CN107235690A - The CS30 steel fiber shotcretes that a kind of utilization iron tailings sand is prepared - Google Patents
The CS30 steel fiber shotcretes that a kind of utilization iron tailings sand is prepared Download PDFInfo
- Publication number
- CN107235690A CN107235690A CN201710549539.6A CN201710549539A CN107235690A CN 107235690 A CN107235690 A CN 107235690A CN 201710549539 A CN201710549539 A CN 201710549539A CN 107235690 A CN107235690 A CN 107235690A
- Authority
- CN
- China
- Prior art keywords
- iron tailings
- consumption
- tailings sand
- shotcretes
- steel fiber
- 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.)
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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
- 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
Abstract
The present invention relates to the CS30 steel fiber shotcretes that a kind of utilization iron tailings sand is prepared, each component and its percentage by weight are：Cement consumption：12~14%；Silica flour consumption：1.5~2.0%；Flyash consumption：3~4%；Rubble consumption：28~35%；Iron tailings sand consumption：35~42%；Dosage of steel fiber：1.2~2%；Water consumption：7.5~8.5%；Polycarboxylate water-reducer consumption：0.18~0.25%；Accelerator consumption：1.3~1.8%.The present invention substitutes natural river sand using iron tailings sand 100%, can effectively reduce the exhaustive exploitation of natural river sand, and combines the regional superiority of iron producing area, and the mine solid wastes such as iron tailings sand are consumed to greatest extent.Simultaneously because employing steel fibre, tensile strength, rupture strength and the adhesive force of concrete are considerably improved, the toughness of structure is also greatly improved.
Description
Technical field
The invention belongs to construction engineering technical field, more particularly to the CS30 injection steel that a kind of utilization iron tailings sand is prepared are fine
Tie up concrete.
Background technology
C30 gunite concretes are mainly used in the disposal on after tunnel, Jing Kuang tunnels are dug and road bank protection surface.By
In plain concrete tensile strength itself than relatively low, a steel wire is typically fixed on surface before injection C30 concrete, is then sprayed
The C30 concrete for penetrating 50mm-100mm carries out temperature pier, cutting face is completely covered, it is ensured that will not occur soil and rubble etc.
Drop, then carry out next step and permanently reinforce.But it is due to that steel wire eyelet is finer and closely woven, easily produces lining cutting and come to nothing existing
As simultaneously because needing artificial linked network before gunite concrete, there is hidden danger.
Iron tailings sand is the ore that metal or non-metal mine are produced, through selecting factory to produce grain after selecting valuable concentrate
The smaller sand in footpath the same " waste residue ", is called CHARACTERISTICS OF TAILINGS SAND.The quantity that these CHARACTERISTICS OF TAILINGS SANDs are produced every year is very big (in terms of hundred million tons), needs
Want substantial amounts of soil to stack, stack not only cause the waste of land resource for a long time, in addition can large area be annihilated farmland, silt up
River course, causes serious environmental pollution.
Therefore, iron tailings sand is comprehensively utilized, both cost-saved (saving more than 10%) can consume substantial amounts of mine tailing again
Sand, reduces environmental pollution, obtains very big economic benefit and social benefit.
The preparation technology and performance for having carried out the common river sand steel fibrous shotcretes of a large amount of C30 in existing research paper are ground
Study carefully achievement.Due to the long-term body spherical in shape under current scour of river sand particle, and point is presented because of mechanical force in iron tailings sand particle
The irregular body of sharp corner angle, in addition, river sand grain diameter is more than iron tailings sand grains footpath, causes specific surface area to be less than iron tailings sand.
This is resulted in：The gel material content and water requirement for preparing CS30 iron tailings sand steel fiber shotcretes are common more than C30
River sand steel fibrous shotcrete, could meet the construction technical requirement of gunite concrete.
In summary, the report of CS30 iron tailings sand steel fiber shotcretes is there is no at present.
The content of the invention
Fully meet in terms of it is an object of the invention to provide a kind of mechanical property, deformation performance and durability using natural
The CS30 steel fiber shotcretes that the utilization iron tailings sand of sand configuration is prepared.
The present invention is to utilize Portland cement, silica flour, flyash, rubble, iron tailings sand, steel fibre, water reducer, water
It is prepared from by a certain percentage with accelerator.
The CS30 steel fiber shotcretes that a kind of utilization iron tailings sand of the present invention is prepared, each component and its weight percent
Than for：Cement consumption：12~14%；Silica flour consumption：1.5~2.0%；Flyash consumption：3~4%；Rubble consumption：28~
35%；Iron tailings sand consumption：35~42%；Dosage of steel fiber：1.2~2%；Water consumption：7.5~8.5%；Polycarboxylate water-reducer
Consumption：0.18~0.25%；Accelerator consumption：1.3~1.8%.
Described cement preferably scenery with hills and waters work source cement, is PO42.5 Portland cements, the presetting period is 50min,
Final setting time is 625min (15 DEG C of water temperature), and specific surface area is 321m2/kg。
Described silica flour preferably silica flour uses Ai Ken international trades (Shanghai) Co., Ltd., and average grain diameter is 0.1mm, than
Surface area 21000m2/ kg, wherein SiO2Content is more than 90%, and moisture content is less than 2%.
Described flyash is preferably the vast and boundless Wood construction material factory in Shenyang, and using II grade of flyash, fineness is 18, loss on ignition
For 6.8.
Described rubble is preferably Liaoyang stone factory, is Guamishi, lime stone material, and maximum particle diameter is 10mm, 5~
10mm grades are matched somebody with somebody.
Described iron tailings sand is preferably Liaoyang iron tailings, and particle diameter is respectively less than 2mm.
Described steel fibre is preferably the production of Anshan Chang Hong developments in science and technology Co., Ltd, fine using shearing undaform steel
Dimension, specification is 30mm × 0.8mm (length × diameter), and draw ratio is 37.5, tensile strength >=600MPa.
Described water reducer is preferably that Liaoning Province Jian Keyuan is developed, and is polycarboxylic acid series high efficiency water reducing agent, water-reducing rate is more than
25%.
Described accelerator is preferably the production of Shenyang Ding Tai concrete admixtures factory, is DT type cement hardeners.
It is an advantage of the invention that：The present invention substitutes natural river sand using iron tailings sand 100%, can effectively reduce natural river
The exhaustive exploitation of sand, and the regional superiority of iron producing area is combined, the mine solid wastes such as iron tailings sand are consumed to greatest extent.While by
In employing steel fibre, tensile strength, rupture strength and the adhesive force of concrete are considerably improved, the toughness of structure is also significantly
Improve；Effectively reduction iron ore roadway support construction costs, can be widely applied to after tunnel, Jing Kuang tunnels are dug and road shield
The disposal on slope surface.Security maintenance expense, enterprise profit margin are saved for enterprise.
Embodiment
With reference to embodiment, the invention will be further described.
Using iron tailings sand prepare CS30 steel fiber shotcretes be by Portland cement, silica flour, flyash,
Rubble, iron tailings sand, steel fibre, water reducer and water make by a certain percentage with and also into.Preparation method prepares work using wet shot
Skill, its method：Rubble+sand+cement+water of silica flour+75% --- no less than 30 seconds --- water of water reducer+25% --- mix by mix
The conjunction time is no less than 30 seconds.In addition, accelerator is mixed at shower nozzle with mix.
Being prepared by the CS30 steel fiber shotcrete components of iron tailings sand preparation has percentage by weight as follows：
CS30 iron tailings sand steel fiber shotcretes and the common river sand steel fibrous shotcrete performance comparisions of C30
Note：Comparative example 1：Existing C30 river sands steel fibrous shotcrete performance indications；Comparative example 2：By river in comparative example 1
Gunite concrete performance indications after sand is directly substituted with iron tailings sand；
It can be seen that by the spray-fiber concrete of the present invention and the contrast experiment of plain concrete：Spray-fiber concrete
After test specimen crack occurs under load action, its width expands with the increase of load, reaches after peak load, with crack
The continuation of width expands and occurred the phenomenon slowly unloaded, and the load deflection curves that it is destroyed are similar to armored concrete.Explanation
The more common gunite concrete of steel fiber shotcrete has more preferable cracking resistance and toughness, embodies steel fiber shotcrete good
Good non-deformability.Therefore bar-mat reinforcement need not be hung again before CS30 steel fiber shotcretes, its tensile strength, anti-folding
Intensity and adhesive force, the toughness of structure are also greatly improved, while also improving the security of construction, injection can be reduced under identical operating mode
The thickness of concrete, improves economic performance.
Claims (10)
1. the CS30 steel fiber shotcretes that a kind of utilization iron tailings sand is prepared, each component and its percentage by weight are：Cement
Consumption：12~14%；Silica flour consumption：1.5~2.0%；Flyash consumption：3~4%；Rubble consumption：28~35%；Iron tailings
Sand consumption：35~42%；Dosage of steel fiber：1.2~2%；Water consumption：7.5~8.5%；Polycarboxylate water-reducer consumption：0.18~
0.25%；Accelerator consumption：1.3~1.8%.
2. the CS30 steel fiber shotcretes that utilization iron tailings sand according to claim 1 is prepared, it is characterised in that institute
The cement stated is PO42.5 Portland cements, and the presetting period is 50min, and final setting time is 625min (15 DEG C of water temperature), than
Surface area is 321m2/kg。
3. the CS30 steel fiber shotcretes that utilization iron tailings sand according to claim 1 is prepared, it is characterised in that institute
The cement stated is PO42.5 Portland cements, and the presetting period is 50min, and final setting time is 625min (15 DEG C of water temperature), than
Surface area is 321m2/kg。
4. the CS30 steel fiber shotcretes that utilization iron tailings sand according to claim 1 is prepared, it is characterised in that institute
The silica flour average grain diameter stated is 0.1mm, specific surface area 21000m2/ kg, wherein SiO2Content is more than 90%, and moisture content is less than 2%.
5. the CS30 steel fiber shotcretes that utilization iron tailings sand according to claim 1 is prepared, it is characterised in that institute
The flyash stated is using II grade of flyash, and fineness is 18, and loss on ignition is 6.8.
6. the CS30 steel fiber shotcretes that utilization iron tailings sand according to claim 1 is prepared, it is characterised in that institute
The rubble stated is Guamishi, and lime stone material, maximum particle diameter is 10mm, and 5~10mm grades are matched somebody with somebody.
7. the CS30 steel fiber shotcretes that utilization iron tailings sand according to claim 1 is prepared, it is characterised in that institute
The iron tailings sand grains footpath respectively less than 2mm stated.
8. the CS30 steel fiber shotcretes that utilization iron tailings sand according to claim 1 is prepared, it is characterised in that institute
The steel fibre stated is 30mm × 0.8mm (length × diameter) using shearing undaform steel fibre, specification, and draw ratio is 37.5,
Tensile strength >=600MPa.
9. the CS30 steel fiber shotcretes that utilization iron tailings sand according to claim 1 is prepared, it is characterised in that institute
The water reducer stated is polycarboxylic acid series high efficiency water reducing agent, and water-reducing rate is more than 25%.
10. the CS30 steel fiber shotcretes that utilization iron tailings sand according to claim 1 is prepared, it is characterised in that institute
The accelerator stated is DT type cement hardeners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710549539.6A CN107235690A (en) | 2017-07-07 | 2017-07-07 | The CS30 steel fiber shotcretes that a kind of utilization iron tailings sand is prepared |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710549539.6A CN107235690A (en) | 2017-07-07 | 2017-07-07 | The CS30 steel fiber shotcretes that a kind of utilization iron tailings sand is prepared |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107235690A true CN107235690A (en) | 2017-10-10 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710549539.6A Pending CN107235690A (en) | 2017-07-07 | 2017-07-07 | The CS30 steel fiber shotcretes that a kind of utilization iron tailings sand is prepared |
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| CN (1) | CN107235690A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437715A (en) * | 2018-10-29 | 2019-03-08 | 贵州锦丰矿业有限公司 | A kind of shaft and drift supporting wet shotcreting and production method |
| CN115636641A (en) * | 2022-10-28 | 2023-01-24 | 中国一冶集团有限公司 | High-impermeability graphene oxide concrete and preparation method thereof |
| CN115677321A (en) * | 2022-11-23 | 2023-02-03 | 山东高速工程检测有限公司 | Sprayed concrete containing iron tailing sand and preparation method and application thereof |
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| CN101238078A (en) * | 2005-08-12 | 2008-08-06 | M·道森 | Lime independent cementitious mixtures |
| CN102850011A (en) * | 2011-07-01 | 2013-01-02 | 北京建筑材料科学研究总院有限公司 | Technological process for preparing active powder concrete by using iron tailing |
| CN103359982A (en) * | 2012-03-26 | 2013-10-23 | 中国矿业大学(北京) | Sprayed concrete material prepared by using iron tailings |
| CN105036956A (en) * | 2015-08-05 | 2015-11-11 | 杭州兴润筛网有限公司 | Composite vegetation concrete greening additive |
| CN106477987A (en) * | 2016-09-29 | 2017-03-08 | 甘肃凯帝兰建材有限公司 | Novel injection concrete |
-
2017
- 2017-07-07 CN CN201710549539.6A patent/CN107235690A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101238078A (en) * | 2005-08-12 | 2008-08-06 | M·道森 | Lime independent cementitious mixtures |
| CN102850011A (en) * | 2011-07-01 | 2013-01-02 | 北京建筑材料科学研究总院有限公司 | Technological process for preparing active powder concrete by using iron tailing |
| CN103359982A (en) * | 2012-03-26 | 2013-10-23 | 中国矿业大学(北京) | Sprayed concrete material prepared by using iron tailings |
| CN105036956A (en) * | 2015-08-05 | 2015-11-11 | 杭州兴润筛网有限公司 | Composite vegetation concrete greening additive |
| CN106477987A (en) * | 2016-09-29 | 2017-03-08 | 甘肃凯帝兰建材有限公司 | Novel injection concrete |
Non-Patent Citations (1)
| Title |
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| 唐咏梅: "《混凝土工程施工现场常遇问题300例》", 31 March 2015 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437715A (en) * | 2018-10-29 | 2019-03-08 | 贵州锦丰矿业有限公司 | A kind of shaft and drift supporting wet shotcreting and production method |
| CN115636641A (en) * | 2022-10-28 | 2023-01-24 | 中国一冶集团有限公司 | High-impermeability graphene oxide concrete and preparation method thereof |
| CN115677321A (en) * | 2022-11-23 | 2023-02-03 | 山东高速工程检测有限公司 | Sprayed concrete containing iron tailing sand and preparation method and application thereof |
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Application publication date: 20171010 |