A method for producing a glass fiber reinforced cement composite concrete precast building component

Abstract

The application is suitable for the technical field of glass fiber reinforced precast concrete components, and provides a production method of a glass fiber reinforced cement composite precast building component, which comprises the following preparation steps: S1, raw material mixing: according to the component proportion by weight, 30-50% cement and 30-40% quartz sand are added into a mixer, then 1-3% tackifier and 2-4% auxiliary agent are dissolved in 10-15% mixing water, and then 2-3% short-cut alkali-resistant glass fiber is dispersed into the mixing water containing the tackifier and the auxiliary agent. The production method of the glass fiber reinforced cement composite precast building component can place a protective mesh plate on the top of a mold through clamping, the protective mesh plate can permeate water, so as to accelerate the solidification efficiency of the concrete raw materials, improve the finished product quality of the precast building component after solidification, spray water on the precast component and the placed open space, and cover the surface of the precast component with a moisture-retaining canvas, so that the glass fiber reinforced precast concrete component is better water-retained.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of glass fiber reinforced precast concrete components, in particular to a production method of glass fiber reinforced cement composite precast building components. BACKGROUND

[0002] The building industry mainly uses bare concrete or stone as the main material for decoration, which has the disadvantages of unstable structure, poor physical properties, inability to meet the requirements of long-term exposure to sunlight and rain, and high cost. Glass fiber reinforced precast concrete is a new type of inorganic composite material made of alkali-resistant glass fiber as reinforcing material, low-alkali cement as binding material, and suitable aggregate as base material, through production processes such as spraying, vertical molding, extrusion, and flow slurry. Glass fiber reinforced precast concrete board, as a new type of decorative material, has a wide development prospect due to its lightweight, high strength and toughness, and low cost.

[0003] Glass fiber reinforced cement refers to a composite material made of alkali-resistant glass fiber as a reinforcing agent and low-alkali cement mortar as a matrix. The hydration product is mainly ettringite, which makes the cement stone structure dense and reduces the corrosion of alkali solution on glass fiber. It has the characteristics of lightweight, tensile and bending strength, durability, impact resistance, and good processability. It can be made into various complex-shaped products. The forming methods include direct spraying, suction injection, net laying and spraying, net laying and plastering, pre-mixing and vibrating, drawing and flow slurry, etc. The products include roofing tiles (wave tiles, half-wave tiles, ridge tiles, etc.), roofing net rack boards, external wall boards, lightweight partition boards, balcony barriers, external wall insulation boards, ventilation channels, grain stores, warm sheds, rigid waterproof roofs, biogas digesters, reliefs, and architectural ornaments, etc.

[0004] However, the production method of glass fiber reinforced cement composite precast building components in the prior art has poor setting rate of glass fiber reinforced precast concrete components, and after the glass fiber reinforced precast concrete components are set, they are easily too dry in hot weather, reducing the adhesion of the glass fiber reinforced precast concrete components, and thus the production method of glass fiber reinforced precast concrete components in the prior art has certain defects. SUMMARY

[0005] The present application provides a production method of glass fiber reinforced cement composite precast building components, aiming to solve the problem of poor setting rate of glass fiber reinforced precast concrete components and easy drying of glass fiber reinforced precast concrete components after setting.

[0006] The present application is implemented as follows: a production method of glass fiber reinforced cement composite precast building components, comprising the following preparation steps:

[0007] S1, raw material mixing: according to the weight ratio, 30-50% cement and 30-40% quartz sand are added into a mixer, 1-3% tackifier and 2-4% auxiliary agent are dissolved in 10-15% mixing water, then 2-3% chopped alkali-resistant glass fiber is dispersed in the mixing water with tackifier and auxiliary agent, and finally the mixing water with chopped alkali-resistant glass fiber is added into the mixture in the mixer while stirring until uniform;

[0008] S2, raw material molding: first, a filter membrane is laid on the opening mold table, the prefabricated component mold is placed on the filter membrane, and water-based release agent is brushed on the inner wall of the prefabricated component mold, the mixed and stirred concrete raw material in S1 is poured and filled into the prefabricated component mold layer by layer, and a vibrator is used to tamp each layer;

[0009] S3, protection treatment: the concrete waste remaining on the top of the mold is wiped and removed, and a protective mesh plate is placed on the top of the mold by clamping;

[0010] S4, solidification connection: after the concrete raw material is solidified for 6-24h, the prepared load-bearing steel reinforcement is laid in the mold, and part of the steel reinforcement is exposed outside the mold to facilitate the connection of the concrete on the construction site;

[0011] S5, surface treatment: after the surface of the concrete material solidifies, the roughening of the surface of the concrete material is treated and polished, and the surface of the concrete component is treated and leveled;

[0012] S6, mold demolding: first, the fixing bolts are removed, then the fixing supports are removed, and finally the mold plate is removed, and the side and bottom surfaces of the concrete material are treated and the remaining surface roughening of the concrete material is removed;

[0013] S7, component lifting: the prefabricated component is placed in an open place, and epoxy putty is brushed on the surface of the concrete prefabricated component;

[0014] S8, placement and curing: after the epoxy putty in S7 solidifies, the prefabricated component is placed in an open place and watered, and a moisture-retaining canvas is covered on the surface of the prefabricated component.

[0015] Preferably, in S1, the auxiliary agent is one or a mixture of several of polymer emulsion, mineral powder, water reducing agent, defoaming agent, brightener, silicon dioxide, titanium white, color powder, and silica fume.

[0016] Preferably, in S1, the mixer is a forced mixer, the stirring temperature is 25°C, and the stirring time is 15min.

[0017] Preferably, in S2, the thickness of each layer is 20mm, and the vibrator is a flat plate vibrator.

[0018] Preferably, in S3, the protective net plate has a mesh number of 6 meshes, and the protective net plate is fixed by clamping between the mold and the buckle.

[0019] Preferably, in S2, the filter membrane is a fiber felt, the opening diameter of the opening mold table is 0.8 mm, and a plurality of openings are uniformly and spacedly arranged along the surface of the mold table.

[0020] Preferably, in S2, the other end of the pouring pipeline is provided with a material blocking plate, and the pouring height should not be higher than 45 cm.

[0021] Preferably, in S7, the epoxy putty is uniformly coated on the surface of the concrete prefabricated component, and the coating frequency should not be less than 2 times.

[0022] Preferably, in S8, the moisture-retaining canvas is a single-sided silicone rubber coated canvas, and the number of coating layers should not be less than 2 layers.

[0023] Preferably, in S5 and S6, when the roughening and polishing treatment is performed, dust removal equipment needs to be erected at the polishing station.

[0024] Advantages

[0025] Compared with the prior art, the production method of the glass fiber reinforced cement composite concrete prefabricated building component has the following advantages: the protective net plate is clamped and placed on the top of the mold, the protective net plate can permeate water to accelerate the solidification efficiency of the concrete raw material, and impurities can be prevented from entering the mold, thereby improving the quality of the finished product of the solidified concrete prefabricated building component. During the solidification process, the water in the concrete raw material can penetrate through the filter membrane, and the penetrated water can be discharged through the openings on the opening mold table, thereby improving the solidification and molding efficiency of the concrete prefabricated building component, facilitating the production and use of the glass fiber reinforced cement composite concrete prefabricated building component. After the concrete prefabricated building component is solidified and molded, epoxy putty is applied to the surface of the concrete prefabricated component for water retention treatment, water is sprayed on the empty place where the prefabricated component is placed, and moisture-retaining canvas is covered on the surface of the prefabricated component, thereby better retaining water for the glass fiber reinforced prefabricated concrete component, improving the adhesion of the glass fiber reinforced prefabricated concrete component in the later period, facilitating the use of the glass fiber reinforced prefabricated concrete component after production, and enabling the production of various types of products due to the possibility of pouring into special-shaped molds, and being suitable for producing large components. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The flow chart of the production method of the glass fiber reinforced cement composite concrete prefabricated building component of the application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.

[0028] Please refer to Figure 1 The present application provides a technical scheme: a production method of a glass fiber reinforced cement composite concrete prefabricated building component, comprising the following preparation steps:

[0029] S1, raw material mixing: according to the weight ratio, 30-50% cement and 30-40% quartz sand are added to the mixer, then 1-3% tackifier and 2-4% auxiliary agent are dissolved in 10-15% mixing water, then 2-3% short alkali-resistant glass fiber is dispersed in the mixing water containing tackifier and auxiliary agent, and finally the mixing water containing short alkali-resistant glass fiber is added to the mixture in the mixer while stirring until uniform.

[0030] S2, raw material molding: first, lay a layer of filter membrane on the open hole mold table, place the prefabricated component mold on the filter membrane, and brush water-based release agent on the inner wall of the prefabricated component mold, then pour the mixed and stirred concrete raw material in S1 into the prefabricated component mold in layers, and use a vibrator to tamp the layers.

[0031] During the solidification process, the water in the concrete raw material can penetrate through the filter membrane, and the penetrated water can be discharged through the open holes on the open hole mold table, thereby improving the solidification and molding efficiency of the concrete prefabricated building component, and facilitating the production and use of the glass fiber reinforced cement composite concrete prefabricated building component.

[0032] S3, protection treatment: the concrete waste left on the top of the mold is wiped and removed, and a protective mesh plate is placed on the top of the mold.

[0033] The protective mesh plate is placed on the top of the mold, which can allow water to pass through, so as to accelerate the solidification efficiency of the concrete raw material, and can prevent impurities from entering the inside of the mold, thereby improving the finished product quality of the solidified concrete prefabricated building component.

[0034] S4, solidification connection: after the concrete raw material is solidified for 6-24h, the prepared load-bearing type steel reinforcement is laid in the mold, and part of the steel reinforcement is exposed outside the mold, which facilitates the connection of the concrete at the construction site.

[0035] S5, surface treatment: after the surface of the concrete material is solidified, the surface of the concrete material is treated and polished, and the surface of the concrete component is treated and leveled.

[0036] S6, mold demolding: first remove the fixing bolt, then remove the fixed support, and finally remove the formwork, and perform edge treatment on the side surface and bottom surface of the concrete material, and remove the remaining surface of the concrete material.

[0037] S7, component hoisting: placing the prefabricated component in an open place, and brushing epoxy putty on the surface of the concrete prefabricated component.

[0038] S8, placing and curing: after the epoxy putty in S7 solidifies, watering is performed on the open place where the prefabricated component is placed, and a moisture-retaining canvas is covered on the surface of the prefabricated component.

[0039] After the concrete prefabricated building component is solidified and formed, the surface of the concrete prefabricated component is brushed with epoxy putty, the concrete prefabricated component is treated for water retention, watering is performed on the open place where the prefabricated component is placed, and a moisture-retaining canvas is covered on the surface of the prefabricated component, which is better for water retention of the glass fiber reinforced prefabricated concrete component and improves the adhesion of the glass fiber reinforced prefabricated concrete component in the later period.

[0040] The production method is beneficial to the use of the glass fiber reinforced prefabricated concrete component after production, and because the special-shaped model can be poured, various types of products can be produced, and it is also suitable for producing large components.

[0041] Further, in S1, the auxiliary agent is one or a mixture of several of polymer emulsion, mineral powder, water reducing agent, defoaming agent, brightener, silicon dioxide, titanium white powder, color powder, and silica ash.

[0042] In this embodiment, the auxiliary agent is used to improve the waterproofness, corrosion resistance, and crack resistance of the finished concrete prefabricated building component, which is beneficial to prolonging the service life of the concrete prefabricated building component.

[0043] Further, in S1, the stirrer is a forced stirrer, the stirring temperature is 25°C, and the stirring time is 15 minutes.

[0044] In this embodiment, the forced stirrer can basically eliminate the hard material jamming phenomenon, reduce the operating resistance, and reduce wear and tear. The stirring temperature of 25°C improves the mixing effect of the solution.

[0045] Further, in S2, the thickness of each layer is 20mm, and the vibrator is a flat plate vibrator.

[0046] In this embodiment, the flat plate vibrator has high excitation frequency, large excitation force, small amplitude, increased flowability and plasticity of concrete, improved component density, fast molding, and greatly improved manufacturing quality.

[0047] Further, in S3, the mesh number of the protective net plate is 6 meshes, and the protective net plate is fixed by clamping between the mold and the buckle.

[0048] In the embodiment, the protective net plate has a mesh number of 6 meshes, which facilitates water permeation and prevents sundries from entering the mold.

[0049] Further, in the S2, the filter membrane is a fiber felt, the opening diameter of the opening mold table is 0.8 mm, and a plurality of openings are uniformly and spacedly arranged along the surface of the mold table.

[0050] In the embodiment, the fiber felt facilitates water permeation, but the concrete raw material cannot permeate, the opening diameter of 0.8 mm facilitates drainage, and still has a good supporting effect on the mold.

[0051] Further, in the S2, the other end of the pouring pouring pipeline is provided with a material blocking plate, and the height of the pouring material cannot be higher than 45 cm.

[0052] In the embodiment, the height of the pouring material cannot be higher than 45 cm, which facilitates uniform and continuous pouring, avoids strong impact on the slurry surface during material pouring, cooperates with the material blocking plate, and reduces slurry splashing.

[0053] Further, in the S7, the epoxy putty is uniformly coated on the surface of the concrete prefabricated component, and the coating times cannot be less than 2 times.

[0054] In the embodiment, the coating is uniformly coated, and the coating is coated multiple times, so as to improve the water retention performance of the concrete prefabricated building component.

[0055] Further, in the S8, the moisture-retaining canvas is a silicone single-sided rubberized canvas, and the number of coating layers is not less than 2 layers.

[0056] In the embodiment, the silicone single-sided rubberized canvas has the functions of waterproofing, sun protection, and being solid and wear-resistant, thereby improving the water retention protection of the concrete prefabricated building component and improving the adhesion of the concrete prefabricated building component in the later period.

[0057] Further, in the S5 and the S6, when the roughening and polishing treatment is performed, a dust removal device needs to be erected at the polishing station.

[0058] In the embodiment, the dust removal device performs dust removal protection on the concrete prefabricated building component, makes the production environment more green and environmentally friendly, and improves the physical protection of the workers in the production working environment.

[0059] The working principle and use process of the present application: after the installation of the present application, the protective net plate is clamped and placed on the top of the mold, the protective net plate can pass through the moisture, so as to accelerate the solidification efficiency of the concrete raw materials, and to avoid impurities entering the mold, improve the finished product quality of the solidified concrete prefabricated building component, and in the solidification process, the moisture of the concrete raw materials can penetrate through the filter membrane, the penetrated water is discharged through the opening on the opening mold table, thereby improving the solidification forming efficiency of the concrete prefabricated building component, facilitating the production and use of the glass fiber reinforced cement composite concrete prefabricated building component, and after the solidification and forming of the concrete prefabricated building component, the surface of the concrete prefabricated component is coated with epoxy putty, the concrete prefabricated component is treated with water, and the prefabricated component is covered with a moisture-retaining canvas, which better retains the water of the glass fiber reinforced prefabricated concrete component, improves the adhesion of the glass fiber reinforced prefabricated concrete component in the later period, facilitates the use of the glass fiber reinforced prefabricated concrete component after production, and because the special-shaped model can be poured, various types of products can be produced, and it is also suitable for producing large components.

[0060] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for producing a glass fiber reinforced cement composite concrete precast building element, characterized by: The preparation steps include: S1, raw material mixing: according to the weight ratio, 30-50% cement and 30-40% quartz sand are added into a stirrer, 1-3% tackifier and 2-4% auxiliary agent are dissolved in 10-15% mixing water, then 2-3% chopped alkali-resistant glass fiber is dispersed into the mixing water with the tackifier and auxiliary agent, and finally the mixing water with the chopped alkali-resistant glass fiber is added into the mixture in the stirrer while stirring until uniform; S2, raw material molding: a layer of filter membrane is first laid on the open hole mold table, the prefabricated component mold is placed on the filter membrane, and water-based release agent is brushed on the inner wall of the prefabricated component mold, the mixed and stirred concrete raw material in S1 is poured and poured into the prefabricated component mold layer by layer, and a vibrator is used to tamp each layer; S3, protection treatment: the concrete waste remaining on the top of the mold is wiped and removed, and a protective mesh plate is clamped and placed on the top of the mold; S4, solidification connection: after the concrete raw material is solidified for 6-24h, the prepared load-bearing steel reinforcement is laid in the mold, and part of the steel reinforcement is exposed outside the mold to facilitate the connection of the concrete on the construction site; S5, surface treatment: after the surface of the concrete material solidifies, the surface of the concrete material is treated and polished, and the surface of the concrete component is finished and leveled; S6, mold demolding: the fixed bolts are removed first, then the fixed supports are removed, and finally the mold plate is removed, and the side and bottom surfaces of the concrete material are treated and the remaining surface of the concrete material is removed; S7, component lifting: the prefabricated component is placed in an open place, and the surface of the concrete prefabricated component is brushed with epoxy putty; S8, placement and curing: after the epoxy putty in S7 solidifies, the prefabricated component is placed in an open place and watered, and the surface of the prefabricated component is covered with a moisture-retaining canvas.

2. A method of producing a glass fiber reinforced cement composite concrete precast construction element according to claim 1, characterized in that: In S1, the auxiliary agent is one or a mixture of several of polymer emulsion, mineral powder, water reducing agent, defoaming agent, brightener, silicon dioxide, titanium white, color powder, and silica fume.

3. A method of producing a glass fiber reinforced cement composite concrete precast construction element according to claim 1, characterized in that: In S1, the stirrer is a forced stirrer, the stirring temperature is 25°C, and the stirring time is 15min.

4. A method of producing a glass fiber reinforced cement composite concrete precast construction element according to claim 1, characterized in that: In S2, the thickness of each layer is 20mm, and the vibrator is a flat plate vibrator.

5. A method of producing a glass fiber reinforced cement composite concrete precast construction element according to claim 1, characterized in that: In S3, the mesh plate has a mesh number of 6, and the mesh plate is fixed by buckling between the mold.

6. A method of producing a glass fiber reinforced cement composite concrete precast construction element according to claim 1, characterized in that: In S2, the filter membrane is a fiber felt, the opening diameter of the open hole mold table is 0.8mm, and multiple openings are uniformly and interval distributed along the surface of the mold table.

7. A method of producing a glass fiber reinforced cement composite concrete precast construction element according to claim 1, characterized in that: In S2, the other end of the pouring pipeline is provided with a baffle, and the pouring height should not be higher than 45cm.

8. A method of producing a glass fiber reinforced cement composite concrete precast construction element according to claim 1, characterized in that: In S7, the epoxy putty is evenly coated on the surface of the concrete prefabricated component, and the coating times should not be less than 2 times.

9. A method of producing a glass fiber reinforced cement composite concrete precast construction element according to claim 1, characterized in that: In S8, the moisture-retaining canvas is a silicone single-sided coated canvas, and the number of layers of the canvas should not be less than 2.

10. A method of producing a glass fiber reinforced cement composite concrete precast construction element according to claim 1, characterized in that: In S5 and S6, when the surface is treated and polished, a dust removal device needs to be erected at the polishing station.

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