CN108484089B - Bi-component negative-temperature rapid repair mortar and preparation and use methods thereof - Google Patents
Bi-component negative-temperature rapid repair mortar and preparation and use methods thereof Download PDFInfo
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- CN108484089B CN108484089B CN201810318303.6A CN201810318303A CN108484089B CN 108484089 B CN108484089 B CN 108484089B CN 201810318303 A CN201810318303 A CN 201810318303A CN 108484089 B CN108484089 B CN 108484089B
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
A bi-component negative temperature rapid repair mortar and a preparation and use method thereof belong to the field of concrete structures. The bi-component negative-temperature rapid repair mortar comprises the following raw materials in parts by weight: the material A is a mixed material of magnesia, borax, dihydric phosphate and fly ash, and the mixed material comprises the following raw materials in parts by weight: 40-60 parts of magnesia; 20-40 parts of borax; 2-4 parts of dihydric phosphate; 10-15 parts of fly ash; 3-5 parts of diatomite; the material B is a mixed solution of an antifreezing agent and water, and the mixed solution comprises the following raw materials in parts by weight: 0.5-1 part of an antifreezing agent; 4-6 parts of water; the preparation method comprises ball milling raw materials, mixing, and preparing material A and material B respectively, wherein the material A and material B can be mixed for construction and hardening at above-20 deg.C. The double-component negative-temperature rapid repair mortar can obtain higher compressive and flexural strength and faster setting time, and can be prepared and used under the negative-temperature condition.
Description
Technical Field
The invention relates to the field of concrete structures, such as roads, bridges, buildings and the like, in particular to double-component negative-temperature rapid repair mortar and a preparation method and a use method thereof.
Background
The temperature is low in winter in the north, and the temperature of the used raw materials of the quick road repairing engineering is negative temperature, and the temperature of mixing water is also very low, so that the mixing process is likely to be frozen, and the mixture has no workability. Meanwhile, considering that the repair work amount is relatively small, the heat of the repair material can be quickly transferred to a road, the temperature is quickly reduced, and the construction process and the hardening process of the repair material are both at negative temperature, so that enough liquid moisture is ensured to be present in the interior of the repair material in the mixing, construction and hardening processes. The magnesium phosphate cementing Material (MPC) has the advantages of high bonding strength, quick condensation, wear resistance, micro-expansion, freezing resistance and the like, is a potential novel road repairing material with research value, energy conservation and environmental protection, and can be widely applied to quick repairing of bridges, roads and airport runways. However, under the condition of negative temperature, in order to facilitate construction, the repair material needs to be matched with an antifreezing agent so as to meet the requirements of workability of the repair material under the condition of negative temperature and continuous hardening after construction.
Disclosure of Invention
The invention provides bi-component negative-temperature rapid repair mortar and a preparation method and a use method thereof.
The technical scheme adopted by the invention is as follows:
the bi-component negative temperature rapid repair mortar comprises the following raw materials in parts by weight:
the material A is a mixed material of magnesia, borax, dihydric phosphate and fly ash, and the mixed material comprises the following raw materials in parts by weight:
40-60 parts of magnesia;
20-40 parts of borax;
2-4 parts of dihydric phosphate;
10-15 parts of fly ash;
3-5 parts of diatomite;
the material B is a mixed solution of an antifreezing agent and water, and the mixed solution comprises the following raw materials in parts by weight:
0.5-1 part of an antifreezing agent;
4-6 parts of water;
wherein, according to the mass ratio, the material A: b material (75-124): (4.5-7).
As a preferred technical scheme: the magnesite is one or a mixture of fused magnesite and dead burned magnesite, and is formed by sintering and grinding at a high temperature of more than 1500 ℃, and the content of magnesium oxide is more than or equal to 95%.
As a preferred technical scheme: the dihydric phosphate is one or a mixture of ammonium dihydrogen phosphate, potassium dihydrogen phosphate and calcium dihydrogen phosphate.
As a preferred technical scheme: the antifreezing agent is one or a mixture of ethylene glycol, methanol and ethanol.
A preparation method of bi-component negative temperature rapid repair mortar comprises the following steps:
the method comprises the following steps: preparing A material
(1) According to the proportion, putting the magnesia and the borax into a ball mill for mixing and milling until the sieve residue of a 80-micron square-hole sieve is less than or equal to 5 percent, and stopping ball milling to obtain a mixture of the magnesia and the borax;
(2) according to the proportion, putting the fly ash, the diatomite and the dihydric phosphate into a ball mill for mixing and grinding, sieving the mixture with a 80-micron square-hole sieve until the screen residue is less than or equal to 5 percent, and stopping ball milling to obtain a mixture of the fly ash, the diatomite and the dihydric phosphate;
(3) putting a mixture of magnesia and borax and a mixture of fly ash, diatomite and dihydric phosphate into a stirrer, uniformly stirring, and discharging to form a solid component A material;
step two: preparing material B
Mixing the antifreezing agent and water according to the proportion to prepare a solution to form a material B.
In the step (3), the mixture is uniformly stirred, and the preferable stirring time is 3-5 min.
A use method of bi-component negative temperature rapid repair mortar comprises the following steps: mixing the material A and the material B on site to form the double-component negative-temperature rapid repair mortar for rapidly repairing bridges, roads and airport runways.
The bi-component negative temperature rapid repair mortar is rapid repair mortar which can be constructed and hardened at the temperature of more than 20 ℃ below zero.
According to the double-component negative-temperature rapid repair mortar and the preparation and use methods thereof, the added antifreezing agent greatly improves the antifreezing effect of the double-component negative-temperature rapid repair mortar, so that the mortar has good workability in an environment with the temperature of above-20 ℃, can be rapidly hardened, and can form a shielding film on the surface of magnesia to play a role of a retarder. The added diatomite can absorb the water in the material and prevent the material A from storing, absorbing moisture and caking for a long time.
The invention relates to bi-component negative temperature rapid repair mortar and a preparation and use method thereof, wherein the bi-component negative temperature rapid repair mortar has the following beneficial effects:
(1) the setting speed is high, and the cement can be hardened within 20 min;
(2) the early strength is high, and the strength can reach 25MPa in 2 h;
(3) the fluidity is good;
(4) can be prepared and constructed under the condition of negative temperature.
Detailed Description
The invention is further illustrated by the following examples; it should be understood that these examples are only for illustrating the present invention, and are not to be construed as limiting the scope of the present invention.
In the following examples, the starting materials and equipment used are commercially available unless otherwise specified.
Example 1
The bi-component negative temperature rapid repair mortar comprises the following raw materials in parts by weight:
the material A is a mixed material of magnesia, borax, dihydric phosphate and fly ash, and the mixed material comprises the following raw materials in parts by weight:
45 parts of magnesia;
25 parts of borax;
2 parts of dihydric phosphate;
10 parts of fly ash;
5 parts of diatomite;
the material B is a mixed solution of an antifreezing agent and water, and the mixed solution comprises the following raw materials in parts by weight:
0.5 part of an antifreezing agent;
4 parts of water;
wherein, according to the mass ratio, the material A: material B is 87: 4.5.
the magnesite is fused magnesite which is formed by sintering and grinding at the high temperature of more than 1500 ℃, and the content of magnesium oxide is more than or equal to 95 percent.
The dihydric phosphate is ammonium dihydrogen phosphate.
The antifreezing agent is ethylene glycol.
A preparation method of bi-component negative temperature rapid repair mortar comprises the following steps:
the method comprises the following steps: preparing A material
(1) According to the proportion, 45 parts of magnesia and 25 parts of borax are put into a ball mill for mixed milling until the sieve residue of a 80-micron square-hole sieve is less than 5%, and the ball milling is stopped to obtain a mixture of the magnesia and the borax;
(2) according to the proportion, 10 parts of fly ash, 5 parts of diatomite and 2 parts of dihydric phosphate are put into a ball mill for mixed grinding, the residue is sieved by a 80-micron square-hole sieve to be less than 5 percent, and the ball milling is stopped to obtain a mixture of the fly ash, the diatomite and the dihydric phosphate;
(3) and putting the mixture of the magnesite and the borax after the mixing and grinding and the mixture of the fly ash, the diatomite and the dihydric phosphate into a stirrer, stirring for 3 minutes, and discharging to form a solid component A material.
Step two: preparing material B
And preparing 0.5 part of antifreezing agent and 4 parts of water into a solution according to the proportion to form a material B.
A use method of bi-component negative temperature rapid repair mortar comprises the following steps: mixing the material A and the material B at the temperature of-15 ℃, and stirring for 2 minutes to form repair mortar slurry; and quickly pouring the slurry into a mould, and curing for 2 hours at the temperature of-15 ℃ to obtain the rapid repair mortar with the breaking strength of 3.62MPa, the compressive strength of 28.4MPa and the tensile bonding strength of 1.5 MPa.
Example 2
The bi-component negative temperature rapid repair mortar comprises the following raw materials in parts by weight:
the material A is a mixed material of magnesia, borax, dihydric phosphate and fly ash, and the mixed material comprises the following raw materials in parts by weight:
50 parts of magnesia;
30 parts of borax;
3 parts of dihydric phosphate;
12.5 parts of fly ash;
4 parts of diatomite;
the material B is a mixed solution of an antifreezing agent and water, and the mixed solution comprises the following raw materials in parts by weight:
0.75 part of an antifreezing agent;
5 parts of water;
wherein, according to the mass ratio, the material A: material B is 99.5: 5.75.
the magnesite is a mixture of fused magnesite and dead burned magnesite (the mass ratio is 1:1), and is formed by high-temperature sintering and grinding at the temperature of more than 1500 ℃, and the content of magnesium oxide is more than or equal to 95%.
The dihydric phosphate is potassium dihydrogen phosphate.
The antifreezing agent is a mixture of methanol and ethanol (in a volume ratio of 1: 1).
A preparation method of bi-component negative temperature rapid repair mortar comprises the following steps:
the method comprises the following steps: preparing A material
(1) According to the proportion, 50 parts of magnesia and 30 parts of borax are put into a ball mill for mixed milling until the sieve residue of a 80-micron square-hole sieve is less than 5 percent, and the ball milling is stopped to obtain a mixture of the magnesia and the borax;
(2) according to the proportion, 12.5 parts of fly ash, 4 parts of diatomite and 3 parts of dihydric phosphate are put into a ball mill for mixed grinding, the residue is sieved by a 80-micron square-hole sieve to be less than 5 percent, and the ball milling is stopped to obtain a mixture of the fly ash, the diatomite and the dihydric phosphate;
(3) and putting the mixture of the magnesite and the borax after the mixing and grinding and the mixture of the fly ash, the diatomite and the dihydric phosphate into a stirrer, stirring for 3 minutes, and discharging to form a solid component A material.
Step two: preparing material B
And preparing 0.75 part of antifreezing agent and 5 parts of water into a solution according to the proportion to form a material B.
A use method of bi-component negative temperature rapid repair mortar comprises the following steps: mixing the material A and the material B at the temperature of-15 ℃, and stirring for 2 minutes to form repair mortar slurry; and quickly pouring the slurry into a mould, and curing for 2 hours at the temperature of-15 ℃ to obtain the rapid repair mortar with the breaking strength of 3.80MPa, the compressive strength of 31.3MPa and the tensile bonding strength of 1.6 MPa.
Example 3
The bi-component negative temperature rapid repair mortar comprises the following raw materials in parts by weight:
the material A is a mixed material of magnesia, borax, dihydric phosphate and fly ash, and the mixed material comprises the following raw materials in parts by weight:
55 parts of magnesia;
35 parts of borax;
4 parts of dihydric phosphate;
15 parts of fly ash;
3 parts of diatomite;
the material B is a mixed solution of an antifreezing agent and water, and the mixed solution comprises the following raw materials in parts by weight:
1 part of an antifreezing agent;
6 parts of water;
wherein, according to the mass ratio, the material A: 112 parts of material B: 7.
the magnesite is fused magnesite which is formed by sintering and grinding at the high temperature of more than 1500 ℃, and the content of magnesium oxide is more than or equal to 95 percent.
The dihydric phosphate is calcium dihydrogen phosphate.
The antifreezing agent is a mixture of ethylene glycol and ethanol (in a volume ratio of 1: 1).
A preparation method of bi-component negative temperature rapid repair mortar comprises the following steps:
the method comprises the following steps: preparing A material
(1) According to the proportion, 55 parts of magnesia and 35 parts of borax are put into a ball mill for mixed milling until the sieve residue of a 80-micron square-hole sieve is less than 5%, and the ball milling is stopped to obtain a mixture of the magnesia and the borax;
(2) according to the proportion, putting 15 parts of fly ash, 3 parts of diatomite and 4 parts of dihydric phosphate into a ball mill for mixed grinding, sieving the mixture with a 80-micron square-hole sieve until the residue is less than 5%, and stopping ball milling to obtain a mixture of the fly ash, the diatomite and the dihydric phosphate;
(3) and putting the mixture of the magnesite and the borax after the mixing and grinding and the mixture of the fly ash, the diatomite and the dihydric phosphate into a stirrer, stirring for 3 minutes, and discharging to form a solid component A material.
Step two: preparing material B
And preparing 1 part of antifreezing agent and 6 parts of water into a solution according to the proportion to form a material B.
A use method of bi-component negative temperature rapid repair mortar comprises the following steps: mixing the material A and the material B at the temperature of-15 ℃, and stirring for 2 minutes to form repair mortar slurry; and quickly pouring the slurry into a mould, and curing for 2 hours at the temperature of-15 ℃ to obtain the rapid repair mortar with the breaking strength of 3.45MPa, the compressive strength of 26.6MPa and the tensile bonding strength of 1.4 MPa.
Example 4
The bi-component negative temperature rapid repair mortar comprises the following raw materials in parts by weight:
the material A is a mixed material of magnesia, borax, dihydric phosphate and fly ash, and the mixed material comprises the following raw materials in parts by weight:
60 parts of magnesia;
40 parts of borax;
3 parts of dihydric phosphate;
10 parts of fly ash;
3 parts of diatomite;
the material B is a mixed solution of an antifreezing agent and water, and the mixed solution comprises the following raw materials in parts by weight:
0.6 part of an antifreezing agent;
4 parts of water;
wherein, according to the mass ratio, the material A: material B is 116: 4.6.
the magnesite is dead-burned magnesite which is formed by high-temperature sintering and grinding at the temperature of more than 1500 ℃, and the content of magnesium oxide is more than or equal to 95 percent.
The dihydric phosphate is a mixture of potassium dihydrogen phosphate and calcium dihydrogen phosphate (mass ratio is 1: 1).
The antifreezing agent is ethylene glycol.
The preparation method of the bi-component negative-temperature rapid repair mortar is the same as that in example 1, except that the bi-component negative-temperature rapid repair mortar contains the raw materials and the mass parts of the raw materials are the formula in the example.
The use method of the double-component negative-temperature rapid repair mortar is the same as that of the embodiment 1.
Example 5
The bi-component negative temperature rapid repair mortar comprises the following raw materials in parts by weight:
the material A is a mixed material of magnesia, borax, dihydric phosphate and fly ash, and the mixed material comprises the following raw materials in parts by weight:
40 parts of magnesia;
20 parts of borax;
2 parts of dihydric phosphate;
10 parts of fly ash;
3 parts of diatomite;
the material B is a mixed solution of an antifreezing agent and water, and the mixed solution comprises the following raw materials in parts by weight:
0.6 part of an antifreezing agent;
4 parts of water;
wherein, according to the mass ratio, the material A: material B is 75: 4.6.
the magnesite is dead-burned magnesite which is formed by high-temperature sintering and grinding at the temperature of more than 1500 ℃, and the content of magnesium oxide is more than or equal to 95 percent.
The dihydric phosphate is a mixture of potassium dihydrogen phosphate and calcium dihydrogen phosphate (mass ratio is 1: 1).
The antifreezing agent is a mixture of ethylene glycol and methanol (in a volume ratio of 1: 1).
The preparation method of the bi-component negative-temperature rapid repair mortar is the same as that in example 1, except that the bi-component negative-temperature rapid repair mortar contains the raw materials and the mass parts of the raw materials are the formula in the example.
The use method of the double-component negative-temperature rapid repair mortar is the same as that of the embodiment 1.
Therefore, compared with the similar products on the market, the rapid repair mortar prepared by the method disclosed by the invention can obtain higher strength and faster setting time, and can be prepared and used under the negative temperature condition.
Finally, it should be noted that the above embodiments are only used to supplement and illustrate the technical solutions of the present invention, and are not limited. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various modifications and equivalent arrangements can be made without departing from the spirit and scope of the present invention, which is to be covered by the appended claims.
Claims (6)
1. The double-component negative-temperature rapid repair mortar is characterized by comprising the following raw materials in parts by weight:
the material A is a mixed material of magnesia, borax, dihydric phosphate and fly ash, and the mass parts of the raw materials are as follows:
40-60 parts of magnesia;
20-40 parts of borax;
2-4 parts of dihydric phosphate;
10-15 parts of fly ash;
3-5 parts of diatomite;
the material B is a mixed solution of an antifreezing agent and water, and the raw materials in parts by weight are as follows:
0.5-1 part of an antifreezing agent;
4-6 parts of water;
the antifreezing agent is one or a mixture of ethylene glycol, methanol and ethanol;
wherein, according to the mass ratio, the material A: material B = (75-124): (4.5-7);
the bi-component negative temperature rapid repair mortar is rapid repair mortar which can be constructed and hardened at the temperature of more than 20 ℃ below zero.
2. The two-component negative-temperature rapid repair mortar of claim 1, wherein the magnesite is one or a mixture of fused magnesite and dead burned magnesite, and is formed by high-temperature sintering and grinding at a temperature of more than 1500 ℃, and the content of magnesium oxide is more than or equal to 95%.
3. The two-component negative-temperature rapid repair mortar of claim 1, wherein the dihydrogen phosphate is one or a mixture of ammonium dihydrogen phosphate, potassium dihydrogen phosphate and calcium dihydrogen phosphate.
4. The preparation method of the two-component negative temperature rapid repair mortar of any one of claims 1 to 3, characterized by comprising the following steps:
the method comprises the following steps: preparing A material
(1) According to the proportion, putting the magnesia and the borax into a ball mill for mixing and milling until the sieve residue of a 80-micron square-hole sieve is less than or equal to 5 percent, and stopping ball milling to obtain a mixture of the magnesia and the borax;
(2) according to the proportion, putting the fly ash, the diatomite and the dihydric phosphate into a ball mill for mixing and grinding, sieving the mixture with a 80-micron square-hole sieve until the screen residue is less than or equal to 5 percent, and stopping ball milling to obtain a mixture of the fly ash, the diatomite and the dihydric phosphate;
(3) putting a mixture of magnesia and borax and a mixture of fly ash, diatomite and dihydric phosphate into a stirrer, uniformly stirring, and discharging to form a solid component A material;
step two: preparing material B
Mixing the antifreezing agent and water according to the proportion to prepare a solution to form a material B.
5. The preparation method of the two-component negative temperature rapid repair mortar of claim 4, wherein in the step (3), the mixture is uniformly stirred for 3-5 min.
6. The use method of the two-component negative temperature rapid repair mortar according to any one of claims 1 to 3, characterized in that the material A and the material B are mixed on site to form the two-component negative temperature rapid repair mortar for rapid repair of bridges, roads and airport runways.
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Effective date of registration: 20210407 Address after: No. 972, 1st floor, No. 115, Shangzhuang Road, Shangzhuang Town, Haidian District, Beijing Patentee after: Youguda (Beijing) material technology Co.,Ltd. Address before: 110168 Liaoning province Shenyang Hunnan Hunnan Road No. 9 Patentee before: SHENYANG JIANZHU University |