CN108793795A - A kind of glass fibre magnesium phosphate cement and preparation method thereof - Google Patents
A kind of glass fibre magnesium phosphate cement and preparation method thereof Download PDFInfo
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- CN108793795A CN108793795A CN201810810780.4A CN201810810780A CN108793795A CN 108793795 A CN108793795 A CN 108793795A CN 201810810780 A CN201810810780 A CN 201810810780A CN 108793795 A CN108793795 A CN 108793795A
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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
Abstract
A kind of glass fibre magnesium phosphate cement and preparation method thereof, belongs to cementitious material Rapid-Repair field；Cement component distributes in parts by weight：300~500 parts of dead burned magnesia, 1000 parts of fine aggregate, 100 parts of acid material, 1.2~1.6 parts of toughening material, 16~20 parts of water, magnesium phosphorus ratio are (3~5)：1；Preparation method：1) by magnesite calcining, grinding, dead burned magnesia is obtained；2) raw material is mixed and stirred for uniformly；3) sample is subjected to natural curing, obtains a kind of glass fibre magnesium phosphate cement；The present invention improves the composition design of magnesium phosphate cement, and by addition treated glass fibre, while ensureing high intensity, toughening modifying is carried out to magnesium phosphate cement, prevents the secondary cracking of the crack being repaired generation, and easy to operate, cost is relatively low.
Description
Technical field
The invention belongs to cementitious material Rapid-Repair field, more particularly to a kind of glass fibre magnesium phosphate cement and its preparation
Method.
Background technology
The concrete material construction material most as dosage in the world today, use environment is increasingly serious, concrete
The endurance issues of structure receive more concerns.With the growth of concrete material age, structure it is extraneous it is various because
Different degrees of destruction can occur under the action of element, to influence the globality and stability of structure, lead to there are a large amount of military services
Concrete structure repaired, especially under the influence of environmental factor, concrete structure easily occur such as crack, stripping
The problems such as erosion, hole, is possible to aggravate, to structural damage, can not only influence the steady of structure in this way if cannot timely handle
It is qualitative, and the security performance of structure entirety is affected, in order to alleviate influence of the environment to concrete structure, improve social economy
Benefit needs to seek the material that a kind of rate of set is fast, early strength is high, can be in a short time to damaged concrete structure
It is repaired, the stability of fast quick-recovery structure.Currently, common patching material is mostly magnesium phosphate cement, but its own
Have the shortcomings that brittleness is big, intensity is insufficient.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of glass fibre magnesium phosphate cement, solves tradition point
Magnesium phosphate cement brittleness is big, the low problem of adhesion strength.
A kind of glass fibre magnesium phosphate cement, component are distributed in parts by weight：300~500 parts of dead burned magnesia is thin to collect
1000 parts of material, 100 parts of acid material, 1.2~1.6 parts of toughening material, 16~20 parts of water, magnesium phosphorus ratio are (3~5)：1.
The dead burned magnesia is by magnesite (MgCO3) grinding forms after calcining, quality purity is more than 90%, 200 mesh sieve
It is remaining to be less than 10%, specific surface area 238m2/kg；
The fine aggregate is quartz sand, and modulus is 2.2~2.8；
The acid material is potassium dihydrogen phosphate (KH2PO4), rank is technical pure, and quality purity is more than 96%, and granularity is
245~350 μm；
The toughening material is the glass fibre being surface-treated through inorganic agent, wherein inorganic agent mixes for silane coupling agent
Liquid, chemical composition are ethyl alcohol by volume：Deionized water：Acetic acid：Silane coupling agent KH570=230：25：4：1200, weight
Number is 100~400 parts.
A kind of preparation method of glass fibre magnesium phosphate cement, is as follows：
(1) magnesite is calcined under the conditions of temperature is 1400 DEG C or 1800 DEG C, it is ground, obtain dead burned magnesia；
(2) press glass fibre magnesium phosphate cement composition proportion, respectively weigh dead burned magnesia, potassium dihydrogen phosphate, quartz sand,
Water is put into agitated kettle respectively in sequence, stirs 45~60s, and glass fibre is next added thereto and first mixes slowly,
High-speed stirred again obtains magnesium phosphate cement cementitious material；
(3) the magnesium phosphate cement cementitious material stirred evenly is poured into rapidly in three gang moulds tool, vibrates uniformly, stands 1
Test specimen is placed and carries out natural curing 1d, 3d, 7d indoors, obtains a kind of glass fibre magnesium phosphate cement by form removal after~3h.
The preparation method of above-mentioned glass fibre magnesium phosphate cement, wherein：
In the step 1, the quality purity of dead burned magnesia is more than 90%, and 200 mesh screen residues are less than 10%, and specific surface area is
238m2/kg；
In the step 2, fiberglass surfacing processing procedure：It is soaked in 30~40min in silane coupling agent mixed liquor, is put
It is placed in baking oven and is dried with 40~50 DEG C.
In the step 2,45~60s is mixed slowly with 140 ± 5r/min, with 285 ± 10r/min high-speed stirreds 2~
3min。
In the step 3, the size of mold is 40mm × 40mm × 160mm.
In the step 3, local indoor air temperature is 20~25 DEG C, humidity 70%.
A kind of glass fibre magnesium phosphate cement of the present invention, compression strength are 52.1~79.5MPa, flexural strength 5.7
~17.1MPa.
Above-mentioned glass fibre magnesium phosphate cement and preparation method thereof, compared with prior art, has the beneficial effect that：
The present invention improves the composition design of magnesium phosphate cement, by addition treated glass fibre, is ensureing high intensity
While, toughening modifying is carried out to magnesium phosphate cement, prevents the crack being repaired from secondary cracking, and easy to operate, cost occurs
It is relatively low.
Description of the drawings
The scanning electron microscope (SEM) photograph of dimension magnesium phosphate cement prepared by the untreated glass fibre of Fig. 1 comparative examples of the present invention；
The scanning electron microscope (SEM) photograph of glass fibre magnesium phosphate cement prepared by Fig. 2 embodiment of the present invention 1.
Specific implementation mode
In following Examples 1 to 5, the fine aggregate is quartz sand, and modulus is 2.2~2.8；The acid material is phosphoric acid
Potassium dihydrogen (KH2PO4), rank is technical pure, and quality purity is more than 96%, and granularity is 245~350 μm；The toughening material is warp
The glass fibre of inorganic agent surface treatment, wherein inorganic agent is silane coupling agent mixed liquor, and chemical composition is second by volume
Alcohol：Deionized water：Acetic acid：Silane coupling agent KH570=230：25：4：1200, parts by weight are 100~400 parts.
It is (0.16~0.2) according to water-cement ratio by glass fibre magnesium phosphate cement made from following Examples 1 to 5：1, glue
Sand ratio is 1：1 mixes with sodium tetraborate and water, and portland cement is made and carries out extension test, by figure of eight test specimen after molding
It is placed symmetrically on the fixture of cupping machine, to prevent oblique pull effect and torque, should ensure that test specimen is placed on as possible
It is stretched on axial direction.It is destroyed with loading speed loading appropriate to test specimen, and records load value when test specimen destroys
And the position of test specimen fracture.The width and thickness that vernier caliper measurement figure of eight test specimen fracture position should be used, in terms of mm,
The adhesion strength that mortar stretches is calculated by f=F/bh formulas, and analyzes magnesium phosphate cement and old earth concrete bonding situation.
Magnesium phosphate cement cementitious material made from following Examples 1 to 5 is put into rapidly, the position of reinforcement is needed to carry out
Test, is first handled damaged position with sander, then utilizes hand-held impact pick to the old mixed of required repairing range
Xtah Crude Clay structure residual materials are purged and chipping, later to repairing interface carry out dabbing and using steel brush to dabbing position at
Loose particle and silt is scrubbed, and to ensure the cleaning of bonding interface, is then repaired the magnesium phosphate cement being stirred
Material is poured on the damaged concrete structure cleared up in advance, and tamping conserves 2 hours after paving.Magnesium phosphate cement mortar item is adopted
Compression strength and flexural strength test performance, specific test method reference are carried out with 30 omnipotent servo testing machines《GB/T17671-
19995 Test method for strength of hydraulic cement mortar》It executes.
Comparative example
A kind of glass fibre magnesium phosphate cement, component are distributed in parts by weight：400 parts of dead burned magnesia, fine aggregate
1000 parts, 100 parts of acid material, 1.6 parts of toughening material, 20 parts of water, magnesium phosphorus ratio is 4：1.
The dead burned magnesia is by magnesite (MgCO3) grinding forms after calcining, quality purity is more than 90%, 200 mesh sieve
It is remaining to be less than 10%, specific surface area 238m2/kg；
The fine aggregate is quartz sand, modulus 2.2；
The acid material is potassium dihydrogen phosphate (KH2PO4), rank is technical pure, and quality purity is more than 96%, and granularity is
245~350 μm；
The toughening material is the glass fibre of unprocessed dose of surface treatment.
The preparation method of glass fibre magnesium phosphate cement, is as follows：
(1) magnesite is calcined under the conditions of temperature is 1400 DEG C, it is ground, obtain dead burned magnesia；
(2) press glass fibre magnesium phosphate cement composition proportion, respectively weigh dead burned magnesia, potassium dihydrogen phosphate, quartz sand,
Water is put into agitated kettle respectively in sequence, stirs 45s, glass fibre is next added thereto, first with 140 ± 5r/
Min's mixes slowly 45s, then with the high-speed stirred 2min of 285 ± 10r/min, obtains magnesium phosphate cement cementitious material；
(3) the three gang moulds tool that the magnesium phosphate cement cementitious material stirred evenly pours into rapidly 40mm × 40mm × 160mm is worked as
In, it vibrates uniformly, stands form removal after 1h, test specimen is placed and carries out natural curing 1d, 3d, 7d, local indoor air temperature indoors
It it is 20 DEG C, humidity 70% obtains a kind of glass fibre magnesium phosphate cement.
The pressure-proof and snap-resistent intensity such as table 1 of glass fibre magnesium phosphate cement is made in the present embodiment, and microscopic appearance is as shown in Figure 1.
Table 1
Glass fibre magnesium phosphate cement scanning electron microscope image made from comparative example is as shown in Figure 1.
Embodiment 1
A kind of glass fibre magnesium phosphate cement, component are distributed in parts by weight：300 parts of dead burned magnesia, fine aggregate
1000 parts, 100 parts of acid material, 1.2 parts of toughening material, 16 parts of water, magnesium phosphorus ratio is 3：1.
The preparation method of glass fibre magnesium phosphate cement, is as follows：
(1) magnesite is calcined under the conditions of temperature is 1400 DEG C, it is ground, obtain dead burned magnesia；
(2) press glass fibre magnesium phosphate cement composition proportion, respectively weigh dead burned magnesia, potassium dihydrogen phosphate, quartz sand,
Water is put into agitated kettle respectively in sequence, is stirred 45s, is next added thereto through silane coupling agent mixed liquor surface
The glass fibre of processing first with the 45s that mixes slowly of 140 ± 5r/min, then with the high-speed stirred 2min of 285 ± 10r/min, obtains
To magnesium phosphate cement cementitious material；
(3) the three gang moulds tool that the magnesium phosphate cement cementitious material stirred evenly pours into rapidly 40mm × 40mm × 160mm is worked as
In, it vibrates uniformly, stands form removal after 1h, test specimen is placed and carries out natural curing 1d, 3d, 7d, local indoor air temperature indoors
It it is 20 DEG C, humidity 70% obtains a kind of glass fibre magnesium phosphate cement.
The bonding pulling capacity of glass fibre magnesium phosphate cement made from the present embodiment be 735.4N, not to total pore volume,
Pore-size distribution, porosity and its water resistance generate large effect, and it is pre- to be poured into " 8 " font mould side as patching material
Another side test adhesion strength of portland cement is first housed, wherein portland cement is 0.16 according to water-cement ratio：1, cement mortar rate
It is 1：1 is mixed and made into sodium tetraborate, magnesium phosphate cement and water, and 7d adhesive tensile resistance intensity is 2.2MPa.Glass fibre magnesium phosphate
The pressure-proof and snap-resistent intensity of cement such as table 2.
Glass fibre magnesium phosphate cement scanning electron microscope (SEM) photograph made from the present embodiment is as shown in Fig. 2, with untreated glass
The magnesium phosphate cement of fiber is compared, it is evident that the glass fibre of surface-modified processing is there are apparent convex-concave surface, it is recessed
What kind of effect convex surface can bring.
Table 2
Embodiment 2
A kind of glass fibre magnesium phosphate cement, component are distributed in parts by weight：400 parts of dead burned magnesia, fine aggregate
1000 parts, 100 parts of acid material, 1.2 parts of toughening material, 18 parts of water, magnesium phosphorus ratio is 4：1.
The dead burned magnesia is by magnesite (MgCO3) grinding forms after calcining, quality purity is more than 90%, 200 mesh sieve
It is remaining to be less than 10%, specific surface area 238m2/kg；
The preparation method of glass fibre magnesium phosphate cement, is as follows：
(1) magnesite is calcined under the conditions of temperature is 1800 DEG C, it is ground, obtain dead burned magnesia；
(2) press glass fibre magnesium phosphate cement composition proportion, respectively weigh dead burned magnesia, potassium dihydrogen phosphate, quartz sand,
Water is put into agitated kettle respectively in sequence, is stirred 60s, is next added thereto through silane coupling agent mixed liquor surface
The glass fibre of processing first with the 45s that mixes slowly of 140 ± 5r/min, then with the high-speed stirred 2min of 285 ± 10r/min, obtains
To magnesium phosphate cement cementitious material；
(2) the three gang moulds tool that the magnesium phosphate cement cementitious material stirred evenly pours into rapidly 40mm × 40mm × 160mm is worked as
In, it vibrates uniformly, stands form removal after 1h, test specimen is placed and carries out natural curing 1d, 3d, 7d, local indoor air temperature indoors
It it is 25 DEG C, humidity 70% obtains a kind of glass fibre magnesium phosphate cement.
The bonding pulling capacity of glass fibre magnesium phosphate cement made from the present embodiment be 756.6N, not to total pore volume,
Pore-size distribution, porosity and its water resistance generate large effect, and it is pre- to be poured into " 8 " font mould side as patching material
Another side test adhesion strength of portland cement is first housed, wherein portland cement is 0.16 according to water-cement ratio：1, cement mortar rate
It is 1：1 is mixed and made into sodium tetraborate, magnesium phosphate cement and water, and 7d adhesive tensile resistance intensity is 2.6MPa.Glass fibre magnesium phosphate
The compression strength of cement, flexural strength are as shown in table 3.
Table 3
Embodiment 3
A kind of glass fibre magnesium phosphate cement, component are distributed in parts by weight：300 parts of dead burned magnesia, fine aggregate
1000 parts, 100 parts of acid material, 1.2 parts of toughening material, 16 parts of water, magnesium phosphorus ratio is 3：1.
The preparation method of glass fibre magnesium phosphate cement, is as follows：
(1) magnesite is calcined under the conditions of temperature is 1400 DEG C, it is ground, obtain dead burned magnesia；
(2) press glass fibre magnesium phosphate cement composition proportion, respectively weigh dead burned magnesia, potassium dihydrogen phosphate, quartz sand,
Water is put into agitated kettle respectively in sequence, is stirred 50s, is next added thereto through silane coupling agent mixed liquor surface
The glass fibre of processing, first with the 55s that mixes slowly of 140 ± 5r/min, then with the high-speed stirred 2.5min of 285 ± 10r/min,
Obtain magnesium phosphate cement cementitious material；
(2) the three gang moulds tool that the magnesium phosphate cement cementitious material stirred evenly pours into rapidly 40mm × 40mm × 160mm is worked as
In, it vibrates uniformly, stands form removal after 1h, test specimen is placed and carries out natural curing 1d, 3d, 7d, local indoor air temperature indoors
It it is 25 DEG C, humidity 70% obtains a kind of glass fibre magnesium phosphate cement.
The bonding pulling capacity of glass fibre magnesium phosphate cement made from the present embodiment be 745.6N, not to total pore volume,
Pore-size distribution, porosity and its water resistance generate large effect, and it is pre- to be poured into " 8 " font mould side as patching material
Another side test adhesion strength of portland cement is first housed, wherein portland cement is 0.2 according to water-cement ratio：1, cement mortar rate
It is 1：1 is mixed and made into sodium tetraborate, magnesium phosphate cement and water, and 7d adhesive tensile resistance intensity is 2.1MPa.Glass fibre magnesium phosphate
The compression strength of cement, flexural strength are as shown in table 4.
Table 4
Embodiment 4
A kind of glass fibre magnesium phosphate cement, component are distributed in parts by weight：400 parts of dead burned magnesia, fine aggregate
1000 parts, 100 parts of acid material, 1.2 parts of toughening material, 20 parts of water, magnesium phosphorus ratio is 4：1.
The preparation method of glass fibre magnesium phosphate cement, is as follows：
(1) magnesite is calcined under the conditions of temperature is 1800 DEG C, it is ground, obtain dead burned magnesia；
(2) press glass fibre magnesium phosphate cement composition proportion, respectively weigh dead burned magnesia, potassium dihydrogen phosphate, quartz sand,
Water is put into agitated kettle respectively in sequence, is stirred 60s, is next added thereto through silane coupling agent mixed liquor surface
The glass fibre of processing first with the 50s that mixes slowly of 140 ± 5r/min, then with the high-speed stirred 3min of 285 ± 10r/min, obtains
To magnesium phosphate cement cementitious material；
(2) the three gang moulds tool that the magnesium phosphate cement cementitious material stirred evenly pours into rapidly 40mm × 40mm × 160mm is worked as
In, it vibrates uniformly, stands form removal after 1h, test specimen is placed and carries out natural curing 1d, 3d, 7d, local indoor air temperature indoors
It it is 25 DEG C, humidity 70% obtains a kind of glass fibre magnesium phosphate cement.
The bonding pulling capacity of glass fibre magnesium phosphate cement made from the present embodiment be 748.9N, not to total pore volume,
Pore-size distribution, porosity and its water resistance generate large effect, and it is pre- to be poured into " 8 " font mould side as patching material
Another side test adhesion strength of portland cement is first housed, wherein portland cement is 0.2 according to water-cement ratio：1, cement mortar rate
It is 1：1 is mixed and made into sodium tetraborate, magnesium phosphate cement and water, and 7d adhesive tensile resistance intensity is 2.5MPa.Glass fibre magnesium phosphate
The compression strength of cement, flexural strength are as shown in table 5.
Table 5
Embodiment 5
A kind of glass fibre magnesium phosphate cement, component are distributed in parts by weight：500 parts of dead burned magnesia, fine aggregate
1000 parts, 100 parts of acid material, 1.6 parts of toughening material, 18 parts of water, magnesium phosphorus ratio is 5：1.
The preparation method of glass fibre magnesium phosphate cement, is as follows：
(1) magnesite is calcined under the conditions of temperature is 1400 DEG C, it is ground, obtain dead burned magnesia；
(2) press glass fibre magnesium phosphate cement composition proportion, respectively weigh dead burned magnesia, potassium dihydrogen phosphate, quartz sand,
Water is put into agitated kettle respectively in sequence, is stirred 50s, is next added thereto through silane coupling agent mixed liquor surface
The glass fibre of processing, first with the 55s that mixes slowly of 140 ± 5r/min, then with the high-speed stirred 2.5min of 285 ± 10r/min,
Obtain magnesium phosphate cement cementitious material；
(2) the three gang moulds tool that the magnesium phosphate cement cementitious material stirred evenly pours into rapidly 40mm × 40mm × 160mm is worked as
In, it vibrates uniformly, stands form removal after 1h, test specimen is placed and carries out natural curing 1d, 3d, 7d, local indoor air temperature indoors
It it is 25 DEG C, humidity 70% obtains a kind of glass fibre magnesium phosphate cement.
The compression strength of glass fibre magnesium phosphate cement, flexural strength made from the present embodiment are as shown in table 6.
Table 6
Claims (8)
1. a kind of glass fibre magnesium phosphate cement, which is characterized in that the magnesium phosphate cement component is distributed in parts by weight：Reheating
300~500 parts of magnesia, 1000 parts of fine aggregate, 100 parts of acid material, 1.2~1.6 parts of toughening material, 16~20 parts of water, magnesium
Phosphorus ratio is (3~5)：1；
The dead burned magnesia is by magnesite (MgCO3) grinding forms after calcining, quality purity is more than 90%, and 200 mesh screen residues are less than
10%, specific surface area 238m2/kg；
The fine aggregate is quartz sand, and modulus is 2.2~2.8；
The acid material is potassium dihydrogen phosphate (KH2PO4), rank is technical pure, and quality purity is more than 96%, granularity is 245~
350μm；
The toughening material is the glass fibre being surface-treated through inorganic agent, wherein inorganic agent is silane coupling agent mixed liquor,
Chemical composition is ethyl alcohol by volume：Deionized water：Acetic acid：Silane coupling agent KH570=230：25：4：1200, parts by weight
It is 100~400 parts.
2. a kind of glass fibre magnesium phosphate cement according to claim 1, which is characterized in that the magnesium phosphate cement resists
Compressive Strength is 52.1~79.5MPa, and flexural strength is 5.7~17.1MPa.
3. a kind of preparation method of glass fibre magnesium phosphate cement described in claim 1, which is characterized in that specific steps are such as
Under：
(1) magnesite is calcined under the conditions of temperature is 1400 DEG C or 1800 DEG C, it is ground, obtain dead burned magnesia；
(2) glass fibre magnesium phosphate cement composition proportion is pressed, weighs dead burned magnesia, potassium dihydrogen phosphate, quartz sand, water respectively,
It puts into agitated kettle respectively in sequence, stirs 45~60s, glass fibre is next added thereto and first mixes slowly, then
High-speed stirred obtains magnesium phosphate cement cementitious material；
(3) the magnesium phosphate cement cementitious material stirred evenly is poured into rapidly in three gang moulds tool, vibrates uniformly, stands 1~3h
Test specimen is placed and carries out natural curing 1d, 3d, 7d indoors, obtains a kind of glass fibre magnesium phosphate cement by form removal afterwards.
4. a kind of preparation method of glass fibre magnesium phosphate cement according to claim 3, which is characterized in that the step
In 1, the quality purity of dead burned magnesia is more than 90%, and 200 mesh screen residues are less than 10%, specific surface area 238m2/kg。
5. a kind of preparation method of glass fibre magnesium phosphate cement according to claim 3, which is characterized in that the step
In 2, fiberglass surfacing processing procedure：It is soaked in 30~40min in silane coupling agent mixed liquor, be positioned in baking oven with 40~
50 DEG C are dried.
6. a kind of preparation method of glass fibre magnesium phosphate cement according to claim 3, which is characterized in that the step
In 2,45~60s is mixed slowly with 140 ± 5r/min, with 285 ± 10r/min high-speed stirreds, 2~3min.
7. a kind of preparation method of glass fibre magnesium phosphate cement according to claim 3, which is characterized in that the step
In 3, the size of mold is 40mm × 40mm × 160mm.
8. a kind of preparation method of glass fibre magnesium phosphate cement according to claim 3, which is characterized in that the step
In 3, local indoor air temperature is 20~25 DEG C, humidity 70%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115716742A (en) * | 2022-11-23 | 2023-02-28 | 大连理工大学 | Glass fiber reinforced hydrated magnesium silicate cement composite material and preparation method thereof |
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