CN106242389A - A kind of method utilizing coffee grounds to prepare colliery residual stope filling mastic - Google Patents
A kind of method utilizing coffee grounds to prepare colliery residual stope filling mastic Download PDFInfo
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- CN106242389A CN106242389A CN201610565591.6A CN201610565591A CN106242389A CN 106242389 A CN106242389 A CN 106242389A CN 201610565591 A CN201610565591 A CN 201610565591A CN 106242389 A CN106242389 A CN 106242389A
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- China
- Prior art keywords
- coffee grounds
- colliery
- stope filling
- filling mastic
- residual
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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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
Abstract
The invention discloses a kind of method utilizing coffee grounds to prepare colliery residual stope filling mastic.The method is on the basis of test coffee grounds moisture content, particle diameter, infiltration coefficient and the coefficient of expansion, obtained preparing the superfine powder of colliery residual stope filling mastic by ball milling, then gangue crushed and sieved, coarse aggregate and the fine aggregate of colliery residual stope filling mastic are obtained preparing, finally superfine powder solution is neutralized, and it is aided with water, water reducer, early strength agent, extender and retarder, mix homogeneously, prepare the fill paste in residual exploiting field, colliery.The present invention not only solves residual exploiting field paste filling material and carrys out the problem that source range is little, can scientifically prevent and control the generation of residual exploiting field dynamic disaster, ensure sustainable development, and rationally make use of the coffee grounds of extensively accumulation efficiently, alleviate the contamination hazard to surrounding.
Description
Technical field
The present invention relates to colliery cemented filling material technical field, especially relating to one, to utilize coffee grounds to prepare colliery residual
The method of stope filling mastic, is primarily adapted for use in the improvement in the residual exploiting field of coal mine underground.
Background technology
Being dug coyoting etc. by the private of the coal pit that occupies a narrow space in advance to affect, area is deposited in the tax in residual exploiting field, China underground to be increased year by year.Ground
Under residual exploiting field widely distributed easy initiation earth surface cracks and depression, abandon and adopt coal resources spontaneous fire, release of toxic gas etc.
Disaster, and then have a strong impact on the stability of surface buildings, water body and railway etc..Meanwhile, residual exploiting field, underground leave over coal column group indulge
Traversed by is wrong, and it is in factors such as long-term concentrfated load, adjacent coal seam mining influence, water in gob area, spontaneous fire and stratum high-temperatures
Coupling under, wall caving inbreak can from outward appearance to inner essence occur, and then occur loaded area to reduce and support strength reduction etc. is existing
As, and cause fall damage.When the shock wave transfer that the generation of coal column instantaneous unstability left over by stope is diffused into neighbouring coal column, may
Cause stope to leave over chain type unstability and the destruction of coal column, and then cause previous power disaster, threaten the security of the lives and property of the masses.
In recent years, the improvement in residual exploiting field, underground increasingly becomes numerous technical staff and researcher's focus of attention.Cream
Body filling technique is the Important Action rationally administering residual exploiting field, and it can not only make full use of gangue, flyash and discarded coagulation
The deposits such as soil, and can scientifically prevent and control the generation of residual exploiting field dynamic disaster, and ensure sustainable development.So
And, due to the tax in residual exploiting field, underground, to deposit area relatively big, in addition gangue, flyash and discarded concrete to carry out source range little, its
Quantitatively it is difficult to meet paste body filling and administers the demand in the residual exploiting field of coal mine underground.Therefore, need that a kind of cost is relatively low, source model badly
Enclose extensively and meet the residual exploiting field paste filling material of requirement of strength and conveying requirement to solve the problems referred to above.
Coffee is one of big beverage in the world three.Coffee can produce substantial amounts of slag in preparation process, and its weight accounts for coffee
The 2/3 of dry bean.At present, the coffee grounds of China is taken as garbage to abandon mostly, causes the stacking of ground a large amount of " brown rubbish ",
This not only occupies a large amount of valuable land resource, consumes too much stacking place and builds and administration fee use, and easily makes
Soil and surrounding etc. pollute in pairs.Along with coffee grounds stacks highlighting of the problem such as place and environmental pollution thereof, coffee
The recycling of slag becomes the problem needing solution badly.
To sum up, need a kind of residual exploiting field paste filling material that can solve of searching badly and carry out the problem that source range is little, again can be reasonable
The method effectively utilizing extensively accumulation coffee grounds, and then scientifically prevent and avoid the generation of residual exploiting field dynamic disaster, and delay
Subtract the environmental protection pressure of offal treatment during Coffee Production.
Summary of the invention
It is desirable to provide a kind of method utilizing coffee grounds to prepare colliery residual stope filling mastic, not only solve residual
Exploiting field paste filling material carrys out the problem that source range is little, can scientifically prevent and control the generation of residual exploiting field dynamic disaster, guarantor
Barrier sustainable development, and rationally make use of the coffee grounds of extensively accumulation efficiently, alleviate the contamination hazard to surrounding.
The present invention is achieved by the following technical solutions:
A kind of method utilizing coffee grounds to prepare colliery residual stope filling mastic, at test coffee grounds moisture content, particle diameter, oozes
On the basis of saturating coefficient and the coefficient of expansion, obtain preparing the superfine powder of colliery residual stope filling mastic by ball milling, then
Gangue crushed and has been sieved, having been obtained preparing coarse aggregate and the fine aggregate of colliery residual stope filling mastic, the most right
Superfine powder solution is neutralized, and is aided with water, water reducer, early strength agent, extender and retarder, mix homogeneously, is prepared into
The fill paste in residual exploiting field to colliery.Described technical scheme specifically follows the steps below:
(1) industrial waste coffee grounds is collected, sorting cleaning impurity and the composition possessing radioactivity, heavy metal pollution；
(2) the test moisture content of coffee grounds, particle diameter, infiltration coefficient and the coefficient of expansion, choose the coffee meeting following requirement
Slag:
Moisture content is 10% ~ 80%, particle diameter≤20mm, and infiltration coefficient is 0.9 × 10-5cm/sec~3.6×10-5Cm/sec,
The coefficient of expansion is 3.0 × 10-6~3.6×10-5；
(3) coffee grounds that step (2) is chosen is carried out ball milling, obtain preparing the superfine powder of colliery residual stope filling mastic；
(4) utilize jaw crusher that gangue is crushed, and the coal gangue particle that particle diameter is more than 15mm carries out secondary and breaks
Broken, the coal gangue particle diameter Distribution making screening obtain is respectively less than 15mm；
(5) by the vibrosieve that mesh is 5mm and 15mm, gangue broken in step (4) is sieved respectively, prepared
The fine aggregate of colliery residual stope filling mastic and coarse aggregate；
(6) utilizing superfine powder prepared by step (3), preparation mass concentration is the coffee grounds aqueous solution of 60%, tests its pH value；
(7) in step (6), the coffee grounds solution of preparation is slowly injected into neutralizer so that it is pH=7；
(8) in the serosity that step (7) obtains, add coarse aggregate, fine aggregate and regulator, after mix homogeneously, obtain mass concentration
It it is the colliery residual stope filling mastic of 75% ~ 90%.
Preferably, in described step (3), the specific surface area of the superfine powder of preparation colliery residual stope filling mastic is more than
300m2/kg。
Preferably, in described step (5), particle diameter be the gangue of 1mm ~ 5mm be fine aggregate, particle diameter is 5mm ~ 15mm's
Gangue is coarse aggregate.
Preferably, in described step (7), neutralizer is one or more in hydrochloric acid, sulphuric acid, nitric acid or acetic acid, its
The coffee grounds erosion to level of ground water can be effectively prevented from.
Preferably, the weight proportion of each component of fill paste prepared by described step (8) is: coarse aggregate: 15% ~ 40%；
Fine aggregate: 20% ~ 30%；Superfine powder: 12% ~ 20%；Water: 27% ~ 33%；Regulator: 1% ~ 2%.
Preferably, in described step (8), regulator includes water reducer, early strength agent, extender and retarder, wherein diminishing
Melamine based water reducer or polycarboxylic acid series high efficiency water reducing agent are selected in agent, and it can be in the constant situation of residual stope filling mastic workability
Under, reduce mixing water amount and improve its strength character；Early strength agent selects calcium chloride, anhydrous sodium sulfate or triethanolamine, its energy
Enough improve the early anti pressured intension of residual stope filling mastic；Magnesium oxide selected by extender, and it can cause residual stope filling mastic
Volumetric expansion, and then produce certain prestressing force, it is achieved control shrinkage cracking；Retarder selects sodium gluconate or citric acid
Sodium, it can postpone the firm time of residual stope filling mastic.
Further, the weight proportion of each component of described regulator is: water reducer: 20% ~ 50%；Early strength agent: 10% ~ 50%；
Extender: 10% ~ 50%；Retarder: 20% ~ 50%.
Beneficial effects of the present invention:
This invention, on the basis of test coffee grounds moisture content, particle diameter, infiltration coefficient and the coefficient of expansion, is obtained by ball milling
The superfine powder of preparation colliery residual stope filling mastic, is then crushed gangue and has been sieved, obtained preparing coal
The coarse aggregate of ore deposit residual stope filling mastic and fine aggregate, finally neutralized superfine powder solution, and be aided with water, diminishing
Agent, early strength agent, extender and retarder, mix homogeneously, prepare the fill paste in residual exploiting field, colliery.The present invention not only solves
Residual exploiting field paste filling material carrys out the problem that source range is little, can scientifically prevent and control sending out of residual exploiting field dynamic disaster
Raw, guarantee sustainable development, and rationally make use of the coffee grounds of extensively accumulation efficiently, alleviate the pollution to surrounding
Harm.
Detailed description of the invention
In order to the technical goal of the present invention, feature and effect are had clearer understanding, now one is utilized coffee grounds system
The method of standby colliery residual stope filling mastic makees further details of elaboration and explanation.
Embodiment 1:
Step one, collects discarded coffee grounds, sorts despumation and possesses the composition of radioactivity, heavy metal pollution.
Step 2, the method introduced according to " centrifugal modeling method standard " (GB/T50123 1999) tests coffee grounds
Moisture content, particle diameter, infiltration coefficient and the coefficient of expansion, result shows: coffee grounds presents granular, and moisture content is 54.5%,
Grain diameter≤18mm, infiltration coefficient is 1.5 × 10-5Cm/sec, the coefficient of expansion is 6.0 × 10-6；
Step 3, uses X-ray fluorescence spectra analysis, polarographic analysis, electron probing analysis, atomic absorption spectroscopy and transmitting
The method that spectrum analysis combines is to detect the chemical composition of coffee grounds, and result shows: the content of cellulose accounts for 54.5%, and half is fine
The content of dimension element accounts for 25.1%, and the content of lignin is 14.7%.
Step 4, carries out ball milling by the above-mentioned coffee grounds chosen, and obtains preparing the micropowder of colliery residual stope filling mastic
Body, its specific surface area is 340m2/kg；
Step 5, utilizes jaw crusher to crush gangue, and the particle diameter coal gangue particle more than 15mm is carried out two
Secondary broken, the coal gangue particle particle diameter distribution making screening obtain is respectively less than 15mm；
Step 6, sieves broken gangue by the vibrosieve that mesh is 5mm and 15mm respectively, obtains preparing colliery residual
The fine aggregate of stope filling mastic and coarse aggregate, wherein the particle diameter of fine aggregate is 1mm ~ 5mm, the particle diameter of coarse aggregate be 5mm ~
15mm；
Step 7, utilizes superfine powder prepared by step 4, and preparation mass concentration is the aqueous solution of 60%, and uses pH meter to test
Its pH value, result shows: the pH value of coffee grounds solution is 8.1；
Step 8, uses acid buret, gradually injects dilute hydrochloric acid in the coffee grounds solution that step 7 obtains so that it is pH=7；
Step 9, adds coarse aggregate, fine aggregate and regulator in the superfine powder serosity that step 8 obtains, after mix homogeneously,
Obtaining the residual stope filling mastic in colliery that mass concentration is 73%, in fill paste, the weight of each component is respectively as follows: coarse aggregate
32kg, fine aggregate 20kg, superfine powder 20kg, water 27kg, polycarboxylic acid series high efficiency water reducing agent 0.20kg, anhydrous sodium sulfate
0.30kg, magnesium oxide 0.25kg, sodium gluconate 0.25kg.
The slump using slump cylinder to measure residual stope filling mastic is 16cm, divergence is 42cm, uses ICAR stream
The shear yield stress becoming the instrument residual stope filling mastic of test is 328Pa, plastic viscosity is 7.9Pa s, and aforementioned parameters is satisfied by
The requirement of colliery residual stope filling mastic mobile performance；The residual stope filling mastic utilizing the present embodiment gained prepares standard examination
Sample, uses microcomputer controlled electro-hydraulic servo universal testing machine to test residual stope filling sample at the uniaxial compressive strength of the 28th day, its
Value is 9.12MPa.To sum up, meeting transportation performance and the requirement of mechanical property of residual stope filling mastic, it can extensively be pushed away
It is widely used in the improvement in residual exploiting field, colliery.
Embodiment 2:
Step one, collects discarded coffee grounds, sorts despumation and possesses the composition of radioactivity, heavy metal pollution.
Step 2, the method introduced according to " centrifugal modeling method standard " (GB/T50123 1999) tests coffee grounds
Moisture content, particle diameter, infiltration coefficient and the coefficient of expansion, result shows: coffee grounds presents granular, and moisture content is 54.5%,
Grain diameter≤18mm, infiltration coefficient is 1.5 × 10-5Cm/sec, the coefficient of expansion is 6.0 × 10-6；
Step 3, uses X-ray fluorescence spectra analysis, polarographic analysis, electron probing analysis, atomic absorption spectroscopy and transmitting
The method that spectrum analysis combines is to detect the chemical composition of coffee grounds, and result shows: the content of cellulose accounts for 54.5%, and half is fine
The content of dimension element accounts for 25.1%, and the content of lignin is 14.7%.
Step 4, carries out ball milling by the above-mentioned coffee grounds chosen, and obtains preparing the micropowder of colliery residual stope filling mastic
Body, its specific surface area is 340m2/kg；
Step 5, utilizes jaw crusher to crush gangue, and the particle diameter coal gangue particle more than 15mm is carried out two
Secondary broken, the coal gangue particle particle diameter distribution making screening obtain is respectively less than 15mm；
Step 6, sieves broken gangue by the vibrosieve that mesh is 5mm and 15mm respectively, obtains preparing colliery residual
The fine aggregate of stope filling mastic and coarse aggregate, wherein the particle diameter of fine aggregate is 1mm ~ 5mm, the particle diameter of coarse aggregate be 5mm ~
15mm；
Step 7, utilizes superfine powder prepared by step 4, and preparation mass concentration is the aqueous solution of 60%, and uses pH meter to test
Its pH value, result shows: the pH value of coffee grounds solution is 8.1；
Step 8, uses acid buret, gradually injects dilute hydrochloric acid in the coffee grounds solution that step 7 obtains so that it is pH=7；
Step 9, adds coarse aggregate, fine aggregate and regulator in the superfine powder serosity that step 8 obtains, after mix homogeneously,
Obtaining the residual stope filling mastic in colliery that mass concentration is 70%, in fill paste, the weight of each component is respectively as follows: coarse aggregate
31kg, fine aggregate 20kg, superfine powder 18kg, water 30kg, polycarboxylic acid series high efficiency water reducing agent 0.20kg, anhydrous sodium sulfate
0.30kg, magnesium oxide 0.25kg, sodium gluconate 0.25kg.
The slump using slump cylinder to measure residual stope filling mastic is 15cm, divergence is 40cm, uses ICAR stream
The shear yield stress becoming the instrument residual stope filling mastic of test is 319Pa, plastic viscosity is 8.1Pa s, and aforementioned parameters is satisfied by
The requirement of colliery residual stope filling mastic mobile performance；The residual stope filling mastic utilizing the present embodiment gained prepares standard examination
Sample, uses microcomputer controlled electro-hydraulic servo universal testing machine to test residual stope filling sample at the uniaxial compressive strength of the 28th day, its
Value is 9.52MPa.To sum up, meeting transportation performance and the requirement of mechanical property of residual stope filling mastic, it can extensively be pushed away
It is widely used in the improvement in residual exploiting field, colliery.
Embodiment 3:
Step one, collects discarded coffee grounds, sorts despumation and possesses the composition of radioactivity, heavy metal pollution.
Step 2, the method introduced according to " centrifugal modeling method standard " (GB/T50123 1999) tests coffee grounds
Moisture content, particle diameter, infiltration coefficient and the coefficient of expansion, result shows: coffee grounds presents granular, and moisture content is 54.5%,
Grain diameter≤18mm, infiltration coefficient is 1.5 × 10-5Cm/sec, the coefficient of expansion is 6.0 × 10-6；
Step 3, uses X-ray fluorescence spectra analysis, polarographic analysis, electron probing analysis, atomic absorption spectroscopy and transmitting
The method that spectrum analysis combines is to detect the chemical composition of coffee grounds, and result shows: the content of cellulose accounts for 54.5%, and half is fine
The content of dimension element accounts for 25.1%, and the content of lignin is 14.7%.
Step 4, carries out ball milling by the above-mentioned coffee grounds chosen, and obtains preparing the micropowder of colliery residual stope filling mastic
Body, its specific surface area is 340m2/kg；
Step 5, utilizes jaw crusher to crush gangue, and the particle diameter coal gangue particle more than 15mm is carried out two
Secondary broken, the coal gangue particle particle diameter distribution making screening obtain is respectively less than 15mm；
Step 6, sieves broken gangue by the vibrosieve that mesh is 5mm and 15mm respectively, obtains preparing colliery residual
The fine aggregate of stope filling mastic and coarse aggregate, wherein the particle diameter of fine aggregate is 1mm ~ 5mm, the particle diameter of coarse aggregate be 5mm ~
15mm；
Step 7, utilizes superfine powder prepared by step 4, and preparation mass concentration is the aqueous solution of 60%, and uses pH meter to test
Its pH value, result shows: the pH value of coffee grounds solution is 8.1；
Step 8, uses acid buret, gradually injects dilute hydrochloric acid in the coffee grounds solution that step 7 obtains so that it is pH=7；
Step 9, adds coarse aggregate, fine aggregate and regulator in the superfine powder serosity that step 8 obtains, after mix homogeneously,
Obtaining the residual stope filling mastic in colliery that mass concentration is 72%, in fill paste, the weight of each component is respectively as follows: coarse aggregate
27kg, fine aggregate 30kg, superfine powder 14kg, water 28kg, polycarboxylic acid series high efficiency water reducing agent 0.20kg, anhydrous sodium sulfate
0.30kg, magnesium oxide 0.25kg, sodium gluconate 0.25kg.
The slump using slump cylinder to measure residual stope filling mastic is 17cm, divergence is 44cm, uses ICAR stream
The shear yield stress becoming the instrument residual stope filling mastic of test is 316Pa, plastic viscosity is 8.2Pa s, and aforementioned parameters is satisfied by
The requirement of colliery residual stope filling mastic mobile performance；The residual stope filling mastic utilizing the present embodiment gained prepares standard examination
Sample, uses microcomputer controlled electro-hydraulic servo universal testing machine to test residual stope filling sample at the uniaxial compressive strength of the 28th day, its
Value is 9.35MPa.To sum up, meeting transportation performance and the requirement of mechanical property of residual stope filling mastic, it can extensively be pushed away
It is widely used in the improvement in residual exploiting field, colliery.
The above is the preferred embodiment of the present invention, it is noted that without departing from technical spirit of the present invention with
Any improvement on the premise of principle, above-mentioned implementation made with polish, belong to the protection model of technical solution of the present invention
Enclose.
Claims (7)
1. one kind utilizes the method that coffee grounds prepares colliery residual stope filling mastic, it is characterised in that comprise the following steps:
(1) discarded coffee grounds is collected, sorting cleaning impurity and the composition possessing radioactivity, heavy metal pollution；
(2) the test moisture content of coffee grounds, particle diameter, infiltration coefficient and the coefficient of expansion, choose the coffee meeting following requirement
Slag:
Moisture content is 10% ~ 80%, particle diameter≤20mm, and infiltration coefficient is 0.9 × 10-5cm/sec~3.6×10-5Cm/sec, swollen
Swollen coefficient is 3.0 × 10-6~3.6×10-5；
(3) coffee grounds that step (2) is chosen is carried out ball milling, obtain preparing the superfine powder of colliery residual stope filling mastic；
(4) utilize jaw crusher that gangue is crushed so that it is particle diameter distribution is respectively less than 15mm；
(5) by the vibrosieve that mesh is 5mm and 15mm, gangue broken in step (4) is sieved respectively, prepared
The fine aggregate of colliery residual stope filling mastic and coarse aggregate；
(6) utilizing superfine powder prepared by step (3), preparation mass concentration is the coffee grounds aqueous solution of 60%, tests its pH value；
(7) in step (6), the coffee grounds solution of preparation is slowly injected into neutralizer so that it is pH=7；
(8) in the serosity that step (7) obtains, add coarse aggregate, fine aggregate and regulator, after mix homogeneously, obtain mass concentration
It it is the colliery residual stope filling mastic of 75% ~ 90%.
The method utilizing coffee grounds to prepare colliery residual stope filling mastic the most according to claim 1, it is characterised in that institute
In the step (3) stated, the specific surface area of superfine powder is more than 300m2/kg。
The method utilizing coffee grounds to prepare colliery residual stope filling mastic the most according to claim 1, it is characterised in that institute
In the step (5) stated, particle diameter be the gangue of 1mm ~ 5mm be fine aggregate, particle diameter be the gangue of 5mm ~ 15mm be coarse aggregate.
The method utilizing coffee grounds to prepare colliery residual stope filling mastic the most according to claim 1, it is characterised in that institute
In the step (7) stated, neutralizer is one or more in hydrochloric acid, sulphuric acid, nitric acid or acetic acid.
The method utilizing coffee grounds to prepare colliery residual stope filling mastic the most according to claim 1, it is characterised in that institute
In the step (8) stated, the weight proportion of each component of fill paste of preparation is: coarse aggregate: 15% ~ 40%；Fine aggregate: 20% ~ 30%；
Superfine powder: 12% ~ 20%；Water: 27% ~ 33%；Regulator: 1% ~ 2%.
The method utilizing coffee grounds to prepare colliery residual stope filling mastic the most according to claim 1, it is characterised in that institute
Stating regulator in step (8) and include water reducer, early strength agent, extender and retarder, wherein melamine based water reducer selected by water reducer
Or polycarboxylic acid series high efficiency water reducing agent, early strength agent selection calcium chloride, anhydrous sodium sulfate or triethanolamine, extender selection magnesium oxide,
Retarder selects sodium gluconate or sodium citrate.
The method utilizing coffee grounds to prepare colliery residual stope filling mastic the most according to claim 6, it is characterised in that institute
The weight proportion stating each component of regulator is: water reducer: 20% ~ 50%；Early strength agent: 10% ~ 50%；Extender: 10% ~ 50%；Slow setting
Agent: 20% ~ 50%.
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| CN201610565591.6A CN106242389A (en) | 2016-07-18 | 2016-07-18 | A kind of method utilizing coffee grounds to prepare colliery residual stope filling mastic |
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| CN201610565591.6A CN106242389A (en) | 2016-07-18 | 2016-07-18 | A kind of method utilizing coffee grounds to prepare colliery residual stope filling mastic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109608121A (en) * | 2018-11-29 | 2019-04-12 | 上海理工大学 | A kind of production method for the vegetation type sand-free coarse porous concrete concrete that coffee grounds is added |
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2016
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| JPH10236862A (en) * | 1997-02-27 | 1998-09-08 | Mitsubishi Materials Corp | Backfilling material |
| CN1454143A (en) * | 2000-08-25 | 2003-11-05 | 大谷满 | Building material formed from recycled resources and installation method thereof |
| CN103979884A (en) * | 2014-04-30 | 2014-08-13 | 太原理工大学 | Method for preparing coal mine filling paste by utilizing waste concrete |
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Non-Patent Citations (1)
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| ARUL ARULRAJAH ET AL.: "Spent coffee grounds as a non-structural embankment fill material：engineering and environmental considerations", 《JOURNAL OF CLEANER PRODUCTIO》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109608121A (en) * | 2018-11-29 | 2019-04-12 | 上海理工大学 | A kind of production method for the vegetation type sand-free coarse porous concrete concrete that coffee grounds is added |
| CN109608121B (en) * | 2018-11-29 | 2021-05-14 | 上海理工大学 | Method for preparing vegetation type non-sand macroporous concrete added with coffee grounds |
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