CN114541330A - Preparation and construction method of Roller Compacted Concrete (RCC) surface auxiliary anti-seepage coating - Google Patents
Preparation and construction method of Roller Compacted Concrete (RCC) surface auxiliary anti-seepage coating Download PDFInfo
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- CN114541330A CN114541330A CN202111543442.7A CN202111543442A CN114541330A CN 114541330 A CN114541330 A CN 114541330A CN 202111543442 A CN202111543442 A CN 202111543442A CN 114541330 A CN114541330 A CN 114541330A
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
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- 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
Abstract
The invention discloses a preparation and construction method of Roller Compacted Concrete (RCC) surface auxiliary anti-seepage coating, wherein the coating comprises the following components in parts by mass: 1.5 of a component A and a component B; the construction method comprises the steps of base layer treatment, ingredient mixing and coating. Compared with the prior art, the invention has the advantages that: the anti-seepage effect of the coating is excellent; the compatibility and matching degree with the concrete surface are good; the coating has a certain breathing function, and is breathable and waterproof; has outstanding economical efficiency; can adapt to a certain degree of concrete deformation; the coating has good concrete carbonization resistance and chloride ion corrosion resistance; no toxicity exists during and after construction; the wet base surface has good adhesion; the coating can adapt to long-term underwater environment without being damaged or destroyed.
Description
Technical Field
The invention relates to civil engineering, in particular to a preparation and construction method of Roller Compacted Concrete (RCC) surface auxiliary anti-seepage coating.
Background
For the present time, roller compacted concrete surface impermeability is generally adopted: 1) abnormal concrete seepage prevention and secondary-composition normal concrete seepage prevention; 2) and (5) preventing seepage of the coating. Whether the abnormal concrete or the secondary-composition normal concrete is impermeable, because the construction and the material are brittle materials, the crack is easily caused by the influence of various environmental factors during the construction and maintenance period, and the crack and leakage phenomena are caused on the roller compacted concrete dam surface.
The RCC coating barrier is currently mainly: polymer cement barrier coating systems, cement-based capillary crystalline waterproofing coating systems, and polyurea barrier coating systems.
Disclosure of Invention
The technical problem to be solved by the invention is that the polyurea coating has the following three objective defects: 1) the polyurea coating has undoubted material performance, but the polyurea material has strict and harsh requirements on RCC surface base layer treatment and works in the air, the difficulty of base layer treatment is very high, and if the treatment is not in place, the bonding problem is easy to occur, so that the coating is easy to void, and the integral seepage resistance is influenced; 2) the concrete hydration heat temperature rise of the roller compacted concrete dam is long in duration, the polyurea coating is a closed organic coating, and the coating generates reverse steam pressure due to internal pressure generated in the concrete hydration process, so that the bonding between the coating and the concrete surface is damaged; 3) the manufacturing cost of the polyurea coating is high, which is generally 1.5 to 3 times of that of the polymer cement impermeable coating, and the economic benefit is relatively poor. The cement-based permeable crystallization type waterproof coating also belongs to a rigid material due to the material characteristics, and has certain limitation when being used for RCC surface seepage prevention.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a preparation and construction method of Roller Compacted Concrete (RCC) surface auxiliary anti-seepage coating comprises the following steps: 1.5 of A component and B component:
the A component (by weight 1000) comprises: 380-420 parts of 42.5 ordinary portland cement; 90-110 parts of first-stage or second-stage fly ash; silica sand (40/70 mesh) 50; dry sand powder (100 mesh) 360; dry sand (300 mesh) 90; core additive (JSJ0101) 1;
the component B (by weight 1000) comprises: 1. core emulsion (BBRY0102) 800; softened water 193; core additive (XPJ0103) 4; core additive (JNJ0104) 2; core additive (FFJ0105) 1;
the construction method comprises the following steps:
s1, performing base layer processing;
s2, blending ingredients, wherein the SD12 coating is 1: 1.5, mixing the component A and the component B, pouring the component A into a clean stirring container, slowly adding the component B into the container according to a specified proportion while stirring, controlling the stirring time to be 3-5 minutes by using an electric impact stirrer (the rotating speed is 400-500 revolutions per minute), uniformly stirring the stirred material slurry without powder agglomerates, and standing for 3 minutes for later use;
and S3, coating and brushing the coating.
Compared with the prior art, the invention has the advantages that: 1. the anti-seepage effect of the coating is excellent;
2. the compatibility and matching degree with the concrete surface are good, and the bonding strength of a wet base surface reaches 1.0 Mpa;
3. the coating has a certain breathing function, is air-permeable and waterproof, reduces the damage of reverse steam pressure generated by the temperature rise of concrete hydration heat, has better safety and reliability, and forms a tight-fitting and waterproof effect;
4. compared with polyurea coating, the coating has outstanding economical efficiency;
5. the polymer cement impermeable coating has good ductility and elasticity (120%), and can adapt to concrete deformation to a certain degree;
6. the coating has good concrete carbonization resistance and chloride ion erosion resistance, and can well protect the concrete from being influenced and damaged by adverse environment;
7. the SD12 coating belongs to a novel environment-friendly coating, and has no toxicity during and after construction;
8. the RCC surface may have a damp base surface, and the SD12 coating can be applied on the damp base surface and has good adhesion on the damp base surface;
9. after the reservoir stores water, the coating can adapt to a long-term underwater environment without being damaged or destroyed.
Further, mixing and stirring the raw materials of the component A in a horizontal dry powder stirrer for 3-5 minutes according to the weight, uniformly mixing, metering and packaging to finish the preparation of the component A.
And further, stirring and mixing the raw materials of the component B in a liquid container stirrer for 2 minutes according to the weight, and metering and packaging after stirring and mixing to finish the preparation of the component B.
Further, in the step of blending ingredients in S2, the method specifically includes:
1) polishing the RCC concrete surface by using an angle grinder to remove loose floating ash, a release agent and other various media influencing surface bonding;
2) repairing the defects of honeycombs, pitted surfaces, cavities and slab staggering on the surface of the RCC concrete by using polymer repairing mortar;
3) after the repairing material is solidified (generally, after 24 hours), the RCC concrete surface treated in the first two steps is cleaned by clear water.
Further, the coating brushing step of S3 specifically includes:
1) stirring the stirred slurry for about 2 minutes again, uniformly brushing the coating on the surface of the RCC concrete by using a wide-plate goat hair brush (four inches wide), and brushing the coating forcefully as much as possible during brushing so that the coating and a base layer are well extruded, a better bonding effect is ensured, and the brushing of the first layer is completed;
2) after the first layer of coating is dried and solidified, coating a second layer of coating, wherein the coating direction of the second layer of coating is crossed with the coating direction of the first layer of coating by 90 degrees, so that better coverage is formed;
3) after the second layer of coating is brushed for 24 hours, brushing a third layer of coating, wherein the brushing direction is crossed with the second layer by 90 degrees;
4) maintaining the coating, namely maintaining the coating by using a spraying method after the whole coating reaches the designed coating thickness of 2 mm and the surface of the coating is completely dried and solidified;
5) and (5) cleaning tools.
Drawings
FIG. 1 is a schematic diagram of a method for preparing and constructing a Roller Compacted Concrete (RCC) surface auxiliary barrier coating.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In the specific implementation of the invention, as shown in the embodiment shown in fig. 1, the coating comprises the following components in mass ratio of 1: 1.5 of A component and B component: the A component (by weight 1000) comprises: 380-420 parts of 42.5 ordinary portland cement; 90-110 parts of first-stage or second-stage fly ash; silica sand (40/70 mesh) 50; dry sand powder (100 mesh) 360; dry sand (300 mesh) 90; core additive (JSJ0101) 1; the component B (by weight 1000) comprises: 1. core emulsion (BBRY0102) 800; softened water 193; core additive (XPJ0103) 4; core additive (JNJ0104) 2; core additive (FFJ0105) 1;
the construction method comprises the following steps: s1, performing base layer processing; s2, blending ingredients, wherein the SD12 coating is 1: 1.5, mixing the component A and the component B, pouring the component A into a clean stirring container, slowly adding the component B into the container according to a specified proportion while stirring, controlling the stirring time to be 3-5 minutes by using an electric impact stirrer (the rotating speed is 400-500 revolutions per minute), uniformly stirring the stirred material slurry without powder agglomerates, and standing for 3 minutes for later use; and S3, coating and brushing the coating.
Further, in the embodiment shown in fig. 1, in the step of blending ingredients in S2, the step specifically includes: 1) polishing the RCC concrete surface by using an angle grinder to remove loose floating ash, a release agent and other various media influencing surface bonding; 2) repairing the defects of honeycombs, pitted surfaces, cavities and slab staggering on the surface of the RCC concrete by using polymer repairing mortar; 3) after the repairing material is solidified (generally, after 24 hours), the RCC concrete surface treated in the first two steps is cleaned by clear water.
Further, in the example shown in fig. 1, the raw materials of the component a are mixed and stirred in a horizontal dry powder stirrer according to the weight for 3 to 5 minutes, and the mixture is measured and packaged after being uniformly mixed, so that the preparation of the component a is completed. And (3) stirring and mixing the raw materials of the component B in a liquid container stirrer according to the weight for 2 minutes, and metering and packaging after stirring and mixing to finish the preparation of the component B.
Further, in the embodiment shown in fig. 1, the coating brushing step of S3 specifically includes:
1) stirring the stirred slurry for about 2 minutes again, uniformly brushing the coating on the surface of the RCC concrete by using a wide-plate goat hair brush (four inches wide), and brushing the coating forcefully as much as possible during brushing so that the coating and a base layer are well extruded, a better bonding effect is ensured, and the brushing of the first layer is completed; according to practical tests, the brushing thickness of the first layer of coating is about 0.5 mm;
2) after the first layer of coating is dried and solidified, coating a second layer of coating, wherein the coating direction of the second layer of coating is crossed with the coating direction of the first layer of coating by 90 degrees, so that better coverage is formed; the coating thickness was about 0.5 mm;
3) after the second layer of coating is brushed for 24 hours, brushing a third layer of coating, wherein the brushing direction is crossed with the second layer by 90 degrees; the interval time between the fourth layer and the third layer is also 24 hours;
4) maintaining the coating, namely maintaining the coating by using a spraying method after the whole coating reaches the designed coating thickness of 2 mm and the surface of the coating is completely dried and solidified; the curing time is not less than 48 hours;
5) cleaning tools; after each coating is coated, all the tools, the stirring equipment and the stirring container are immediately cleaned by clear water for the next use.
Through exploration and practical verification of several stages, the SD12 polymer cement waterproof coating developed up to now has relative advantages in the aspects of construction convenience, adaptability to dam materials, long-term safety and reliability of the coating, economy and the like, can be used as a first-choice auxiliary impermeable coating system for newly-built RCC dam concrete, and can be used for other types of built reservoir dams, such as: the leakage prevention and maintenance of normal concrete dams, rockfill face dams and the like provide more selectable references, and the method has good application scenes and benefits.
While there have been shown and described the fundamental principles and principal features of the invention and advantages thereof, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are given by way of illustration of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A preparation and construction method of Roller Compacted Concrete (RCC) surface auxiliary anti-seepage coating is characterized in that the coating comprises the following components in percentage by mass: 1.5 of A-component and B-component:
the A component (by weight 1000) comprises: 380-420 parts of 42.5 ordinary portland cement; 90-110 parts of first-stage or second-stage fly ash; silica sand (40/70 mesh) 50; dry sand (100 mesh) 360; dry sand (300 mesh) 90; core additive (JSJ0101) 1;
the component B (by weight 1000) comprises: 1. core emulsion (BBRY0102) 800; softened water 193; core additive (XPJ0103) 4; core additive (JNJ0104) 2; core additive (FFJ0105) 1;
the construction method comprises the following steps:
s1, performing base layer processing;
s2, blending ingredients, wherein the SD12 coating is 1: 1.5, mixing the component A and the component B, pouring the component A into a clean stirring container, slowly adding the component B into the container according to a specified proportion while stirring, controlling the stirring time to be 3-5 minutes by using an electric impact stirrer (the rotating speed is 400-500 revolutions per minute), uniformly stirring the stirred material slurry without powder agglomerates, and standing for 3 minutes for later use;
and S3, coating and brushing the coating.
2. A method of making and constructing a Roller Compacted Concrete (RCC) surface assisted barrier coating according to claim 1, wherein: and (3) mixing and stirring the raw materials of the component A in a horizontal dry powder stirrer according to the weight for 3-5 minutes, and metering and packaging after uniform mixing to finish the preparation of the component A.
3. A method of making and constructing a Roller Compacted Concrete (RCC) surface assisted barrier coating according to claim 1, wherein: and (3) stirring and mixing the raw materials of the component B in a liquid container stirrer for 2 minutes according to the weight, and metering and packaging after stirring and mixing to finish the preparation of the component B.
4. A method of preparing and constructing a Roller Compacted Concrete (RCC) surface assisted barrier coating according to claim 1, characterised in that: in the step of blending ingredients of S2, the method specifically includes:
1) polishing the RCC concrete surface by using an angle grinder to remove loose floating ash, a release agent and other various media influencing surface bonding;
2) repairing the defects of honeycombs, pitted surfaces, cavities and slab staggering on the surface of the RCC concrete by using polymer repairing mortar;
3) after the repairing material is solidified (generally, after 24 hours), the RCC concrete surface treated in the first two steps is cleaned by clear water.
5. A method of making and constructing a Roller Compacted Concrete (RCC) surface assisted barrier coating according to claim 1, wherein: the coating brushing step of S3 specifically includes:
1) stirring the stirred slurry for about 2 minutes again, uniformly brushing the coating on the surface of the RCC concrete by using a wide-plate goat hair brush (four inches wide), and brushing the coating forcefully as much as possible during brushing so that the coating and a base layer are well extruded, a better bonding effect is ensured, and the brushing of the first layer is completed;
2) after the first layer of coating is dried and solidified, coating a second layer of coating, wherein the coating direction of the second layer of coating is crossed with the coating direction of the first layer of coating by 90 degrees, so that better coverage is formed;
3) after the second layer of coating is brushed for 24 hours, brushing a third layer of coating, wherein the brushing direction is crossed with the second layer by 90 degrees;
4) maintaining the coating, namely maintaining the coating by using a spraying method after the whole coating reaches the designed coating thickness of 2 mm and the surface of the coating is completely dried and solidified;
5) and (5) cleaning tools.
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| CN202111543442.7A CN114541330A (en) | 2021-12-16 | 2021-12-16 | Preparation and construction method of Roller Compacted Concrete (RCC) surface auxiliary anti-seepage coating |
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| CN202111543442.7A CN114541330A (en) | 2021-12-16 | 2021-12-16 | Preparation and construction method of Roller Compacted Concrete (RCC) surface auxiliary anti-seepage coating |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105987A (en) * | 1985-09-04 | 1987-04-01 | 唐纳德·L·塞克斯顿 | Roller compacted concrete dam structure and build method |
| US4913583A (en) * | 1986-06-03 | 1990-04-03 | Didier Ledeuil | Method for waterproofing a roller compacted concrete of rubble |
| CN101070705A (en) * | 2007-03-13 | 2007-11-14 | 中南大学 | Concrete structure member of resisting salt-erosion broken and construction method |
| CN101070179A (en) * | 2007-05-24 | 2007-11-14 | 中国科学院青海盐湖研究所 | Method for preparing strontium chloride |
| CN111593704A (en) * | 2020-06-18 | 2020-08-28 | 中水东北勘测设计研究有限责任公司 | Anti-seepage structure of roller compacted concrete dam and construction method thereof |
| CN111877409A (en) * | 2020-08-17 | 2020-11-03 | 河南五建建设集团有限公司 | Construction method of cement-based capillary crystalline waterproof coating for underground engineering |
-
2021
- 2021-12-16 CN CN202111543442.7A patent/CN114541330A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105987A (en) * | 1985-09-04 | 1987-04-01 | 唐纳德·L·塞克斯顿 | Roller compacted concrete dam structure and build method |
| US4913583A (en) * | 1986-06-03 | 1990-04-03 | Didier Ledeuil | Method for waterproofing a roller compacted concrete of rubble |
| CN101070705A (en) * | 2007-03-13 | 2007-11-14 | 中南大学 | Concrete structure member of resisting salt-erosion broken and construction method |
| CN101070179A (en) * | 2007-05-24 | 2007-11-14 | 中国科学院青海盐湖研究所 | Method for preparing strontium chloride |
| CN111593704A (en) * | 2020-06-18 | 2020-08-28 | 中水东北勘测设计研究有限责任公司 | Anti-seepage structure of roller compacted concrete dam and construction method thereof |
| CN111877409A (en) * | 2020-08-17 | 2020-11-03 | 河南五建建设集团有限公司 | Construction method of cement-based capillary crystalline waterproof coating for underground engineering |
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