CN103693924B - A kind of dry-mixed plastering mortar and using method thereof being mixed with Bayer process red mud - Google Patents
A kind of dry-mixed plastering mortar and using method thereof being mixed with Bayer process red mud Download PDFInfo
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- CN103693924B CN103693924B CN201310661560.7A CN201310661560A CN103693924B CN 103693924 B CN103693924 B CN 103693924B CN 201310661560 A CN201310661560 A CN 201310661560A CN 103693924 B CN103693924 B CN 103693924B
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- red mud
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- bayer process
- process red
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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 building material technical field, be specifically related to a kind of dry-mixed plastering mortar and the using method thereof that are mixed with Bayer process red mud.Be made up of ordinary Portland cement, Bayer process red mud, flyash, ether of cellulose, latex powder, attapulgite modified and river sand.Product of the present invention is using ordinary Portland cement, Bayer process red mud and flyash as gelling material, using ether of cellulose, latex powder and attapulgite modified as mortar water-keeping thickening material, with river sand for aggregate blending forms, there is good fluidity, good water-retaining property, glutinous poly-property be good, strength development is good, shrink little, do not ftracture and the characteristic such as good endurance.Product of the present invention is applicable to plastering of plastering of buildings and structures masonry and buildings external and internal wall and ceiling.The present invention effectively can utilize Bayer process red mud, improves the value added of Bayer process red mud, improves social benefit; Reduce the production cost of motar simultaneously, increase economic efficiency.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of dry-mixed plastering mortar and the using method thereof that are mixed with Bayer process red mud.
Background technology
Along with the develop rapidly of building trade, to building materials quality, stable and energy-conserving and environment-protective are had higher requirement.As one of most important material of construction, the appearance of premixing mortar (i.e. commodity mortar) solves traditional mortar extemporaneous preparation and stirs the problems such as the labour intensity caused 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 class.Most dry-mixed plastering mortar is easy to crack in the market, and shrink large, cost is high, and these problems limit 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, the adulterant slag powders of high-quality and flyash in the market, what occurred in various degree in some regions is in short supply.
Bayer process red mud uses 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 discharge red pureed solid waste.Data is had 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 produced is tens million of ton, 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
3red mud is mostly delivered to stockyard by factory, relies on mountain valley or excavation farmland wet method of building a dam to store up, takies a large amount of land resources, cause soil and water to pollute.The chemical composition of red mud and mineral composition because of the material composition of the additive in the composition of bauxite, production technique (sintering process, mixed combining method or Bayer process), production process different with newly-generated chemical composition and change to some extent.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 with mixed combining method red mud with red mud from sintering process, Fe in the chemical composition of Bayer process red mud
2o
3and Al
2o
3content is high, Fe
2o
3about 28%, Al of total amount can be reached
2o
3for about 17% of total amount, alkali content and CaO content low.The essential mineral composition of Bayer process red mud is calcium aluminosilicate hydrate, cancrinite, uhligite, diaspore and illite.
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 little, does not ftracture, the dry-mixed plastering mortar being mixed with Bayer process red mud of good endurance and using method thereof.
A kind of dry-mixed plastering mortar being mixed with Bayer process red mud that the present invention proposes, be made up of ordinary Portland cement, Bayer process red mud, flyash, ether of cellulose, latex powder, attapulgite modified and river sand, 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) μm, and the specific surface area that N2 adsorption measures 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) μm, and the specific surface area that N2 adsorption measures 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 being mixed with Bayer process red mud that the present invention proposes, concrete steps are as follows:
Accurately take ordinary Portland cement, Bayer process red mud, flyash, ether of cellulose, latex powder, attapulgite modified and river sand in aforementioned weight ratio, drop into dry mixing device, after even by mechanical stirring, obtain desired product.
A kind of using method being 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 water that are mixed with Bayer process red mud, first water is added stirrer, along with blade of stirrer rotates, the dry-mixed plastering mortar being mixed with Bayer process red mud is at the uniform velocity dropped into stirrer.Can construct after stirring.Amount of water is the 15%-20% of dry-mixed plastering mortar total mass.
Ordinary Portland cement, Bayer process red mud and flyash as gelling material, using 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
3about 28%, Al of total amount can be reached
2o
3for about 17% of total amount, alkali content and CaO content relatively low.The essential mineral composition of Bayer process red mud is calcium aluminosilicate hydrate, cancrinite, uhligite, diaspore and illite.There are some researches show, within the scope of certain volume, Bayer process red mud mixes in gelling system, the extent of hydration of cement can be made to be improved, the increase of hydrated product improves the Connected degree between hardened paste, thus improves the intensity of mortar, especially early strength.Meanwhile, Bayer process red mud has higher surfactivity because the little and specific surface area of its particle diameter is large, and water molecules that can be free in active adsorption mixture, effectively can improve the serviceability of mortar mixture.
Pulverized burned coal ash hydration process is relatively slower, and early activity is lower, and the golden period of development of its intensity is after 28d.Meanwhile, although there is a large amount of aluminium silicate minerals in flyash, because wherein [SiO
4]
4-tetrahedral polymerization degree is high, so activity is lower.Flyash is natural, and in acid, its activeconstituents can be excited in the basic conditions, and Bayer process red mud is in alkalescence, can excite the pozzolanic activity of flyash.Hydrated product calcium hydroxide (the Ca (OH) of the aquation of flyash mainly 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 flyash three kinds of gelling material with the use of, play composite cementitious material, 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 defect of gelling system later strength difference, this three is just formed " echelon " of a strength development, that Bayer process red mud and cement provide intensity in early days, later stage is that coal ash lifting is for intensity, the structure this ensures that thering 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: the reaction being Bayer process red mud and cement on the one hand, and this reaction facilitates 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 connects each other interactional, and Bayer process red mud is promoting the aquation also promoting flyash while 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, toughness and the water-retentivity of mortar can be improved.
After ether of cellulose in mortar dissolves in water, because surface-active action ensure that gelling material is effectively uniformly distributed in system, make mortar more stable.Ether of cellulose, as high polymer long chain material, after adding cement cementitious system, makes the moisture in mortar not easily lose, and progressively discharges within long period of time, gives the good water-retentivity of mortar and workability.Meanwhile, the aqueous solution surface energy containing ether of cellulose reduces, thus makes ether of cellulose have the effect of bleed to sand-cement slurry.In mortar, introduce suitable bubble, due to " the ball effect " of mortar, the serviceability of mortar is improved.
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, can wrap up the macrobeads such as sand thus the sedimentation preventing sand in mortar.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 using ordinary Portland cement, Bayer process red mud and flyash as gelling material, using ether of cellulose, latex powder and attapulgite modified as mortar water-keeping thickening material, with river sand for aggregate blending forms.Product of the present invention has good fluidity, good water-retaining property, glutinous poly-property are 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 Bayer process red mud be made full use of, turn waste into wealth, reduce dry-mixed mortar preparation cost, increase economic efficiency; Meanwhile, Bayer process red mud can also be alleviated and stack the environmental pollution and land wastage problem that process and bring; In addition, the application of Bayer process red mud in mortar, also can alleviate the problem that high-quality blended material is in short supply in the market.
Embodiment
The present invention is further illustrated below by embodiment.
Embodiment 1, a kind of dry-mixed plastering mortar being mixed with Bayer process red mud, 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.Add water by 15% of dry-mixed plastering mortar total mass and stir, obtain required product.The performance test results is in table 1.
Embodiment 2, a kind of dry-mixed plastering mortar being mixed with Bayer process red mud, 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.Add water by 18% of dry-mixed plastering mortar total mass and stir, obtain required product.The performance test results is in table 1.
Embodiment 3, a kind of dry-mix being mixed with Bayer process red mud, 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.Add water by 20% of dry-mixed plastering mortar total mass 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 (8)
1. be mixed with a dry-mixed plastering mortar for Bayer process red mud, be made up of ordinary Portland cement, Bayer process red mud, flyash, ether of cellulose, latex powder, attapulgite modified and river sand, 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;
Described ether of cellulose is hydroxymethyl-propyl cellulose ether, and its viscosity is 10000mPa ﹒ s; Described latex powder is a watt gram 8031H latex powder.
2. a kind of dry-mixed plastering mortar being 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 being 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 being mixed with Bayer process red mud according to claim 1, it is characterized in that described Bayer process red mud particle diameter is for (5-15) μm, the specific surface area that N2 adsorption measures is (10000-20000) m
2/ kg, quality coefficient K are 1.1-1.6.
5. a kind of dry-mixed plastering mortar being mixed with Bayer process red mud according to claim 1, it is characterized in that the particle diameter of described flyash is for (35-45) μm, the specific surface area that N2 adsorption measures is (200-350) m
2/ kg, quality coefficient K are 1.2-1.7.
6. a kind of dry-mixed plastering mortar being mixed with Bayer process red mud according to claim 1, is characterized in that described attapulgite modified fineness is for (200-300) order.
7. a kind of dry-mixed plastering mortar being mixed with Bayer process red mud according to claim 1, it is characterized in that described river sand is medium sand, fineness modulus is 2.3-2.5, and tap density is (1250-1450) kg/m
3.
8. a kind of using method being mixed with the dry-mixed plastering mortar of Bayer process red mud as claimed in claim 1, amount of water when it is characterized in that construction application is the 15%-20% of dry-mixed plastering mortar total mass.
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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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|---|---|---|---|
| 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 CN103693924A (en) | 2014-04-02 |
| CN103693924B true CN103693924B (en) | 2015-07-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104649642B (en) * | 2015-02-09 | 2016-08-24 | 同济大学 | A kind of fiber reinforced motar of crushing straw and using method |
| WO2018037422A1 (en) * | 2016-08-22 | 2018-03-01 | Hindalco Industries Limited | Ready-mix plaster material prepared using industrial wastes |
| 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 |
| CN109503032B (en) * | 2019-01-04 | 2019-07-26 | 山东大学 | A kind of asphalt and preparation method thereof of physical modification red mud substitution miberal powder |
| 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 |
| CN115070939B (en) * | 2022-07-22 | 2023-01-31 | 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 |
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2013
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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 |
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Granted publication date: 20150729 Termination date: 20171210 |