CN109095859B - Self-healing anti-cracking waterproof root-resistant concrete - Google Patents
Self-healing anti-cracking waterproof root-resistant concrete Download PDFInfo
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- CN109095859B CN109095859B CN201811070407.6A CN201811070407A CN109095859B CN 109095859 B CN109095859 B CN 109095859B CN 201811070407 A CN201811070407 A CN 201811070407A CN 109095859 B CN109095859 B CN 109095859B
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides self-healing anti-cracking waterproof root-resistant concrete which is prepared from the following raw materials in parts by mass: 300 parts of cement, 750 parts of sand, 850 parts of gravel, 1000 parts of 1100 parts of sand, 2-5 parts of a water reducing agent, 10-30 parts of fiber, 15-35 parts of an expanding agent, 1-5 parts of water-absorbing resin, 40-60 parts of copper slag and 10-20 parts of zinc slag. The self-healing anti-cracking waterproof root-resistant concrete is obtained by uniformly mixing the raw materials in proportion. The self-healing anti-cracking waterproof root-resistant concrete provided by the invention has good waterproof and root-resistant effects when being applied to green planted roofs, and has a self-healing microcrack function. The preparation method is simple, low in preparation cost and wide in application value.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to self-healing anti-cracking waterproof root-resistant concrete.
Background
The green roof is a building roof (including a roof, a balcony and the like) or an underground building roof paved with planting soil for planting plants. The novel building heat-insulation roof structure has the advantages of not occupying land resources, increasing urban greening area, improving air quality, beautifying urban landscape, reducing PM2.5 pollution degree, relieving urban heat island effect, keeping warm in winter and insulating heat in summer, reducing temperature fluctuation range borne by the roof, prolonging the service life of the roof, reducing energy consumption of indoor air conditioners and the like, becomes a new direction of modern building development, and arouses the attention of numerous researchers at home and abroad.
The biggest problem of the planted roof in China is the root penetration resistance problem, and the adopted root penetration resistance materials are all organic flexible components which are waterproof and root resistant, but the organic components are easy to volatilize and age after long-term service. The service life of the building can not be as long as that of the building, and the later maintenance cost is high. Therefore, the development of the rigid root-resistant waterproof material for the green planting roof is of great significance.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a concrete for planting roof, which has the advantages of self-healing, crack resistance, water resistance, root resistance, same service life as a building, and low cost.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the self-healing anti-cracking waterproof root-resistant concrete is prepared from the following raw materials in parts by weight: 300 parts of cement, 750 parts of sand, 850 parts of gravel, 1100 parts of gravel, 2-5 parts of water reducing agent, 10-30 parts of fiber, 15-35 parts of expanding agent, 1-5 parts of water-absorbing resin, 40-60 parts of copper slag, 10-20 parts of zinc slag and 170 parts of water.
According to the scheme, the cement is general portland cement.
According to the scheme, the sand is middle zone sand, and the broken stone is fine stone with the thickness of 5-16 mm.
According to the scheme, the water reducing agent is at least one of a polycarboxylic acid water reducing agent, an aliphatic water reducing agent, a naphthalene water reducing agent and a melamine water reducing agent.
According to the scheme, the fiber is at least one of steel fiber, aramid fiber, polypropylene fiber, glass fiber, basalt fiber and carbon fiber.
According to the scheme, the expanding agent is a mixture of azodicarbonamide and magnesium oxide, and the mixing mass ratio is 1: 5.
According to the scheme, the water-absorbent resin is superfine high-molecular water-absorbent resin (250 meshes).
According to the scheme, the copper slag is industrial waste slag generated in the copper smelting process, the copper content is not lower than 0.5wt%, and the average particle size is less than 10 mu m; the zinc slag is waste slag of smelting zinc, the average grain size is less than 10 mu m, and the zinc content is 0.5wt% -1 wt%.
In order to solve the problems in the prior art, the inventor carries out functional improvement on the existing concrete, and the functional improvement comprises the following steps:
the fiber is added into the components, micro cracks are easily generated in the concrete under the action of stress, the fiber can increase the energy consumed by the cracks by increasing the growth detouring degree of the cracks, so that the cracks are reduced, the waterproof performance of the concrete can be improved in a green planting roof, and the blocking force in the process of plant root system puncture is increased.
The components are added with the expanding agent, so that the generation of cracks can be inhibited at the beginning of the hydration, setting and hardening of the concrete and after the concrete is hardened. Among them, azodicarbonamide has an effect of suppressing generation of cracks due to volume shrinkage at the beginning of curing of concrete, and a magnesium oxide expanding agent has an effect of compensating for volume shrinkage after curing of concrete. Therefore, the additive added in the invention can play a role in inhibiting the generation of cracks in the service period of concrete.
The water-absorbent resin is added into the components, and on one hand, the superfine high-molecular water-absorbent resin can continuously provide a hydration environment after the concrete is hardened, so that the hardened slurry is continuously compact, and meanwhile, the generated micro-cracks can continuously provide hydration products through the reaction of water provided by the water-absorbent resin with cement, copper slag and zinc slag, so that the self-healing effect is achieved; in addition, the selected superfine water-absorbing resin avoids the defects of high porosity of hardened slurry and weakened mechanical property caused by overlarge traditional water-absorbing resin.
Copper slag and zinc slag are added into the components, and the industrial solid waste contains root-resistant components, wherein the combined action of copper and zinc has a good effect of resisting root and puncture; in addition, active components in the copper slag and the zinc slag can react with calcium hydroxide which is a cement hydration product to generate calcium silicate hydrate and calcium aluminate hydrate, so that the density of hardened slurry is improved. Not only has the effect of physical root resistance, but also has the effect of chemical root resistance.
The invention has the beneficial effects that:
1. the concrete adopts the optimized design of the mixing ratio of the multielement modified components, has the effects of water resistance and crack resistance, has the effect of self-healing under the condition of crack generation, and simultaneously has the effect of physical root resistance due to the doping of fibers.
2. The doped industrial solid waste can be consumed, copper and zinc in the industrial solid waste have the effect of chemical root resistance, and in addition, the components in the copper slag and the zinc slag can obviously improve the compactness of concrete through the volcanic ash reaction, so that the effect of physical root resistance is effectively improved.
Detailed Description
The invention will be further described with reference to specific examples to assist a better understanding of the invention, but the scope of the invention is not limited to these examples.
Examples 1 to 5
300 parts of cement sand 250-containing material, 850 parts of sand 750-containing material, 1100 parts of gravel 1000-containing material, 2-5 parts of water reducing agent, 10-30 parts of fiber, 15-35 parts of expanding agent, 1-5 parts of water-absorbing resin, 40-60 parts of copper slag and 10-20 parts of zinc slag are mixed with 170 parts of water uniformly to obtain cement mortar, and the raw materials and the mass ratio used in each embodiment are shown in Table 1.
TABLE 1
Detecting the shrinkage rate of the concrete according to the national standard GB/T29417-;
the concrete impermeability coefficient is determined according to the regulations of the national standard GB/T50082 Standard test method for the Long-term Performance and durability of ordinary concrete;
carrying out 28d compression strength test according to the national standard GBT17671-1999 cement mortar strength test method
The basic properties of the common concrete prepared from the components are as follows: see table 2.
TABLE 2
In conclusion, the root-blocking waterproof concrete can effectively prevent the plant root system from puncturing, does not seep water or crack, and has a theoretical service life close to that of concrete of a roof structure. And the green roof structure using the material has simple design process and short construction period, saves the cost from construction to later maintenance, and has wide market prospect.
Claims (5)
1. The self-healing anti-cracking waterproof root-resistant concrete is characterized by being prepared from the following raw materials in parts by weight: 300 parts of cement, 750 parts of sand, 850 parts of gravel, 1000 parts of sand, 1100 parts of water reducing agent, 2-5 parts of fiber, 10-30 parts of expanding agent, 1-5 parts of water-absorbing resin, 40-60 parts of copper slag, 10-20 parts of zinc slag and 170 parts of water;
the water-absorbing resin is superfine high-molecular water-absorbing resin with the diameter of more than 250 meshes, and the expanding agent is a mixture of azodicarbonamide and magnesium oxide, and the mixing mass ratio is 1:5;
the copper slag is industrial waste slag generated in the copper smelting process, the copper content is not lower than 0.5wt%, and the average grain diameter is less than 10 mu m; the zinc slag is waste slag of smelting zinc, the average grain size is less than 10 mu m, and the zinc content is 0.5wt% -1 wt%.
2. The self-healing anti-cracking waterproof root-resistant concrete according to claim 1, wherein: the cement is general portland cement.
3. The self-healing anti-cracking waterproof root-resistant concrete according to claim 1, wherein: the sand is middle zone sand, and the broken stone is fine stone with the thickness of 5-16 mm.
4. The self-healing anti-cracking waterproof root-resistant concrete according to claim 1, wherein: the water reducing agent is at least one of a polycarboxylic acid water reducing agent, an aliphatic water reducing agent, a naphthalene water reducing agent and a melamine water reducing agent.
5. The self-healing anti-cracking waterproof root-resistant concrete according to claim 1, wherein: the fiber is at least one of steel fiber, aramid fiber, polypropylene fiber, glass fiber, basalt fiber and carbon fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811070407.6A CN109095859B (en) | 2018-09-13 | 2018-09-13 | Self-healing anti-cracking waterproof root-resistant concrete |
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| CN201811070407.6A CN109095859B (en) | 2018-09-13 | 2018-09-13 | Self-healing anti-cracking waterproof root-resistant concrete |
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| Publication Number | Publication Date |
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| CN109095859A CN109095859A (en) | 2018-12-28 |
| CN109095859B true CN109095859B (en) | 2021-03-09 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836081B (en) * | 2018-12-29 | 2021-08-24 | 苏州科技大学 | Waterproof anti-crack reinforced concrete |
| CA3077068C (en) * | 2019-04-04 | 2023-09-26 | Richard Bueble | Method for the production of portland cement composition with low embodied energy and carbon for abrasion resistant concrete and mortar |
| CN110510932A (en) * | 2019-09-12 | 2019-11-29 | 深圳市奇信集团股份有限公司 | A kind of self-healing polymer cement waterproof paint and preparation method thereof |
| CN110698153B (en) * | 2019-09-25 | 2022-04-12 | 北京城市之光生态环境有限公司 | Pavement crack-resistant concrete and application thereof in garden construction |
| CN112499996A (en) * | 2020-12-02 | 2021-03-16 | 中建西部建设新疆有限公司 | Preparation method of shrinkage-reducing copper slag concrete |
| CN112939510B (en) * | 2021-01-29 | 2022-02-25 | 湖北工业大学 | Preparation method of anti-crack, self-healing and root-blocking functional additive for concrete |
| CN112939550A (en) * | 2021-04-13 | 2021-06-11 | 山东科技大学 | High-ductility cement-based composite material |
| CN113387652A (en) * | 2021-06-30 | 2021-09-14 | 西安建祥建材科技有限公司 | Anti-cracking anti-seepage self-repairing C35 mass concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100976427B1 (en) * | 2009-08-07 | 2010-08-17 | 박진성 | Waterproof and root barrier combined stuff for greenroof on the building |
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| CN102817445B (en) * | 2012-08-29 | 2014-11-19 | 华太建设集团有限公司 | Self-repairing anti-root-penetrating concrete waterproof structure and construction method thereof |
| CN105418008B (en) * | 2015-12-15 | 2017-08-29 | 湖北工业大学 | A kind of root resistance water-proof concrete and green roof structure |
| CN106830856A (en) * | 2017-02-13 | 2017-06-13 | 武汉源锦建材科技有限公司 | A kind of ungauged regions reinforcing bar sleeve for connection grouting material and preparation method thereof |
| CN107473647A (en) * | 2017-09-29 | 2017-12-15 | 成都新柯力化工科技有限公司 | A kind of ecological foam concrete for roof plant cultivation and preparation method thereof |
| CN107628792A (en) * | 2017-10-23 | 2018-01-26 | 盐城工学院 | A kind of nickel slag concrete for plant growth slop protection material and preparation method thereof |
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| KR100976427B1 (en) * | 2009-08-07 | 2010-08-17 | 박진성 | Waterproof and root barrier combined stuff for greenroof on the building |
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