CN111763052A - Green ecological high-weather-resistance high-water-permeability pavement material and preparation method thereof - Google Patents
Green ecological high-weather-resistance high-water-permeability pavement material and preparation method thereof Download PDFInfo
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- CN111763052A CN111763052A CN201910259414.9A CN201910259414A CN111763052A CN 111763052 A CN111763052 A CN 111763052A CN 201910259414 A CN201910259414 A CN 201910259414A CN 111763052 A CN111763052 A CN 111763052A
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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
- C04B28/08—Slag cements
- C04B28/082—Steelmaking slags; Converter slags
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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
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- Road Paving Structures (AREA)
Abstract
The invention discloses a green ecological high-weatherability high-water-permeability pavement material and a preparation method thereof, wherein the water-permeable pavement material is prepared by crushing iron tailings and construction wastes into 3-5mm and 5-20mm, mixing rare earth inorganic mineral glue, active slag powder and water, and stirring for three to five minutes to pave a pavement to form a high-strength long-life ecological water-permeable pavement. In the pavement material, the proportion (mass ratio) of active slag powder, rare earth inorganic mineral glue, iron tailing slag (construction waste) coarse aggregate (with the particle size of 3-5mm) (or the particle size of 5-20mm) and water is 1: 0.37-0.63: 3.5-4: 0.02-0.1, the formed pavement material has the compressive strength of 30-48.5 MPa in 28 days, the breaking strength of 3-5 MPa, the water permeability coefficient of 3.8-4.5 mm/s, the mass loss rate after 25 times of freeze-thaw cycles is 0.4, and the compressive strength loss rate is 5.
Description
Technical Field
The invention relates to a novel permeable pavement material, in particular to a green ecological high-weather-resistance high-permeability pavement material and a preparation method thereof.
Background
In urban construction, a lot of cities adopt closed earth surfaces to improve traffic and road conditions and beautify the environment, and meanwhile, the urban ecological and climate environments are obviously adversely affected, rainwater cannot be drained by a drainage system in a low-lying road section and can only be drained by means of forced drainage or evaporation in sunny days, so that economic waste and an embarrassed situation of water accumulation in sunny days are caused, and a groundwater supply path is prevented by a watertight road surface.
The road surface is permeable, that is, the used road surface paving material has good water permeability, and the ground surface rainfall can completely or partially permeate into the ground through the special material. The urban ecosystem can be balanced in the road surface is permeated water, a certain part of rainwater can permeate into the underground through the permeable road surface, the problem of surface ponding can be solved without a drainage system when the rainfall is small, the pressure of the urban drainage system can be greatly relieved when the rainfall is large, the time for removing the surface rainwater can be greatly shortened, and for a few low-lying road sections, the rainwater can permeate into the underground gradually, and the surface does not form ponding any more. In addition, the permeable ground has more pores, has stronger adsorption force on dust, can reduce dust pollution and can reduce noise.
In China, water permeable pavement materials are gradually attracting attention, and research and application of the water permeable pavement materials are also gradually deepened and widely spread. In 2004, Beijing introduced 5 different types of urban rainfall flood control and utilization demonstration areas, and by adopting a method of paving permeable pavements, rainwater in buildings, courtyards and roads is collected for flushing toilets in families, greening of communities and recharging underground water; in 2005, roads in Shanghai New JiangBay are paved by adopting permeable pavements, and structural adjustment is carried out on the basis of a traditional cement pavement formula, so that the middle of the pavement material is loose, and rainwater can rapidly permeate into the earth surface through the pavement and be reduced into underground water; in the Shenyang Shibo garden at the end of 2005, stones used for paving water permeable pavements at main entrance squares, environment-friendly gardens and the like are mainly natural materials such as hsiuyen jade, white marble and the like, and water permeable materials are applied more and more in China, but are mostly applied to squares, courtyards and the like where inorganic motor vehicles pass.
Disclosure of Invention
Aiming at the problems that the compressive strength is not more than C30, the breaking strength is less than 6MPa, the weather resistance, the wear resistance and the water permeability are poor, the application in urban driving roads and expressways is difficult and the like in the existing permeable concrete production process, the invention provides a green ecological high-weather-resistance high-water permeability pavement material, which adopts an inorganic cementing material and a self-made composite inorganic additive, and can effectively solve the problems by using a permeable pavement material prepared from construction waste and urban solid waste, and simultaneously reduces the laying cost of the permeable pavement and the risk of underground water resource pollution.
The technical scheme of the invention is as follows:
a green ecological high-weatherability high-water-permeability pavement material is obtained by mixing rare earth inorganic mineral adhesive with construction waste or iron tailing slag crushed to a certain size, wherein the rare earth inorganic mineral adhesive is formed by mixing and stirring slag powder containing high-silicon aluminum, such as water quenching slag of a steel plant, red mud of an aluminum plant, fly ash of a power plant, nickel slag and the like, water glass, caustic soda, an alkali activator of soda ash and a self-made composite rare earth inorganic compound additive, and the raw materials comprise the following components in parts by weight:
slag powder: 100 portions of
Alkali activator: 53 portions of
Rare earth additive: 3.5-6 parts.
Further, the building garbage or the tailing slag is crushed into 3-10 mm stone, the weight ratio of the slag powder to the stone is 1: 3-3.5, and the density of concrete is 2100kg/m3And calculating to obtain the water-cement ratio of 0.02-0.10.
Further, the slag powder is one or more than two mixed powder of water-quenched slag of steel and iron works, red mud, fly ash and nickel slag, preferably a mixture of the water-quenched slag of steel and iron and the fly ash, and the mass percentages of the two are as follows: 20-100% of steel molten iron quenching slag and 0-80% of fly ash.
Further, the alkali activator is one or more than two of water glass, caustic soda and soda ash, preferably a mixture of the water glass and the caustic soda, the modulus is 1.0-2.0, and the mass ratio of the water glass to the caustic soda is 1: 0.1-0.3.
Further, the admixture is a water reducing agent and an enhancement retarder, the mass ratio of the water reducing agent to the retarder is 1-1.5: 1, wherein the water reducing agent is one or more than two of melamine, sodium lignosulfonate, naphthalene water reducing agent, fatty acid and polycarboxylic acid water reducing agent; the reinforcing retarder is a mixture of mixed rare earth salt, barium salt, boric acid or nitrate (or only represents the selection of two choices of boric acid and sodium nitrate salt) and phosphate, and the mass ratio of the four is preferably 0.01: 4: 3: 1-1.5.
The preparation method of the pavement material comprises the following steps:
(1) firstly, mixing rare earth salt, barium salt, boric acid (or nitrate) and phosphate in a mass ratio of 0.01: 4: 3: 1-1.5 into a solid substance stirring pot for stirring for 3-6 minutes to obtain an enhanced retarder, then adding a water reducing agent, wherein the weight ratio of the water reducing agent to the retarder is 1-1.5: 1, and mixing to obtain an additive;
(2) preparing an alkali activator, namely putting one or more than two of water glass, caustic soda and soda ash with a building modulus of 3.0-3.6 into a stirring tank for stirring, when the mixture is a mixture of the water glass and the caustic soda, the mass ratio of the water glass to the caustic soda is 1: 0.1-0.3, stirring for 6-10 minutes, controlling the modulus of the obtained solution to be 1.0-2.0, obtaining the alkali activator, and putting the alkali activator into a metering tank for later use;
(3) stirring and mixing the slag powder, the additive obtained in the step (1) and the alkali activator obtained in the step (2) according to 100 parts by weight of the slag powder, 53 parts by weight of the alkali activator and 3.5-4 parts by weight of the additive for 3-5 minutes to obtain a rare earth gel material;
(4) and (3) crushing building garbage or iron tailing slag into 3-10 mm stone serving as aggregate of the permeable pavement, mixing the rare earth inorganic mineral glue prepared in the steps (2) and (3) with the aggregate according to the mass ratio of 1: 3-3.5, stirring for 3-5 minutes, pouring the mixture out of a material bin, putting the mixture into an ABS plastic test block mold, flattening, and naturally curing to demolding to obtain the green ecological high-weather-resistance high-permeability pavement material.
Further, in the step (1), the stirring speed is 50-100 r/min.
Further, in the step (2), the stirring speed is 80-140 r/min.
Further, in the step (3), the stirring speed is 600-1000 r/min.
Performance testing
And (3) carrying out mechanical property test on the pavement material on the basis of corresponding age.
The pavement material of the invention has the following main characteristics: the pervious concrete pavement material has extremely high compression strength and breaking strength, can be used for collecting rainwater of buildings, courtyards and roads, is used for flushing toilets in families, greening communities and recharging underground water, reduces surface water into underground water, can be directly used for urban road pavement materials, plant roads, scenic spot roads and the like, and has wider application; meanwhile, as the main raw materials are all from the construction waste and the iron tailing slag, the urban solid waste recycling industry can be driven to develop towards the aspect of high added value. The key point is that the invention solves the technical defects that the prior popular permeable concrete preparation process adopts organic and polymer cementing materials with high price, poor weather resistance and pollution to water resources and atmosphere; particularly, the dry-process portland cement is not adopted in the cementing material, and natural curing is performed in the production process, so that the production is facilitated to the low-end production in the cement industry, the energy is saved, no dust and waste gas pollution is caused, and the replacement and upgrading of sponge urban construction products are greatly promoted.
The invention has the beneficial effects that:
(1) the pavement material has good bearing capacity, and the used materials are the building garbage and the slag completely, so the pavement material has wider application range and higher economic benefit. Through detecting the water permeability and the compressive strength of the material, the material is considered to have the water storage effect after being paved, the improvement of pavement drainage is facilitated, the material can be used as a new idea and strategy for improving the water immersion street phenomenon, and the compressive strength of the pavement can reach more than C40.
(2) The pavement material of the invention uses the construction waste and the tailing slag as the coarse stone, the gelled material can generate artificial stone structure phase change like garnet, analcite and natrolite in the gaps of the stones, has very high compressive strength and high wear resistance, and can be completely used for the pervious concrete pavement with high bearing capacity of urban driving roads and high-speed roads.
(3) The pavement material disclosed by the invention utilizes the alkali-activated slag powder as a cementing material to replace cement or organic polymer cementing materials, and has important practical significance for low-end capacity, upgrading and updating, environmental protection and energy conservation in the cement industry.
(4) The pavement material of the invention does not need the complex maintenance process of ordinary portland cement, and the process is simple, thereby saving investment and construction period.
(5) The pavement material of the invention only generates artificial stone structures such as garnet, analcite and natrolite between the contact interfaces of stones and stones, has very high bonding degree, and has very high water permeability which can reach 30 percent of water permeability because of fine gaps at the non-contact positions of the stones and the stones.
(6) The pavement material can be widely applied to projects and roads with water permeability requirements, such as expressways, urban driving roads, sidewalks, parks, parking lots, urban residential district roads and the like, and has great positive effects on relieving urban 'heat island effect', relieving urban waterlogging and improving and recovering urban ecological environment.
Drawings
The attached drawing of the specification is a product quality detection report prepared by the method
FIG. 1 is a cover of a test report on the compressive strength of a high-permeability concrete pavement material from Shandong research institute of traffic science.
FIG. 2 is a test report of the compressive strength of the high-permeability concrete pavement material from Shandong research institute of traffic science.
FIG. 3 is a performance test report of high-permeability concrete pavement materials from Beijing institute for testing building materials.
FIG. 4 is a high water permeability concrete pavement material detection report from the Shandong construction engineering quality supervision, inspection and test center.
Detailed Description
The following embodiments are intended to illustrate the present invention in some detail, but the present invention is not limited to the scope of the following description, and modifications and substitutions made by ordinary knowledge and ordinary means in the field of the present invention should be included within the scope of the present invention without departing from the above-described method and process idea of the present invention.
Example 1
(1) Firstly, putting the mixed rare earth salt, barium salt, boric acid and phosphate in a solid substance stirring pot according to the mol ratio of 0.01: 4: 3: 1.2, stirring at the speed of 60 revolutions per minute for 3-6 minutes to obtain a retarder, then adding a water reducing agent, controlling the weight ratio of the water reducing agent to the retarder to be 1: 1, and mixing to obtain an additive;
(2) taking a certain amount of water glass (modulus 3.0-3.2) and industrial caustic soda (the mass percentage of alkali is more than 96%), putting the water glass and the industrial caustic soda into a stirring tank according to the mass ratio of 1: 0.1, stirring the mixture for 6-10 minutes at the speed of 120 revolutions per minute, controlling the modulus of the obtained solution to be 1.0-2.0, obtaining an alkali activator, and putting the alkali activator into a metering tank for later use;
(3) stirring and mixing the slag powder steel plant water-quenched slag, the additive obtained in the step (1) and the alkali activator obtained in the step (2) according to 100 parts by weight of slag powder, 53 parts by weight of alkali activator and 3.5 parts by weight of additive, adding water according to the water-cement ratio of 18%, and stirring at the rotating speed of 800 per minute for 3-5 minutes to obtain a rare earth gel material;
(4) the construction waste or the tailing slag is crushed into 3-10 mm stone, then the rare earth gel material and the stone are mixed according to the mass ratio of 1: 3, the mixture is stirred for 3-5 minutes, then the mixture is poured out of a bin and placed into an ABS plastic test block mold, and the ABS plastic test block mold is pressed flat, and then the ABS plastic test block mold is naturally maintained until the ABS plastic test block mold is removed, so that the green ecological high-weather-resistance high-water-permeability pavement material is obtained.
The pavement material obtained in example 1 was subjected to mechanical property tests on the basis of corresponding age. The test results obtained were: the compressive strength is 14.1MPa on the first day; day 7, 18.7 MPa; 27.5MPa on day 28.
Example 2
(1) Firstly, putting the mixed rare earth salt, barium salt, boric acid and phosphate in a solid substance stirring pot according to the mol ratio of 0.01: 4: 3: 1.2, stirring at the speed of 60 revolutions per minute for 3-6 minutes to obtain a retarder, adding a water reducing agent, controlling the weight ratio of the water reducing agent to the retarder to be 1: 1, and mixing to obtain an additive;
(2) taking a certain amount of water glass (modulus 3.0-3.2) and industrial caustic soda (the mass percentage of alkali is more than 96%), putting the water glass and the industrial caustic soda into a stirring tank according to the mass ratio of 1: 0.1, stirring the mixture for 6-10 minutes at the speed of 120 revolutions per minute, controlling the modulus of the obtained solution to be 1.0-2.0, obtaining an alkali activator, and putting the alkali activator into a metering tank for later use;
(3) stirring and mixing slag powder (containing 20% of water-quenched slag and 80% of fly ash) with the additive obtained in the step (1) and the alkali activator obtained in the step (2) according to 100 parts by weight of the slag powder, 53 parts by weight of the alkali activator and 3.5 parts by weight of the additive, adding water in an amount of 15% of water-cement ratio, and stirring at 800 rpm for 3-5 minutes to obtain a rare earth gel material;
(4) the construction waste or the tailing slag is crushed into 3-10 mm stone, then the rare earth gel material and the stone are mixed according to the mass ratio of 1: 3.5, the mixture is stirred for 3-5 minutes, then the mixture is poured out of a bin and placed into an ABS plastic test block mold, the mixture is pressed flat, and then the pavement material is naturally maintained until the pavement material is demolded, so that the green ecological high-weather-resistance high-water-permeability pavement material is obtained.
The pavement material obtained in example 2 was subjected to mechanical property tests on the basis of corresponding age. The test results obtained were: the compressive strength is 19.1MPa in the first day; 25.6MPa on the third day; 47.8MPa on day 28.
Claims (5)
1. A green ecological pavement material with high weather resistance and high water permeability and a preparation method thereof are characterized in that: the permeable pavement material is aggregate formed by crushing building waste and iron tailing slag, so that the material is the most important ring of environmental-friendly circular economy, and the most important is that the high-permeability pavement material mainly comprises active slag powder, rare earth inorganic mineral glue, the building waste, the iron tailing slag and water, and the mass ratio of the components is 1: 0.37-0.6: 3.5-4.0: 0.015-0.1.
2. The green ecological high-weatherability high-permeability pavement material according to claim 1, characterized in that: the active slag powder is water-quenched slag of steel works, and the specific surface area is not less than 452m2Kg, density 2.8g/cm2The activity index is more than or equal to 95 percent, the modulus of the rare earth inorganic mineral adhesive is 1.2 to 2.0, and the grain diameter of the construction waste and the iron tailing slag is 3 to 5 mm.
3. The green ecological pavement material with high weather resistance and high water permeability as well as the preparation method thereof as claimed in claim 1, wherein the pavement material is characterized in that: the preparation method of the rare earth additive comprises the following steps: mixing rare earth salt, barium salt, boric acid (or nitrate) and phosphate in a mass ratio of 0.01: 4: 3: 1-1.5, putting the mixture into a solid substance stirring pot, stirring and mixing to obtain an enhanced retarder, adding a commercially available water reducing agent in a weight ratio of 1-1.5: 1, and mixing to obtain the admixture.
4. The green ecological high weather resistance high water permeability pavement material and the preparation method thereof according to claim 1, further characterized in that: the construction waste or iron tailing slag is crushed into 3-10 mm stone serving as aggregate of the permeable pavement, then active slag powder and the aggregate are mixed according to the mass ratio of 1: 3.5-4.0, after stirring for 3-5 minutes, rare earth inorganic mineral glue with the modulus of 1.2-2.0 is placed, the added amount is 40-60% (weight ratio) of the active slag powder, then the mixture is poured out of a material bin, placed in an ABS plastic test block module and flattened, and then natural curing is carried out until demolding is carried out, so that the green ecological high-weatherability high-permeability pavement material is obtained.
5. The green ecological high weather-resistant water-permeable pavement material according to claim 1, further characterized in that: the green ecological pavement material with high weather resistance and high water permeability has the compression strength of 30-50 MPa, the breaking strength of 3.5-7MPa, the water permeability coefficient of 3.9-5.0 mm/s and the freeze-thaw quality loss of 25 times less than 1.98%.
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| CN108609895A (en) * | 2018-05-02 | 2018-10-02 | 芜湖恒固混凝土材料有限公司 | A kind of preparation method of concrete compound retarder |
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2019
- 2019-04-02 CN CN201910259414.9A patent/CN111763052A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20130033778A (en) * | 2011-09-27 | 2013-04-04 | 한국철도기술연구원 | Concrete composition using the electric arc furnace oxidizing slag and second articles prepared with the same |
| CN102786320A (en) * | 2012-08-24 | 2012-11-21 | 华虹集团宜兴市华虹新型墙体建筑材料有限公司 | Autoclaved aerated concrete building block containing industrial solid waste and preparation method thereof |
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