CN103693924A - Bayer-process red mud doped dry-mixed plastering mortar and use method thereof - Google Patents
Bayer-process red mud doped dry-mixed plastering mortar and use method thereof Download PDFInfo
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- CN103693924A CN103693924A CN201310661560.7A CN201310661560A CN103693924A CN 103693924 A CN103693924 A CN 103693924A CN 201310661560 A CN201310661560 A CN 201310661560A CN 103693924 A CN103693924 A CN 103693924A
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- red mud
- mixed
- process red
- bayer process
- plastering mortar
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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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Abstract
The invention belongs to the technical field of building materials and particularly relates to Bayer-process red mud doped dry-mixed plastering mortar and a use method thereof. The plastering mortar is prepared from ordinary silicate cement, Bayer-process red mud, fly ash, cellulose ether, latex powder, modified attapulgite and river sand. The plastering mortar is prepared through taking the ordinary silicate cement, the Bayer-process red mud and the fly ash as cementing materials, taking the cellulose ether, the latex powder and the modified attapulgite as mortar water retention and thickening materials and taking the river sand as aggregate, and has the characteristics of good fluidity, good water retention, good cohesiveness, good strength development, low shrinkage, no cracking, good durability and the like. The plastering mortar is applicable to the plastering of buildings and constructed structure masonry and the plastering of the internal/external walls and ceilings of the buildings. According to the plastering mortar and the use method thereof, the Bayer-process red mud can be effectively utilized, and the added value of the Bayer-process red mud is increased, so that the social benefit is improved; meanwhile, the production cost of the plastering mortar is reduced, so that the economic benefit is improved.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of dry-mixed plastering mortar and using method thereof that is mixed with Bayer process red mud.
Background technology
Along with the develop rapidly of building trade, to building materials quality is stable, have higher requirement with energy-conserving and environment-protective.As one of most important material of construction, the appearance of premixing mortar (being commodity mortar) has solved the on-the-spot preparation of traditional mortar and has stirred the problems such as the labour intensity causing is large, quality is unstable, operating efficiency is low, pollution surrounding environment.Premixing mortar, according to the difference of supply pattern, is divided into dry-mixed mortar and wet mixing mortar two classes.Most dry-mixed plastering mortars are easy to crack in the market, shrink greatly, and cost is high, and these problems have limited the promotion and application of premixing motar.Therefore, develop quality good, the dry-mixed plastering mortar that cost is low is imperative.Meanwhile, along with the development of our building trade, also increasing to the demand of high-quality adulterant,, there is in various degree in short supply in adulterant slag powders and the flyash of high-quality in the market in some regions.
Bayer process red mud is to use highly basic sodium hydroxide (NaOH) stripping high alumina, high ferro, boehmite type and three boehmite types soil mining and metallurgy refining aluminum oxide (Al
2o
3) time the red mud shape solid waste of discharging.There is data to show, outer discharge capacity average out to (1-1.1) the t/t Al of Bayer process red mud
2o
3.China is as Al
2o
3big producing country, the annual Bayer process red mud total amount producing is tens million of tons, but the comprehensive utilization ratio of Bayer process red mud is less than 5%.Add accumulation over the years, storage is surprising.At present, domestic Al
2o
3factory is mostly delivered to stockyard by red mud, relies on mountain valley or the excavation farmland wet method of building a dam to store up, and takies a large amount of land resources, causes soil and water to pollute.The chemical composition of red mud and mineral composition change to some extent because the material composition of the additive in the composition of bauxite, production technique (sintering process, mixed combining method or Bayer process), production process is different with newly-generated compound composition.The Main chemical component of red mud is silicon-dioxide (SiO
2), calcium oxide (CaO), ferric oxide (Fe
2o
3), aluminum oxide (Al
2o
3), sodium oxide (Na
2o), titanium dioxide (TiO
2) and potassium oxide (K
2o).Compare Fe in the chemical composition of Bayer process red mud with mixed combining method red mud with red mud from sintering process
2o
3and Al
2o
3content is high, Fe
2o
3can reach 28% left and right of total amount, Al
2o
3for 17% left and right of total amount, alkali content and CaO content are low.It is calcium aluminosilicate hydrate, cancrinite, uhligite, diaspore and illite that the essential mineral of Bayer process red mud forms.
Summary of the invention
The object of the present invention is to provide a kind of preparation cost low, favorable working performance, glutinous poly-performance is good, shrinks littlely, do not ftracture, the dry-mixed plastering mortar that is mixed with Bayer process red mud and the using method thereof of good endurance.
A kind of dry-mixed plastering mortar that is mixed with Bayer process red mud that the present invention proposes, is comprised of ordinary Portland cement, Bayer process red mud, flyash, ether of cellulose, latex powder, attapulgite modified and river sand, and the weight ratio of each component is:
Ordinary Portland cement 100
Bayer process red mud 15-40
Flyash 15-40
Ether of cellulose 0.05-0.15
Latex powder 1-4
Attapulgite modified 3-9
River sand 390-540.
Each component preferably weight ratio is:
Ordinary Portland cement 100
Bayer process red mud 25-40
Flyash 15-25
Ether of cellulose 0.08-0.10
Latex powder 2-3
Attapulgite modified 4-6
River sand 420-495.
In the present invention, described ordinary Portland cement is 42.5 grades of ordinary Portland cements.
In the present invention, its particle diameter of described Bayer process red mud is (5-15) μ m, and the specific surface area of nitrogen determining adsorption is (10000-20000) m
2/ kg, quality coefficient is 1.1-1.6.
In the present invention, its particle diameter of described flyash is (35-45) μ m, and the specific surface area of nitrogen determining adsorption is (200-350) m
2/ kg, quality coefficient is 1.2-1.7.
In the present invention, described ether of cellulose is hydroxymethyl-propyl cellulose ether (HPMC), and its viscosity is 10000 mPa ﹒ s.
In the present invention, described latex powder is a watt gram 8031H latex powder.
In the present invention, described attapulgite modified fineness is (200-300) order.
In the present invention, described river sand is medium sand, and fineness modulus is 2.3-2.5, and tap density is (1250-1450) kg/m
3.
The dry-mixed plastering mortar preparation method who is mixed with Bayer process red mud that the present invention proposes, concrete steps are as follows:
By aforementioned part by weight, accurately take ordinary Portland cement, Bayer process red mud, flyash, ether of cellulose, latex powder, attapulgite modified and river sand, drop into dry mixing device, by mechanical stirring evenly after, obtain desired product.
A kind of using method that is mixed with the dry-mixed plastering mortar of Bayer process red mud that the present invention proposes, concrete steps are as follows: accurately take the dry-mixed plastering mortar and the water that are mixed with Bayer process red mud, first water is added to stirrer, along with blade of stirrer rotates, the dry-mixed plastering mortar that is mixed with Bayer process red mud is at the uniform velocity dropped into stirrer.After stirring, can construct.Amount of water is the 15%-20% of dry-mixed plastering mortar total mass.
Ordinary Portland cement, Bayer process red mud and flyash is as gelling material, usings ether of cellulose, latex powder and attapulgite modified as mortar water-keeping thickening material, with river sand for gathering materials.
Bayer process red mud composition is similar to cement clinker, and main chemical compositions is SiO
2, CaO, Fe
2o
3, Al
2o
3, Na
2o, TiO
2and K
2o, wherein Fe
2o
3and Al
2o
3content is high, Fe
2o
3can reach 28% left and right of total amount, Al
2o
3for 17% left and right of total amount, alkali content and CaO content are relatively low.It is calcium aluminosilicate hydrate, cancrinite, uhligite, diaspore and illite that the essential mineral of Bayer process red mud forms.There are some researches show, within the scope of certain volume, Bayer process red mud mixes in gelling system, can make the extent of hydration of cement be improved, the increase of hydrated product has improved the connection degree between hardened paste, thereby has improved intensity, the especially early strength of mortar.Meanwhile, Bayer process red mud is because the little and specific surface area of its particle diameter has greatly higher surfactivity, can active adsorption mixture in free water molecules, can effectively improve the serviceability of mortar mixture.
Pulverized burned coal ash hydration process is slower, and early activity is lower, and the golden period of development of its intensity is after 28d.Meanwhile, although in flyash, there is a large amount of aluminium silicate minerals, because [SiO wherein
4]
4-the tetrahedron polymerization degree is high, so activity is lower.Flyash is natural is acid, and its activeconstituents can be excited under alkaline condition, and Bayer process red mud is alkalescence, can excite the pozzolanic activity of flyash.The aquation of flyash is mainly the hydrated product calcium hydroxide (Ca (OH) of flyash and cement
2) between reaction, influence each other with the aquation of cement, mutually promote.
In dry-mixed plastering mortar of the present invention, ordinary Portland cement, Bayer process red mud and three kinds of gelling material of flyash are used in conjunction with, and play plural gel effect, reach the effect of mutual supplement with each other's advantages: utilize Bayer process red mud to improve the early strength of gelling system; And utilize flyash to make up the poor defect of gelling system later strength, this three just forms a strength development " echelon ", that Bayer process red mud and cement provide intensity in early days, later stage is that coal ash lifting is for intensity, the structure that has so just guaranteed gelling system more accesses abundant development, density improves constantly, the development that intensity can continue.Bayer process red mud is incorporated into the effect in flyash-cement cementitious system with two aspects: be on the one hand Bayer process red mud and the reacting of cement, this reaction has promoted the hydration reaction speed of cement; The hydrated product Ca (OH) of Bayer process red mud and cement on the other hand
2the effect of common and flyash.The effect of in fact above-mentioned two aspects is to connect each other interactionally, and Bayer process red mud has also promoted the aquation of flyash when promoting hydrated cementitious.
Ether of cellulose in the present invention, latex powder and attapulgite modified be the water-keeping thickening material of dry-mixed plastering mortar, can improve toughness and the water-retentivity of mortar.
After ether of cellulose in mortar dissolves in water, because surface-active action has guaranteed gelling material, in system, be effectively uniformly distributed, make mortar more stable.Ether of cellulose, as polymer long-chain material, adds after cement cementitious system, makes the moisture in mortar be difficult for losing, and progressively discharges within long period of time, gives water-retentivity and workability that mortar is good.Meanwhile, the aqueous solution surface of containing ether of cellulose can reduce, thereby makes ether of cellulose to sand-cement slurry, have the effect of bleed.In mortar, introduce suitable bubble, " the ball effect " due to mortar, improves the serviceability of mortar.
Attapulgite be a kind of tool fiber pattern layer chain transition structure containing Shuifu County's magnesium silicate clay mineral.Attapulgite modified is the pencil aggregate of the fibroplastic crisscross intersection of needle-like crystal.Aggregate, in mortar, prevents the sedimentation of sand in mortar thereby can wrap up the macrobeads such as sand.Attapulgite modified viscosity, water retention and the thixotropy that can improve mortar.
The present invention utilizes Bayer process red mud to prepare dry-mixed plastering mortar as adulterant.Product of the present invention is usingd ordinary Portland cement, Bayer process red mud and flyash as gelling material, usings ether of cellulose, latex powder and attapulgite modified as mortar water-keeping thickening material, and the river sand of take forms as aggregate blending.Product of the present invention has good fluidity, good water-retaining property, glutinous poly-property is good, and strength development is good, it is little to shrink, do not ftracture and the characteristic such as good endurance.It is easy to crack that product of the present invention not only can solve common dry-mixed plastering mortar, shrinks large problem; Can also make full use of Bayer process red mud, turn waste into wealth, reduce dry-mixed mortar preparation cost, increase economic efficiency; Meanwhile, can also alleviate Bayer process red mud and stack environmental pollution and the land wastage problem of bringing of processing; In addition, the application of Bayer process red mud in mortar, also can alleviate high-quality blended material problem in short supply in the market.
Embodiment
Below by embodiment, further illustrate the present invention.
Embodiment 1, a kind of dry-mixed plastering mortar that is mixed with Bayer process red mud, and by ordinary Portland cement 100, Bayer process red mud 15, flyash 15, ether of cellulose 0.05, latex powder 1, attapulgite modified 3, the weight ratio of river sand 390 is formulated.By 15% of dry-mixed plastering mortar total mass, add water and stir, obtain required product.The performance test results is in Table 1.
Embodiment 2, a kind of dry-mixed plastering mortar that is mixed with Bayer process red mud, and by ordinary Portland cement 100, Bayer process red mud 25, flyash 25, ether of cellulose 0.10, latex powder 2, attapulgite modified 6, the weight ratio of river sand 450 is formulated.By 18% of dry-mixed plastering mortar total mass, add water and stir, obtain required product.The performance test results is in Table 1.
Embodiment 3, a kind of dry-mix that is mixed with Bayer process red mud, and by ordinary Portland cement 100, Bayer process red mud 40, flyash 40, ether of cellulose 0.15, latex powder 4, attapulgite modified 9, the weight ratio of river sand 540 is formulated.By 20% of dry-mixed plastering mortar total mass, add water and stir, obtain required product.The performance test results is in Table 1.
table 1 embodiment the performance test results
| Performance index | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Denseness (mm) | 92 | 94 | 90 |
| Water retention (%) | 93.2 | 93.9 | 94.6 |
| Cohesive strength (MPa) | 0.9 | 0.9 | 0.8 |
| 28d ultimate compression strength (MPa) | 21.3 | 20.3 | 19.3 |
| 28d shrinking percentage (%) | 0.046 | 0.042 | 0.048 |
Claims (10)
1. be mixed with a dry-mixed plastering mortar for Bayer process red mud, ordinary Portland cement, Bayer process red mud, flyash, ether of cellulose, latex powder, attapulgite modified and river sand, consist of, the weight ratio of each component is:
Ordinary Portland cement 100
Bayer process red mud 15-40
Flyash 15-40
Ether of cellulose 0.05-0.15
Latex powder 1-4
Attapulgite modified 3-9
River sand 390-540.
2. a kind of dry-mixed plastering mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that the weight ratio of each component is:
Ordinary Portland cement 100
Bayer process red mud 25-40
Flyash 15-25
Ether of cellulose 0.08-0.10
Latex powder 2-3
Attapulgite modified 4-6
River sand 420-495.
3. a kind of dry-mixed plastering mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that described ordinary Portland cement is 42.5 grades of ordinary Portland cements.
4. a kind of dry-mixed plastering mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that described Bayer process red mud particle diameter is (5-15) μ m, and the specific surface area of nitrogen determining adsorption is (10000-20000) m
2/ kg, quality coefficient K is 1.1-1.6.
5. a kind of dry-mixed plastering mortar that is mixed with Bayer process red mud according to claim 1, the particle diameter that it is characterized in that described flyash is (35-45) μ m, the specific surface area of nitrogen determining adsorption is (200-350) m
2/ kg, quality coefficient K is 1.2-1.7.
6. a kind of dry-mixed plastering mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that described ether of cellulose is hydroxymethyl-propyl cellulose ether, and its viscosity is 10000mPa ﹒ s.
7. a kind of dry-mixed plastering mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that described latex powder is watt gram 8031H latex powder.
8. a kind of dry-mixed plastering mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that described attapulgite modified fineness is for (200-300) order.
9. a kind of dry-mixed plastering mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that described river sand is medium sand, and fineness modulus is 2.3-2.5, and tap density is (1250-1450) kg/m
3.
10. an a kind of using method that is mixed with the dry-mixed plastering mortar of Bayer process red mud as claimed in claim 1, the amount of water while it is characterized in that construction application is the 15%-20% of dry-mixed plastering mortar total mass.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310661560.7A CN103693924B (en) | 2013-12-10 | 2013-12-10 | A kind of dry-mixed plastering mortar and using method thereof being mixed with Bayer process red mud |
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|---|---|---|---|
| CN201310661560.7A CN103693924B (en) | 2013-12-10 | 2013-12-10 | A kind of dry-mixed plastering mortar and using method thereof being mixed with Bayer process red mud |
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| CN103693924A true CN103693924A (en) | 2014-04-02 |
| CN103693924B CN103693924B (en) | 2015-07-29 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104649642A (en) * | 2015-02-09 | 2015-05-27 | 同济大学 | Crushed straw fiber toughened plastering mortar and application method thereof |
| WO2018037422A1 (en) * | 2016-08-22 | 2018-03-01 | Hindalco Industries Limited | Ready-mix plaster material prepared using industrial wastes |
| CN109399975A (en) * | 2018-11-26 | 2019-03-01 | 武汉理工大学 | A kind of red mud solid sulfur ash steel-making slag powder coupling excited cementing material and its application |
| CN109503032A (en) * | 2019-01-04 | 2019-03-22 | 山东大学 | A kind of asphalt and preparation method thereof of physical modification red mud substitution miberal powder |
| CN111995269A (en) * | 2020-08-06 | 2020-11-27 | 广东同创科鑫环保有限公司 | Red mud-based cementing material and preparation method and application thereof |
| CN115070939A (en) * | 2022-07-22 | 2022-09-20 | 山东科扬机械有限公司 | Preparation method of dry-mixed mortar |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1686902A (en) * | 2005-04-22 | 2005-10-26 | 东南大学 | Attapulgite additive for compound mortar |
| CN102584124A (en) * | 2012-02-21 | 2012-07-18 | 陕西理工学院 | Technology for preparing zeolite-containing inorganic insulation mortar |
-
2013
- 2013-12-10 CN CN201310661560.7A patent/CN103693924B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1686902A (en) * | 2005-04-22 | 2005-10-26 | 东南大学 | Attapulgite additive for compound mortar |
| CN102584124A (en) * | 2012-02-21 | 2012-07-18 | 陕西理工学院 | Technology for preparing zeolite-containing inorganic insulation mortar |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104649642A (en) * | 2015-02-09 | 2015-05-27 | 同济大学 | Crushed straw fiber toughened plastering mortar and application method thereof |
| WO2018037422A1 (en) * | 2016-08-22 | 2018-03-01 | Hindalco Industries Limited | Ready-mix plaster material prepared using industrial wastes |
| CN109399975A (en) * | 2018-11-26 | 2019-03-01 | 武汉理工大学 | A kind of red mud solid sulfur ash steel-making slag powder coupling excited cementing material and its application |
| CN109399975B (en) * | 2018-11-26 | 2022-03-11 | 武汉理工大学 | Red mud sulfur fixation ash steel slag powder coupling excitation cementing material and application thereof |
| CN109503032A (en) * | 2019-01-04 | 2019-03-22 | 山东大学 | A kind of asphalt and preparation method thereof of physical modification red mud substitution miberal powder |
| CN111995269A (en) * | 2020-08-06 | 2020-11-27 | 广东同创科鑫环保有限公司 | Red mud-based cementing material and preparation method and application thereof |
| CN111995269B (en) * | 2020-08-06 | 2022-03-29 | 广东同创科鑫环保有限公司 | Red mud-based cementing material and preparation method and application thereof |
| CN115070939A (en) * | 2022-07-22 | 2022-09-20 | 山东科扬机械有限公司 | Preparation method of dry-mixed mortar |
| CN115070939B (en) * | 2022-07-22 | 2023-01-31 | 山东科扬机械有限公司 | Preparation method of dry-mixed mortar |
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| CN103693924B (en) | 2015-07-29 |
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