Thin-layer wet-spraying plastering-free wall repairing and reinforcing construction method
Through the repair and reinforcement construction method of thin-layer wet spraying walls without plastering, the technology combined with mortar sprayer and concrete sprayer is used to solve the problems of material separation, strength failure and material waste in the concrete spraying construction process in the existing technology, and achieve efficient and environmentally friendly structural reinforcement and reinforcement effects.
Patent Information
- Application Number
- CN202510382595.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2025-05-13
AI Technical Summary
In the prior art, the dry spray method of large-angle wall spray concrete has problems such as low requirements for construction machinery and equipment, non-compliance in green construction, low concrete strength guarantee rate, and prone to quality accidents. In the wet spray method, the aggregate rebounds when encountering the wall, resulting in material separation, the strength does not meet the standards, and material waste is serious.
The thin layer of wet spray plaster-free wall repair and reinforcement construction method is adopted. Mishi-grade concrete is sprayed through a mortar sprayer, and fine stone concrete is sprayed through a concrete sprayer to control the spray speed and pressure to ensure effective bonding and compaction of the materials. After multiple sprays to reach the designed thickness, a low-power mortar sprayer is sprayed through a trowel and compacted to achieve the plastering effect.
It effectively solved the problems of concrete material separation, strength failure and material waste, improved construction efficiency and production efficiency, reduced construction costs, enhanced structural strength, and achieved the goal of green construction.
Smart Images
Figure CN119981483A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of house repair and reinforcement, and in particular to a thin-layer wet spraying plaster-free wall repair and reinforcement construction method. Background Art
[0002] The demand for repair and maintenance of old houses is increasing day by day, and structural reinforcement has gradually become the mainstream of the construction market. The main method of structural reinforcement is vertical wall spraying concrete steel mesh.
[0003] Up to now, large-angle wall shotcrete is all sprayed by dry spraying method. Dry spraying method has low requirements on construction machinery and equipment, which is contrary to green construction. In addition, the strength guarantee rate of concrete after spraying is low, which is prone to quality accidents. When spraying concrete at large angles (vertical walls) by wet spraying method, the rebound of aggregates against the wall will cause segregation of concrete materials. After the concrete on the shotcrete wall is segregated, many unfavorable situations will occur, such as substandard strength and large amount of concrete waste.
[0004] Based on the above problems, a wet spraying and plaster-free wall repair and reinforcement construction method is proposed. Summary of the invention
[0005] The purpose of the present invention is to provide a thin layer wet spraying plaster-free wall repair and reinforcement construction method to solve the problems in the background technology.
[0006] To achieve the above object, the present invention provides a thin layer wet spraying plaster-free wall repair and reinforcement construction method, comprising the following steps:
[0007] S1. Determine the expected spraying thickness according to the construction requirements, configure the rice stone graded concrete and fine stone concrete, and sprinkle water on the wall to be constructed;
[0008] S2, adopt mortar spraying machine to spray the first time of rice stone graded concrete on the wall surface, before the initial setting of the rice stone graded concrete, adopt concrete spraying machine to spray fine stone concrete on the wall surface, compact and cover the rice stone graded concrete, in this process, control the fine stone concrete spraying speed and pressure to ensure that the rice stone concrete can be compacted;
[0009] S3, spraying the fine stone concrete for several times again, and when the difference between the current spraying thickness and the expected spraying thickness is less than 10 mm, stop spraying the fine stone concrete, and level the fine stone concrete surface before the fine stone concrete begins to set;
[0010] S4, using a mortar sprayer to spray rice stone graded concrete again to cover the leveled fine stone concrete surface;
[0011] S5. Use a trowel to compact the surface layer of the rice stone concrete, smooth the surface on multiple sides, and perform curing before the final setting of the rice stone graded concrete surface layer.
[0012] Preferably, in S1, the strength of the rice-stone graded concrete is the same as the strength of the wall to be constructed, the particle size distribution range of the rice-stone graded concrete is 5 to 10 mm, continuous grading is adopted, and the sand ratio is greater than 45%;
[0013] The maximum particle size of fine aggregate concrete is ≤ one third of the expected spraying thickness.
[0014] Preferably, in S1, the main engine power of the mortar spraying machine is 4.5-5.5kw, and the main engine power of the concrete spraying machine is 10-15kw.
[0015] Preferably, in S2, the spraying thickness of the first layer of rice-stone graded concrete is 10 mm to 15 mm, and the spraying thickness of the fine stone concrete is 20 to 30 mm.
[0016] Preferably, in S3, the leveling process is performed using a scraper.
[0017] Preferably, in S4, the covering thickness of the millimetre-stone graded concrete is 10 to 15 mm.
[0018] Preferably, the operations of S3-S4 are all completed before the initial setting of the first layer of stone-graded concrete in S2.
[0019] Preferably, the working surface of the rice-stone graded concrete and the fine-stone concrete and the length of the construction section are determined by the initial setting time of the concrete and the equipment injection volume according to the test section.
[0020] Therefore, the thin layer wet spraying plaster-free wall repair and reinforcement construction method of the present invention has the following beneficial effects:
[0021] (1) A low-power mortar sprayer is used to spray the rice-stone graded concrete (high content of cementitious materials) at a low speed on the wall. The cementitious materials wrap the aggregates and stick to the wall after contacting the wall. At this time, due to the low-speed spraying, the rice-stone graded concrete has a good bond with the wall, and the rice-stone graded concrete has almost no loss, but the density of the rice-stone graded concrete is poor. Then a high-power concrete sprayer is used to spray the fine stone concrete at a high speed on the wall. The aggregates in the fine stone concrete impact the rice-stone graded concrete at a high speed, thereby achieving the effect of compacting the rice-stone graded concrete, and the coarse aggregates in the fine stone concrete are effectively wrapped by the cementitious materials in the rice-stone graded concrete (the first time the aggregates in the fine stone concrete rush into the cementitious materials of the rice-stone graded concrete will increase the strength of the concrete), while avoiding material waste and improving production efficiency, and the fine stone concrete is continued to be sprayed later.
[0022] (2) When the fine stone concrete layer is sprayed multiple times and approaches the designed thickness of the reinforcement, a low-power mortar sprayer is used to spray the stone-graded concrete so that the structural reinforcement and reinforcement surface layer is covered with the stone-graded concrete. The stone-graded concrete is then compacted with a trowel, smoothed multiple times, and then finished to achieve the plastering effect. This operation not only avoids the waste of concrete, but also reduces the conventional structural reinforcement and reinforcement after plastering before decoration. While reducing costs and increasing efficiency, it indirectly improves the structural strength and avoids the situation in which the concrete material segregates during the wet spraying process (vertical wall) in the traditional method (vertical wall) resulting in substandard strength.
[0023] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 The present invention is a flow chart of the surface repair and reinforcement construction method. DETAILED DESCRIPTION
[0025] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.
[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.
[0027] Example
[0028] like Figure 1 As shown, a wall surface is repaired and reinforced by the method protected by the present invention, as follows:
[0029] S1. According to the wall conditions, the expected spraying thickness is determined to be 85mm, and the rice stone graded concrete is configured with a particle size range of 8mm, continuous grading, a sand rate of 60%, and a maximum particle size of 25mm for fine stone concrete. The main power of the mortar sprayer is 5kw, and the main power of the concrete sprayer is 12kw.
[0030] After the preparation work is completed, water the wall to be constructed;
[0031] S2, using a mortar sprayer to spray the first layer of rice stone graded concrete on the wall, the spraying thickness is 15mm, before the initial setting of the rice stone graded concrete, using a concrete spraying machine to spray fine stone concrete on the wall, the thickness is 21mm, because the vacuum pressure of the concrete spraying machine is large, the rice stone graded concrete can be compacted and covered;
[0032] S3, spray the fine stone concrete twice again. At this time, the difference between the current spraying thickness and the expected spraying thickness is less than 10 mm, stop spraying the fine stone concrete, and use a scraper to level the fine stone concrete surface before the fine stone concrete begins to set;
[0033] S4. Use the mortar sprayer to spray the rice stone graded concrete again to cover the leveled fine stone concrete surface with a thickness of 10mm. The above operation must be completed before the first layer of rice stone graded concrete begins to set.
[0034] S5. The bricklayers use a trowel to compact the surface layer of the rice stone concrete, smooth the surface on multiple sides, and perform curing before the final setting of the rice stone graded concrete surface layer.
[0035] After a period of time, it was detected that the wall reinforcement effect was good. Compared with the thin layer formed by the traditional dry spraying method, the reinforcement effect on the structure is better and the reinforcement effect is better. The rice stone graded concrete is sprayed at low speed by a low-power mortar sprayer, and the fine stone concrete is sprayed at high speed by a concrete sprayer before the rice stone graded concrete begins to set. After multiple sprayings of fine stone concrete until the reinforcement thickness requirement is met, a scraper is used to level it, and a low-power mortar sprayer is used to spray it at low speed again. Before the rice stone graded concrete begins to set, it is compacted with a trowel, and then smoothed and finished. After finishing, the effect of a decorative plaster layer can be achieved, which not only avoids the waste of concrete, but also reduces the process of conventional structural reinforcement and plastering after reinforcement before decoration, thereby indirectly improving the structural strength while reducing costs and increasing efficiency.
[0036] Therefore, the thin-layer wet spraying plaster-free wall repair and reinforcement construction method of the present invention effectively solves the problems of conventional concrete spraying construction process, such as fine stone concrete aggregate cannot be effectively bonded to the wall surface, fine stone concrete rebounds against the wall during high-speed spraying, concrete segregates on the wall, and serious concrete waste, through the construction methods and processes such as mortar spraying machine spraying rice stone graded concrete and concrete spraying machine spraying fine stone concrete. It is particularly suitable for strengthening the construction of steel mesh concrete with a thickness of ≤100mm, with high construction efficiency, reduced material waste, and reduced construction procedures.
[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.
Claims
1. A thin layer wet spraying plaster-free wall repair and reinforcement construction method, characterized in that: The following steps are involved: S1. Determine the expected spraying thickness according to the construction requirements, configure the rice stone graded concrete and fine stone concrete, select a mortar sprayer with a power less than 7.5kw and a concrete sprayer with a power greater than 10kw, and sprinkle water on the wall to be constructed after the preparation work is completed; S2, using a mortar sprayer to spray the first layer of rice-stone graded concrete on the wall surface, and before the rice-stone graded concrete is initially set, using a concrete sprayer to spray fine stone concrete on the wall surface to compact and cover the rice-stone graded concrete; S3, spraying the fine stone concrete for several times again, and when the difference between the current spraying thickness and the expected spraying thickness is less than 10 mm, stop spraying the fine stone concrete, and level the fine stone concrete surface before the fine stone concrete begins to set; S4, using a mortar sprayer to spray rice stone graded concrete again to cover the leveled fine stone concrete surface; S5. Use a trowel to compact the surface layer of the rice stone concrete, smooth the surface on multiple sides, and perform curing before the final setting of the rice stone graded concrete surface layer.
2. A thin layer wet spraying plaster-free wall repair and reinforcement construction method according to claim 1, characterized in that: In S1, the strength of the rice-stone graded concrete is the same as the strength of the wall to be constructed, the particle size distribution range of the rice-stone graded concrete is 5 to 10 mm, continuous grading is adopted, and the sand ratio is greater than 45%; The maximum particle size of fine aggregate concrete is ≤ one third of the expected spraying thickness.
3. A thin layer wet spraying plaster-free wall repair and reinforcement construction method according to claim 1, characterized in that: In S1, the power of the mortar spraying machine is 4.5-5.5kw, and the power of the concrete spraying machine is 10-15kw.
4. A thin layer wet spraying plaster-free wall repair and reinforcement construction method according to claim 1, characterized in that: In S2, the spraying thickness of the first layer of rice stone graded concrete is 10 mm to 15 mm, and the spraying thickness of the fine stone concrete is 20 to 30 mm.
5. A thin layer wet spraying plaster-free wall repair and reinforcement construction method according to claim 1, characterized in that: In S3, the leveling process is performed using a scraper.
6. A thin layer wet spraying plaster-free wall repair and reinforcement construction method according to claim 1, characterized in that: In the above S4, the covering thickness of the stone graded concrete is 10 to 15 mm.
7. A thin layer wet spraying plaster-free wall repair and reinforcement construction method according to claim 1, characterized in that: The operations of S3-S4 are all completed before the initial setting of the first layer of stone-graded concrete in S2.