CN104446218A - Method for improving anti-carbonization property of concrete - Google Patents
Method for improving anti-carbonization property of concrete Download PDFInfo
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- CN104446218A CN104446218A CN201410761773.1A CN201410761773A CN104446218A CN 104446218 A CN104446218 A CN 104446218A CN 201410761773 A CN201410761773 A CN 201410761773A CN 104446218 A CN104446218 A CN 104446218A
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- concrete
- metakaolin
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- cement
- water
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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
Abstract
The invention discloses a method for improving the anti-carbonization property of concrete. When concrete is prepared, exfoliated metakaolin and coal ash are mixed to cement, and the water-binder ratio of the concrete is controlled to be less than 0.31. Through tests with different water-binder ratios, different mixing amounts of the coal ash and different mixing amounts of the metakaolin, the anti-carbonization property of the concrete becomes worse as the water-binder ratio is higher, the anti-carbonization property drops at the beginning and rises later as the mixing amount of the coal ash is higher, and the anti-carbonization property becomes higher as the mixing amount of the metakaolin is higher; in every 100 parts of the obtained cement, the exfoliated metakaolin accounts for 15 parts and the coal ash accounts for 10 parts; and meanwhile, the water-binder ratio is controlled to be less than 0.31, so that the best anti-carbonization property of the concrete is achieved.
Description
Technical field
The present invention relates to a kind of method improving agent on crack resistance of concrete carbonation properties, belong to building material field.
Background technology
Concrete, as indispensable in civil engineering work, purposes material of construction the most widely, all causes a large amount of concerns of scientific researchers all the time, particularly in concrete weather resistance, application property, intensity etc., has all carried out large quantifier elimination.Along with the development of concrete technology, improving concrete weather resistance is the important topic that countries in the world Materials science worker constantly studies, explores.The problems such as water quality corrodes, cavitation corrosion is washed away, freeze thawing, infiltration, wearing and tearing, concrete carbonization, steel bar corrosion cause great harm can to the safety of buildings.Concrete is from when building, and be just subject to the destructions such as carbonization, Plant ecology reflection, freeze injury, salt damage, wherein carbonization phenomenon is the most common.After concrete is carbonized, concrete basicity can be reduced, cause the ductility of its structure to reduce.There are some researches show: if concrete hole is less, degree of compactness is higher, alkaline matter content is larger, anti-carbonation properties is better.Concrete carbonization is a kind of chemical corrosion, can start with and carry out study on the modification, comprise water cement ratio, cement consumption and kind, aggregate kind and grating, flyash, admixture etc. from constituent materials aspect.
The kaolinic rich reserves of China, occupy the world the 5th, but be also only nearly decades to its exploitation, current kaolin is widely used in the fields such as coating, papermaking, plastics, rubber, high grade refractory, and the application report of kaolin in concrete is few at present.Twentieth century seventies, Davidovits and his colleague of France use alkali-activated carbonatite metakaolin, form a kind of Novel alkali gelling material, be called Geopolymers, it is a kind of high reactivity pozzolanic material, react with Ca (OH) 2, product and the cement of generation are similar, can use as gelling material; This novel material due to its pozzolanic activity and silicon ash similar, therefore also can as mineral admixture.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, provides a kind of method improving agent on crack resistance of concrete carbonation properties.
Object of the present invention carrys out specific implementation by the following technical programs:
Improve a method for agent on crack resistance of concrete carbonation properties, when preparing concrete, in cement, mix metakaolin of delaminating, flyash, and control water-binder ratio below 0.31.
Described metakaolin of delaminating obtains as follows:
Kaolin is delaminated naturally, washes 2 ~ 3 times, filtration, 100 DEG C of oven dry.
Preferably, every 100 parts of cement, mix metakaolin 15 parts of delaminating, and mix 10 parts, flyash.
Beneficial effect of the present invention:
The present invention is by testing when different water-binder ratios, different doping quantity of fly ash, different metakaolin volume, and draw: water-cement ratio is larger, agent on crack resistance of concrete carbonation properties is poorer; Doping quantity of fly ash is larger, and carbonation properties starts to reduce the later stage and improves; Metakaolin volume is larger, and anti-carbonation properties is also more and more higher.Finally obtain every 100 parts of cement, mix metakaolin 15 parts of delaminating, mix 10 parts, flyash, and control water-cement ratio simultaneously below 0.31, the concrete anti-carbonation properties obtained is best.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
embodiment 1:
Improve a method for agent on crack resistance of concrete carbonation properties, when preparing concrete, in cement, mix metakaolin of delaminating, flyash, and control water-binder ratio below 0.31.Every 100 parts of cement, mix metakaolin 15 parts of delaminating, and mix 10 parts, flyash.
Described metakaolin of delaminating obtains as follows:
Kaolin is delaminated naturally, washes 2 ~ 3 times, filtration, 100 DEG C of oven dry.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. improve a method for agent on crack resistance of concrete carbonation properties, it is characterized in that: when preparing concrete, in cement, mix metakaolin of delaminating, flyash, and control water-binder ratio below 0.31.
2. the method for raising agent on crack resistance of concrete carbonation properties according to claim 1, is characterized in that: described in metakaolin of delaminating obtain as follows:
Kaolin is delaminated naturally, washes 2 ~ 3 times, filtration, 100 DEG C of oven dry.
3. the method for raising agent on crack resistance of concrete carbonation properties according to claim 1, is characterized in that: every 100 parts of cement, mixes metakaolin 15 parts of delaminating, mixes 25 parts, flyash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410761773.1A CN104446218A (en) | 2014-12-12 | 2014-12-12 | Method for improving anti-carbonization property of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410761773.1A CN104446218A (en) | 2014-12-12 | 2014-12-12 | Method for improving anti-carbonization property of concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104446218A true CN104446218A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410761773.1A Pending CN104446218A (en) | 2014-12-12 | 2014-12-12 | Method for improving anti-carbonization property of concrete |
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| CN (1) | CN104446218A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437811A (en) * | 2018-11-20 | 2019-03-08 | 安徽理工大学 | A method of enhancing alkali-activated carbonatite concrete resisting carbonization |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720158A (en) * | 2012-05-21 | 2012-10-10 | 浙江大学 | Unidirectional keel embedded assembled anti-cracking impermeable permanent formwork |
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2014
- 2014-12-12 CN CN201410761773.1A patent/CN104446218A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720158A (en) * | 2012-05-21 | 2012-10-10 | 浙江大学 | Unidirectional keel embedded assembled anti-cracking impermeable permanent formwork |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437811A (en) * | 2018-11-20 | 2019-03-08 | 安徽理工大学 | A method of enhancing alkali-activated carbonatite concrete resisting carbonization |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |
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| RJ01 | Rejection of invention patent application after publication |