CN101343161A - Cement-slag powder gel system with desulfurized gypsum as excitant - Google Patents
Cement-slag powder gel system with desulfurized gypsum as excitant Download PDFInfo
- Publication number
- CN101343161A CN101343161A CNA2008100417917A CN200810041791A CN101343161A CN 101343161 A CN101343161 A CN 101343161A CN A2008100417917 A CNA2008100417917 A CN A2008100417917A CN 200810041791 A CN200810041791 A CN 200810041791A CN 101343161 A CN101343161 A CN 101343161A
- Authority
- CN
- China
- Prior art keywords
- cement
- slag powder
- slag
- desulfurated plaster
- material system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/23—Acid resistance, e.g. against acid air or rain
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/24—Sea water resistance
-
- 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 relates to a cement-slag powder cementing material system which adopts the desulfurization gypsum as an activator, belonging to the technical field of the building materials. The cement-slag powder cementing material system is composed of cement, slag powder and desulfurization gypsum. With the cement-slag powder cementing material system adopted, on the condition that the proportion of the slag powder is 60 percent to 90 percent, the early mechanical properties can reach the standard of the cement of P.O 42.5 grade, and the later strength develops stably. The cement-slag powder cementing material system can be used to prepare a cementing system of very high green degree, and can effectively avoid the problem that the early strength of the high-blending slag powder cementing system develops slowly, for the problem affects the process and the quality of the project. The cement-slag powder cementing material system is applicable to being used as the raw material in the commercial concrete mixing station and the commercial mortar mixing station, and is more suitable for preparing the marine concrete and the sulfate resistant mortar in the project.
Description
Technical field
The invention belongs to building material technical field, being specifically related to a kind of is that the cement-slag arogel of exciting agent coagulates system with the desulfurated plaster.
Background technology
The Eleventh Five-Year Plan period give priority to economy, guarantee that ten thousand yuan of GDP can loss-rate descend about 20% in 2005, the GDP of 35%, 15 kind of main Mineral Resources output of ten thousand yuan of industrial added value water withdrawals decline improves about 20%; Main utilization of the recycling of renewable resources amount improves more than 65%, and industrial solid waste residue utilization rate is brought up to more than 60%.In the concrete industry, reach this target, can pass through to improve mineral admixture this approach of substitution rate cement, but because the early activity of most of mineral admixtures is lower, cause the gelling system early strength lower, limited its application at mortar (concrete).
Meanwhile, country strengthens the input of large-scale coal-fired enterprise flue-gas desulfurizing engineering in the Eleventh Five-Year Plan Environmental planning, the problem of efficiently utilizing of the industry byproduct desulfurated plaster that produces causes people's extensive concern, if it is mishandling, flue-gas desulfurizing engineering has just transformed the pollution form, fundamentally do not solve the pollution of sulfurous gas, and bank up precious resources such as more serious contaminated land, water sources.Therefore, how resource utilization efficiently utilizes desulfurated plaster to become the key that solves sulfur dioxide pollution.At present, both at home and abroad about the recycling problem of desulfurated plaster mostly from making the angle of plastering.And China is little to the demand of gypsum product owing to region characteristic, and the plaster of paris is rich in mineral resources, utilizes the prospect of desulfurated plaster article of manufacture not good, so the desulfurated plaster utilization ratio is not high.Then is a kind of approach of recycling more efficiently with desulfurated plaster as the activity excitant of cement additire, mortar additive component and composite blend.
Summary of the invention
The object of the present invention is to provide that a kind of construction costs is low, slag powders substitution rate height, early strength height, later strength development stability be that the cement-slag arogel of exciting agent coagulates system with the desulfurated plaster.
The cement-slag arogel that the present invention proposes coagulates system, is made up of cement, slag powders and desulfurated plaster, and the weight ratio of each component is:
Cement 10-40
Slag powders 60-90
Desulfurated plaster 2-15
Its gross weight satisfies 100%.
The preferable weight ratio of each component is:
Cement 20-30
Slag powders 70-80
Desulfurated plaster 5-10
Its gross weight satisfies 100%.
Preparation method of the present invention is: press aforementioned each part by weight weighing each component, cement, slag powders and desulfurated plaster are added in the mixing machine successively stir, the time is 2-4 minute, and grinding to fineness is about 300 orders then, obtains desired product.
Among the present invention, desulfurated plaster is the waste that produces after the coal-fired plant flue gas desulfurization, and main component is a dihydrate gypsum, also has a spot of semi-hydrated gypsum, lime carbonate and some solubility salts in addition.Desulfurated plaster has excitation preferably to the slag powders that the cement-slag arogel coagulates in the system.This is on the one hand because the dihydrate gypsum in the desulfurated plaster can promote C in the cement clinker
3The aquation of S mineral, its soluble impurity ion and CaCO simultaneously
3Have and be beneficial to the aquation of quickening cement, like this with respect to the aquation system of not mixing desulfurated plaster, increased Ca in the liquid phase (OH)
2Concentration, for the slag powders alkaline excitation provides condition, impel slag powders to carry out hydration reaction; On the other hand, the desulfurated plaster in the system can be directly and the active A l in the slag powders in alkaline environment
2O
3Ettringite is produced in reaction, and the intensity of system is had bigger contribution.Slag powders active component A l
2O
3With the reaction consumes of calcium sulfate a large amount of Ca (OH)
2, reduced its concentration in liquid phase, and then impelled the further aquation of cement clinker.This shows that desulfurated plaster coagulates the aquation that has promoted cement and slag powders in the system simultaneously at the cement-slag arogel, exciting of slag powders played the double effects of alkaline excitation and sulphate activation.
The present invention is a fine-powdered material, is under the situation of 60%-90% in the slag powders ratio, and early stage mechanical property can reach the standard of P.O42.5 class g cement, and the later strength development stability.Use the present invention can prepare the very high gelling system of green degree, and effectively avoid the early strength slower development of big volume slag powders gelling system, influence the problem of works progress and quality.During use, can use according to the method for ordinary Portland cement, concrete consumption and water cement ratio, definite by testing.
Available commodities concrete mixing plant of the present invention, commodity mortar stirring station use, applicable to different requirement of engineering, and especially maritime concrete engineering and the mortar of anti-vitriol engineering.
Embodiment
Further specify the present invention below by embodiment.
Embodiment 1, is the cement-slag gelling system of exciting agent with the desulfurated plaster, is by weight: cement 30, slag powders 65 and desulfurated plaster 5 are formulated.Products therefrom mixes with water, and when water-cement ratio was 0.5, this gelling system 3d, 7d and 28d ultimate compression strength were respectively: 17.8MPa, 34.2MPa and 45.6MPa.60d intensity can reach 58.6MPa.
Embodiment 2, are the cement-slag gelling system of exciting agent with the desulfurated plaster, are by weight: cement 25, slag powders 65 and desulfurated plaster 10 are formulated.Products therefrom mixes with water, and when water-cement ratio was 0.5, the ultimate compression strength of this gelling system 3d, 7d and 28d was respectively: 17.0MPa, 35.9MPa and 47.3MPa.60d intensity can reach 53.4MPa.
Embodiment 3, are the cement-slag gelling system of exciting agent with the desulfurated plaster, are by weight: cement 20, slag 72.5 and desulfurated plaster 7.5 are formulated.Products therefrom mixes with water, and when water-cement ratio was 0.5, the ultimate compression strength of this gelling system 3d, 7d and 28d was respectively: 18.1MPa, 34.4MPa and 46.9MPa.60d intensity can reach 60.9MPa.
Claims (2)
1, a kind of is that the cement-slag arogel of exciting agent coagulates system with the desulfurated plaster, it is characterized in that being made up of cement, slag powders and desulfurated plaster, and the weight ratio of each component is:
Cement 10-40
Slag powders 60-90
Desulfurated plaster 2-15
Its gross weight satisfies 100%.
2, according to claim 1 is that the cement-slag arogel of exciting agent coagulates system with the desulfurated plaster, it is characterized in that the weight ratio of each component is:
Cement 20-30
Slag powders 70-80
Desulfurated plaster 5-10
Its gross weight satisfies 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100417917A CN101343161A (en) | 2008-08-15 | 2008-08-15 | Cement-slag powder gel system with desulfurized gypsum as excitant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100417917A CN101343161A (en) | 2008-08-15 | 2008-08-15 | Cement-slag powder gel system with desulfurized gypsum as excitant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101343161A true CN101343161A (en) | 2009-01-14 |
Family
ID=40245300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100417917A Pending CN101343161A (en) | 2008-08-15 | 2008-08-15 | Cement-slag powder gel system with desulfurized gypsum as excitant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101343161A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092970A (en) * | 2010-12-30 | 2011-06-15 | 济南鲁新新型建材有限公司 | Special admixture for maritime work |
| CN102452814A (en) * | 2010-10-19 | 2012-05-16 | 上海城建物资有限公司 | High strength concrete adopting desulfurized gypsum as activator, and preparation method thereof |
| CN112341116A (en) * | 2020-10-21 | 2021-02-09 | 东南大学 | Desulfurized gypsum and super-sulfur cement concrete and preparation method thereof |
| CN115974432A (en) * | 2023-02-01 | 2023-04-18 | 广东盛瑞科技股份有限公司 | Solid waste cementing material for cement soil |
| CN116854450A (en) * | 2023-03-15 | 2023-10-10 | 四川省建材工业科学研究院有限公司 | Activating treatment agent for preparing sintered insulating bricks from water-based drilling cuttings |
-
2008
- 2008-08-15 CN CNA2008100417917A patent/CN101343161A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452814A (en) * | 2010-10-19 | 2012-05-16 | 上海城建物资有限公司 | High strength concrete adopting desulfurized gypsum as activator, and preparation method thereof |
| CN102092970A (en) * | 2010-12-30 | 2011-06-15 | 济南鲁新新型建材有限公司 | Special admixture for maritime work |
| CN102092970B (en) * | 2010-12-30 | 2012-10-10 | 济南鲁新新型建材有限公司 | Special admixture for maritime work |
| CN112341116A (en) * | 2020-10-21 | 2021-02-09 | 东南大学 | Desulfurized gypsum and super-sulfur cement concrete and preparation method thereof |
| CN115974432A (en) * | 2023-02-01 | 2023-04-18 | 广东盛瑞科技股份有限公司 | Solid waste cementing material for cement soil |
| CN116854450A (en) * | 2023-03-15 | 2023-10-10 | 四川省建材工业科学研究院有限公司 | Activating treatment agent for preparing sintered insulating bricks from water-based drilling cuttings |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090114 |