CN105347712A - Potassium magnesium phosphate cement - Google Patents
Potassium magnesium phosphate cement Download PDFInfo
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- CN105347712A CN105347712A CN201510857312.9A CN201510857312A CN105347712A CN 105347712 A CN105347712 A CN 105347712A CN 201510857312 A CN201510857312 A CN 201510857312A CN 105347712 A CN105347712 A CN 105347712A
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- Prior art keywords
- glass fibre
- potassium
- magnesium phosphate
- cement
- tio
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Abstract
The invention discloses potassium magnesium phosphate cement and belongs to the field of cement. The potassium magnesium phosphate cement is prepared from 34-40% of KH2PO4, 43-49% of MgO, 7.2-8.8% of Al(H2PO4)3, 3.3-4.9% of glass fibers, 1-1.8% of ethylenediamine tetramethylenephosphonic acid potassium salt, 0.4-1.2% of a phosphomonoester coupling agent, 0.4-0.8% of sodium triphosphate and 0.9-1.3% of EDTMPS. The potassium magnesium phosphate cement has the advantages that the heat expansion coefficient is low, and formed cracks are reduced after curing.
Description
Technical field
The present invention relates to a kind of cement, particularly a kind of potassium magnesium phosphate cement.
Background technology
Potassium magnesium phosphate cement is by dead roasting magnesium oxide and soluble phosphate, chemical additive and mineral admixture according to a certain percentage, is changed that to generate with phosphoric acid salt be the inorganic coagulation material cohering phase in acid condition by soda acid chemical reaction and physical action.Such material, at normal temperatures by chemical bonds, has possessed the principal feature of silicates gelling material and stupalith, namely low-temperature curing, high early strong, high volume stability, cohesiveness are strong, hardenite partial neutral and good weather resistance etc.
But the thermal expansivity of prior art potassium magnesium phosphate cement is higher, hydration heat amount is large simultaneously, easily can form crack after theing cement solidifies.
Summary of the invention
Goal of the invention of the present invention is: for above-mentioned Problems existing, provides a kind of low thermal coefficient of expansion, reduces a kind of potassium magnesium phosphate cement of cracking initiation after solidification.
The technical solution used in the present invention is as follows:
A kind of potassium magnesium phosphate cement of the present invention, comprises 34% ~ 40%KH
2pO
4, 43% ~ 49%MgO, 7.2% ~ 8.8%Al(H
2pO
4)
3, 3.3% ~ 4.9% glass fibre, 1% ~ 1.8% ethylenediamine tetramethylene phosphonic acid potassium, 0.4% ~ 1.2% phosphate monoester coupling agent, 0.4% ~ 0.8% tripoly phosphate sodium STPP and 0.9% ~ 1.3% ethylene diamine tetra methylene phosphonic acid sodium.
Owing to have employed technique scheme, in potassium magnesium phosphate cement, add the intensity that aluminium dihydrogen phosphate can increase cement, increase water tolerance, reduce the thermal expansivity of cement, reduce the shrinkage of cement; Glass fibre can increase the toughness of cement, reduces the generation in gap; The hydrophobic side of phosphate monoester coupling agent can produce bonding action with matrix, improves interfacial combined function, the toughness reduction aspect of cement is served to the effect of buffering; Add tripoly phosphate sodium STPP, diamines tetramethylene phosphonic acid potassium and ethylene diamine tetra methylene phosphonic acid sodium can reduce hydrated cementitious system initial temperature and control the pH value of potassium magnesium phosphate hydrated cementitious system liquid phase, the time of coagulation of potassium magnesium phosphate cement slurry is obviously extended, total hydration heat amount reduces, thus ensure that crystal aquation product production is intact, crack and defect few, hardenite pore structure also improves.
A kind of potassium magnesium phosphate cement of the present invention, comprises 37%KH
2pO
4, 46%MgO, 9%Al(H
2pO
4)
3, 4.1% glass fibre, 1.4% ethylenediamine tetramethylene phosphonic acid potassium, 0.8% phosphate monoester coupling agent, 0.6% tripoly phosphate sodium STPP and 1.1% ethylene diamine tetra methylene phosphonic acid sodium.
Owing to have employed technique scheme, in potassium magnesium phosphate cement water, Components of Acid-Base ratio answers the ultimate compression strength of slide and early water stability to have remarkably influenced on cement, aforementioned proportion is best Components of Acid-Base ratio, effectively can delay the early hydration speed of response of cement slurry, hydrated product crystal accumulation is tight, defect is few, and hardening of cement body has more perfect pore structure.
A kind of potassium magnesium phosphate cement of the present invention, the particle diameter of described magnesium oxide particle is 86 μm, and the specific surface area of described magnesium oxide particle is 1737cm
2/ g.
Owing to have employed technique scheme, the operable time of construction and good degree of mobilization can be ensured, meanwhile, the less shrinkage improving cement of particle diameter, thus make cement produce microdilatancy, reduce thermal expansivity.But particle diameter is too small, can improve hydration temperature, therefore, this size is optimum value.
A kind of potassium magnesium phosphate cement of the present invention, the particle diameter of described biphosphate k particle is 130 μm, and the specific surface area of described potassium primary phosphate is 2110cm
2/ g.
Owing to have employed technique scheme, the operable time of construction and good degree of mobilization can be ensured, meanwhile, the less shrinkage improving cement of particle diameter, thus make cement produce microdilatancy, reduce thermal expansivity.But particle diameter is too small, can improve hydration temperature, therefore, this size is optimum value.
A kind of potassium magnesium phosphate cement of the present invention, the particle diameter of described biphosphate aluminum particulate is 90 μm, and the specific surface area of described aluminium dihydrogen phosphate is 2320cm
2/ g.
Owing to have employed technique scheme, the operable time of construction and good degree of mobilization can be ensured, meanwhile, the less shrinkage improving cement of particle diameter, thus make cement produce microdilatancy, reduce thermal expansivity.But particle diameter is too small, can improve hydration temperature, therefore, this size is optimum value.
A kind of potassium magnesium phosphate cement of the present invention, described glass fibre is nano-TiO
2/ micron composite glass fiber, described Nano/micron TiO
2glass fibre is laminate structure, comprises TiO
2at the porous coating that fiberglass surfacing is formed, described TiO
2the particle diameter of particle is 43nm.
Owing to have employed technique scheme, nano titanium oxide and glass fibre are carried out compound, improves the interface interaction between two-phase, significantly can increase the wear resistance of glass fibre.
A kind of potassium magnesium phosphate cement of the present invention, described nano-TiO
2/ micron composite glass fiber is prepared from by following steps:
Step one: get 1 part of butyl (tetra) titanate and be dissolved in appropriate dehydrated alcohol, according to dehydrated alcohol: methyl ethyl diketone volume ratio 1:0.2 adds methyl ethyl diketone in solution, stirs 15min according to the speed of 2000r/min;
Step 2: add appropriate amount of deionized water until precipitate completely in solution, then the nitric acid adding that in solution appropriate concentration is 30%, until sediment completely dissolve, obtain Sol A liquid;
Step 3: according to butyl (tetra) titanate: glass fibre mol ratio 1.2:1 takes glass fibre, glass fibre is dissolved in appropriate dehydrated alcohol and is made into glass fibre solution, glass fibre solution is added dropwise in Sol A liquid according to the speed of 20/, heating reflux reaction while dropping;
Step 4: drip completely at glass fibre solution, after continuing heating reflux reaction 2h, leaves standstill and naturally cools to normal temperature, obtain Powdered precipitation;
Step 5: filter, use appropriate dehydrated alcohol successively, deionized water and absolute ethanol washing powder, dry under the condition of 70 DEG C, obtain nano-TiO
2/ micron composite glass fiber.
Owing to have employed technique scheme, the conjugated fibre of synthesis, titanium dioxide and glass fibre not easily depart from.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, obviously extend the time of coagulation of slurry, total hydration heat amount reduces, thus ensures that crystal aquation product production is intact, crack and defect few, hardenite pore structure also improves.
2, effectively delay the early hydration speed of response of cement slurry, hydrated product crystal accumulation is tight, defect is few, and hardening of cement body has more perfect pore structure.
3, improve the shrinkage of cement, thus make cement produce microdilatancy, reduce thermal expansivity, improve the interface interaction between two-phase, significantly can increase wear resistance.
Accompanying drawing explanation
Fig. 1 is that simple glass fiber SEM schemes;
Fig. 2 is nano-TiO
2/ micron composite glass fiber SEM schemes.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make the object of invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
A kind of potassium magnesium phosphate cement, comprises 34%KH
2pO
4, 49%MgO, 7.2%Al(H
2pO
4)
3, 4.9% glass fibre, 1% ethylenediamine tetramethylene phosphonic acid potassium, 1.2% phosphate monoester coupling agent, 0.4% tripoly phosphate sodium STPP and 1.3% ethylene diamine tetra methylene phosphonic acid sodium.
Embodiment 2
A kind of potassium magnesium phosphate cement, comprises 40%KH
2pO
4, 43%MgO, 8.8%Al(H
2pO
4)
3, 3.3% glass fibre, 1.8% ethylenediamine tetramethylene phosphonic acid potassium, 0.4% phosphate monoester coupling agent, 0.8% tripoly phosphate sodium STPP and 0.9% ethylene diamine tetra methylene phosphonic acid sodium.
The particle diameter of magnesium oxide particle is 86 μm, and the specific surface area of described magnesium oxide particle is 1737cm
2/ g.
The particle diameter of biphosphate k particle is 130 μm, and the specific surface area of described potassium primary phosphate is 2110cm
2/ g.
The particle diameter of biphosphate aluminum particulate is 90 μm, and the specific surface area of described aluminium dihydrogen phosphate is 2320cm
2/ g.
Embodiment 3
A kind of potassium magnesium phosphate cement, comprises 37%KH
2pO
4, 46%MgO, 9%Al(H
2pO
4)
3, 4.1% glass fibre, 1.4% ethylenediamine tetramethylene phosphonic acid potassium, 0.8% phosphate monoester coupling agent, 0.6% tripoly phosphate sodium STPP and 1.1% ethylene diamine tetra methylene phosphonic acid sodium.
The particle diameter of magnesium oxide particle is 86 μm, and the specific surface area of described magnesium oxide particle is 1737cm
2/ g.
The particle diameter of biphosphate k particle is 130 μm, and the specific surface area of described potassium primary phosphate is 2110cm
2/ g.
The particle diameter of biphosphate aluminum particulate is 90 μm, and the specific surface area of described aluminium dihydrogen phosphate is 2320cm
2/ g.
Glass fibre is nano-TiO
2/ micron composite glass fiber, Nano/micron TiO
2glass fibre is laminate structure, comprises TiO
2at the porous coating that fiberglass surfacing is formed, TiO
2the particle diameter of particle is 43nm.
Embodiment 4
Nano-TiO
2/ micron composite glass fiber is prepared from by following steps:
Step one: get 1 part of butyl (tetra) titanate and be dissolved in appropriate dehydrated alcohol, according to dehydrated alcohol: methyl ethyl diketone volume ratio 1:0.2 adds methyl ethyl diketone in solution, stirs 15min according to the speed of 2000r/min;
Step 2: add appropriate amount of deionized water until precipitate completely in solution, then the nitric acid adding that in solution appropriate concentration is 30%, until sediment completely dissolve, obtain Sol A liquid;
Step 3: according to butyl (tetra) titanate: glass fibre mol ratio 1.2:1 takes glass fibre, glass fibre is dissolved in appropriate dehydrated alcohol and is made into glass fibre solution, glass fibre solution is added dropwise in Sol A liquid according to the speed of 20/, heating reflux reaction while dropping;
Step 4: drip completely at glass fibre solution, after continuing heating reflux reaction 2h, leaves standstill and naturally cools to normal temperature, obtain Powdered precipitation;
Step 5: filter, use appropriate dehydrated alcohol successively, deionized water and absolute ethanol washing powder, dry under the condition of 70 DEG C, obtain nano-TiO
2/ micron composite glass fiber.
As shown in Figure 1 to Figure 2, bare glass fibre is bar-shaped, and diameter 10 ~ 20 μm, surface is more smooth.Nano-TiO
2the uniform TiO2 coating layer of/micron composite glass fiber surface coverage, defines Nano/micron composite particles, TiO
2the particle diameter of particle is at 43nm, and coating layer is vesicular structure.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a potassium magnesium phosphate cement, is characterized in that: comprise 34% ~ 40%KH
2pO
4, 43% ~ 49%MgO, 7.2% ~ 8.8%Al(H
2pO
4)
3, 3.3% ~ 4.9% glass fibre, 1% ~ 1.8% ethylenediamine tetramethylene phosphonic acid potassium, 0.4% ~ 1.2% phosphate monoester coupling agent, 0.4% ~ 0.8% tripoly phosphate sodium STPP and 0.9% ~ 1.3% ethylene diamine tetra methylene phosphonic acid sodium.
2. a kind of potassium magnesium phosphate cement as claimed in claim 1, is characterized in that: comprise 37%KH
2pO
4, 46%MgO, 9%Al(H
2pO
4)
3, 4.1% glass fibre, 1.4% ethylenediamine tetramethylene phosphonic acid potassium, 0.8% phosphate monoester coupling agent, 0.6% tripoly phosphate sodium STPP and 1.1% ethylene diamine tetra methylene phosphonic acid sodium.
3. a kind of potassium magnesium phosphate cement as claimed in claim 1 or 2, is characterized in that: the particle diameter of described magnesium oxide particle is 86 μm, and the specific surface area of described magnesium oxide particle is 1737cm
2/ g.
4. a kind of potassium magnesium phosphate cement as claimed in claim 3, is characterized in that: the particle diameter of described biphosphate k particle is 130 μm, and the specific surface area of described potassium primary phosphate is 2110cm
2/ g.
5. a kind of potassium magnesium phosphate cement as claimed in claim 4, is characterized in that: the particle diameter of described biphosphate aluminum particulate is 90 μm, and the specific surface area of described aluminium dihydrogen phosphate is 2320cm
2/ g.
6. a kind of potassium magnesium phosphate cement as described in claim 4 or 5, is characterized in that: described glass fibre is nano-TiO
2/ micron composite glass fiber, described Nano/micron TiO
2glass fibre is laminate structure, comprises TiO
2at the porous coating that fiberglass surfacing is formed, described TiO
2the particle diameter of particle is 43nm.
7. a kind of potassium magnesium phosphate cement as claimed in claim 6, is characterized in that, described nano-TiO
2/ micron composite glass fiber is prepared from by following steps:
Step one: get 1 part of butyl (tetra) titanate and be dissolved in appropriate dehydrated alcohol, according to dehydrated alcohol: methyl ethyl diketone volume ratio 1:0.2 adds methyl ethyl diketone in solution, stirs 15min according to the speed of 2000r/min;
Step 2: add appropriate amount of deionized water until precipitate completely in solution, then the nitric acid adding that in solution appropriate concentration is 30%, until sediment completely dissolve, obtain Sol A liquid;
Step 3: according to butyl (tetra) titanate: glass fibre mol ratio 1.2:1 takes glass fibre, glass fibre is dissolved in appropriate dehydrated alcohol and is made into glass fibre solution, glass fibre solution is added dropwise in Sol A liquid according to the speed of 20/, heating reflux reaction while dropping;
Step 4: drip completely at glass fibre solution, after continuing heating reflux reaction 2h, leaves standstill and naturally cools to normal temperature, obtain Powdered precipitation;
Step 5: filter, use appropriate dehydrated alcohol successively, deionized water and absolute ethanol washing powder, dry under the condition of 70 DEG C, obtain nano-TiO
2/ micron composite glass fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510857312.9A CN105347712A (en) | 2015-11-30 | 2015-11-30 | Potassium magnesium phosphate cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510857312.9A CN105347712A (en) | 2015-11-30 | 2015-11-30 | Potassium magnesium phosphate cement |
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| Publication Number | Publication Date |
|---|---|
| CN105347712A true CN105347712A (en) | 2016-02-24 |
Family
ID=55323807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510857312.9A Pending CN105347712A (en) | 2015-11-30 | 2015-11-30 | Potassium magnesium phosphate cement |
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|---|---|
| CN (1) | CN105347712A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109049295A (en) * | 2018-08-17 | 2018-12-21 | 扬州大学 | A kind of potassium magnesium phosphate cement base ecology retaining wall block and preparation method thereof |
| CN109796147A (en) * | 2019-03-05 | 2019-05-24 | 东南大学 | A kind of fast repairing material and preparation method thereof for magnesium phosphate cement |
Citations (6)
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|---|---|---|---|---|
| CN102234200A (en) * | 2010-04-25 | 2011-11-09 | 杨建明 | Method for controlling setting time and early hydration speed of magnesium potassium phosphate cement |
| CN103204646A (en) * | 2012-01-17 | 2013-07-17 | 中国铁道科学研究院铁道建筑研究所 | Special stabilizing agent for cement-emulsified asphalt mortar |
| CN104230305A (en) * | 2014-09-18 | 2014-12-24 | 福州大学 | Fireproof potassium magnesium phosphate cement tunnel paint for cement tunnel and use method thereof |
| CN104310831A (en) * | 2014-10-14 | 2015-01-28 | 福州大学 | Water-resisting potassium phosphate magnesium cement and preparation method thereof |
| CN104844147A (en) * | 2015-05-29 | 2015-08-19 | 湖州华仑助剂科技有限公司 | Preparation method of magnesium phosphate cement |
| CN104909729A (en) * | 2015-05-18 | 2015-09-16 | 山东工业陶瓷研究设计院有限公司 | Preparation method of lightweight rigid heat insulation material |
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2015
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Patent Citations (6)
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|---|---|---|---|---|
| CN102234200A (en) * | 2010-04-25 | 2011-11-09 | 杨建明 | Method for controlling setting time and early hydration speed of magnesium potassium phosphate cement |
| CN103204646A (en) * | 2012-01-17 | 2013-07-17 | 中国铁道科学研究院铁道建筑研究所 | Special stabilizing agent for cement-emulsified asphalt mortar |
| CN104230305A (en) * | 2014-09-18 | 2014-12-24 | 福州大学 | Fireproof potassium magnesium phosphate cement tunnel paint for cement tunnel and use method thereof |
| CN104310831A (en) * | 2014-10-14 | 2015-01-28 | 福州大学 | Water-resisting potassium phosphate magnesium cement and preparation method thereof |
| CN104909729A (en) * | 2015-05-18 | 2015-09-16 | 山东工业陶瓷研究设计院有限公司 | Preparation method of lightweight rigid heat insulation material |
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Non-Patent Citations (1)
| Title |
|---|
| 张亚梅等: "《土木工程材料》", 31 December 1995 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109049295A (en) * | 2018-08-17 | 2018-12-21 | 扬州大学 | A kind of potassium magnesium phosphate cement base ecology retaining wall block and preparation method thereof |
| CN109796147A (en) * | 2019-03-05 | 2019-05-24 | 东南大学 | A kind of fast repairing material and preparation method thereof for magnesium phosphate cement |
| CN109796147B (en) * | 2019-03-05 | 2021-09-28 | 东南大学 | Rapid repairing material for magnesium phosphate cement and preparation method thereof |
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Application publication date: 20160224 |
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