CN117822933A - High-performance repair mortar for hydraulic concrete and construction process thereof - Google Patents
High-performance repair mortar for hydraulic concrete and construction process thereof Download PDFInfo
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- CN117822933A CN117822933A CN202410012965.6A CN202410012965A CN117822933A CN 117822933 A CN117822933 A CN 117822933A CN 202410012965 A CN202410012965 A CN 202410012965A CN 117822933 A CN117822933 A CN 117822933A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 63
- 230000008439 repair process Effects 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000843 powder Substances 0.000 claims abstract description 37
- 229920000642 polymer Polymers 0.000 claims abstract description 22
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000839 emulsion Substances 0.000 claims abstract description 21
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 18
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 238000012423 maintenance Methods 0.000 claims abstract description 7
- 238000004381 surface treatment Methods 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 37
- 239000004576 sand Substances 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 21
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 20
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 20
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 20
- 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 claims description 20
- 239000012802 nanoclay Substances 0.000 claims description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 239000011863 silicon-based powder Substances 0.000 claims description 12
- 230000007480 spreading Effects 0.000 claims description 12
- 238000003892 spreading Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- 239000011398 Portland cement Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 229920001732 Lignosulfonate Polymers 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 25
- 238000005299 abrasion Methods 0.000 abstract description 21
- 238000007710 freezing Methods 0.000 abstract description 11
- 230000008014 freezing Effects 0.000 abstract description 8
- 239000000377 silicon dioxide Substances 0.000 abstract description 5
- 239000011083 cement mortar Substances 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 3
- 230000001680 brushing effect Effects 0.000 abstract 1
- 239000002585 base Substances 0.000 description 11
- 238000010257 thawing Methods 0.000 description 7
- 239000011148 porous material Substances 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 239000003469 silicate cement Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 244000226021 Anacardium occidentale Species 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000010220 ion permeability Effects 0.000 description 1
- -1 modified phenolic amine Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- OIGNJSKKLXVSLS-VWUMJDOOSA-N prednisolone Chemical compound O=C1C=C[C@]2(C)[C@H]3[C@@H](O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 OIGNJSKKLXVSLS-VWUMJDOOSA-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
- C04B28/04—Portland 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/10—Clay
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
- C04B14/4643—Silicates other than zircon
- C04B14/4656—Al-silicates, e.g. clay
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
-
- 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
- C04B2111/72—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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- General Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of hydraulic concrete repair, and discloses hydraulic concrete high-performance repair mortar and a construction process thereof, wherein the method comprises the following process flows: base surface treatment, interface treatment agent preparation, interface treatment agent brushing, hydraulic concrete high-performance repair mortar preparation, high-performance mortar repair and maintenance. In order to realize the purpose of increasing the frost resistance of the hydraulic concrete repair mortar, the invention modifies the cement mortar by doping the polymer acrylic emulsion and the instant rubber powder, and forms a continuous film in the mortar, thereby playing a role in preventing seepage, further improving the frost resistance, improving the workability of the mortar, improving the bonding strength and the abrasion resistance, reducing shrinkage and improving the crack resistance. Meanwhile, the freezing resistance of the mortar is improved by adding the air-entraining water reducer. In order to realize the anti-abrasion performance of the repair mortar, the anti-abrasion performance is improved by doping silica powder and basalt fiber.
Description
Technical Field
The invention belongs to the technical field of hydraulic concrete repair, and particularly relates to hydraulic concrete high-performance repair mortar and a construction process thereof.
Background
Hydraulic concrete is often damaged by combined actions of freeze thawing cycle, water flow flushing and ice load, so that the function failure of the concrete structure is easily caused, and the normal operation of hydraulic engineering is influenced. In particular, the phenomenon of freeze thawing damage to the concrete frequently occurs at the positions of the water level change area, and concrete is generally degraded, and if the positions are to be repaired, the repair material must have higher impermeability, freezing resistance and anti-abrasion performance, and higher bonding strength, and in addition, a proper construction process must be selected, otherwise, secondary damage is extremely easy to occur, so that hydraulic concrete is completely abandoned before repair.
The application number CN 107935520A discloses a high-performance polymer repair mortar, which is mainly prepared from sulphoaluminate cement and ordinary silicate cement, has strong binding force with a concrete member after construction, does not crack or shrink after hardening, has high strength, good freeze-thawing resistance, salt-thawing resistance, fluoride ion permeability resistance and durability. However, the embodiment does not see the anti-freezing effect, has no anti-abrasion performance and is not suitable for repairing the hydraulic concrete overflow surface.
The application number CN 106242372A discloses an underwater epoxy repair mortar and a preparation method thereof, the method takes bisphenol A type epoxy resin and cashew shell oil modified phenolic amine curing agent as main materials, the underwater epoxy mortar can be rapidly cured and has higher bonding strength and acid and alkali corrosion resistance, the split tensile strength, the bonding strength and the breaking strength tested in the embodiment are higher, but the compressive strength is not high, the effects of freeze thawing resistance and anti-abrasion performance are not seen, the underwater epoxy repair mortar has high price from the component, the process is complex, and the method is suitable for small-area repair and plugging and is not suitable for large-area degraded repair of hydraulic concrete.
Based on the defects, the hydraulic concrete, particularly the overflow surface, is convenient and quick to repair, has strong bonding force with the concrete base surface after repair, and has good compression strength, freeze thawing resistance and anti-abrasion performance, so the hydraulic concrete is a problem to be solved by the invention.
The present invention has been made in view of this.
Disclosure of Invention
In order to solve the problems, how to repair hydraulic concrete, especially overflow surface, simply and quickly, and the adhesive force between the repaired hydraulic concrete and the concrete base surface is strong, the compressive strength, the freeze thawing resistance and the anti-abrasion performance are all good, the invention adopts the technical scheme that:
a construction process of hydraulic concrete high-performance repair mortar comprises the following process flows:
step S1, basal surface treatment: the base surface of the damaged concrete is treated, the loose and degraded part of the surface is chiseled to a hard layer, and the hard layer is washed by a high-pressure water gun;
step S2, preparing an interface treating agent: slowly adding 2-5 parts of rubber powder into 600-650 parts of stirring water to prepare the glue, continuously stirring, slowly adding 1000 parts of cement, 10-15 parts of polymer acrylic emulsion and 1-5 parts of hydroxypropyl methyl cellulose, and stirring to obtain slurry; the mixture is stirred in the process and is used up in half an hour;
step S3, coating an interface treating agent: after the basal surface is treated and no clear water exists, the prepared interface treating agent is coated on the basal surface by using a rolling brush or a row brush, and the coating is required to be uniform and no leakage point exists;
s4, preparing hydraulic concrete high-performance repair mortar: 1000 parts of cement, 150-200 parts of white cement, 1000-2000 parts of sand, 100-150 parts of polymer acrylic emulsion, 30-50 parts of silicon powder, 2-5 parts of rubber powder, 1-3 parts of nanoclay, 1-5 parts of hydroxypropyl methyl cellulose, 1-1.5 parts of basalt fiber, 10-15 parts of SKY air-entraining water reducer, 300-350 parts of mixing water, and placing into a stirrer, wherein forced stirring is adopted, and the stirred mortar is used up within 45 minutes;
step S5, repairing high-performance mortar: spreading the mixed mortar on the part to be repaired by using a spatula according to actual conditions, spreading the mortar continuously in the same direction as much as possible, compacting and leveling while spreading, compacting and exhausting at the joint, wherein the thickness of the planar coating is not more than 3cm, the thickness of the elevation coating is not more than 2cm, and layering and spreading are performed so as to avoid void; when the repairing area is too large, the construction joint or the staggered construction of the segments should be reserved, and each block of the repairing area should not exceed 10-15m 2 Staggering the construction time to be not less than 24 hours;
step S6, maintenance: after the construction is finished, spraying or covering a straw curtain or a gunny bag and the like to keep moist after the surface is dried, wherein the maintenance temperature is not lower than 5 ℃; after 24 hours, the mixture is covered with plastic cloth and kept warm for 7 days.
The invention also discloses a hydraulic concrete high-performance repair mortar, which comprises the following components in parts by mass:
1000 parts of cement, 150-200 parts of white cement, 1000-2000 parts of sand, 100-150 parts of polymer acrylic emulsion, 30-50 parts of silicon powder, 2-5 parts of instant rubber powder, 1-3 parts of nanoclay, 1-5 parts of hydroxypropyl methyl cellulose, 1-1.5 parts of basalt fiber, 10-15 parts of SKY air-entraining water reducer and 300-350 parts of mixing water.
As a preferred embodiment of the present invention, the cement is one of Portland cement p.O42.5 or p.O52.5 cement.
As a preferred embodiment of the present invention, the white cement is one of white Portland cement 42.5 or 52.5 cement; the color matching agent is used for mixing colors, so that the color of the repaired part is close to that of old concrete.
As a preferred embodiment of the present invention, the sand is one of natural sand or artificial sand; the specification is that the middle sand has the mud content not more than 3 percent.
As a preferred embodiment of the present invention, the polymer acrylic emulsion has a solids content of 55%; siO in the silicon powder 2 The content is more than 85 percent, and the specific surface area is more than 15000m 2 /kg。
As a preferred embodiment of the present invention, the rubber powder is one of 801-speed sol powder or 901-speed sol powder; the nano clay is white powder, and the average particle size of the particles is 1-100nm.
As a preferred embodiment of the present invention, the hydroxypropyl methylcellulose has a viscosity of 20 ten thousand or more.
As a preferred embodiment of the invention, the basalt fiber is one of a monofilament diameter of 13 μm and a length of 3mm or 6 mm.
As a preferred embodiment of the invention, the SKY air-entraining water reducer is an air-entraining water reducer with lignosulfonate as a water-reducing component.
Compared with the prior art, the invention has the following beneficial effects:
in order to realize the purpose of increasing the frost resistance of the hydraulic concrete repair mortar, the invention modifies the cement mortar by doping the polymer acrylic emulsion and the instant rubber powder, and forms a continuous film in the mortar, thereby playing a role in preventing seepage, further improving the frost resistance, improving the workability of the mortar, improving the bonding strength and the abrasion resistance, reducing shrinkage and improving the crack resistance. Meanwhile, the freezing resistance of the mortar is improved by adding the air-entraining water reducer. In order to realize the anti-abrasion performance of the repair mortar, the anti-abrasion performance is improved by doping silica powder and basalt fiber, meanwhile, the anti-freezing performance is also improved by doping silica powder, and the anti-cracking performance of the mortar is also improved by doping basalt fiber. The adhesive strength of the repair mortar is improved by adding hydroxypropyl methyl cellulose and instant rubber powder. The nano clay is doped to effectively inhibit the development of ultra-large pores in the concrete, reduce harmful pores and improve the impermeability and frost resistance of the concrete. The color of the repaired part is close to that of the old concrete after repairing by mixing white silicate cement, so that the appearance quality of the repaired concrete is improved.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
In the drawings:
FIG. 1 is a schematic diagram of the process flow of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention.
A construction process of hydraulic concrete high-performance repair mortar comprises the following process flows:
step S1, basal surface treatment: the base surface of the damaged concrete is treated, the loose and degraded part of the surface is chiseled to a hard layer, and the hard layer is washed by a high-pressure water gun;
step S2, preparing an interface treating agent: slowly adding 2-5 parts of rubber powder into 600-650 parts of stirring water to prepare the glue, continuously stirring, slowly adding 1000 parts of cement, 10-15 parts of polymer acrylic emulsion and 1-5 parts of hydroxypropyl methyl cellulose, and stirring to obtain slurry; the mixture is stirred in the process and is used up in half an hour;
step S3, coating an interface treating agent: after the basal surface is treated and no clear water exists, the prepared interface treating agent is coated on the basal surface by using a rolling brush or a row brush, and the coating is required to be uniform and no leakage point exists;
s4, preparing hydraulic concrete high-performance repair mortar: 1000 parts of cement, 150-200 parts of white cement, 1000-2000 parts of sand, 100-150 parts of polymer acrylic emulsion, 30-50 parts of silicon powder, 2-5 parts of rubber powder, 1-3 parts of nanoclay, 1-5 parts of hydroxypropyl methyl cellulose, 1-1.5 parts of basalt fiber, 10-15 parts of SKY air-entraining water reducer, 300-350 parts of mixing water, and placing into a stirrer, wherein forced stirring is adopted, and the stirred mortar is used up within 45 minutes;
step S5, repairing high-performance mortar: spreading the mixed mortar on the part to be repaired by using a spatula according to actual conditions, spreading the mortar continuously in the same direction as much as possible, compacting and leveling while spreading, compacting and exhausting at the joint, wherein the thickness of the planar coating is not more than 3cm, the thickness of the elevation coating is not more than 2cm, and layering and spreading are performed so as to avoid void; when the repairing area is too large, the construction joint or the staggered construction of the segments should be reserved, and each block of the repairing area should not exceed 10-15m 2 Staggering the construction time to be not less than 24 hours;
step S6, maintenance: after the construction is finished, spraying or covering a straw curtain or a gunny bag and the like to keep moist after the surface is dried, wherein the maintenance temperature is not lower than 5 ℃; after 24 hours, the mixture is covered with plastic cloth and kept warm for 7 days.
The invention also discloses a hydraulic concrete high-performance repair mortar, which comprises the following components in parts by mass:
1000 parts of cement, 150-200 parts of white cement, 1000-2000 parts of sand, 100-150 parts of polymer acrylic emulsion, 30-50 parts of silicon powder, 2-5 parts of instant rubber powder, 1-3 parts of nanoclay, 1-5 parts of hydroxypropyl methyl cellulose, 1-1.5 parts of basalt fiber, 10-15 parts of SKY air-entraining water reducer and 300-350 parts of mixing water.
Further, the cement is one of ordinary Portland cement P.O42.5 or P.O52.5 cement; the white cement is one of white Portland cement 42.5 or 52.5 cement; the color matching is used for matching colors, so that the color of the repaired part is close to that of old concrete; the sand is one of natural sand or artificial sand; the specification is that the middle sand has the mud content not more than 3 percent; the solid content of the polymer acrylic emulsion is 55%; siO in silicon powder 2 The content is more than 85 percent, and the specific surface area is more than 15000m 2 /kg; the rubber powder is 801 quick sol powder or 901 quick solOne of the powders; the nano clay is white powder, and the average particle size of the particles is 1-100nm; hydroxypropyl methylcellulose is 20 ten thousand viscosity or more; basalt fiber is one of monofilament diameter 13 μm and length 3mm or 6 mm; the SKY air-entraining water reducer is an air-entraining water reducer taking lignosulfonate as a water-reducing component.
Example 1:
adding 2 parts of 801 rubber powder into 600 parts of stirring water slowly to prepare the glue, continuing stirring, adding 1000 parts of P.O42.5 cement, 10 parts of polymer acrylic emulsion and 1 part of hydroxypropyl methyl cellulose slowly, stirring into slurry, preparing an interface treating agent, treating a concrete base surface, and smearing the treated concrete base surface on a base surface. Meanwhile, 1000 parts of P.O42.5 cement, 150 parts of white cement, 1000 parts of natural sand, 100 parts of polymer acrylic emulsion, 30 parts of silicon powder, 2 parts of 801 rubber powder, 1 part of nanoclay, 1 part of hydroxypropyl methyl cellulose, 1 part of basalt fiber, 10 parts of SKY type air entraining water reducer, and 300 parts of mixed water are put into a stirrer to prepare the high-performance repair mortar by forced stirring. The repairing process is to prepare compressive strength, splitting tensile strength, frost resistance and abrasion resistance test pieces by sampling, and test the samples after 28 days, wherein the frost resistance test adopts a quick freezing method, and the abrasion resistance test adopts an underwater steel ball method. The results are shown in Table 1.
Table 1 example 1 test results
Example 2:
3 parts of 801 rubber powder is slowly added into 620 parts of stirred water to prepare the glue, stirring is continued, 1000 parts of P.O42.5 cement and 12 parts of polymer acrylic emulsion are slowly added, 3 parts of hydroxypropyl methyl cellulose are stirred into slurry, an interface treating agent is prepared, and the surface of the concrete is coated on a base surface after being treated. Meanwhile, 1000 parts of P.O42.5 cement, 170 parts of white cement, 1500 parts of natural sand, 120 parts of polymer acrylic emulsion, 40 parts of silicon powder, 4 parts of 801 rubber powder, 2 parts of nanoclay, 3 parts of hydroxypropyl methyl cellulose, 1.2 parts of basalt fiber, 12 parts of SKY type air entraining water reducer, and 320 parts of mixed water are put into a stirrer to prepare the high-performance repair mortar by forced stirring. The repairing process is to prepare compressive strength, splitting tensile strength, frost resistance and abrasion resistance test pieces by sampling, and test the samples after 28 days, wherein the frost resistance test adopts a quick freezing method, and the abrasion resistance test adopts an underwater steel ball method. The results are shown in Table 2.
Table 2 example 2 test results
Example 3:
slowly adding 5 parts of 801 rubber powder into 650 parts of stirred water to prepare the glue, continuously stirring, slowly adding 1000 parts of P.O42.5 cement, 15 parts of polymer acrylic emulsion and 5 parts of hydroxypropyl methyl cellulose, stirring into slurry, preparing an interface treating agent, treating a concrete base surface, and smearing the treated concrete base surface on a base surface. Meanwhile, 1000 parts of P.O42.5 cement, 200 parts of white cement, 2000 parts of sand, 150 parts of polymer acrylic emulsion, 50 parts of silicon powder, 5 parts of 801 rubber powder, 3 parts of nanoclay, 5 parts of hydroxypropyl methyl cellulose, 1.5 parts of basalt fiber, 15 parts of SKY type air entraining water reducer, and 350 parts of mixed water are put into a stirrer to prepare the high-performance repair mortar by forced stirring. The repairing process is to prepare compressive strength, splitting tensile strength, frost resistance and abrasion resistance test pieces by sampling, and test the samples after 28 days, wherein the frost resistance test adopts a quick freezing method, and the abrasion resistance test adopts an underwater steel ball method. The results are shown in Table 3.
Table 3 example 3 test results
The embodiment shows that the hydraulic concrete high-performance repair mortar provided by the invention has higher early strength and 28-day-age strength, and the material consumption can be increased or decreased according to actual conditions during application; the freezing resistance cycle is more than 300 times, so that the hydraulic engineering requirement is met; the anti-abrasion strength is better, and the performance is better than that of the original engineering common concrete; the splitting tensile strength is more than 2.0MPa, which indicates that the bonding strength is also better, and the bonding requirement of new and old interfaces of concrete is met.
In order to realize the purpose of increasing the frost resistance of the hydraulic concrete repair mortar, the cement mortar is modified by doping the polymer acrylic emulsion and the instant rubber powder, and a continuous film is formed in the mortar, so that the cement mortar has the effects of preventing seepage, further improving the frost resistance, improving the mortar workability, improving the bonding strength and the abrasion resistance, reducing shrinkage and improving the crack resistance. Meanwhile, the freezing resistance of the mortar is improved by adding the air-entraining water reducer. In order to realize the anti-abrasion performance of the repair mortar, the anti-abrasion performance is improved by doping silica powder and basalt fiber, meanwhile, the anti-freezing performance is also improved by doping silica powder, and the anti-cracking performance of the mortar is also improved by doping basalt fiber. The adhesive strength of the repair mortar is improved by adding hydroxypropyl methyl cellulose and instant rubber powder. The nano clay is doped to effectively inhibit the development of ultra-large pores in the concrete, reduce harmful pores and improve the impermeability and frost resistance of the concrete. The color of the repaired part is close to that of the old concrete after repairing by mixing white silicate cement, so that the appearance quality of the repaired concrete is improved.
Claims (10)
1. The construction process of the hydraulic concrete high-performance repair mortar is characterized by comprising the following process flows:
step S1, basal surface treatment: the base surface of the damaged concrete is treated, the loose and degraded part of the surface is chiseled to a hard layer, and the hard layer is washed by a high-pressure water gun;
step S2, preparing an interface treating agent: slowly adding 2-5 parts of rubber powder into 600-650 parts of stirring water to prepare the glue, continuously stirring, slowly adding 1000 parts of cement, 10-15 parts of polymer acrylic emulsion and 1-5 parts of hydroxypropyl methyl cellulose, and stirring to obtain slurry; the mixture is stirred in the process and is used up in half an hour;
step S3, coating an interface treating agent: after the basal surface is treated and no clear water exists, the prepared interface treating agent is coated on the basal surface by using a rolling brush or a row brush, and the coating is required to be uniform and no leakage point exists;
s4, preparing hydraulic concrete high-performance repair mortar: 1000 parts of cement, 150-200 parts of white cement, 1000-2000 parts of sand, 100-150 parts of polymer acrylic emulsion, 30-50 parts of silicon powder, 2-5 parts of rubber powder, 1-3 parts of nanoclay, 1-5 parts of hydroxypropyl methyl cellulose, 1-1.5 parts of basalt fiber, 10-15 parts of SKY air-entraining water reducer, 300-350 parts of mixing water, and placing into a stirrer, wherein forced stirring is adopted, and the stirred mortar is used up within 45 minutes;
step S5, repairing high-performance mortar: spreading the mixed mortar on the part to be repaired by using a spatula according to actual conditions, spreading the mortar continuously in the same direction as much as possible, compacting and leveling while spreading, compacting and exhausting at the joint, wherein the thickness of the planar coating is not more than 3cm, the thickness of the elevation coating is not more than 2cm, and layering and spreading are performed so as to avoid void; when the repairing area is too large, the construction joint or the staggered construction of the segments should be reserved, and each block of the repairing area should not exceed 10-15m 2 Staggering the construction time to be not less than 24 hours;
step S6, maintenance: after the construction is finished, spraying or covering a straw curtain or a gunny bag and the like to keep moist after the surface is dried, wherein the maintenance temperature is not lower than 5 ℃; after 24 hours, the mixture is covered with plastic cloth and kept warm for 7 days.
2. The hydraulic concrete high-performance repair mortar prepared in the construction process of the hydraulic concrete high-performance repair mortar according to claim 1, which is characterized by comprising the following components in mass percent:
1000 parts of cement, 150-200 parts of white cement, 1000-2000 parts of sand, 100-150 parts of polymer acrylic emulsion, 30-50 parts of silicon powder, 2-5 parts of instant rubber powder, 1-3 parts of nanoclay, 1-5 parts of hydroxypropyl methyl cellulose, 1-1.5 parts of basalt fiber, 10-15 parts of SKY air-entraining water reducer and 300-350 parts of mixing water.
3. The hydraulic concrete high performance repair mortar of claim 2, wherein the cement is one of Portland cement P.O42.5 or P.O52.5 cement.
4. The hydraulic concrete high performance repair mortar of claim 2, wherein the white cement is one of white Portland cement 42.5 or 52.5 cement; the color matching agent is used for mixing colors, so that the color of the repaired part is close to that of old concrete.
5. The hydraulic concrete high performance repair mortar of claim 2, wherein the sand is one of natural sand or artificial sand; the specification is that the middle sand has the mud content not more than 3 percent.
6. The hydraulic concrete high performance repair mortar of claim 2, wherein the polymer acrylic emulsion has a solids content of 55%; siO in the silicon powder 2 The content is more than 85 percent, and the specific surface area is more than 15000m 2 /kg。
7. The hydraulic concrete high-performance repair mortar according to claim 2, wherein the rubber powder is one of 801-speed sol powder or 901-speed sol powder; the nano clay is white powder, and the average particle size of the particles is 1-100nm.
8. The high-performance repair mortar for hydraulic concrete according to claim 2, wherein the hydroxypropyl methylcellulose has a viscosity of 20 ten thousand or more.
9. The hydraulic concrete high performance repair mortar of claim 2, wherein the basalt fiber is one of a monofilament diameter of 13 μm and a length of 3mm or 6 mm.
10. The high-performance repair mortar for hydraulic concrete according to claim 2, wherein the SKY air water reducer is an air water reducer with lignosulfonate as a water reducing component.
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