CN111285645A - Anti-radiation concrete screw hole plugging filler - Google Patents
Anti-radiation concrete screw hole plugging filler Download PDFInfo
- Publication number
- CN111285645A CN111285645A CN201811502893.4A CN201811502893A CN111285645A CN 111285645 A CN111285645 A CN 111285645A CN 201811502893 A CN201811502893 A CN 201811502893A CN 111285645 A CN111285645 A CN 111285645A
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- Prior art keywords
- screw hole
- water
- filler
- portland cement
- fly ash
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00715—Uses not provided for elsewhere in C04B2111/00 for fixing bolts or the like
Abstract
The invention provides a radiation-proof concrete screw hole plugging filler which comprises ordinary portland cement, fly ash, quartz sand, silica powder, optional middle ash cement regulator and water, and (a) metakaolin and magnesium oxide or (b) emulsion. The anti-radiation concrete screw hole plugging filler has good anti-shrinkage and bonding capabilities, and no shrinkage trace is observed on the edge of a screw hole visually after the screw hole is plugged by the filler for 28 days.
Description
Technical Field
The invention belongs to the field of concrete screw hole plugging materials, and particularly relates to a radiation-proof concrete screw hole plugging filler.
Background
The traditional concrete screw hole plugging filler is mostly made of cement mortar, waterproof agent or epoxy cement and the like, and the main purpose is that the screw hole plugging filler does not cause leakage and falling at the part; however, when the materials are used as the screw hole filler, contraction micro-cracks on the periphery of the screw hole generally appear, so that the wall with the screw hole has the defects of obvious traces, peeling of a coating at the area of the screw hole and the like in the coating construction; as for radiation-proof concrete, the design requirement of a wall body of the radiation-proof concrete is that the radiation-proof concrete has relatively safe radiation-proof capability, and the plugging filler of the screw hole has stronger bonding capability and anti-shrinkage force and the strength grade of the concrete is higher than that of the original wall body.
There is a need in the art to develop a material that effectively plugs screw holes.
Disclosure of Invention
The invention aims to provide a radiation-proof concrete screw hole plugging filler which has stronger cohesive force and anti-shrinkage force and is higher than the strength grade of original wall concrete.
The technical scheme provided by the invention for realizing the purpose is as follows:
a screw hole filler is provided, which comprises ordinary portland cement, fly ash, quartz sand, silica powder, an optional middle ash cement regulator and water, and a component (a) metakaolin and magnesium oxide or a component (b) emulsion; wherein the content of the first and second substances,
the ordinary portland cement is p.42.5 ordinary portland cement or p.52.5 ordinary portland cement;
the fly ash is F class 1 or F class 2 fly ash;
the emulsion is acrylic emulsion, silicone-acrylic emulsion or pure acrylic emulsion.
Preferably, the screw hole filler comprises ordinary portland cement, fly ash, quartz sand, silica powder, metakaolin, magnesium oxide and water;
based on the total weight of the filler,
preferably, the screw hole filler comprises ordinary portland cement, fly ash, quartz sand, silica powder, metakaolin, magnesium oxide and water; wherein the content of the first and second substances,
preferably, the screw hole filler comprises ordinary portland cement, fly ash, quartz sand, silica powder, emulsion, a middle ash cement regulator and water;
based on the total weight of the filler,
preferably, the screw hole filler comprises ordinary portland cement, fly ash, quartz sand, silica powder, emulsion, a middle ash cement regulator and water; wherein the content of the first and second substances,
preferably, the mesh number of the quartz sand is controlled within 18 to 20 meshes.
Preferably, the metakaolin mesh number is controlled within 800 to 1500 meshes.
Preferably, the mesh number of the silica powder is controlled within 800 to 1000 meshes.
Preferably, the screw hole filling material is used for filling screw holes with the diameter of 14MM, 16MM or 18 MM.
Preferably, the screw hole filling material is used for radiation-proof concrete with the strength grade of C30-C60.
The preparation method of the screw hole filling material is provided, and the screw hole filling material comprises ordinary portland cement, fly ash, quartz sand, silicon dioxide powder, metakaolin, magnesium oxide and water; the method comprises the following steps:
(1) before burdening, moistening the screw holes with water; weighing the above components;
(2) mixing and stirring the weighed components uniformly;
(3) placing the obtained filler into the screw hole by the small scraper knife until the surface is dense; the filled screw holes are uniformly sprayed with water after 6 hours until the screw holes are maintained, and the water is sprayed for maintenance once at intervals of 3 hours.
The preparation method of the screw hole filling material is provided, and the screw hole filling material comprises ordinary portland cement, fly ash, quartz sand, silica powder, emulsion, medium-ash cement blending agent and water; the method comprises the following steps:
(1) before burdening, moistening the screw holes with water; weighing the above components;
(2) mixing and uniformly stirring a part of the weighed water and the acrylic emulsion for later use; mixing the other part of the weighed water with the lime cement blending agent uniformly for later use;
(3) mixing and uniformly stirring the weighed p.42.5 ordinary portland cement, fly ash, quartz sand and silicon dioxide powder for later use;
(4) uniformly mixing the mixture obtained in the step (2) and the mixture obtained in the step (3);
(5) placing the filler obtained in the step (4) into the screw hole by a small shovel cutter until the surface is dense; the filled screw holes are uniformly sprayed with water after 6 hours until the screw holes are maintained, and the water is sprayed for maintenance once at intervals of 3 hours.
The invention has the following beneficial effects:
firstly, the strength grade of the anti-radiation concrete screw hole plugging filler is higher than the original concrete strength grade by one grade, namely if the original concrete is C30, the strength grade of the plugging filler is C35; and secondly, the anti-radiation concrete screw hole plugging filler has good anti-shrinkage and bonding capabilities, and no shrinkage trace is observed on the edge of a screw hole visually after the screw hole is plugged by the filler for 28 days.
Detailed Description
The anti-radiation concrete screw hole plugging filler can also be referred to as screw hole filler for short.
The anti-radiation concrete screw hole plugging filler can be used for anti-radiation concrete with different grades of strength. For example, the concrete can be used for the radiation-proof concrete with the strength grade of C30-C60. Specifically, the concrete can be used for radiation-proof concrete with the strength grade of C30; or for radiation protective concrete with strength grade C35; or for radiation protective concrete with strength grade C40; or aiming at the radiation-proof concrete with the strength grade of C45-C60.
The anti-radiation concrete screw hole plugging filler can comprise ordinary portland cement, fly ash, quartz sand, silicon dioxide powder, metakaolin, magnesium oxide and water.
The anti-radiation concrete screw hole plugging filler can comprise ordinary portland cement, fly ash, quartz sand, silica powder, acrylic emulsion, medium-ash cement regulator and water.
The ordinary portland cement is p.42.5 ordinary portland cement or p.52.5 ordinary portland cement. p.42.5 Portland Cement, Standard GB 175-2007. The Portland cement is not 32.5R Portland cement and slag cement of any grade.
The fly ash is F class 1 or F class 2 fly ash. The I-grade fly ash has the execution standard of GB/T1596-2005. The fly ash plays a role in reducing the cement consumption, reducing the hydration heat and filling other materials in the screw hole filling material.
The quartz sand has a pH value index requirement within 6.0, a specification of 1.0-0.850 Mm, and a mesh number controlled within 18-20 meshes. The quartz sand plays a role in improving the strength of the filling material and has excellent durability in the screw hole filling material.
The silicon dioxide powder is in the range of 800-1000 meshes.
The metakaolin is within 800-1500 meshes of specification requirements. The metakaolin in the screw hole filler can improve the strength of cement paste and the filler, reduce the capillary pores of the filler, and improve the freeze-thaw resistance, corrosion resistance, wear resistance and other properties.
The magnesium oxide (trade name is MAc magnesium high-performance anti-cracking agent), the production execution standard of Wuhan three-source special building materials GmbH: Q/WsY 026-2006, pH within the range of plus or minus 5.5. Those skilled in the art can use the same type of crack resistance agent commercially available instead of magnesium oxide. The magnesium high-performance anti-cracking agent plays an important role in preventing the shrinkage of the filling material and improving the compactness of the filling material in the screw hole filling material;
the pH value of the acrylic emulsion is less than or equal to 8.5. The acrylic emulsion plays the roles of water resistance, static resistance, filler adhesion property improvement, ageing resistance, alkali resistance and corrosion resistance in the screw hole filler.
The acrylic emulsion can be replaced by silicone-acrylic emulsion or pure acrylic emulsion. They should be well stirred and uniformly mixed when used, and stored in an environment of 5 to 35 ℃ for not more than 6 months.
The medium-ash cement toner is only used for concrete with the strength grade above C, aims to prevent visual color difference between high-grade filling materials and original concrete, and is not related to the filling materials in any physical and chemical properties.
The water is drinking tap water. Other water sources such as river water, underground water, rainwater and the like cannot be used.
In addition to water and toner, the filler formed by mixing the other component materials through respective complementary advantages has good complementary effects of crack resistance, shrinkage resistance, water resistance, alkali resistance, corrosion resistance, freeze-thaw resistance and high temperature resistance; the integral filler has the characteristics of high strength, strong bonding energy and no cracking, and the product is nontoxic, tasteless and safe.
Firstly, according to the aperture of the screw, the diameter of the screw is taken as the judgment basis for determining the size of the screw, and the number of the filled screws and the amount of labor force are determined to determine the preparation number.
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental methods in the following examples, which are not specified under specific conditions, are generally performed under conventional conditions.
The following examples provide different compositions and proportions of screw hole fillers for radiation-proof concrete of different strengths.
Example 1 screw hole filler for radiation protective concrete with strength grade C30:
the screw hole filler comprises the following components in percentage by weight:
p.42.5 Portland Cement: 1-grade fly ash: quartz sand: silicon dioxide powder: metakaolin: magnesium oxide: 4000g of water: 500 g: 1200 g: 250 g: 250 g: 400 g: 1800 g;
the preparation method of the screw hole filling material comprises the following steps:
(1) before burdening, a brush or a sprinkling can is used for wetting the screw holes with proper water;
(2) weighing the above components;
(3) mixing the weighed components, and uniformly stirring;
(4) placing the obtained filler into the screw hole by the small scraper knife until the surface is dense; the filled screw holes are uniformly sprayed with water after 6 hours until the screw holes are maintained, and the water is sprayed for maintenance once at intervals of 3 hours.
Example 2 screw hole filler for radiation protective concrete with strength grade C35:
the screw hole filler comprises the following components in percentage by weight:
p.42.5 Portland Cement: l-grade fly ash: quartz sand: silicon dioxide powder: metakaolin: magnesium oxide: 4300g of water: 450 g: 1200 g: 250 g: 250 g: 350 g: 1850 g;
the preparation method of the screw hole filling material comprises the following steps:
(1) before burdening, a brush or a sprinkling can is used for wetting the screw holes with proper water;
(2) weighing the above components;
(3) mixing the weighed components, and uniformly stirring;
(4) placing the obtained filler into the screw hole by the small scraper knife until the surface is dense; the filled screw holes are uniformly sprayed with water after 6 hours until the screw holes are maintained, and the water is sprayed for maintenance once at intervals of 3 hours.
Example 3 screw hole filler for radiation protective concrete with strength grade C40:
the screw hole filler comprises the following components in percentage by weight:
p.42.5 Portland Cement: l-grade fly ash: quartz sand: silicon dioxide powder: acrylic emulsion: and (3) medium-ash cement blending: water 4500 g: 400 g: 1150 g: 200 g: 300 g: 15 g: 1900 g;
the preparation method of the screw hole filling material comprises the following steps:
(1) before burdening, a brush or a sprinkling can is used for wetting the screw holes with proper water; weighing the above components;
(2) mixing a part of the weighed water with the acrylic emulsion, and uniformly stirring for later use; mixing the other part of water with the lime cement blending agent, and uniformly stirring for later use;
(3) mixing and uniformly stirring the weighed p.42.5 ordinary portland cement, fly ash, quartz sand and silicon dioxide powder for later use;
(4) uniformly mixing the mixture obtained in the step (2) and the mixture obtained in the step (3);
(5) and (4) placing the filler obtained in the step (4) into the screw hole by using a small shovel cutter until the surface is dense.
(6) The filled screw holes are uniformly sprayed with water after 6 hours until the screw holes are maintained, and the water is sprayed for maintenance once at intervals of 3 hours.
Example 4 screw hole filler for radiation-proof concrete with strength grade C45-C60:
the screw hole filler comprises the following components in percentage by weight:
p.42.5 Portland Cement: 1-grade fly ash: quartz sand: silicon dioxide powder: acrylic emulsion: medium ash cement toner: water 4500 g: 300 g: 1000 g: 300 g: 300 g: 15 g: 1900 g;
the preparation method of the screw hole filling material comprises the following steps:
(1) before burdening, a brush or a sprinkling can is used for wetting the screw holes with proper water; weighing the above components;
(2) mixing a part of the weighed water with the acrylic emulsion, and uniformly stirring for later use; mixing the other part of water with the lime cement blending agent, and uniformly stirring for later use;
(3) mixing and uniformly stirring the weighed p.42.5 ordinary portland cement, fly ash, quartz sand and silicon dioxide powder for later use;
(4) uniformly mixing the mixture obtained in the step (2) and the mixture obtained in the step (3);
(5) and (4) placing the filler obtained in the step (4) into the screw hole by using a small shovel cutter until the surface is dense.
(6) The filled screw holes are uniformly sprayed with water after 6 hours until the screw holes are maintained, and the water is sprayed for maintenance once at intervals of 3 hours.
In the above embodiment, the diameters of the quartz sand grains were all 5 MM. The fineness of the silicon dioxide powder is not less than 1000 meshes. The fineness of metakaolin is not less than 1000 meshes. Other materials, such as cement, fly ash, magnesium oxide and the like, are required to meet the national standard and the common inspection and detection standard. The water was standard tap water. The medium-ash cement toner mainly adjusts the color difference between the screw hole filler and the original wall, and concrete with the strength grade of C30 and C35 does not need to be adjusted. The medium ash cement toner is fully dissolved in water and then mixed with the stirred fillers of other components.
The screw hole filling material prepared by the above embodiment is suitable for screw holes with multiple diameters, such as screws of 14MM, 16MM and 18MM, which respectively consume about 30g, 45g and 50g of the screw hole filling material.
The construction operation process requirements of the screw hole filling material are the same as those of ordinary concrete screw hole plugging.
After the screw hole filling material is used for plugging, no visible shrinkage trace exists after final setting, the screw hole filling material is firmly bonded with the original concrete, and the 28-day standard curing strength value of each component filling material is higher than the original structural strength.
Comparative example
(1) If the dosage of the p.42.5 Portland cement in the screw hole filling material exceeds 20 percent of the proportioning range of the cement in the screw hole filling material, the hydration heat temperature can be increased by 2 to 3 degrees, and the microcrack can be caused.
(2) In the screw hole filler, if the mixing amount of the fly ash exceeds 15 percent, the strength of the filler can be reduced by 3 to 4 percent, and simultaneously the workability of the filler is reduced and the bonding capability is reduced by 7 to 7.5 percent.
(3) In the screw hole filling material of the present invention, if the mixing amount of the quartz sand is too high, the possibility of increasing pores, and reducing the bonding capability and the workability can be generated.
(4) In the screw hole filler, if the metakaolin content is more than 15 percent, the overall 28-day strength is in a reduced state, and meanwhile, the cohesiveness of the filler is increased, so that the setting time is shortened, and manual operation is not facilitated.
(5) In the screw hole filler, if the content of the magnesium high-performance anti-cracking agent exceeds the weight percentage of the magnesium high-performance anti-cracking agent required to be protected by the invention and exceeds 2 percent or more, the water demand of the screw hole filler can be increased, the hydration temperature rise is increased, and the discreteness of the filler is increased.
The above description is for the purpose of describing the invention in more detail with reference to specific preferred embodiments, and it should not be construed that the embodiments are limited to those described herein, but rather that the invention is susceptible to various modifications and alternative forms without departing from the spirit and scope of the present invention.
Claims (10)
1. A screw hole filler, characterized in that the screw hole filler comprises ordinary portland cement, fly ash, quartz sand, silica powder, optionally a middle ash cement admixture and water, and a component (a) metakaolin and magnesium oxide or a component (b) emulsion; wherein the content of the first and second substances,
the ordinary portland cement is p.42.5 ordinary portland cement or p.52.5 ordinary portland cement;
the fly ash is F class 1 or F class 2 fly ash;
the emulsion is acrylic emulsion, silicone-acrylic emulsion or pure acrylic emulsion.
2. The screw hole filler according to claim 1, wherein said screw hole filler comprises portland cement, fly ash, quartz sand, silica powder, metakaolin, magnesium oxide, and water;
based on the total weight of the filler,
3. the screw hole filler according to claim 1, wherein said screw hole filler comprises portland cement, fly ash, quartz sand, silica powder, latex, medium cement admixture, and water;
based on the total weight of the filler,
4. the screw hole filler according to claim 1, wherein the mesh number of said quartz sand is controlled within 18 to 20 mesh.
5. The screw hole filler according to claim 1, wherein said metakaolin is controlled to a mesh size within the range of 800 to 1500 mesh.
6. The screw hole filler according to claim 1, wherein the mesh number of said silica powder is controlled within the range of 800 to 1000 mesh.
7. The screw hole filler according to claim 1, wherein said screw hole filler is used to fill screw holes having a diameter of 14MM, 16MM or 18 MM.
8. The screw hole filler according to claim 1, wherein said screw hole filler is used for radiation-proof concrete having a strength rating of C30-C60.
9. The method of making a screw hole filler as defined in claim 1,
the screw hole filling material comprises ordinary portland cement, fly ash, quartz sand, silicon dioxide powder, metakaolin, magnesium oxide and water; the method comprises the following steps:
(1) before burdening, moistening the screw holes with water; weighing the above components;
(2) mixing and stirring the weighed components uniformly;
(3) placing the obtained filler into the screw hole by the small scraper knife until the surface is dense; the filled screw holes are uniformly sprayed with water after 6 hours until the screw holes are maintained, and the water is sprayed for maintenance once at intervals of 3 hours.
10. The method of making a screw hole filler as defined in claim 1,
the screw hole filling material comprises ordinary portland cement, fly ash, quartz sand, silicon dioxide powder, emulsion, a middle ash cement regulator and water; the method comprises the following steps:
(1) before burdening, moistening the screw holes with water; weighing the above components;
(2) mixing and uniformly stirring a part of the weighed water and the acrylic emulsion for later use; mixing the other part of the weighed water with the lime cement blending agent uniformly for later use;
(3) mixing and uniformly stirring the weighed p.42.5 ordinary portland cement, fly ash, quartz sand and silicon dioxide powder for later use;
(4) uniformly mixing the mixture obtained in the step (2) and the mixture obtained in the step (3);
(5) placing the filler obtained in the step (4) into the screw hole by a small shovel cutter until the surface is dense; the filled screw holes are uniformly sprayed with water after 6 hours until the screw holes are maintained, and the water is sprayed for maintenance once at intervals of 3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811502893.4A CN111285645A (en) | 2018-12-10 | 2018-12-10 | Anti-radiation concrete screw hole plugging filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811502893.4A CN111285645A (en) | 2018-12-10 | 2018-12-10 | Anti-radiation concrete screw hole plugging filler |
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| CN111285645A true CN111285645A (en) | 2020-06-16 |
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| CN201811502893.4A Pending CN111285645A (en) | 2018-12-10 | 2018-12-10 | Anti-radiation concrete screw hole plugging filler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114591100A (en) * | 2022-02-28 | 2022-06-07 | 中冶南方城市建设工程技术有限公司 | Polymer mortar for plugging screw hole penetrating through outer wall and construction method |
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| KR101832164B1 (en) * | 2017-09-06 | 2018-02-27 | 리플래시기술 주식회사 | Self-healing eco-friendly cement mortar composition for repairing structure and repairing method of structure therewith |
| CN108689666A (en) * | 2018-08-22 | 2018-10-23 | 重庆绿恒环保科技有限公司 | A kind of mortar for clogging perfusion |
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| CN104496354A (en) * | 2014-12-15 | 2015-04-08 | 福建省镁金来环保建筑科技有限公司 | Cement-based grouting material and preparation method thereof |
| CN106087926A (en) * | 2016-06-03 | 2016-11-09 | 河海大学 | Ocean platform steel pipe GFRP pipe concrete mixing spud leg |
| CN107044169A (en) * | 2017-03-17 | 2017-08-15 | 中交航局第工程有限公司 | A kind of method in quick blocking Screw arbor with nut at both-ends hole |
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Application publication date: 20200616 |