CN102815909B - Gangue ready mixed mortar and preparation method thereof - Google Patents
Gangue ready mixed mortar and preparation method thereof Download PDFInfo
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- CN102815909B CN102815909B CN201210341793.4A CN201210341793A CN102815909B CN 102815909 B CN102815909 B CN 102815909B CN 201210341793 A CN201210341793 A CN 201210341793A CN 102815909 B CN102815909 B CN 102815909B
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- coal gangue
- gangue
- mortar
- mixed mortar
- ready mixed
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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 discloses gangue ready mixed mortar and a preparation method of the gangue ready mixed mortar. The gangue ready mixed mortar is formed by mixing gangue fine powder, silicate cement clinker, silica fume, a composite fine aggregate, a composite exciter, an inner curing agent and gypsum mixing control agent according to proper mass percentages through a certain process, wherein the content of the gangue fine powder is 5 to 20 percent; and the content of the gangue fine aggregate is 15 to 60 percent. The physical performance indexes such as strength, viscosity, water-retaining property, condensation time and stretching adhesive strength of the gangue ready mixed mortar can meet the standard requirements in a building material industry, and demands for masonry and wall surface plastering can be met. With the adoption of the gangue ready mixed mortar, the problems of long-time accumulation of gangue and environment pollution are solved, and the gangue is turned into wealth; the industrial policies in energy conservation, emission reduction and environment protection in China are met; and the gangue ready mixed mortar is favorable for popularization and application.
Description
Technical field
The invention belongs to building material technical field, be specially a kind of coal gangue premixing mortar and preparation method thereof.
Background technology
Premixing mortar refers to by specialized manufacturer production, for the various mortar mixtures in construction project, is a kind of New Building Materials that China's developed recently gets up.At present, on-the-spot mixing mortar demonstrates its intrinsic defect day by day, and as mortar quality instability, waste of material is large, mortar kind is single, civilized construction degree is low, makes construction engineering quality be difficult to be guaranteed, and produces severe contamination to urban environment simultaneously.Therefore, ministries and commissions of the Ministry of Construction etc. six combine and have issued " notice about forbidding Site mortar working at urban time limit ", require that 127 cities forbade using cement mixing mortar at the construction field (site) in July, 2009, and have promulgated corresponding standard.With regard to mortar enterprise of China, mainly there is production unit simple and crude, product price is higher, the problems such as professional level is low, mortar function singleness, and it is imperative for especially reducing product price and improving functionalization.
Coal gangue is the rock that the carbon content be mixed in coal seam is lower, harder than coal, the solid waste general name of discharging in coal separation and coal washing process, it is one of maximum industrial solid castoff of China's quantity discharged, annual coal gangue quantity discharged accounts for 10% to 15% of coal production then, only 2010 annual emissions reach 3.8 hundred million tons, coal gangue hill reaches more than 1500, only more than 50 hundred million tons at present, takes up an area 1.3 × 10
8cm
2above.A large amount of coal gangue stacks not only land occupation for a long time, and causes environmental pollution.Reduce discharging coal gangue, make that it is innoxious, resource utilization is imperative.Although coal gangue utilization ratio reaches more than 70%, utilize added value very low, build up fields as reclaimed and build the road and underground filling, colliery wastes brick, low calorie fuelss etc., in building material industry, coal gangue is used for brickmaking and accounts for more than 90%, and other are for cement mixture, concrete admixture, aggregate etc.With other solid waste as compared with flyash, affecting coal gangue in the key that building material industry effectively utilizes is that the activity of coal gangue is not high, and the activity how improving coal gangue is the bottleneck that restriction coal gangue utilizes.Existing major way is high-temperature calcination and chemi-excitation.Prepare in premixing mortar (or dry-mix) utilizing coal gangue, patent relevant at home has 200910085856.2 and 200810246222.6, the former does fine aggregate with coal gangue, existing problems utility value is low, the latter is used as blended material and fine aggregate coal gangue, wherein doing blended material part needs through 750-850 DEG C of calcination processing, and energy consumption and equipment cost greatly, make this technology popularization difficulty large.
Therefore, how reasonably to excite the activity of coal gangue, improve its utility value and economic benefit, make it have market application foreground widely, there is larger practical significance.
Summary of the invention
In order to overcome above-mentioned deficiency of the prior art, the present invention proposes a kind of take coal gangue as the preparation method of the coal gangue premixing mortar of raw material, the physical performance index such as intensity, denseness, water-retentivity, time of coagulation, tensile bond strength of coal gangue premixing mortar all meets building material industry standard requirement, can meet and build by laying bricks or stones and wall plastering needs.This invention is not only conducive to solving coal gangue and piles up for a long time and to problems such as the pollutions of environment, coal gangue turned waste into wealth, meets the industry policy of national energy-saving, reduction of discharging, protection of the environment, be conducive to applying.
The object of the present invention is achieved like this:
A kind of coal gangue premixing mortar, it is characterized in that, combined according to mass percent by following raw materials according: curing agent, 0.5-4.5% compound activator, 0.3-1.5% gypsum adjustable solidification agent in the standard quartz sand of 5%-20% coal gangue fine powder, 10-30% Portland clinker, 15-60% coal gangue fine aggregate, 15-60%, 2% silicon ash, 0.1-1% high efficiency water reducing agent, 0.01-0.1%;
Described compound activator is made up of terra alba and calcium hydroxide;
Described gypsum adjustable solidification agent is terra alba or calcium sulphate hemihydrate;
Described high efficiency water reducing agent is how to be FDN or polycarboxylic acid series PC, solid powder;
Described interior curing agent is polyacrylamide or methyl cellulose ether;
Described standard quartz sand is 2 district's medium sands;
Described silicon ash median size is at 0.15-0.20 μm, and specific surface area is 15000 ~ 20000m
2/ kg;
Coal gangue premixing mortar, its concrete preparation method's step is as follows:
(1) be divided into two portions after first coal gangue being broken into particulate in crusher, part I requires to carry out classification, as coal gangue fine aggregate according to 2 district's sand; Grinding is to requiring fineness in ball mill for part II, and specific surface area controls at 350-450m
2/ kg;
(2) in ball mill, grinding is to requirement fineness by usage ratio for Portland clinker and gypsum adjustable solidification agent, and specific surface area controls at 350-450m
2/ kg;
(3) levigate coal gangue fine powder, cement clinker, compound activator, high efficiency water reducing agent, interior curing agent, coal gangue fine aggregate, quartz sand are mixed according to the above ratio, make coal gangue cement mortar.
positive beneficial effect:coal gangue fine powder is a kind of gelling material in cement, there is certain hydration activity, but this activity needs just can show under exciting agent existence condition, although hydrated cementitious can provide calcium hydroxide to excite, but this excitation is limited, need to mix exciting agent again, as the component such as calcium hydroxide, calcium sulfate, make the aquation of coal gangue not exclusively depend on quantity and the speed of hydrated cementitious generation calcium hydroxide.
When interior curing agent is mainly in order to make mortar at outside water scarcity or be not easy to maintenance, the moisture of own absorption is relied on to discharge gradually, keep the humidity that mortar is inner suitable, in order to avoid temperature-caused shrinkage, large and some materials that dehydration is slower of a little water regain of main use, as polypropylene hydramine, methyl cellulose ether etc., the good polypropylene hydramine of effect that the present invention adopts.
High efficiency water reducing agent, mainly under the prerequisite ensureing normal construction performance, for reducing the amount of water of mortar, thus improves intensity and the weather resistance of mortar.At present conventional how based water reducer and polycarboxylate water-reducer, the present invention adopts the good polycarboxylate water-reducer of effect.
Gypsum adjustable solidification agent is for regulating the time of coagulation of mortar.Within the scope of suitable volume, the hydration rate of cement and coal gangue can be regulated, thus have adjusted the time of coagulation of coal gangue premixing mortar, generally with dihydrate gypsum or semi-hydrated gypsum.
Because the hardness of coal gangue, cement clinker, exciting agent is different, reach regulation fineness required time different, require separately grinding.
Coal gangue premixing mortar prepared by the present invention has following advantage:
(1) adopt compound activator to carry out activity excitation to coal gangue, make its latent hydraulicity obtain performance to a certain extent, but only by chemically sensitized method, coal gangue general activity is on the low side.Therefore, the present invention requires lower feature by mortar for strength of cement, and the active admixture of coal gangue as mortar is used, avoids the active effect because excessively pursuing coal gangue and the cost increase that brings; Utilize again coal gangue to have the feature of higher-strength simultaneously, reach the abundant recycling of coal gangue.
(2) physical performance index such as denseness, water-retentivity, time of coagulation, tensile bond strength of coal gangue premixing mortar all meets JG/T230-2007 requirement.When coal gangue fine powder volume is at 5-10%, premixing mortar strength grade reaches 20; When coal gangue fine powder volume is at 10-15%, premixing mortar strength grade reaches 15; When coal gangue fine powder volume is at 15-20%, premixing mortar strength grade reaches 10.
(3) not only the general property of coal gangue premixing mortar meets the demands, and impermeability, cohesiveness, splitting resistance etc. are good, can as uses such as masonry mortar, motar, ground mortars, have that steady quality, construction are simple, the feature of low environmental load simultaneously, meet China's strategy of sustainable development.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described:
A kind of coal gangue premixing mortar, it is characterized in that, combined according to mass percent by following raw materials according: curing agent, 0.5-4.5% compound activator, 0.3-1.5% gypsum adjustable solidification agent in the standard quartz sand of 5%-20% coal gangue fine powder, 10-30% Portland clinker, 15-60% coal gangue fine aggregate, 15-60%, 2% silicon ash, 0.1-1% high efficiency water reducing agent, 0.01-0.1%;
Described compound activator is made up of terra alba and calcium hydroxide;
Described gypsum adjustable solidification agent is terra alba or calcium sulphate hemihydrate;
Described high efficiency water reducing agent is how to be FDN or polycarboxylic acid series PC, solid powder;
Described interior curing agent is polyacrylamide or methyl cellulose ether;
Described standard quartz sand is 2 district's medium sands;
Described silicon ash median size is at 0.15-0.20 μm, and specific surface area is 15000 ~ 20000m
2/ kg;
Coal gangue premixing mortar, its concrete preparation method's step is as follows:
(1) be divided into two portions after first coal gangue being broken into particulate in crusher, part I requires to carry out classification, as coal gangue fine aggregate according to 2 district's sand; Grinding is to requiring fineness in ball mill for part II, and specific surface area controls at 350-450m
2/ kg;
(2) in ball mill, grinding is to requirement fineness by usage ratio for Portland clinker and gypsum adjustable solidification agent, and specific surface area controls at 350-450m
2/ kg;
(3) levigate coal gangue fine powder, cement clinker, compound activator, high efficiency water reducing agent, interior curing agent, coal gangue fine aggregate, quartz sand are mixed according to the above ratio, make coal gangue cement mortar.
embodiment 1
By various component is ground into fine powder as stated above, then mix in following ratio mass percent.
Coal gangue fine powder 5.0%
Portland clinker 30.4%
Gypsum adjustable solidification agent 1.0%
Compound activator 0.5%
Silicon ash 2.0%
High efficiency water reducing agent 1.0%
Interior curing agent 0.1 %
Coal gangue fine aggregate 45.0%
Quartz sand 15.0%
The Main physical performance index recorded are: time of coagulation 4h, 28 days intensity 26.6MPa, water-retentivity 95%, 14 days cohesive strength 1.64MPa, seepage-resistant grade is P6, and mortar expansion rate is 1.5 × 10
-2%.
embodiment 2
By various component is ground into fine powder as stated above, then mix in following ratio mass percent.
Coal gangue fine powder 10.0%
Portland clinker 25.9%
Silicon ash 2.0%
Gypsum adjustable solidification agent 1.0%
Compound activator 2.0%
High efficiency water reducing agent 1.0%
Interior curing agent 0.1 %
Coal gangue fine aggregate 45.0%
Quartz sand 15.0%
The Main physical performance index recorded are: time of coagulation 4h, 28 days intensity 20.1MPa, water-retentivity 92%, 14 days cohesive strength 1.20MPa, seepage-resistant grade is P6, and rate of expansion is 1.1 × 10
-2%.
embodiment 3
By various component is ground into fine powder as stated above, then mix in following ratio mass percent.
Coal gangue fine powder 15.0%
Portland clinker 19.9%
Silicon ash 2.0%
Gypsum adjustable solidification agent 1.0%
Compound activator 3.0%
High efficiency water reducing agent 1.0%
Interior curing agent 0.1 %
Coal gangue fine aggregate 45.0%
Quartz sand 15.0%
The Main physical performance index recorded are: time of coagulation 4h, 28 days intensity 17.6MPa, water-retentivity 90%, 14 days cohesive strength 0.82MPa, seepage-resistant grade is P6, and rate of expansion is 0.9 × 10
-2%.
Coal gangue premixing mortar prepared by the present invention has following advantage:
(1) adopt compound activator to carry out activity excitation to coal gangue, make its latent hydraulicity obtain performance to a certain extent, but only by chemically sensitized method, coal gangue general activity is on the low side.Therefore, the present invention requires lower feature by mortar for strength of cement, and the active admixture of coal gangue as mortar is used, avoids the active effect because excessively pursuing coal gangue and the cost increase that brings; Utilize again coal gangue to have the feature of higher-strength simultaneously, reach the abundant recycling of coal gangue.
(2) physical performance index such as denseness, water-retentivity, time of coagulation, tensile bond strength of coal gangue premixing mortar all meets JG/T230-2007 requirement.When coal gangue fine powder volume is at 5-10%, premixing mortar strength grade reaches 20; When coal gangue fine powder volume is at 10-15%, premixing mortar strength grade reaches 15; When coal gangue fine powder volume is at 15-20%, premixing mortar strength grade reaches 10.
(3) not only the general property of coal gangue premixing mortar meets the demands, and impermeability, cohesiveness, splitting resistance etc. are good, can as uses such as masonry mortar, motar, ground mortars, have that steady quality, construction are simple, the feature of low environmental load simultaneously, meet China's strategy of sustainable development.
Above embodiment is only for illustration of the preferred embodiment of the present invention; but the present invention is not limited to above-mentioned embodiment; in the ken that described exercising ordinary skill possesses; the any amendment done within the spirit and principles in the present invention, equivalent to substitute and improvement etc., it all should be encompassed within the technical scheme scope of request of the present invention protection.
Claims (5)
1. a coal gangue premixing mortar, it is characterized in that, combined according to mass percent by following raw materials according: curing agent, 0.5-4.5% compound activator, 0.3-1.5% gypsum adjustable solidification agent in the standard quartz sand of 5%-20% coal gangue fine powder, 10-30% Portland clinker, 15-60% coal gangue fine aggregate, 15-60%, 2% silicon ash, 0.1-1% high efficiency water reducing agent, 0.01-0.1%;
Described coal gangue premixing mortar, its concrete preparation method's step is as follows:
(1) be divided into two portions after first coal gangue being broken into particulate in crusher, part I requires to carry out classification, as coal gangue fine aggregate according to 2 district's sand; Grinding is to requiring fineness in ball mill for part II, and specific surface area controls at 350-450m
2/ kg;
(2) in ball mill, grinding is to requirement fineness by usage ratio for Portland clinker and gypsum adjustable solidification agent, and specific surface area controls at 350-450m
2/ kg;
(3) levigate coal gangue fine powder, cement clinker, compound activator, high efficiency water reducing agent, interior curing agent, coal gangue fine aggregate, quartz sand, silicon ash and gypsum adjustable solidification agent are mixed according to the above ratio, make coal gangue cement mortar;
Described compound activator is made up of terra alba and calcium hydroxide.
2., according to the coal gangue premixing mortar that right 1 requires, it is characterized in that: described high efficiency water reducing agent is naphthalene system FDN or polycarboxylic acid series PC, pressed powder.
3., according to the coal gangue premixing mortar that right 1 requires, it is characterized in that: described interior curing agent is polyacrylamide or methyl cellulose ether.
4., according to the coal gangue premixing mortar that right 1 requires, it is characterized in that: described standard quartz sand is 2 district's medium sands.
5. according to the coal gangue premixing mortar that right 1 requires, it is characterized in that: described silicon ash median size is at 0.15-0.20 μm, and specific surface area is 15000 ~ 20000m
2/ kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210341793.4A CN102815909B (en) | 2012-09-17 | 2012-09-17 | Gangue ready mixed mortar and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210341793.4A CN102815909B (en) | 2012-09-17 | 2012-09-17 | Gangue ready mixed mortar and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102815909A CN102815909A (en) | 2012-12-12 |
| CN102815909B true CN102815909B (en) | 2015-03-11 |
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Families Citing this family (8)
| 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 |
| CN105174834A (en) * | 2015-08-25 | 2015-12-23 | 西安建筑科技大学 | Coal-gangue lightweight aggregate concrete |
| CN110482888A (en) * | 2019-09-18 | 2019-11-22 | 贵州中能高新材料有限公司 | A method of utilizing waste standby gypsum based self-leveling mortar made of stones |
| CN112537917B (en) * | 2020-12-19 | 2022-06-07 | 湖北工业大学 | Application method of support mortar coagulant prepared from coal gangue |
| CN113582625A (en) * | 2021-08-24 | 2021-11-02 | 江苏金立方环保科技有限公司 | Premixed mortar suitable for plastering various walls and preparation method thereof |
| CN114276102A (en) * | 2021-10-31 | 2022-04-05 | 平安电气股份有限公司 | Coal gangue modified bottom layer plastering gypsum and preparation method thereof |
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546410A (en) * | 2003-12-01 | 2004-11-17 | 同济大学 | Composite cement with large amount of coal gangue and its preparation method |
| CN101445347A (en) * | 2008-12-30 | 2009-06-03 | 淮南东辰集团有限责任公司 | Dry-mixed mortar with coal gangue, and preparation method thereof |
| CN102503318B (en) * | 2011-10-24 | 2013-11-06 | 沈阳建筑大学 | High bending strength cement-based grouting material |
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Legal Events
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| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ma Xianwei Inventor after: Niu Jishou Inventor after: Zhu Kai Inventor after: Yao Liyang Inventor after: Gao Wenying Inventor before: Ma Xianwei Inventor before: Niu Jishou Inventor before: Zhang Guoqiang Inventor before: Zhu Kai Inventor before: Yao Liyang |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: MA XIANWEI NIU JISHOU ZHANG GUOQIANG ZHU KAI YAO LIYANG TO: MA XIANWEI NIU JISHOU ZHU KAI YAO LIYANG GAO WENYING |
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Granted publication date: 20150311 Termination date: 20170917 |