CN110510896A - A kind of magnesia Thiophosphate cement and its preparation method and application - Google Patents
A kind of magnesia Thiophosphate cement and its preparation method and application Download PDFInfo
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- CN110510896A CN110510896A CN201910964028.XA CN201910964028A CN110510896A CN 110510896 A CN110510896 A CN 110510896A CN 201910964028 A CN201910964028 A CN 201910964028A CN 110510896 A CN110510896 A CN 110510896A
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- parts
- magnesia
- cement
- thiophosphate
- magnesium sulfate
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
- C04B12/02—Phosphate cements
- C04B12/027—Phosphate cements mixtures thereof with other inorganic cementitious materials
Abstract
The present invention provides a kind of magnesia Thiophosphate cement and its preparation method and application, the cement includes that the raw material of following parts by weight is made: 100 parts of light calcined magnesia, 3~6 parts of dead burned magnesia, 46~52 parts of magnesium sulfate, 2~4 parts of potassium dihydrogen phosphate, 20~30 parts of zeolite powder, 0.2~0.4 part and 70~95 parts of water of citric acid；It can be used to prepare plate using the magnesia Thiophosphate cement.Potassium dihydrogen phosphate in the magnesia Thiophosphate cement raw material of the present invention, the temperature of mix is improved with magnesia exothermic heat of reaction, the hydrolysis of magnesium sulfate is set to be strengthened, hydration reaction degree thus is improved, the citric acid of addition is conducive to the dissolution of MgO, to further enhance hydration reaction degree, through repeated detection, compression strength behind of the invention magnesia Thiophosphate cement 28 days is 73~85MPa, and flexural strength is 11.3~13.6MPa, is greatly higher than magnesium oxysulfide concrete.
Description
Technical field
The present invention relates to cement technology fields, and in particular to a kind of magnesia Thiophosphate cement and preparation method thereof and answers
With.
Background technique
Existing magnesium cement has magnesia oxychloride cement, magnesium phosphate cement and magnesium oxysulfide concrete.Magnesia oxychloride cement is anti-due to aquation
Contain a large amount of chloride ion in answering, there are damp suction surface halide accumulation, the drawbacks of corroding metal is extremely limited in use；Magnesium phosphate
Cement reaction speed is too fast, seldom uses in production magnesium cement product；Magnesium oxysulfide concrete is active MgO and certain density
MgSO4A kind of MgO-MgSO of solution composition4-H2O ternary gelling system, existing magnesium oxysulfide concrete hydration reaction degree is low, and
And there is a large amount of still unreacted Mg (OH)2, lead to poor mechanical property, be unable to satisfy the requirement of product, therefore, need
A kind of high performance cement products not only can solve damp suction surface halide accumulation but also can solve that reaction speed is too fast and poor mechanical property problem
Cement products.
Summary of the invention
The technical problems to be solved by the present invention are: providing a kind of magnesia Thiophosphate cement and preparation method thereof and answering
With solving the problems, such as that existing magnesium oxysulfide concrete leads to poor mechanical property since hydration reaction degree is low.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows: a kind of magnesia Thiophosphate cement, including
The raw material of following parts by weight is made:
100 parts of light calcined magnesia, 3~6 parts of dead burned magnesia, 46~52 parts of magnesium sulfate, 2~4 parts of potassium dihydrogen phosphate, zeolite
20~30 parts of powder, 0.2~0.4 part and 70~95 parts of water of citric acid.
Further, the zeolite powder is crushed by clinoptilolite powder or modenite powder.
Further, the granularity of the zeolite powder is 300~325 mesh.
Further, the raw material including following parts by weight is made:
100 parts of light calcined magnesia, 6 parts of dead burned magnesia, 46 parts of magnesium sulfate, 4 parts of potassium dihydrogen phosphate, 30 parts of zeolite powder, lemon
0.3 part and 70 parts of water of lemon acid.
Further, the raw material including following parts by weight is made:
100 parts of light calcined magnesia, 6 parts of dead burned magnesia, 52 parts of magnesium sulfate, 4 parts of potassium dihydrogen phosphate, 20 parts of zeolite powder, lemon
0.4 part and 95 parts of water of lemon acid.
Further, the raw material including following parts by weight is made:
100 parts of light calcined magnesia, 3 parts of dead burned magnesia, 47 parts of magnesium sulfate, 2 parts of potassium dihydrogen phosphate, 30 parts of zeolite powder, lemon
0.3 part and 80 parts of water of lemon acid.
The present invention also provides a kind of preparation methods of magnesia Thiophosphate cement, include the following steps:
46~52 parts of magnesium sulfate, 0.2~0.4 part of citric acid and 70~95 parts of water are hybridly prepared into solution, then will be light-burned
100 parts of magnesia, 3~6 parts and 20~30 parts of zeolite powder of dead burned magnesia are added in the solution and stir evenly, finally gradually
2~4 parts of potassium dihydrogen phosphate is added to obtain the final product.
The present invention also provides a kind of application of magnesia Thiophosphate cement, the magnesia Thiophosphate cement is used for and fine sand
And the cementing production concrete of stone, or fiber reinforced cement product is combined with reinforcing fiber.
A kind of magnesia Thiophosphate cement provided by the invention, beneficial effect are:
1, the potassium dihydrogen phosphate in the magnesia Thiophosphate cement raw material of the present invention and magnesia exothermic heat of reaction improve mix
Temperature, so that the hydrolysis of magnesium sulfate is strengthened, thus improve the magnesia Thiophosphate cement that ionic forms are reacted
Hydration reaction degree, and since the citric acid of addition is conducive to the dissolution of MgO, to further enhance magnesia Thiophosphate cement
Hydration reaction degree, thus generate hardening of cement system intensity it is higher, through repeated detection, magnesia sulfate-phosphate of the invention
Compression strength after hardening of cement 28 days is 73MPa~85MPa, and flexural strength is 11.3MPa~13.6MPa, is greatly higher than
The compression strength and flexural strength of magnesium oxysulfide concrete.
2, the zeolite powder in the raw material of magnesia Thiophosphate cement of the invention contains active SiO in zeolite powder2And activity
Al2O3, active SiO2It will be with Mg (OH)2It reacts, generates hydrated magnesium silicate, make the Mg (OH) in hardening of cement system2Content
It is very low, and be wrapped in hardening system, and then promote the resisting erosion of sulfate and anti-carbonation properties of magnesium cement material.
3, magnesia Thiophosphate cement of the invention does not use magnesium chloride, and chloride ion is not present, has eradicated magnesia oxychloride cement
The drawbacks of damp suction surface halide accumulation, corrosion metal.But still keep magnesium strength of cement height, low and with plant fiber direct combination the property of basicity
Energy.And avoid that magnesium phosphate cement reaction speed is too fast, uppity deficiency.
4, magnesia Thiophosphate cement of the invention can with the various concrete of the cementing production of fine sand, stone and its product,
Can be effectively compound with various reinforcing fibers, especially with plant fiber direct combination, it is fabricated to the fiber reinforcement water of different purposes
Mud product.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, it is explained below in conjunction with embodiment.
The present invention provides a kind of magnesia Thiophosphate cement, and the raw material including following parts by weight is made:
100 parts of light calcined magnesia, 3~6 parts of dead burned magnesia, 46~52 parts of magnesium sulfate, 2~4 parts of potassium dihydrogen phosphate, zeolite
20~30 parts of powder, 0.2~0.4 part and 70~95 parts of water of citric acid.
Magnesia Thiophosphate cement of the invention be based on magnesium oxysulfide concrete, magnesium oxysulfide concrete be by magnesia and
The inorganic coagulation material that Adlerika mixing generates, the chemical equation being related to are as follows:
5MgO+MgSO4+12H2O=5Mg (OH)2·MgSO4·7H2O；
The chemical equation is analyzed it is found that MgSO4It will be in 12H2It is dissolved in O, percent concentration 35.89%, this
The magnesium sulfate percent concentration of sample high concentration be at normal temperature it is difficult to realize, magnesium sulfate percent concentration can only be fitted under room temperature
18%~20%, that is to say, that there are a large amount of free state water, these free state waters will generate Mg (OH) with MgO naturally2, work as Mg
(OH)2When being gel state shape, hardening of cement body moisture evaporation, magnesium sulfate concentration is improved, and hydration reaction can still provide for, if Mg
(OH)2When being converted into crystalline state, hydration reaction cannot be carried out.So the magnesium oxysulfide concrete prepared under room temperature, hydration reaction journey
It spends low, and there are a large amount of still unreacted Mg (OH)2。
From the principle analysis of acid-base adducts object is generated, this is carried out under ionic condition for the hydration reaction of magnesium oxysulfide concrete,
Thus have:
6Mg2++10OH-1+SO4 2-+7H2O=5Mg (OH)2·MgSO4·7H2O；
According to dissolution-precipitation reaction principle, dissolution is carried out in two steps:
The first step is hydration reaction: MgO+H2O=Mg (OH)2；
Second step is ionization reaction:
Merge into a step are as follows:
Mg(OH)2Solubility in water is very low, but in MgSO4In but with MgSO4The raising of solution concentration and increase.
Magnesium sulfate hydrolysis:
The H that magnesium sulfate hydrolysis generates+The H generated with lemon acid dissolution+The OH generated with MgO dissolution-1There is following reaction:Due to the addition of citric acid, the OH for generating MgO dissolution-1It constantly reduces, is conducive to MgO to dissolution
Positive direction carries out.
The hydration reaction process for the magnesium phosphate cement that magnesia and potassium dihydrogen phosphate generate is exothermic process, makes mix material temperature
Degree increases, and the solubility and temperature of magnesium sulfate are to be positively correlated, and are increased with temperature, and the solubility of magnesium sulfate increases, magnesium sulfate it is dense
Degree increases, and the total amount of hydrolysis increases, the H of generation+It is more, so solubility of the magnesia in Adlerika is with magnesium sulfate
The raising of the concentration of solution and improve.In addition, magnesium sulfate water heat of desorption, temperature is higher, and the heat provided is more, and hydrolysis is more
It is more.
After magnesium sulfate hydrolysis, the amount of MgO dissolution also just increases, and the probability of ion collision is also increased by, and precipitates the sulphur of generation
Oxygen magnesium cement specified number amount also just increases, and therefore, the hydration reaction degree of magnesia Thiophosphate cement of the invention is than simple sulphur
The hydration reaction degree of magnesia wants high.
Magnesia Thiophosphate cement of the invention can also as other cement, increase plasticizer, early strength agent, water-reducing agent,
The additives such as retarder, accelerator, can also be with fine sand, the various concrete of the cementing production of stone and its product.
As can be seen from the above description, the beneficial effects of the present invention are:
1, the potassium dihydrogen phosphate in the magnesia Thiophosphate cement raw material of the present invention and magnesia exothermic heat of reaction improve mix
Temperature, so that the hydrolysis of magnesium sulfate is strengthened, thus improve the magnesia Thiophosphate cement that ionic forms are reacted
Hydration reaction degree, and since the citric acid of addition is conducive to the dissolution of MgO, to further enhance magnesia Thiophosphate cement
Hydration reaction degree, thus generate hardening of cement system intensity it is higher, through repeated detection, magnesia sulfate-phosphate of the invention
Compression strength after cement 28 days is 73MPa~85MPa, and flexural strength is 11.3MPa~13.6MPa, is greatly higher than sulphur oxygen
The compression strength and flexural strength of magnesium cement.
2, the zeolite powder in the raw material of magnesia Thiophosphate cement of the invention contains active SiO in zeolite powder2And activity
Al2O3, active SiO2It will be with Mg (OH)2It reacts, generates hydrated magnesium silicate, make the Mg (OH) in hardening of cement system2Content
It is very low, and be wrapped in hardening system, and then promote the resisting erosion of sulfate and anti-carbonation properties of magnesium cement material.
3, magnesia Thiophosphate cement of the invention does not use magnesium chloride, and chloride ion is not present, has eradicated magnesia oxychloride cement
The drawbacks of damp suction surface halide accumulation, corrosion metal.But still keep magnesium strength of cement height, low and with plant fiber direct combination the property of basicity
Energy.And avoid that magnesium phosphate cement reaction speed is too fast, uppity deficiency.
4, magnesia Thiophosphate cement of the invention can with the various concrete of the cementing production of fine sand, stone and its product,
Can be effectively compound with various reinforcing fibers, especially with plant fiber direct combination, it is fabricated to the fiber reinforcement water of different purposes
Mud product.
Embodiment 1 repairs industrial plant ground
According to parts by weight, by 100 parts of light calcined magnesia, 6 parts of dead burned magnesia, 46 parts of magnesium sulfate, 30 parts of zeolite powder, lemon
Lemon acid 0.3 part, additive aluminic acid receive 0.4 part and 70 parts of water stir evenly, be gradually added into 4 parts of potassium dihydrogen phosphate, be made into magnesia
150 parts of 2.7 sand of fineness modulus, 50 parts of steel fibre is added in Thiophosphate cement net slurry, if ground breakage hole is big, is added
200 parts of Dw20~40mm cobble, stir into steel fiber reinforced concrete, so that it may which, for repairing industrial plant ground, 3 days up to CF100
High strength steel fibre concrete grade.
Embodiment 2 makes building enclosure thermal insulation material
According to parts by weight, by 100 parts of light calcined magnesia, 5 parts of dead burned magnesia, 50 parts of magnesium sulfate, 20 parts of zeolite powder, water
90 parts stir evenly, and are gradually added into 3 parts of potassium dihydrogen phosphate and are made into magnesia Thiophosphate cement net slurry, are added 500 parts of leca,
Lightweight aggregate concrete is stirred into for making building enclosure thermal insulation material, up to 5.0 strength grade of LC after solidification.
Embodiment 3 makes glass fibre and magnesium cement board
According to parts by weight, by 100 parts of light calcined magnesia, 6 parts of dead burned magnesia, 52 parts of magnesium sulfate, 20 parts of zeolite powder, lemon
0.4 part, 95 parts of water of lemon acid stirs evenly, and is gradually added into 4 parts of potassium dihydrogen phosphate and is made into magnesia Thiophosphate cement net slurry, wood is added
40 parts of bits, stir into slurry, produce glass fibre and magnesium cement board with upper and lower each layer of glass grid cloth roll-forming, properties refer to
Mark can reach to be required as defined in GB25970 " fireproof inorganic composite plate ".
Embodiment 4 makes light partition board
According to parts by weight, by 100 parts of light calcined magnesia, 3 parts of dead burned magnesia, 47 parts of magnesium sulfate, potassium dihydrogen phosphate 2
Part, 30 parts of zeolite powder, 0.3 part of citric acid, 80 parts of water are made into magnesia Thiophosphate cement net slurry, and the plant fiber 50 that is chopped is added
Part, 10 parts of polypropylene fiber, stir into slurry, produce light partition board by battery-mould method, performance indexes can reach
It is required to as defined in GB/T23451 " light partition board for building ".
In conclusion a kind of magnesia Thiophosphate cement provided by the invention and the method for preparing plate using the cement,
Beneficial effect is:
1, the potassium dihydrogen phosphate in the magnesia Thiophosphate cement raw material of the present invention and magnesia exothermic heat of reaction improve mix
Temperature, so that the hydrolysis of magnesium sulfate is strengthened, thus improve the magnesia Thiophosphate cement that ionic forms are reacted
Hydration reaction degree, and since the citric acid of addition is conducive to the dissolution of MgO, to further enhance magnesia Thiophosphate cement
Hydration reaction degree, thus generate hardening of cement system intensity it is higher, through repeated detection, magnesia sulfate-phosphate of the invention
28 days compression strength of cement is 73MPa~85MPa, and flexural strength is 11.3MPa~13.6MPa, is greatly higher than magnesium oxysulfide
The compression strength and flexural strength of cement.
2, the zeolite powder in the raw material of magnesia Thiophosphate cement of the invention contains active SiO in zeolite powder2And activity
Al2O3, active SiO2It will be with Mg (OH)2It reacts, generates hydrated magnesium silicate, make the Mg (OH) in hardening of cement system2Content
It is very low, and be wrapped in hardening system, and then promote the resisting erosion of sulfate and anti-carbonation properties of magnesium cement material.
3, magnesia Thiophosphate cement of the invention does not use magnesium chloride, and chloride ion is not present, has eradicated magnesia oxychloride cement
The drawbacks of damp suction surface halide accumulation, corrosion metal.But still keep magnesium strength of cement height, low and with plant fiber direct combination the property of basicity
Energy.And avoid that magnesium phosphate cement reaction speed is too fast, uppity deficiency.
4, magnesia Thiophosphate cement of the invention can with the various concrete of the cementing production of fine sand, stone and its product,
Can be effectively compound with various reinforcing fibers, especially with plant fiber direct combination, it is fabricated to the fiber reinforcement water of different purposes
Mud product.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright description are applied directly or indirectly in relevant technical field, are similarly included in this hair
In bright scope of patent protection.
Claims (8)
1. a kind of magnesia Thiophosphate cement, which is characterized in that the raw material including following parts by weight is made:
100 parts of light calcined magnesia, 3~6 parts of dead burned magnesia, 46~52 parts of magnesium sulfate, 2~4 parts of potassium dihydrogen phosphate, zeolite powder 20
~30 parts, 0.2~0.4 part and 70~95 parts of water of citric acid.
2. magnesia Thiophosphate cement according to claim 1, which is characterized in that the zeolite powder by clinoptilolite powder or
Modenite powder crushes.
3. magnesia Thiophosphate cement according to claim 1 or 2, which is characterized in that the granularity of the zeolite powder is
300~325 mesh.
4. magnesia Thiophosphate cement according to claim 1, which is characterized in that the raw material system including following parts by weight
At:
100 parts of light calcined magnesia, 6 parts of dead burned magnesia, 46 parts of magnesium sulfate, 4 parts of potassium dihydrogen phosphate, 30 parts of zeolite powder, citric acid
0.3 part and 70 parts of water.
5. magnesia Thiophosphate cement according to claim 1, which is characterized in that the raw material system including following parts by weight
At:
100 parts of light calcined magnesia, 6 parts of dead burned magnesia, 52 parts of magnesium sulfate, 4 parts of potassium dihydrogen phosphate, 20 parts of zeolite powder, citric acid
0.4 part and 95 parts of water.
6. magnesia Thiophosphate cement according to claim 1, which is characterized in that the raw material system including following parts by weight
At:
100 parts of light calcined magnesia, 3 parts of dead burned magnesia, 47 parts of magnesium sulfate, 2 parts of potassium dihydrogen phosphate, 30 parts of zeolite powder, citric acid
0.3 part and 80 parts of water.
7. a kind of preparation method of magnesia Thiophosphate cement, which comprises the steps of:
46~52 parts of magnesium sulfate, 0.2~0.4 part of citric acid and 70~95 parts of water are hybridly prepared into solution, then by light-burned oxidation
100 parts of magnesium, 3~6 parts and 20~30 parts of zeolite powder of dead burned magnesia are added in the solution and stir evenly, and are finally gradually added into
2~4 parts of potassium dihydrogen phosphate to obtain the final product.
8. a kind of application of magnesia Thiophosphate cement according to claim 7, which is characterized in that the magnesia sulphur phosphoric acid
Salt cement is used for and fine sand and the cementing production concrete of stone, or is combined fiber reinforced cement product with reinforcing fiber.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111848110A (en) * | 2020-04-14 | 2020-10-30 | 哈尔滨理工大学 | High-strength anti-bending inorganic artificial stone |
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