Modification method of basalt fiber chopped yarns for reducing cement concrete cracks
By spraying a modifier on the surface of basalt fiber to form a protective layer, the erosion and wear problems of basalt fiber chopped yarn in a high-alkaline cement-based environment are solved, the durability and dispersibility are improved, and the low-cost production is maintained.
Patent Information
- Application Number
- CN202510915489.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-03
- Publication Date
- 2025-09-23
AI Technical Summary
Basalt fiber chopped yarn is easily corroded in a high-alkaline cement-based environment, resulting in a decrease in mechanical properties. It is also easily worn during cement mixing, affecting the dispersion effect. The existing process increases production costs.
A modifier is sprayed on the surface of basalt fiber. The modifier consists of inorganic powder, low molecular weight epoxy resin, emulsifier and deionized water. The modifier is sprayed during the drawing process through a beam splitting process to form a protective layer to improve wear resistance and erosion resistance.
The durability and dispersibility of basalt fiber chopped yarn are improved, and the interfacial bonding performance with cement concrete is enhanced without significantly increasing production costs.
Smart Images
Figure CN120681968A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of basalt fiber chopped yarns, in particular to a method for modifying basalt fiber chopped yarns for reducing cracks in cement concrete. Background Art
[0002] Basalt fiber chopped yarn has gradually replaced traditional steel fiber and synthetic fiber due to its high strength, corrosion resistance, high temperature resistance and environmental protection properties, and has become an important material for reducing cement concrete cracks.
[0003] Although basalt fiber chopped strands are more corrosion-resistant than steel fibers, they are susceptible to surface erosion after long-term use in highly alkaline cementitious environments, resulting in a decrease in mechanical properties. Furthermore, basalt fiber chopped strands are susceptible to wear during cement mixing, leading to clumping and breakage, which affects dispersion. Existing processes improve the wear resistance of basalt fiber chopped strands through dipping and twisting, but this complex process significantly increases production costs. Summary of the Invention
[0004] In view of the deficiencies in the prior art, the present invention provides a method for modifying basalt fiber chopped yarn for reducing cracks in cement concrete, which can improve the durability and use effect of the basalt fiber chopped yarn without significantly increasing production costs.
[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions: A method for modifying basalt fiber chopped yarn for reducing cement concrete cracks comprises spraying a modifier on the surface of the basalt fiber. The modifier comprises the following raw materials, in parts by weight: 1-5 parts of inorganic powder, 200-300 parts of epoxy resin, 50-100 parts of emulsifier, and 400-600 parts of deionized water.
[0006] In the above technical solution, preferably, the epoxy resin is a low molecular weight epoxy resin.
[0007] In the above technical solution, preferably, a beam drawing process is used, and a modifier is sprayed on the surface of the basalt fiber during the drawing process.
[0008] In the above technical solution, preferably, a beam drawing process is used, and a modifier is sprayed on the surface of the basalt fiber during the drawing process through a nozzle.
[0009] In the above technical solution, preferably, the nozzle is arranged between the oiler and the beam splitter plate.
[0010] In the above technical solution, preferably, the beam splitting process includes a leak plate, an oiler, a beam splitting plate and a beam collecting wheel arranged in sequence, the nozzle is arranged between the oiler and the beam splitting plate, and the basalt fiber passes through the leak plate, the oiler and the beam splitting plate in sequence and is then bundled by the beam collecting wheel.
[0011] In the above technical solution, preferably, the inorganic powder is one or more of fumed silica, titanium dioxide powder, nano-titanium dioxide, and nano-magnesium hydroxide.
[0012] In the above technical solution, preferably, the preparation method of the modifier comprises the following steps: S1. Add epoxy resin and emulsifier into high-speed shear emulsification equipment and start shear stirring; S2. After shear stirring for 5-15 minutes, add deionized water and add inorganic powder just before phase inversion; S3. Continue to add the remaining deionized water to prepare a modifier.
[0013] In the above technical solution, preferably, in step S2, after shear stirring for 10 minutes, a portion of deionized water is slowly added, and the inorganic powder is slowly added when the phase is about to be inverted.
[0014] In the above technical solution, preferably, in step S3, the remaining deionized water is slowly added to prepare the modifier.
[0015] The beneficial effects of the present invention are: The inorganic powder used in the present invention has a density close to that of water. If it is added just before phase inversion, the low molecular weight epoxy resin and the emulsifier can wrap the inorganic powder without significant sedimentation.
[0016] The modifier provided by the present invention can add a protective layer containing inorganic powder to the surface of basalt fiber chopped strands, thereby improving the erosion resistance and durability of the basalt fiber chopped strands. It can also increase the surface roughness of the basalt fiber chopped strands and enhance the interfacial bonding between the basalt fiber chopped strands and cement concrete, thereby improving the performance of the product. In addition, the protective layer can improve the wear resistance of the basalt fiber chopped strands.
[0017] The present invention sprays a modifier between the oiler and the beam splitter plate, so that the surface of the basalt fiber chopped yarn is covered with the modifier before passing through the bunching wheel. The inorganic powder in the modifier can reduce the bundling between the basalt fiber chopped yarn strands and improve the dispersion, thereby improving the dispersion uniformity of the basalt fiber chopped yarn in cement concrete.
[0018] The basalt fiber chopped yarn modification method provided by the present invention only adds a nozzle device and a modifier, does not increase the complexity of the process, and does not significantly increase the production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a front view of the wire drawing process of the present invention.
[0020] Figure 2It is a schematic side view of the wire drawing of the present invention. DETAILED DESCRIPTION
[0021] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figure 1 and Figure 2 A method for modifying basalt fiber chopped yarn for reducing cracks in cement concrete uses a beam drawing process. A nozzle 3 is set between an oiler 2 and a beam splitter plate 4. During the drawing process, the nozzle 3 sprays a modifier onto the surface of the basalt fiber 6 to add a protective layer with inorganic powder on the surface of the basalt fiber chopped yarn. This can improve the erosion resistance and durability of the basalt fiber chopped yarn, increase the surface roughness of the basalt fiber chopped yarn, and improve the interface bonding performance between the basalt fiber chopped yarn and cement concrete, thereby improving the use effect. In addition, the protective layer can improve the wear resistance of the basalt fiber chopped yarn.
[0022] As for the modifier, the modifier includes the following raw materials in parts by weight: 1-5 parts of inorganic powder, 200-300 parts of epoxy resin, 50-100 parts of emulsifier and 400-600 parts of deionized water. As one option, the epoxy resin is a low molecular weight epoxy resin.
[0023] In this embodiment, Figure 1-Figure 2 As shown, the beam splitting process includes a bushing 1, an oiler 2, a nozzle 3, a beam splitting plate 4 and a clustering wheel 5 arranged in sequence. The basalt fiber 6 passes through the bushing 1, the oiler 2 and the beam splitting plate 4 in sequence and is then clustered by the clustering wheel 5.
[0024] As one embodiment, the nozzles may be integrated into one body by components such as a mounting plate, a mounting bar, and a mounting tube, so as to spray the modifier through the multiple nozzles.
[0025] The present application only adds a nozzle device and a modifier, which will not increase the complexity of the process and the production cost will not increase significantly.
[0026] In this embodiment, the preparation method of the modifier includes the following steps: S1. Add low molecular weight epoxy resin and emulsifier into high-speed shear emulsification equipment and start shear stirring.
[0027] S2. After shear stirring for 5-15 minutes, add deionized water, and add inorganic powder just before phase inversion. Specifically, it can be set to shear stirring for 10 minutes, then slowly add part of deionized water, and slowly add inorganic powder just before phase inversion.
[0028] S3. Continue to add the remaining deionized water to obtain a modifier. Specifically, it can be set to continue to slowly add the remaining deionized water to obtain a modifier.
[0029] The inorganic powder can be one or more of fumed silica, titanium dioxide powder, nano-titanium dioxide, and nano-magnesium hydroxide. The inorganic powder has a density close to that of water and is added just before the phase transition, allowing the low-molecular epoxy resin and emulsifier to coat the inorganic powder without significant sedimentation.
[0030] The present invention sprays a modifier between the oiler and the beam splitter plate, so that the surface of the basalt fiber chopped yarn is covered with the modifier before passing through the bunching wheel. The inorganic powder in the modifier can reduce the bundling between the basalt fiber chopped yarn strands and improve the dispersion, thereby improving the dispersion uniformity of the basalt fiber chopped yarn in cement concrete.
[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A method for modifying basalt fiber chopped yarn for reducing cracks in cement concrete, characterized by: A modifier is sprayed on the surface of the basalt fiber. The modifier comprises the following raw materials in parts by weight: 1-5 parts of inorganic powder, 200-300 parts of epoxy resin, 50-100 parts of emulsifier and 400-600 parts of deionized water.
2. The method for modifying basalt fiber chopped yarn for reducing cement concrete cracks according to claim 1, characterized in that: Epoxy resin is a low molecular weight epoxy resin.
3. The method for modifying basalt fiber chopped yarn for reducing cement concrete cracks according to claim 1, characterized in that: The fiber is drawn using a splitting process, and a modifier is sprayed on the surface of the basalt fiber during the drawing process.
4. The method for modifying basalt fiber chopped yarn for reducing cracks in cement concrete according to claim 1, characterized in that: The fiber is drawn using a splitting process, and the modifier is sprayed on the surface of the basalt fiber during the drawing process through a nozzle.
5. The method for modifying basalt fiber chopped yarn for reducing cement concrete cracks according to claim 4, characterized in that: The nozzle is arranged between the oiler and the beam splitter plate.
6. The method for modifying basalt fiber chopped yarn for reducing cement concrete cracks according to claim 4, characterized in that: The beam splitting process includes a leak plate, an oiler, a beam splitting plate and a beam collecting wheel arranged in sequence. The nozzle is set between the oiler and the beam splitting plate. The basalt fiber passes through the leak plate, the oiler and the beam splitting plate in sequence and is then bundled by the beam collecting wheel.
7. The method for modifying basalt fiber chopped yarn for reducing cracks in cement concrete according to claim 1, characterized in that: The inorganic powder is one or more of fumed silica, titanium dioxide powder, nano titanium dioxide and nano magnesium hydroxide.
8. A method for modifying basalt fiber chopped yarn for reducing cracks in cement concrete according to any one of claims 1 to 7, characterized in that: The preparation method of the modifier comprises the following steps: S1. Add epoxy resin and emulsifier into high-speed shear emulsification equipment and start shear stirring; S2. After shear stirring for 5-15 minutes, add deionized water and add inorganic powder just before phase inversion; S3. Continue to add the remaining deionized water to prepare a modifier.
9. The method for modifying basalt fiber chopped yarn for reducing cement concrete cracks according to claim 8, characterized in that: In step S2, after shear stirring for 10 minutes, a portion of deionized water is slowly added, and the inorganic powder is slowly added when the phase is about to be inverted.
10. The method for modifying basalt fiber chopped yarn for reducing cement concrete cracks according to claim 9, characterized in that: In step S3, the remaining deionized water is slowly added to prepare a modifier.