CN101456711B - Preparation method of steel slag plant-growing concrete - Google Patents
Preparation method of steel slag plant-growing concrete Download PDFInfo
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- CN101456711B CN101456711B CN 200810156896 CN200810156896A CN101456711B CN 101456711 B CN101456711 B CN 101456711B CN 200810156896 CN200810156896 CN 200810156896 CN 200810156896 A CN200810156896 A CN 200810156896A CN 101456711 B CN101456711 B CN 101456711B
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- wind
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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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Abstract
The invention provides a method for preparing steel slag green-growing concrete, which is characterized in that 0.1-5 mm steel slag crushed by wind, portland cement and water are made into balls by a ball forming mill in a proportion of 1:0.1-0.25:0.05-0.10. The spherical particles are cured in the air for 12-48h to be taken as aggregate. Then the aggregate, the portland cement and the reinforcing agent are mixed and added with water to produce the steel slag green-growing concrete. The steel slag green-growing concrete prepared from the steel slag crushed by wind has 7d compressive strength more than 20MPa, porosity more than 20 percent, and pH value between 8 and 10, and is suitable for growth of plants.
Description
Technical field
The invention belongs to the concrete for plant growth field, relate generally to a kind of preparation method of steel slag plant-growing concrete
Background technology
Since the later stage 1980s, eco-friendly type concrete forms an independent educational project gradually, according to functions of use, is divided into three major types such as greening vegetation concrete, sea life protection type concrete, permeable type concrete.Concrete and goods thereof that the greening vegetation concrete is meant can be adapted to plant-growth, can carry out the vegetation operation have the protection environment, improve ecological condition, keep it as structured material effect three big functions basically.Vegetation form cellular concrete (abbreviation concrete for plant growth) is concrete one type an of greening vegetation; This concrete with cellular concrete as skeleton structure; Inside exists a certain amount of open pore; Be the space that the green plants of concrete surface provides root growth, draws nutrient, adopt cellular concrete as the plant-growth matrix, and in hole the required various materials of filling plant-growth with the growing space is provided.Concrete for plant growth is used for road both sides, motorway bank protection and the central partition in city, and positions such as waterside bank protection, roof, parking can increase concrete material surface water-permeable and air permeable property; Improve damp and hot exchange capacity, reduce the concrete material surface temperature, increase the vert space in city; Reduce urban heat land effect, regulate people's life mood, have the function that absorbs noise and dust; The eubiosis to urban climate also plays active effect, can improve the human settlement.
The material of concrete for plant growth constitutes cement (or other agglutinate), coarse aggregate, water and admixture territory and adds small amount of polymer).Coarse aggregate can be common rubble, also can be waste concrete block or haydite.Pore fluid of concrete rate and ultimate compression strength are paradox, and porosity is big, favourable plant-growth, but intensity reduces.How to confirm pore fluid of concrete rate and intensity level, satisfy requirement of engineering, Japanese eco-concrete shore protection worker law regulation, to being master's shore protection to plant life, the ultimate compression strength of 28d cellular concrete requires more than 10M Pa, and porosity is between 21%-30%; For bearing the vegetation type shore protection that flowing water seriously washes away, the ultimate compression strength of 28d cellular concrete requires more than 18MPa, and porosity is between 18%--21%.
The transformation of alkali environment is one of core of this technology in the cellular concrete hole.In Japan, the gelling material that is used for concrete for plant growth is low basicity blast furnace B, C type cement resource, and with the cellular concrete that the cement of the type makes, its surface p H value is about 8-9. suitable plant-growth.And China lacks the low alkalinity cement resource, generally adopts ordinary Portland cement preparation cellular concrete, and interpore water surrounding is without transformation, and its pH value influences plant-growth up to 12.5-13.5, and this also is one of bottle footpath of this technology.
Summary of the invention
For overcoming the above-mentioned shortcoming of prior art, the present invention proposes a kind of preparation method of steel slag plant-growing concrete, utilize the concrete for plant growth intensity of the broken slag of wind preparation high, porosity is big and pH value at 8-10, suitable plant-growth.
For solving the problems of the technologies described above; The preparation method of steel slag plant-growing concrete provided by the invention is: with the broken slag of 0.1-5mm wind and silicate cement and water by 1: 0.1-0.25: 0.05-0.10 processes the spherical particle of 10-30mm particle diameter on nodulizer; Spherical particle in air behind the maintenance 12-48h as aggregate; Again this aggregate is mixed with silicate cement, toughener, add aquatic product steel slag plant-growing concrete.
The weight percentages of components of said steel slag plant-growing concrete (%) is: the broken slag 80-88% of wind, silicate cement 10-19.5%, toughener 0.5-2%.
Described silicate cement is C32.5 or C42.5 cement.Described toughener is one or both of ethylene-vinyl acetate emulsion or Z 150PH emulsion.
The broken slag of wind is that the slag ladle that liquid steel slag is housed is transported to wind crushing device place; Tumble; Slag flows out through tundish, utilizes the high-speed air flow thigh granulating of moment realization high-temperature liquid state slag aloft, and the slag particle diameter is 0.1～5mm; Also realized simultaneously melting the chemical modification reaction process that reaches the MgO phase at liquid steel slag, the RO free calcium oxide in mutually mutually separately or admittedly with tiny, dispersion state, its reaction formula is:
2CaO+2FeO+0.5O
2＝2CaO·Fe
2O
3 ①
2CaO·FeO+0.5O
2＝2CaO·Fe
2O
3 ②
2MgO·FeO+0.5O
2＝2MgO·Fe
2O
3 ③
Physics (granulation) and chemical modification through above-mentioned moment takes place are reacted; The high-temperature liquid state slag becomes immediately stablizes activated spherical solid-state granulation slag; Eliminated unstable phase in the slag, mineral grain is tiny, more even and alkaline low, thereby suits the wind disintegrating slag is used for building materials or association area.
The salient features of ak quench steel slag concrete for plant growth
(1) ultimate compression strength
Sample dimensions is 150mm * 150mm * 150mm, according to GB50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", and form removal after the moulding, natural curing 7d under standard conditions detects its ultimate compression strength on the resistance to compression machine.Each embodiment gets 6 samples and detects, and gets the ultimate compression strength that its MV is this cellular concrete.
The ultimate compression strength of the standard cube body test block of concrete natural curing 7d surpasses or is equivalent to the intensity that general cellular concrete needs natural curing 28d more than 20MPa, mainly is the toughener role.Therefore this kind concrete can satisfy and plants living requirement.Concrete data are seen table 1.
(2) porosity
Because this concrete for plant growth surface void is more, so its measurement method of porosity adopts special skill to carry out.Concrete steps are following: measure natural curing 7d earlier, volume is the aerial quality G of V test specimen
0, and then measure its quality G in water
1By formula φ=(G
0-G
1)/V tries to achieve the porosity φ of each test specimen.Each embodiment gets 6 samples and detects, and gets the voidage that its MV is this cellular concrete.Concrete data are seen table 1.
According to detected result, porosity is more than 20%, and intensity can reach high value; Major cause is, the ak quench steel slag balling-up is used as aggregate, and its coating of particles is better than stone; And size is in certain scope; Concrete has porosity preferably after having guaranteed moulding, can satisfy the demand of plant-growth, and makes root system riotous growth in concrete.
(3) the pH value of cellular concrete such low alkalinity about 10 helps the growth of plant and organism in water.Think that according to test the concrete for plant growth that this patent relates to has made plant-growth, explain and adopt ak quench steel slag that its pH value satisfies the plant-growth requirement as concrete for plant growth.
The intensity of table 1 concrete for plant growth and porosity index
Embodiment
Embodiment 1:
Utilize broken slag of 0.1-0.5mm wind and the balling-up on nodulizer of 42.5 silicate cements; Ratio between the broken slag of wind, silicate cement, the water is: 1: 0.25: 0.10; Produce the spherical particle of 10-15mm particle diameter; Spherical particle behind the maintenance 24h, becomes qualified aggregate spherical in shape in air; Again spherical aggregate is mixed with cement, toughener, tinting material, adds aquatic product and plant living cellular concrete, the weight percent that it comprises:
83% the broken slag of balling-up after wind;
15% C42.5 cement;
1% ethylene-vinyl acetate emulsion and 0.5% Z 150PH emulsion;
0.5% red iron oxide.
The purpose of adding tinting material is in order to change concrete color, makes the color coordination of itself and surrounding environment.The performance of concrete for plant growth is shown in table 1 embodiment 1.
Planting experiment
Fill out loess and a spot of compost of 50mm at bottom, adopt the Festuca Arundinacea plant seed to broadcast on soil, pour into a mould above-mentioned concrete layer it on; Thickness is 40mm, waters every day and once carries out maintenance, after the week; The Festuca Arundinacea plant is pricked and absorbs nutrient in the soil, sees through concrete layer and grows green little grass.
Embodiment 2:
Utilize broken slag of 0.5-1.5mm wind and the balling-up on nodulizer of 32.5 silicate cements; The employing weight percent is: the ratio between the broken slag of wind, silicate cement, the water is: 1: 0.20: 0.08; Produce the spherical particle of 20-25mm particle diameter; Behind the maintenance 36h, become qualified aggregate in the spherical particle air; Again spherical aggregate is mixed with cement, toughener, tinting material, adds aquatic product cellular concrete, the weight percent that it comprises:
85% the broken slag of balling-up after wind;
12% C32.5 cement;
1% ethylene-vinyl acetate emulsion;
2% yellow oxide of iron.
The purpose of adding tinting material is in order to change concrete color, makes the color coordination of itself and surrounding environment.The performance of concrete for plant growth is shown in table 1 embodiment 2.
Planting experiment
Fill out loess and a spot of compost of 50mm at bottom, adopt the paspalum notatum plant seed to broadcast on soil, pour into a mould above-mentioned concrete layer it on; Thickness is 40mm, waters every day and once carries out maintenance, after the week; The paspalum notatum plant is pricked and absorbs nutrient in the soil, sees through concrete layer and grows green little grass.
Embodiment 3:
Utilize broken slag of 0.1-0.5mm wind and the balling-up on nodulizer of 42.5 silicate cements; The employing weight percent is: the ratio between the broken slag of wind, silicate cement, the water is: 1: 0.20: 0.07; Produce the spherical particle of 15-18mm particle diameter; Behind the maintenance 24h, become qualified aggregate spherical in shape in the spherical particle air; Again spherical aggregate is mixed with cement, toughener, tinting material, adds aquatic product cellular concrete, the weight percent that it comprises:
82% the broken slag of balling-up after wind;
13% C42.5 cement;
2% ethylene-vinyl acetate emulsion;
3% yellow oxide of iron.
The purpose of adding tinting material is in order to change concrete color, makes the color coordination of itself and surrounding environment.The performance of concrete for plant growth is shown in table 1 embodiment 3.
Planting experiment
Fill out loess and a spot of compost of 50mm at bottom, adopt the Bermuda grass plant seed to broadcast on soil, pour into a mould above-mentioned concrete layer it on; Thickness is 40mm, waters every day and once carries out maintenance, after the week; The Bermuda grass plant is pricked and absorbs nutrient in the soil, sees through concrete layer and grows green little grass.
Embodiment 4:
Utilize broken slag of 3-5mm wind and the balling-up on nodulizer of 32.5 silicate cements; The employing weight percent is: the ratio between the broken slag of wind, silicate cement, the water is: 1: 0.15: 0.06; Produce the spherical particle of 25-30mm particle diameter; Behind the maintenance 24h, become qualified aggregate spherical in shape in the spherical particle air; Again spherical aggregate is mixed with cement, toughener, adds aquatic product cellular concrete, the weight percent that it comprises:
88% the broken slag of balling-up after wind;
10% C32.5 cement;
2% Z 150PH emulsion.
The performance of concrete for plant growth is shown in table 1 embodiment 4.
Planting experiment
Fill out loess and a spot of compost of 50mm at bottom, adopt the rye grass plant seed to broadcast on soil, pour into a mould above-mentioned concrete layer it on; Thickness is 40mm, waters every day and once carries out maintenance, after the week; The rye grass plant is pricked and absorbs nutrient in the soil, sees through concrete layer and grows green little grass.
Embodiment 5:
Utilize broken slag of 0.1-0.5mm wind and the balling-up on nodulizer of 42.5 silicate cements; The employing weight percent is: the ratio between the broken slag of wind, silicate cement, the water is: 1: 0.10: 0.05; Produce the spherical particle of 10-15mm particle diameter; Behind the maintenance 24h, become qualified aggregate spherical in shape in the spherical particle air; Again spherical aggregate is mixed with cement, toughener, adds aquatic product cellular concrete, the weight percent that it comprises:
80% the broken slag of balling-up after wind;
19.5% C42.5 cement;
0.5% ethylene-vinyl acetate emulsion.
The performance of concrete for plant growth is shown in table 1 embodiment 5.
Planting experiment
Fill out loess and a spot of compost of 50mm at bottom, adopt the Herba Setariae Viridis plant seed to broadcast on soil, pour into a mould above-mentioned concrete layer it on; Thickness is 40mm, waters every day and once carries out maintenance, after the week; The Herba Setariae Viridis plant is pricked and absorbs nutrient in the soil, sees through concrete layer and grows green little grass.
Embodiment 6:
Utilize broken slag of 2-3mm wind and the balling-up on nodulizer of 32.5 silicate cements; The employing weight percent is: the ratio between the broken slag of wind, silicate cement, the water is: 1: 0.25: 0.10; Produce the spherical particle of 25-30mm particle diameter; Behind the maintenance 24h, become qualified aggregate spherical in shape in the spherical particle air; Again spherical aggregate is mixed with cement, toughener, tinting material, adds aquatic product cellular concrete, the weight percent that it comprises:
84% the broken slag of balling-up after wind;
13% C32.5 cement;
2% Z 150PH emulsion;
1% red iron oxide.
The purpose of adding tinting material is in order to change concrete color, makes the color coordination of itself and surrounding environment.The performance of concrete for plant growth is shown in table 1 embodiment 6.
Planting experiment
Fill out loess and a spot of compost of 50mm at bottom, adopt the jielu grass plant seed to broadcast on soil, pour into a mould above-mentioned concrete layer it on; Thickness is 40mm, waters every day and once carries out maintenance, after the week; The jielu grass plant is pricked and absorbs nutrient in the soil, sees through concrete layer and grows green little grass.
Claims (5)
1. the preparation method of a steel slag plant-growing concrete; It is characterized in that; With the broken slag of 0.1-5mm wind and silicate cement and water by 1: 0.1-0.25: 0.05-0.10 processes the spherical particle of 10-30mm particle diameter on nodulizer; Spherical particle in air behind the maintenance 12-48h as aggregate, again this aggregate is mixed with silicate cement, toughener, add aquatic product steel slag plant-growing concrete; The weight percentages of components of said steel slag plant-growing concrete (%) is: the broken slag 80-88% of wind, silicate cement 10-19.5%, toughener 0.5-2%.
2. the preparation method of steel slag plant-growing concrete according to claim 1 is characterized in that, described silicate cement is C32.5 or C42.5 cement.
3. the preparation method of steel slag plant-growing concrete according to claim 1 is characterized in that, described toughener is one or both of ethylene-vinyl acetate emulsion or Z 150PH emulsion.
4. according to the preparation method of the described steel slag plant-growing concrete of one of claim 1 to 3, it is characterized in that, also the tinting material of Han You ≦ 3%.
5. the preparation method of steel slag plant-growing concrete according to claim 4 is characterized in that, described tinting material is a red iron oxide, a kind of in the yellow oxide of iron.
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| CN102079105A (en) * | 2010-11-11 | 2011-06-01 | 华南理工大学 | Preparation method of ecological embankment type porous concrete special for plant growing |
| CN103130460B (en) * | 2011-12-01 | 2015-07-29 | 中冶宝钢技术服务有限公司 | A kind of vegetation type slag celluar concrete and Synthesis and applications thereof |
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| CN102584095B (en) * | 2012-02-13 | 2014-04-09 | 江苏大学 | Admixture for vegetation-form ecological concrete and compounding method thereof |
| CN102557512B (en) * | 2012-03-15 | 2013-05-15 | 北京建筑工程学院 | Additive special for planting concrete and preparation method and using method for additive |
| CN103964952A (en) * | 2014-04-29 | 2014-08-06 | 济南大学 | Fertilizer efficiency sustained release type steel slag aggregate used for plant-growing concrete and preparation method of steel slag aggregate |
| CN104891892A (en) * | 2015-05-13 | 2015-09-09 | 河海大学 | Method used for preparing simulate planting concrete from sludge |
| CN105294039B (en) * | 2015-12-02 | 2017-09-29 | 武汉钢铁有限公司 | A kind of steel slag plant-growing concrete |
| CN108129084B (en) * | 2017-12-28 | 2020-08-11 | 杨杰 | Method for preparing high-strength water permeable brick by compounding coal gangue steel slag and wheat straw ash |
| CN109942251A (en) * | 2019-02-27 | 2019-06-28 | 江苏卓坤新型环保材料有限公司 | A kind of preparation method of inorganic steel slag concrete |
| CN111116130A (en) * | 2019-12-24 | 2020-05-08 | 江阴硕人节能环保科技有限公司 | Plant growing concrete and preparation method thereof |
| CN111978017B (en) * | 2020-07-29 | 2022-06-21 | 马鞍山钢铁股份有限公司 | Bank protection engineering material and preparation method thereof |
| CN115974511A (en) * | 2022-12-26 | 2023-04-18 | 南通永诚惠海建设工程有限公司 | Low-alkali plant-growing concrete based on steel slag and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073670A (en) * | 1991-12-27 | 1993-06-30 | 中国石油天然气总公司工程技术研究所 | The anti-deforming material of bituminous concrete pavement and manufacture method thereof |
| CN101050093A (en) * | 2007-03-23 | 2007-10-10 | 钱卫胜 | Composition of road surface material of pervious cement concrete by using steel slag as aggregate, and method |
-
2008
- 2008-09-28 CN CN 200810156896 patent/CN101456711B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073670A (en) * | 1991-12-27 | 1993-06-30 | 中国石油天然气总公司工程技术研究所 | The anti-deforming material of bituminous concrete pavement and manufacture method thereof |
| CN101050093A (en) * | 2007-03-23 | 2007-10-10 | 钱卫胜 | Composition of road surface material of pervious cement concrete by using steel slag as aggregate, and method |
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