CN108395157B - Preparation method of fly ash adsorptive slope protection material - Google Patents
Preparation method of fly ash adsorptive slope protection material Download PDFInfo
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- CN108395157B CN108395157B CN201810089789.0A CN201810089789A CN108395157B CN 108395157 B CN108395157 B CN 108395157B CN 201810089789 A CN201810089789 A CN 201810089789A CN 108395157 B CN108395157 B CN 108395157B
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- fly ash
- protection material
- slope protection
- sand
- mortar
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C04B2111/0025—Compositions or ingredients of the compositions characterised by the crystal structure
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Manufacturing & Machinery (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a preparation method of a fly ash adsorption slope protection material, belongs to the field of building materials, and particularly relates to a slope protection material and a preparation method thereof. The invention aims to solve the technical problem that the existing river channel slope protection material only meets the stability of a river channel. The method comprises the following steps: firstly, preparing materials; secondly, stirring; thirdly, forming; and fourthly, maintaining to obtain the product. When fly ash adsorptivity bank protection material is applied to the bank buffering area as bank protection material, on the one hand, can play the effect of bank protection, prevent the soil erosion and water loss, on the other hand, also can adsorb the non-point source pollutant, the pollutant after the desorption like nitrogen phosphorus etc. also can be absorbed by the plant and utilized, realizes adsorbing material's regeneration. The fly ash adsorptive slope protection material has the phosphorus removal rate of 61-66 percent and the cadmium ion removal rate of 28-32 percent.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a slope protection material and a preparation method thereof.
Background
The non-point source pollution is a great problem to be treated due to the dispersion of pollutants, the wide area, the complex pollution cause and the like. In recent years, in the agricultural production process, a large amount of chemical fertilizers and pesticides are used, and after the substances enter a water body in the modes of surface runoff, permeation and the like, the water body pollution is intensified, so that the agricultural non-point source pollution becomes the most important non-point source pollution.
The treatment technology aiming at non-point source pollution at home and abroad mainly comprises a stabilization pond, an artificial wetland, a buffer zone and the like, and research and practice shows that the shore buffer zone is established on the side zone of the river bank, so that non-point source pollutants can be effectively prevented from flowing into a water body, and the method is one of effective measures for controlling the non-point source pollution. However, the buffer zone mainly removes pollutants by planting plants, and purifies water by natural force, so that the pollutant removal capacity is limited, and the plants have a fixed growth period, so that the pollutants can be purified by the plants with timeliness, and the pollutants can be purified by the plants in a non-growth period of the plants with more limited capacity.
For a long time, the traditional river course slope protection materials such as grouted or dry-masonry slope protection, cast-in-place concrete slope protection and the like are designed and constructed only from the aspects of meeting the stability of river course side slopes and the functions of flood control and drainage of river courses, and the influence on the environment and the ecology is not considered. Therefore, the invention and application of the novel ecological slope protection material are the trend of river course slope protection development.
Fly ash, which is fine ash captured from flue gas after coal combustion, is a main waste discharged from thermal power plants. Along with the rapid development of thermal power generation in China, the emission of fly ash is rapidly increased at the speed of hundred million tons every year, so that the comprehensive utilization of fly ash is developed, waste is changed into valuable, and the fly ash is an important means for solving the contradiction between power production, environmental pollution and resource shortage in China.
Disclosure of Invention
The invention aims to solve the technical problem that the prior river course slope protection material only meets the stability of the river course, provides a preparation method of a fly ash adsorption slope protection material,
the preparation method of the fly ash adsorption slope protection material comprises the following steps:
firstly, preparing materials: weighing cement, sand and water according to the mass ratio of the cement to the sand to the water of 1:3: 0.5;
secondly, stirring: putting cement and sand into a stirrer for mixing and stirring, and then adding water for fully stirring to obtain mortar;
thirdly, forming: immediately forming after preparing the mortar, fixing the empty mould and the mould sleeve on a compaction table, loading the mortar into a test mould in two layers, compacting, taking down the test mould, scraping off the redundant mortar, trowelling the surface of a test body, and then coating a layer of fly ash for trowelling;
fourthly, maintenance: and (3) placing the test mold in a standard curing box for curing, keeping the temperature of the curing box at 20 +/-1 ℃ and the relative humidity at least 90%, demolding after 24h, placing the demolded test body in a curing room for continuous curing for 28d, and obtaining the fly ash adsorption slope protection material.
The sand in the step one is river sand, and the river sand is naturally dried and then screened.
And drying the fly ash in the third step and then sieving the dried fly ash.
In the third step, the amount of the fly ash layer fly ash is 0.012-0.06g/cm2。
The fly ash in the third step is grade II.
In the fourth step, the fly ash adsorptive slope protection material is a hollow hexagonal concrete grass-planting brick with the surface loaded with fly ash.
The invention has the following beneficial effects:
because the fly ash has good adsorption effect on heavy metals, organic pollutants, nitrogen, phosphorus and the like in water, after concrete molding and before maintenance, the fly ash is smeared on the surface of concrete, the adsorption of the fly ash on the pollutants can be fully utilized, and active ingredients Ca, Al and Fe in the fly ash are carried on the surface of the concrete and are converted into effective ingredients in the adsorption material. The fly ash adsorptive slope protection material has the phosphorus removal rate of 61-66 percent and the cadmium ion removal rate of 28-32 percent.
Detailed Description
The technical solution of the present invention is not limited to the following specific embodiments, but includes any combination of the specific embodiments.
The first embodiment is as follows: the preparation method of the fly ash adsorption slope protection material of the embodiment is carried out according to the following steps:
firstly, preparing materials: weighing cement, sand and water according to the mass ratio of the cement to the sand to the water of 1:3: 0.5;
secondly, stirring: putting cement and sand into a stirrer for mixing and stirring, and then adding water for fully stirring to obtain mortar;
thirdly, forming: immediately forming after preparing the mortar, fixing the empty mould and the mould sleeve on a compaction table, loading the mortar into a test mould in two layers, compacting, taking down the test mould, scraping off the redundant mortar, trowelling the surface of a test body, and then coating a layer of fly ash for trowelling;
fourthly, maintenance: and (3) placing the test mold in a standard curing box for curing, keeping the temperature of the curing box at 20 +/-1 ℃ and the relative humidity at least 90%, demolding after 24h, placing the demolded test body in a curing room for continuous curing for 28d, and obtaining the fly ash adsorption slope protection material.
The second embodiment is as follows: the difference between the first embodiment and the second embodiment is that the sand in the first step is river sand, and the river sand is naturally dried and then screened. The rest is the same as the first embodiment.
The third concrete implementation mode: the difference between the embodiment and the first or second embodiment is that the fly ash in the third step is dried and then sieved. The other is the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between the first embodiment and the third embodiment is that the amount of the fly ash layer fly ash in the third step is 0.012-0.06g/cm2. The others are the same as in one of the first to third embodiments.
The fifth concrete implementation mode: the difference between the third embodiment and the first to the fourth embodiment is that the fly ash in the third embodiment is class ii. The other is the same as one of the first to fourth embodiments.
The sixth specific implementation mode: the difference between this embodiment and one of the first to fifth embodiments is that the relative humidity in step four is 91% -98%. The other is the same as one of the first to fifth embodiments.
The seventh embodiment: the difference between the present embodiment and one of the first to sixth embodiments is that the fly ash-adsorbing slope protection material in the fourth step is a hollow hexagonal concrete grass-planting brick with fly ash carried on the surface. The other is the same as one of the first to sixth embodiments.
The following experiments are adopted to verify the effect of the invention:
experiment one:
(1) pretreating fly ash and river sand: drying the fly ash, sieving, naturally drying river sand, and sieving.
(2) Preparing materials: weighing cement, sand and water according to the mass ratio of cement to sand to water of 1:3: 0.5.
(3) Stirring: and putting the cement and the sand into a stirrer for mixing and stirring, and then adding water for fully stirring to obtain the mortar.
(4) Molding: molding immediately after the preparation of the mortar, fixing the empty mold and the mold sleeve on a compaction table, loading the mortar into a test mold in two layers, compacting, taking off the test mold, scraping off the excessive mortar, smoothing the surface of the test body, and coating 0.036g/cm2And (5) leveling the fly ash.
(5) And (5) maintenance: and (3) placing the test mold in a standard curing box for curing, keeping the temperature of the curing box at 20 ℃ and the relative humidity at least 90%, demolding after 24h, placing the demolded test body in a curing room for continuous curing for 28d, and obtaining the fly ash adsorption slope protection material.
The fly ash adsorptive slope protection material obtained in the experiment is subjected to constant temperature oscillation adsorption test at the temperature of 20 ℃, the rotating speed of 120r/min, the initial phosphorus concentration of 0.6mg/l and the initial cadmium ion concentration of 0.7mg/l, and after constant temperature oscillation for 3 hours, the removal rate of the fly ash adsorptive slope protection material to phosphorus is 66% and the removal rate of the cadmium ion is 32%.
Experiment two
(1) Pretreating fly ash and river sand: drying the fly ash, sieving, naturally drying river sand, and sieving.
(2) Preparing materials: weighing cement, sand and water according to the mass ratio of cement to sand to water of 1:3: 0.5.
(3) Stirring: and putting the cement and the sand into a stirrer for mixing and stirring, and then adding water for fully stirring to obtain the mortar.
(4) Molding: molding immediately after the preparation of the mortar, fixing the empty mold and the mold sleeve on a compaction table, loading the mortar into a test mold in two layers, compacting, taking down the test mold, scraping off the excessive mortar, smoothing the surface of the test body, and coating 0.06g/cm2And (5) leveling the fly ash.
(5) And (5) maintenance: and (3) placing the test mold in a standard curing box for curing, keeping the temperature of the curing box at 20 +/-1 ℃ and the relative humidity at least 90%, demolding after 24h, placing the demolded test body in a curing room for continuous curing for 28d, and obtaining the fly ash adsorption slope protection material.
The fly ash adsorptive slope protection material obtained in the experiment is subjected to constant temperature oscillation adsorption test at the temperature of 20 ℃, the rotating speed of 120r/min, the initial phosphorus concentration of 0.6mg/l and the initial cadmium ion concentration of 0.7mg/l, and after constant temperature oscillation for 3 hours, the fly ash adsorptive slope protection material has the phosphorus removal rate of 61% and the cadmium ion removal rate of 28%.
Claims (3)
1. The preparation method of the fly ash adsorption slope protection material is characterized in that the preparation method of the fly ash adsorption slope protection material is carried out according to the following steps:
firstly, preparing materials: weighing cement, sand and water according to the mass ratio of the cement to the sand to the water of 1:3: 0.5;
secondly, stirring: putting cement and sand into a stirrer for mixing and stirring, and then adding water for fully stirring to obtain mortar;
thirdly, forming: immediately forming after preparing the mortar, fixing the empty mould and the mould sleeve on a compaction table, loading the mortar into a test mould in two layers, compacting, taking down the test mould, scraping off the redundant mortar, trowelling the surface of a test body, and then coating a layer of fly ash for trowelling;
fourthly, maintenance: placing the test mold in a standard curing box for curing, keeping the temperature of the curing box at 20 +/-1 ℃ and the relative humidity of the curing box at least 90%, demolding after 24 hours, placing the demolded test body in a curing room for continuous curing for 28 days to obtain the fly ash adsorption slope protection material;
in the third step, the amount of the fly ash layer fly ash is 0.012-0.06g/cm2；
The fly ash in the third step is grade II;
the relative humidity in the fourth step is 91-98%;
in the fourth step, the fly ash adsorptive slope protection material is a hollow hexagonal concrete grass-planting brick with the surface loaded with fly ash.
2. The method for preparing a fly ash adsorbing slope protection material according to claim 1, wherein the sand in the step one is river sand, and the river sand is naturally dried and sieved.
3. The method for preparing the fly ash adsorbing slope protection material according to claim 1, wherein the fly ash in the third step is dried and sieved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810089789.0A CN108395157B (en) | 2018-01-30 | 2018-01-30 | Preparation method of fly ash adsorptive slope protection material |
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| CN201810089789.0A CN108395157B (en) | 2018-01-30 | 2018-01-30 | Preparation method of fly ash adsorptive slope protection material |
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| CN108395157A CN108395157A (en) | 2018-08-14 |
| CN108395157B true CN108395157B (en) | 2020-08-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005095300A1 (en) * | 2004-03-30 | 2005-10-13 | Kumagai Gumi Co., Ltd. | Concrete composition, process for producing the same, method of regulating viscosity, and method of constructing cast-in-place concrete pile from the concrete composition |
| CN104674755A (en) * | 2015-01-26 | 2015-06-03 | 沈睿 | Ecological slope protecting method |
| CN107056177A (en) * | 2017-06-23 | 2017-08-18 | 济南大学 | A kind of composite light aggregate eco-cement concrete floating bed and preparation method thereof |
| CN107140890A (en) * | 2017-06-12 | 2017-09-08 | 刘忠元 | A kind of concrete for plant growth and its construction method |
-
2018
- 2018-01-30 CN CN201810089789.0A patent/CN108395157B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005095300A1 (en) * | 2004-03-30 | 2005-10-13 | Kumagai Gumi Co., Ltd. | Concrete composition, process for producing the same, method of regulating viscosity, and method of constructing cast-in-place concrete pile from the concrete composition |
| CN104674755A (en) * | 2015-01-26 | 2015-06-03 | 沈睿 | Ecological slope protecting method |
| CN107140890A (en) * | 2017-06-12 | 2017-09-08 | 刘忠元 | A kind of concrete for plant growth and its construction method |
| CN107056177A (en) * | 2017-06-23 | 2017-08-18 | 济南大学 | A kind of composite light aggregate eco-cement concrete floating bed and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 粉煤灰深度处理低浓度的磷;曾丽璇 等;《环境工程学报》;20150430;第9卷(第4期);第1778-1782页 * |
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Effective date of registration: 20210804 Address after: 1 Exhibition Road, Xicheng District, Beijing Patentee after: Beijing University of Civil Engineering and Architecture Address before: 150001 No. 92 West straight street, Nangang District, Heilongjiang, Harbin Patentee before: HARBIN INSTITUTE OF TECHNOLOGY |