CN116239351A - Anti-dispersion repair mortar for underwater engineering and preparation method and application thereof - Google Patents
Anti-dispersion repair mortar for underwater engineering and preparation method and application thereof Download PDFInfo
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- CN116239351A CN116239351A CN202310094543.3A CN202310094543A CN116239351A CN 116239351 A CN116239351 A CN 116239351A CN 202310094543 A CN202310094543 A CN 202310094543A CN 116239351 A CN116239351 A CN 116239351A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 41
- 230000008439 repair process Effects 0.000 title claims abstract description 41
- 239000006185 dispersion Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 238000012407 engineering method Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 25
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000004568 cement Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010881 fly ash Substances 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 13
- 239000002893 slag Substances 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000006004 Quartz sand Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 9
- 229920002401 polyacrylamide Polymers 0.000 claims description 8
- 239000011398 Portland cement Substances 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 7
- 229910052925 anhydrite Inorganic materials 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 239000003469 silicate cement Substances 0.000 abstract description 10
- 239000011206 ternary composite Substances 0.000 abstract description 5
- 229910052602 gypsum Inorganic materials 0.000 abstract description 3
- 239000010440 gypsum Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 12
- 239000004567 concrete Substances 0.000 description 8
- 238000010998 test method Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- 235000012241 calcium silicate Nutrition 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
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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
- C04B28/02—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
- 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
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
-
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/16—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 calcium sulfate cements containing anhydrite, e.g. Keene's cement
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/74—Underwater applications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides anti-dispersion repair mortar for underwater engineering, and a preparation method and application thereof, wherein the anti-dispersion repair mortar for underwater engineering comprises the following raw material components in parts by weight: 60-120 parts of cementing material, 40-80 parts of active mixed material, 100-300 parts of fine aggregate, 1-4 parts of water reducer, 3-12 parts of anti-dispersant and 30-80 parts of water. The invention uses the sulfoaluminate cement-silicate cement-gypsum ternary composite material to replace the traditional silicate cement, and the ternary composite material has good quick setting, quick hardening and shrinkage compensation performances and has good application scene in the field of repair mortar.
Description
Technical Field
The invention relates to the field of repair mortar, in particular to anti-dispersion repair mortar for underwater engineering, and a preparation method and application thereof.
Background
In recent years, with the massive development of ocean resources in China, the number of underwater projects is increasing. At present, common concrete is generally used for underwater construction, the service period can be influenced by dry and wet circulation, chloride ion corrosion, sea wave impact and other aspects, and the repair is needed in time after diseases are generated, otherwise, the safe use and the durability of the whole structure are seriously influenced.
When the repairing construction is carried out under water, the cement mortar is easy to disperse and isolate when meeting water due to insufficient reaction after the concrete is mixed, so that the concrete can not reach the mark under water or completely lose mechanical strength and other performance indexes. In order to meet the needs of repairing underwater engineering, technicians in all countries around the world prepare the underwater anti-dispersion mortar by adding certain additives, so that the underwater anti-dispersion mortar can be washed by water, and the components can be ensured to be bonded together without segregation and dispersion. The core of the technology is that an additive of a water-soluble high polymer compound is added, long chains in the additive are mutually attracted and crossed to form a net structure with adsorption capacity, and cement particles are adsorbed together, so that all components of concrete can be adhered together when water is met, a large amount of cement loss can not be caused in direct underwater pouring construction, and the quality and strength of underwater pouring concrete are ensured.
In view of the fact that the most used matrix of the repair mortar for the underwater engineering is silicate cement at present, the repair mortar has the advantages of long setting time, low early strength and poor erosion resistance, and is difficult to meet the requirements of the underwater engineering.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an anti-dispersion repair mortar for underwater engineering, and a preparation method and application thereof, for solving the problems in the prior art.
In the technical scheme, the application prospect of the underwater anti-dispersion concrete and the excellent characteristics of the sulphoaluminate cement are combined, the sulphoaluminate cement is used for partially replacing the silicate cement, and the water reducer, the anti-dispersant agent and other additives and the solid waste are used for preparing the novel underwater non-dispersion repair mortar, so that the invention aims to provide application references for the design and preparation of the underwater engineering repair mortar.
To achieve the above and other related objects, the present invention is achieved by the following technical means.
The invention provides anti-dispersion repair mortar for underwater engineering, which comprises the following raw material components in parts by weight:
according to the technical scheme, the cementing material can be 60-65 parts, 65-70 parts, 70-75 parts, 75-80 parts, 80-85 parts, 85-90 parts, 90-95 parts, 95-100 parts, 100-105 parts, 105-110 parts, 110-115 parts or 115-120 parts.
According to the technical scheme of the application, the active mixed material can be 40-45 parts, 45-50 parts, 50-55 parts, 55-60 parts, 60-65 parts, 65-70 parts, 70-75 parts or 75-80 parts.
According to the technical scheme, the fine aggregate can be 100-110 parts, 110-120 parts, 120-130 parts, 130-140 parts, 140-150 parts, 150-160 parts, 160-170 parts, 170-180 parts, 180-190 parts, 190-200 parts, 200-210 parts, 210-220 parts, 220-230 parts, 230-240 parts, 240-250 parts, 250-260 parts, 260-270 parts, 270-280 parts, 280-290 parts or 290-300 parts.
According to the technical scheme, the water reducer can be 1 part, 2 parts, 3 parts or 4 parts.
According to the technical scheme of the application, the anti-dispersant can be 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts or 12 parts.
According to the technical scheme of the application, the water can be 30-35 parts, 35-40 parts, 40-45 parts, 45-50 parts, 50-55 parts, 55-60 parts, 60-65 parts, 65-70 parts, 70-75 parts or 75-80 parts.
Preferably, the cementing material is one or more selected from the group consisting of sulfoaluminate cement, portland cement, and anhydrite.
More preferably, the belite content in the sulphoaluminate cement is not less than 45%.
More preferably, the Portland cement is of the type PO42.5.
Preferably, the anhydrous calcium carbonate content in the anhydrous gypsum is not less than 80wt%.
More preferably, the gel material is a combination of sulfoaluminate cement, silicate cement and anhydrous gypsum, wherein the mass ratio of the sulfoaluminate cement to the silicate cement to the anhydrous gypsum is (25-30): (15-25): (10-15).
Preferably, the active mixture is one or more selected from fly ash and steel slag powder. More preferably, the fly ash is class i fly ash.
More preferably, the specific surface area of the steel slag powder is 400-500 m 2 Kg, may be 400m 2 /kg、410m 2 /kg、420m 2 /kg、430m 2 /kg、440m 2 /kg、450m 2 /kg、460m 2 /kg、470m 2 /kg、480m 2 /kg、490m 2 /kg or 500m 2 /kg。
More preferably, the calcium oxide content in the steel slag powder is not less than 35wt%.
More preferably, the active mixed material is a combination of fly ash and steel slag powder, and the mass ratio of the fly ash to the steel slag powder is (3-4): (1-4).
Preferably, the fine aggregate is one or more selected from quartz sand and copper tailing sand.
More preferably, the fine aggregate has a particle diameter of 0.15 to 0.30mm. More preferably, the fine aggregate is a combination of quartz sand and copper tailing sand, and the mass ratio of the quartz sand to the copper tailing sand is (4-5): (1-2).
Preferably, the anti-dispersant is one or more selected from polyacrylamide, UWB-II flocculant and polyaluminum sulfate.
More preferably, the number average molecular weight of the polyacrylamide is 10 to 15W. Such as 10W, 11W, 12W, 13W, 14W or 15W.
More preferably, the alumina content in the polyaluminum sulfate is 12 to 18 percent. Such as 12%, 13%, 14%, 15%, 16%, 17% or 18%.
More preferably, the polyaluminum sulphate has an iron content of not more than 0.1wt%.
Preferably, the water reducing agent is a polycarboxylate type water reducing agent.
More preferably, the water reducing agent has a water reduction rate of greater than 30%.
More preferably, the chloride ion content in the water reducing agent is not more than 0.3%.
The invention also provides a use method of the anti-dispersion repair mortar for the underwater engineering, which comprises the following steps:
1) Uniformly mixing the cementing material, the active mixed material and the fine aggregate;
2) Adding water reducer, anti-dispersant and water, and mixing to obtain slurry.
The invention also discloses a repair material formed by adopting the anti-dispersion repair mortar for the underwater engineering.
The invention also discloses the application of the repair material in underwater engineering.
Compared with the existing underwater engineering repair material: the invention has the following advantages:
1. the invention uses the sulfoaluminate cement-silicate cement-gypsum ternary composite material to replace the traditional silicate cement, and the ternary composite material has good quick setting, quick hardening and shrinkage compensation performances and has good application scene in the field of repair mortar.
2. The invention uses different underwater anti-dispersing agents to compound, effectively ensures the underwater anti-dispersing property, the anti-scouring property and the construction workability of the repairing material, and meets the requirement of convenient construction.
3. The invention uses more building solid wastes, accords with the policies of sustainable development, energy conservation and low carbon, and effectively realizes green energy conservation and efficient recycling of resources.
Drawings
FIG. 1 shows the water-land strength ratio of the repair mortar for underwater engineering and the repair material formed by the repair mortar for underwater engineering according to the embodiment of the invention.
Fig. 2 is a graph showing the effect of drying shrinkage property in examples and comparative examples of the present invention.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
It should be understood that the process equipment or devices not specifically identified in the examples below are all conventional in the art.
Furthermore, it is to be understood that the reference to one or more method steps in this disclosure does not exclude the presence of other method steps before or after the combination step or the insertion of other method steps between these explicitly mentioned steps, unless otherwise indicated. Moreover, unless otherwise indicated, the numbering of the method steps is merely a convenient tool for identifying the method steps and is not intended to limit the order of arrangement of the method steps or to limit the scope of the invention in which the invention may be practiced, as such changes or modifications in their relative relationships may be regarded as within the scope of the invention without substantial modification to the technical matter.
The embodiment of the application provides a specific anti-dispersion repair mortar for underwater engineering, which comprises the following raw material components in parts by weight: 60-120 parts of cementing material, 40-80 parts of active mixed material, 100-300 parts of fine aggregate, 1-4 parts of water reducer, 3-12 parts of anti-dispersant and 30-80 parts of water.
More specifically, the cementing material comprises 60 parts of active mixed material 40-80 parts, fine aggregate 100-150 parts, water reducer 1-4 parts, anti-dispersant agent 3-12 parts and water 30-40 parts.
The active mix may be 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, or 80 parts as described.
The fine aggregate may be 100 parts, 105 parts, 110 parts, 115 parts, 120 parts, 125 parts, 130 parts, 135 parts, 140 parts, 145 parts, or 150 parts as described.
The water reducer can be 1 part, 2 parts, 3 parts or 4 parts.
The anti-dispersant may be 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts or 12 parts as described.
The water may be 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, or 40 parts as described.
In the following examples of the present application, the indexes of specific raw material components are as follows:
the belite content in the sulphoaluminate cement is not less than 45%;
the model of the Portland cement is PO42.5;
the anhydrous calcium carbonate content in the anhydrous gypsum is not less than 80wt%;
the fly ash is class I fly ash;
the specific surface area of the steel slag powder is 450m 2 /kg；
The content of calcium oxide in the steel slag powder is not less than 35wt%;
the number average molecular weight of the polyacrylamide is 12W;
the content of alumina in the polyaluminum sulfate is 15%;
the iron content in the polyaluminum sulfate is not more than 0.1wt%;
the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate of the water reducing agent is more than 30%; the chloride ion content in the water reducer is not more than 0.3%.
Example 1
The embodiment provides anti-dispersion repair mortar for underwater engineering, which comprises the following raw material components in parts by mass: 25 parts of sulphoaluminate cement; 25 parts of Portland cement; 10 parts of gypsum; 30 parts of fly ash; 10 parts of steel slag powder; 100 parts of quartz sand and 20 parts of copper tailing sand; 1 part of water reducer and 3 parts of polyacrylamide; 36 parts of water.
Example 2
The embodiment provides an anti-dispersion repair mortar for underwater engineering and a preparation method thereof, wherein the anti-dispersion repair mortar comprises the following components in parts by mass: 30 parts of sulphoaluminate cement, 15 parts of silicate cement and 15 parts of anhydrous gypsum; 40 parts of fly ash; 20 parts of steel slag powder; 80 parts of quartz sand and 40 parts of copper tailing sand; 1 part of water reducer and 2 parts of polyacrylamide; 1 part of UWB-II flocculant; 36 parts of water.
Example 3
The embodiment provides an anti-dispersion repair mortar for underwater engineering and a preparation method thereof, wherein the anti-dispersion repair mortar comprises the following components in parts by mass: 30 parts of sulphoaluminate cement, 20 parts of silicate cement, 10 parts of anhydrous gypsum and 40 parts of fly ash; 40 parts of steel slag powder; 80 parts of quartz sand and 40 parts of copper tailing sand; 1 part of water reducer and 2 parts of polyacrylamide; 1 part of UWB-II flocculant; 1 part of polyaluminum sulfate; 36 parts of water.
Comparative example 1
Comparative example 1 differs from example 1 only in the cement and the anti-dispersant, which consists of the following components in parts by mass: 60 parts of silicate cement; 30 parts of fly ash; 10 parts of steel slag powder; 100 parts of quartz sand and 20 parts of copper tailing sand; 1 part of water reducer and 36 parts of water.
Comparative example 2
Comparative example 2 differs from example 1 only in the gelling material, which consists of the following components in parts by mass: 60 parts of silicate cement; 30 parts of fly ash; 10 parts of steel slag powder; 100 parts of quartz sand and 20 parts of copper tailing sand; 1 part of water reducer and 3 parts of polyacrylamide; 36 parts of water.
Comparative example 3
Comparative example 3 differs from example 1 only in that no anti-dispersant is used, and all other things are the same as example 1.
Comparative example 4
Comparative example 4 differs from example 1 only in that no water reducing agent was used, and all other things were the same as example 1.
The fluidity test method is the reference standard GB/T2419-2005 cement mortar fluidity test method, three fluidity tests are carried out on each group of test pieces, the arithmetic average value is taken, and the result is accurate to 0.1.
The test method of the content of suspended matters and the pH value is referred to the standard DL/T5117-2021 of underwater undispersed concrete test procedure.
Drawing bonding strength reference standard GB/T29756-2013 test method for physical Properties of Dry-mixed mortar.
The test method of the water-land strength ratio is referred to DL/T5117-2021, test procedure of underwater non-dispersed concrete.
The test method of the drying shrinkage rate refers to JGJ/T70-2009, basic performance test method of building mortar.
TABLE 1
As can be seen from Table 1, the working properties of the slurries in the examples were good, the suspension content was between 179 and 189mg/L, the pH value was between 9.26 and 9.78, the tensile bond strength was between 1.14 and 1.53, and the 28d flexural strength was between 8.8 and 10.3. The underwater dispersion resistance of the embodiment of the invention is good.
The application method of the anti-dispersion repair mortar for the underwater engineering in the embodiments 1 to 3 comprises the following steps:
1) Uniformly mixing the cementing material, the active mixed material and the fine aggregate;
2) Adding water reducer, anti-dispersant and water, and mixing to obtain slurry.
As can be seen from FIG. 1, the amphibious strength ratio of the materials formed by the mortar in the embodiments 1-3 of the invention is over 70%, so as to meet the requirement of underwater construction strength; and the early strength development of each embodiment is faster than that of the comparative example, and the 1d water-land strength ratio meets the requirement, so that the mixing of the sulphoaluminate cement can better promote the development speed of the underwater strength of the mortar. Example 3 incorporates more solid waste material than example 1, but the land to water strength ratio is not much different because the compounded flocculant flocculates better than a single flocculant.
As is clear from examples 1 and 3, the anti-dispersant significantly contributes to the underwater anti-dispersion performance of mortar. Fig. 2 shows that the drying shrinkage performance of each example is smaller than that of the comparative example, and the drying shrinkage of the example of the invention is smaller than that of the comparative example, because the ternary composite cementing material adopted by the invention has a certain micro-expansion effect and can effectively resist shrinkage cracking.
In conclusion, the performance of each embodiment is good, and the invention has good application value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. The anti-dispersion repair mortar for the underwater engineering is characterized by comprising the following raw material components in parts by weight:
2. the anti-dispersion repair mortar for underwater engineering according to claim 1, wherein the cementing material is one or more selected from the group consisting of sulfoaluminate cement, portland cement and anhydrite.
3. The anti-dispersion repair mortar for underwater engineering according to claim 2, wherein the gel material is a combination of sulfoaluminate cement, portland cement and anhydrite, and the mass ratio of the sulfoaluminate cement, the portland cement and the anhydrite is (25-30): (15-25): (10-15).
4. The anti-dispersion repair mortar for underwater engineering according to claim 1, wherein the active mixed material is one or more selected from fly ash and steel slag powder.
5. The anti-dispersion repair mortar for underwater engineering according to claim 1, wherein the fine aggregate is one or more selected from quartz sand and copper tailing sand.
6. The anti-dispersion repair mortar for underwater engineering according to claim 1, wherein the anti-dispersion agent is one or more selected from the group consisting of polyacrylamide, UWB-ii flocculant and polyaluminum sulfate.
7. The anti-dispersion repair mortar for underwater engineering according to claim 1, wherein the water reducing agent is a polycarboxylic acid type water reducing agent.
8. A method of using the anti-dispersion repair mortar for underwater engineering according to any one of claims 1 to 7, comprising the steps of:
1) Uniformly mixing the cementing material, the active mixed material and the fine aggregate;
2) Adding water reducer, anti-dispersant and water, and mixing to obtain slurry.
9. A repair material formed using the anti-dispersion repair mortar for underwater engineering according to any one of claims 1 to 7.
10. Use of the repair material according to claim 9 in underwater engineering.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117886577A (en) * | 2024-03-15 | 2024-04-16 | 堡森(上海)新材料科技有限公司 | Underwater non-dispersion backfill material and preparation method thereof |
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|---|---|---|---|---|
| CN103265254A (en) * | 2013-05-09 | 2013-08-28 | 西安理工大学 | Cement-based composite material used for engineering emergency maintenance, and preparation method and use method thereof |
| CN110183193A (en) * | 2019-07-11 | 2019-08-30 | 安徽瑞和新材料有限公司 | A kind of super-early strength cement base does not disperse patching material and preparation method thereof under water |
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- 2023-02-06 CN CN202310094543.3A patent/CN116239351A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265254A (en) * | 2013-05-09 | 2013-08-28 | 西安理工大学 | Cement-based composite material used for engineering emergency maintenance, and preparation method and use method thereof |
| CN110183193A (en) * | 2019-07-11 | 2019-08-30 | 安徽瑞和新材料有限公司 | A kind of super-early strength cement base does not disperse patching material and preparation method thereof under water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117886577A (en) * | 2024-03-15 | 2024-04-16 | 堡森(上海)新材料科技有限公司 | Underwater non-dispersion backfill material and preparation method thereof |
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