CN105236887A - C20 coal mine down-hole roadway protection concrete prepared from fly ash aggregates, and preparation method thereof - Google Patents
C20 coal mine down-hole roadway protection concrete prepared from fly ash aggregates, and preparation method thereof Download PDFInfo
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- CN105236887A CN105236887A CN201510598469.4A CN201510598469A CN105236887A CN 105236887 A CN105236887 A CN 105236887A CN 201510598469 A CN201510598469 A CN 201510598469A CN 105236887 A CN105236887 A CN 105236887A
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- lytag
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention belongs to the technical field of coal mine down-hole shotcrete, and relates to a C20 coal mine down-hole roadway protection concrete prepared from fly ash aggregates, and a preparation method thereof. The C20 coal mine down-hole roadway protection concrete prepared from fly ash aggregates is composed of cement, sands, fly ash aggregates, water and a setting accelerator according to a weight ratio of 1:(1.80-2.53):(0.90-1.34):(0.40-0.44):0.05, the density of the concrete is 1800-2200kg/m<3>, and the 28d strength is 29-32MPa. The preparation method of the concrete comprises the following steps: weighing above raw materials according to the weight ratio, immersing the fly ash aggregates in water for at least 1h, drying the surface of the fly ash aggregates in the shade, mixing cement, the sands and the dried aggregates, uniformly stirring, adding water and the setting accelerator, continuously stirring until uniformity, and discharging. The aggregates are used to substitute sands in common concrete, so destroys of quarrying to environment are reduced, wastes are changed into valuables, waste utilization is realized, and the concrete has good environment benefit and economic benefit.
Description
Technical field
The invention belongs to underground coal mine spray concrete technology field, the C20 underground coal mine relating to the preparation of a kind of lytag protects lane concrete and preparation method thereof.
Background technology
Concrete spraying support is a kind of support pattern grown up in steady theoretical basis at country rock, and its advanced technology, construction quality is reliable.Concrete spraying support combines with anchor pole, wire netting, improves supporting performance and construction quality, improves globality and the stability in tunnel, is to apply one of support form very widely at present.
The composition material of normal concrete comprises cement, sand, stone, water and additive, and wherein the source of stone is rubble and cobble, needing to dig mountain rubble or draw to dig river course, causing comparatively havoc to environment to obtain stone.
Flyash is one of industrial residue that the current discharge capacity of China is larger, and along with the development of power industry, the flyash quantity discharged of coal-burning power plant increases year by year.The heavy metal that China about has the cadmium of totally 2.5 ten thousand tons, chromium, arsenic, mercury and plumbous five kinds of state keys to monitor every year, the discharge with flyash enters into physical environment.2013, Coal Ash in China quantity discharged reached 5.32 hundred million tons.Flyash is piled up and is taken a large amount of soil, release objectionable impurities, serious environment pollution.Dropped into a large amount of human and material resources and financial resources for carrying out depositing of flyash with Pollution abatement, but regulation effect is but very limited.
Summary of the invention
For prior art Problems existing, the C20 underground coal mine that the invention provides the preparation of a kind of lytag protects lane concrete and preparation method thereof, object is the while of making concrete meet C20 concrete requirement of strength, reduce concrete density, and flyash is turned waste into wealth, produce good environmental benefit and economic benefit.
To achieve these goals, the present invention adopts following technical scheme:
The C20 underground coal mine of lytag preparation of the present invention protects lane concrete, be made up of cement, sand, lytag, water and accelerating chemicals, wherein in every cubic meter of concrete, the weight ratio of cement, sand, lytag, water and accelerating chemicals is 1:(1.80-2.53): (0.90-1.34): (0.40-0.44): 0.05, its density is 1800-2200kg/m
3, 28 days intensity is 29-32MPa.
Wherein, described lytag is power plant's dry discharge fly ash through the spherical granules of processing, ball processed and sintering, and particle diameter 6-9mm, apparent density is 1590-1650kg/m
3, cylindrical compress strength 5.1-6.0MPa, 1h water-intake rate is 11.5-12.8%.
Described cement selection P32.5 silicate cement.
Described sand selects medium sand, and fineness modulus is 3.0-2.3, and median size is 0.35-0.5mm.
The C20 underground coal mine of lytag preparation of the present invention protects the concrete preparation method in lane to carry out according to following steps:
(1) according to weight ratio: cement: sand: lytag: water: accelerating chemicals=1:(1.80-2.53): (0.90-1.34): (0.40-0.44): the ratio of 0.05 takes raw material;
(2) lytag is soaked at least 1h in water, lytag surface of then drying in the shade;
(3) by cement, sand and the haydite mixing and stirring after drying in the shade, water and accelerating chemicals continuation stirring is then dropped into, until evenly go out machine.
Compared with prior art, feature of the present invention and beneficial effect are:
The present invention is by adding cement, sand, water and accelerating chemicals by the dry discharge fly ash of power plant prepare C20 concrete through processing, ball processed, the ball-type haydite that sinters, not only obtained concrete meets the requirement of C20 concrete strength, and lower than existing C20 concrete density, be beneficial to transport and construction;
Be applied to coal mine down-hole tunnel spray concrete, both can obtain desirable supporting effect, and improve improving stability of surrounding rocks in roadway, and haydite replaces the stone in normal concrete, decrease the destruction of quarrying to environment, turn waste into wealth, achieve utilization of waste material, there is good environmental benefit and economic benefit.
Embodiment
Further illustrate the present invention below in conjunction with embodiment, but scope of the present invention is not limited to the following examples.
Embodiment 1
The C20 underground coal mine of the lytag preparation of the present embodiment protects lane concrete, is made up of P32.5 silicate cement, sand, lytag, water and accelerating chemicals, preparation 1m
3underground coal mine protects lane C20 flyash-haydite concrete needs cement: 450kg; sand: 810kg; haydite: 605kg; water: 180kg; accelerating chemicals: 22.5kg; namely in every cubic meter of concrete, the weight ratio of cement, sand, lytag, water and accelerating chemicals is 1:1.80:1.34:0.40:0.05, and its density is 1988kg/m
3, 28 days intensity is 29.6MPa.
Wherein, described lytag is power plant's dry discharge fly ash through the spherical granules of processing, ball processed and sintering, and particle diameter 6mm, apparent density is 1590kg/m
3, cylindrical compress strength 5.5MPa, 1h water-intake rate is 12.1%.
Described sand selects medium sand, and fineness modulus is 2.8, and median size is 0.45mm.
The C20 underground coal mine of the lytag preparation of the present embodiment protects the concrete preparation method in lane to carry out according to following steps:
(1) according to weight ratio: P32.5 silicate cement: sand: lytag: water: the ratio of accelerating chemicals=1:1.80:1.34:0.40:0.05 takes raw material;
(2) lytag is soaked 1h in water, lytag surface of then drying in the shade;
(3) by cement, sand and the haydite mixing and stirring after drying in the shade, water and accelerating chemicals continuation stirring is then dropped into, until evenly go out machine.
Embodiment 2
The C20 underground coal mine of the lytag preparation of the present embodiment protects lane concrete, is made up of P32.5 silicate cement, sand, lytag, water and accelerating chemicals, preparation 1m
3underground coal mine protects lane C20 flyash-haydite concrete needs cement: 450kg; sand: 920kg; haydite: 510kg; water: 190kg; accelerating chemicals: 22.5kg; namely in every cubic meter of concrete, the weight ratio of cement, sand, lytag, water and accelerating chemicals is 1:2.04:1.13:0.42:0.05, and its density is 2003kg/m
3, 28 days intensity is 30.2MPa.
Wherein, described lytag is power plant's dry discharge fly ash through the spherical granules of processing, ball processed and sintering, and particle diameter 9mm, apparent density is 1620kg/m
3, cylindrical compress strength 5.1MPa, 1h water-intake rate is 11.5%.
Described sand selects medium sand, and fineness modulus is 3.0, and median size is 0.35mm.
The C20 underground coal mine of the lytag preparation of the present embodiment protects the concrete preparation method in lane to carry out according to following steps:
(1) according to weight ratio: P32.5 silicate cement: sand: lytag: water: the ratio of accelerating chemicals=1:2.04:1.13:0.42:0.05 takes raw material;
(2) lytag is soaked at least 2h in water, lytag surface of then drying in the shade;
(3) by cement, sand and the haydite mixing and stirring after drying in the shade, water and accelerating chemicals continuation stirring is then dropped into, until evenly go out machine.
Embodiment 3
The C20 underground coal mine of the lytag preparation of the present embodiment protects lane concrete, is made up of P32.5 silicate cement, sand, lytag, water and accelerating chemicals, preparation 1m
3underground coal mine protects lane C20 flyash-haydite concrete needs cement: 450kg; sand: 1140kg; haydite: 405kg; water: 200kg; accelerating chemicals: 22.5kg; namely in every cubic meter of concrete, the weight ratio of cement, sand, lytag, water and accelerating chemicals is 1:2.53:0.90:0.44:0.05, and its density is 2118kg/m
3, 28 days intensity is 31.7MPa.
Wherein, described lytag is power plant's dry discharge fly ash through the spherical granules of processing, ball processed and sintering, and particle diameter 8mm, apparent density is 1650kg/m
3, cylindrical compress strength 6.0MPa, 1h water-intake rate is 12.8%.
Described sand selects medium sand, and fineness modulus is 2.3, and median size is 0.5mm.
The C20 underground coal mine of the lytag preparation of the present embodiment protects the concrete preparation method in lane to carry out according to following steps:
(1) according to weight ratio: P32.5 silicate cement: sand: lytag: water: the ratio of accelerating chemicals=1:2.53:0.90:0.44:0.05 takes raw material;
(2) lytag is soaked 2.5h in water, lytag surface of then drying in the shade;
(3) by cement, sand and the haydite mixing and stirring after drying in the shade, water and accelerating chemicals continuation stirring is then dropped into, until evenly go out machine.
Claims (5)
1. the C20 underground coal mine of a lytag preparation protects lane concrete, it is characterized in that being made up of cement, sand, lytag, water and accelerating chemicals, wherein in every cubic meter of concrete, the weight ratio of cement, sand, lytag, water and accelerating chemicals is 1:(1.80-2.53): (0.90-1.34): (0.40-0.44): 0.05, its density is 1800-2200kg/m
3, 28 days intensity is 29-32MPa.
2. the C20 underground coal mine of a kind of lytag preparation according to claim 1 protects lane concrete, it is characterized in that described lytag is power plant's dry discharge fly ash through the spherical granules of processing, ball processed and sintering, particle diameter 6-9mm, apparent density is 1590-1650kg/m
3, cylindrical compress strength 5.1-6.0MPa, 1h water-intake rate is 11.5-12.8%.
3. the C20 underground coal mine of a kind of lytag preparation according to claim 1 protects lane concrete, it is characterized in that described cement selection P32.5 silicate cement.
4. the C20 underground coal mine of a kind of lytag preparation according to claim 1 protects lane concrete, and it is characterized in that described sand selects medium sand, fineness modulus is 3.0-2.3, and median size is 0.35-0.5mm.
5. the C20 underground coal mine of lytag preparation as claimed in claim 1 protects the concrete preparation method in lane, it is characterized in that carrying out according to following steps:
(1) according to weight ratio: cement: sand: lytag: water: accelerating chemicals=1:(1.80-2.53): (0.90-1.34): (0.40-0.44): the ratio of 0.05 takes raw material;
(2) lytag is soaked at least 1h in water, lytag surface of then drying in the shade;
(3) by cement, sand and the haydite mixing and stirring after drying in the shade, water and accelerating chemicals continuation stirring is then dropped into, until evenly go out machine.
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| CN201510598469.4A CN105236887B (en) | 2015-09-21 | 2015-09-21 | C20 underground coal mines shield lane concrete that lytag is prepared and preparation method thereof |
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| CN105236887B CN105236887B (en) | 2017-11-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108298896A (en) * | 2018-01-02 | 2018-07-20 | 神华集团有限责任公司 | A kind of concrete and its application method being used to prepare underground bottom plate |
| CN111285652A (en) * | 2020-03-14 | 2020-06-16 | 新疆西部丝路交通产业创新联盟科技有限公司 | High-performance concrete |
| CN112125599A (en) * | 2020-08-28 | 2020-12-25 | 同济大学 | Preparation method of concrete decorative plate |
| CN116161918A (en) * | 2022-05-18 | 2023-05-26 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Sprayed concrete shrinkage regulation and control method based on hole structure characteristics |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718443A (en) * | 2012-06-11 | 2012-10-10 | 西南交通大学 | Ceramsite dual-doped shotcrete for high-temperature tunnel rock surfaces |
| CN103553448A (en) * | 2013-09-27 | 2014-02-05 | 北京仁创科技集团有限公司 | Ceramsite water permeable brick and preparation method thereof |
| CN104876485A (en) * | 2015-05-14 | 2015-09-02 | 淮南矿业(集团)有限责任公司 | Concrete with heat insulation performance |
-
2015
- 2015-09-21 CN CN201510598469.4A patent/CN105236887B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718443A (en) * | 2012-06-11 | 2012-10-10 | 西南交通大学 | Ceramsite dual-doped shotcrete for high-temperature tunnel rock surfaces |
| CN103553448A (en) * | 2013-09-27 | 2014-02-05 | 北京仁创科技集团有限公司 | Ceramsite water permeable brick and preparation method thereof |
| CN104876485A (en) * | 2015-05-14 | 2015-09-02 | 淮南矿业(集团)有限责任公司 | Concrete with heat insulation performance |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108298896A (en) * | 2018-01-02 | 2018-07-20 | 神华集团有限责任公司 | A kind of concrete and its application method being used to prepare underground bottom plate |
| CN111285652A (en) * | 2020-03-14 | 2020-06-16 | 新疆西部丝路交通产业创新联盟科技有限公司 | High-performance concrete |
| CN112125599A (en) * | 2020-08-28 | 2020-12-25 | 同济大学 | Preparation method of concrete decorative plate |
| CN112125599B (en) * | 2020-08-28 | 2022-04-05 | 同济大学 | Preparation method of concrete decorative plate |
| CN116161918A (en) * | 2022-05-18 | 2023-05-26 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Sprayed concrete shrinkage regulation and control method based on hole structure characteristics |
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Application publication date: 20160113 Assignee: Liaoning Xinying Mining Technology Co.,Ltd. Assignor: LIAONING TECHNICAL University Contract record no.: X2023210000021 Denomination of invention: C20 coal mine underground roadway protection concrete prepared with fly ash ceramsite and its preparation method Granted publication date: 20171121 License type: Common License Record date: 20230320 |
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