A (ja) * 2010-03-26 2011-10-13 Hazama Corp コンクリート用養生シート及びコンクリートの養生方法
CN104328746A (zh) * 2014-10-23 2015-02-04 江苏省交通科学研究院股份有限公司 一种用于混凝土表面处理的板材、使用方法及用途
CN206982949U (zh) * 2017-07-20 2018-02-09 中建科技湖南有限公司 一种用于制作混凝土构件粗糙面的模板
CN108360812A (zh) * 2018-03-22 2018-08-03 中国冶集团有限公司 一种铝合金模板施工装置及其浇筑混凝土面免抹灰的施工方法
CN110355862A (zh) * 2019-05-31 2019-10-22 中建市政工程有限公司 混凝土结合部凿毛装置及其施工方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU43226A1 (zh) * 1963-02-19 1963-04-19
US20040159977A1 (en) * 2003-02-18 2004-08-19 Perfetto Robert S. Method and apparatus for applying a decorative pattern to a surface
KR100849907B1 (ko) * 2007-03-28 2008-08-04 (주)글로윈 산업 콘크리트 바닥 시공 방법
CN103866969A (zh) * 2014-02-27 2014-06-18 中天建设集团有限公司 一种用于生产毛面混凝土用的毛面模板
CN207813041U (zh) * 2017-12-20 2018-09-04 中建八局第四建设有限公司 一种混凝土拉毛覆膜工具式一体化施工装置
CN108894083A (zh) * 2018-07-24 2018-11-27 中建中新建设工程有限公司 一种礓磋地面快速施工工具及施工方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000054A1 (en) * 1981-06-25 1983-01-06 STÖCKL, Josef Heat-insulating foam plate
JPH11200620A (ja) * 1998-01-14 1999-07-27 Mitsui Chem Inc コンクリート打設用シート
CN2362960Y (zh) * 1999-02-10 2000-02-09 余志强 建筑模板
JP2011202436A (ja) * 2010-03-26 2011-10-13 Hazama Corp コンクリート用養生シート及びコンクリートの養生方法
CN104328746A (zh) * 2014-10-23 2015-02-04 江苏省交通科学研究院股份有限公司 一种用于混凝土表面处理的板材、使用方法及用途
CN206982949U (zh) * 2017-07-20 2018-02-09 中建科技湖南有限公司 一种用于制作混凝土构件粗糙面的模板
CN108360812A (zh) * 2018-03-22 2018-08-03 中国冶集团有限公司 一种铝合金模板施工装置及其浇筑混凝土面免抹灰的施工方法
CN110355862A (zh) * 2019-05-31 2019-10-22 中建市政工程有限公司 混凝土结合部凿毛装置及其施工方法

Also Published As

Publication number Publication date
CN111236013A (zh) 2020-06-05

Similar Documents

Publication Publication Date Title
CN106801517B (zh) 一种预制多孔板砖混合结构的校舍体外加固加强方法
CN103266767A (zh) 混凝土结构与填充墙间裂缝防治施工工法
CN1978843A (zh) 钢筋网砂浆薄层加固补强的施工方法
CN105625197A (zh) 一种基于钢板-预应力碳纤维板的混凝土梁抗弯加固方法
CN107143111A (zh) 一种耐磨地坪的施工方法
CN106677355A (zh) 一种楼板孔洞封堵装置及方法
CN102505709A (zh) 基础预制混凝土模板施工方法
CN113718777A (zh) 一种大体积混凝土防裂缝施工方法
WO2021142990A1 (zh) 一种压印材料及新老混凝土结合面糙化施工方法
CN203403670U (zh) 无支撑模板系统
CN108798053A (zh) 一种ecc加固震损框架结构梁柱节点的方法
CN111663770B (zh) 一种现浇板后浇带快易组合定型模具及其施工方法
CN108755394A (zh) 一种预应力筋加固桥梁异形墩柱的方法
CN110878641B (zh) 采用叠合空心楼板格栅体系的加固构造及施工新方法
CN210685019U (zh) 一种具有止水钢板的反坎结构
CN111719869A (zh) 一种砌筑工程施工工艺
CN111996923B (zh) 一种封闭式柱内混凝土灌注方法
CN212866852U (zh) 墙体模板底部封堵装置及模板支撑体系
JP3437954B2 (ja) 既設床の改修工法および既設床の表層除去方法
CN107217865A (zh) 一种主体框架扁梁截面的加大加固施工方法
CN112459517A (zh) 混凝土后置植筋的加固方法
CN110670895A (zh) 一种采用竖向钢板和角钢组合增强砌体结构的韧性及其施工方法
CN219826116U (zh) 一种适用于装配式叠合板的板带模板精准控制支撑工具
CN217001019U (zh) 混凝土板下注浆加固的一体化装置及加固成型的楼板
CN217494608U (zh) 一种预制箱梁承插式封锚模板

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20914295

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20914295

Country of ref document: EP

Kind code of ref document: A1