CN102173687B - Sulfate-corrosion-resistance concrete additive and preparation method thereof - Google Patents
Sulfate-corrosion-resistance concrete additive and preparation method thereof Download PDFInfo
- Publication number
- CN102173687B CN102173687B CN2011100469701A CN201110046970A CN102173687B CN 102173687 B CN102173687 B CN 102173687B CN 2011100469701 A CN2011100469701 A CN 2011100469701A CN 201110046970 A CN201110046970 A CN 201110046970A CN 102173687 B CN102173687 B CN 102173687B
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- China
- Prior art keywords
- sulfate
- concrete
- percent
- preparation
- cement clinker
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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 provides a sulfate-corrosion-resistance concrete additive and a preparation method thereof, belonging to the technical field of construction materials. The concrete additive is characterized by comprising the following raw material components in percentage by weight: 15 to 50 percent of silicate cement clinker, 40 to 80 percent of ground slag, 1 to 5 percent of zeolite powder, 1 to 3 percent of barium nitrate, 0.5 to 2 percent of polyoxyethylene ether, and 0.5 to 2 percent of vinyl resin, wherein the mixing amount of a gel material in the concrete is between 5 and 8 percent. The preparation method comprises the following steps of: uniformly mixing the barium nitrate, the polyoxyethylene ether and the vinyl resin according to proportions; grinding in a grinder to prepare mixture, wherein the degree of powder is between 400m<2>/kg and 500m2/kg; and uniformly mixing the mixture, the silicate cement clinker, the ground slag and the zeolite powder into a stirring vessel according to the proportions and evenly stirring to obtain the finished product. By the sulfate-corrosion-resistance concrete additive and the preparation method thereof, the sulfate corrosion resistance of concrete can be remarkably improved, the raw materials are easily obtained, and the preparation process is simple.
Description
Technical field
The invention belongs to building material technical field, being specifically related to a kind of is the concrete admixture and preparation method thereof of master's resisting erosion of sulfate with cement clinker and slag powders.
Background technology
Concrete becomes most widely used engineering materials because plurality of advantages is arranged.Yet because outside atmosphere is intricate, concrete structure is in the life-time service process, and non-mechanical failure highlights, because of the not enough variety of issue that causes of weather resistance is comed one after another.Because problem obviously comes across the coastland at first, old friends destroy for concrete weather resistance under the Coastal environments and have carried out big quantity research.For preventing villaumite to concrete destruction, existing at present a lot of methods, it is wherein a kind of using admixture, has invented the concrete admixture of a large amount of precenting chlorate corrosions now.
Along with the continuous quickening of Urbanization in China, the situation of an inch of land is an inch of gold has appearred in each large-and-medium size cities, and it is nervous that land resources has shown, the underground space be developed to the focus of paying close attention to for people.From traffic facilities such as subway, underpass to underground garage, underground square etc. uses the construction of facility, people constantly enlarge for the utilization of the underground space.Use concrete to be faced with the problem of weather resistance too in the underground space.Research shows that a large amount of Adding Mineral Admixtures can be improved the inside concrete pore structure, effectively strengthens concrete anti-permeability performance, thereby improves its weather resistance.But; The use of mineral admixture also has its limiting factor; Add various admixtures such as water reducer, air entrapment agent like needs and improve the performance of its concrete mix, may influence the performance of concrete others, a large amount of mineral admixture demands have also increased burden etc. to raw material supply.
Simultaneously, for the hinterland, the principal element of destroying concrete durability in the soil be vitriol for concrete erosion, this and coastland are different.Directly use and to obtain good effect to the concrete admixture of coastland chloride erosion.Based on above factor, we have invented concrete admixture of a kind of resisting erosion of sulfate and preparation method thereof to the characteristics of underground environment.
Summary of the invention
The objective of the invention is to propose concrete admixture of a kind of resisting erosion of sulfate and preparation method thereof to the deficiency of prior art and the characteristics of underground environment, its raw material obtains easily, and manufacture craft is simple, and effect is remarkable.
The technical scheme that realizes above-mentioned purpose is: a kind of concrete admixture of resisting erosion of sulfate and preparation thereof is characterized in that six kinds of feed composition and content is (all by weight percentage) as follows:
Cement clinker 15%-50%
Slag powders 40%-80%
Zeolite powder 1%-5%
Nitrate of baryta 1%-3%
Soxylat A 25-7 0.5%-2%
Vinylite 0.5%-2%
Wherein, said cement clinker is that fineness is greater than 350m
2/ kg, corresponding 28d ultimate compression strength reaches the above cement clinker of 45MPa; Said slag powders is the S95 grade slag powder, and technical indicator meets domestic GB/T18046-2000 standard; Said zeolite powder is an I level zeolite powder, and proportion is 1.2-1.4g/cm
3, silt content≤1.0%, unit weight 0.55-0.8g/cm
3, moisture≤1.5%, wear rate≤1.0%, sodium ion exchange capacity>=800g/cm
3Its preparation method is: nitrate of baryta, Soxylat A 25-7, Vinylite are mixed in proportion, place grinding machine for grinding, the powder degree reaches 400-500m
2More than/the kg.Then above-mentioned compound, cement clinker, slag powders, zeolite powder are put into stirred vessel in proportion, stir and to use.During use, volume is the 5%-8% of gelling material weight, and volume should be decided according to the demands of different and the environment for use of concrete performance.
The present invention do not fire, nontoxic, can be used for preparing pump concrete, chutable concrete, applied widely, can reduce the use of mineral admixture, do not influence the performance of concrete and mixture thereof.Simultaneously, concrete admixture each item index of resisting erosion of sulfate of the present invention meets " concrete sulfuric-resisting salt corrode sanitas " physicochemical property requirement in (JC/T1011-2006), and wherein the resisting erosion of sulfate coefficient can reach more than 0.90.The present invention can significantly improve concrete resisting erosion of sulfate ability, has high social and economic benefit.
Embodiment
Below in conjunction with embodiment the present invention is specified, but the present invention is not limited to following embodiment.With two groups of benchmark mortars that meet " concrete sulfuric-resisting salt corrodes sanitas " standard as a comparison, be numbered benchmark 1 and benchmark 2.
1. admixture is made
The fineness that A group cement clinker adopts east, Ji cement ltd to produce is 350m
2/ kg, corresponding 28d ultimate compression strength reaches the cement clinker of 45MPa.The fineness that B group cement clinker adopts east, Ji cement ltd to produce is 450m
2/ kg, corresponding 28d ultimate compression strength reaches the cement clinker of 55MPa.Other constituent materials is identical, and slag powders is the S95 grade slag powder that building materials chemical industry factory of Beijing Capital Iron and Steel produces, and technical indicator meets domestic GB/T18046-2000 standard; Zeolite powder is I level zeolite powder, and proportion is 1.2-1.4g/cm
3, silt content≤1.0%, unit weight 0.55-0.8g/cm
3, moisture≤1.5%, wear rate≤1.0%, sodium ion exchange capacity>=800g/cm
3The preparation method is: nitrate of baryta, Soxylat A 25-7, Vinylite are mixed in proportion, place grinding machine for grinding, the powder degree reaches 400-500m
2More than/the kg.Then above-mentioned compound, cement clinker, slag powders, zeolite powder are put into stirred vessel in proportion, stir.
Each component concentration such as table 1 (all by weight percentage):
Each component concentration of table 1
2. performance test
2.1 test materials: cement adopts the reference cement that meets GB 8076-2008 regulation.Sand adopts and meets GB/T17671-1999 specified standards sand.Test water meets JGJ 63 requirements.
2.2 testing method: use the admixture of making in 1. to test, volume is respectively 5%-8%.Concrete experimental technique all according to " concrete sulfuric-resisting salt corrodes sanitas " (JC/T1011-2006) in regulation carry out.
2.3 test result: the correlated performance index such as the table 2 of the concrete admixture of resisting erosion of sulfate of the present invention:
Table 2 correlated performance index
Can find out from above embodiment; Compare with the benchmark test specimen, the concrete admixture of resisting erosion of sulfate of the present invention can significantly improve coefficient against corrosion, reduces rate of expansion; Other index meets " concrete sulfuric-resisting salt corrodes sanitas " standard-required, and the resisting erosion of sulfate effect is remarkable.
Claims (3)
1. the concrete admixture of a resisting erosion of sulfate; It is characterized in that each feed composition and content are by weight percentage: Portland clinker 15%-50%, slag powders 40%-80%; Zeolite powder 1%-5%; Nitrate of baryta 1%-3%, Soxylat A 25-7 0.5%-2%, Vinylite 0.5%-2%; Said cement clinker is that fineness is greater than 350m
2/ kg, corresponding 28d ultimate compression strength reaches the above cement clinker of 45MPa; Said slag powders is the S95 grade slag powder.
2. the concrete admixture of a kind of resisting erosion of sulfate as claimed in claim 1 is characterized in that, said zeolite powder is an I level zeolite powder.
3. the preparation method of the concrete admixture of a kind of resisting erosion of sulfate as claimed in claim 1 is characterized in that, nitrate of baryta, Soxylat A 25-7, Vinylite are mixed in proportion, and places grinding machine for grinding to obtain compound, and the powder degree reaches 400-500m
2More than/the kg; Then above-mentioned compound, cement clinker, slag powders, zeolite powder are put into stirred vessel in proportion, stirring promptly gets product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100469701A CN102173687B (en) | 2011-02-25 | 2011-02-25 | Sulfate-corrosion-resistance concrete additive and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100469701A CN102173687B (en) | 2011-02-25 | 2011-02-25 | Sulfate-corrosion-resistance concrete additive and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102173687A CN102173687A (en) | 2011-09-07 |
| CN102173687B true CN102173687B (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100469701A Expired - Fee Related CN102173687B (en) | 2011-02-25 | 2011-02-25 | Sulfate-corrosion-resistance concrete additive and preparation method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011652B (en) * | 2012-12-27 | 2014-08-13 | 同济大学 | Microbial microcapsule anti-sulfate erosion system of structural concrete |
| CN104829170B (en) * | 2015-01-05 | 2017-05-10 | 潍坊德霖建材科技有限公司 | Preparation method of high-performance anti-corrosion repairing mortar |
| CN106747126A (en) * | 2017-02-20 | 2017-05-31 | 内蒙古科技大学 | A kind of slag concrete of anti-sulfur dioxide corrosion |
| CN109650769B (en) * | 2019-02-18 | 2021-08-20 | 天津市建筑材料科学研究院有限公司 | Sulfate-corrosion-resistant concrete admixture and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986475A (en) * | 2005-12-20 | 2007-06-27 | 方兴中 | Concrete admixture resisting sea water erosion |
| CN101172803A (en) * | 2007-10-26 | 2008-05-07 | 北京工业大学 | Composite additive improving self-contraction of concrete |
| CN101391875A (en) * | 2008-10-30 | 2009-03-25 | 安徽淮河化工股份有限公司 | High-early strength type additive special for shaft slipform construction concrete |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4933095B2 (en) * | 2005-12-27 | 2012-05-16 | 住友大阪セメント株式会社 | Cement composition, cement milk, water retentive pavement, and method for constructing water retentive pavement |
| JP2009215108A (en) * | 2008-03-11 | 2009-09-24 | Etsuro Sakagami | Solidifying agent and method for producing the same |
-
2011
- 2011-02-25 CN CN2011100469701A patent/CN102173687B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986475A (en) * | 2005-12-20 | 2007-06-27 | 方兴中 | Concrete admixture resisting sea water erosion |
| CN101172803A (en) * | 2007-10-26 | 2008-05-07 | 北京工业大学 | Composite additive improving self-contraction of concrete |
| CN101391875A (en) * | 2008-10-30 | 2009-03-25 | 安徽淮河化工股份有限公司 | High-early strength type additive special for shaft slipform construction concrete |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2007-176721A 2007.07.12 |
| JP特开2009-215108A 2009.09.24 |
| 吴方贵,黄海斌.商品混凝土应用掺合料、外加剂配料的研究与注意事项.《2009"中国商品混凝土可持续发展论坛暨第六届全国商品混凝土技术与管理交流大会论文集》.2009,全文. * |
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Effective date of registration: 20190104 Address after: 410203 No. 699 Huaguo Road, Tongguan Circulation Industrial Park, Wangcheng District, Changsha City, Hunan Province Patentee after: Hunan New Oriental Ecological Agricultural Science and Technology Development Co., Ltd. Address before: No. 100, Chaoyang District flat Park, Beijing, Beijing Patentee before: Beijing University of Technology |
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Granted publication date: 20120711 Termination date: 20190225 |