CN1309677C - Corrosion-resisting high-performance concrete suitable for sewage works and its preparation method - Google Patents
Corrosion-resisting high-performance concrete suitable for sewage works and its preparation method Download PDFInfo
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- CN1309677C CN1309677C CNB2005100293342A CN200510029334A CN1309677C CN 1309677 C CN1309677 C CN 1309677C CN B2005100293342 A CNB2005100293342 A CN B2005100293342A CN 200510029334 A CN200510029334 A CN 200510029334A CN 1309677 C CN1309677 C CN 1309677C
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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 present invention belongs to the technical field of building materials, and more specifically relates to corrosion-resisting high-performance concrete suitable for being used for sewerage works, and a manufacture method thereof. The concrete of the present invention is composed of skeletal materials, water, cement, slag miropowder, high grade flyash, high-performance mineral additives and water reducing agents according to appropriate weight ratio. The corrosion-resisting high-performance concrete can totally accord with the requirements of environment design and construction of the sewage work application in three performances of pouring durability, intensity and pourability, and can ensure that the concrete engineering structure can be used safely in a long term.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of resistant aqueous corrosion type high performance concrete and preparation method thereof.
Background technology
Mainly adopt following two big class methods aspect the concrete sewage disposal both at home and abroad at present, improving the corrosion of concrete opposing corrosive medium:
1. improve corrosion resistance nature in concrete surface spraying waterborne polymeric sand-cement slurry.
2. with polyurethane anticorrosive coating be coated with concrete surface, the method that is coated with steel surface with the cross-linking highly chlorinated polyethylene anticorrosive coating improves the concrete of sewerage and the corrosion resistance of steel structure.
It is higher that aforesaid method exists cost; the problem of construction trouble; technology of high performance concrete in the present age (promptly building the concrete technology that weather resistance, intensity, pourability three aspect performances can guarantee that concrete works structure long-term safety is used) has had development rapidly, according to the environment for use design of concrete works and make the core place that durable concrete has become modern coagulation technology exploitation.
Usually corrosive medium is broadly divided into the three major types type to the corrosion that concrete produces, that is:
1, the swelling cracking type destroys
Sulfate ion infiltrates pore or the microfracture that exists in the concrete, causes expansion stress with the drated calcium aluminate reaction of calcium hydroxide, high basicity, causes concrete cracking to destroy.
2, lysotype is destroyed
The hydrogen ion that exists in the solution, bicarbonate ion, magnesium ion etc. and hydrated cementitious product generation chemical reaction cause hydrated product dissolving, concrete quality to become loose and destroyed, and this is a destructive process from outward appearance to inner essence.
3, Rust of Rebar in Concrete causes that concrete cracking destroys
Because of infiltrating, carbanion in carbon dioxide or the solution causes the concrete neutralisation, cause rebar passivation film to destroy, the meeting of Shen Ruing simultaneously causes that the ion (as chlorion) of galvanic corrosion makes the reinforcing bar oxidation corrosion produce expansion stress, causes concrete cracking to destroy.
Owing to use number of chemical material and microorganism in the sewage treatment project, can make multiple materials such as having sulfate ion, chlorion, bicarbonate ion, magnesium ion in the solution can produce the material of chemical reaction with concrete.And the participation of microorganism, make that above-mentioned anti-strained is more complicated.
Summary of the invention
The objective of the invention is to propose good concrete of a kind of corrosion resistance nature that is applicable to sewerage and preparation method thereof.
The present invention selects the starting material of quality concrete for use, as sandstone aggregate of cement of high index, high-quality fly ash, high-quality blast-furnace cinder micro-powder, high efficiency water reducing agent, appointment specification etc., and high performance concrete compounding process, according to design of sewerage environment for use and the better concrete works of construction erosion resistance, prolong the sewerage life-span, realize long-term stability and safe operation.
The corrosion-resistant high performance concrete that the present invention proposes comprises aggregate, water, gelling material, obtains by common weight proportion is mixed, and wherein, the weight proportion of gelling material component is as follows:
Cement 27.3%～32.1%
Mineral admixture: 72.7%～67.9%;
Wherein, the weight proportion of mineral admixture component is:
Slag micropowder (S95): 40%～58%
Flyash: 39%～47%
Mineral additive (JEA): 0%～8%, preferred 3%～7%;
In addition, be added with water reducer (RH1100), consumption is 0.8%～1.2% of a mineral admixture weight.
Among the present invention, described aggregate is divided into two kinds of coarse aggregate and fine aggregates, and wherein, coarse aggregate adopts the rubble of particle diameter less than 25mm, and it is the river sand of 2.6-3.0 that fine aggregate adopts fineness modulus.These aggregates are materials of non-activity mineral.Easily the concrete in the environment of generation basic active aggregate reaction must use the aggregate of non-activity mineral.
Among the present invention, described cement adopts silicate cement or ordinary Portland cement.Especially select the cement of high grade for use.For the concrete in the environment of easy generation basic active aggregate reaction, must use low alkali cement.
Among the present invention, described slag micropowder can be selected the levigate blast furnace slag powder of S95 level for use, and flyash can be selected the selection by winnowing flyash or the fine-ground fly-ash of the suboxide calcium contents of GB 1596 first grade or seconds index for use.
Among the present invention, described water reducer adopts naphthalenesulfonate formaldehyde condensation compound (being RH1100).
The present invention also proposes above-mentioned concrete preparation method, and its step is as follows: described aggregate, cement, mineral admixture are added in the stirrer by aforementioned part by weight, stir mixed; Then water and water reducer are added in the stirrer simultaneously, continue to stir; Carry out the required structures of construction casting then.
Advantage of the present invention is: weak acid medium that produces in treating processes according to the inorganic salt of throwing in the municipal sewage treatment process, chlorion and sewage etc. is to the mechanism of corrosion of concrete material, the technology of utilization high performance concrete, proposition are fit to the preparation program of the corrosion-resisting high-performance concrete of design strength grade more than C40 of sewage treatment project application.Municipal effluent soak test by 150 times in 3% sodium sulfate, 2% sal epsom, artificial seawater, enrichment; and Performance Detection such as chloride permeability, electrochemically resistant burn into artificial seawater freeze thawing 300 inferior concrete chemical resistances and protection reinforcing bar function, prove that it is a kind of new concrete material that the sewage treatment structure engineering is used that is suitable for.
Embodiment
Introduce embodiments of the present invention below.
1, concrete proportioning and making
The part by weight of various gelling material is as follows in the C40 corrosion-resisting high-performance concrete:
52.5P II cement: 27.3%～32.1%, mineral admixture: 72.7%-67.9%.In the mineral admixture, slag micropowder (S95): 40%～58%, fine-ground fly-ash: 39%～47%, mineral additive (JEA): 0%～8%, in addition, water reducer (RH1100) is 0.8%～1.2% of a mineral admixture weight.
By aforesaid preparation process, various materials stirrings are mixed, build then.
2, concrete performance
Concrete workability: meet concrete and concentrate stirring station to produce premixed and pumped concrete technology requirement.
Concrete preparation strength (the 28d mark is supported): greater than 45MPa.
3, concrete maintenance
By existing cement concrete construction technical requirement, the concrete placement surface should hide and keep moistening, and the necessary moisture-keeping maintaining of the concrete of newly building is more than 14 days; Winter construction must be strengthened the heat and moisture preserving maintenance, prolongs curing time; The superstructure engineering on concrete finish surface and the demoulding surface spray autocratic SZY conservation layer immediately, the SZY conservation layer is by two coatings---undercoat and finishing coat constitute.
4, concrete corrosion resistant index
3% metabisulfite solution K1 and K3 all are not less than 0.85;
2% Adlerika K1 and K3 all are not less than 0.85;
Artificial seawater (ASTM D114) K1 and K3 all are not less than 0.85;
Enrichment artificial sewage reference liquid (temperature: 35-37 ℃) K1 and K3 all are not less than 1.00.
Above K1 is for soaking the anti-corrosion coefficient in the 28 days length of time, and K3 is for soaking the anti-corrosion coefficient in the 84 days length of time.
5, mechanical performance of concrete index (behind the spraying SZY conservation layer)
At curing room air care 7 days, ultimate compression strength 33.8MPa;
Maintenance is 14 days in curing room water, ultimate compression strength 48.43MPa;
Maintenance is 28 days in the curing room air, ultimate compression strength 50.6MPa.
The concrete weight proportion of above-mentioned concrete gelling material can be done corresponding selection according to the needs of different engineerings.
Claims (5)
1, a kind of corrosion resistant type concrete that is suitable for sewerage comprises aggregate, water and gelling material, obtains than mixed by common reprovision, it is characterized in that:
The weight proportion of gelling material component is as follows:
Cement 27.3%～32.1%
Mineral admixture: 72.7%～67.9%;
Wherein, the weight proportion of mineral admixture component is:
Slag micropowder: 40%～58%
Flyash: 39%～47%
Mineral additive: 0%～8%,
In addition, be added with water reducer, consumption is 0.8%～1.2% of a mineral admixture weight.
2, concrete according to claim 1 is characterized in that described aggregate is divided into two kinds of coarse aggregate and fine aggregates, and wherein, coarse aggregate adopts the rubble of particle diameter less than 25mm, and it is the river sand of 2.6-3.0 that fine aggregate adopts fineness modulus.
3, concrete according to claim 1 is characterized in that described cement adopts silicate cement or ordinary Portland cement.
4, concrete according to claim 1 is characterized in that described slag micropowder selects the levigate blast furnace slag powder of S95 level for use, and flyash is selected the selection by winnowing flyash or the fine-ground fly-ash of GB1596 first grade or seconds index for use.
5, a kind of concrete preparation method as claimed in claim 1 is characterized in that described aggregate, cement, mineral admixture are added in the stirrer by described part by weight, stirs mixed; Then water and water reducer are added in the stirrer simultaneously, continue to stir; Carry out the required structures of construction casting then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100293342A CN1309677C (en) | 2005-09-01 | 2005-09-01 | Corrosion-resisting high-performance concrete suitable for sewage works and its preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100293342A CN1309677C (en) | 2005-09-01 | 2005-09-01 | Corrosion-resisting high-performance concrete suitable for sewage works and its preparation method |
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| Publication Number | Publication Date |
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| CN1769235A CN1769235A (en) | 2006-05-10 |
| CN1309677C true CN1309677C (en) | 2007-04-11 |
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| CNB2005100293342A Active CN1309677C (en) | 2005-09-01 | 2005-09-01 | Corrosion-resisting high-performance concrete suitable for sewage works and its preparation method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880144B (en) * | 2009-05-07 | 2013-08-28 | 中冶天工上海十三冶建设有限公司 | Composition of mass pumping heat resistant concrete for blast furnace |
| CN102001845A (en) * | 2010-03-29 | 2011-04-06 | 中国铁道科学研究院铁道建筑研究所 | Concrete composite containing silicon micro powder and preparation method thereof |
| CN102690089B (en) * | 2012-06-13 | 2014-02-12 | 江苏建筑职业技术学院 | Self-compaction fair-faced concrete with strength grade of C50 |
| CN107902991A (en) * | 2017-11-17 | 2018-04-13 | 天津海得润滋建材有限公司 | High performance concrete mixture |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055531A (en) * | 1991-04-06 | 1991-10-23 | 武汉工业大学 | High strength composite gelatinizing material |
| CN1085195A (en) * | 1993-09-02 | 1994-04-13 | 运城市地方国营水泥厂 | Powdered coal ash-slag cement and manufacture method thereof |
| WO1997007072A1 (en) * | 1995-08-14 | 1997-02-27 | Chichibu Onoda Cement Corporation | Curable composition and cured article |
-
2005
- 2005-09-01 CN CNB2005100293342A patent/CN1309677C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055531A (en) * | 1991-04-06 | 1991-10-23 | 武汉工业大学 | High strength composite gelatinizing material |
| CN1085195A (en) * | 1993-09-02 | 1994-04-13 | 运城市地方国营水泥厂 | Powdered coal ash-slag cement and manufacture method thereof |
| WO1997007072A1 (en) * | 1995-08-14 | 1997-02-27 | Chichibu Onoda Cement Corporation | Curable composition and cured article |
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