CN113149555A - Sprayed concrete for roadway - Google Patents
Sprayed concrete for roadway Download PDFInfo
- Publication number
- CN113149555A CN113149555A CN202110429102.5A CN202110429102A CN113149555A CN 113149555 A CN113149555 A CN 113149555A CN 202110429102 A CN202110429102 A CN 202110429102A CN 113149555 A CN113149555 A CN 113149555A
- Authority
- CN
- China
- Prior art keywords
- parts
- roadway
- concrete
- cement
- shotcrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011378 shotcrete Substances 0.000 title claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000004568 cement Substances 0.000 claims abstract description 14
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 9
- 239000004576 sand Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 7
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 7
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 5
- 239000003063 flame retardant Substances 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 16
- 238000009413 insulation Methods 0.000 abstract description 8
- 238000005336 cracking Methods 0.000 abstract description 7
- 230000035699 permeability Effects 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 230000035939 shock Effects 0.000 abstract description 6
- 229920000642 polymer Polymers 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 239000004567 concrete Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000620 organic polymer Polymers 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 125000001905 inorganic group Chemical group 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/30—Oxides other than silica
- C04B14/303—Alumina
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00008—Obtaining or using nanotechnology related materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides sprayed concrete for a roadway, which comprises the following raw materials in parts by weight: 80-120 parts of cement, 40-60 parts of superfine aggregate, 80-100 parts of fine sand, 10-20 parts of fiber, 6-12 parts of rubber powder, 7-10 parts of nano alumina, 3-8 parts of polyacrylamide, 8-14 parts of MK-1 reinforcing agent, 1.5-5 parts of water reducing agent, 6-10 parts of flame retardant and 10-18 parts of accelerator. The invention forms an inorganic-organic hybrid polymer dispersed group system by the principle of assembling, coating and dispersing inorganic-organic ultrafine powder, can achieve the excellent indexes of a guniting material such as moderate toughness and rigidity, high adhesion, cracking resistance, permeability resistance, reinforcing support and the like, and also has stronger toughness and ductility as well as heat insulation and shock absorption performances.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to sprayed concrete for a roadway.
Background
In order to ensure the smooth passage and safe production of the underground roadway, the underground roadway must be mined and supported, cement mortar and concrete are generally adopted to carry out guniting on the rock surface of the underground roadway, and after the cement mortar is solidified, the rock collapse is prevented, and underground water is prevented from permeating into the roadway. At present, a process technology for stirring cement guniting materials on site is adopted for opposite-opening mining roadways, cement, sand, stones and the like are transported to a mine, and the cement guniting materials are stirred on site in a dry mixing mode, and the method has the following three obvious defects: 1. the mixing is carried out on site, the proportion is not easy to control by operators, and the control strictness to the guniting quality is poor. 2. The field stirring needs to occupy the underground valuable roadway place, stacks cement and sand and stone materials, influences the roadway section and the transportation space, easily blocks the roadway and causes accident potential. 3. The dust of underground tunnel cement unloading, the dust of gravel and sand unloading, the dust of stirring material of loading have aggravated the environment that pollutes the mine tunnel, seriously influence staff's health.
The existing formulations of mortar and concrete for supporting the underground mine roadway cause the accidents of rock falling, local collapse, roadway water permeability and the like of the mine roadway due to unstable quality, and specifically comprise the following steps: 1. the guniting material has poor instantaneous adhesion performance, and is easy to rebound after being sprayed to the rock surface due to the rigidity of the guniting material, and the produced ground material exceeds 30, so that the serious waste of the guniting material is caused. 2. The guniting material cannot achieve toughness and rigidity when being assembled, and cannot simultaneously have the characteristics of high adhesion, cracking resistance, water resistance and the like. The thickness requirement of the reinforcing support is large, the time for the support function to be performed becomes slow, and the serious waste of the guniting material is caused. 3. The guniting material has high matched rigid component and brittleness, and after being cured, the guniting material vibrates along with geological movement of an underground roadway or blasting in mining and the like, so that hidden troubles such as collapse of supporting mortar are easily caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides the shotcrete for the roadway, which can achieve medium toughness and rigidity, has the flexibility of organic polymers, has excellent guniting material indexes such as high adhesion, cracking resistance, permeability resistance, reinforcing support and the like, and also has stronger toughness and ductility as well as heat insulation and shock absorption properties.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
the invention provides sprayed concrete for a roadway, which comprises the following raw materials in parts by weight: 80-120 parts of cement, 40-60 parts of superfine aggregate, 80-100 parts of fine sand, 10-20 parts of fiber, 6-12 parts of rubber powder, 7-10 parts of nano alumina, 3-8 parts of polyacrylamide, 8-14 parts of MK-1 reinforcing agent, 1.5-5 parts of water reducing agent, 0.5-1 part of flame retardant and 10-18 parts of accelerator.
Preferably, the rubber powder has a particle size of 40 meshes.
Preferably, the rubber powder has a particle size of 60 meshes.
Preferably, the cement is portland cement.
Preferably, the superfine aggregate is quartz powder.
Preferably, the superfine aggregate is slag micropowder.
Preferably, the accelerator is an 782 type accelerator.
The invention has the following beneficial effects:
the sprayed concrete for roadway is prepared by inorganic-organic hybrid polymer dispersed group system based on the principle of inorganic-organic superfine powder assembling, coating and dispersing system, and the inorganic-organic hybrid polymer dispersed group system has inorganic group medium rigidity and organic polymer flexibility. The invention can reach medium toughness rigidity, has excellent guniting material indexes of high adhesiveness, cracking resistance, permeability resistance, reinforced support and the like, and also has stronger toughness, ductility, heat insulation and shock absorption performance.
The polyacrylamide has obvious effects of improving the flexural strength, the bonding strength, the bending toughness and the abrasion resistance of concrete, and can reduce the folding ratio, the permeability and the contractibility. The rubber powder is added into the concrete, so that the brittleness of common concrete can be improved, the toughness, the ductility and the crack resistance of the concrete are improved, and the concrete has good heat insulation, sound insulation and shock absorption performances. The fibers are uniformly distributed in the concrete, so that shrinkage and cracking can be prevented, and the toughness of the concrete is enhanced. The nano alumina is doped into the concrete matrix, so that the mechanical property and the deformation performance of the concrete can be effectively improved. The function of the MK-1 high-efficiency reinforcing agent in the process of spraying concrete in a roadway and a spraying method. In the actual roadway support, after the sprayed concrete is added with the reinforcing agent, the compressive strength is improved by 40-50%, and the resilience rate can be reduced to 10.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following detailed description of the present invention is provided in connection with specific embodiments.
Example 1
The embodiment provides a sprayed concrete for a roadway, which comprises the following raw materials in parts by weight: 80 parts of cement, 40 parts of superfine aggregate, 80 parts of fine sand, 10 parts of fiber, 6 parts of rubber powder, 7 parts of nano-alumina, 3 parts of polyacrylamide, 8 parts of MK-1 reinforcing agent, 1.5 parts of water reducing agent, 0.5 part of flame retardant and 10 parts of accelerator.
The particle size of the rubber powder is 40 meshes. The cement is portland cement. The superfine aggregate is quartz powder. The superfine aggregate is slag micropowder. The accelerator is 782 type accelerator.
Example 2
The embodiment provides a sprayed concrete for a roadway, which comprises the following raw materials in parts by weight: 100 parts of cement, 60 parts of superfine aggregate, 100 parts of fine sand, 15 parts of fiber, 10 parts of rubber powder, 8 parts of nano-alumina, 6 parts of polyacrylamide, 10 parts of MK-1 reinforcing agent, 3 parts of water reducing agent, 0.5 part of flame retardant and 12 parts of accelerating agent.
The particle size of the rubber powder is 60 meshes. The cement is portland cement. The superfine aggregate is quartz powder. The superfine aggregate is slag micropowder. The accelerator is 782 type accelerator.
According to the GB-T50081-2002 standard for testing the mechanical properties of common concrete, the technical indexes of the shotcrete prepared in the example 1 and the example 2 are shown in the following table 1:
TABLE 1
The polyacrylamide has obvious effects of improving the flexural strength, the bonding strength, the bending toughness and the abrasion resistance of concrete, and can reduce the folding ratio, the permeability and the contractibility. The rubber powder is added into the concrete, so that the brittleness of common concrete can be improved, the toughness, the ductility and the crack resistance of the concrete are improved, and the concrete has good heat insulation, sound insulation and shock absorption performances. The fibers are uniformly distributed in the concrete, so that shrinkage and cracking can be prevented, and the toughness of the concrete is enhanced. The nano alumina is doped into the concrete matrix, so that the mechanical property and the deformation performance of the concrete can be effectively improved. The function of the MK-1 high-efficiency reinforcing agent in the process of spraying concrete in a roadway and a spraying method. In the actual roadway support, after the sprayed concrete is added with the reinforcing agent, the compressive strength is improved by 40-50%, and the resilience rate can be reduced to 10.
According to the technical scheme, the shotcrete for the roadway is formed by an inorganic-organic hybrid polymer dispersed group system according to the principles of inorganic-organic ultrafine powder assembling, coating and dispersing system, wherein the inorganic-organic hybrid polymer dispersed group system has medium rigidity of inorganic group and flexibility of organic polymer. The invention can reach medium toughness rigidity, has excellent guniting material indexes of high adhesiveness, cracking resistance, permeability resistance, reinforced support and the like, and also has stronger toughness, ductility, heat insulation and shock absorption performance.
The embodiments of the present invention have been described in detail through the embodiments, but the description is only exemplary of the embodiments of the present invention and should not be construed as limiting the scope of the embodiments of the present invention. The scope of protection of the embodiments of the invention is defined by the claims. In the present invention, the technical solutions described in the embodiments of the present invention or those skilled in the art, based on the teachings of the embodiments of the present invention, design similar technical solutions to achieve the above technical effects within the spirit and the protection scope of the embodiments of the present invention, or equivalent changes and modifications made to the application scope, etc., should still fall within the protection scope covered by the patent of the embodiments of the present invention.
Claims (7)
1. The sprayed concrete for the roadway is characterized by comprising the following raw materials in parts by weight: 80-120 parts of cement, 40-60 parts of superfine aggregate, 80-100 parts of fine sand, 10-20 parts of fiber, 6-12 parts of rubber powder, 7-10 parts of nano alumina, 3-8 parts of polyacrylamide, 8-14 parts of MK-1 reinforcing agent, 1.5-5 parts of water reducing agent, 0.5-1 part of flame retardant and 10-18 parts of accelerator.
2. The shotcrete for the roadway according to claim 1, wherein the rubber powder has a particle size of 40 mesh.
3. The shotcrete for the roadway according to claim 1, wherein the rubber powder has a particle size of 60 mesh.
4. Shotcrete for a roadway according to claim 1, wherein the cement is portland cement.
5. The shotcrete for the roadway according to claim 1, wherein the ultrafine aggregate is quartz powder.
6. The shotcrete for the roadway according to claim 1, wherein the ultrafine aggregate is fine slag powder.
7. The shotcrete for the roadway of claim 1, wherein the accelerator is an 782 type accelerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110429102.5A CN113149555A (en) | 2021-04-21 | 2021-04-21 | Sprayed concrete for roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110429102.5A CN113149555A (en) | 2021-04-21 | 2021-04-21 | Sprayed concrete for roadway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113149555A true CN113149555A (en) | 2021-07-23 |
Family
ID=76867528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110429102.5A Pending CN113149555A (en) | 2021-04-21 | 2021-04-21 | Sprayed concrete for roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113149555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113200688A (en) * | 2021-04-14 | 2021-08-03 | 河南省宜居建材科技有限公司 | Method for preparing cementing material based on comprehensive tailings |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000086319A (en) * | 1998-09-10 | 2000-03-28 | Denki Kagaku Kogyo Kk | Quick-setting sprayed cement concrete and spraying method using it |
| CN101633574A (en) * | 2009-05-31 | 2010-01-27 | 山西晋城无烟煤矿业集团有限责任公司 | Mining high durability light sprayed concrete |
| CN103664069A (en) * | 2013-08-30 | 2014-03-26 | 江南大学 | Injection-type fiber-reinforced cement-based composite material with high ductility |
| CN108358564A (en) * | 2018-05-11 | 2018-08-03 | 江南大学 | A kind of high ductility cement-base composite material and preparation method thereof |
| CN109503103A (en) * | 2018-12-17 | 2019-03-22 | 南京绿色增材智造研究院有限公司 | A kind of superhigh tenacity alkali-activated carbonatite gunite concrete and preparation method thereof |
| CN110510954A (en) * | 2019-09-20 | 2019-11-29 | 长安大学 | High-strength sprayed concrete for high-ground-temperature tunnel and preparation method thereof |
-
2021
- 2021-04-21 CN CN202110429102.5A patent/CN113149555A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000086319A (en) * | 1998-09-10 | 2000-03-28 | Denki Kagaku Kogyo Kk | Quick-setting sprayed cement concrete and spraying method using it |
| CN101633574A (en) * | 2009-05-31 | 2010-01-27 | 山西晋城无烟煤矿业集团有限责任公司 | Mining high durability light sprayed concrete |
| CN103664069A (en) * | 2013-08-30 | 2014-03-26 | 江南大学 | Injection-type fiber-reinforced cement-based composite material with high ductility |
| CN108358564A (en) * | 2018-05-11 | 2018-08-03 | 江南大学 | A kind of high ductility cement-base composite material and preparation method thereof |
| CN109503103A (en) * | 2018-12-17 | 2019-03-22 | 南京绿色增材智造研究院有限公司 | A kind of superhigh tenacity alkali-activated carbonatite gunite concrete and preparation method thereof |
| CN110510954A (en) * | 2019-09-20 | 2019-11-29 | 长安大学 | High-strength sprayed concrete for high-ground-temperature tunnel and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113200688A (en) * | 2021-04-14 | 2021-08-03 | 河南省宜居建材科技有限公司 | Method for preparing cementing material based on comprehensive tailings |
| CN113200688B (en) * | 2021-04-14 | 2023-07-18 | 河南省宜居建材科技有限公司 | Method for preparing cementing material based on comprehensive tailings |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20210723 |