CN109734381A - A kind of injection hole dreg concrete and preparation method thereof - Google Patents
A kind of injection hole dreg concrete and preparation method thereof Download PDFInfo
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of injection hole dreg concrete and preparation method thereof, the hole slag gunite concrete proportion is as follows: cement 339.5-425 kg/m3, water 170-195kg/m3,145.5 kg/m3 of modified component, diminishing component 4-4.85kg/m3, anti-24.25 kg/m3 of mud component, fine aggregate 770-890.5 kg/m3, coarse aggregate 770-890.5kg/m3, alkali-free liquid accelerator 30-38.8 kg/m3.Gunite concrete of the present invention replaces natural river sand using Tunnel slag Machine-made Sand, and is modified processing to it with microballon, so that gunite concrete meets the requirement of working performance and physical and mechanical property.Its 28d compression strength is in 50MPa or so, and under the conditions of ± 10 mm slump of 200 mm, mobility, water-retaining property is preferable, is not in plugging or from wash rice phenomenon during pumping or sprayed construction；The microsphere modified effect of altered contents used in the present invention simultaneously is obvious, and modified pneumatically placed concrete workability and workability are more preferable, it is easier to which pumping and sprayed construction are more conducive to meet the engine request of gunite concrete.
Description
Technical field
The invention belongs to underground space support material technical field, in particular to a kind of injection hole dreg concrete and its preparation
Method.
Background technique
Gunite concrete is by spraying machinery, using compressed air or other power, by cement, sand, stone, blending
What the raw material such as material, additive and water were worked good by a certain percentage mixes and stirs material, is sprayed by pipeline, and to be ejected at a high speed
A kind of concrete made of condensation hardening on face, it is grown up by shotcrete.The U.S. in 1914 in mine and
Shotcrete has been used in civil engineering first；The rice for the Austrian caprone water-power plant that 1948~nineteen fifty-three builds
You have used concrete spraying support by tunnel earliest, this " New Austrian Tunneling Method " for namely being accepted later by engineering circles personage is theoretical.
Countries in the world use concrete-spraying technology in civil construction and hydraulic engineering in succession.In the liner supporting of some large area
In Structural Engineering, bolt-spary supports and concrete spraying support have unrivaled superior compared with traditional support form
Property, to by backing have the function of branch lining, fill town, isolation, conversion, on the one hand saved steel and timber, reduced and be constructed into
This；On the other hand make construction is simple, work safety alleviates bulky manual labor, is conducive to simultaneous drifting and accelerates pick
Into speed.
With the development and progress of society, in order to which the high efficiency for meeting people is gone on a journey, the especially unbroken Yun Guishan of mountain shape
Area, it is essential for excavating various vehicular tunnels.In tunnel excavation, is combined and formed with anchor pole by gunite concrete
Shotcrete system played important function in underground space supporting, it can reduce country rock relaxation, play country rock from steady energy
Power improves the timeliness and stability of supporting.For gunite concrete, sand is its essential aggregate, with reform
Open deep development, China's infrastructure increasingly grow prosperity, and many areas in China natural sand resource occur and gradually reduce, especially
Yunnan-Guizhou border for being originally natural sand scarcity is even more the case where can using without sand occur.Under the driving of economic interests, much
Area occur unrest adopt disorderly dig natural sand the case where, especially a few years ago, ruin field dig sand, destroys the case where river is dug sand compare all
It is not only to destroy limited arable land, flood control dam, strong influence also is produced to ecological environment.And Machine-made Sand is by machinery
It is crushed, is sieved into, rock, mill tailings or the industrial residue particle that partial size is met the requirements, especially tunneling process
The hole slag of middle generation stacks land occupation, and outward transport is inconvenient, and processing is more difficult.In order to sufficiently solve this difficulty, by its graded crushing
Coarse-fine aggregate is made, realizes resource reutilization, not only economy, but also environmental protection is sustainable, is truly realized double benefit effects.But make
For the hole slag Machine-made Sand of fine aggregate, grain shape irregular, unlike natural sand is spheroid shape, but at sharp-featured four sides
Body and laminated structure, and content of stone powder and the remote superstate standard of cement content, cause the working performance of concrete and mechanical property big
Width decline, sprays very difficult.
Summary of the invention
To solve the above problems, making full use of powder the invention discloses a kind of injection hole dreg concrete and preparation method thereof
The superior function of fly ash micro-bead reaches the modification to hole slag gunite concrete and the resource reutilization of hole slag.28d compression strength exists
50MPa or so, under the conditions of ± 10 mm slump of 200 mm, mobility, water-retaining property is preferable, in pumping or sprayed construction process
In be not in plugging or from wash rice phenomenon；The microsphere modified effect of altered contents used in the present invention simultaneously is obvious, modified injection
Concrete workability and workability are more preferable, it is easier to which pumping and sprayed construction are more conducive to meet the engine request of gunite concrete.
In order to achieve the above objectives, technical scheme is as follows:
A kind of injection hole dreg concrete, each group distribution ratio are as follows: cement 339.5-425 kg/m3, water 170-195kg/m3, modification
145.5 kg/m3 of component, diminishing component 4-4.85kg/m3, anti-24.25 kg/m3 of mud component, fine aggregate 770-890.5 kg/m3
(partial size is less than 4.8mm), coarse aggregate 770-890.5kg/m3(partial size are less than 5-10mm), alkali-free liquid accelerator 30-38.8
kg/m³。
In a kind of injection hole dreg concrete of the present invention, fine aggregate is hole slag Machine-made Sand, derives from tunnel excavation mistake
Hole slag in journey, which is crushed, to be made, and particle size range is≤5mm, and the incorporation of hole slag Machine-made Sand is 770- in every cube of concrete material
890.5 kg。
In a kind of injection hole dreg concrete of the present invention, hole slag Machine-made Sand derives from tunnel excavation, gathers materials on the spot,
It is from a wealth of sources, resource reutilization, economical and efficient, save the cost.
In a kind of injection hole dreg concrete of the present invention, hole slag Machine-made Sand, shape mostly structure in the form of sheets, water content
Greatly, content of stone powder is exceeded, and cement content is larger, reduces water content using natural drying, selection by winnowing reduces content of stone powder, anti-mud component drop
Low cement content influences.
In a kind of injection hole dreg concrete of the present invention, the anti-mud component is in a liquid state, by aminobenzenesulfonic acid, anhydrous
Ethyl alcohol, phenol, formaldehyde mix composition in proportion.Aminobenzenesulfonic acid and dehydrated alcohol are mixed by 1:5 first, be warming up to 50 DEG C ±
2, then phenol and formaldehyde are added in mixed liquor, the ratio aminobenzenesulfonic acid of final mixed liquor: dehydrated alcohol: phenol: formaldehyde
For 1:5:3:10, heats up 100 DEG C ± 2 and constant temperature 3-7 h and form.
In a kind of injection hole dreg concrete of the present invention, the modified component is preferred fly ash micro-sphere, preferred powder
The specific surface area of fly ash micro-bead is 420-450 m2/ kg, the incorporation of microballon is 145.5 kg in every cube of concrete material.
In a kind of injection hole dreg concrete of the present invention, the diminishing group is divided into polycarboxylic acid water reducing agent, admittedly contain
Measuring is 20%-50%, water-reducing rate 10%-40%, and the incorporation of water-reducing agent is 4-4.85 kg in every cube of concrete material.
In a kind of injection hole dreg concrete of the present invention, the 28d compressive strength rate of the alkali-free liquid accelerator is big
Incorporation is 30-38.8kg in 120%, every cube of concrete material.
In a kind of injection hole dreg concrete of the present invention, the cement is portland cement, the specific surface area of cement
For 300-400m2/ kg, the incorporation of cement is 339.5-425kg in every cube of concrete material.
In a kind of injection hole dreg concrete of the present invention, the stone is the good stone of gradation, the partial size of stone
Range is 5-10mm, and the incorporation of stone is 770-890.5 kg in every cube of concrete material.
A kind of injection hole dreg concrete preparation method of the present invention, includes the following steps:
1) first hole slag Machine-made Sand natural drying to saturation plane is done, then selection by winnowing reduces content of stone powder, beats agglomerate block part；
2) hole slag Machine-made Sand is crossed into 4.75mm sieve again, screens out the block greater than 4.75mm and agglomerate part；
3) forced mixer, 1 min of dry mixing then is added in coarse aggregate, hole slag Machine-made Sand, cement and fly ash micro-sphere；
4) again by diminishing component, anti-mud component and water uniform mixing；
5) mixing water mixed through step 4) is added into agitated kettle, continues to stir 3 min, microsphere modified high-performance hole slag is made
Gunite concrete mixture；
6) will be through above-mentioned steps 1) -5) preparation gunite concrete mixture and alkali-free liquid accelerator in proportion, pass through coagulation
Native spraying machine injection mixing, is made a kind of injection hole dreg concrete.
The beneficial effects of the present invention are:
1, it using the broken obtained Machine-made Sand of hole slag, thoroughly solves the problems, such as Solid state fermentation, realizes the recycling of resource, simultaneously
Transportation cost and resource are saved.Not only demand of the engineering to sand aggregate had been met, but also has realized economic and environment-friendly sustainable development.
2, the working performance and physical and mechanical property that hole slag gunite concrete is improved using microsphere modified component, ensure that
Concrete is not in plugging or from wash rice phenomenon in pumping or course of injection；Hole slag gunite concrete mobility and water-retaining property compared with
The reason of difference is that hole slag is in sharp-featured polyhedron and laminated structure in broken rear Machine-made Sand obtained more, is incorporated into coagulation
It will not be easy to roll as natural sand in soil, so causing concrete flowability and water-retaining property poor.Fly ash micro-sphere is ball
Type is incorporated into hole dreg concrete and plays rolling action later, improves the mobility and water-retaining property of hole slag gunite concrete.Simultaneously
The incorporation of fly ash micro-sphere can reduce water-cement ratio, improve the intensity of hole slag gunite concrete.
3, using anti-mud component improve hole slag Machine-made Sand clay content it is larger caused by workability difference situation, hole slag is in broken system
Clod doping is had when obtaining Machine-made Sand, so causing hole slag Machine-made Sand clay content higher, clay content is to hole slag gunite concrete shadow
Sound is larger, adjusted using the anti-mud mixed liquor of polycarboxylic acids, can substantially reduce the water requirement of hole slag gunite concrete, change
It is apt to its working performance, improves its intensity.
Detailed description of the invention
Fig. 1 is that a kind of hole slag of the present invention replaces natural sand gunite concrete stirring internal structure change schematic diagram.
Fig. 2 is that stirring internal structure change is illustrated after modified component is added in a kind of hole slag gunite concrete of the present invention
Figure.
Fig. 3 is a kind of hole slag gunite concrete of the present invention rear practical stirring material object schematic diagram before modified.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.
Comparative example 1
The composition ratio of material is as shown in table 1.
Table 1 does not mix the benchmark match ratio (kg/m3) of microballon and anti-mud component natural sand gunite concrete
| Cement | Microballon | Sand | Stone | Water | Water-reducing agent | Anti- mud component | Accelerator |
| 485.0 | 0 | 890.5 | 890.5 | 195.0 | 4.85 | 0 | 38.8 |
The water-cement ratio of the gunite concrete is 0.40, sand coarse aggregate ratio 50%, and used cement is P II 42.5, and sand is fineness mould
The natural sand that number is 3.0, stone are the rubble of 5mm~10mm, and water-reducing agent is the high performance water reducing agent of polyocarboxy acid of water-reducing rate 20%,
Alkali-free liquid accelerator 28d compressive strength rate is 100%.This embodiment uses natural sand, and does not add hole slag and other groups
Point, as the match ratio of hole slag gunite concrete control group, as a comparison case 1.
Comparative example 2
The composition ratio of material is as shown in table 2.
Table 2 does not mix the benchmark match ratio (kg/m3) of microballon and anti-mud component hole slag gunite concrete
| Cement | Microballon | Sand | Stone | Water | Water-reducing agent | Anti- mud component | Accelerator |
| 485.0 | 0 | 890.5 | 890.5 | 195.0 | 4.85 | 0 | 38.8 |
The water-cement ratio of the injection hole dreg concrete is 0.40, and sand coarse aggregate ratio 50%, used cement is P II 42.5, and sand is stone
Machine-made Sand obtained by limestone cave ground-slag is broken, stone are the rubble of 5mm~10mm, and water-reducing agent is the high property of polycarboxylic acids of water-reducing rate 20%
Energy water-reducing agent, alkali-free liquid accelerator 28d compressive strength rate are 100%.This embodiment replaces natural sand using hole slag Machine-made Sand,
And modified group microballon and anti-mud component are not added, and as benchmark match ratio, as a comparison case 2.
Embodiment 3
The composition ratio of material is as shown in table 3.
Table 3 mixes the microsphere modified hole slag gunite concrete match ratio (kg/m of microballon (the 30% of cementitious material) and anti-mud component
3)
| Cement | Microballon | Sand | Stone | Water | Water-reducing agent | Anti- mud component | Accelerator |
| 339.5 | 145.5 | 890.5 | 890.5 | 195.0 | 4.85 | 24.25 | 38.8 |
The water-cement ratio of the injection hole dreg concrete is 0.40, and sand coarse aggregate ratio 50%, used cement is P II 42.5, and microballon is
The preferred high-active flyash (volume is the 30% of cementitious material) of Nanjing coal fired thermal power plant production, sand is karst cave ground-slag
Machine-made Sand obtained by broken, stone are the rubble of 5mm-10mm, and water-reducing agent is the high performance water reducing agent of polyocarboxy acid of water-reducing rate 20%, nothing
Alkali liquid quick-setting agent 28d compressive strength rate is 100%.Anti- mud component is in a liquid state, by aminobenzenesulfonic acid, dehydrated alcohol, phenol, first
Aldehyde mixes composition in proportion.Aminobenzenesulfonic acid and dehydrated alcohol are mixed by 1:5 first, 50 DEG C ± 2 are warming up to, then by phenol
Be added in mixed liquor with formaldehyde, the ratio aminobenzenesulfonic acid of final mixed liquor: dehydrated alcohol: phenol: formaldehyde 1:5:3:10 rises
Warm 100 DEG C ± 2 and 3 ~ 7 h of constant temperature form.Microballon (volume is the 30% of cementitious material) and anti-mud component have been added simultaneously,
Preparation method is:
1) first hole slag Machine-made Sand natural drying to saturation plane is done, then selection by winnowing reduces content of stone powder, beats agglomerate block part；
2) hole slag Machine-made Sand is crossed into 4.75mm sieve again, screens out the block greater than 4.75mm and agglomerate part；
3) forced mixer, 1 min of dry mixing then is added in coarse aggregate, hole slag Machine-made Sand, cement and fly ash micro-sphere；
4) again by diminishing component, anti-mud component and water uniform mixing；
5) mixing water mixed through step 4) is added into agitated kettle, continues to stir 3 min, microsphere modified high-performance hole slag is made
Gunite concrete mixture；
6) will be through above-mentioned steps 1) -5) preparation gunite concrete mixture and alkali-free liquid accelerator in proportion, pass through coagulation
Native spraying machine injection mixing, is made the present embodiment product, as embodiment 3.
1 ~ embodiment of comparative example 3 tests the slump of concrete, divergence simultaneously, be inverted slump cylinder emptying time and
28d compression strength.
The slump of concrete, divergence, be inverted slump cylinder emptying time concrete mix as research object,
According to " Standard for test methods of longterm performance and durability of ordinary concrete standard " GB/T 50082-2009 and " Standard
Test Method for Determining Age at Cracking and Induced Tensile Stress
Characteristics of Mortar and Concrete under Restrained Shrinkage》ASTM C
1581-2009 is carried out.
The molding and test of compressive strength of sprayed concrete are according to " water conservancy project gunite concrete Experimental Procedures " DL/T 5721-
2015 carry out, and carry out injection molding construction using TK-600 type spraying machine.
The performance test results of all gunite concretes of 1 ~ embodiment of comparative example 3 are shown in Table 4.
As can be seen from Table 4, comparative example 1 is the normal concrete that fine aggregate is natural sand, and comparative example 2 is that fine aggregate is hole
The normal concrete (comparative example 1 and 2 is addition microballon and anti-mud component) of slag Machine-made Sand, embodiment 3 is product of the present invention.3 kinds
The 28d compression strength of gunite concrete is 45 ~ 51MPa, passes through the change to fine aggregate, the admixture of modified component, anti-mud component
Addition, there is no significant changes for the compression strength of concrete.
After the comparison of comparative example 1 and comparative example 2 is it is found that hole slag Machine-made Sand replaces natural sand, the physical property of concrete
Biggish variation has occurred with working performance, the slump drops to 165mm by 195mm, and fall reaches 30mm；Divergence by
33mm drops to 23mm, and fall reaches 10mm；It is inverted slump cylinder emptying time and 38.2s, increase rate is risen to by 12.3s
It has been more than 100%, has been highly detrimental to pumping or the sprayed construction of concrete.Natural sand is in spheroid shape more, and hole slag is mostly tied in the form of sheets
Structure, the former is conducive to the mobility of concrete mix, and the latter is unfavorable for the mobility of concrete mix, so modification need to be taken
Measure.
The comparison of comparative example 2 and embodiment 3 is it is found that adding modified component fly ash micro-sphere and anti-mud component can significantly improve
Concrete physical and working performance.Compared with comparative example 2, the slump of embodiment 3 increases to 203mm by 165mm, increases
Amplitude reaches 38mm；Divergence increases to 38mm by 23mm, and increasing degree reaches 15mm；Be inverted slump cylinder emptying time by
38.2s drops to 15.1s, and fall has been more than 100%, is very beneficial for pumping or the sprayed construction of concrete.Modified component
Microballon is that preferred flyash shape is spherical shape, is filled among the aggregate hole of concrete mix, has lubrication densification, change
The situation of kind hole slag Machine-made Sand laminar flow difference.It is super to be conducive to improve cement content in hole slag Machine-made Sand for the admixture of anti-mud component
Target situation discharges the moisture absorbed by hole slag, increases the mobility of concrete mix, reduces the water ash of gunite concrete
Than significantly improving the correlated performance of hole slag gunite concrete.
Comparative example 1~The comparison of embodiment 3 is it is found that the physical property and working performance difference of gunite concrete are smaller, simultaneously
Also illustrate that the modifying function of related modified component is more significant.Modified component microballon volume used in the present invention is cementitious material
Comprehensively modifying effect is best when 30%, and effect is best when anti-mud component volume is the 5% of cementitious material.
The performance test results of each gunite concrete of 41 ~ embodiment of comparative example of table 3
| Number | The slump (mm) | Divergence (mm) | It is inverted slump cylinder emptying time (s) | 28d compression strength (MPa) |
| Comparative example 1 | 195 | 33 | 14.3 | 50 |
| Comparative example 2 | 165 | 23 | 38.2 | 45 |
| Embodiment 3 | 203 | 38 | 15.1 | 51 |
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further include by with
Technical solution composed by upper any combination of technical features.
Claims (10)
1. a kind of injection hole dreg concrete, it is characterised in that: its each group distribution ratio are as follows: cement 339.5-425 kg/m3, water 170-
195kg/m3,145.5 kg/m3 of modified component, diminishing component 4-4.85kg/m3, anti-24.25 kg/m3 of mud component, fine aggregate
770-890.5 kg/m3, coarse aggregate 770-890.5kg/m3, alkali-free liquid accelerator 30-38.8 kg/m3.
2. a kind of injection hole dreg concrete according to claim 1, it is characterised in that: the fine aggregate is hole slag mechanism
Sand, the hole slag during tunnel excavation, which is crushed, to be made, and particle size range is≤5mm, hole slag in every cube of concrete material
The incorporation of Machine-made Sand is 770-890.5 kg.
3. a kind of injection hole dreg concrete according to claim 2, it is characterised in that: the hole slag Machine-made Sand, shape are in
Laminated structure reduces water content using natural drying, and selection by winnowing reduces content of stone powder, and anti-mud component, which reduces cement content, to be influenced.
4. a kind of injection hole dreg concrete according to claim 1, it is characterised in that: the anti-mud component is in a liquid state, by
Aminobenzenesulfonic acid, dehydrated alcohol, phenol, formaldehyde mix composition in proportion；Aminobenzenesulfonic acid and dehydrated alcohol are mixed by 1:5 first
It closes, is warming up to 50 DEG C ± 2, then phenol and formaldehyde are added in mixed liquor, the ratio aminobenzenesulfonic acid of final mixed liquor: anhydrous
Ethyl alcohol: phenol: formaldehyde 1:5:3:10 heats up 100 DEG C ± 2 and constant temperature 3-7 h and forms.
5. a kind of injection hole dreg concrete according to claim 1, it is characterised in that: the modified component is that flyash is micro-
Pearl, the specific surface area of fly ash micro-sphere are 420-450 m2/ kg, the incorporation of microballon is 145.5 in every cube of concrete material
kg。
6. a kind of injection hole dreg concrete according to claim 1, it is characterised in that: the diminishing group is divided into polyocarboxy acid type
Water-reducing agent, solid content 20%-50%, water-reducing rate 10%-40%, the incorporation of water-reducing agent is 4- in every cube of concrete material
4.85 kg。
7. a kind of injection hole dreg concrete according to claim 1, it is characterised in that: the alkali-free liquid accelerator
28d compressive strength rate is greater than 120%, and incorporation is 30-38.8kg in every cube of concrete material.
8. a kind of injection hole dreg concrete according to claim 1, it is characterised in that: the cement is portland cement,
The specific surface area of cement is 300-400m2/ kg, the incorporation of cement is 339.5-425kg in every cube of concrete material.
9. a kind of injection hole dreg concrete according to claim 1, it is characterised in that: the coarse aggregate is that gradation is good
Stone, the particle size range of stone are 5-10mm, and the incorporation of stone is 770-890.5 kg in every cube of concrete material.
10. a kind of preparation method for spraying hole dreg concrete according to claim 1, it is characterised in that: including walking as follows
It is rapid:
1) first that fine aggregate, that is, hole slag Machine-made Sand natural drying is dry to saturation plane, then selection by winnowing reduces content of stone powder, beats
Agglomerate block part；
2) hole slag Machine-made Sand is crossed into 4.75mm sieve again, screens out the block greater than 4.75mm and agglomerate part；
3) forced mixer, 1 min of dry mixing then is added in coarse aggregate, hole slag Machine-made Sand, cement and fly ash micro-sphere；
4) again by diminishing component, anti-mud component and water uniform mixing；
5) mixing water mixed through step 4) is added into agitated kettle, continues to stir 3 min, microsphere modified high-performance hole slag is made
Gunite concrete mixture；
6) will be through above-mentioned steps 1) -5) preparation gunite concrete mixture and alkali-free liquid accelerator in proportion, pass through coagulation
Native spraying machine injection mixing, is made a kind of injection hole dreg concrete.
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| CN110357520A (en) * | 2019-06-12 | 2019-10-22 | 东南大学 | High-elastic-cracking resistance hole slag gunite concrete material of one kind and preparation method thereof |
| CN110627446A (en) * | 2019-10-18 | 2019-12-31 | 保利长大工程有限公司 | Economical and environment-friendly tunnel shotcrete and construction process |
| CN112479650A (en) * | 2020-11-20 | 2021-03-12 | 中铁二十局集团有限公司 | Desert sand sprayed concrete and preparation method thereof |
| CN112521089A (en) * | 2020-12-07 | 2021-03-19 | 东南大学 | Full-hole slag high-performance concrete and preparation method thereof |
| CN113800860A (en) * | 2021-11-01 | 2021-12-17 | 山西省水利建筑工程局有限公司 | Application of TBM (Tunnel boring machine) hole digging slag in concrete, concrete and preparation of concrete |
| CN115193861A (en) * | 2022-05-19 | 2022-10-18 | 中铁二院工程集团有限责任公司 | Tunnel hole slag in-situ recovery processing system and processing method |
| CN115536341A (en) * | 2022-10-26 | 2022-12-30 | 中建铁路投资建设集团有限公司 | Concrete for heating and shaping full-tunnel hole slag aggregate and preparation method thereof |
| CN115849792A (en) * | 2022-11-28 | 2023-03-28 | 盾构及掘进技术国家重点实验室 | Preparation method of sprayed concrete by using rock ballast and matched rock ballast recovery equipment |
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| CN116102301A (en) * | 2023-02-07 | 2023-05-12 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Heat-insulating high-toughness carbonic acid tunnel slag geopolymer shotcrete and preparation method thereof |
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|---|---|---|---|---|
| CN110357520A (en) * | 2019-06-12 | 2019-10-22 | 东南大学 | High-elastic-cracking resistance hole slag gunite concrete material of one kind and preparation method thereof |
| CN110627446A (en) * | 2019-10-18 | 2019-12-31 | 保利长大工程有限公司 | Economical and environment-friendly tunnel shotcrete and construction process |
| CN112479650A (en) * | 2020-11-20 | 2021-03-12 | 中铁二十局集团有限公司 | Desert sand sprayed concrete and preparation method thereof |
| CN112521089A (en) * | 2020-12-07 | 2021-03-19 | 东南大学 | Full-hole slag high-performance concrete and preparation method thereof |
| CN113800860A (en) * | 2021-11-01 | 2021-12-17 | 山西省水利建筑工程局有限公司 | Application of TBM (Tunnel boring machine) hole digging slag in concrete, concrete and preparation of concrete |
| CN115193861A (en) * | 2022-05-19 | 2022-10-18 | 中铁二院工程集团有限责任公司 | Tunnel hole slag in-situ recovery processing system and processing method |
| CN115536341A (en) * | 2022-10-26 | 2022-12-30 | 中建铁路投资建设集团有限公司 | Concrete for heating and shaping full-tunnel hole slag aggregate and preparation method thereof |
| CN115849792A (en) * | 2022-11-28 | 2023-03-28 | 盾构及掘进技术国家重点实验室 | Preparation method of sprayed concrete by using rock ballast and matched rock ballast recovery equipment |
| CN115849792B (en) * | 2022-11-28 | 2023-12-22 | 盾构及掘进技术国家重点实验室 | Method for preparing sprayed concrete by using rock slag and matched rock slag recovery equipment |
| CN116102300A (en) * | 2023-02-07 | 2023-05-12 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Silicon-aluminum tunnel slag geopolymer heat-insulating high-toughness shotcrete and preparation method thereof |
| CN116102301A (en) * | 2023-02-07 | 2023-05-12 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Heat-insulating high-toughness carbonic acid tunnel slag geopolymer shotcrete and preparation method thereof |
| CN116102300B (en) * | 2023-02-07 | 2024-05-28 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Silicon-aluminum tunnel slag geopolymer heat-insulating high-toughness shotcrete and preparation method thereof |
| CN116102301B (en) * | 2023-02-07 | 2024-05-28 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Heat-insulating high-toughness carbonic acid tunnel slag geopolymer shotcrete and preparation method thereof |
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Application publication date: 20190510 |