CN110698127B - Self-compacting rubber concrete canal lining and preparation method thereof - Google Patents
Self-compacting rubber concrete canal lining and preparation method thereof Download PDFInfo
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- CN110698127B CN110698127B CN201911012419.8A CN201911012419A CN110698127B CN 110698127 B CN110698127 B CN 110698127B CN 201911012419 A CN201911012419 A CN 201911012419A CN 110698127 B CN110698127 B CN 110698127B
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
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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
- 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
Abstract
The invention relates to a self-compacting rubber concrete canal lining and a preparation method thereof. The lining material provided by the invention can effectively improve the high brittleness and low strain performance of the conventional concrete lining, and effectively improve the ductility, impermeability, waterproofness, salt erosion resistance, freezing and thawing resistance and the capability of adapting to the deformation of the surrounding soil body of the lining structure. In addition, the lining material can be filled and compacted in the lining die without vibration in the cast-in-place process, so that the construction steps are simplified, and the construction progress is accelerated. The self-compacting rubber concrete channel lining provided by the invention has a good popularization and application prospect.
Description
Technical Field
The invention relates to canal lining of hydraulic engineering, in particular to a self-compacting rubber concrete canal lining and a preparation method thereof.
Background
In recent years, the country vigorously develops water-saving irrigation agriculture and implements cross-regional water transfer, in the flowing process of water, channel leakage can cause huge loss, and a channel lining is one of water-saving and seepage-proofing facilities in hydraulic engineering. In canal lining, concrete canal lining is widely applied to canal water delivery engineering due to the advantages of less investment, fast construction and the like. However, conventional concrete canal lining is often damaged by external and internal causes during use, most commonly frost heaving damage of the canal lining in northern areas and erosion damage of the canal in saline and alkaline areas. On the other hand, with the continuous development of economic society, the number of automobiles is increasing, and meanwhile, the treatment of a large amount of waste tires is a common problem in China and even all over the world.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a self-compacting rubber concrete canal lining and a preparation method thereof.
One of the objects of the present invention is to provide a self-compacting rubber concrete canal lining comprising a canal lining body made of self-compacting rubber concrete. The lining material provided by the invention can effectively improve the high brittleness and low strain performance of the conventional concrete lining, and effectively improve the ductility, impermeability, waterproofness, salt erosion resistance, freezing and thawing resistance and the capability of adapting to the deformation of the surrounding soil body of the lining structure.
According to some preferred embodiments of the present invention, the self-compacting rubber concrete is prepared from the following components: cement, fly ash, coarse aggregate, sand, rubber aggregate, water and additive in the mass ratio of (320-.
According to the invention, as the self-compacting rubber concrete is doped with a certain volume of rubber aggregate, the lining material has stronger ductility, impermeability, salt erosion resistance, freeze-thaw resistance and capability of adapting to the deformation of the surrounding soil body. In addition, the lining material has better fluidity and segregation resistance within a certain time after being mixed, and can be densely filled in the lining mould without vibration in the cast-in-place process, thereby simplifying the construction steps and accelerating the construction progress. The self-compacting rubber concrete channel lining provided by the invention has a good popularization and application prospect.
According to some preferred embodiments of the present invention, the additive comprises 95 to 105 parts by mass of water, 95 to 105 parts by mass of a water reducing agent, 0.1 to 0.2 parts by mass of an antifoaming agent, and 0.25 to 0.35 parts by mass of an air-entraining agent; preferably 100 parts by mass of water, 100 parts by mass of a water reducing agent, 0.16 part by mass of a defoaming agent and 0.3 part by mass of an air-entraining agent.
According to some preferred embodiments of the present invention, the sand is graded continuously, the fineness modulus is 2.4-2.8, and the sand ratio is not more than 46%.
According to some preferred embodiments of the present invention, the coarse aggregate has a particle size of 5 to 20 mm.
According to some preferred embodiments of the present invention, the rubber aggregate is processed from waste tires, and preferably, the rubber aggregate has a particle size of 0.075 to 4.75 mm.
According to some preferred embodiments of the present invention, the water reducing agent is a polycarboxylic acid type water reducing agent.
According to some preferred embodiments of the invention, the cement is selected from the group consisting of portland cement, preferably 42.5 portland cement; the fly ash is selected from I-grade fly ash.
According to some preferred embodiments of the present invention, the sealing device is a joint sealing, preferably a sealing rubber strip or a sealing plaster.
According to some preferred embodiments of the present invention, the slump of the self-compacting rubber concrete during the casting process is greater than 255mm, the slump expansion is 550-750mm, and the V-shaped funnel time is 7-30 s.
According to some preferred embodiments of the present invention, the cross-sectional shape of the canal lining can be any shape such as trapezoid, U-shape, arc, etc., and the thickness and the specific cross-sectional shape of the lining are selected according to practical applications. In a preferred embodiment of the present invention, the cross-sectional shape of the canal lining is trapezoidal, and the side wall of the canal lining is thin at the top and thick at the bottom.
According to some preferred embodiments of the present invention, the volume of the rubber aggregate in the self-compacting rubber concrete is not more than 30% of the volume of the sand. According to the invention, the self-compacting rubber concrete is produced by substituting equal volumes of rubber particles for sand, preferably not more than 30% by volume of sand.
According to some preferred embodiments of the present invention, the antifoaming agent may be selected from the group consisting of bamboo oil antifoaming agent AFK-2, anionic surfactant, mineral oil antifoaming agent, and polymeric polyether antifoaming agent; the air entraining agent can be selected from bamboo oil air entraining agent AE-200, anionic surfactant and amphoteric surfactant; the defoamer and the air-entraining agent can also be selected from other conventional classes, preferably AFK-2 and AE-200, respectively.
The invention also provides a preparation method of the self-compacting rubber concrete canal lining, which comprises the following steps:
step 1), fixing a template at a canal lining initial position, and sealing two sides of the template;
step 2), producing self-compacting rubber concrete, and pouring the self-compacting rubber concrete into the template;
step 3), humidifying and maintaining the self-compacting rubber concrete, and then removing the mold;
step 4), repeating the steps 1) to 3) until the preparation of the canal lining is finished;
preferably, in the step 4), a water stopping device is arranged between every two adjacent sections of self-compacting rubber concrete canal linings.
The invention has the beneficial effects that:
1. strong anti-permeability and anti-salt erosion capability. The canal lining material used by the invention uses rubber particles to partially replace sand, so that the self-compacting rubber concrete has stronger anti-permeability, waterproof and salt erosion resistance capabilities.
2. The construction is simple. The self-compacting rubber concrete has stronger fluidity and segregation resistance, can be compactly filled without manual vibration, and has simple and easy operation in the construction process.
3. The service life of the lining is prolonged. Compared with the conventional concrete lining, the self-compacting rubber concrete material used in the invention has stronger toughness, ductility, freeze-thaw resistance and capability of adapting to the deformation of the surrounding soil body, thereby prolonging the service life of the channel lining.
4. Is ecological and environment-friendly. The invention processes the waste tires into rubber aggregate to replace natural sand, thereby effectively reducing the pollution of the waste tires to the ecological environment caused by accumulation, landfill and incineration.
Drawings
FIG. 1 is a schematic cross-sectional view of a novel canal lining according to an embodiment of the present invention;
FIG. 2 is a schematic view of a novel canal lining water stop device in the embodiment of the invention;
reference numerals: 1. self-compacting rubber concrete; 2. the surrounding soil mass; 3. a water stopping device.
Detailed Description
The present invention will be further described with reference to the following examples and drawings, but the present invention should not be construed as being limited thereto. Modifications or substitutions to methods, procedures, or conditions of the invention may be made without departing from the spirit and scope of the invention.
Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials added in the examples are commercially conventional raw materials unless otherwise specified. In the following examples, cement is 42.5 Portland cement, fly ash is I-grade Henan Huifeng fly ash, the water reducing agent is a polycarboxylic acid type water reducing agent, the rubber aggregate is waste tire crushed particles with a continuous gradation of 0.075-0.45mm in particle size, the broken stone is natural broken stone with a continuous gradation of 5-20mm in particle size, the sand is natural sand with a continuous gradation of 0.075-0.45mm in particle size, the defoaming agent is a bamboo grease defoaming agent AFK-2, and the air entraining agent is a bamboo grease air entraining agent AE-200.
As shown in fig. 1 and 2, the self-compacting rubber concrete channel lining provided by the present invention comprises a channel lining body cast from self-compacting rubber concrete 1 on top of a surrounding soil body 2; and the water stopping device 3 is arranged between every two adjacent sections of self-compacting rubber concrete canal linings. In the embodiments provided by the present invention, the canal lining structure is preferably a trapezoidal cross section, with the lining sidewalls being thin on top and thick on the bottom.
Example 1
The preparation method of the self-compacting concrete canal lining structure comprises the following specific steps:
s1: fixing a template at the lining position of a canal, and sealing two sides of the template;
s2: producing self-compacting rubber concrete, and pouring the self-compacting rubber concrete with the flowing performance meeting the requirement into a template;
s3: after the pouring is finished, humidifying and maintaining the self-compacting rubber concrete, and removing the formwork after the self-compacting rubber concrete is maintained to a certain strength in the formwork;
s4: and repeating the steps S1-S3 until the construction of the whole section of canal lining is completed.
In this embodiment, a water-stop rubber strip is arranged between every two adjacent sections of self-compacting rubber concrete channel linings to reduce leakage loss of the channel.
In this embodiment, the self-compacting rubber concrete has the following raw material components in mass ratio: cement: fly ash: crushing stone: sand: rubber aggregate: water: the additive is 325:175:760:825:25:185: 7; in this example, the additive components included 100 parts by mass of water, 100 parts by mass of a water reducing agent, 0.16 parts by mass of an antifoaming agent, and 0.3 parts by mass of an air-entraining agent.
Example 2
The same method as in example 1 was used, except that the self-compacting rubber concrete had the following raw material components in mass ratio: cement: fly ash: crushing stone: sand: rubber aggregate: water: the additive is 325:175:760:780:50:185: 7; in this example, the additive components included 100 parts by mass of water, 100 parts by mass of a water reducing agent, 0.16 parts by mass of an antifoaming agent, and 0.3 parts by mass of an air-entraining agent.
Comparative example 1
The same procedure as in example 1 was conducted except that the rubber aggregate was replaced with sand in the same volume.
Experimental example 1
The self-compacting rubber concrete prepared in the above examples and comparative examples is subjected to a flow property test and a strength test according to the hydraulic concrete test procedure SL 352-2006, and the test results show that the implementation effects are as follows:
TABLE 1 flow Property test
TABLE 2 Strength test
As can be seen from the data in Table 1, in the embodiment of the invention, the slump of the self-compacting rubber concrete in the casting process is larger than 255mm, the slump expansion is 550-750mm, the V-shaped funnel time is 7-30s, no vibration is needed in the whole casting process, and the self-compacting rubber concrete fills and compacts the template under the action of the dead weight. From the data in table 2, it can be seen that, in the embodiment of the present invention, the elastic moduli of the self-compacting rubber concrete are 33.0GPa and 29.5GPa, respectively, and are reduced compared with the elastic modulus 34GPa of the comparative example, which indicates that the self-compacting rubber concrete has enhanced strain capacity and improved ductility, so as to improve the ability of the self-compacting rubber concrete canal lining structure to adapt to the deformation of the surrounding soil body to a certain extent.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A self-compacting rubber concrete canal lining is characterized by comprising a canal lining main body, wherein the canal lining main body is made of self-compacting rubber concrete; the self-compacting rubber concrete is prepared from the following components: cement, fly ash, coarse aggregate, sand, rubber aggregate, water and additive in a mass ratio of (320-) -330-) (170-) -180-) (755-) -765-) (600-) -870-) (25-155): 180-) -186- (6.0-7.5; the rubber aggregate is processed from waste tires, and the particle size of the rubber aggregate is 0.075-4.75 mm; the additive comprises 100 parts by mass of water, 100 parts by mass of a water reducing agent, 0.16 part by mass of a defoaming agent and 0.3 part by mass of an air entraining agent, the sand is continuously graded, the fineness modulus is 2.4-2.8, the sand rate is not more than 46%, the particle size of the coarse aggregate is 5-20mm, and the water reducing agent is a polycarboxylic acid type water reducing agent; the fly ash is selected from I-grade fly ash, and the cement is 42.5 ordinary portland cement.
2. The self-compacting rubber concrete canal lining of claim 1 further comprising a water stop means, said water stop means being joint water stops.
3. The self-compacting rubber concrete canal lining of claim 2 wherein the water stopping means is a water stopping rubber strip or a water stopping mastic.
4. A method of preparing a self-compacting rubber concrete canal lining according to any of claims 1 to 3, comprising the steps of:
step 1), fixing a template at a canal lining initial position, and sealing two sides of the template;
step 2), producing self-compacting rubber concrete, and pouring the self-compacting rubber concrete into the template;
step 3), humidifying and maintaining the self-compacting rubber concrete, and then removing the mold;
and 4), repeating the steps 1) to 3) until the preparation of the canal lining is finished.
5. The method for preparing the self-compacting rubber concrete canal lining, according to the claim 4), further comprises the step of arranging a water stopping device between every two adjacent segments of the self-compacting rubber concrete canal lining.
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| CN113929376B (en) * | 2020-06-29 | 2022-09-09 | 比亚迪股份有限公司 | Rubber concrete, preparation method thereof and bridge |
| CN112608122B (en) * | 2020-12-08 | 2022-08-19 | 广东省水利电力勘测设计研究院有限公司 | Micro-expansive epoxy emulsion modified self-compacting concrete for composite lining structure |
| CN112456922B (en) * | 2020-12-21 | 2022-02-18 | 中国农业大学 | Integral hydrophobic self-compacting rubber concrete and preparation method thereof |
| CN113443871A (en) * | 2021-06-18 | 2021-09-28 | 国网新源控股有限公司 | Concrete for filling gap between pressure steel pipe and underground surrounding rock |
| CN113705016B (en) * | 2021-09-06 | 2024-01-26 | 兰州理工大学 | Computing method for frost heaving resistance thickness change lining structure of cold region water delivery channel |
| CN114230276A (en) * | 2021-12-20 | 2022-03-25 | 沈月漫 | Fiber self-compacting rubber concrete and preparation method thereof |
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| US4278468A (en) * | 1979-09-10 | 1981-07-14 | United States Gypsum Company | Gypsum fire barrier for cable fires |
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| CN104761197A (en) * | 2015-03-25 | 2015-07-08 | 玉林市水利电力科学研究院 | Concrete used for canal lining and preparation method of concrete |
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| CN108751871A (en) * | 2018-07-26 | 2018-11-06 | 成都理工大学 | A kind of modified cement-based grouting material of waste Crumb rubber |
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