CN1003300B - Anticorrosive magnesia cement - Google Patents
Anticorrosive magnesia cement Download PDFInfo
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- CN1003300B CN1003300B CN87103530.8A CN87103530A CN1003300B CN 1003300 B CN1003300 B CN 1003300B CN 87103530 A CN87103530 A CN 87103530A CN 1003300 B CN1003300 B CN 1003300B
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- anticorrosive
- magnesia cement
- cement
- corrosion
- magnesium chloride
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Abstract
The present invention relates to anticorrosive magnesia cement which is suitable for the construction in salt fields and the building construction in places with the existence of chlorides, sulphates and carbonate solution media. The anticorrosive magnesia cement of the present invention is composed of magnesite, ordinary sand, anticorrosive additives and magnesium chloride solution. The anticorrosive magnesia cement of the present invention has the advantages of wide raw material sources, low cost, high anticorrosion, high compression resistance and folding resistance intensity, etc.
Description
The invention belongs to novel corrosion-resistant material of construction.
General magnesium cement can be extremely low to the corrosion-resistant of muriate, vitriol and carbonate solution medium.Build the regional building construction that reaches having muriate, vitriol and carbonate solution medium to exist at present both at home and abroad in the salt pan and all need the strong magnesium cement of a kind of corrosion-resistant.In order to solve the problem that magnesium cement corrosion-resistant can be low, the Soviet Union 503830 and No. 767052 patents have proposed in magnesium cement component the additive of two fluosite, yuban, aniline, polyvinyl acetate emulsoid and organic silicone oil and so between adding benzene.Though after adding this class additive; the corrosion-resistant of magnesium cement can be increased; but owing to add this class organic additive; the protective membrane that magnesium cement is formed is easy to wear out; very easily break, cause magnesium cement corrosion-resistant to weaken final strength degradation; and organic additive price height, be unsuitable for industrial production and use on a large scale.The present invention proposes to add the additive of silicate and phosphoric acid salt and so on to improve the corrosion-resistant of magnesium cement at above-mentioned shortcoming in magnesium cement component.
Main points of the present invention are that the constituent of magnesium cement is is that magnesium chloride solution 75-100 part of 1.20 is formed by containing 100 parts of the magnesian magnesias of 65-75% (calculate by weight, below all with), normal sands 100-300 part, corrosion-resistant additive 1-30 part and proportion.
The used magnesia of the present invention is obtained by the magnesite calcining, and calcining temperature is preferably between 750-850 ℃.Magnesium chloride converts by Magnesium Chloride Anhydrous and is equivalent to magnesian 25-35%.When the consumption of magnesium chloride was less than 25%, early strength was little after the magnesium hardening of cement, and superfluous magnesium oxide floats on magnesium hardening of cement surface, caused the dry linting phenomenon.When the consumption of magnesium chloride surpassed 35%, magnesium hardening of cement body also can produce so-called " sweating " phenomenon.Normal sands is as supporting material.
When in magnesium cement is formed, adding a certain amount of corrosion-resistant additive, magnesium cement is significantly improved to the chemical stability of bittern water and other basic solution.This corrosion-resistant additive is by compositions such as 100 parts of cinders (calculate by weight, below all with), iron-containing slag 10-30 part, calcium superphosphate 50-100 part, water 200-300 parts.The main raw material for preparing this additive is an industrial residue, so raw material gathers materials on the spot easily, and cost is lower, has industrial applicibility.
Magnesium cement of the present invention can pour into difform solid.Its technical process is the magnesium cement slurry injection model that will mix, kept 8-12 hour the demoulding then, the maintenance seven days under this temperature of the hard solid after the demoulding at 20 ± 2 ℃, its intensity can reach 70% of 28 days final strengths, so the maintenance at room temperature of the hard solid of magnesium cement can be used in seven days.The contriver once used 28 days 4 * 4 * 16 centimetres standard test block of maintenance at room temperature to carry out strength detection with WB3-82 standard resistance to compression method, and it the results are shown in Table 1;
The hard solid of magnesium cement that the contriver will not add the corrosion-resistant additive is immersed in respectively in muriate, vitriol and three kinds of dissimilar bittern waters of carbonate, after soaking January, observe the test block be full of cracks, qualitative change is soft, be loose shape, can't take a sample and carry out performance measurement.The hard solid of magnesium cement that evidence does not add additive is extremely low to the chemical stability of muriate, vitriol and carbonate type bittern water.Muriate, vitriol and three kinds of dissimilar bittern waters of carbonate are put in the hard solid test block of magnesium cement that will add the corrosion-resistant additive equally respectively, after soaking six months, measure its intensity with WB3-82 standard resistance to compression method, the results are shown in Table 2:
The contriver carries out the above-mentioned magnesium cement standard test block that is immersed in the bittern water under field conditions (factors) resisting temperature and changes test.Range of temperature after six months temperature variation, is measured with WB3-82 standard resistance to compression method between-17C-30C, and its ultimate compression strength is 756 kilograms per centimeter
2, folding strength is 189 kilograms per centimeter
2
The present invention is the material of construction on a kind of comparatively ideal salt pan structured material and the salt lake.It is applicable to that also the chemical enterprise of muriate, vitriol and carbonate solution medium existence is as impregnating material.Advantages such as compared with the prior art, it is extensive to have raw material sources, and cost is lower, and corrosion-resistant can be high, and resistance to compression, folding strength are big.
The contriver once made a plurality of embodiment, took a single example below.
Example 1
By 100 parts of the magnesias that contains 65-75%MgO (calculate by weight, below all with), 200 parts of normal sands, 10 parts of corrosion-resistant additives, proportion
The intensity of the hard solid of table 1 magnesium cement maintenance in air
| Classification | 28 days intensity (kilograms per centimeter of maintenance in air 2） | Void content (%) | |
| Resistance to compression | Anti-folding | ||
| No additive | 726 | 182 | 6-8 |
| Additive is arranged | 740 | 181 | 6-8 |
The hard solid of table 2 magnesium cement soaks the intensity after June in bittern water
| The bittern water classification | Bittern water pH value | In bittern water, soak the intensity (kilograms per centimeter in June 2） | |||||
| Resistance to compression | Anti-folding | ||||||
| January | March | June | January | March | June | ||
| The chlorination type | 6.18 | 751 | 753 | 760 | 172 | 198 | 244 |
| Sulfate type | 7.35 | 630 | 625 | 669 | 116 | 104 | 124 |
| Carbonate type | 11.44 | 588 | 583 | 629 | 79 | 76 | 87 |
| The bittern water classification | Bittern water pH value | In bittern water, soak the intensity (kilograms per centimeter in June 2） | |||||
| Resistance to compression | Anti-folding | ||||||
| January | March | June | January | March | June | ||
| The chlorination type | 6.18 | 751 | 753 | 760 | 172 | 198 | 244 |
| Sulfate type | 7.35 | 630 | 625 | 669 | 116 | 104 | 124 |
| Carbonate type | 11.44 | 588 | 583 | 629 | 79 | 76 | 87 |
Be 100 parts of magnesium cement slurries that mix of magnesium chloride solution of 1.20, be shaped to 4 * 4 * 16 centimetres of standard test blocks.Under 20 ± 2 ℃ of temperature, kept 8-12 hour the demoulding then, the hard solid maintenance at room temperature of the magnesium cement after the demoulding 28 days.Again test block is immersed in respectively in muriate, vitriol and three kinds of dissimilar bittern waters of carbonate, after soaking June, measures result such as following table with WB3-82 standard resistance to compression method:
Claims (4)
1, a kind of anticorrosive magnesia cement of forming by magnesia, normal sands, corrosion-resistant additive and magnesium chloride solution, feature of the present invention is that the ratio of components of anticorrosive magnesia cement is: 100 parts of magnesias, normal sands 100-300 part, corrosion-resistant additive 1-30 part and magnesium chloride solution 75-100 part (more than calculate by weight, below all with).
2,, it is characterized by the corrosion-resistant additive and form by 100 parts of cinders, iron-containing slag 10-30 part, calcium superphosphate 50-100 part, water 200-300 part according to the described anticorrosive magnesia cement of claim 1.
3,, it is characterized in that described magnesia is to be calcined through temperature by magnesite to form, and contains magnesium oxide 65-75% between 750-850 ℃ according to the described anticorrosive magnesia cement of claim 1.
4, according to the described anticorrosive magnesia cement of claim 1, it is characterized in that magnesium chloride is equivalent to magnesian 25-35% by the Magnesium Chloride Anhydrous conversion, the proportion of magnesium chloride solution is 1.20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87103530.8A CN1003300B (en) | 1987-05-12 | 1987-05-12 | Anticorrosive magnesia cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87103530.8A CN1003300B (en) | 1987-05-12 | 1987-05-12 | Anticorrosive magnesia cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87103530A CN87103530A (en) | 1987-11-25 |
| CN1003300B true CN1003300B (en) | 1989-02-15 |
Family
ID=4814473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87103530.8A Expired CN1003300B (en) | 1987-05-12 | 1987-05-12 | Anticorrosive magnesia cement |
Country Status (1)
| Country | Link |
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| CN (1) | CN1003300B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104446312A (en) * | 2014-11-27 | 2015-03-25 | 中国科学院青海盐湖研究所 | Outer wall coating material and preparation method thereof |
| CN106747231A (en) * | 2015-11-30 | 2017-05-31 | 中国科学院青海盐湖研究所 | A kind of magnesium oxysulfide concrete concrete material and preparation method thereof |
| CN106747236A (en) * | 2015-11-30 | 2017-05-31 | 中国科学院青海盐湖研究所 | A kind of magnesium oxysulfide concrete concrete material and preparation method thereof |
| CN106810190A (en) * | 2015-11-30 | 2017-06-09 | 中国科学院青海盐湖研究所 | A kind of novel corrosion-resistant corrosion concrete material and preparation method thereof |
| CN106810191A (en) * | 2015-11-30 | 2017-06-09 | 中国科学院青海盐湖研究所 | A kind of water-resistance magnesium oxysulfide concrete concrete material and preparation method thereof |
| CN106747235A (en) * | 2015-11-30 | 2017-05-31 | 中国科学院青海盐湖研究所 | A kind of water-resistance magnesium oxysulfide concrete concrete material and preparation method thereof |
| CN106747234A (en) * | 2015-11-30 | 2017-05-31 | 中国科学院青海盐湖研究所 | A kind of magnesium oxysulfide concrete concrete material and preparation method thereof |
| CN106747233A (en) * | 2015-11-30 | 2017-05-31 | 中国科学院青海盐湖研究所 | A kind of novel corrosion-resistant corrosion concrete material and preparation method thereof |
| CN106747237A (en) * | 2015-11-30 | 2017-05-31 | 中国科学院青海盐湖研究所 | A kind of novel corrosion-resistant corrosion concrete material and preparation method thereof |
| CN106747232A (en) * | 2015-11-30 | 2017-05-31 | 中国科学院青海盐湖研究所 | A kind of water-resistance magnesium oxysulfide concrete concrete material and preparation method thereof |
| CN105330187B (en) * | 2015-11-30 | 2017-07-18 | 中国科学院青海盐湖研究所 | One kind improves magnesia oxychloride cement intensity method |
| CN105367037B (en) * | 2015-11-30 | 2017-09-22 | 中国科学院青海盐湖研究所 | One kind improves magnesia oxychloride cement intensity method |
-
1987
- 1987-05-12 CN CN87103530.8A patent/CN1003300B/en not_active Expired
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| Publication number | Publication date |
|---|---|
| CN87103530A (en) | 1987-11-25 |
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