CN104761167A - Magnesium phosphate cement and preparation method thereof - Google Patents
Magnesium phosphate cement and preparation method thereof Download PDFInfo
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- CN104761167A CN104761167A CN201510125360.9A CN201510125360A CN104761167A CN 104761167 A CN104761167 A CN 104761167A CN 201510125360 A CN201510125360 A CN 201510125360A CN 104761167 A CN104761167 A CN 104761167A
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- magnesium phosphate
- phosphate cement
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Abstract
Disclosed are magnesium phosphate cement and a preparation method thereof, which relate to the field of a building material. The magnesium phosphate cement comprises the following components, by mass: (1) 65.0-80.0% of magnesium phosphate cement clinker, (2) 5.0-10.0% of magnesium slag, (3) 2.0-5.0% nano-alumina, (4) 2.0-5.0% of silicon nitride, (5) 5.0-10.0% of fly ash, (6) 2.0-5.0% of a delayed coagulant, and (7) 2.5-5.0% of gypsum. The preparation method of the magnesium phosphate cement comprises: (1) material preparation, (2) pulverizing, (3) pre-mixing, and (4) powder grinding. The magnesium phosphate cement provided in the invention has an adjustable coagulation speed and a characteristic of relatively high plasticity, and is high in early coagulation strength and long-term strength, so that the defect that the long-term strength of the magnesium phosphate cement is reduced is overcome, and the use prospect of the magnesium phosphate cement can be effectively improved.
Description
Technical field
The invention belongs to building material field, particularly the preparation method of a kind of magnesium phosphate cement and this cement.
Background technology
Magnesium phosphate cement, it is the fast hydraulic cementing materials of a kind of quick setting and rapid hardening, early strength high and low temperature rate of set, the cohesive strength of itself and old concrete is higher, add magnesium phosphate cement wear resisting property and anti-freezing property better, this cement is mainly applicable to the field that motorway, airfield runway, municipal arterial highway etc. need Rapid-Repair.
Snap cure is the advantage of magnesium phosphate cement, be particularly suitable for salvaging, but it is simultaneously also too fast just because of hydration rate, not only affect the shaping of material, and intensity is also affected, therefore, the hydration time of magnesium phosphate cement and intensity need to reach a balance, the demand of rapid construction should be met, material use also will be made shaping, and intensity is higher.
Application number is the patent documentation " a kind of magnesium phosphate cement based composites " of 201410117477.8, disclose a kind of magnesium phosphate cement material, the performance of current numerous domestic scholar to magnesium phosphate cement has comparatively detailed research, and magnesium phosphate cement is unfavorable for large-scale construction requirement time of coagulation very fast, and magnesium phosphate cement water tolerance is poor.Magnesium phosphate cement based composites feature of the present invention is: in magnesium phosphate cement, add silicate cement and aluminosulfate cement, and the time of coagulation of this magnesium phosphate cement based composites is increased, and water tolerance also improves to a certain extent.It can thus be appreciated that this technical scheme is the use that combined by various cement grog, to reduce magnesium phosphate cement time of coagulation, ensures its intensity simultaneously, improve its water tolerance.But, because the character of different cement is not identical, reduce the time of coagulation of magnesium phosphate cement, also the fast hard feature strong soon of magnesium phosphate cement can be affected, its intensity can be affected, and due to the reduction of phosphoric acid salt and content of magnesia, its excellent wear resisting property also decreases, therefore, the program is not improve the ideal scheme of magnesium phosphate cement.
Application number is the patent documentation " slowly-releasing phosphoric acid cement " of 201180072272.7, and disclose a kind of magnesium phosphate cement, this mixture comprises: be coated on the MgO particle in the additive for changing described cement casting part setting time at least partly; Select in order to provide empirical formula to be MMgPO
46H
2the phosphoric acid salt of the binder product of O or phosphoric acid; And one is selected from (a) CaSiO
3, (b) MgSiO
3, (c) SiO
2, (d) flyash, (e) extra large sand, and the phase of gathering materials of any combination every more than (f).To the coated better control provided changing setting time of MgO particle, and good physical properties after theing cement solidifies.Also disclosed herein the method manufacturing this mixture and prepare cement casting part with this mixture.It can thus be appreciated that the program is carried out coated to MgO, to control its setting time, but, first be prepare comparatively complexity, secondly, after MgO is coated, its aquation mechanism is affected, so also can be affected to its intensity, therefore the program is the scheme of attending to one thing and lose sight of another, also not satisfactory.
Summary of the invention
The technical problem that the present invention solves: for above-mentioned deficiency, overcome the defect of prior art, the object of this invention is to provide a kind of magnesium phosphate cement and preparation method thereof.
Technical scheme of the present invention: a kind of magnesium phosphate cement, comprises each component of following mass percent:
(1) magnesium phosphate cement grog 65.0%-80.0%;
(2) magnesium slag 5.0%-10.0%;
(3) nano aluminium oxide 2.0%-5.0%;
(4) silicon nitride 2.0%-5.0%;
(5) flyash 5.0%-10.0%;
(6) retardant 2.0%-5.0%;
(7) gypsum 2.5%-5.0%.
As preferably, described retardant is borax.
As preferably, the mass content of described silicon nitride is 2.5%-3.5%.
As preferably, described gypsum is desulfurated plaster.
A preparation method for magnesium phosphate cement, preparation process is as follows:
(1) get the raw materials ready: the mass content according to each component accurately takes each component;
(2) pulverize: magnesium slag is carried out pulverization process, and the median size to powder is 80-150um;
(3) premix: each component is mixed, stirs;
(4) grinding: the powder material that step (3) obtains is carried out grinding, is 20-50um to median size, namely obtains magnesium phosphate cement.
As preferably, in step (4), the median size of magnesium phosphate cement is 20-30um.
Beneficial effect: the performance of magnesium phosphate cement, depend on phosphoric acid salt and magnesian aquation mechanism, deposit in case there is no retardant, the rate of set of magnesium phosphate cement is very fast, so that cause the plasticity-of material to be affected, be unfavorable for forming materials, therefore, need to control magnesium phosphate cement time of coagulation, simultaneously proof strength.For this reason, the present invention with the addition of mineral admixture and retardant.In magnesium phosphate cement hydration process, phosphoric acid salt and magnesian content ratio or affect speed and the intensity of aquation, magnesium slag provided by the invention, aforementioned proportion can be adjusted to a certain extent, coordinate the use of retardant simultaneously, effectively can control the presetting period of magnesium phosphate cement, time of coagulation is controlled within the scope of 30min-4h.Simultaneously, for avoiding strength degradation, add nano level aluminum oxide, effectively improve the intensity after its sclerosis, therefore, magnesium phosphate cement provided by the invention, it is adjustable that it has rate of set, the feature that plasticity-is stronger, early stage intensity of simultaneously condensing and longterm strength all higher, overcoming the defect that magnesium phosphate cement longterm strength reduces, is a kind of effective mode improving magnesium phosphate cement prospect of the application.
Embodiment
In order to understand the present invention further, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these describe just for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
Embodiment 1:
A kind of magnesium phosphate cement, comprises each component of following mass percent:
(1) magnesium phosphate cement grog 65.0%;
(2) magnesium slag 10.0%;
(3) nano aluminium oxide 4.0%;
(4) silicon nitride 5.0%;
(5) flyash 10.0%;
(6) retardant borax 3.0%;
(7) desulfurated plaster 3.0%.
Prepare magnesium phosphate cement according to preparation method provided by the invention, preparation process is as follows:
(1) get the raw materials ready: the mass content according to each component accurately takes each component;
(2) pulverize: magnesium slag is carried out pulverization process, and the median size to powder is 120um;
(3) premix: each component is mixed, stirs;
(4) grinding: the powder material that step (3) obtains is carried out grinding, is 50um to median size, namely obtains magnesium phosphate cement.
Embodiment 2:
A kind of magnesium phosphate cement, comprises each component of following mass percent:
(1) magnesium phosphate cement grog 80.0%;
(2) magnesium slag 5.0%;
(3) nano aluminium oxide 2.0%;
(4) silicon nitride 2.0%;
(5) flyash 5.0%;
(6) retardant borax 2.0%;
(7) desulfurated plaster 4%.
Prepare magnesium phosphate cement according to preparation method provided by the invention, preparation process is as follows:
(1) get the raw materials ready: the mass content according to each component accurately takes each component;
(2) pulverize: magnesium slag is carried out pulverization process, and the median size to powder is 120um;
(3) premix: each component is mixed, stirs;
(4) grinding: the powder material that step (3) obtains is carried out grinding, is 50um to median size, namely obtains magnesium phosphate cement.
Embodiment 3:
A kind of magnesium phosphate cement, comprises each component of following mass percent:
(1) magnesium phosphate cement grog 75.0%;
(2) magnesium slag 5.0%;
(3) nano aluminium oxide 5.0%;
(4) silicon nitride 3.0%;
(5) flyash 6.0%;
(6) retardant borax 3.0%;
(7) desulfurated plaster 3.0%.
Prepare magnesium phosphate cement according to preparation method provided by the invention, preparation process is as follows:
(1) get the raw materials ready: the mass content according to each component accurately takes each component;
(2) pulverize: magnesium slag is carried out pulverization process, and the median size to powder is 100um;
(3) premix: each component is mixed, stirs;
(4) grinding: the powder material that step (3) obtains is carried out grinding, is 30um to median size, namely obtains magnesium phosphate cement.
Embodiment 4:
A kind of magnesium phosphate cement, comprises each component of following mass percent:
(1) magnesium phosphate cement grog 70.0%;
(2) magnesium slag 7.0%;
(3) nano aluminium oxide 3.0%;
(4) silicon nitride 3.0%;
(5) flyash 8.0%;
(6) retardant borax 4.0%;
(7) desulfurated plaster 5.0%.
Prepare magnesium phosphate cement according to preparation method provided by the invention, preparation process is as follows:
(1) get the raw materials ready: the mass content according to each component accurately takes each component;
(2) pulverize: magnesium slag is carried out pulverization process, and the median size to powder is 80um;
(3) premix: each component is mixed, stirs;
(4) grinding: the powder material that step (3) obtains is carried out grinding, is 30um to median size, namely obtains magnesium phosphate cement.
Embodiment 5:
A kind of magnesium phosphate cement, comprises each component of following mass percent:
(1) magnesium phosphate cement grog 70.0%;
(2) magnesium slag 8.0%;
(3) nano aluminium oxide 4%;
(4) silicon nitride 3.0%;
(5) flyash 6.0%;
(6) retardant borax 5.0%;
(7) desulfurated plaster 4.0%.
Prepare magnesium phosphate cement according to preparation method provided by the invention, preparation process is as follows:
(1) get the raw materials ready: the mass content according to each component accurately takes each component;
(2) pulverize: magnesium slag is carried out pulverization process, and the median size to powder is 80um;
(3) premix: each component is mixed, stirs;
(4) grinding: the powder material that step (3) obtains is carried out grinding, is 20um to median size, namely obtains magnesium phosphate cement.
The magnesium phosphate cement above-mentioned embodiment provided is as experimental group; Preparing magnesium phosphate cement according to the disclosed technical scheme of patent documentation " a kind of magnesium phosphate cement based composites " that application number is 201410117477.8, is control group; Experimental group and control group are carried out performance test respectively.
(1) time of coagulation
Carry out cement setting time test to the magnesium phosphate cement of embodiment 1-5 and control group, result is as shown in table 1 below:
The time of coagulation of table 1 magnesium phosphate cement measures (unit: min)
As seen from table, on the presetting period, the embodiment 1-5 time is longer, is significantly higher than control group, and wherein the presetting period of embodiment 2 is the shortest; On final setting time, embodiment 1 is the longest, and embodiment 2 is the shortest, and the initial set of embodiment 2 and the spacing of final set the shortest; Embodiment 1 due to the content of magnesium slag and retardant the highest, therefore its initial set and final setting time are all longer, and embodiment 5 is taken second place; The hydration rate of control group is subject to the impact of component, extends accordingly, but final still shorter.
(2) compressive property
Measure the compressive property of embodiment 1-5 and control group, result is as shown in table 2:
Table 2 magnesium phosphate cement compressive property test (unit: MPa)
As seen from the above table, the intensity of embodiment 1-5 1d all reaches higher than 30MPa, and all higher than control group, wherein the intensity of embodiment 2 is the highest; In 3d intensity, embodiment 1-5 intensity enhancing is obvious, and the intensity of embodiment 1-5 reaches unanimity, and gap is little, and wherein the intensity of embodiment 2 is still the highest; In 28d intensity, the Strength Changes of each group is all not obvious, and wherein the later strength of embodiment 5 is the highest.
In sum, magnesium phosphate cement provided by the invention, in the situation that time of coagulation is controlled, early strength and longterm strength all reach good level.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a magnesium phosphate cement, is characterized in that, comprises each component of following mass percent:
(1) magnesium phosphate cement grog 65.0%-80.0%;
(2) magnesium slag 5.0%-10.0%;
(3) nano aluminium oxide 2.0%-5.0%;
(4) silicon nitride 2.0%-5.0%;
(5) flyash 5.0%-10.0%;
(6) retardant 2.0%-5.0%;
(7) gypsum 2.5%-5.0%.
2. magnesium phosphate cement according to claim 1, is characterized in that: described retardant is borax.
3. magnesium phosphate cement according to claim 1, is characterized in that: the mass content of described silicon nitride is 2.5%-3.5%.
4. magnesium phosphate cement according to claim 1, is characterized in that: described gypsum is desulfurated plaster.
5. a preparation method for magnesium phosphate cement according to claim 1, is characterized in that, preparation process is as follows:
(1) get the raw materials ready: the mass content according to each component accurately takes each component;
(2) pulverize: magnesium slag is carried out pulverization process, and the median size to powder is 80-150um;
(3) premix: each component is mixed, stirs;
(4) grinding: the powder material that step (3) obtains is carried out grinding, is 20-50um to median size, namely obtains magnesium phosphate cement.
6. the preparation method of magnesium phosphate cement according to claim 5, is characterized in that: in step (4), the median size of magnesium phosphate cement is 20-30um.
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| CN201510125360.9A CN104761167A (en) | 2015-03-23 | 2015-03-23 | Magnesium phosphate cement and preparation method thereof |
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|---|---|---|---|
| CN201510125360.9A CN104761167A (en) | 2015-03-23 | 2015-03-23 | Magnesium phosphate cement and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036607A (en) * | 2015-07-14 | 2015-11-11 | 常州市武进翔宇电子元器件有限公司 | Ceramic waste anti-ultraviolet type polyethylene sintered external wall panel and production method therefor |
| CN108585567A (en) * | 2018-07-07 | 2018-09-28 | 河源市极致知管信息科技有限公司 | A kind of high temperature resistant phosphate cement |
| CN113912310A (en) * | 2021-10-13 | 2022-01-11 | 福州大学 | High-corrosion-resistance magnesium phosphate cement concrete for sewage pipeline and preparation method thereof |
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| CN101811837A (en) * | 2009-02-23 | 2010-08-25 | 深圳大学 | Fly ash gelled material and dry-mixed mortar thereof |
| CN102390943A (en) * | 2011-07-27 | 2012-03-28 | 中国科学院青海盐湖研究所 | Magnesium phosphate cement prepared by using magnesium oxide byproduct in process of extracting lithium carbonate from salt lake |
| CN103613297A (en) * | 2013-10-24 | 2014-03-05 | 中国科学院青海盐湖研究所 | Fast-setting early strength magnesium phosphate cement without additional retarder |
| CN103922694A (en) * | 2014-03-27 | 2014-07-16 | 北京工业大学 | Magnesium phosphate cement based composite material |
| CN104193371A (en) * | 2014-08-29 | 2014-12-10 | 长兴兴鹰新型耐火建材有限公司 | Kilneye castable and preparation method thereof |
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2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811837A (en) * | 2009-02-23 | 2010-08-25 | 深圳大学 | Fly ash gelled material and dry-mixed mortar thereof |
| CN102390943A (en) * | 2011-07-27 | 2012-03-28 | 中国科学院青海盐湖研究所 | Magnesium phosphate cement prepared by using magnesium oxide byproduct in process of extracting lithium carbonate from salt lake |
| CN103613297A (en) * | 2013-10-24 | 2014-03-05 | 中国科学院青海盐湖研究所 | Fast-setting early strength magnesium phosphate cement without additional retarder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036607A (en) * | 2015-07-14 | 2015-11-11 | 常州市武进翔宇电子元器件有限公司 | Ceramic waste anti-ultraviolet type polyethylene sintered external wall panel and production method therefor |
| CN108585567A (en) * | 2018-07-07 | 2018-09-28 | 河源市极致知管信息科技有限公司 | A kind of high temperature resistant phosphate cement |
| CN113912310A (en) * | 2021-10-13 | 2022-01-11 | 福州大学 | High-corrosion-resistance magnesium phosphate cement concrete for sewage pipeline and preparation method thereof |
| CN113912310B (en) * | 2021-10-13 | 2022-09-13 | 福州大学 | High-corrosion-resistance magnesium phosphate cement concrete for sewage pipeline and preparation method thereof |
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Application publication date: 20150708 |