CN114075059A - Ultra-high performance concrete composition capable of being constructed by spraying - Google Patents
Ultra-high performance concrete composition capable of being constructed by spraying Download PDFInfo
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- CN114075059A CN114075059A CN202010832620.7A CN202010832620A CN114075059A CN 114075059 A CN114075059 A CN 114075059A CN 202010832620 A CN202010832620 A CN 202010832620A CN 114075059 A CN114075059 A CN 114075059A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an ultrahigh-performance concrete composition capable of being constructed by spraying. The concrete composition consists of a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent; the composite cementing material comprises cement and an admixture, the thixotropic agent is a clay mineral with a chain lamellar structure, the graded fine sand is selected from any one of river sand, quartz sand and machine-made sand, and the special fiber is any one or mixture of two of chopped fiber or continuous high-zirconium alkali-resistant glass fiber in any proportion; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate is not lower than 40%. The concrete composition has good fluidity and thixotropy after spraying under the condition of ultralow water-to-gel ratio, does not sag, can be suitable for construction of various spraying devices, can be suitable for construction of positions of vertical surfaces, top surfaces, curved surfaces and the like of multi-material moulds, can be used for preparing ultrahigh-performance concrete members or decorative products with complex shapes, and has wide application prospect.
Description
Technical Field
The invention relates to the field of concrete, in particular to an ultrahigh-performance concrete composition capable of being constructed by spraying.
Background
The ultra-high performance concrete is suitable for manufacturing exterior wall decorative plates due to the excellent mechanical property and durability, particularly the characteristics of bending resistance, low water absorption, high surface compactness, pollution resistance and the like. The conventional pouring mode can only be used for preparing a planar decorative plate, and under the background that the modeling of the building outer decorative plate is increasingly complicated, refined and greatly surfaced, a slope, a vertical surface, a hyperbolic or multi-curved surface and a three-dimensional decorative plate need to be prepared, and the direct pouring mode is difficult to realize, so that a UHPC material system capable of being formed by spraying is urgently required to be developed.
Patent cn201910627894.x discloses a spray-type ultrahigh-performance decorative concrete material and a preparation method thereof, but technical shortcuts such as slightly small fine sand particle size (large shrinkage), addition of polymer emulsion (influencing hydration and reducing strength), use of excessive alkali-resistant glass fibers and the like exist. Based on the above needs, the present invention provides a sprayable ultra-high performance concrete composition.
Disclosure of Invention
In order to solve the problems of high difficulty, low construction efficiency and the like of non-planar ultrahigh-performance concrete formwork support, the invention mainly provides a sprayable ultrahigh-performance concrete composition to meet the requirement of efficient preparation of special-shaped structures.
The invention provides an ultrahigh-performance concrete composition capable of being constructed by spraying, which is prepared from a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent in a mass ratio of 400-600: 1.5-25: 600-400: 0.5-60: 6-20;
the composite cementing material comprises cement and an admixture, wherein the mass ratio of the cement to the admixture is 1: 0.15-0.50, wherein the median particle size of the admixture is 5-30 microns;
the cement is selected from any one or more of Portland cement, ordinary Portland cement, white cement, sulphoaluminate cement and high aluminate cement; the admixture is selected from any two or more than two of ash silica fume, white silica fume, fly ash, micro-beads, superfine mineral powder, superfine calcium carbonate and metakaolin which are mixed in any proportion;
the thixotropic agent is a clay mineral with a chain lamellar structure; the thixotropic agent is preferably attapulgite or montmorillonite;
the graded fine sand comprises the following three types of fine sand with grain size grading according to mass percentage:
0 to 20 percent of fine sand with the grain diameter of 20 to 40 meshes,
0 to 30 percent of fine sand with the grain diameter of 40 to 70 meshes,
50-100% of fine sand with the grain diameter of 70-120 meshes,
the sum of the mass percentages of the three types of fine sand with the grain size grading is 100 percent;
the graded fine sand is selected from any one of river sand, quartz sand and machine-made sand, and preferably the river sand or the quartz sand;
the special fiber is any one or mixture of two of chopped fiber or continuous high-zirconium alkali-resistant glass fiber in any proportion;
the diameter range of the chopped fiber is 0.10-0.35mm, and the fiber length is 5.0-18.0 mm; the chopped fibers are selected from more than one of chopped polypropylene fibers, chopped polyvinyl alcohol fibers and chopped polyformaldehyde fibers which are mixed in a single specification or more than one of fibers which are mixed in different specifications, wherein the more than one of the fibers in different specifications comprises different fibers which are mixed in the same specification or different fibers which are mixed in different specifications;
the fineness of the bundle-shaped fiber of the continuous high-zirconium alkali-resistant glass fiber is 20000-30000 dtex;
the synthetic chopped fiber or continuous high-zirconium alkali-resistant glass fiber has the main functions of improving cohesiveness, reducing resilience in the concrete spraying process and improving anti-cracking and toughening effects in a spraying UHPC system;
the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate is not lower than 40%.
The special fiber, the chopped fiber, is added in a premixing mode with the ultra-high performance concrete composition, and the continuous alkali-resistant glass fiber is cut off and added on line through a special spraying machine spray gun cutting machine.
The invention relates to an application method of a sprayable construction ultrahigh-performance concrete composition, which comprises the following steps:
(1) weighing raw material cement, admixture, thixotropic agent, graded fine sand, special fiber and water reducing agent, adding the weighed materials into a mortar mixer, and stirring and mixing the materials to form premix;
(2) when the special fiber is the chopped fiber, the premix and the special fiber are mixed in a concrete mixer and then are subjected to injection construction by a mortar injection machine;
(3) when the special fiber contains continuous high-zirconium alkali-resistant glass fiber, the materials except the glass fiber are mixed by a stirrer, and then the glass fiber is mixed and sprayed with the mixture at the nozzle of the mortar spraying machine.
The ultra-high performance concrete composition capable of being sprayed and constructed can be added with pigment or color paste according to the target requirement to adjust the color and the shape of the final product, and the pigment is added according to the actual requirement.
The invention has the following beneficial effects:
(1) the method breaks through the limitation that the conventional ultra-high performance concrete (UHPC) can only be cast and molded, can prepare complex non-planar UHPC products with special shapes, curved surfaces and the like, and enriches the product types;
(2) when UHPC is sprayed only by using the synthetic fiber reinforcement, the UHPC is directly sprayed at one time, so that layered guniting is avoided, fibers are not exposed on the surface layer of the contact surface of the UHPC and the UHPC, and the production efficiency is further improved;
(3) the ultra-high performance concrete composition with spraying construction has good fluidity and thixotropy after spraying under the condition of ultra-low water-to-glue ratio, does not sag, can be suitable for construction of various spraying devices, can be suitable for construction of positions such as vertical surfaces, top surfaces and curved surfaces of multi-material moulds, can be used for preparing ultra-high performance concrete members or decorative products with complex shapes, and has wide application prospect.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Comparative example 1
The ultra-high performance concrete composition capable of being sprayed and constructed consists of a composite cementing material, a thixotropic agent, graded fine sand and a water reducing agent, wherein the mass ratio of the composite cementing material to the thixotropic agent is 600: 1.5: 400: 20; the composite cementing material is formed by mixing 52.5 parts of small wild field common silicate, ash silica fume and superfine mineral powder according to the mass ratio of 8:1: 1; the thixotropic agent is montmorillonite; the graded fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three kinds of sand is 10 percent, 30 percent and 60 percent; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 45 percent produced by Jiangsu Subot new material company Limited.
Comparative example 2
The ultra-high performance concrete composition capable of being sprayed and constructed consists of a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio of the composite cementing material to the thixotropic agent is 600: 1.5: 400: 60: 20; the composite cementing material is formed by mixing 52.5 parts of small wild field common silicate, ash silica fume and superfine mineral powder according to the mass ratio of 8:1: 1; the thixotropic agent is montmorillonite; the graded fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three kinds of sand is 10 percent, 30 percent and 60 percent; the special fiber is common glass fiber; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 45 percent produced by Jiangsu Subot new material company Limited.
Example 1
The ultra-high performance concrete composition capable of being sprayed and constructed consists of a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio of the composite cementing material to the thixotropic agent is 600: 1.5: 400: 60: 20; the composite cementing material is formed by mixing 52.5 parts of small wild field common silicate, ash silica fume and superfine mineral powder according to the mass ratio of 8:1: 1; the thixotropic agent is montmorillonite; the graded fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three kinds of sand is 10 percent, 30 percent and 60 percent; the special fiber is polyformaldehyde fiber with the length of 12 mm and the diameter of 0.2 mm; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 45 percent produced by Jiangsu Subot new material company Limited.
Example 2
The ultra-high performance concrete composition capable of being sprayed and constructed consists of a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio of the composite cementing material to the thixotropic agent is 500: 5.0: 500: 10: 18; the composite cementing material is formed by mixing 52.5 parts of small wild field silicate, white silica fume and micro-beads according to the mass ratio of 7.5:2.0: 0.5; the thixotropic agent is attapulgite; the graded fine sand is 20-40 mesh, 40-70 mesh and 70-120 mesh quartz sand, and the mass percentage of the three kinds of sand is 0 percent, 25 percent and 75 percent; the special fiber is a mixture of polyformaldehyde with the length of 12 mm and the diameter of 0.2 mm and polyvinyl alcohol fiber, and the mass ratio is 7: 3; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 42 percent produced by Jiangsu Subot new material company Limited.
Example 3
A sprayable ultra-high performance concrete composition comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio is 560: 25: 440: 10: 18; the composite cementing material is prepared by mixing 52.5 parts of small wild field silicate, superfine calcium carbonate, superfine mineral powder and white silica fume according to the mass ratio of 7:1.0:1.0: 1.0; the thixotropic agent is attapulgite; the graded fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three kinds of sand is 15 percent to 70 percent; the special fiber is a mixture of polyformaldehyde fiber with the length of 6 mm and the diameter of 0.2 mm, polyvinyl alcohol fiber with the length of 18 mm and the diameter of 0.35mm and alkali-resistant glass fiber with the high zirconium of 20000 decitex, and the mass ratio is 4:4: 2; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 40 percent produced by Jiangsu Subot new material company Limited.
Example 4
The ultrahigh-performance concrete composition capable of being constructed by spraying comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio of the composite cementing material to the thixotropic agent is 480: 10: 520: 18: 20; the composite cementing material is prepared by mixing 52.5 parts of Albo white cement, superfine calcium carbonate, superfine mineral powder and white silica fume according to the mass ratio of 7:1.0:1.0: 1.0; the thixotropic agent is attapulgite; the graded fine sand is river sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three kinds of sand is 15 percent to 70 percent; the special fiber is a mixture of polyformaldehyde fiber with the length of 6 mm and the diameter of 0.2 mm, polyvinyl alcohol fiber with the length of 12 mm and the diameter of 0.30 mm and high-zirconium alkali-resistant glass fiber with the mass ratio of 3:3: 4; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 45 percent produced by Jiangsu Subot new material company Limited.
Example 5
The ultrahigh-performance concrete composition capable of being constructed by spraying comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio of the composite cementing material to the thixotropic agent is 480: 10: 520: 18: 20; the composite cementing material is prepared from 52.5 parts of silver fir white cement, sulphoaluminate cement, fly ash, white silica fume and metakaolin according to the weight ratio of 8:0.5:1.0: 0.3: 0.20 by mass ratio; the thixotropic agent is montmorillonite; the graded fine sand is machine-made sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three kinds of sand is 25 percent to 0 percent to 75 percent; the special fiber is a mixture of polyformaldehyde fiber with the length of 12 mm and the diameter of 0.30 mm and polyvinyl alcohol fiber with the length of 9 mm and the diameter of 0.15 mm, and the mass ratio is 8: 2; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 40 percent produced by Jiangsu Subot new material company Limited.
Example 6
The ultrahigh-performance concrete composition capable of being constructed by spraying comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio of the composite cementing material to the thixotropic agent is 480: 10: 520: 18: 20; the composite cementing material is 52.5 parts of Albo white cement, high aluminate cement, superfine calcium carbonate, white silica fume and metakaolin, and the weight ratio of the composite cementing material to the metakaolin is 8.5:0.3:0.4: 0.3: 0.5 by mass ratio; the thixotropic agent is attapulgite; the graded fine sand is machine-made sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three kinds of sand is 0 percent to 100 percent; the special fiber is a mixture of polyformaldehyde fiber with the length of 12 mm and the diameter of 0.30 mm and polypropylene fiber with the length of 9 mm and the diameter of 0.15 mm, and the mass ratio is 5: 5; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 40 percent produced by Jiangsu Subot new material company Limited.
Example 7
The ultra-high performance concrete composition capable of being sprayed and constructed consists of a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio of the composite cementing material to the thixotropic agent is 600: 1.5: 400: 60: 20; the composite cementing material is formed by mixing 52.5 parts of small wild field common silicate, ash silica fume and superfine mineral powder according to the mass ratio of 8:1: 1; the thixotropic agent is montmorillonite; the graded fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three kinds of sand is 10 percent, 30 percent and 60 percent; the special fiber is polyformaldehyde fiber with the length of 12 mm and 6 mm and the diameter of 0.2 mm, and the mass ratio is 1: 1; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 45 percent produced by Jiangsu Subot new material company Limited.
Example 8
The ultra-high performance concrete composition capable of being sprayed and constructed consists of a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio of the composite cementing material to the thixotropic agent is 600: 1.5: 400: 60: 20; the composite cementing material is formed by mixing 52.5 parts of small wild field common silicate, ash silica fume and superfine mineral powder according to the mass ratio of 8:1: 1; the thixotropic agent is montmorillonite; the graded fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three kinds of sand is 10 percent, 30 percent and 60 percent; the special fiber is continuous high-zirconium alkali-resistant glass fiber; the water reducing agent is a polycarboxylic acid water reducing agent with the water reducing rate of 45 percent produced by Jiangsu Subot new material company Limited.
The concrete compositions of the examples and comparative examples were stirred and formed after adding water, and then performance tests were performed, wherein the water-to-cement ratio was 0.20, and the performance results are shown in table 1.
TABLE 1 Properties of ultra-high Performance concrete prepared in examples and comparative examples
| Sample (I) | Compressive strength/MPa | Flexural strength/MPa | Rebound Rate/%) | Whether or not to sag |
| Comparative example 1 | 123.5 | 18.4 | 8.3 | Is that |
| Comparative example 2 | 126.7 | 19.5 | 5.2 | Whether or not |
| Example 1 | 140.8 | 22.7 | 3.4 | Whether or not |
| Example 2 | 134.2 | 20.5 | 2.9 | Whether or not |
| Example 3 | 137.7 | 21.4 | 3.0 | Whether or not |
| Example 4 | 129.4 | 19.3 | 3.7 | Whether or not |
| Example 5 | 127.9 | 20.2 | 3.4 | Whether or not |
| Example 6 | 133.6 | 21.9 | 3.1 | Whether or not |
| Example 7 | 136.1 | 22.3 | 3.2 | Whether or not |
| Practice ofExample 8 | 130.3 | 20.8 | 3.6 | Whether or not |
The data in table 1 show that the ultra-high performance concrete composition with good fluidity and thixotropy after spraying and no sagging are achieved under the condition of ultra-low water-binder ratio, the ultra-high performance concrete composition with good fluidity and thixotropy after spraying is suitable for construction of various spraying devices, is suitable for construction of positions such as vertical surfaces, top surfaces and curved surfaces of multi-material moulds, can be used for preparing ultra-high performance concrete members or decorative products with complex shapes, and has wide application prospect. Compared with comparative examples 1 and 2, the concrete in the examples has higher compression strength and rupture strength and lower rebound rate.
Claims (8)
1. The ultra-high performance concrete composition capable of being constructed by spraying is characterized by comprising a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent according to a mass ratio of 400-600: 1.5-25: 600-400: 0.5-60: 6-20;
the composite cementing material comprises cement and an admixture, wherein the mass ratio of the cement to the admixture is 1: 0.15-0.50, wherein the median particle size of the admixture is 5-30 microns;
the thixotropic agent is a clay mineral with a chain lamellar structure;
the graded fine sand comprises the following three types of fine sand with grain size grading according to mass percentage:
0 to 20 percent of fine sand with the grain diameter of 20 to 40 meshes,
0 to 30 percent of fine sand with the grain diameter of 40 to 70 meshes,
50-100% of fine sand with the grain diameter of 70-120 meshes,
the sum of the mass percentages of the three types of fine sand with the grain size grading is 100 percent;
the graded fine sand is selected from any one of river sand, quartz sand and machine-made sand;
the special fiber is any one or mixture of two of chopped fiber or continuous high-zirconium alkali-resistant glass fiber in any proportion; the diameter range of the chopped fiber is 0.10-0.35mm, and the fiber length is 5.0-18.0 mm;
the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate is not lower than 40%.
2. The sprayable ultra-high performance concrete composition of claim 1, wherein the cement is selected from the group consisting of portland cement, ordinary portland cement, white cement, sulphoaluminate cement, and peraluminate cement, and mixtures thereof.
3. The sprayable ultra-high performance concrete composition of claim 1, wherein the admixture is selected from the group consisting of wollastonite, white silica, fly ash, micro beads, ultra-fine mineral powder, ultra-fine calcium carbonate, and metakaolin, in any ratio of two or more.
4. The sprayable ultra-high performance concrete composition of claim 1, wherein the thixotropic agent is attapulgite or montmorillonite.
5. The sprayable ultra-high performance concrete composition of claim 1, wherein the graded fine sand is selected from river sand or quartz sand.
6. The sprayable ultra-high performance concrete composition of claim 1, wherein the chopped fibers are selected from the group consisting of chopped polypropylene fibers, chopped polyvinyl alcohol fibers and chopped polyoxymethylene fibers, wherein the chopped fibers are mixed in a single specification or in different specifications, and wherein the different specifications of the fibers comprise different fibers mixed in a single specification or different specifications.
7. The sprayable ultrahigh-performance concrete composition of claim 1, wherein the continuous high-zirconium alkali-resistant glass fibers have a fiber size of 20000-30000 dtex.
8. The method of using a sprayable ultra-high performance concrete composition of any of claims 1 to 7, comprising the steps of:
(1) weighing raw material cement, admixture, thixotropic agent, graded fine sand, special fiber and water reducing agent, adding the weighed materials into a mortar mixer, and stirring and mixing the materials to form premix;
(2) when the special fiber is the chopped fiber, the premix and the special fiber are mixed in a concrete mixer and then are subjected to injection construction by a mortar injection machine;
(3) when the special fiber contains continuous high-zirconium alkali-resistant glass fiber, the materials except the glass fiber are mixed by a stirrer, and then the glass fiber is mixed and sprayed with the mixture at the nozzle of the mortar spraying machine.
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| CN115124312A (en) * | 2022-05-22 | 2022-09-30 | 新特新材料集团(河南)股份有限公司 | Physical modification spraying type UHPC |
| CN115477515A (en) * | 2022-09-20 | 2022-12-16 | 迪亚爱柯新材料科技(江苏)有限公司 | Jet type ultrahigh-performance concrete slurry and preparation and jetting methods thereof |
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| 戚德海等: "高锆耐碱玻璃纤维的应用研究", 《玻璃纤维》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114907070A (en) * | 2022-05-11 | 2022-08-16 | 湖南人健宝固高新科技发展有限公司 | Non-shrinkage sprayable ultrahigh-performance concrete and construction method thereof |
| CN115124312A (en) * | 2022-05-22 | 2022-09-30 | 新特新材料集团(河南)股份有限公司 | Physical modification spraying type UHPC |
| CN115477515A (en) * | 2022-09-20 | 2022-12-16 | 迪亚爱柯新材料科技(江苏)有限公司 | Jet type ultrahigh-performance concrete slurry and preparation and jetting methods thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114075059B (en) | 2023-05-30 |
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