CN111042533A - Construction method of vertical exposed aggregate concrete wall - Google Patents

Construction method of vertical exposed aggregate concrete wall Download PDF

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Publication number
CN111042533A
CN111042533A CN201911399434.2A CN201911399434A CN111042533A CN 111042533 A CN111042533 A CN 111042533A CN 201911399434 A CN201911399434 A CN 201911399434A CN 111042533 A CN111042533 A CN 111042533A
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pouring
concrete
partition plate
exposed aggregate
exposed
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CN201911399434.2A
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CN111042533B (en
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金蓉
邹梦宬
代琦
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金蓉
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work

Abstract

The invention discloses a construction method of a vertical exposed aggregate concrete wall, which comprises the following steps: s1, supporting a pouring template; s2, manufacturing a pouring partition plate; the pouring partition plate is made of a high-strength metal material with a smooth surface; s3, installing a pouring partition plate; before pouring, vertically placing a pouring partition plate in a pouring cavity of a pouring template, and forming a bone material exposed concrete pouring cavity and a common concrete pouring cavity which are mutually independent on two sides of the pouring partition plate; s4, pouring concrete; firstly, pouring exposed aggregate concrete, and then pouring common concrete; and S5, after the ordinary concrete is initially set, the pouring partition plate is upwards drawn out, and in the process of upwards drawing the partition plate, the outer side wall of the pouring template is tapped to improve the fusion degree of the exposed aggregate concrete and the ordinary concrete bonding surface. According to the invention, common concrete is poured on the inner layer, exposed aggregate concrete is filled on the surface, so that the concrete wall body can present abundant texture and color effects without secondary decoration, and the inner layer concrete and the outer layer concrete are not easy to crack and fall off.

Description

Construction method of vertical exposed aggregate concrete wall
Technical Field
The invention belongs to the technical field of decorative concrete wall construction, and particularly relates to a construction method of a vertical exposed aggregate concrete wall.
Background
Exposed aggregate concrete is originated in the 70 th century, is applied in China at the beginning of the century, is widely applied to road pavement and urban squares in recent years, has the characteristics of high durability, one-step forming, no need of secondary decoration, good water permeability and the like, and is a good ground pavement material.
At present, exposed aggregate concrete is influenced by the process, is mostly used in plane pavement engineering, has less application in vertical walls and has certain limitation on the application range. Compared with the bare concrete wall, the exposed concrete wall has the characteristics of rich color and texture.
The Chinese patent with the patent number of 201210203692.0 discloses a method for manufacturing a washing exposed aggregate color concrete external wall panel, which adopts a layered horizontal pouring mode to manufacture the external wall panel, firstly pour color exposed aggregate concrete, pour common concrete after pouring of the color exposed aggregate concrete is finished, and only use a flat vibrator to vibrate the surface of the concrete in order to prevent color mixing with the exposed aggregate color concrete after pouring of the common concrete is finished. The manufacturing method of the wallboard has the following defects: (1) the wall boards are manufactured on the ground (plane construction), and then one wall board is installed on the wall body, so that the whole construction period is long, the wall board is easy to fall off, the area of the wall board cannot be too large, and the number of seams is large; (2) the pouring period of the wall board is long; the common concrete can be poured after the colored exposed aggregate concrete layer is poured and is initially set for a period of time, so that the colored concrete is prevented from being excessively fused with the common concrete; (3) the pouring process is difficult to control; if the setting time of the exposed aggregate colored concrete is too short, the common concrete is poured, so that the two kinds of concrete are too fused, and the color effect is influenced; if the exposed aggregate colored concrete is poured after the setting time is too long, the bonding surfaces of the two types of concrete are not firm, and the wall body is vertically installed during installation, so that the two types of concrete can be separated or fall off after long-time use.
The Chinese invention patent with the patent number of 201711065642.X discloses a method for 3D printing of the surface of a concrete wall and application thereof. When the concrete with exposed aggregate is poured on the formed wall body, the time consumption is long, the cost is high, and the concrete with exposed aggregate on the surface layer is easy to crack and fall off between the surface layer and the printed wall body.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a construction method of a vertical surface exposed aggregate concrete wall, which can apply exposed aggregate concrete to the vertical wall, can enable the concrete wall to present rich texture and color effects without secondary decoration, and simultaneously can prevent inner and outer layer concrete from falling off and cracking.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a construction method of a vertical exposed aggregate concrete wall, which comprises the following steps:
s1, supporting a pouring template; the pouring device is used for pouring and molding concrete;
s2, manufacturing a pouring partition plate; the pouring partition plate is made of a high-strength metal material with a smooth surface;
s3, installing a pouring partition plate; before pouring, vertically placing a pouring partition plate in a pouring cavity of a pouring template, and forming a bone material exposed concrete pouring cavity and a common concrete pouring cavity which are mutually independent on two sides of the pouring partition plate;
s4, pouring concrete; firstly, pouring exposed aggregate concrete, and then pouring common concrete;
and S5, after the ordinary concrete is initially set, the pouring partition plate is upwards drawn out, and in the process of upwards drawing the partition plate, the outer side wall of the pouring template is tapped to improve the fusion degree of the exposed aggregate concrete and the ordinary concrete bonding surface.
Further, in the step S2, the pouring partition plate is made of a stainless steel plate with the thickness of 2-3 mm, the length of the pouring partition plate is less than or equal to 2m, and the height of the pouring partition plate is less than or equal to 0.5 m.
Furthermore, a vertical rib plate is welded on the outer side of the pouring partition plate at intervals, the vertical rib plate is longitudinally arranged on the pouring partition plate, and the width of the vertical rib plate is equal to the thickness of the exposed aggregate concrete.
In S3, before the casting form is installed, an oily release agent is sprayed on both side surfaces of the casting partition.
Further, in S3, partition plates are arranged on the inner side wall of the pouring template at intervals along the length direction, the distance between every two adjacent partition plates is equal to the length of the pouring partition plate, the width of each partition plate is greater than the width of the exposed aggregate concrete pouring cavity, and the partition plates are perpendicular to the pouring template.
Further, in step S5, if the height of the wall is greater than the height of the pouring partition, pouring is performed by a layered pouring method, the pouring height of each layer is 30-50 cm, when the lower layer is poured, and the pouring partition is pulled out upwards, the pouring partition is kept 5-10 cm in the lower layer concrete, and then the upper layer concrete is poured.
Further, in S1, after the formwork is poured, the method further includes the step of binding the steel bars in the pouring cavity, and the distance between the steel bars and the exposed aggregate concrete is greater than 5 cm.
Further, in S1, an ornament is bonded to the inner side wall of the casting mold plate, wherein the ornament is one or more of shells, colored glass, coins and metal parts.
And further, common concrete is poured into the bottom of the pouring template to form the part below the ground of the wall body, exposed aggregate concrete is poured into the top of the pouring template with a reserved height of 5cm, and the exposed aggregate concrete is flattened by a spatula after the pouring is finished.
Further, after the step S5, the method further includes:
s6, removing the die; when the common concrete in the pouring template reaches the template removal strength, removing the pouring template;
s7, surface layer cleaning; cleaning cement slurry on the exposed aggregate concrete surface from top to bottom by adopting a weak acid cleaning agent until aggregates are exposed, and then cleaning the aggregates by using clear water;
s8, repairing; repairing the local damage of the exposed aggregate concrete surface;
s9, sealing; and sealing by adopting a colorless sealant cover.
Compared with the prior art, the invention has the following beneficial effects:
(1) the method is different from the traditional horizontal layered pouring mode, adopts a vertical pouring method, avoids the problem that the fusion degree of exposed aggregate concrete and common concrete is difficult to control, not only ensures the bonding firmness of the common concrete and the exposed aggregate concrete, but also prevents the common concrete from being excessively fused in the exposed aggregate concrete to influence the facing effect.
(2) The exposed aggregate concrete can be applied to the external decoration of the vertical surface, the exposed aggregate concrete is tightly combined with the common concrete, the connection is firmer compared with the traditional modes of washing stone, veneering, dry hanging stone and the like, the color of the wall body is the color of the aggregate, and the problem of color fading cannot occur.
(3) The exposed aggregate concrete is only used on the surface of the wall body, and the common concrete is used inside the wall body, so that the integral strength of the wall body is ensured, and the manufacturing cost is reasonable.
(4) Compared with the scheme that the surface layer exposed aggregate concrete is poured by secondary formwork erection after the templates are poured and removed in the interior, the construction period is saved, the surface layer and the internal structure layer are combined more tightly, and the problems of cracking, falling and the like are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a longitudinal cross-sectional view of a casting form of the present invention.
Fig. 2 is a transverse cross-sectional view of the casting form of the present invention taken along the direction 1-1.
Wherein the reference numerals are specified as follows: the concrete frame is characterized by comprising a pouring template 1, a pouring partition plate 2, an ornament 3, common concrete 4, exposed aggregate concrete 5, a partition plate 6 and a vertical rib plate 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1 and 2, the present embodiment provides a method for constructing a vertical exposed aggregate concrete wall, which specifically includes the following steps:
step one, supporting a pouring template 1; the pouring template 1 can be a wooden template, an aluminum template or a steel template and is used for pouring and forming concrete.
And step two, binding reinforcing steel bars in a pouring cavity of the pouring template 1 for improving the overall strength of the wall body, wherein the reinforcing steel bars are positioned in the middle of the pouring cavity, and the distance from the exposed aggregate concrete 5 to be more than 5cm during pouring is required to be met.
And thirdly, adhering decorations 3 such as shells, colored glass, coins, metal parts and the like to the inner side wall of the pouring template 1, and embedding the inner side wall on the surface of the wall after the inner side wall is taken off.
Step four, the step four can be carried out while carrying out the step one, the step two and the step three, and a pouring clapboard 2 is manufactured; the pouring partition plate 2 should be made of a material which is smooth, high in strength, not easy to deform and small in thickness. Through the contrast, use the stainless steel plate effect that thickness is 2 ~ 3mm best, the length of pouring baffle 2 is confirmed according to the length of wall body, but should not be greater than 2m, otherwise be unfavorable for taking out, the height of baffle should not be greater than 0.5 m. In order to better fix the pouring partition plate 2 in the pouring partition plate 2, one vertical rib plate 7 is welded on one side of the pouring partition plate 2 every 0.5-1 m, the vertical rib plate 7 is longitudinally arranged on the pouring partition plate 2, the width of the vertical rib plate 7 is equal to the thickness of exposed aggregate concrete 5, and the vertical rib plate is used for limiting the thickness of the exposed aggregate concrete 5, and the thickness is 5cm in the embodiment. And a handle is welded on the upper part of the pouring clapboard 2 and is used for gripping when the pouring clapboard 2 is pulled out.
Fifthly, pouring bottom common concrete 4; the lower part foundation (the part not exposed out of the ground) of the wall body is completely made of common concrete 4, the common concrete 4 is made of Portland cement and is doped with an early strength agent, the initial setting time is shortened, and the early strength is improved.
Step six, arranging a pouring partition plate 2; spraying an oily release agent on the outer surface of the pouring partition plate 2 in advance; the step is divided into two conditions, if the length of the wall body is smaller than 2m, the length of the pouring partition plate 2 is consistent with that of the pouring template 1, the pouring partition plate 2 is vertically placed in a pouring cavity of the pouring template 1, the vertical rib plate 7 is in contact with the inner side wall of the pouring template 1, and two sides of the pouring partition plate 2 form an exposed aggregate concrete pouring cavity and a common concrete pouring cavity which are mutually independent. If the length of the wall body is greater than 2m, partition plates 6 need to be arranged on the inner side wall of the pouring template 1 along the length direction, the distance between every two adjacent partition plates 6 is equal to the length of the pouring partition plate 2, the length of the partition plates 6 is 2m in the embodiment, the width of each partition plate 6 is greater than the width of the exposed aggregate concrete pouring cavity, each partition plate 6 is perpendicular to the pouring template 1, and the pouring template 1, the pouring partition plates 2 and the partition plates 6 divide the pouring cavity into a common concrete pouring cavity and an exposed aggregate concrete pouring cavity. The partition plate 6 is made of stainless steel materials, can be drawn out, can also be welded with bound steel bars, and is left in the wall body after pouring.
Seventhly, pouring upper concrete; firstly, exposed aggregate concrete 5 is poured, and then common concrete 4 is poured. The exposed aggregate concrete 5 is sand-free concrete, the particle size is 5-10 cm, and as the thickness of the 5 layers of the exposed aggregate concrete is small, a retarder can be doped to improve the fluidity and the exposed aggregate concrete is properly vibrated. The key point of the step is that the exposed aggregate concrete 5 is poured firstly, and then the common concrete 4 is poured, and multiple tests show that if the common concrete 4 is poured firstly, cement paste in the common concrete 4 can permeate into an exposed aggregate concrete pouring cavity from a gap between the pouring partition plate 2 and the pouring template 1, so that the pouring effect is influenced. The open aggregate concrete 5 is poured firstly, and then the common concrete 4 is poured, so that the fusion of the open aggregate concrete and the common concrete is more facilitated, and the common concrete 4 has better permeability and is beneficial to the fusion of the bonding surface.
Step eight, drawing and pouring the partition plate 2; in order to prevent the ordinary concrete 4 and the exposed aggregate concrete 5 from being excessively fused, the pouring partition plate 2 is drawn out after the ordinary concrete 4 is initially set (when the portland cement is adopted and the early strength agent is mixed, the concrete is initially set 45 minutes to 1 hour after being mixed), and then the concrete is poured. The surface of the common concrete 4 is properly stirred before the partition board 2 is pulled out and poured, the plasticity of the common concrete is improved, then the partition board 2 is slowly pulled out and poured, a wooden hammer or a rubber hammer and the like are used for lightly knocking the outside of the pouring template 1 in the pulling-out process, and the common concrete 4 and the exposed aggregate concrete 5 are properly matched and bonded through vibration. The step is divided into two conditions, if the height of the wall body is less than 50cm (used for a stool and a flower bed), the partition board is completely pulled out after one-time pouring is finished. If the height of the wall body is larger than 50cm, a layered pouring mode is adopted, the pouring height of each layer is 30-50 cm, the lower layer pouring is finished, and when the partition board 2 is pulled out and poured, the height of 5-10 cm is kept in the lower layer concrete, so that the upper layer pouring is facilitated. Aggregate and cement with different colors can be selected for each layer of exposed aggregate concrete 5, so that a natural layering effect is created.
Step nine, pouring top concrete; and (3) reserving the top of the pouring template 1 for 5cm, completely pouring exposed aggregate concrete 5, flattening by using a spatula after pouring, covering a plastic film after spraying a cleaning agent, and curing, wherein the curing step is the same as the method for preparing the exposed aggregate concrete 5 pavement.
Step ten, disassembling the pouring template 1; and removing the pouring template 1 after the internal common concrete 4 reaches the template removing strength.
Step eleven, surface layer cleaning; washing the cement paste on the surface of the exposed aggregate concrete 5 by oxalic acid or other weak acids, wherein the sequence is from top to bottom, spraying for 2-3 times by using a spraying pot or an air pump, dipping the oxalic acid by using a sponge after the surface cement paste is dissolved, and continuously scrubbing until the aggregate of the stone is exposed, and then washing by using clean water.
Step twelve, repairing; and repairing the local damage on the surface of the exposed aggregate concrete 5.
Thirteen, sealing; and sealing by adopting a colorless sealant cover.
According to the invention, the common concrete 4 is poured on the inner layer, and the exposed aggregate concrete 5 is filled on the surface, so that the exposed aggregate concrete 5 can be used on a vertical wall body, the concrete wall body can present abundant texture and color effects without secondary decoration, and the inner layer concrete and the outer layer concrete are not easy to crack and fall off.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and these modifications and improvements are within the spirit and scope of the invention.

Claims (10)

1. A construction method of a vertical exposed aggregate concrete wall is characterized by comprising the following steps:
s1, supporting a pouring template; the pouring device is used for pouring and molding concrete;
s2, manufacturing a pouring partition plate; the pouring partition plate is made of a high-strength metal material with a smooth surface;
s3, installing a pouring partition plate; before pouring, vertically placing a pouring partition plate in a pouring cavity of a pouring template, and forming a bone material exposed concrete pouring cavity and a common concrete pouring cavity which are mutually independent on two sides of the pouring partition plate;
s4, pouring concrete; firstly, pouring exposed aggregate concrete, and then pouring common concrete;
and S5, after the ordinary concrete is initially set, the pouring partition plate is upwards drawn out, and in the process of upwards drawing the partition plate, the outer side wall of the pouring template is tapped to improve the fusion degree of the exposed aggregate concrete and the ordinary concrete bonding surface.
2. The method for constructing a vertical exposed aggregate concrete wall according to claim 1, wherein in step S2, the pouring partition plate is made of a stainless steel plate with a thickness of 2-3 mm, and has a length of 2m or less and a height of 0.5m or less.
3. The method for constructing a vertical exposed aggregate concrete wall according to claim 2, wherein a vertical rib plate is welded at intervals on the outer side of the pouring partition plate, the vertical rib plate is arranged in the longitudinal direction of the pouring partition plate, and the width of the vertical rib plate is equal to the thickness of the exposed aggregate concrete.
4. The method of claim 1, wherein in step S3, before installing the casting form, an oil release agent is sprayed on both side surfaces of the casting partition.
5. The method of claim 1, wherein in step S3, partitions are spaced apart from each other along the length of the inner side wall of the casting form, the distance between adjacent partitions is equal to the length of the casting form, the width of each partition is greater than the width of the exposed aggregate concrete casting cavity, and the partitions are perpendicular to the casting form.
6. The method of claim 1, wherein in step S5, if the height of the wall is greater than the height of the pouring partition, the wall is poured in layers, the pouring height of each layer is 30-50 cm, after the pouring of the lower layer is completed, the pouring partition is retained by 5-10 cm in the lower layer concrete when the pouring partition is pulled out upward, and then the upper layer concrete is poured.
7. The method of claim 1, wherein in step S1, after the form is supported, the method further comprises the step of binding the steel bars in the casting cavity, and the distance between the steel bars and the exposed concrete is greater than 5 cm.
8. The method of claim 1, wherein in step S1, an ornament is adhered to the inner side wall of the casting form, wherein the ornament is one or more of shell, colored glass, coin and metal part.
9. The method of claim 1, wherein the bottom of the casting form is completely cast with normal concrete to form the part of the wall below the ground, the top of the casting form is reserved with 5cm of exposed concrete, and the casting form is flattened by a spatula.
10. The method for constructing a vertical exposed aggregate concrete wall according to claim 1, wherein after the step S5, the method further comprises:
s6, removing the die; when the common concrete in the pouring template reaches the template removal strength, removing the pouring template;
s7, surface layer cleaning; cleaning cement slurry on the exposed aggregate concrete surface from top to bottom by adopting a weak acid cleaning agent until aggregates are exposed, and then cleaning the aggregates by using clear water;
s8, repairing; repairing the local damage of the exposed aggregate concrete surface;
s9, sealing; and sealing by adopting a colorless sealant cover.
CN201911399434.2A 2019-12-30 2019-12-30 Construction method of vertical exposed aggregate concrete wall Active CN111042533B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009263893A (en) * 2008-04-22 2009-11-12 Aica Kogyo Co Ltd Concrete repair layer structure
CN102650152A (en) * 2012-05-14 2012-08-29 中国十七冶集团有限公司 Prefabricated sandwich heat-preservation heat insulation concrete external wall panel and fabrication method
CN102704643A (en) * 2012-06-20 2012-10-03 中国十七冶集团有限公司 Manufacturing method for rinsing exposed aggregate colorful concrete external-hung wallboard
CN103306475A (en) * 2013-07-05 2013-09-18 贵州皆盈科技开发有限公司 Formwork for cast-in-place assembly type filler wall and construction method
CN205100427U (en) * 2015-10-16 2016-03-23 中国十七冶集团有限公司 Compound concrete outer wall board of prefabricated heat preservation
CN107882334A (en) * 2017-11-24 2018-04-06 黄淮学院 A kind of casting method with protective layer concrete filled steel tube

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009263893A (en) * 2008-04-22 2009-11-12 Aica Kogyo Co Ltd Concrete repair layer structure
CN102650152A (en) * 2012-05-14 2012-08-29 中国十七冶集团有限公司 Prefabricated sandwich heat-preservation heat insulation concrete external wall panel and fabrication method
CN102704643A (en) * 2012-06-20 2012-10-03 中国十七冶集团有限公司 Manufacturing method for rinsing exposed aggregate colorful concrete external-hung wallboard
CN103306475A (en) * 2013-07-05 2013-09-18 贵州皆盈科技开发有限公司 Formwork for cast-in-place assembly type filler wall and construction method
CN205100427U (en) * 2015-10-16 2016-03-23 中国十七冶集团有限公司 Compound concrete outer wall board of prefabricated heat preservation
CN107882334A (en) * 2017-11-24 2018-04-06 黄淮学院 A kind of casting method with protective layer concrete filled steel tube

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