CN109053062A - A kind of coal gangue concrete and the preparation method and application thereof - Google Patents
A kind of coal gangue concrete and the preparation method and application thereof Download PDFInfo
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- CN109053062A CN109053062A CN201811220867.2A CN201811220867A CN109053062A CN 109053062 A CN109053062 A CN 109053062A CN 201811220867 A CN201811220867 A CN 201811220867A CN 109053062 A CN109053062 A CN 109053062A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
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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
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- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of coal gangue concrete and the preparation method and application thereof, the coal gangue concrete component include coal shale in brick making and concrete material, specifically include corresponding proportion gangue aggregate, admixture, cementitious material, mixing water, natural coarse aggregate and natural fine aggregate；Coal shale in brick making adds weight≤coal gangue concrete gross weight 30%.The preparation method comprises the following steps: the broken flushing drying of gangue is obtained sediment and gangue aggregate, sediment prepares admixture after processing；Mixing portion raw material is once stirred according to the ratio, forms primary stirring material；Respective material is added thereto, carries out secondary agitation and coal gangue concrete is made.It is not required to repeatedly be crushed gangue in this method, environment-friendly high-efficiency, saves mass energy, be conducive to industrialized production, coal gangue concrete, which is made, has better mechanical property, and workability also increases, and coal gangue concrete can be applied to concrete filled steel tubular member preparation technical field.
Description
Technical field:
The invention belongs to building structure technology fields, and in particular to a kind of coal gangue concrete and preparation method thereof with answer
With.
Background technique:
China is coal-fired big country, and the lower gangue of a large amount of phosphorus content can be adulterated in progress of coal mining, this carbon
The mixture calorific capacity of matter, shale and arenaceous rock is low, and harder than coal, combustibility is very poor.Currently, China's accumulation gangue is more than
1000000000 tons, and 100,000,000 tons of gangue are still discharged every year.The coal gangue hill arbitrarily accumulated occupies large amount of land resources, is accumulating
During, it also occur that spontaneous combustion, causes safety problem；With the accumulation of time, evolution or the sulfide leached are to periphery
Soil and groundwater influences extremely severe, the normal life of resident near threat.
Currently, gangue is mainly used in underground filling, reclaims and the Preliminary Applications stage such as build up fields, build the road；Certain applications in
Building aspect, such as the materials such as aglite, refractory brick of gangue cement, concrete, but in these application processes, to coal
So that process cost is excessively high, process is many and diverse, is not suitable for for the repeatedly broken of spoil, grinding or the processing of some physics and chemistry
Large batch of merchandized handling.
In existing coal gangue concrete preparation process the particle size range of gangue is only adopted substantially in 5~30mm
With coarse aggregate (partial size is 4.75~31.5mm) gangue.In order to reach the use partial size of gangue, then need to gangue
It is repeatedly crushed, plenty of time and energy is consumed during this, produce more fine aggregates for being less than Particle size requirements
With micro mist ingredient, these extra gangue ingredients are without reasonably handling, the problem of also causing secondary pollution.
Summary of the invention:
The purpose of the present invention is overcoming above-mentioned the shortcomings of the prior art, a kind of coal gangue concrete and its preparation are provided
Method and application.The gangue particle size range utilized in this coal gangue concrete using large-particle-size aggregate is 0~60mm,
Gangue after broken does not distinguish fine aggregate, coarse aggregate and gangue block, and partial size is directly less than to the ingredient of 60mm
It is considered as gangue material to use in the configuration of fresh concrete, makes full use of Coal Gangue Resource, reduce broken process, utilizes
It is high-efficient and save mass energy.
To achieve the above object, the invention adopts the following technical scheme:
A kind of coal gangue concrete, component include coal shale in brick making and concrete material；Wherein, the coal shale in brick making
Including component are as follows: gangue aggregate and admixture, the concrete material include cementitious material, mixing water, natural thick bone
Material and natural fine aggregate, each component percent by volume are v1:v2:v3:v4:v5:v6=(22%~25%): 2%:(11%~
14%): (12%~18%): (22%~25%): (22%~25%)；Wherein: the v1 is gangue aggregate volume, v2
For admixture volume, v3 is cementitious material volume, and v4 is mixing water volume, and v5 is natural coarse aggregate volume, and v6 is natural fine
Aggregate volume；
The concrete material is formulated using conventional concrete preparation method, and the coal shale in brick making adds weight
Amount≤coal gangue concrete total weight 30%, remaining composition are concrete material.
Coal gangue concrete sand coarse aggregate ratio >=0.45.
The gangue aggregate size is 0.075~60mm.
The cementitious material is cement.
The natural coarse aggregate is rubble or cobble, and material is andesite or monzonite etc..
The natural fine aggregate is river sand or Machine-made Sand.
The coal gangue concrete compression strength is C20~C80, i.e. cubic compressive strength meets 20~80MPa, is resisted
Shock stability, contraction, Creep Characteristics and same intensity normal concrete similar performance.
The preparation method of the coal gangue concrete is prepared using two stages mix method, comprising the following steps:
Step 1, prepared by coal shale in brick making:
(1) gangue is crushed, obtains gangue material, drying is rinsed to the gangue material, is obtained
Sediment and gangue aggregate, the precipitate particle sizes < 0.075mm, the gangue aggregate size is 0.075~
60mm；
(2) by sediment by drying, preheating and calcining obtain calcined product, alkali-activator are added into calcined product,
It is 200~300 mesh that partial size is ground to after mixing, and admixture is made；Wherein, the calcination temperature is 500 DEG C, and calcination time is
1% that quality is calcined product quality is added in 20min, the alkali-activator；
Step 2, prepared by coal gangue concrete:
(1) it is v1:v2:v3:v4:v5:v6=(22%~25%): 2%:(11%~14% by percent by volume):
(12%~18%): (22%~25%): (22%~25%), stock；
(2) once stirred, detailed process are as follows: by v1 gangue aggregate, v2 admixture, 0.5v3 cementitious material and
The mixing of 0.5v4 mixing water, stirs evenly, and forms primary stirring material；
(3) v5 natural coarse aggregate, the natural fine aggregate of v6,0.5v3 cementitious material and 0.5v4 is added into primary stirring material
Mixing water carries out secondary agitation, and coal gangue concrete is made after mixing evenly, wherein the coal shale in brick making adds weight
Amount≤coal gangue concrete total weight 30%, so that the concrete of preparation keeps good mechanical property.
In the step 1 (1), gangue material is rinsed after drying by pre-wetted treatment, the pre-wetted treatment process
Are as follows: take rinse it is dry after gangue material, be added prewet with water thereto, making to prewet is immersed with water, and described prewets
It is 0.7 × (m that quality, which is added, with water0˙w0), even if the gangue material after dry reaches 70% saturation state；Wherein, m0For drying
Gangue quality of material afterwards, w0For the water absorption rate of gangue material after drying.
Coal gangue concrete is applied to concrete filled steel tubular member preparation technical field, specifically, the gangue is mixed
Solidifying soil, which is poured into steel pipe, is made concrete filled steel tubular member, wherein the steel tube section shape is round, rectangle or ellipse
Shape.
Beneficial effects of the present invention:
(1) do not have in this method it is repetitious gangue is crushed, omit the screening process of gangue, do not distinguish coal
Spoil coarse aggregate, gangue fine aggregate and gangue block, the ingredient by particle size range less than 60mm are collectively regarded as gangue object
Material, reduces broken process, and work efficiency is high, saves mass energy, is conducive to industrialized production；
(2) this method is approximately 100% for the utilization rate of gangue, can be effective without considering the problems of secondary pollution
Ground mitigates gangue and adversely affects caused by environment；
(3) Secondary mixing used in this method enhances cement gel body and bone compared with traditional stirring technique
Cohesive force between material has apparent humidification to the performance of the coal gangue concrete using large-particle-size aggregate；
(4) in addition to this, the addition of admixture reduces the dosage of cement, has saved cost, has further improved brand-new coagulation
The mechanical property of soil, improves the workability of fresh concrete.
Detailed description of the invention:
Fig. 1 is process flow diagram prepared by coal gangue concrete of the invention；
Fig. 2 is structural map of the present invention using the circular steel tube concrete component of coal gangue concrete casting；
Fig. 3 is structural map of the present invention using the square steel-pipe concrete component of coal gangue concrete casting；
Fig. 4 is structural map of the present invention using the oval concrete filled steel tubular member of coal gangue concrete casting；Wherein: 1-
Coal gangue concrete, 2- coal shale in brick making, 3- steel pipe.
Specific embodiment:
Below with reference to embodiment, the present invention is described in further detail.
Embodiment 1
A kind of coal gangue concrete, component include coal shale in brick making and concrete material；Wherein, the coal shale in brick making
Including component are as follows: gangue aggregate and admixture, the concrete material include cementitious material, mixing water, natural thick bone
Material and natural fine aggregate, each component percent by volume are v1:v2:v3:v4:v5:v6=22%:2%:14%:18%:22%:
22%；Wherein: the v1 is gangue aggregate volume, and v2 is admixture volume, and v3 is cementitious material volume, and v4 is that stirring is used
Water volume, v5 are natural coarse aggregate volume, and v6 is natural fine aggregate volume；
The gangue aggregate size is 0.075~60mm；
The cementitious material is cement；
The natural coarse aggregate is rubble or cobble, and material is andesite or monzonite etc.；
The natural fine aggregate is river sand or Machine-made Sand；
The concrete material uses conventional concrete preparation method, is mixed according to the above ratio by cement, sand, stone, water
It is uniformly formulated, the coal shale in brick making addition weight is the 30% of coal gangue concrete total weight, remaining composition is mixed
Solidifying soil material.
The coal gangue concrete compression strength is C20~C80, i.e. cubic compressive strength meets 20~80MPa, is resisted
Shock stability, contraction, Creep Characteristics and same intensity normal concrete similar performance.
The preparation method of the coal gangue concrete, process flow diagram are as shown in Figure 1, comprising the following steps:
Step 1, prepared by coal shale in brick making:
(1) gangue is crushed, obtains gangue material, passed through after being rinsed drying to the gangue material
Cross pre-wetted treatment, the specific process is as follows: take rinse it is dry after gangue material, be added prewet with water thereto, make to prewet
It is immersed with water, it is 0.7 × (m that quality, which is added, with water in described prewetting0˙w0), make it is dry after gangue material to reach 70% full
And state；Wherein, m0For gangue quality of material, w after drying0For the water absorption rate of gangue material after drying；Obtain partial size <
The sediment and partial size of 0.075mm are the gangue aggregate of 0.075~60mm；
(2) by sediment by drying, preheating and calcining obtain calcined product, alkali-activator are added into calcined product,
It is 200~300 mesh that partial size is ground to after mixing, and admixture is made；Wherein, the calcination temperature is 500 DEG C, and calcination time is
1% that quality is calcined product quality is added in 20min, the alkali-activator；
Step 2, prepared by coal gangue concrete:
It (1) is v1:v2:v3:v4:v5:v6=22%:2%:14%:18%:22%:22% by percent by volume, it is standby
Material；
(2) it is once stirred, detailed process are as follows: by 22% gangue aggregate, 2% admixture, 7% cementitious material, 9%
Mixing water mixing, stirs evenly, and forms primary stirring material；
(3) 22% natural coarse aggregate, 22% natural fine aggregate, 7% cementitious material and 9% is added into primary stirring material
Mixing water carries out secondary agitation, and coal gangue concrete is made after mixing evenly, wherein the coal shale in brick making adds weight
Amount≤coal gangue concrete total weight 30%, remaining composition are prepared using conventional concrete preparation method, so that preparation is mixed
Solidifying soil keeps good mechanical property.
As shown in Fig. 2, the coal gangue concrete of preparation is poured into as required in already fixed round steel pipe, circle is formed
Shape concrete filled steel tubular member, including coal gangue concrete 1, coal shale in brick making 2, steel pipe 3, since steel pipe can play the work of mold
With, therefore the process that demoulding can be saved, while the minimum of round steel pipe, rectangular steel pipe and oval steel pipe pours width and is all larger than coal
Twice (i.e. 120mm) of the large-particle-size aggregate in spoil material can avoid that the non-uniform phenomenon of concreting occurs.
Embodiment 2
A kind of coal gangue concrete, component include coal shale in brick making and concrete material；Wherein, the coal shale in brick making
Including component are as follows: gangue aggregate and admixture, the concrete material include cementitious material, mixing water, natural thick bone
Material and natural fine aggregate, each component percent by volume are v1:v2:v3:v4:v5:v6=25%:2%:11%:12%:25%:
25%；Wherein: the v1 is gangue aggregate volume, and v2 is admixture volume, and v3 is cementitious material volume, and v4 is that stirring is used
Water volume, v5 are natural coarse aggregate volume, and v6 is natural fine aggregate volume；
The gangue aggregate size is 0.075~60mm；
The cementitious material is cement；
The natural coarse aggregate is rubble or cobble, and material is andesite or monzonite etc.；
The natural fine aggregate is river sand or Machine-made Sand；
The concrete material uses conventional concrete preparation method, is mixed according to the above ratio by cement, sand, stone, water
It is uniformly formulated, the coal shale in brick making addition weight is the 30% of coal gangue concrete total weight, remaining composition is mixed
Solidifying soil material.
The coal gangue concrete compression strength is C20~C80, i.e. cubic compressive strength meets 20~80MPa, is resisted
Shock stability, contraction, Creep Characteristics and same intensity normal concrete similar performance.
The preparation method of the coal gangue concrete, comprising the following steps:
Step 1, prepared by coal shale in brick making:
(1) gangue is crushed, obtains gangue material, passed through after being rinsed drying to the gangue material
Cross pre-wetted treatment, the specific process is as follows: take rinse it is dry after gangue material, be added prewet with water thereto, make to prewet
It is immersed with water, it is 0.7 × (m that quality, which is added, with water in described prewetting0˙w0), make it is dry after gangue material to reach 70% full
And state；Wherein, m0For gangue quality of material, w after drying0For the water absorption rate of gangue material after drying；Obtain partial size <
The sediment and partial size of 0.075mm are the gangue aggregate of 0.075~60mm；
(2) by sediment by drying, preheating and calcining obtain calcined product, alkali-activator are added into calcined product,
It is 200~300 mesh that partial size is ground to after mixing, and admixture is made；Wherein, the calcination temperature is 500 DEG C, and calcination time is
1% that quality is calcined product quality is added in 20min, the alkali-activator；
Step 2, prepared by coal gangue concrete:
It (1) is v1:v2:v3:v4:v5:v6=25%:2%:11%:12%:25%:25% by percent by volume, it is standby
Material；
(2) it is once stirred, detailed process are as follows: by 25% gangue aggregate, 2% admixture, 5.5% cementitious material,
The mixing of 6% mixing water, stirs evenly, and forms primary stirring material；
(3) be added 25% natural coarse aggregate into primary stirring material, 25% natural fine aggregate, 5.5% cementitious material and
6% mixing water carries out secondary agitation, and coal gangue concrete is made after mixing evenly, wherein the coal shale in brick making addition
Weight≤coal gangue concrete total weight 30%, remaining composition are prepared using conventional concrete preparation method, so that preparation
Concrete keeps good mechanical property.
As shown in figure 3, the coal gangue concrete of preparation is poured into as required in already fixed rectangular steel pipe, formed
Rectangular steel pipe coal gangue concrete component, including coal gangue concrete 1, coal shale in brick making 2, steel pipe 3；
As shown in figure 4, the coal gangue concrete of preparation can also be poured into already fixed oval steel as requested
Guan Zhong forms elliptic steel pipe coal gangue concrete component, forms circular steel tube concrete component, including coal gangue concrete 1, coal
Spoil raw material 2, steel pipe 3.
Claims (8)
1. a kind of coal gangue concrete, which is characterized in that component includes coal shale in brick making and concrete material；Wherein, described
Coal shale in brick making includes component are as follows: gangue aggregate and admixture, the concrete material include cementitious material, and stirring is used
Water, natural coarse aggregate and natural fine aggregate, each component percent by volume are v1:v2:v3:v4:v5:v6=(22%~25%):
2%:(11%~14%): (12%~18%): (22%~25%): (22%~25%)；Wherein: the v1 is gangue
Aggregate volume, v2 are admixture volume, and v3 is cementitious material volume, and v4 is mixing water volume, and v5 is natural coarse aggregate volume,
V6 is natural fine aggregate volume；
The coal shale in brick making adds weight≤coal gangue concrete total weight 30%, remaining composition is concrete material.
2. coal gangue concrete according to claim 1, which is characterized in that the coal gangue concrete sand coarse aggregate ratio >=
0.45。
3. coal gangue concrete according to claim 1, which is characterized in that the gangue aggregate size is 0.075
~60mm.
4. coal gangue concrete according to claim 1, which is characterized in that the natural coarse aggregate is rubble or ovum
Stone, material are andesite or monzonite；The natural fine aggregate is river sand or Machine-made Sand.
5. coal gangue concrete according to claim 1, which is characterized in that the coal gangue concrete compression strength is
C20~C80, i.e. cubic compressive strength meet 20~80MPa.
6. the preparation method of coal gangue concrete described in claim 1, which comprises the following steps:
Step 1, prepared by coal shale in brick making:
(1) gangue is crushed, obtains gangue material, drying is rinsed to the gangue material, is sunk
Starch and gangue aggregate, the precipitate particle sizes < 0.075mm, the gangue aggregate size are 0.075~60mm；
(2) by sediment by drying, preheating and calcining obtain calcined product, alkali-activator are added into calcined product, mix
After be ground to partial size be 200~300 mesh, be made admixture；Wherein, the calcination temperature is 500 DEG C, and calcination time is
1% that quality is calcined product quality is added in 20min, the alkali-activator；
Step 2, prepared by coal gangue concrete:
(1) it is v1:v2:v3:v4:v5:v6=(22%~25%): 2%:(11%~14% by percent by volume): (12%~
18%): (22%~25%): (22%~25%), stock；
(2) it is once stirred, detailed process are as follows: by v1 gangue aggregate, v2 admixture, 0.5v3 cementitious material, 0.5v4 stirred
It mixes and is mixed with water, stirred evenly, form primary stirring material；
(3) v5 natural coarse aggregate, the natural fine aggregate of v6,0.5v3 cementitious material and 0.5v4 stirring are added into primary stirring material
With water, secondary agitation is carried out, coal gangue concrete is made after mixing evenly, wherein the coal shale in brick making addition weight≤
The 30% of coal gangue concrete total weight.
7. the preparation method of coal gangue concrete according to claim 6, which is characterized in that in the step 1 (1),
Gangue material rinses after drying by pre-wetted treatment, the pre-wetted treatment process are as follows: takes the gangue object after rinsing drying
Material is added prewets with water thereto, and making to prewet is immersed with water, and it is 0.7 × (m that quality, which is added, with water in described prewetting0·
w0), wherein m0For gangue quality of material, w after drying0For the water absorption rate of gangue material after drying.
8. coal gangue concrete described in claim 1 is applied to concrete filled steel tubular member preparation technical field, specifically, by institute
The coal gangue concrete stated, which is poured into steel pipe, is made concrete filled steel tubular member, wherein the steel tube section shape be it is round,
Rectangle or ellipse.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112632814A (en) * | 2020-12-04 | 2021-04-09 | 西安理工大学 | Method for constructing three-dimensional model of recycled concrete based on ellipsoid random aggregate |
| CN113716917A (en) * | 2021-09-08 | 2021-11-30 | 河北建筑工程学院 | Preparation method of coal gangue coarse aggregate concrete |
| CN115028383A (en) * | 2022-06-07 | 2022-09-09 | 兖煤蓝天清洁能源有限公司 | Coal-based gangue resource utilization method based on gradient utilization concept |
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Application publication date: 20181221 |