CN114075059B - Ultra-high performance concrete composition capable of being used for spray construction - Google Patents
Ultra-high performance concrete composition capable of being used for spray construction Download PDFInfo
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- CN114075059B CN114075059B CN202010832620.7A CN202010832620A CN114075059B CN 114075059 B CN114075059 B CN 114075059B CN 202010832620 A CN202010832620 A CN 202010832620A CN 114075059 B CN114075059 B CN 114075059B
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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)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an ultra-high performance concrete composition capable of being used for spray construction. The concrete composition provided by the invention 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 clay mineral with a chain layered 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 two of chopped fiber or continuous high-zirconium alkali-resistant glass fiber which are mixed 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 provided by the invention has good fluidity and thixotropic property after spraying under the condition of ultra-low water-gel ratio, does not sag, can be suitable for construction of various spraying equipment, can be suitable for construction of vertical surfaces, top surfaces, curved surfaces and the like of a multi-material mold, can be used for preparing ultra-high performance concrete members or decorative products with complex shapes, and has wide application prospects.
Description
Technical Field
The invention relates to the field of concrete, in particular to an ultra-high performance concrete composition capable of being used for spray construction.
Background
The ultra-high performance concrete is suitable for manufacturing the exterior wall decorative plate due to the excellent mechanical property and durability, particularly the characteristics of bending resistance, low water absorption, high surface compactness, stain resistance and the like. The conventional pouring mode can only be used for preparing a planar decorative plate, and under the background of increasingly complicated, fine and large-sized modeling of the building exterior decorative plate, the inclined plane, the vertical plane, the hyperbolic or multi-curved surface and the three-dimensional decorative plate are required to be prepared, and the direct pouring mode is difficult to realize, so that development of a UHPC material system capable of being formed by injection is urgently required.
Patent CN201910627894.X discloses a spray-type ultra-high performance decorative concrete material and a preparation method thereof, but there are short plates with small grain size (large shrinkage), polymer emulsion (influence hydration, decrease strength) and excessive alkali-resistant glass fiber. Based on the above needs, the present invention provides an ultra-high performance concrete composition for spray construction.
Disclosure of Invention
In order to solve the problems of high difficulty in formwork supporting of non-planar ultra-high-performance concrete, low construction efficiency and the like, the invention mainly provides an sprayable ultra-high-performance concrete composition so as to meet the requirement of efficient preparation of a special-shaped structure.
The invention provides an ultra-high performance concrete composition capable of being subjected to spray construction, which is prepared from a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducer according to the mass ratio of 400-600:1.5-25:600-400:0.5-60:6-20 parts;
the composite cementing material comprises cement and an admixture, wherein the mass ratio of the cement to the admixture is 1:0.15 to 0.50, wherein the median particle size of the admixture is 5 to 30 microns;
the cement is selected from any one or more of silicate cement, ordinary silicate cement, white cement, sulphoaluminate cement and high aluminate cement; the admixture is selected from any two or more than two of ash silica fume, bai Guihui, fly ash, micro beads, superfine mineral powder, superfine calcium carbonate and metakaolin which are mixed in any proportion;
the thixotropic agent is clay mineral with a chain lamellar structure; the thixotropic agent is preferably attapulgite or montmorillonite;
the grading fine sand consists of the following three grain size grading fine sand in percentage by mass:
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 particle size of 70-120 meshes,
the sum of the mass percentages of the fine sand with the three grain size grading is 100 percent;
the grading fine sand is selected from any one of river sand, quartz sand and machine-made sand, and is preferably river sand or quartz sand;
the special fiber is any one or two of chopped fiber or continuous high-zirconium alkali-resistant glass fiber which are mixed in any proportion;
the diameter of the chopped fiber ranges from 0.10 mm to 0.35mm, and the length of the fiber ranges from 5.0 mm to 18.0mm; the chopped fibers are selected from chopped polypropylene fibers, chopped polyvinyl alcohol fibers and chopped polyoxymethylene fibers, wherein the chopped polypropylene fibers, the chopped polyvinyl alcohol fibers and the chopped polyoxymethylene fibers are mixed in a single specification or mixed in different specifications, and the different specifications of the more than one fibers comprise the same specification of different fibers or the same specification of different fibers;
the fineness of the continuous high-zirconium alkali-resistant glass fiber is 20000 to 30000 dtex;
the main functions of the synthetic chopped fiber or the continuous high-zirconium alkali-resistant glass fiber in the sprayable UHPC system are to improve cohesiveness, reduce rebound in the concrete spraying process and improve cracking resistance and toughening effect;
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 and the chopped fiber are added in a pre-mixing mode with the ultra-high performance concrete composition, and the continuous alkali-resistant glass fiber is cut off on line through a special spraying machine spray gun cutting machine.
The invention relates to an application method of an ultra-high performance concrete composition capable of being subjected to spray construction, which comprises the following steps:
(1) The method comprises the steps of metering raw materials including cement, admixture, thixotropic agent, graded fine sand, special fiber and water reducer, adding the metered raw materials into a mortar mixer, and stirring and mixing the metered raw materials to form premix;
(2) When the special fiber is chopped fiber, the premix and the special fiber are mixed in a concrete mixer and then sprayed and constructed by a mortar spraying machine;
(3) When the special fiber contains continuous high-zirconium alkali-resistant glass fiber, the glass fiber is mixed with the mixture at a spray head of a mortar spraying machine after materials except the glass fiber are mixed by a stirrer.
The spray-applied ultra-high performance concrete composition can be added with pigment or color paste according to target requirements to adjust the color and the shape of a final product, and the pigment is added according to actual requirements.
The invention has the following beneficial effects:
(1) 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 such as special-shaped, curved surfaces and the like, and enriches the types of products;
(2) When only the synthetic fiber reinforced UHPC is used for spraying, the UHPC is directly sprayed at one time, so that layered spraying is avoided, the surface layer of the contact surface of the UHPC and the die is not exposed, and the production efficiency is further improved;
(3) The ultra-high performance concrete composition with the sprayable construction has good fluidity and thixotropic property after spraying under the condition of ultra-low water-gel ratio, does not sag, can be suitable for construction of various spraying equipment, can be suitable for construction of vertical surfaces, top surfaces, curved surfaces and the like of a multi-material die, can be used for preparing ultra-high performance concrete members or decorative products with complex shapes, and has wide application prospects.
Detailed Description
The invention is further described below in conjunction with the detailed description. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention.
Comparative example 1
The ultra-high performance concrete composition capable of being subjected to spray construction comprises a composite cementing material, a thixotropic agent, graded fine sand and a water reducing agent in a mass ratio of 600:1.5:400:20, a step of; the composite cementing material is prepared by mixing 52.5 of common silicate of field, gray silica fume and superfine mineral powder according to the mass ratio of 8:1:1; the thixotropic agent is montmorillonite; the grading fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three sand is 10 percent to 30 percent to 60 percent; the water reducing agent is a polycarboxylate water reducing agent with water reducing rate of 45% produced by Jiangsu Su Bote new material Co., ltd.
Comparative example 2
The ultra-high performance concrete composition capable of being subjected to spray construction comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent in a mass ratio of 600:1.5:400:60:20, a step of; the composite cementing material is prepared by mixing 52.5 of common silicate of field, gray silica fume and superfine mineral powder according to the mass ratio of 8:1:1; the thixotropic agent is montmorillonite; the grading fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three sand is 10 percent to 30 percent to 60 percent; the special fiber is common glass fiber; the water reducing agent is a polycarboxylate water reducing agent with water reducing rate of 45% produced by Jiangsu Su Bote new material Co., ltd.
Example 1
The ultra-high performance concrete composition capable of being subjected to spray construction comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent in a mass ratio of 600:1.5:400:60:20, a step of; the composite cementing material is prepared by mixing 52.5 of common silicate of field, gray silica fume and superfine mineral powder according to the mass ratio of 8:1:1; the thixotropic agent is montmorillonite; the grading fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three sand is 10 percent to 30 percent to 60 percent; the special fiber is polyoxymethylene fiber with length of 12 mm and diameter of 0.2 mm; the water reducing agent is a polycarboxylate water reducing agent with water reducing rate of 45% produced by Jiangsu Su Bote new material Co., ltd.
Example 2
The ultra-high performance concrete composition capable of being subjected to spray construction comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent in a mass ratio of 500:5.0:500:10:18; the composite cementing material is prepared by mixing field silicate 52.5, white silica fume and microbeads according to the mass ratio of 7.5:2.0:0.5; the thixotropic agent is attapulgite; the grading fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three sand is 0 percent to 25 percent to 75 percent; the special fiber is prepared by mixing polyformaldehyde with the length of 12 mm and the diameter of 0.2 mm with polyvinyl alcohol fiber, and the mass ratio is 7:3, a step of; the water reducing agent is a polycarboxylate water reducing agent with the water reducing rate of 42% produced by Jiangsu Su Bote new material Co., ltd.
Example 3
The ultra-high performance concrete composition capable of being subjected to spray construction 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 formed by mixing field silicate 52.5, 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 grading fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three sand is 15 percent to 70 percent; the special fiber is a mixed use of a polyoxymethylene fiber with the length of 6 mm and the diameter of 0.2 mm, a polyvinyl alcohol fiber with the length of 18 mm and the diameter of 0.35mm and a 20000 dtex high-zirconium alkali-resistant glass fiber, and the mass ratio is 4:4:2; the water reducing agent is a polycarboxylate water reducing agent with water reducing rate of 40% produced by Jiangsu Su Bote new material Co., ltd.
Example 4
The ultra-high performance concrete composition capable of being subjected to spray construction comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio is 480:10:520:18:20, a step of; the composite cementing material is formed by mixing 52.5 of Abo-boria 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 grading fine sand is river sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three sand is 15 percent to 70 percent; the special fiber is a mixed use of a polyoxymethylene fiber with the length of 6 mm and the diameter of 0.2 mm, a polyvinyl alcohol fiber with the length of 12 mm and the diameter of 0.30 mm and a high-zirconium alkali-resistant glass fiber with the length of 30000 dtex, and the mass ratio is 3:3:4; the water reducing agent is a polycarboxylate water reducing agent with water reducing rate of 45% produced by Jiangsu Su Bote new material Co., ltd.
Example 5
The ultra-high performance concrete composition capable of being subjected to spray construction comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio is 480:10:520:18:20, a step of; the composite cementing material is prepared from white silver cement 52.5, sulphoaluminate cement, fly ash, bai Guihui and metakaolin according to the proportion of 8:0.5:1.0:0.3:0.20 mass ratio; the thixotropic agent is montmorillonite; the grading fine sand is machine-made sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three sand is 25 percent to 0 percent to 75 percent; the special fiber is prepared by mixing polyformaldehyde fiber with the length of 12 mm and the diameter of 0.30 mm with 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 polycarboxylate water reducing agent with water reducing rate of 40% produced by Jiangsu Su Bote new material Co., ltd.
Example 6
The ultra-high performance concrete composition capable of being subjected to spray construction comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent, wherein the mass ratio is 480:10:520:18:20, a step of; the composite cementing material is prepared from Abbe cement 52.5, high aluminate cement, superfine calcium carbonate, white silica fume and metakaolin according to the proportion of 8.5:0.3:0.4:0.3:0.5 mass ratio; the thixotropic agent is attapulgite; the grading fine sand is machine-made sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three sand is 0 percent to 100 percent; the special fiber is prepared by mixing polyoxymethylene fiber with the length of 12 mm and the diameter of 0.30 mm with 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 polycarboxylate water reducing agent with water reducing rate of 40% produced by Jiangsu Su Bote new material Co., ltd.
Example 7
The ultra-high performance concrete composition capable of being subjected to spray construction comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent in a mass ratio of 600:1.5:400:60:20, a step of; the composite cementing material is prepared by mixing 52.5 of common silicate of field, gray silica fume and superfine mineral powder according to the mass ratio of 8:1:1; the thixotropic agent is montmorillonite; the grading fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three sand is 10 percent to 30 percent to 60 percent; the special fiber is polyoxymethylene fiber with the length of 12 mm, 6 mm and the diameter of 0.2 mm, and the mass ratio is 1:1; the water reducing agent is a polycarboxylate water reducing agent with water reducing rate of 45% produced by Jiangsu Su Bote new material Co., ltd.
Example 8
The ultra-high performance concrete composition capable of being subjected to spray construction comprises a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent in a mass ratio of 600:1.5:400:60:20, a step of; the composite cementing material is prepared by mixing 52.5 of common silicate of field, gray silica fume and superfine mineral powder according to the mass ratio of 8:1:1; the thixotropic agent is montmorillonite; the grading fine sand is quartz sand with 20-40 meshes, 40-70 meshes and 70-120 meshes, and the mass percentage of the three sand is 10 percent to 30 percent to 60 percent; the special fiber is continuous high-zirconium alkali-resistant glass fiber; the water reducing agent is a polycarboxylate water reducing agent with water reducing rate of 45% produced by Jiangsu Su Bote new material Co., ltd.
The concrete compositions of each example and comparative example were molded by stirring after adding water, and then subjected to performance test, wherein the water-gel 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 of | 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 |
| Example 8 | 130.3 | 20.8 | 3.6 | Whether or not |
As can be seen from the data in Table 1, the ultra-high performance concrete composition with sprayable construction prepared by the embodiments of the invention has good fluidity and thixotropic property after spraying under the condition of ultra-low water-gel ratio, does not sag, can be suitable for construction of various spraying equipment, can be suitable for construction of vertical surfaces, top surfaces, curved surfaces and the like of a multi-material die, can prepare ultra-high performance concrete members or decorative products with complex shapes, and has wide application prospects. The concrete of examples has higher compressive and flexural strength and lower rebound than comparative examples 1 and 2.
Claims (7)
1. The ultra-high performance concrete composition capable of being sprayed for construction is characterized by comprising a composite cementing material, a thixotropic agent, graded fine sand, special fibers and a water reducing agent according to the mass ratio of 400-600:1.5-25:600-400:0.5-60:6-20 parts;
the composite cementing material comprises cement and an admixture, wherein the mass ratio of the cement to the admixture is 1:0.15 to 0.50, wherein the median particle size of the admixture is 5 to 30 microns;
the thixotropic agent is clay mineral with a chain lamellar structure;
the grading fine sand consists of the following three grain size grading fine sand in percentage by mass:
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 particle size of 70-120 meshes,
the sum of the mass percentages of the fine sand with the three grain size grading is 100 percent;
the grading fine sand is selected from any one of river sand, quartz sand and machine-made sand;
the special fiber is any one or two of chopped fiber or continuous high-zirconium alkali-resistant glass fiber which are mixed in any proportion; the diameter of the chopped fiber ranges from 0.10 mm to 0.35mm, and the length of the fiber ranges from 5.0 mm to 18.0mm;
the fineness of the continuous high-zirconium alkali-resistant glass fiber is 20000 to 30000 dtex;
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 ultra-high performance concrete composition for spray construction according to claim 1, wherein the cement is selected from any one or more of Portland cement, white cement, sulphoaluminate cement and high-aluminate cement.
3. The ultra-high performance concrete composition capable of being sprayed according to claim 1, wherein the admixture is selected from any two or more of ash silica fume, bai Guihui, fly ash, microbeads, superfine mineral powder, superfine calcium carbonate and metakaolin, and is mixed in any proportion.
4. The ultra-high performance concrete composition for spray application according to claim 1, wherein the thixotropic agent is attapulgite or montmorillonite.
5. The ultra-high performance concrete composition for spray construction according to claim 1, wherein the graded fine sand is selected from river sand and quartz sand.
6. The ultra-high performance concrete composition for spray construction according to 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 mixed in a different specification, wherein the different specifications of the chopped fibers include the same specification of the chopped fibers or different specifications of the chopped fibers.
7. A method of using the ultra-high performance concrete composition for spray application as claimed in any one of claims 1 to 6, comprising the steps of:
(1) The method comprises the steps of metering raw materials including cement, admixture, thixotropic agent, graded fine sand, special fiber and water reducer, adding the metered raw materials into a mortar mixer, and stirring and mixing the metered raw materials to form premix;
(2) When the special fiber is chopped fiber, the premix and the special fiber are mixed in a concrete mixer and then sprayed and constructed by a mortar spraying machine;
(3) When the special fiber contains continuous high-zirconium alkali-resistant glass fiber, the glass fiber is mixed with the mixture at a spray head of a mortar spraying machine after materials except the glass fiber are mixed by a stirrer.
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| 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 |
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| CN114075059A (en) | 2022-02-22 |
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