CN110698150A - Anti-crack repair mortar and preparation method thereof - Google Patents
Anti-crack repair mortar and preparation method thereof Download PDFInfo
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- CN110698150A CN110698150A CN201911140549.XA CN201911140549A CN110698150A CN 110698150 A CN110698150 A CN 110698150A CN 201911140549 A CN201911140549 A CN 201911140549A CN 110698150 A CN110698150 A CN 110698150A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 78
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 21
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000004576 sand Substances 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 18
- 239000006004 Quartz sand Substances 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 239000004743 Polypropylene Substances 0.000 claims abstract description 15
- 239000011398 Portland cement Substances 0.000 claims abstract description 15
- 229920002310 Welan gum Polymers 0.000 claims abstract description 15
- 239000004816 latex Substances 0.000 claims abstract description 15
- 229920000126 latex Polymers 0.000 claims abstract description 15
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims abstract description 15
- 229910052808 lithium carbonate Inorganic materials 0.000 claims abstract description 15
- 239000004033 plastic Substances 0.000 claims abstract description 15
- -1 polypropylene Polymers 0.000 claims abstract description 15
- 229920001155 polypropylene Polymers 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005303 weighing Methods 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 238000009775 high-speed stirring Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 2
- 230000001795 light effect Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- JYGQDULZZKKFTG-UHFFFAOYSA-N OS([AlH2])(=O)=O Chemical compound OS([AlH2])(=O)=O JYGQDULZZKKFTG-UHFFFAOYSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
-
- 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
- C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of repair materials, and particularly relates to anti-crack repair mortar and a preparation method thereof. Aiming at the technical problem that the existing building industry is lack of a repair mortar with quick drying and good bonding property, the invention provides an anti-crack repair mortar, which comprises the following components: 5 to 20 percent of sulphoaluminate cement in percentage by weight; 25 to 40 percent of ordinary Portland cement; 5 to 10 percent of expanding agent; 20% -30% of quartz sand; 20 to 30 percent of ceramsite sand; 1 to 3 percent of redispersible latex powder; 0.01 to 0.04 percent of defoaming agent; (K12) 0.005% -0.05%; 0.001 to 0.01 percent of welan gum; 0.1 to 0.3 percent of water reducing agent; 0.01 to 0.04 percent of plastic expanding agent; 0 to 0.02 percent of lithium carbonate; 0.05 to 0.2 percent of polypropylene fiber; the sum of the weight of the components is 100 percent. The invention also provides a preparation method of the anti-crack repair mortar. The anti-crack repair mortar disclosed by the invention has the characteristics of light weight, early strength, high bonding performance and anti-crack performance, and has a good application prospect.
Description
Technical Field
The invention belongs to the technical field of repair materials, and particularly relates to anti-crack repair mortar and a preparation method thereof.
Background
The cement concrete has been applied to building engineering construction for hundreds of years, and plays a significant role in modernization career and economic development. However, as cement concrete has the defects of low tensile strength and large drying shrinkage, the buildings are easy to have concrete surface holes, surface peeling and cracking, and even have the problems of pulverization of concrete or mortar, bare reinforcing steel bars at structural parts and the like under the action of environmental external force along with the lapse of time.
In order to solve the problem of cement concrete in buildings, patent CN105036664A discloses an outdoor rapid repair mortar. The mortar is mainly composed of ordinary portland cement, sulpho-aluminum cement, sand, a defoaming agent, a water reducing agent, HPMC (hydroxy propyl methyl cellulose), rubber powder, lithium carbonate and citric acid, can be quickly hardened, has high strength and can be used for outdoor quick repair. However, the repair mortar of the patent is easy to crack after later hardening, and has poor later effect.
In the existing building industry, a repair mortar which is quick-drying and good in bonding property is still lacked to meet the requirements of the building industry, and the development is urgently needed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the prior building industry lacks a technical problem of quick-drying repair mortar with good bonding property.
The technical scheme for solving the technical problems comprises the following steps: provides an anti-crack repair mortar. The components of the composition comprise: according to the weight percentage, the weight percentage of the alloy is,
the sum of the weight of the components is 100 percent.
In the anti-crack repair mortar, the expanding agent is a concrete expanding agent. Preferably calcium sulphoaluminate-calcium oxide concrete expanding agent.
In the anti-crack repair mortar, the defoaming agent is a P803 powder defoaming agent.
In the anti-crack repair mortar, the water reducing agent is a Frank polycarboxylic acid water reducing agent.
In the anti-crack repair mortar, the particle size of the quartz sand is 40-70 meshes.
In the anti-crack repair mortar, the particle size of the ceramsite sand is 20-40 meshes.
The invention also provides a preparation method of the anti-crack repair mortar, which comprises the following steps:
a. weighing redispersible latex powder, a defoaming agent, K12, welan gum, a water reducing agent, a plastic expanding agent, lithium carbonate and polypropylene fiber according to the weight percentage;
b. adding the raw materials weighed in the step a into ordinary portland cement for premixing to obtain premix; and weighing sulphoaluminate cement, an expanding agent, quartz sand and ceramsite sand, and uniformly mixing with the premix to obtain the anti-crack repair mortar.
The invention also provides a use method of the anti-crack repair mortar, which comprises the following steps:
firstly, adding water according to the water-material ratio of 0.15-0.20, then adding the anti-crack repair mortar, and stirring at a high speed for 3-5 min.
In the use method of the anti-crack repair mortar, the high-speed stirring speed is 700 r/min-1200 r/min.
The invention has the beneficial effects that:
the invention provides the anti-crack repair mortar, which is innovatively added with light ceramsite sand, so that the mortar achieves the light effect, and can repair the quality problems of surface concrete or concrete quality problems of vault facades such as bridge, culvert and tunnel buildings and the like by combining the high bonding performance of the mortar. The crack-resistant repair mortar has light weight (dry density is not more than 1700 g/cm)3) Early strength (the strength can reach more than 10MPa in 3 h), high bonding performance (the tensile bonding strength is more than 2MPa, and the bending tensile strength of an interface is more than or equal to 2.5 MPa; JC/T2381-2016 repair mortar is more than or equal to 1MPa, the interface bending strength is more than or equal to 2MPa) and the crack resistance (the dry shrinkage rate is less than or equal to 0.02 percent) are realized, the coagulation time of the slurry can be adjusted through OPC-SAC binary gel (the coagulation time can be adjusted according to construction requirements, the adjustment range is 15-60 min), and therefore the construction time of the slurry can be controlled (controlled within 10-30 min), and the method has the advantages thatHas good application prospect.
Detailed Description
The invention provides anti-crack repair mortar which comprises the following components: according to the weight percentage, the weight percentage of the alloy is,
the sum of the weight of the components is 100 percent.
The invention is creatively added with a plastic expanding agent in the early hardening stage, so that the repair mortar is more fit with the surface to be repaired, and the dual anti-cracking mode of the expanding agent and the fiber is adopted in the later stage, so that the effect of 1+1 & gt 2 is obtained, and the repair mortar is ensured to have excellent anti-cracking performance.
The invention reduces the working performance of the repair mortar by matching the lightweight aggregate with K12 (air entraining agent), adjusts the hardening time of the whole repair material through an OPC-SAC binary gelling system, and ensures the crack resistance of the repair mortar through the bonding performance of redispersible latex powder and welan gum repair material slurry and adding polypropylene fiber and expanding agent; the repair mortar can be used for solving the quality problem of concrete on the building surface or repairing concrete easy-pulverization and falling positions of vault facades such as bridges, culverts, tunnels and the like by combining the light weight, early strength and high bonding performance of the repair mortar.
In the anti-crack repair mortar, the expanding agent is a concrete expanding agent. Preferably calcium sulphoaluminate to calcium oxide concrete expanding agents.
In the anti-crack repair mortar, the defoaming agent is a P803 powder defoaming agent.
In the anti-crack repair mortar, the water reducing agent is a powdery polycarboxylic acid water reducing agent.
Wherein, in order to prevent the plastering tool from being stuck during the plastering tool construction, the anti-cracking repair mortar cannot be too sticky, so the particle size of the quartz sand is required to be 40-70 meshes.
In the anti-crack repair mortar, the ceramsite sand is not suitable for being too large in particle size, thick in particle size, uneven in construction and surface and most suitable for being 20-40 meshes.
The invention also provides a preparation method of the anti-crack repair mortar, which comprises the following steps:
a. weighing redispersible latex powder, a defoaming agent, K12, welan gum, a water reducing agent, a plastic expanding agent, lithium carbonate and polypropylene fiber according to the weight percentage;
b. adding the raw materials weighed in the step a into ordinary portland cement for premixing to obtain premix; and weighing sulphoaluminate cement, an expanding agent, quartz sand and ceramsite sand, and uniformly mixing with the premix to obtain the anti-crack repair mortar.
The invention also provides a use method of the anti-crack repair mortar, which comprises the following steps:
firstly, adding water according to the water-material ratio of 0.15-0.20, then adding the anti-crack repair mortar, and stirring at a high speed for 3-5 min.
In the use method of the anti-crack repair mortar, the high-speed stirring speed is 700 r/min-1200 r/min.
The following examples are intended to illustrate specific embodiments of the present invention without limiting the scope of the invention to the examples.
Example 1 preparation of an anti-crack repair mortar according to the invention
The raw materials of the composition comprise:
15% of sulphoaluminate cement, 30% of ordinary portland cement, 5% of an expanding agent, 23.725% of quartz sand (40-70 meshes), 24% of ceramsite sand (20-40 meshes), 1.5% of redispersible latex powder, 0.02% of a defoaming agent, K120.01%, 0.005% of welan gum, 0.2% of a water reducing agent, 0.02% of a plastic expanding agent, 0.02% of lithium carbonate and 0.5% of polypropylene fibers.
The preparation method comprises the following steps:
a. weighing redispersible latex powder, a defoaming agent, K12, welan gum, a water reducing agent, a plastic expanding agent, lithium carbonate and polypropylene fiber according to the weight percentage;
b. adding the raw materials weighed in the step a into ordinary portland cement for premixing to obtain premix; and weighing sulphoaluminate cement, an expanding agent, quartz sand and ceramsite sand, and uniformly mixing with the premix to obtain the anti-crack repair mortar.
Example 2 preparation of an anti-crack repair mortar according to the invention
The raw materials of the composition comprise:
25% of sulphoaluminate cement, 20% of ordinary portland cement, 5% of an expanding agent, 23.725% of quartz sand (40-70 meshes), 24% of ceramsite sand (20-40 meshes), 1.5% of redispersible latex powder, 0.02% of a defoaming agent, K120.01%, 0.005% of welan gum, 0.2% of a water reducing agent, 0.02% of a plastic expanding agent, 0.02% of lithium carbonate and 0.5% of polypropylene fibers.
The preparation method comprises the following steps:
a. weighing redispersible latex powder, a defoaming agent, K12, welan gum, a water reducing agent, a plastic expanding agent, lithium carbonate and polypropylene fiber according to the weight percentage;
b. adding the raw materials weighed in the step a into ordinary portland cement for premixing to obtain premix; and weighing sulphoaluminate cement, an expanding agent, quartz sand and ceramsite sand, and uniformly mixing with the premix to obtain the anti-crack repair mortar.
Example 3 preparation of an anti-crack repair mortar according to the invention
The raw materials of the composition comprise:
20% of sulphoaluminate cement, 25% of ordinary portland cement, 5% of an expanding agent, 17.725% of quartz sand (40-70 meshes), 30% of ceramsite sand (20-40 meshes), 1.5% of redispersible latex powder, 0.02% of a defoaming agent, K120.01%, 0.005% of welan gum, 0.2% of a water reducing agent, 0.02% of a plastic expanding agent, 0.02% of lithium carbonate and 0.5% of polypropylene fibers.
The preparation method comprises the following steps:
a. weighing redispersible latex powder, a defoaming agent, K12, welan gum, a water reducing agent, a plastic expanding agent, lithium carbonate and polypropylene fiber according to the weight percentage;
b. adding the raw materials weighed in the step a into ordinary portland cement for premixing to obtain premix; and weighing sulphoaluminate cement, an expanding agent, quartz sand and ceramsite sand, and uniformly mixing with the premix to obtain the anti-crack repair mortar.
Comparative example 4 preparation of anti-crack repair mortar without the inventive formulation
The raw materials of the composition comprise:
35% of sulphoaluminate cement, 10% of ordinary portland cement, 5% of an expanding agent, 23.725% of quartz sand (40-70 meshes), 24% of ceramsite sand (20-40 meshes), 1.5% of redispersible latex powder, 0.02% of a defoaming agent, K120.01%, 0.005% of welan gum, 0.2% of a water reducing agent, 0.02% of a plastic expanding agent, 0.02% of lithium carbonate and 0.5% of polypropylene fibers.
The preparation method comprises the following steps:
a. weighing redispersible latex powder, a defoaming agent, K12, welan gum, a water reducing agent, a plastic expanding agent, lithium carbonate and polypropylene fiber according to the weight percentage;
b. adding the raw materials weighed in the step a into ordinary portland cement for premixing to obtain premix; and weighing sulphoaluminate cement, an expanding agent, quartz sand and ceramsite sand, and uniformly mixing with the premix to obtain the anti-crack repair mortar.
Comparative example 5 preparation of anti-crack repair mortar without the inventive formulation
The raw materials of the composition comprise:
15% of sulphoaluminate cement, 30% of ordinary portland cement, 5% of an expanding agent, 25.225% of quartz sand (40-70 meshes), 24% of ceramsite sand (20-40 meshes), 0% of redispersible latex powder, 0.02% of an antifoaming agent, K120.01%, 0.005% of welan gum, 0.2% of a water reducing agent, 0.02% of a plastic expanding agent, 0.02% of lithium carbonate and 0.5% of polypropylene fibers.
The preparation method comprises the following steps:
a. weighing redispersible latex powder, a defoaming agent, K12, welan gum, a water reducing agent, a plastic expanding agent, lithium carbonate and polypropylene fiber according to the weight percentage;
b. adding the raw materials weighed in the step a into ordinary portland cement for premixing to obtain premix; and weighing sulphoaluminate cement, quartz sand and ceramsite sand, and uniformly mixing with the premix to obtain the anti-crack repair mortar.
The performance of the anti-crack repair mortar prepared in the examples and the comparative examples is measured, the dry shrinkage is measured by adopting the method in JC/T603, the compression strength is measured by adopting the method in GB/T17671, the bending strength of the interface is measured by adopting the method in JC/T2381-2016, the density is measured by adopting a volumetric cylinder, and the initial setting is measured by adopting the method in GB/T1346-2019.
TABLE 1 different crack-resistant repair mortar Performance Table
From the results of the examples and comparative examples, it can be seen that: the traditional cement mortar dry density is 1800kg/m3The dry density of the repair mortar can reach 1600kg/m due to the addition of the lightweight aggregate3Left and right. The mortar is also added with a proper amount of air entraining agent, so that the wet density of the repair mortar is reduced, the light effect is achieved, and the dry density of the repair mortar is controllable within a certain range. The dry density of the repair mortar can be changed by changing the proportion of the ceramsite sand, the bonding performance (tensile bonding strength and interface bending tensile strength) of the repair mortar is improved, the setting time and the early strength of the whole repair material are adjusted by an OPC-SAC binary gelling system, and the light early-strength high-bonding-performance anti-crack repair mortar is obtained and has important practical significance.
Claims (10)
1. The anti-crack repair mortar is characterized by comprising the following components: according to the weight percentage, the weight percentage of the alloy is,
the sum of the weight of the components is 100 percent.
2. The anti-crack repair mortar according to claim 1, wherein: the expanding agent is a concrete expanding agent.
3. The crack-resistant repair mortar according to claim 2, wherein: the concrete expanding agent is calcium sulphoaluminate-calcium oxide concrete expanding agent.
4. The anti-crack repair mortar according to claim 1, wherein: the defoaming agent is a P803 powder defoaming agent.
5. The anti-crack repair mortar according to claim 1, wherein: the water reducing agent is a powder polycarboxylic acid water reducing agent.
6. The anti-crack repair mortar according to claim 1, wherein: the particle size of the quartz sand is 40-70 meshes.
7. The anti-crack repair mortar according to claim 1, wherein: the particle size of the ceramsite sand is 20-40 meshes.
8. The preparation method of the anti-crack repair mortar according to any one of claims 1 to 7, characterized by comprising the following steps:
a. weighing redispersible latex powder, a defoaming agent, K12, welan gum, a water reducing agent, a plastic expanding agent, lithium carbonate and polypropylene fiber according to the weight percentage;
b. adding the raw materials weighed in the step a into ordinary portland cement for premixing to obtain premix; and weighing sulphoaluminate cement, an expanding agent, quartz sand and ceramsite sand, and uniformly mixing with the premix to obtain the anti-crack repair mortar.
9. The use method of the anti-crack repair mortar according to any one of claims 1 to 7, characterized by comprising the following steps:
firstly, adding water according to the water-material ratio of 0.15-0.20, then adding the anti-crack repair mortar, and stirring at a high speed for 3-5 min.
10. The use method of the anti-crack repair mortar according to claim 9, wherein: the high-speed stirring speed is 700 r/min-1200 r/min.
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| CN110698150B CN110698150B (en) | 2022-02-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111875322A (en) * | 2020-08-07 | 2020-11-03 | 江苏智信达建筑科技有限公司 | Multi-component concrete composite repair mortar |
| CN112159186A (en) * | 2020-08-28 | 2021-01-01 | 郑州市王楼水泥工业有限公司 | Anti-crack repair mortar and preparation method thereof |
| CN112479657A (en) * | 2020-12-17 | 2021-03-12 | 十九冶成都建设有限公司 | Concrete crack repairing material and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387363A (en) * | 2013-08-19 | 2013-11-13 | 湖南交泰建材有限公司 | Cement-based repair mortar |
| CN108164225A (en) * | 2017-11-30 | 2018-06-15 | 河南中建西部建设有限公司 | Fibrous type limits expansive mortar and its dry-mixed mixture, wet mixing mixture, preparation method |
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| CN103387363A (en) * | 2013-08-19 | 2013-11-13 | 湖南交泰建材有限公司 | Cement-based repair mortar |
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| CN112159186A (en) * | 2020-08-28 | 2021-01-01 | 郑州市王楼水泥工业有限公司 | Anti-crack repair mortar and preparation method thereof |
| CN112479657A (en) * | 2020-12-17 | 2021-03-12 | 十九冶成都建设有限公司 | Concrete crack repairing material and preparation method thereof |
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| CN110698150B (en) | 2022-02-08 |
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