CN105367036A - Low-temperature magnesium oxychloride cement and preparation method therefor - Google Patents
Low-temperature magnesium oxychloride cement and preparation method therefor Download PDFInfo
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- CN105367036A CN105367036A CN201510859860.5A CN201510859860A CN105367036A CN 105367036 A CN105367036 A CN 105367036A CN 201510859860 A CN201510859860 A CN 201510859860A CN 105367036 A CN105367036 A CN 105367036A
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Abstract
The invention relates to the technical field of cement preparation and particularly relates to a preparation method for low-temperature magnesium oxychloride cement. The preparation method comprises the steps of: mixing magnesium oxide, magnesium chloride and water in a ratio of amount of substance: (3-9):1:(11-20) to form slurry; adding an additive into the slurry to form mud; and maintaining the mud for over three days to obtain the low-temperature magnesium oxychloride cement, wherein the additive is 0.5-2 times of magnesium oxide in mass; the additive is selected from one or more of sodium tetraborate, tri(hydroxymethyl) amino methane, tartaric acid, boric acid, ammonium borate, ammonium dihydrogen phosphate, calcium acetate, urea, zinc chloride, chitosan, benzoic acid, aluminum trichloride and sodium silicate. The low-temperature magnesium oxychloride cement provided by the invention is low in heat release temperature, and the heat release process is stable and uniform, so that the quality of a cement product is favorably improved.
Description
Technical field
The present invention relates to cement preparing technical field, especially the improvement opportunity of magnesia oxychloride cement.
Background technology
Magnesia oxychloride cement is that the one of being invented in 1867 by French scientist sorel is fast firmly, morning is strong, Materials with High Strength.Due to the mechanical property of its excellence, cause its purposes very extensive.But be an exothermal reaction process during hydration reaction of magnesium cement, a large amount of heats can be produced in hydration process, these heats can make the temperature of cement slurry at short notice higher than 100 DEG C, and such high temperature can affect the structural volume stability of magnesium hydrolysis product of cement.
Summary of the invention
For overcoming the deficiencies in the prior art, the object of the present invention is to provide a kind of preparation method of low temperature magnesia oxychloride cement, comprising the steps:
Be that 3 ~ 9:1:11 ~ 20 are mixed to form slurry by magnesium oxide, magnesium chloride and water according to amount of substance ratio;
In described slurry, add admixture, form mud, described low temperature magnesia oxychloride cement is obtained for more than 3 days to described mud maintenance; Described admixture quality is 0.5 ~ 2 times of described magnesium oxide quality; Wherein, described admixture is selected from: sodium tetraborate, three (methylol) aminomethane, one or more in tartrate, boric acid, amine borate, primary ammonium phosphate, lime acetate, urea, zinc chloride, chitosan, phenylformic acid, aluminum chloride, water glass.
Further, described magnesium oxide, magnesium chloride and water are 3 ~ 7:1:11 ~ 15 according to amount of substance ratio.
The present invention also provides this low temperature magnesia oxychloride cement, comprises amount of substance than the magnesium oxide being 3 ~ 9:1:11 ~ 20, magnesium chloride and water; And admixture, described admixture quality is 0.5 ~ 2 times of described magnesium oxide quality; Wherein, described admixture is selected from: sodium tetraborate, three (methylol) aminomethane, one or more in tartrate, boric acid, amine borate, primary ammonium phosphate, lime acetate, urea, zinc chloride, chitosan, phenylformic acid, aluminum chloride, water glass.
Beneficial effect:
The present invention by adding admixture in existing magnesia oxychloride cement, greatly can reduce the exothermic temperature of cement hydration process, also the time that top temperature occurs is extended, heat can slowly be discharged equably, thus it is too high to avoid mud temperature, causes cement products craze and transfiguration, affect the problem of intensity.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
The preparation method of a kind of low temperature magnesia oxychloride cement provided by the invention, comprises the steps:
Step one: be that 3 ~ 9:1:11 ~ 20 are mixed to form slurry according to amount of substance ratio by magnesium oxide, magnesium chloride and water.The ratio of the amount of substance of wherein said magnesium oxide, magnesium chloride and water can referred to as " cement mol ratio ".Described magnesium oxide, magnesium chloride and water according to amount of substance ratio also can preferably better be 3 ~ 7:1:11 ~ 15.
Wherein, magnesium oxide is a kind of activated magnesia, and it can have multiple source, such as light burnt powder, causticity powder, salt lake byproduct etc., and the content of activated magnesia will be tested after obtaining in advance in various source.
Step 2: add admixture in described slurry, forms mud.Described admixture quality is 0.5 ~ 2 times of described magnesium oxide quality; Wherein, described admixture is selected from: sodium tetraborate, three (methylol) aminomethane, one or more in tartrate, boric acid, amine borate, primary ammonium phosphate, lime acetate, urea, zinc chloride, chitosan, phenylformic acid, aluminum chloride, water glass.
Step 3: maintenance 3 days under 20 DEG C of waters bath with thermostatic control, period continues the temperature detecting described mud and the time reached required for top temperature.Wherein, the present invention's maintenance in water bath with thermostatic control is to keep identical care environments with comparative example, to carry out performance comparison, in other embodiments, described mud also can complete under room temperature or envrionment temperature in maintenance.
Comparative example
Be that 3 ~ 9:1:11 ~ 20 are mixed to form slurry by magnesium oxide, magnesium chloride and water according to amount of substance ratio.Then maintenance 3 days under 20 DEG C of waters bath with thermostatic control, period continues the temperature detecting described slurry and the time reached required for top temperature.
, magnesia oxychloride cement characteristic of the present invention will be shown in conjunction with each embodiment and comparative example below, as shown in table 1.
The hydration reaction parameter of table 1 embodiment 1 ~ 16 and comparative example 1 ~ 3 and cement performance
(continuous upper table)
As known from Table 1, with the addition of each embodiment after admixture, the top temperature of its hydration process all will reduce greatly than the comparative example of correspondence; With the addition of each embodiment after admixture to reach top temperature required time and all will greatly extend than the comparative example of correspondence.Illustrate thus, the present invention by adding admixture in existing magnesia oxychloride cement, greatly can reduce the exothermic temperature of cement hydration process, also the time that top temperature occurs is extended, heat can slowly be discharged equably, thus it is too high to avoid mud temperature, causes cement products craze and transfiguration, affect the problem of intensity.
The above is the specific embodiment of the present invention, its objective is the citing done to clearly demonstrate the present invention, is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (3)
1. a preparation method for low temperature magnesia oxychloride cement, is characterized in that, comprises the steps:
Be that 3 ~ 9:1:11 ~ 20 are mixed to form slurry by magnesium oxide, magnesium chloride and water according to amount of substance ratio;
In described slurry, add admixture, form mud, described low temperature magnesia oxychloride cement is obtained for more than 3 days to described mud maintenance; Described admixture quality is 0.5 ~ 2 times of described magnesium oxide quality; Wherein, described admixture is selected from: sodium tetraborate, three (methylol) aminomethane, one or more in tartrate, boric acid, amine borate, primary ammonium phosphate, lime acetate, urea, zinc chloride, chitosan, phenylformic acid, aluminum chloride, water glass.
2. the preparation method of low temperature magnesia oxychloride cement according to claim 1, it is characterized in that, described magnesium oxide, magnesium chloride and water are 3 ~ 7:1:11 ~ 15 according to amount of substance ratio.
3. a low temperature magnesia oxychloride cement, is characterized in that, comprises amount of substance than the magnesium oxide being 3 ~ 9:1:11 ~ 20, magnesium chloride and water; And admixture, described admixture quality is 0.5 ~ 2 times of described magnesium oxide quality; Wherein, described admixture is selected from: sodium tetraborate, three (methylol) aminomethane, one or more in tartrate, boric acid, amine borate, primary ammonium phosphate, lime acetate, urea, zinc chloride, chitosan, phenylformic acid, aluminum chloride, water glass.
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| CN201510859860.5A CN105367036B (en) | 2015-11-30 | 2015-11-30 | A kind of low temperature magnesia oxychloride cement and preparation method thereof |
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| CN201510859860.5A CN105367036B (en) | 2015-11-30 | 2015-11-30 | A kind of low temperature magnesia oxychloride cement and preparation method thereof |
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| CN105367036B CN105367036B (en) | 2017-09-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108129044A (en) * | 2018-02-06 | 2018-06-08 | 河北科技大学 | A kind of method for improving magnesia oxychloride cement water resistance |
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| JP2002173356A (en) * | 2000-12-04 | 2002-06-21 | Yoshikazu Fuji | Magnesium-calcium composition and its production process |
| JP2007302486A (en) * | 2006-05-09 | 2007-11-22 | Aoyama Eco System:Kk | Heat insulating material |
| JP2007314377A (en) * | 2006-05-26 | 2007-12-06 | Aoyama Eco System:Kk | Wall material |
| DE102010024974A1 (en) * | 2009-06-19 | 2011-05-12 | Gts Grube Teutschenthal Sicherungs Gmbh & Co. Kg | Building material mixture, useful e.g. for the production of magnesium oxide-cement, comprises powdered magnesium oxide, a salty, magnesium ion compound-containing aqueous mixing solution, and an aggregate |
| CN104478254A (en) * | 2014-12-17 | 2015-04-01 | 中国科学院青海盐湖研究所 | Method for reducing heat release during hydration of magnesium oxychloride cement |
| CN104529204A (en) * | 2014-12-17 | 2015-04-22 | 中国科学院青海盐湖研究所 | Method for reducing hydration heat release of magnesium oxychloride cement |
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2015
- 2015-11-30 CN CN201510859860.5A patent/CN105367036B/en active Active
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| JP2002173356A (en) * | 2000-12-04 | 2002-06-21 | Yoshikazu Fuji | Magnesium-calcium composition and its production process |
| JP2007302486A (en) * | 2006-05-09 | 2007-11-22 | Aoyama Eco System:Kk | Heat insulating material |
| JP2007314377A (en) * | 2006-05-26 | 2007-12-06 | Aoyama Eco System:Kk | Wall material |
| DE102010024974A1 (en) * | 2009-06-19 | 2011-05-12 | Gts Grube Teutschenthal Sicherungs Gmbh & Co. Kg | Building material mixture, useful e.g. for the production of magnesium oxide-cement, comprises powdered magnesium oxide, a salty, magnesium ion compound-containing aqueous mixing solution, and an aggregate |
| CN104478254A (en) * | 2014-12-17 | 2015-04-01 | 中国科学院青海盐湖研究所 | Method for reducing heat release during hydration of magnesium oxychloride cement |
| CN104529204A (en) * | 2014-12-17 | 2015-04-22 | 中国科学院青海盐湖研究所 | Method for reducing hydration heat release of magnesium oxychloride cement |
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Cited By (1)
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| CN108129044A (en) * | 2018-02-06 | 2018-06-08 | 河北科技大学 | A kind of method for improving magnesia oxychloride cement water resistance |
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| CN105367036B (en) | 2017-09-22 |
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