CN113681708B - Manufacturing method of glass fiber reinforced concrete slab - Google Patents

Abstract

The invention relates to a manufacturing method of a glass fiber reinforced concrete slab. The glass column and thin hollow glass tube are mixed and arranged in a certain proportion, and then the glass column and thin hollow glass are put into the thick hollow glass tube together, and the glass fiber is obtained by stretching and forming, and the drawn glass is placed in the glass fiber. After pouring into the rubber, it continues to draw, which greatly improves the overall toughness of the glass fiber, and then weaves it into a net, which greatly improves the long-range strength and toughness of the glass fiber; the use of multiple layers of glass fiber combined with concrete can greatly improve the concrete. At the same time, different glass fiber densities are used at each level, the outer layer uses a higher glass fiber density, which can improve the impact resistance, and the inner layer uses a lower density glass fiber mesh, which can prevent the inner layer of concrete from being damaged by glass. Delamination breaks due to fiber occupancy occur.

Description

A kind of manufacturing method of glass fiber reinforced concrete slab

technical field

The invention relates to the field of new engineering materials, in particular to a manufacturing method of a glass fiber reinforced concrete slab.

Background technique

Fiberglass (Fiberglass) is an inorganic non-metallic material with excellent performance. Difference. It is made of pyrophyllite, quartz sand, limestone, dolomite, boronite and boronite as raw materials through high temperature melting, wire drawing, winding, weaving and other processes, which is equivalent to a hair. 1/20-1/5, each bundle of fiber strands is composed of hundreds or even thousands of monofilaments. Glass fibers are usually used as reinforcing materials in composite materials, electrical insulating materials and thermal insulation materials, circuit substrates and other fields of the national economy.

Bulletin No. CN105971194B provides a light-transmitting concrete slab with a wire drawing effect and a manufacturing method thereof. A glass fiber mesh cloth layer is arranged between each adjacent two optical fiber cloth layers; the optical fiber cloth layers are included on the same plane. A plurality of optical fibers are arranged in sequence, and each optical fiber is coated with a coupling agent coating. The invention enhances the aesthetics of the product and greatly improves the strength of the product. Publication No. CN108468409A discloses a combined load-bearing prefabricated panel of fabric reinforced concrete and glass fiber reinforced plastic, which can be configured with FRP reinforcement bars along the length of the C-shaped profile according to the bearing capacity requirements, so that the strength of concrete and glass fiber reinforced plastic can be fully utilized. Reinforced concrete slabs can also be load-bearing as walls and floors. However, in actual use, glass fiber generally has insufficient long-range strength due to its short length; and due to the large brittleness of glass fiber, when faced with a large impact, the toughness is insufficient and it is easy to break.

SUMMARY OF THE INVENTION

In view of the above content, in order to solve the above problems, a method for making a glass fiber reinforced concrete slab is provided, comprising the following steps:

Step 1: The glass fiber is stretched and formed, the glass column and the thin hollow glass tube are mixed and arranged in a certain proportion, and then the glass column and the thin hollow glass are put into the thick hollow glass tube together, and the glass fiber is obtained by stretching and forming;

Step 2: pouring glue, pouring rubber into the stretched glass fiber in Step 1, and then pulling it for a second time after pouring into the rubber;

Step 3: Weaving the glass fiber obtained in step 2 after the secondary drawing into a net according to a predetermined shape;

Step 4: Constructing a concrete slab with the woven glass fiber as a skeleton, and obtaining a glass fiber reinforced concrete slab after heat preservation and curing.

The steps of glass fiber drawing and gluing are as follows:

Mix the glass column and the thin hollow glass tube according to a predetermined ratio, wherein the ratio of the glass column and the thin hollow glass tube is 1:1 to 1:2; the outer diameter of the glass column and the thin hollow glass tube are the same as 5-8mm, and the thin hollow glass tube The inner diameter of the glass tube is 3-5mm;

Fill the glass column and thin hollow glass tube into the thick hollow glass tube, the outer diameter of each thick hollow glass tube is 30-50mm and the inner diameter is 25-45mm; the thick hollow glass tube can be filled side by side with multiple glass columns and thin hollow glass tubes. hollow glass tube;

The filled rough hollow glass tube is heated to 500-800 ℃ in a high temperature furnace to soften it, and then the rough hollow glass tube is elongated by vertical drawing, and the first drawing is performed to make the rough hollow glass tube The outer diameter reaches 10-15mm;

Fill the thick hollow glass tube after the first drawing with fluorine rubber, so that the thick hollow glass tube and the thin hollow glass tube are filled with fluorine rubber;

The rough hollow glass tube filled with fluororubber is subjected to secondary drawing at 500° C. to 550° C. so that the outer diameter of the tube of the rough hollow glass becomes 0.2 mm or less to obtain glass fibers.

The toughness of the glass fiber drawn for the second time after pouring glue is greatly improved, and it can be woven into a net, specifically:

The number of 50-150 glass fibers in each bundle is tied into glass fiber bundles, and then the glass fiber bundles are arranged at a distance of 100-200mm, crisscrossing to form a grid, and the glass fiber bundles are arranged in a grid pattern. The crossed position is firmly bonded with water-based polyurethane glue to obtain a glass fiber bundle mesh.

The specific steps for constructing a concrete slab with woven glass fibers as a skeleton are:

Select a glass fiber bundle mesh with a spacing of 100mm to 150mm as the lowermost mesh, and fix it on the top of the concrete mold, and ensure that the distance between the lowermost mesh and the bottom plate of the concrete mould is 5-8mm, and spray water to make the lowermost mesh as a whole soaked;

Fill the mixed concrete slurry into the concrete mold for the first time, so that the concrete height is 10-20mm;

Select a glass fiber bundle mesh with a spacing of 150mm to 200mm as the second layer mesh, spray water to make the second layer mesh wet, place it on top of the concrete, and vibrate to make the second layer mesh well combined with the concrete slurry;

Fill the concrete mold with the mixed concrete slurry for the second time, so that the concrete height is 30-40mm;

Select a glass fiber bundle mesh with a spacing of 150mm to 200mm as the third layer mesh, spray water to make the third layer mesh as a whole soaked, place it above the concrete, and vibrate to make the third layer mesh well combined with the concrete slurry;

Fill the concrete mold with the mixed concrete slurry for the third time, so that the concrete height is 50-60mm;

Select a glass fiber bundle mesh with a spacing of 100mm to 150mm as the fourth layer mesh, spray water to make the fourth layer mesh wet, place it above the concrete, and vibrate to make the fourth layer mesh well combined with the concrete slurry. And the whole is submerged into the concrete.

The weight ratio of cement, quartz sand, light aggregate, water reducing agent and defoamer in the concrete slurry is 1:1:0.14:0.02:0.1, and the water-cement ratio is controlled below 0.15.

After vibrating to make the fourth-layer mesh well combined with the concrete slurry, it is not necessary to directly submerge the fourth-layer mesh into the concrete, but choose to fill the mixed concrete slurry into the concrete mold for the fourth time to make the fourth-layer mesh as a whole submerged in concrete.

In the first drawing, the overall heating method is adopted, the thick hollow glass tube is placed vertically and the thick hollow glass tube is heated as a whole, and the drawing speed is required to be between 1m/min and 1.5m/min;

In the second drawing, the method of local heating is adopted, and the width of one end of the thick hollow glass tube is selected to be 50cm long, and the thick hollow glass tube is drawn during the heating process at a drawing speed of 2m/min to 2.5m/min. between.

The specific parameters of concrete insulation and maintenance are:

Stage 1: 35-50℃, humidity 35-60%, curing time not less than 72 hours;

Stage 2: At room temperature, the humidity is 35-60%, the curing time is not less than 10 days, and water is sprayed on the concrete surface every day, and the water spray volume per unit area is required to reach 200mL/m ² .

The glass fiber is broken during the drawing process, as long as the glass fiber length is greater than 500mm, it can be used;

If the glass fibers constituting the glass fiber bundles are insufficient in length, they are directly lapped and used.

The beneficial effects of the present invention are:

The invention uses the method of mixing and arranging the glass column and the thin hollow glass tube according to a certain ratio, then putting the glass column and the thin hollow glass together into the thick hollow glass tube, and drawing and forming to obtain the glass fiber. After pouring rubber into the glass, it continues to be drawn, which greatly improves the overall toughness of the glass fiber, and then weaves it into a net, which greatly improves the long-range strength and toughness of the glass fiber;

The combination of multiple layers of glass fiber and concrete can greatly improve the strength and toughness of concrete; at the same time, different glass fiber densities are used for each level, and a higher glass fiber density is used for the outer layer, which can improve the impact resistance. The lower density fiberglass mesh prevents delamination fractures that can occur when the inner layer of concrete is occupied by fiberglass.

Description of drawings

The accompanying drawings, which are included to provide a further understanding of the disclosed subject matter, are incorporated into and constitute a part of this specification. The drawings also illustrate implementations of the disclosed subject matter, and together with the detailed description serve to explain principles of implementation of the disclosed subject matter. No attempt has been made to show more structural detail than is required for a basic understanding of the disclosed subject matter and its various ways of practicing.

Fig. 1 is the shape structure schematic diagram of the glass fiber bundle net of the present invention;

Fig. 2 is the rough glass tube cross-sectional schematic diagram of the present invention;

FIG. 3 is a schematic diagram of the concrete layer structure of the present invention.

Detailed ways

The advantages and features of the present invention and the method for achieving the stated objects will be apparent from the accompanying drawings and the following detailed description.

Example 1:

A manufacturing method of a glass fiber reinforced concrete slab, comprising the following steps:

Step 1: The glass fiber is stretched and formed, the glass column and the thin hollow glass tube are mixed and arranged in a certain proportion, and then the glass column and the thin hollow glass are put into the thick hollow glass tube together, and the glass fiber is obtained by stretching and forming;

Step 2: pouring glue, pouring rubber into the stretched glass fiber in Step 1, and then pulling it for a second time after pouring into the rubber;

Step 3: Weaving the glass fiber obtained in step 2 after the secondary drawing into a net according to a predetermined shape;

Step 4: Constructing a concrete slab with the woven glass fiber as a skeleton, and obtaining a glass fiber reinforced concrete slab after heat preservation and curing.

The steps of glass fiber drawing and gluing are as follows:

Mix the glass column and the thin hollow glass tube according to a predetermined ratio, wherein the ratio of the glass column and the thin hollow glass tube is 1:1 to 1:2; the outer diameter of the glass column and the thin hollow glass tube are the same as 5-8mm, and the thin hollow glass tube The inner diameter of the glass tube is 3-5mm;

Fill the glass column and thin hollow glass tube into the thick hollow glass tube, the outer diameter of each thick hollow glass tube is 30-50mm and the inner diameter is 25-45mm; the thick hollow glass tube can be filled side by side with multiple glass columns and thin hollow glass tubes. hollow glass tube;

The filled rough hollow glass tube is heated to 500-800 ℃ in a high temperature furnace to soften it, and then the rough hollow glass tube is elongated by vertical drawing, and the first drawing is performed to make the rough hollow glass tube The outer diameter reaches 10-15mm;

Fill the thick hollow glass tube after the first drawing with fluorine rubber, so that the thick hollow glass tube and the thin hollow glass tube are filled with fluorine rubber;

The rough hollow glass tube filled with fluororubber is subjected to secondary drawing at 500° C. to 550° C. so that the outer diameter of the tube of the rough hollow glass becomes 0.2 mm or less to obtain glass fibers.

The toughness of the glass fiber drawn for the second time after pouring glue is greatly improved, and it can be woven into a net, specifically:

The glass fibers after the secondary drawing are tied into glass fiber bundles in the number of 50 per bundle, and then the glass fiber bundles are arranged at a spacing of 100-200 mm, crisscrossed to form a grid, and the glass fiber bundles are crossed. The position is firmly bonded with water-based polyurethane glue to obtain a glass fiber bundle mesh.

The specific steps for constructing a concrete slab with woven glass fibers as a skeleton are:

Select a glass fiber bundle mesh with a spacing of 150mm as the lowermost mesh, and fix it on the top of the concrete mold, and ensure that the distance between the lowermost mesh and the bottom plate of the concrete mould is 5-8mm, and spray water to make the lowermost mesh as a whole soaked;

Fill the mixed concrete slurry into the concrete mold for the first time, so that the concrete height is 10-20mm;

Select a glass fiber bundle mesh with a spacing of 200mm as the second layer mesh, spray water to make the whole second layer mesh wet, place it on top of the concrete, and vibrate to make the second layer mesh and the concrete slurry well combined;

Fill the concrete mold with the mixed concrete slurry for the second time, so that the concrete height is 30-40mm;

Select a glass fiber bundle mesh with a spacing of 200mm as the third layer mesh, spray water to make the third layer mesh wet, place it on top of the concrete, and vibrate to make the third layer mesh and concrete slurry well combined;

Fill the concrete mold with the mixed concrete slurry for the third time, so that the concrete height is 50-60mm;

Select a glass fiber bundle mesh with a spacing of 150mm as the fourth layer mesh, spray water to make the fourth layer mesh wet, place it on top of the concrete, and vibrate it so that the fourth layer mesh is well combined with the concrete slurry, and the overall submerged in concrete.

The weight ratio of cement, quartz sand, light aggregate, water reducing agent and defoamer in the concrete slurry is 1:1:0.14:0.02:0.1, and the water-cement ratio is controlled below 0.15.

After vibrating to make the fourth-layer mesh well combined with the concrete slurry, it is not necessary to directly submerge the fourth-layer mesh into the concrete, but choose to fill the mixed concrete slurry into the concrete mold for the fourth time to make the fourth-layer mesh as a whole submerged in concrete.

In the first drawing, the overall heating method is adopted, the thick hollow glass tube is placed vertically and the thick hollow glass tube is heated as a whole, and the drawing speed is required to be between 1m/min and 1.5m/min;

In the second drawing, the method of local heating is adopted, and the width of one end of the thick hollow glass tube is selected to be 50cm long, and the thick hollow glass tube is drawn during the heating process at a drawing speed of 2m/min to 2.5m/min. between.

The specific parameters of concrete insulation and maintenance are:

Stage 1: 35-50℃, humidity 35-60%, curing time not less than 72 hours;

Stage 2: At room temperature, the humidity is 35-60%, the curing time is not less than 10 days, and water is sprayed on the concrete surface every day, and the water spray volume per unit area is required to reach 200mL/m ² .

The glass fiber is broken during the drawing process, as long as the glass fiber length is greater than 500mm, it can be used;

If the glass fibers constituting the glass fiber bundles are insufficient in length, they are directly lapped and used.

Example 2:

A manufacturing method of a glass fiber reinforced concrete slab, comprising the following steps:

Step 1: The glass fiber is stretched and formed, the glass column and the thin hollow glass tube are mixed and arranged in a certain proportion, and then the glass column and the thin hollow glass are put into the thick hollow glass tube together, and the glass fiber is obtained by stretching and forming;

Step 2: pouring glue, pouring rubber into the stretched glass fiber in Step 1, and then pulling it for a second time after pouring into the rubber;

Step 3: Weaving the glass fiber obtained in step 2 after the secondary drawing into a net according to a predetermined shape;

Step 4: Constructing a concrete slab with the woven glass fiber as a skeleton, and obtaining a glass fiber reinforced concrete slab after heat preservation and curing.

The steps of glass fiber drawing and gluing are as follows:

Mix the glass column and the thin hollow glass tube according to a predetermined ratio, wherein the ratio of the glass column and the thin hollow glass tube is 1:1 to 1:2; the outer diameter of the glass column and the thin hollow glass tube are the same as 5-8mm, and the thin hollow glass tube The inner diameter of the glass tube is 3-5mm;

Fill the glass column and thin hollow glass tube into the thick hollow glass tube, the outer diameter of each thick hollow glass tube is 30-50mm and the inner diameter is 25-45mm; the thick hollow glass tube can be filled side by side with multiple glass columns and thin hollow glass tubes. hollow glass tube;

The filled rough hollow glass tube is heated to 500-800 ℃ in a high temperature furnace to soften it, and then the rough hollow glass tube is elongated by vertical drawing, and the first drawing is performed to make the rough hollow glass tube The outer diameter reaches 10-15mm;

Fill the thick hollow glass tube after the first drawing with fluorine rubber, so that the thick hollow glass tube and the thin hollow glass tube are filled with fluorine rubber;

The rough hollow glass tube filled with fluororubber is subjected to secondary drawing at 500° C. to 550° C. so that the outer diameter of the tube of the rough hollow glass becomes 0.2 mm or less to obtain glass fibers.

The toughness of the glass fiber drawn for the second time after pouring glue is greatly improved, and it can be woven into a net, specifically:

The glass fibers after the secondary drawing are tied into glass fiber bundles in the number of 150 per bundle, and then the glass fiber bundles are arranged at a distance of 100-200mm, criss-cross to form a grid, and the glass fiber bundles are crossed. The position is firmly bonded with water-based polyurethane glue to obtain a glass fiber bundle mesh.

The specific steps for constructing a concrete slab with woven glass fibers as a skeleton are:

Select a glass fiber bundle mesh with a spacing of 150mm as the lowermost mesh, and fix it on the top of the concrete mold, and ensure that the distance between the lowermost mesh and the bottom plate of the concrete mould is 5-8mm, and spray water to make the lowermost mesh as a whole soaked;

Fill the mixed concrete slurry into the concrete mold for the first time, so that the concrete height is 10-20mm;

Select a glass fiber bundle mesh with a spacing of 200mm as the second layer mesh, spray water to make the whole second layer mesh wet, place it on top of the concrete, and vibrate to make the second layer mesh and the concrete slurry well combined;

Fill the concrete mold with the mixed concrete slurry for the second time, so that the concrete height is 30-40mm;

Select a glass fiber bundle mesh with a spacing of 200mm as the third layer mesh, spray water to make the third layer mesh wet, place it on top of the concrete, and vibrate to make the third layer mesh and concrete slurry well combined;

Fill the concrete mold with the mixed concrete slurry for the third time, so that the concrete height is 50-60mm;

Select a glass fiber bundle mesh with a spacing of 150mm as the fourth layer mesh, spray water to make the fourth layer mesh wet, place it on top of the concrete, and vibrate it so that the fourth layer mesh is well combined with the concrete slurry, and the overall submerged in concrete.

The weight ratio of cement, quartz sand, light aggregate, water reducing agent and defoamer in the concrete slurry is 1:1:0.14:0.02:0.1, and the water-cement ratio is controlled below 0.15.

After vibrating to make the fourth-layer mesh well combined with the concrete slurry, it is not necessary to directly submerge the fourth-layer mesh into the concrete, but choose to fill the mixed concrete slurry into the concrete mold for the fourth time to make the fourth-layer mesh as a whole submerged in concrete.

In the first drawing, the overall heating method is adopted, the thick hollow glass tube is placed vertically and the thick hollow glass tube is heated as a whole, and the drawing speed is required to be between 1m/min and 1.5m/min;

In the second drawing, the method of local heating is adopted, and the width of one end of the thick hollow glass tube is selected to be 50cm long, and the thick hollow glass tube is drawn during the heating process at a drawing speed of 2m/min to 2.5m/min. between.

The specific parameters of concrete insulation and maintenance are:

Stage 1: 35-50℃, humidity 35-60%, curing time not less than 72 hours;

Stage 2: At room temperature, the humidity is 35-60%, the curing time is not less than 10 days, and water is sprayed on the concrete surface every day, and the water spray volume per unit area is required to reach 200mL/m ² .

The glass fiber is broken during the drawing process, as long as the glass fiber length is greater than 500mm, it can be used;

If the glass fibers constituting the glass fiber bundles are insufficient in length, they are directly lapped and used.

The above are only the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (8)

1. A manufacturing method of a glass fiber reinforced concrete slab is characterized by comprising the following steps:

step 1: the glass fiber is stretched and formed, the glass column and the thin hollow glass tube are mixed and arranged according to a predetermined proportion, then the glass column and the thin hollow glass are put into the thick hollow glass tube together, and the glass fiber is obtained through stretching and forming;

step 2: pouring rubber, namely pouring rubber into the glass fiber formed by stretching in the step 1, and performing secondary drawing after pouring the rubber;

and step 3: weaving the glass fiber obtained in the step 2 after the secondary drawing into a net according to a preset shape;

and 4, step 4: constructing a concrete slab by using the glass fiber woven into the net as a framework, and performing heat preservation and maintenance to obtain a glass fiber reinforced concrete slab;

the steps of the glass fiber stretch forming and glue pouring are as follows:

mixing the glass column and the thin hollow glass tube according to a preset ratio, wherein the ratio of the glass column to the thin hollow glass tube is 1:1 to 1: 2; the outer diameters of the glass column and the thin hollow glass tube are the same and are 5-8mm, and the inner diameter of the thin hollow glass tube is 3-5 mm;

filling the glass column and the thin hollow glass tube into the thick hollow glass tube, wherein the outer diameter of each thick hollow glass tube is 30-50mm, and the inner diameter is 25-45 mm; a plurality of glass columns and thin hollow glass tubes can be filled in the thick hollow glass tube side by side;

heating the filled thick hollow glass tube to 800 ℃ in a high-temperature furnace to soften the tube, then elongating the thick hollow glass tube in a vertical drawing mode, and carrying out primary drawing to ensure that the outer diameter of the thick hollow glass tube reaches 10-15 mm;

filling fluororubber into the thick hollow glass tube subjected to primary drawing, so that the thick hollow glass tube and the thin hollow glass tube are filled with the fluororubber;

and (3) carrying out secondary drawing on the rough hollow glass tube filled with the fluororubber at 500-550 ℃ to enable the outer diameter of the rough hollow glass tube to be less than 0.2mm, and obtaining the glass fiber.

2. The method of making a glass fiber reinforced concrete panel according to claim 1, characterized in that:

the toughness of the glass fiber drawn twice after glue pouring is greatly improved, and the glass fiber can be woven into a net, and the method specifically comprises the following steps:

and rolling the glass fibers subjected to secondary drawing into glass fiber bundles according to the number of 50-150 glass fibers per bundle, arranging the glass fiber bundles according to the distance of 100-200mm, criss-cross forming a grid shape, and firmly bonding the crossed positions of the glass fiber bundles by using aqueous polyurethane adhesive to obtain the glass fiber bundle net.

3. The method of making a glass fiber reinforced concrete panel according to claim 2, characterized in that:

the concrete steps of constructing the concrete slab by using the glass fiber woven into the net as the framework are as follows:

selecting a glass fiber bundle net with the distance of 100mm to 150mm as a lowest net, fixing the lowest net above the concrete mould, ensuring that the distance between the lowest net and a bottom plate of the concrete mould is 5-8mm, and spraying water to wet the whole lowest net;

filling the mixed concrete slurry into the concrete mould for the first time to ensure that the height of the concrete is 10-20 mm;

selecting a glass fiber bundle net with the distance of 150mm to 200mm as a second layer net, spraying water to wet the whole second layer net, placing the second layer net above concrete, and vibrating to enable the second layer net to be well combined with concrete slurry;

filling the mixed concrete slurry into the concrete mould for the second time to ensure that the height of the concrete is 30-40 mm;

selecting a glass fiber bundle net with the distance of 150mm to 200mm as a third layer net, spraying water to soak the whole third layer net, placing the third layer net above concrete, and vibrating to ensure that the third layer net is well combined with the concrete slurry;

filling the mixed concrete slurry into the concrete mould for the third time to ensure that the height of the concrete is 50-60 mm;

selecting a glass fiber bundle net with the distance of 100mm to 150mm as a fourth layer net, spraying water to enable the fourth layer net to be soaked in the whole body, placing the fourth layer net above concrete, vibrating to enable the fourth layer net to be well combined with concrete slurry, and enabling the fourth layer net to be immersed in the concrete in the whole body.

4. A method of making glass fibre reinforced concrete panels as claimed in claim 3 wherein:

the concrete slurry comprises cement, quartz sand, light aggregate and a water reducing agent, wherein the weight ratio of the defoaming agent is 1: 1: 0.14: 0.02: 0.1, and the water-cement ratio is controlled below 0.15.

5. A method of making glass fibre reinforced concrete panels as claimed in claim 3 wherein:

and after the fourth layer of net is well combined with the concrete slurry by vibration, the fourth layer of net is not directly immersed into the concrete, and the mixed concrete slurry is filled into the concrete mould for the fourth time, so that the fourth layer of net is entirely immersed into the concrete.

6. The method for manufacturing a glass fiber reinforced concrete panel according to claim 1, wherein:

when the thick hollow glass tube is drawn for the first time, an integral heating mode is adopted, the thick hollow glass tube is vertically placed and integrally heated, and the drawing speed is required to be between 1m/min and 1.5 m/min;

and during the second drawing, a local heating mode is adopted, the width of 50cm of the length of one end of the thick hollow glass tube is selected for heating, and the thick hollow glass tube is drawn in the heating process, wherein the drawing speed is between 2m/min and 2.5 m/min.

7. A method of making glass fibre reinforced concrete panels as claimed in any one of claims 3 to 5 wherein:

concrete heat preservation and maintenance parameters are as follows:

stage 1, humidity is 35-60% at 35-50 ℃, and curing time is not less than 72 hours;

and (2) stage: spraying water to the surface of the concrete every day at room temperature with the humidity of 35-60% and the curing time of not less than 10 days, wherein the water spraying amount per unit area is required to reach 200mL/m ² 。

8. The method of making a glass fiber reinforced concrete panel according to claim 2, characterized in that:

the glass fiber is broken in the drawing process, and can be used as long as the length of the glass fiber is more than 500 mm;

if the length of the glass fibers constituting the glass fiber bundle is insufficient, the glass fibers are directly used in an overlapping manner.

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