CN109437706A - A kind of gunite concrete and its preparation method and application - Google Patents
A kind of gunite concrete and its preparation method and application Download PDFInfo
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- CN109437706A CN109437706A CN201811609906.8A CN201811609906A CN109437706A CN 109437706 A CN109437706 A CN 109437706A CN 201811609906 A CN201811609906 A CN 201811609906A CN 109437706 A CN109437706 A CN 109437706A
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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
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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
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- 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 belongs to highway engineering field of material technology, more particularly, to a kind of gunite concrete and its preparation method and application.Gunite concrete in the present invention is mainly composed of the following parts by weight: 300-350 parts of cement, 60-100 parts of agstone, 740-780 parts of rubble, 945-980 parts of sand, 2-3 parts of water-reducing agent, 20-27 parts of accelerator, 0.08-0.13 parts of tackifier and 150-190 parts of water.The present invention is applied in gunite concrete using agstone as mineral admixture, is reduced cement consumption, is reduced concrete cracking risk.Add a small amount of water-reducing agent, reduce water consumption, binder total amount and accelerator volume, it is appropriate to increase sand coarse aggregate ratio, mix micro tackifier, using agstone as mineral admixture, using micro cellulose ether as the novel tackifier of gunite concrete, improve the working performance of gunite concrete, reduces the cost and rebound degree of agstone gunite concrete.
Description
Technical field
The present invention relates to highway engineering field of material technology, more particularly, to a kind of gunite concrete and preparation method thereof and
Using.
Background technique
Gunite concrete is the concrete using injection method construction.The advantages of shotcrete construction method is construction speed
Degree is fast, requires construction site environment (flatness, shape etc.) low, and gunite concrete is usually used in placing tunnel liner, wall, day
The protective layer of the lining and steel construction of the thin-wall constructions such as canopy or other structures.
The adhesion strength of gunite concrete in the prior art is lower and rebound degree is higher, causes gunite concrete material unrestrained
Take serious.
In consideration of it, the present invention is specifically proposed.
Summary of the invention
It is an object of the present invention to provide a kind of gunite concretes, to solve gunite concrete existing in the prior art
Adhesion strength is lower and rebound degree is higher, the problem for causing gunite concrete material waste serious.The present invention is with agstone
It is applied in gunite concrete as mineral admixture, reduces cement consumption, reduces concrete cracking risk.Control injection coagulation
Native water-cement ratio adds a small amount of water-reducing agent, reduces water consumption, binder total amount and accelerator volume, suitably increase sand coarse aggregate ratio, mixes micro-
Amount tackifier, using micro cellulose ether as the novel tackifier of gunite concrete, is changed using agstone as mineral admixture
The working performance of kind gunite concrete, reduces the cost and rebound degree of agstone gunite concrete.
It is a further object to provide the preparation method of gunite concrete as described above, this method is simply easy
Row, the gunite concrete obtained by this method can be effectively reduced the rebound degree of cost and gunite concrete.
It is a further object to provide gunite concretes as described above in tunnel, cavern, side slope and/or foundation pit
Application in engineering can be effectively reduced rebound degree, save the cost.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
A kind of gunite concrete, is mainly composed of the following parts by weight:
300-350 parts of cement, 60-100 parts of agstone, 740-780 parts of rubble, 945-980 parts of sand, 2-3 parts of water-reducing agent,
20-27 parts of accelerator, 0.08-0.13 parts of tackifier and 150-190 parts of water.
Preferably, the gunite concrete is mainly composed of the following parts by weight:
310-340 parts of cement, 70-85 parts of agstone, 750-770 parts of rubble, 950-970 parts of sand, water-reducing agent 2.2-2.8
Part, 22-26 parts of accelerator, 0.09-0.12 parts of tackifier and 160-180 parts of water.
Preferably, the fineness of the agstone is not more than 15%；
The methylene blue number of the agstone is not more than 1.4g/kg；
The fluidity ratio of the agstone is 100-200%；
The water content of the agstone is not more than 15%；
The content of calcium carbonate is not less than 75% in the agstone；
Radionuclide I in the agstoneRaContent is not more than 1%, IrContent is not more than 1%.
Preferably, the mesh number of the agstone is 150-170 mesh, preferably 150-160 mesh.
Preferably, the agstone is to be obtained by lime stone by broken and grinding；
Preferably, the shattering process uses jaw crusher；
Preferably, the grinding process is using high-pressure overhang roll milling machine.
Preferably, the water-reducing agent is selected from least one of polycarboxylate water-reducer, naphthalene water reducer and amino water-reducing agent,
Preferably polycarboxylate water-reducer；
Preferably, the accelerator is selected from least one of I type of Red Star, 7 II types, 782 types and 8604 types.
Preferably, the tackifier are cellulose ether, it is preferable that the cellulose ether is selected from methylcellulose, ethoxy
Methylcellulose, carboxymethyl cellulose, ethyl cellulose, benzylcellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose and
At least one of cyanethyl cellulose.
The preparation method of gunite concrete as described above, comprising the following steps:
Cement, agstone, rubble, sand, water-reducing agent, accelerator, tackifier and water are mixed, injection coagulation is obtained
Soil.
Preferably, the mixing time is 120-300s, preferably 150-200s.
Application of the gunite concrete in tunnel, cavern, side slope and/or Foundation Pit Construction as described above.
Compared with the prior art, the invention has the following beneficial effects:
(1) present invention is applied in gunite concrete using agstone as mineral admixture, is reduced cement consumption, is reduced
Concrete cracking risk.A small amount of water-reducing agent is added, water consumption, binder total amount and accelerator volume are reduced, suitably increase sand
Rate mixes micro tackifier, using agstone as mineral admixture, using micro cellulose ether as the novel increasing of gunite concrete
Glutinous agent, improves the working performance of gunite concrete, reduces the cost and rebound degree of agstone gunite concrete.Pass through each component
Cooperation effect, obtain more excellent performance of gunite concrete.
(2) preparation method is simple for the gunite concrete in the present invention, the gunite concrete obtained by this method
The rebound degree of cost and gunite concrete can be effectively reduced.It applies in tunnel, cavern, side slope and/or base pit engineering, can rise
To good effect.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
A kind of gunite concrete, is mainly composed of the following parts by weight:
300-350 parts of cement, 60-100 parts of agstone, 740-780 parts of rubble, 945-980 parts of sand, 2-3 parts of water-reducing agent,
20-27 parts of accelerator, 0.08-0.13 parts of tackifier and 150-190 parts of water.
The present invention is applied to agstone as mineral admixture in gunite concrete, reduces cement consumption, reduces and mix
Solidifying soil cracking risk.A small amount of water-reducing agent is added, water consumption, binder total amount and accelerator volume are reduced, suitably increase sand coarse aggregate ratio,
Micro tackifier is mixed, using agstone as mineral admixture, using micro cellulose ether as the novel increasing stick of gunite concrete
Agent improves the working performance of gunite concrete, reduces the cost and rebound degree of agstone gunite concrete.Pass through each component
Cooperation effect, obtains more excellent performance of gunite concrete.
The typical but non-limiting parts by weight of cement are, for example, 300 parts, 305 parts, 310 parts, 315 parts, 320 parts, 325
Part, 330 parts, 335 parts, 340 parts, 345 parts or 350 parts.
The typical but non-limiting parts by weight of agstone are, for example, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85
Part, 90 parts, 95 parts or 100 parts.
The typical but non-limiting parts by weight of rubble are, for example, 740 parts, 745 parts, 750 parts, 755 parts, 760 parts, 765
Part, 770 parts, 775 parts or 780 parts.
The typical but non-limiting parts by weight of sand are, for example, 945 parts, 950 parts, 955 parts, 960 parts, 965 parts, 970
Part, 975 parts or 980 parts.
The typical but non-limiting parts by weight of water-reducing agent are, for example, 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5
Part, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts or 3 parts.
The parts by weight of accelerator it is typical but non-limiting be, for example, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts,
26 parts or 27 parts.
The typical but non-limiting parts by weight of tackifier are, for example, 0.08 part, 0.09 part, 0.1 part, 0.11 part, 0.12
Part or 0.13 part.
The typical but non-limiting parts by weight of water are, for example, 150 parts, 155 parts, 160 parts, 165 parts, 170 parts, 175
Part, 180 parts, 185 parts, 190 parts or 195 parts.
Preferably, the gunite concrete is mainly composed of the following parts by weight:
310-340 parts of cement, 70-85 parts of agstone, 750-770 parts of rubble, 950-970 parts of sand, water-reducing agent 2.2-2.8
Part, 22-26 parts of accelerator, 0.09-0.12 parts of tackifier and 160-180 parts of water.
It is mixed by the more excellent injection of the available mechanical property of the parts by weight of further excellent each component and working performance
Solidifying soil.
Preferably, the fineness of the agstone is not more than 15%；
The methylene blue number of the agstone is not more than 1.4g/kg；
The fluidity ratio of the agstone is 100-200%；
The water content of the agstone is not more than 15%；
The content of calcium carbonate is not less than 75% in the agstone；
Radionuclide I in the agstoneRaContent is not more than 1%, IrContent is not more than 1%.
Preferably, the mesh number of the agstone is 150-170 mesh, preferably 150-160 mesh.
Table one is the performance indicator of each specifications and models agstone.
Each specifications and models agstone performance indicator of table one
Comprehensively consider in terms of balance agstone performance and production energy consumption two, formulates the fineness index of agstone, adopt
With the agstone that mesh number is not less than 150 mesh, the preferably agstone of 150-170 mesh, more preferably use mesh number for 150
Mesh, mineral admixture of the agstone that fineness is 4.5% as agstone concrete of the present invention, save the cost, and can
Obtain more excellent performance of highway engineering agstone concrete.
Preferably, the agstone is to be obtained by lime stone by broken and grinding；
Preferably, the shattering process uses jaw crusher；
The present invention selects the broken of the achievable bulk agstone of jaw crusher, and reduction ratio is big, broken lime
Penicillium toxin is uniform.
Preferably, the grinding process is using high-pressure overhang roll milling machine.
Agstone should be stored individually, and should prevent from making moist and by other impurity pollutions such as dust.Mixing plant can be used
Silo store agstone, favorably feed intake with it is moisture-proof.
Preferably, the water-reducing agent is selected from least one of polycarboxylate water-reducer, naphthalene water reducer and amino water-reducing agent,
Preferably polycarboxylate water-reducer；
Water-reducing agent is one kind under conditions of maintaining concrete slump constant, outside the concrete that can be reduced mixing water amount
Add agent.Concrete mixing is added using at least one of polycarboxylate water-reducer, naphthalene water reducer and amino water-reducing agent in the present invention
There is preferable peptizaiton to cement granules after object, its working performance can be improved, reduce unit consumption of water, improves concrete mixing
The mobility of object, or unit cement consumption is reduced, save cement.
Preferably, the accelerator is selected from least one of I type of Red Star, 7 II types, 782 types and 8604 types.
The present invention selects at least one of I type of Red Star, 7 II types, 782 types and 8604 types to be used as accelerator, accelerates cement
Hydration and hardening, form enough intensity, in a short period of time to guarantee the requirement of special construction.
Preferably, the tackifier are cellulose ether, it is preferable that the cellulose ether is selected from methylcellulose, ethoxy
Methylcellulose, carboxymethyl cellulose, ethyl cellulose, benzylcellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose and
At least one of cyanethyl cellulose.
Cellulose ether is the high-molecular compound made of cellulose with ether structure.Cellulose is a kind of both not dissolve
Also the polyhydroxy high-molecular compound not melted, can then be dissolved in water, dilute alkaline soln and organic solvent, and have after cellulose is etherified
There is thermoplasticity.The present invention selects cellulose ether as tackifier, and cooperates cement, agstone, sand, rubble, water-reducing agent, rapid hardening
Under the collective effect of agent, the lower gunite concrete of rebound degree is obtained.
The preparation method of gunite concrete as described above, comprising the following steps:
Cement, agstone, rubble, sand, water-reducing agent, accelerator, tackifier and water are mixed, injection coagulation is obtained
Soil.
Tunnel and huge underground cavity concrete spraying support, the construction of Ying Caiyong wet-mixing gunite.Small-sized cavern and open-air work
Dry mixing method (half wet process) the gunite construction of water content ratio of aggregate 5%~6% can be used in concrete spraying support.
Preferably, the mixing time is 120-300s, preferably 150-200s.
Mixing time it is typical but non-limiting be, for example, 120s, 130s, 140s, 150s, 160s, 170s, 180s,
190s, 200s, 250s or 300s.
Application of the gunite concrete in tunnel, cavern, side slope and/or Foundation Pit Construction as described above.Lime stone
The design strength grade of powder gunite concrete is not lower than C20；When for engineering support under huge underground cavity and specific condition,
Design strength grade not preferably less than C25.
Below with reference to specific embodiment and comparative example, the present invention will be further described.
Embodiment 1
A kind of gunite concrete, every cubic metre is mainly grouped as by the group of following weight:
Cement 320kg, agstone 80kg, rubble 759kg, sand 965kg, polycarboxylate water-reducer 2.4kg, Red Star I type speed
Solidifying agent 24kg, methylcellulose 0.1kg and water 176kg.
Wherein, the mesh number of agstone is 150 mesh, fineness 4.5%；
The sand coarse aggregate ratio of highway engineering agstone concrete is 56%；
The water-cement ratio of highway engineering agstone concrete is 0.44；
The preparation method of the gunite concrete, comprising the following steps:
Preparation mesh number is 150 mesh, the agstone that fineness is 4.5%, by cement, agstone, rubble, sand, polycarboxylic acids
It is mixed to obtain injection by water-reducing agent, I type accelerator of Red Star, methylcellulose and water the mixing 150s in two shaft pugmill mixer
Solidifying soil.
Embodiment 2
A kind of gunite concrete, every cubic metre is mainly grouped as by the group of following weight:
Cement 310kg, agstone 85kg, rubble 750kg, sand 970kg, polycarboxylate water-reducer 2.2kg, 782 type rapid hardenings
Agent 22kg, ethyl cellulose 0.09kg and water 180kg；
Wherein, the mesh number of agstone is 150 mesh, fineness 4.5%；
The preparation method of the gunite concrete, comprising the following steps:
Preparation mesh number is 150 mesh, the agstone that fineness is 4.5%, by cement, agstone, rubble, sand, polycarboxylic acids
Water-reducing agent, 782 type accelerators, ethyl cellulose and water the mixing 130s in two shaft pugmill mixer obtain injection coagulation
Soil.
Embodiment 3
A kind of gunite concrete, every cubic metre is mainly grouped as by the group of following weight:
Cement 340kg, agstone 70kg, rubble 770kg, sand 950kg, polycarboxylate water-reducer 2.8kg, 8604 type rapid hardenings
Agent 26kg, carboxymethyl cellulose 0.12kg and water 160kg；
Wherein, the mesh number of agstone is 150 mesh, fineness 4.5%；
The preparation method of the gunite concrete, comprising the following steps:
Preparation mesh number is 150 mesh, the agstone that fineness is 4.5%, by cement, agstone, rubble, sand, polycarboxylic acids
It is mixed to obtain injection by water-reducing agent, 8604 type accelerators, carboxymethyl cellulose and water the mixing 160s in two shaft pugmill mixer
Solidifying soil.
Embodiment 4
A kind of gunite concrete, every cubic metre is mainly grouped as by the group of following weight:
Cement 300kg, agstone 100kg, rubble 780kg, sand 945kg, polycarboxylate water-reducer 3kg, 782 type accelerators
27kg, hydroxyethyl cellulose 0.13kg and water 150kg；
Wherein, the mesh number of agstone is 150 mesh, fineness 4.5%；
The preparation method of the gunite concrete, comprising the following steps:
Preparation mesh number is 150 mesh, the agstone that fineness is 4.5%, by cement, agstone, rubble, sand, polycarboxylic acids
It is mixed to obtain injection by water-reducing agent, 782 type accelerators, hydroxyethyl cellulose and water the mixing 120s in two shaft pugmill mixer
Solidifying soil.
Embodiment 5
A kind of gunite concrete, every cubic metre is mainly grouped as by the group of following weight:
Cement 350kg, agstone 60kg, rubble 740kg, sand 980kg, polycarboxylate water-reducer 2kg, 782 type accelerators
20kg, benzylcellulose 0.08kg and water 190kg；
Wherein, the mesh number of agstone is 150 mesh, fineness 4.5%；
The preparation method of the gunite concrete, comprising the following steps:
Preparation mesh number is 150 mesh, the agstone that fineness is 4.5%, by cement, agstone, rubble, sand, polycarboxylic acids
Water-reducing agent, 782 type accelerators, benzylcellulose and water the mixing 300s in two shaft pugmill mixer obtain injection coagulation
Soil.
Comparative example 1
A kind of conventional spray concrete, every cubic metre is mainly grouped as by the group of following weight:
Cement 446kg, rubble 739kg, sand 900kg, water-reducing agent 3.75kg, accelerator 31.22kg and water 178kg；
Wherein, the sand coarse aggregate ratio of highway engineering agstone concrete is 55%；
The water-cement ratio of highway engineering agstone concrete is 0.4.
Comparative example 2
A kind of gunite concrete, except agstone uses mesh number for 130 mesh, fineness is other operating procedures other than 20%
It is same as Example 1.
Test example
Gunite concrete in embodiment and comparative example is subjected to working performance and Mechanics Performance Testing, and carries out cost core
Calculate comparison.Table two is gunite concrete working performance test result；Table three is gunite concrete mechanical experimental results；Table four
For gunite concrete cost accounting comparative situation.
The working performance test result of two gunite concrete of table
The mechanical experimental results of three gunite concrete of table
The cost accounting comparative situation of table four embodiments 1 and comparative example 1
By table two and table three it is found that the present invention uses agstone as New Mineral admixture, made using cellulose ether
For tackifier, cooperate under cement, sand, rubble, accelerator and the collective effect of buck agent, obtained gunite concrete workability compared with
Well, slump and compression strength meet the job requirement of gunite concrete.The water resistant of gunite concrete permeates grade in the present invention
Up to S12, rebound degree 10.5-11.6%；Conventional spray agent on crack resistance of concrete water penetration grade in comparative example 1 reaches S8, and rebound degree is
19.5%.
As shown in Table 4, the gunite concrete in the present invention is than the conventional spray coagulation local prescription cost in comparative example 1
Reduce by 14%.The present invention as New Mineral admixture and uses cellulose ether as tackifier using agstone, is applied to
In gunite concrete, reduction construction cost can reach, economize on resources, energy-saving and environment-friendly purpose.
The mesh number of the agstone in gunite concrete in comparative example 2 obtains not within scope of protection of the present invention
To concrete in working performance and mechanical property not as good as implement 1 in gunite concrete performance it is good.It follows that stone
The mesh number of limestone flour could obtain more excellent performance of gunite concrete within scope of protection of the present invention.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of gunite concrete, which is characterized in that be mainly composed of the following parts by weight:
300-350 parts of cement, 60-100 parts of agstone, 740-780 parts of rubble, 945-980 parts of sand, 2-3 parts of water-reducing agent, rapid hardening
20-27 parts of agent, 0.08-0.13 parts of tackifier and 150-190 parts of water.
2. gunite concrete according to claim 1, which is characterized in that the gunite concrete is mainly by following parts by weight
Several groups are grouped as:
310-340 parts of cement, 70-85 parts of agstone, 750-770 parts of rubble, 950-970 parts of sand, 2.2-2.8 parts of water-reducing agent,
22-26 parts of accelerator, 0.09-0.12 parts of tackifier and 160-180 parts of water.
3. gunite concrete according to claim 1 or 2, which is characterized in that the fineness of the agstone is not more than
15%；
And/or；
The methylene blue number of the agstone is not more than 1.4g/kg；
And/or；
The fluidity ratio of the agstone is 100-200%；
And/or；
The water content of the agstone is not more than 15%；
And/or；
The content of calcium carbonate is not less than 75% in the agstone；
And/or；
Radionuclide I in the agstoneRaContent is not more than 1%, IrContent is not more than 1%.
4. gunite concrete according to claim 3, which is characterized in that the mesh number of the agstone is 150-170 mesh,
Preferably 150-160 mesh.
5. gunite concrete according to claim 1 or 2, which is characterized in that the agstone is passed through by lime stone
What broken and grinding obtained；
Preferably, the shattering process uses jaw crusher；
Preferably, the grinding process is using high-pressure overhang roll milling machine.
6. gunite concrete according to claim 1 or 2, which is characterized in that the water-reducing agent be selected from polycarboxylate water-reducer,
At least one of naphthalene water reducer and amino water-reducing agent, preferably polycarboxylate water-reducer；
Preferably, the accelerator is selected from least one of I type of Red Star, 7 II types, 782 types and 8604 types.
7. gunite concrete according to claim 1 or 2, which is characterized in that the tackifier are cellulose ether, preferably
Ground, it is fine that the cellulose ether is selected from methylcellulose, hydroxyethylmethylcellulose, carboxymethyl cellulose, ethyl cellulose, benzyl
Tie up at least one of element, hydroxyethyl cellulose, hydroxypropyl methyl cellulose and cyanethyl cellulose.
8. such as the preparation method of gunite concrete according to claim 1-7, which is characterized in that including following step
It is rapid:
Cement, agstone, rubble, sand, water-reducing agent, accelerator, tackifier and water are mixed, gunite concrete is obtained.
9. the preparation method of gunite concrete according to claim 8, which is characterized in that the mixing time is 120-
300s, preferably 150-200s.
10. if the described in any item gunite concretes of claim 1-7 are in tunnel, cavern, side slope and/or Foundation Pit Construction
Application.
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| CN112125570A (en) * | 2020-08-28 | 2020-12-25 | 赵源 | Admixture for shotcrete and preparation method and application thereof |
| CN112408912A (en) * | 2020-11-20 | 2021-02-26 | 中铁二十局集团有限公司 | Low-cost sprayed concrete and preparation method thereof |
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| CN113149544A (en) * | 2021-03-13 | 2021-07-23 | 祎禾科技有限公司 | Low-brittleness high-curing high-performance concrete spray slurry for coal mine tunnel and preparation method thereof |
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| CN115180883A (en) * | 2022-06-23 | 2022-10-14 | 中建五局土木工程有限公司 | Sprayed concrete and preparation method thereof |
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| CN110526652A (en) * | 2019-09-29 | 2019-12-03 | 鞍钢房产建设有限公司 | A kind of premixing wet shot reinforces gunite concrete and its construction method |
| CN110627446B (en) * | 2019-10-18 | 2022-04-26 | 保利长大工程有限公司 | Economical and environment-friendly tunnel shotcrete and construction process |
| CN112125570A (en) * | 2020-08-28 | 2020-12-25 | 赵源 | Admixture for shotcrete and preparation method and application thereof |
| CN112408912A (en) * | 2020-11-20 | 2021-02-26 | 中铁二十局集团有限公司 | Low-cost sprayed concrete and preparation method thereof |
| CN112661465A (en) * | 2021-01-27 | 2021-04-16 | 中铁岩锋成都科技有限公司 | Environment-friendly sprayed concrete slurry, environment-friendly sprayed concrete and construction method thereof |
| CN113149544A (en) * | 2021-03-13 | 2021-07-23 | 祎禾科技有限公司 | Low-brittleness high-curing high-performance concrete spray slurry for coal mine tunnel and preparation method thereof |
| CN115180883A (en) * | 2022-06-23 | 2022-10-14 | 中建五局土木工程有限公司 | Sprayed concrete and preparation method thereof |
| CN115180883B (en) * | 2022-06-23 | 2023-10-31 | 中建五局土木工程有限公司 | Sprayed concrete and preparation method thereof |
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| CN115490480B (en) * | 2022-09-27 | 2023-09-05 | 北京国道通公路设计研究院股份有限公司 | Low-resilience sprayed concrete containing biological viscose and preparation and application methods thereof |
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