CN101575192A - Coal gangue cement mortar - Google Patents
Coal gangue cement mortar Download PDFInfo
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- CN101575192A CN101575192A CNA2009100858562A CN200910085856A CN101575192A CN 101575192 A CN101575192 A CN 101575192A CN A2009100858562 A CNA2009100858562 A CN A2009100858562A CN 200910085856 A CN200910085856 A CN 200910085856A CN 101575192 A CN101575192 A CN 101575192A
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- coal gangue
- fine aggregate
- gangue
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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
- 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
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a coal gangue cement mortar, belonging to the field of constructional engineering material. The coal gangue cement mortar is characterized in that the coal gangue cement mortar is prepared by mixing semi-lightweight coal gangue fine aggregates (replacing building sands), cement and water, according to the weight percentage, after 62-78% of semi-lightweight coal gangue fine aggregate, 9-20% of the cement and 13-18% of water are mixed, the mixture are poured into a mixer so as to be mixed uniformly, thus preparing the coal gangue cement mortar. The prepared coal gangue cement mortar has equivalent or higher strength compared to the cement mortar produced by building sands, has simple preparation process and low cost, solves a plurality of problems such as long-term piling of coal gangue and driving gangue, environmental pollution and the like, changes the waste coal gauge and the driving gangue into treasures, complies with the national industrial policy of energy saving, exhaust reducing and environmental protection, and is beneficial to generalization and application.
Description
Technical field
The present invention relates to a kind of coal gangue cement mortar, belong to field of constructional engineering material.
Technical background
China is coal big country, exploits on a large scale through many decades, makes the coal gangue and the digging gangue that produce in recovery process form bulk deposition, and still also discharges in continuation with annual about 100,000,000 tons quantity.As solid waste, the discharging of coal gangue and digging gangue is severe contamination coal mining ground environment on every side not only, also takies a large amount of soils, and this made the matter worse with regard to the situation of having a large population and a few land originally beyond doubt to China.Therefore, accelerate coal gangue and digging gangue comprehensive regulation speed, strengthen coal gangue and digging gangue comprehensive regulation dynamics is not only the requirement that local government improves local environment, improves people's living standard, also be central government's energy-saving and emission-reduction, make the needs of national sustainable development policy.
China has just begun one's study as far back as the fifties and has utilized coal gangue, but annual consumption is very limited; The requirement of, environmental improvement energy-saving and cost-reducing along with country begins the large-scale utilization coal gangue immediately and bakes bricks, but also only limits to the coal gangue that the unburn of thermal value is crossed, and the coal gangue and the digging gangue of spontaneous combustion seldom utilized.
Self-igniting coal gangue gathers materials and is meant a kind of industrial waste light-weight aggregate that the coal gangue of discharging in coal mining, the coal separation process forms through accumulation, spontaneous combustion, fragmentation, screening.Digging gangue is meant the rock that discharge in the colliery and is adopting the rock that collapses, the rock of working face inbreak in the air in the tunnelling process, mainly be made up of sandstone and Wingdale etc., its main component is silicates mineral such as illite and quartz, mica, feldspar.The colliery is in recovery process, and self-igniting coal gangue becomes coal gangue hill with the normal heap-shaped of digging gangue.And at present, domestic being only limited to self-igniting coal gangue than proven technique replaces building mortar to produce products such as cement, concrete, artificial light aggregate, and digging gangue goes out of use always.As: publication number be in the Chinese patent of CN1051720A please, a kind of self-igniting coal gangue mortar is disclosed, it is to adopt in the mixed mortar of cement and self-igniting coal gangue, mixes lime and is prepared from behind hydration reaction.Wherein also only be to have utilized self-igniting coal gangue.The utilization of digging gangue, particularly self-igniting coal gangue mix common the utilization with digging gangue, up to the present, and the report that does not also have this respect to use.
Along with developing rapidly of Building Trade in China, the continuous quickening of urbanization process, the demand of building sand increases year by year, and along with a large amount of exploitations, the natural sand and stone resources of China is quite deficient, and imbalance between supply and demand becomes increasingly conspicuous.How to solve the building sand problem that supply falls short of demand, also be the problem that the building trade technician presses for solution always.
Summary of the invention
Pile up the difficult problem that handle on the mountain for solving the mine of mining for a long time by self-igniting coal gangue and digging gangue, and the building sand problem that supply falls short of demand in the cement concrete industry, the object of the present invention is to provide a kind of coal gangue cement mortar that building sand is prepared from that replaces.
To achieve these goals, the present invention adopts following technical scheme: a kind of coal gangue cement mortar is mixed together by inferior light coal spoil fine aggregate, cement and water; Wherein, inferior light coal spoil fine aggregate accounts for total weight percent 62%～78%, the cement total weight percent accounts for 9%～20%, and water accounts for total weight percent 13%～18%.
Above-mentioned inferior light coal spoil fine aggregate is formed by self-igniting coal gangue fine aggregate and the digging gangue fine aggregate mixed with 4: 1～3: 1; The particle diameter of described self-igniting coal gangue fine aggregate and described digging gangue fine aggregate is 0～5mm.
Above-mentioned inferior light coal spoil fine aggregate, its fineness modulus is 3.0～1.6, tap density is 1200～1350Kg/m
3, cylindrical compress strength 〉=5MPa, water-intake rate≤10%, coefficient of softening 〉=0.8.
Above-mentioned cement selects for use in silicate cement, ordinary Portland cement or the Portland blast any, cement mark can select in 32.5 or 42.5 any for use.
Adopt coal gangue cement mortar of the present invention, its intensity is determined according to different working conditionss: wherein, the strength grade of dry mixing masonry mortar is DMM20, DMM15, DMM10, DMM7.5, DMM5.0 etc.; The strength grade of wet-mixing masonry mortar is WMM20, WMM15, WMM10, WMM7.5, WMM5.0; The strength grade of dry mixing ground mortar is DSM15, DSM20.
The present invention can substitute common building sand fully with the inferior light coal spoil fine aggregate that self-igniting coal gangue fine aggregate and digging gangue fine aggregate mix; Its product performance meet the regulation of technology of ready mixed mortar rules DGJ32/J13-2005.
Adopt technical scheme of the present invention, its beneficial effect is as follows: 1) self-igniting coal gangue and digging gangue aboundresources, the sand-cement slurry of the inferior light coal spoil fine aggregate preparation that combines with self-igniting coal gangue fine aggregate and digging gangue fine aggregate and common building are suitable substantially with the intensity of the sand-cement slurry that sand is prepared, have in addition be higher than ordinary mortar.2, preparation technology is simple, if the fine aggregate that self-igniting coal gangue and digging gangue are selected 0～5mm with crusher in crushing, screening directly and cement and water mix stirring and both can use, be one of effective way of fully utilizing of coal gangue.3, prepare sand-cement slurry with self-igniting coal gangue fine aggregate and digging gangue fine aggregate blended time light coal spoil, can utilize industrial residue in a large number, solved the problem of the land occupation of coal gangue accumulation for a long time, simultaneously coal gangue is turned waste into wealth, solved along with the building amount increases the building sand problem of shortage.4, help making full use of of solid waste resource, meet the industry policy that country is energy-conservation, reduce discharging, protect environment.
Embodiment
Coal gangue cement mortar of the present invention is by behind crushing and screening, and after choosing fineness modulus and be 3.0～1.6 inferior light coal spoil fine aggregate and cement and water mixing, stirring is prepared from; The composition of coal gangue cement mortar is: inferior light coal spoil fine aggregate is for accounting for total amount per-cent 62%～78%, and cement is for accounting for total amount per-cent 9%～20%, and water is for accounting for total amount per-cent 13%～18%.Wherein, inferior light coal spoil fine aggregate is mixed by self-igniting coal gangue fine aggregate and digging gangue fine aggregate, and wherein, self-igniting coal gangue fine aggregate and digging gangue fine aggregate ratio are 4: 1～3: 1; The particulate nominal grade of self-igniting coal gangue fine aggregate and described digging gangue fine aggregate is 0～5mm.
Cement wherein can be selected silicate cement, ordinary Portland cement, Portland blast for use, label be in 32.5 or 42.5 any.
The tap density of above-mentioned light coal spoil fine aggregate is 1200～1350Kg/m
3, cylindrical compress strength 〉=5Ma; Water-intake rate≤10%; Coefficient of softening 〉=0.8.
Concrete operation steps is as follows:
Step 1: self-igniting coal gangue and digging gangue are carried out fragmentation respectively, be that self-igniting coal gangue or digging gangue are transported in the jaw crusher hopper with shovel loader, after the fragmentation of jaw crusher difference, enter chapelet, transport to the vibratory screening apparatus of being located on the feed bin (or roller grizzly), through the vibratory screening apparatus classification, the fine aggregate of selecting the nominal grade and be 0～5mm is transported to through rotary conveyor and is stacked;
Step 2: the mixed by 4: 1～3: 1 is even as required for self-igniting coal gangue fine aggregate that step 1 is selected and digging gangue fine aggregate, and the inferior light coal spoil fine aggregate that will mix then sieves into 3.0～1.6 fineness modulus once more; Standby;
Step 3: the inferior light coal spoil fine aggregate of getting step 2 (accounts for total amount per-cent, the back all with) 62%～78%, label is that 32.5 cement raw material 9%～20% mixes the back and drops into stirrer and mixed to few 2～3 minutes with water 13%～18%, and the viscosity of the coal gangue cement mortar of making is 50～70 (mm) or 70～90 (mm).
The inferior light coal spoil fine aggregate that the present invention is used, its fineness modulus is 3.0～1.6, tap density is 1200～1350Kg/m
3, cylindrical compress strength 〉=5MPa, water-intake rate≤10%, coefficient of softening 〉=0.8.
With the inferior light coal spoil sand-cement slurry of the technology of the present invention preparation, when using in a different manner, its strength grade is respectively: dry mixing masonry mortar grade DMM20, DMM15, DMM10, DMM7.5, DMM5; Wet-mixing masonry mortar grade WMM20, WMM15, WMM10, WMM7.5, WMM5 etc., and grade DSM15, the DSM20 of dry mixing ground mortar.Meet technology of ready mixed mortar rules DGJ32/J13-2005.
Below by specific examples technical scheme of the present invention is described further:
Example 1:
Label with inferior light coal spoil fine aggregate preparation is the sand-cement slurry of WMM5, self-igniting coal gangue fine aggregate and digging gangue fine aggregate ratio are 4: 1 in every cubic metre the light coal spoil fine aggregate, and self-igniting coal gangue fine aggregate and digging gangue fine aggregate all sieve by the grain composition of the regulation of 5.1.1 in the GB/T17431.1-1998 standard.Get time light coal spoil fine aggregate (accounting for total weight percent, as follows) 78%, P.032.5 cement 9% drops into the interior stirring of stirrer and was mixed with coal gangue cement mortar in 3 minutes with after water 13% mixes.
Wherein, it is 2.0～1.6 that inferior light coal spoil fine aggregate is selected fineness modulus for use, and median size is 0.35～0.25mm, and the viscosity of the coal gangue cement mortar that is mixed with is 78, adopts the way maintenance 28 days of indoor natural curing, and mean compressive strength is 6.5MPa.
Example 2:
Sand-cement slurry with the WMM7.5 of inferior light coal spoil fine aggregate preparation, self-igniting coal gangue fine aggregate and digging gangue fine aggregate ratio are 3: 1 in every cubic metre the light coal spoil fine aggregate, and self-igniting coal gangue fine aggregate and digging gangue fine aggregate all sieve by the grain composition of the regulation of 5.1.1 in the GB/T17431.1-1998 standard; Get time light-weight aggregate (accounting for total weight percent, as follows) 75%, P.032.5 cement 12% drops into the interior stirring of stirrer and was mixed with coal gangue cement mortar in 2 minutes with after water 13% mixes.
Wherein, it is 2.2～1.6 that inferior light coal spoil fine aggregate is selected fineness modulus for use, and median size is that the viscosity of the coal gangue cement mortar that is mixed with of 0.35～0.25mm is 80, adopts the way maintenance 28 days of indoor spontaneous combustion maintenance, and mean compressive strength is 9.3MPa.
Example 3:
Sand-cement slurry with the WMM10 of inferior light coal spoil fine aggregate preparation, self-igniting coal gangue fine aggregate and digging gangue fine aggregate ratio are 3: 1 in every cubic metre the light coal spoil fine aggregate, and self-igniting coal gangue fine aggregate and digging gangue fine aggregate all sieve by the grain composition of the regulation of 5.1.1 in the GB/T17431.1-1998 standard; Get time light-weight aggregate (accounting for total weight percent, as follows) 68%, P.032.5 cement 14% drops into the interior stirring of stirrer and was mixed with coal gangue cement mortar in 2.5 minutes with after water 18% mixes.
Wherein: it is 2.5～1.6 that inferior light coal spoil fine aggregate is selected fineness modulus for use, and median size is 0.40～0.25mm, and the viscosity of the coal gangue cement mortar that is mixed with is 82, adopts the way maintenance 28 days of indoor spontaneous combustion maintenance, and mean compressive strength is 13.4MPa.
Example 4:
Sand-cement slurry with the DMM15 of inferior light coal spoil fine aggregate preparation, self-igniting coal gangue fine aggregate and digging gangue fine aggregate ratio are 3: 1 in every cubic metre the light coal spoil fine aggregate, and self-igniting coal gangue fine aggregate and digging gangue fine aggregate all sieve by the grain composition of the regulation of 5.1.1 in the GB/T17431.1-1998 standard; Get time light-weight aggregate (accounting for total weight percent, as follows) 65%, P.032.5 cement 17% is with after water 18% mixes, and stirring was mixed with coal gangue cement mortar in 2.5 minutes in the input stirrer.
Wherein, it is 3.0～2.3 that inferior light coal spoil fine aggregate is selected fineness modulus for use, and median size is that the viscosity of 0.5～0.35 coal gangue cement mortar that is mixed with is 78, adopts the way maintenance 28 days of indoor spontaneous combustion maintenance, and mean compressive strength is 15.6MPa.
Example 5:
Dry mixing ground cement mortar with the DSM20 of inferior light coal spoil fine aggregate preparation, self-igniting coal gangue fine aggregate and digging gangue fine aggregate ratio are 4: 1 in every cubic metre the light coal spoil fine aggregate, and self-igniting coal gangue fine aggregate and digging gangue fine aggregate all sieve by the grain composition of the regulation of 5.1.1 in the GB/T17431.1-1998 standard; Get time light-weight aggregate (accounting for total weight percent, as follows) 62%, P.032.5 cement 20% is with after water 18% mixes, and stirring was mixed with coal gangue cement mortar in 2 minutes in the input stirrer.
Wherein, the fineness modulus that inferior light coal spoil fine aggregate is selected for use is 2.3～3.0, and median size is 0.5～0.35mm, and the viscosity of the coal gangue cement mortar that is mixed with is 80, adopts the way maintenance 28 days of indoor spontaneous combustion maintenance, and mean compressive strength is 22.8MPa.
Example 6:
Dry mixing masonry mortar with the DMM10 of inferior light coal spoil fine aggregate preparation, self-igniting coal gangue fine aggregate and digging gangue fine aggregate ratio are 3: 1 in every cubic metre the light coal spoil fine aggregate, and self-igniting coal gangue fine aggregate and digging gangue fine aggregate all sieve by the grain composition of the regulation of 5.1.1 in the GB/T17431.1-1998 standard; Get time light fine aggregate (accounting for total weight percent, as follows) 69%, P.032.5 cement 16% is with after water 15% mixes, and stirring was mixed with coal gangue cement mortar in 3 minutes in the input stirrer.
Wherein, it is 3.0～2.3 that inferior light coal spoil fine aggregate is selected fineness modulus for use, and the averageparticle type is 0.5～0.35mm directly, and the viscosity of the coal gangue cement mortar that is mixed with is 75, adopts the way maintenance 28 days of indoor spontaneous combustion maintenance, and mean compressive strength is 13.7MPa.
The technical performance index of above-mentioned example 1～6 is the way of coal gangue cement mortar system test block (wherein every group of test block is 6) employing spontaneous combustion maintenance, then with 30 tons of universal testing machines test ultimate compression strength; Its result is as shown in table 1; The anti-freezing property test adopts-40 ℃ of cryogenic freezing cabinets to do freezing and thawing test, and test-results is as shown in table 2.
Table 1 technical performance index
The test of table 2 anti-freezing property
Above-mentioned coal gangue cement mortar, strength grade are WMM5.0, WMM7.5, WMM10, DMM10, DMM15, DSM20, all meet DGJ32/J13-2005 technology of ready mixed mortar rules.
Claims (5)
1, a kind of coal gangue cement mortar is characterized in that: it substitutes building sand by inferior light coal spoil fine aggregate and cement, water mix together; Wherein, inferior light coal spoil fine aggregate accounts for total weight percent 62%～78%, cement accounts for total weight percent 9%～20%, and water accounts for total weight percent 13%～18%.
According to the described coal gangue cement mortar of claim 1, it is characterized in that 2, every cubic metre of described light coal spoil fine aggregate is formed by self-igniting coal gangue fine aggregate and the digging gangue fine aggregate mixed with 4: 1～3: 1; The particle nominal grade of described self-igniting coal gangue fine aggregate and described digging gangue fine aggregate is 0～5mm.
According to the described coal gangue cement mortar of claim 1, it is characterized in that 3, the fineness modulus of described light coal spoil fine aggregate is 3.0～1.6, tap density is 1200～1350Kg/m
3, cylindrical compress strength 〉=5MPa, water-intake rate≤10%, coefficient of softening 〉=0.8.
4, according to the described coal gangue cement mortar of claim 1, it is characterized in that, described cement be in silicate cement, ordinary Portland cement, the Portland blast any; Its cement mark be in 32.5 or 42.5 any.
According to the arbitrary described coal gangue cement mortar of claim 1-4, it is characterized in that 5, the churning time of described coal gangue cement mortar is 2～3 minutes, its viscosity is 70～90.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100858562A CN101575192A (en) | 2009-06-03 | 2009-06-03 | Coal gangue cement mortar |
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|---|---|---|---|
| CNA2009100858562A CN101575192A (en) | 2009-06-03 | 2009-06-03 | Coal gangue cement mortar |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104446166A (en) * | 2014-08-28 | 2015-03-25 | 南通众润混凝土有限公司 | Method for preparing masonry mortar by utilizing scrap grout of concrete mixing plant |
| CN105294003A (en) * | 2014-06-27 | 2016-02-03 | 贵州中建建筑科研设计院有限公司 | Method for preparing cement mortar with gangue particles |
| CN106699078A (en) * | 2016-12-20 | 2017-05-24 | 河南工程学院 | Coal mine early strength type low-cost filling material and preparation method thereof |
| CN107891508A (en) * | 2017-11-28 | 2018-04-10 | 山西华通蓝天环保有限公司 | The preparation method and its mould of ultra-fine self-igniting coal gangue lightweight Self-insulation wall plate |
| WO2021035465A1 (en) * | 2019-08-26 | 2021-03-04 | 黄月亚 | Flame retardant dry-mixed mortar for ecological building external walls and preparation method therefor |
| CN113620682A (en) * | 2021-08-27 | 2021-11-09 | 河南同本科技有限公司 | Preparation method and application method of special rapid-setting mortar for mine |
| CN114105560A (en) * | 2021-11-24 | 2022-03-01 | 内蒙古工业大学 | Dry-mixed bonding mortar prepared from coal gangue and fly ash and preparation method thereof |
| CN115286296A (en) * | 2021-12-23 | 2022-11-04 | 昆明理工大学 | Dry-mixed mortar produced by using high-calcium coal gangue and production method thereof |
-
2009
- 2009-06-03 CN CNA2009100858562A patent/CN101575192A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105294003A (en) * | 2014-06-27 | 2016-02-03 | 贵州中建建筑科研设计院有限公司 | Method for preparing cement mortar with gangue particles |
| CN104446166A (en) * | 2014-08-28 | 2015-03-25 | 南通众润混凝土有限公司 | Method for preparing masonry mortar by utilizing scrap grout of concrete mixing plant |
| CN104446166B (en) * | 2014-08-28 | 2016-05-04 | 南通众润混凝土有限公司 | A kind of method of utilizing concrete mixing plant scrap grout to prepare masonry mortar |
| CN106699078A (en) * | 2016-12-20 | 2017-05-24 | 河南工程学院 | Coal mine early strength type low-cost filling material and preparation method thereof |
| CN106699078B (en) * | 2016-12-20 | 2019-04-26 | 河南工程学院 | A kind of coal mine early-strength low cost filler and its preparation method |
| CN107891508A (en) * | 2017-11-28 | 2018-04-10 | 山西华通蓝天环保有限公司 | The preparation method and its mould of ultra-fine self-igniting coal gangue lightweight Self-insulation wall plate |
| WO2021035465A1 (en) * | 2019-08-26 | 2021-03-04 | 黄月亚 | Flame retardant dry-mixed mortar for ecological building external walls and preparation method therefor |
| CN113620682A (en) * | 2021-08-27 | 2021-11-09 | 河南同本科技有限公司 | Preparation method and application method of special rapid-setting mortar for mine |
| CN114105560A (en) * | 2021-11-24 | 2022-03-01 | 内蒙古工业大学 | Dry-mixed bonding mortar prepared from coal gangue and fly ash and preparation method thereof |
| CN115286296A (en) * | 2021-12-23 | 2022-11-04 | 昆明理工大学 | Dry-mixed mortar produced by using high-calcium coal gangue and production method thereof |
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Open date: 20091111 |