CN103771800A - Bayer process red mud-doped dry-blending masonry mortar and using method thereof - Google Patents

Bayer process red mud-doped dry-blending masonry mortar and using method thereof Download PDF

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Publication number
CN103771800A
CN103771800A CN201410003457.8A CN201410003457A CN103771800A CN 103771800 A CN103771800 A CN 103771800A CN 201410003457 A CN201410003457 A CN 201410003457A CN 103771800 A CN103771800 A CN 103771800A
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bayer
red mud
mixed
dry
masonry mortar
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CN201410003457.8A
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CN103771800B (en
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孙振平
孙栀子
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Tongji University
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Tongji University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention belongs to the technical field of building materials, and particularly relates to bayer process red mud-doped dry-blending masonry mortar and a using method thereof. The bayer process red mud-doped dry-blending masonry mortar comprises ordinary Portland cement, bayer process red mud, pulverized fuel ash, slag powder, cellulose ether, emulsion powder, ammonium polyacrylate, a water reducing agent and river sand. The bayer process red mud-doped dry-blending masonry mortar has the characteristics of good mobility, good water-retaining property, good adhesion, good strength development, small shrinkage, good durability and the like. The bayer process red mud-doped dry-blending masonry mortar is suitable for the bricklaying project of various brickworks for interior and exterior walls of buildings. The bayer process red mud-doped dry-blending masonry mortar has the advantages that the bayer process red mud can be effectively utilized, the added value of the bayer process red mud is increased, and the social benefits are improved; and meanwhile, the production cost of the masonry mortar is reduced, and the economic benefits are improved.

Description

A kind of dry-mixed masonry mortar and using method thereof that is mixed with Bayer process red mud
Technical field
The invention belongs to building material technical field, be specifically related to a kind of dry-mixed masonry mortar and using method thereof that is mixed with Bayer process red mud.
Background technology
Along with the develop rapidly of building trade, have higher requirement with energy-conserving and environment-protective to building materials quality is stable.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 masonry mortar water conservation rate variances in the market, shrink greatly, and cost is high, and these problems have limited the promotion and application of premixing masonry mortar.Therefore, develop quality good, the dry-mixed masonry 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 discharge red mud shape solid waste.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.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 littlely, and water retention is high, the dry-mixed masonry mortar that is mixed with Bayer process red mud and the using method thereof of good endurance.
A kind of dry-mixed masonry mortar that is mixed with Bayer process red mud that the present invention proposes, is made up of ordinary Portland cement, Bayer process red mud, flyash, slag powders, ether of cellulose, latex powder, polyacrylamide, water reducer and river sand, and the weight ratio of each component is:
Ordinary Portland cement 100
Bayer process red mud 15-35
Flyash 10-25
Slag powders 10-25
Ether of cellulose 0.05-0.15
Latex powder 1-4
Polyacrylamide 0.05-0.45
Water reducer 0.05-0.25
River sand 400-550.
Each component preferably weight ratio is:
Ordinary Portland cement 100
Bayer process red mud 20-30
Flyash 15-20
Slag powders 15-20
Ether of cellulose 0.06-0.09
Latex powder 2-3
Polyacrylamide 0.08-0.40
Water reducer 0.08-0.15
River sand 450-500.
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 (300-550) m 2/ kg, quality coefficient K is 1.2-1.7.
In the present invention, its particle diameter of described slag powders is (30-70) μ m, and the specific surface area of nitrogen determining adsorption is (200-400) m 2/ kg, quality coefficient K is 1.9-2.1.
In the present invention, described ether of cellulose is hydroxymethyl-propyl cellulose ether, 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 polyacrylamide molecular-weight average is between 4,000,000-2,000 ten thousand.
In the present invention, described water reducer is poly carboxylic acid series water reducer.
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 masonry mortar preparation method who is 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, slag powders, ether of cellulose, latex powder, ammonium polyacrylate, water reducer and river sand by aforementioned part by weight, drop into dry mixing device, by mechanical stirring evenly after, obtain desired product.
The using method of a kind of dry-mixed masonry mortar that is mixed with Bayer process red mud that the present invention proposes, concrete steps are as follows: accurately take the dry-mixed masonry 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 masonry 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 10%-15% of dry-mixed plastering mortar total mass.
In the present invention, ordinary Portland cement, Bayer process red mud, flyash and slag powders composition plural gel system, wherein ordinary Portland cement is main bonding component.
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.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, 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.Secondly, Bayer process red mud is because its particle diameter is little and specific surface area has greatly higher surfactivity, can active adsorption mixture in free water molecules, can effectively improve the serviceability of mortar mixture.In addition, Bayer process red mud powder hole is many, need water than feature high, strong retentiveness, the water requirement of Bayer process red mud masonry mortar mixture to be increased, and relatively improved the water retention property of 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.
Slag powders composition is similar to cement clinker, wherein SiO 2, CaO and Al 2o 3total content approximately reaches 90%, mainly exist with the vitreum form of silicate and aluminate, its median size is about (30-70) μ m, so activity is very high, and the strength development that the hydrated calcium silicate gel that its aquation generates and drated calcium aluminate gel can Promotion systems.
In the present invention, ether of cellulose, latex powder and polyacrylamide are the water-keeping thickening materials of dry-mixed masonry mortar, can improve toughness and the water-retentivity of mortar.
After ether of cellulose in mortar dissolves in water, be effectively uniformly distributed in system because surface-active action has guaranteed gelling material, 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 have the effect of bleed to sand-cement slurry.In mortar, introduce suitable bubble, due to " the ball effect " of bubble, the serviceability of mortar is improved.
Polyacrylamide is a kind of high score subclass water-keeping thickening material of commonly using, and compared with other high score subclass water-keeping thickening materials, polyacrylamide cost is lower and have a good water-keeping thickening effect.
In the present invention, adding of water reducer makes slurry have higher mobility and stability.
The present invention utilizes Bayer process red mud to prepare dry-mixed masonry mortar as adulterant.Product of the present invention, using ordinary Portland cement, Bayer process red mud, flyash and slag powders as gelling material, using ether of cellulose, latex powder and polyacrylamide as mortar water-keeping thickening material, for gathering materials, adds water reducer mix to form with river sand.Product of the present invention has good fluidity, good water-retaining property, glutinous poly-property is good, and strength development is good, shrink the characteristics such as little and good endurance.Product of the present invention not only can solve common dry-mixed masonry mortar water conservation rate variance, shrink large problem; Can also make full use of Bayer process red mud, turn waste into wealth, reduce masonry mortar preparation cost, increase economic efficiency; Meanwhile, can also alleviate Bayer process red mud and stack environmental pollution and the land wastage problem brought processed; In addition, the application of Bayer process red mud in masonry mortar, also can alleviate high-quality blended material problem in short supply in the market.
Embodiment
Further illustrate the present invention below by embodiment.
Embodiment 1, a kind of dry-mixed masonry mortar that is mixed with Bayer process red mud, by ordinary Portland cement 100, Bayer process red mud 15, flyash 10, slag powders 10, ether of cellulose 0.05, latex powder 1, polyacrylamide 0.05, the weight ratio of water reducer 0.05, river sand 400 is formulated.Add water and stir by 10% of dry-mixed masonry mortar total mass, obtain required product.The performance test results is in table 1.
Embodiment 2, a kind of dry-mixed masonry mortar that is mixed with Bayer process red mud, by ordinary Portland cement 100, Bayer process red mud 30, flyash 20, slag powders 15, ether of cellulose 0.08, latex powder 2, polyacrylamide 0.30, the weight ratio of water reducer 0.10, river sand 480 is formulated.Add water and stir by 12% of dry-mixed masonry mortar total mass, obtain required product.The performance test results is in table 1.
Embodiment 3, a kind of dry-mixed masonry mortar that is mixed with Bayer process red mud, by ordinary Portland cement 100, Bayer process red mud 35, flyash 25, slag powders 25, ether of cellulose 0.15, latex powder 4, polyacrylamide 0.45, the weight ratio of water reducer 0.25, river sand 550 is formulated.Add water and stir by 15% of dry-mixed masonry mortar total mass, 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) 80 78 75
Water retention (%) 93.2 93.9 94.6
Cohesive strength (MPa) 0.8 0.9 0.8
28d ultimate compression strength (MPa) 30.1 32.4 28.9
28d shrinking percentage (%) 0.046 0.042 0.048

Claims (12)

1. be mixed with a dry-mixed masonry mortar for Bayer process red mud, it is characterized in that being made up of ordinary Portland cement, Bayer process red mud, flyash, slag powders, ether of cellulose, latex powder, polyacrylamide, water reducer and river sand, the weight ratio of each component is:
Ordinary Portland cement 100
Bayer process red mud 15-35
Flyash 10-25
Slag powders 10-25
Ether of cellulose 0.05-0.15
Latex powder 1-4
Polyacrylamide 0.05-0.45
Water reducer 0.05--0.25
River sand 400-550.
2. a kind of dry-mixed masonry 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 20-30
Flyash 15-20
Slag powders 15-20
Ether of cellulose 0.06-0.09
Latex powder 2-3
Polyacrylamide 0.08-0.40
Water reducer 0.08-0.15
River sand 450-500.
3. a kind of dry-mixed masonry 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 masonry 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 masonry mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that its particle diameter of described flyash is (35-45) μ m, and the specific surface area of nitrogen determining adsorption is (300-550) m 2/ kg, quality coefficient K is 1.2-1.7.
6. a kind of dry-mixed masonry mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that its particle diameter of described slag powders is (30-70) μ m, and the specific surface area of nitrogen determining adsorption is (200-400) m 2/ kg, quality coefficient K is 1.9-2.1.
7. a kind of dry-mixed masonry 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.
8. a kind of dry-mixed masonry 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.
9. a kind of dry-mixed masonry mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that described modified polyacrylamide molecular weight is between 4,000,000-2,000 ten thousand.
10. a kind of dry-mixed masonry mortar that is mixed with Bayer process red mud according to claim 1, is characterized in that described modification water reducer is poly carboxylic acid series water reducer.
11. a kind of dry-mixed masonry mortars that are 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.
The using method of 12. 1 kinds of a kind of dry-mixed masonry mortars that are mixed with Bayer process red mud as claimed in claim 1, the amount of water while it is characterized in that construction application is the 10%-15% of dry-mixed masonry mortar total mass.
CN201410003457.8A 2014-01-06 2014-01-06 A kind of dry-mixed masonry mortar and using method thereof being mixed with Bayer process red mud Expired - Fee Related CN103771800B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104762953A (en) * 2015-04-20 2015-07-08 湖南省第六工程有限公司 Pier cushion cap foundation grouting construction technology
CN105236879A (en) * 2015-09-01 2016-01-13 同济大学 Masonry mortar doped with geopolymer and phosphorus slag powder and use method
CN108585714A (en) * 2018-06-21 2018-09-28 同济大学 It is a kind of using ardealite base hydraulicity composite gel material as the boundary mortar of agglutination material
CN108840641A (en) * 2018-09-10 2018-11-20 成都宏基建材股份有限公司 A kind of adhesive mortar and its preparation and application containing solid sulfur ash
CN110423178A (en) * 2019-08-30 2019-11-08 杨建强 A kind of xerosol quality guarantee aqua and the preparation method and application thereof based on changed red mud

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Publication number Priority date Publication date Assignee Title
CN102249570A (en) * 2011-05-05 2011-11-23 宋坤亮 Production method of red mud composite silicate masonry cement

Non-Patent Citations (1)

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Title
李利: "拜耳法赤泥干混砌筑砂浆的配制及性能研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》, no. 1, 15 January 2012 (2012-01-15), pages 027 - 320 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104762953A (en) * 2015-04-20 2015-07-08 湖南省第六工程有限公司 Pier cushion cap foundation grouting construction technology
CN105236879A (en) * 2015-09-01 2016-01-13 同济大学 Masonry mortar doped with geopolymer and phosphorus slag powder and use method
CN108585714A (en) * 2018-06-21 2018-09-28 同济大学 It is a kind of using ardealite base hydraulicity composite gel material as the boundary mortar of agglutination material
CN108840641A (en) * 2018-09-10 2018-11-20 成都宏基建材股份有限公司 A kind of adhesive mortar and its preparation and application containing solid sulfur ash
CN110423178A (en) * 2019-08-30 2019-11-08 杨建强 A kind of xerosol quality guarantee aqua and the preparation method and application thereof based on changed red mud

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