CN1546410A - Composite cement with large amount of coal gangue and its preparation method - Google Patents
Composite cement with large amount of coal gangue and its preparation method Download PDFInfo
- Publication number
- CN1546410A CN1546410A CNA2003101089885A CN200310108988A CN1546410A CN 1546410 A CN1546410 A CN 1546410A CN A2003101089885 A CNA2003101089885 A CN A2003101089885A CN 200310108988 A CN200310108988 A CN 200310108988A CN 1546410 A CN1546410 A CN 1546410A
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- Prior art keywords
- coal gangue
- cement
- gypsum
- controlled
- mineral admixture
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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
-
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a large mixing amount coal gangue composite cement comprising coal gangue, silicate cement clinker aggregate, exciting agent, gypsum coagulation regulating agent, mineral admixture by right weight portion through a finite process, wherein the content of coal gangue is 20-80% wt. The composite cement according to the invention can be used for making various concrete structure, in particular mass concrete structure.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of complex cement that adopts the industrial residue of coal gangue preparation and preparation method thereof.
Background technology
China's cement annual production has reached 800,000,000 tons, and wherein the cement clinker that burns till of high temperature is about 600,000,000 tons, will be above 1,000,000,000 tons to China's cement annual requirement in 2010.Manufacture of cement consumes ample resources, the energy, serious environment pollution.China's cement performance is on the low side, causes consumption further to increase.Social development demand cement application property is better, hydration heat is lower, intensity is higher, volume is more stable, erosion resistance and weather resistance are better.In addition, China gives off more than 800,000,000 ton of all kinds of solid-state trade waste every year, and pile up like a mountain, causes the great environmental pollution and the wasting of resources.Traditional cement science is more thorough to silicate cement research, but not enough for the architectural study degree of depth that contains waste, waste residue extensive style utilization in cement is unfavorable to performance.If can utilize industrial residue to develop to have high strength, the high-performance cement of excellent durability, low environmental load three big features, will have significant social meaning and application prospect.
Coal gangue be mixed in carbon content in the coal seam lower, than the hard rock of coal, be mine and the coal washing process in the general name of discharge solid waste.In China, only 2000, the quantity discharged of coal gangue just reached 3.1 hundred million tons, accounted for about 10% of coal production then.At present, coal gangue takes up an area of about 220,000 hectares, and spontaneous combustion took place or taking place nearly 300 coal gangue hills.A large amount of coal gangues has not only taken a large amount of soils and farmland, and severe contamination environment.Reduce discharging coal gangue, and make that it is innoxious, resource utilization is imperative.At present, only have 10% in the utilization ratio of China's coal gangue, main used as the blended material of cement, concrete adulterant, aggregate etc. in cement-based material, but utilization ratio still is in lower level.Compare with other solid waste, the key that influences the industrial residue of coal gangue utilization is that the activity of coal gangue is not high, and how exciting its lateral reactivity is the bottleneck that the restriction industrial residue of coal gangue is utilized.How to utilize industrial residue of coal gangue, inspire lateral reactivity, through after certain art breading, develop big volume coal gangue complex cement, it has high strength, excellent durability, low environmental load three big features.Not only can improve ecotope, meet the social sustainable development principle, and have wide market application prospect and practical significance.
Summary of the invention
The object of the present invention is to provide complex cement of a kind of big volume industrial residue of coal gangue with high strength, high-durability, low environmental load and preparation method thereof.
The big volume coal gangue complex cement that the present invention proposes is made up of coal gangue, Portland clinker, extraordinary exciting agent, gypsum adjustable solidification agent, mineral admixture, and each weight percentages of components is:
Coal gangue 20-80%
Portland clinker 20-50%
Exciting agent 2-10%
Gypsum adjustable solidification agent 0-5%
Mineral admixture 0-30%
Above-mentioned each component total amount sum satisfies 100%.
Among the present invention, coal gangue component is a kind of main gelling material in the complex cement, have certain hydraulically active, but this activity is a potential.Because the coal gangue aquation has generated C-s-H gel and ettringite, make calcining coal gangue show certain hydraulically active, but in the hydration process of silicate cement, the calcium hydroxide that this activity of coal gangue generates by the cement clinker aquation excites and produces.In big volume coal gangue complex cement of the present invention, because cement clinker is few, the calcium hydroxide that aquation is produced is also few, and the lateral reactivity that how to inspire coal gangue is crucial.
The Portland clinker component is another kind of gelling material, and it has guaranteed intensity early stage in the cement system, and aquation produces calcium hydroxide, for coal gangue further aquation provides necessary component.Do not mix the gangue cement of extraordinary exciting agent, because the grog of calcium hydroxide is limited in the system, the aquation of coal gangue is very slow and hydration reaction is incomplete, stay a large amount of holes after the free water evaporation in the system, it is bigger to show porosity on water mudrock structure, the densification degree of structure is low, and strength of cement is lower.
The exciting agent component is a kind of alkali compound activator that is used to excite gangue active, and it contains alkali and other active substances thereof, makes the aquation of coal gangue not exclusively depend on calcium hydroxide quantity and the speed that the cement clinker aquation produces.Mainly comprise components such as sodium hydroxide, calcium hydroxide, sodium-potassium silicate, water glass.Coal gangue just began to participate in hydration reaction with fast speeds at the aquation initial stage, and produced intensity, made that the potential hydraulically active of coal gangue is given full play to.Therefore, after adding extraordinary exciting agent, make coal gangue volume in complex cement can reach 80%, cement still shows early stage preferably and later strength, and the complex cement strength grade can reach 42.5.After mixing extraordinary exciting agent component, coal gangue obtains abundant aquation under the effect of alkaline matter, and its hydrated product constantly is filled in former hydrospace, makes the continuous densification of its structure, so the porosity of cement stone is little, and the structural compactness height, strength of cement improves greatly.
Gypsum adjustable solidification agent component is a kind of hydrated cementitious component of time of coagulation of regulating.It can adjust the hydration rate of cement clinker and coal gangue in suitable volume scope, thereby can adjust the time of coagulation of big volume coal gangue complex cement.Generally select dihydrate gypsum mineral or semi-hydrated gypsum mineral for use.
Mineral admixture is a kind of supplementary cementitious material, and mixing of mineral admixture not only can replenish the required activeconstituents of coal gangue complex cement, can promote the aquation and the sclerosis of complex cement, simultaneously, also plays filling, densification.Mineral admixture can be selected flyash, slag micropowder, limestone powder, silicon ash etc. for use.
Preparation method of the present invention is:
Preparing raw material: at first with big blocky coal gangue at the crusher in crushing particulate, in the high-temperature calcination stove, calcine then, calcining temperature is between 600 ℃-1000 ℃, heating-up time was controlled at 40-60 minute, calcination time was controlled at 1.5-2.5 hour, when constant temperature discharging during to the specified time, and in air naturally cooling, use the ball mill grinding to desired fineness at last, specific surface area is controlled at 300-400m
2/ kg;
Exciting agent also uses the ball mill grinding to desired fineness, and specific surface area is controlled at 300-400m
2About/kg.Exciting agent adds before calcined coal gangue by usage ratio, or adds after calcining;
Will grinding to be to desired fineness in ball mill by usage ratio through incinerating Portland clinker and gypsum, specific surface area is controlled at 300-400m
2/ kg;
Grinding is to required fineness in ball mill with selected mineral admixture (as flyash or water-granulated slag), and specific surface area is controlled at 300-400m
2About/kg;
Then, coal gangue powder, cement clinker powder, mineral admixture powder ratio in accordance with regulations are mixed and made into the coal gangue complex cement of big volume.
Because of the hardness of minerals difference of coal gangue powder, cement clinker powder, mineral admixture, grinding is to the required asynchronism(-nization) of fineness of regulation, and general requirement is separated grinding with it.Sometimes, produce, in the preparation process,, also can form by the common grinding of ratio in accordance with regulations if selected coal gangue powder, cement clinker powder, mineral admixture hardness of minerals are basic identical.
The big volume gangue cement of the present invention's preparation has the performance of following excellence:
1, in complex cement, adopts extraordinary exciting agent that the activity of industrial residue of coal gangue is excited, make its potential water rigid being not fully exerted of living;
2, the standard consistency of complex cement, time of coagulation, stability or the like physicals all satisfies national standard and industry requirement.When the coal gangue volume reaches 50% when above, the complex cement strength grade can reach 42.5; When coal gangue and mineral admixture volume reach 70% when above, the strength grade of complex cement can reach 32.5;
3, the hydration heat of big volume coal gangue complex cement is lower, is a kind of low heat cement, is specially adapted to mass concrete;
4, complex cement has high strength, excellent durability, low environmental load three big features, meets China's strategy of sustainable development.
Embodiment
Big volume coal gangue complex cement is made up of coal gangue, Portland clinker, exciting agent, gypsum adjustable solidification agent, mineral admixture.Below, embodiment of the present invention will be described in conjunction with the embodiments.
Embodiment 1
Become powder by each composition is carried out grinding by above-mentioned preparation method, mix by following part by weight then.
Coal gangue 50%
Portland clinker 41%
Extraordinary exciting agent 6%
Gypsum adjustable solidification agent 3%
Mineral admixture 0
The complex cement of present embodiment preparation can reach 42.5 strength grades, and cement is early stage, the later strength development is all better, and weather resistance is also very excellent.
Embodiment 2
Become powder by each composition is carried out grinding by above-mentioned preparation method, mix by following part by weight then.
Coal gangue 50%
Portland clinker 20%
Exciting agent 7%
Gypsum adjustable solidification agent 3%
Mineral admixture 20%
The complex cement of present embodiment preparation can reach 32.5 strength grades, and cement is early stage, the later strength development is mild, and hydration heat is very low.
Embodiment 3
Become powder by each composition is carried out grinding by above-mentioned preparation method, mix by following part by weight then.
Coal gangue 40%
Portland clinker 20%
Exciting agent 7%
Gypsum adjustable solidification agent 3%
Mineral admixture 30%
The complex cement of present embodiment preparation can reach more than 32.5 strength grades, and cement is early stage, the later strength development is better, and hydration heat is low, excellent in te pins of durability.
In the foregoing description, used exciting agent can be made up of sodium hydroxide, calcium hydroxide, water glass, sodium-potassium silicate etc.; Used gypsum adjustable solidification agent can be semi-hydrated gypsum or dihydrate gypsum etc.; Used mineral admixture can be used flyash, slag micropowder, limestone powder, silicon ash etc.
Claims (5)
1, a kind of big volume coal gangue complex cement is characterized in that being made up of coal gangue, Portland clinker, extraordinary exciting agent, gypsum adjustable solidification agent, mineral admixture, and each weight percentages of components is:
Coal gangue 20-80%
Portland clinker 20-50%
Exciting agent 2-10%
Gypsum adjustable solidification agent 0-5%
Mineral admixture 0-30%
Above-mentioned each component total amount sum satisfies 100%.
2, complex cement according to claim 1 is characterized in that said exciting agent is made up of sodium hydroxide, calcium hydroxide, sodium-potassium silicate, water glass.
3, complex cement according to claim 1 is characterized in that said gypsum adjustable solidification agent is dihydrate gypsum or semi-hydrated gypsum.
4, complex cement according to claim 1 is characterized in that said mineral admixture is one or more of flyash, slag micropowder, limestone powder, silicon ash.
5, a kind of preparation method of big volume bastard coal complex cement, it is characterized in that concrete steps are as follows: at first with big blocky coal gangue at the crusher in crushing particulate, in the high-temperature calcination stove, calcine then, calcining temperature is between 600 ℃-1000 ℃, and the heating-up time was controlled in 40-60 minute, and calcination time was controlled at 1.5-2.5 hour, when constant temperature discharging during to the specified time, and in air naturally cooling, use the ball mill grinding to desired fineness at last, specific surface area is controlled at 300-400m
2/ kg;
Exciting agent also uses the ball mill grinding to desired fineness, and specific surface area is controlled at 300-400m
2About/kg.Exciting agent adds before calcined coal gangue by usage ratio, or adds after calcining;
Will grinding to be to desired fineness in ball mill by usage ratio through incinerating Portland clinker and gypsum, specific surface area is controlled at 300-400m
2/ kg;
Grinding is to required fineness in ball mill with selected mineral admixture (as flyash or water-granulated slag), and specific surface area is controlled at 300-400m
2About/kg;
At last, coal gangue powder, cement clinker powder, mineral admixture powder usage ratio in accordance with regulations are mixed and made into the coal gangue complex cement of big volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101089885A CN1546410A (en) | 2003-12-01 | 2003-12-01 | Composite cement with large amount of coal gangue and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101089885A CN1546410A (en) | 2003-12-01 | 2003-12-01 | Composite cement with large amount of coal gangue and its preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1546410A true CN1546410A (en) | 2004-11-17 |
Family
ID=34334972
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101089885A Pending CN1546410A (en) | 2003-12-01 | 2003-12-01 | Composite cement with large amount of coal gangue and its preparation method |
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| CN (1) | CN1546410A (en) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452805A (en) * | 2010-10-20 | 2012-05-16 | 新疆研科节能科技有限公司 | High-durability concrete mineral admixture aid |
| CN102643067A (en) * | 2012-04-11 | 2012-08-22 | 王谦源 | Coal ash gangue filling activity-stimulating rubber solid material and preparation method thereof |
| CN102815908A (en) * | 2012-09-17 | 2012-12-12 | 河南城建学院 | Gneiss cement and preparation method thereof |
| CN102815909A (en) * | 2012-09-17 | 2012-12-12 | 河南城建学院 | Gangue ready mixed mortar and preparation method thereof |
| WO2013078839A1 (en) | 2011-11-28 | 2013-06-06 | 泸州兰良水泥有限公司 | Method for calcining blending material with high activity by feeding outside kiln head and equipment thereof |
| CN103319105A (en) * | 2013-07-01 | 2013-09-25 | 湖南省湘维有限公司 | Inorganic waterproof cementitious material and preparation method thereof |
| CN103787602A (en) * | 2014-01-17 | 2014-05-14 | 北京奥润开元环保科技研究院有限公司 | Superfine regeneration powder compound geopolymer cementing material |
| CN105502973A (en) * | 2015-12-19 | 2016-04-20 | 湖南科技大学 | Calcium-poor and silicon-rich ecological cement and application thereof |
| CN105502974A (en) * | 2015-12-19 | 2016-04-20 | 彭美勋 | Method for treating and utilizing nickel mineral metallurgy waste residues |
| CN105601134A (en) * | 2015-12-19 | 2016-05-25 | 湖南科技大学 | Method for full use of coal gangue for preparing cement |
| CN105837148A (en) * | 2016-03-26 | 2016-08-10 | 南京兰叶建设集团有限公司 | Waste residue cement |
| CN105948542A (en) * | 2016-04-29 | 2016-09-21 | 山东众森节能材料有限公司 | Concrete cementing material, preparation method thereof and application thereof |
| CN106045353A (en) * | 2016-05-31 | 2016-10-26 | 无锡锡能锅炉有限公司 | Cement for high-temperature-resistant gas boiler |
| CN106915913A (en) * | 2017-02-21 | 2017-07-04 | 上海市建筑科学研究院 | Composite exciting agent and its application prepared by a kind of utilization industrial residue |
| CN108609986A (en) * | 2018-05-16 | 2018-10-02 | 辽宁大学 | A kind of preparation method and application of the eco-concrete based on discarded gangue |
| CN109956737A (en) * | 2019-05-15 | 2019-07-02 | 中南大学 | A method of active mixed material is prepared using belt type roasting machine pelletizing method |
| CN110776268A (en) * | 2019-12-05 | 2020-02-11 | 亚泰集团伊通水泥有限公司 | Cement clinker and preparation method and application thereof |
| CN110981335A (en) * | 2019-11-28 | 2020-04-10 | 新疆研科节能科技有限公司 | Preparation method and use method of novel concrete anti-cracking cementing material |
| CN111205005A (en) * | 2020-03-06 | 2020-05-29 | 交通运输部公路科学研究所 | Cementing material, application and concrete |
| CN113003961A (en) * | 2021-03-25 | 2021-06-22 | 韶关市柏林再生资源开发有限公司 | Formula of coal gangue active cementing material |
| CN113772990A (en) * | 2021-09-25 | 2021-12-10 | 成都新豪鼎盛建材有限公司 | Special additive for high-strength concrete and preparation method thereof |
| CN115057633A (en) * | 2022-04-29 | 2022-09-16 | 中国恩菲工程技术有限公司 | Preparation method of gangue-based concrete admixture |
| CN116102281A (en) * | 2022-11-18 | 2023-05-12 | 湖南科技大学 | Method for quickly preparing high-activity mixed material at low temperature by utilizing shield drying soil and high-activity mixed material prepared by method and application of high-activity mixed material |
| CN117819848A (en) * | 2024-01-05 | 2024-04-05 | 安徽淮海新材料有限责任公司 | Method for preparing high-activity micro powder by using decarburized coal gangue, slag powder and cement clinker |
| CN118005358A (en) * | 2024-04-09 | 2024-05-10 | 内蒙古工业大学 | Low-carbon concrete with strength regulated and controlled by coal gangue instead of cement and preparation method thereof |
-
2003
- 2003-12-01 CN CNA2003101089885A patent/CN1546410A/en active Pending
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452805A (en) * | 2010-10-20 | 2012-05-16 | 新疆研科节能科技有限公司 | High-durability concrete mineral admixture aid |
| WO2013078839A1 (en) | 2011-11-28 | 2013-06-06 | 泸州兰良水泥有限公司 | Method for calcining blending material with high activity by feeding outside kiln head and equipment thereof |
| CN102643067A (en) * | 2012-04-11 | 2012-08-22 | 王谦源 | Coal ash gangue filling activity-stimulating rubber solid material and preparation method thereof |
| CN102815908A (en) * | 2012-09-17 | 2012-12-12 | 河南城建学院 | Gneiss cement and preparation method thereof |
| CN102815909A (en) * | 2012-09-17 | 2012-12-12 | 河南城建学院 | Gangue ready mixed mortar and preparation method thereof |
| CN102815908B (en) * | 2012-09-17 | 2015-03-18 | 河南城建学院 | Gneiss cement and preparation method thereof |
| CN103319105A (en) * | 2013-07-01 | 2013-09-25 | 湖南省湘维有限公司 | Inorganic waterproof cementitious material and preparation method thereof |
| CN103319105B (en) * | 2013-07-01 | 2015-04-01 | 湖南省湘维有限公司 | Inorganic waterproof cementitious material and preparation method thereof |
| CN103787602A (en) * | 2014-01-17 | 2014-05-14 | 北京奥润开元环保科技研究院有限公司 | Superfine regeneration powder compound geopolymer cementing material |
| CN103787602B (en) * | 2014-01-17 | 2015-12-02 | 北京奥润开元环保科技研究院有限公司 | A kind of ultra-fine regenerated powder complex geological polymer gel material |
| CN105502973A (en) * | 2015-12-19 | 2016-04-20 | 湖南科技大学 | Calcium-poor and silicon-rich ecological cement and application thereof |
| CN105502974A (en) * | 2015-12-19 | 2016-04-20 | 彭美勋 | Method for treating and utilizing nickel mineral metallurgy waste residues |
| CN105601134A (en) * | 2015-12-19 | 2016-05-25 | 湖南科技大学 | Method for full use of coal gangue for preparing cement |
| CN105502973B (en) * | 2015-12-19 | 2018-02-16 | 湖南科技大学 | A kind of poor calcium Silicon-rich eco-cement and application thereof |
| CN105502974B (en) * | 2015-12-19 | 2018-02-16 | 彭美勋 | A kind of processing of nickel minerals metallurgical slag and Application way |
| CN105837148A (en) * | 2016-03-26 | 2016-08-10 | 南京兰叶建设集团有限公司 | Waste residue cement |
| CN105948542A (en) * | 2016-04-29 | 2016-09-21 | 山东众森节能材料有限公司 | Concrete cementing material, preparation method thereof and application thereof |
| CN105948542B (en) * | 2016-04-29 | 2018-05-22 | 山东众森节能材料有限公司 | A kind of concrete gel material, preparation method and applications |
| CN106045353A (en) * | 2016-05-31 | 2016-10-26 | 无锡锡能锅炉有限公司 | Cement for high-temperature-resistant gas boiler |
| CN106045353B (en) * | 2016-05-31 | 2018-12-07 | 无锡锡能锅炉有限公司 | High-temperature resistant gas boiler feed water mud |
| CN106915913A (en) * | 2017-02-21 | 2017-07-04 | 上海市建筑科学研究院 | Composite exciting agent and its application prepared by a kind of utilization industrial residue |
| CN108609986A (en) * | 2018-05-16 | 2018-10-02 | 辽宁大学 | A kind of preparation method and application of the eco-concrete based on discarded gangue |
| CN109956737A (en) * | 2019-05-15 | 2019-07-02 | 中南大学 | A method of active mixed material is prepared using belt type roasting machine pelletizing method |
| CN110981335A (en) * | 2019-11-28 | 2020-04-10 | 新疆研科节能科技有限公司 | Preparation method and use method of novel concrete anti-cracking cementing material |
| CN110776268A (en) * | 2019-12-05 | 2020-02-11 | 亚泰集团伊通水泥有限公司 | Cement clinker and preparation method and application thereof |
| CN111205005A (en) * | 2020-03-06 | 2020-05-29 | 交通运输部公路科学研究所 | Cementing material, application and concrete |
| CN113003961A (en) * | 2021-03-25 | 2021-06-22 | 韶关市柏林再生资源开发有限公司 | Formula of coal gangue active cementing material |
| CN113772990A (en) * | 2021-09-25 | 2021-12-10 | 成都新豪鼎盛建材有限公司 | Special additive for high-strength concrete and preparation method thereof |
| CN115057633A (en) * | 2022-04-29 | 2022-09-16 | 中国恩菲工程技术有限公司 | Preparation method of gangue-based concrete admixture |
| CN116102281A (en) * | 2022-11-18 | 2023-05-12 | 湖南科技大学 | Method for quickly preparing high-activity mixed material at low temperature by utilizing shield drying soil and high-activity mixed material prepared by method and application of high-activity mixed material |
| CN116102281B (en) * | 2022-11-18 | 2023-07-25 | 湖南科技大学 | Method for quickly preparing high-activity mixed material at low temperature by utilizing shield drying soil and high-activity mixed material prepared by method and application of high-activity mixed material |
| CN117819848A (en) * | 2024-01-05 | 2024-04-05 | 安徽淮海新材料有限责任公司 | Method for preparing high-activity micro powder by using decarburized coal gangue, slag powder and cement clinker |
| CN118005358A (en) * | 2024-04-09 | 2024-05-10 | 内蒙古工业大学 | Low-carbon concrete with strength regulated and controlled by coal gangue instead of cement and preparation method thereof |
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