CN111978016A - Sludge composite particles, vegetation concrete and preparation method and application thereof - Google Patents
Sludge composite particles, vegetation concrete and preparation method and application thereof Download PDFInfo
- Publication number
- CN111978016A CN111978016A CN202010733580.0A CN202010733580A CN111978016A CN 111978016 A CN111978016 A CN 111978016A CN 202010733580 A CN202010733580 A CN 202010733580A CN 111978016 A CN111978016 A CN 111978016A
- Authority
- CN
- China
- Prior art keywords
- sludge
- particles
- cement
- composite particles
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0418—Wet materials, e.g. slurries
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1003—Non-compositional aspects of the coating or impregnation
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Treatment Of Sludge (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of concrete, in particular to sludge composite particles, vegetation concrete and a preparation method and application thereof. The sludge composite particles comprise sludge particles and coating materials for coating the sludge particles; the raw material of the sludge particles comprises sludge and/or biomass material; the raw materials of the coating material comprise cement and/or slag micropowder. The vegetation concrete has certain bearing capacity, and the municipal sludge contained in the vegetation concrete contains rich organic matters and nitrogen, phosphorus and potassium components, and can slowly provide nutrition for plants after being fermented together with biomass materials such as vinegar residue, rice hulls, sawdust and straws.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to sludge composite particles, vegetation concrete and a preparation method and application thereof.
Background
According to statistics, the annual output of national town sludge (with water content of 80%) in 2017 is close to 6000 ten thousand tons. The sludge contains rich organic matters, nitrogen, phosphorus, potassium and other components, and also contains certain ova, germs and heavy metals. At present, the treatment of sludge is mainly performed on sanitary landfill, on one hand, a large amount of land resources are occupied, on the other hand, potential environmental risks exist, and the harmless and resource utilization of sludge is paid more and more attention. The sludge resource application direction comprises the application of the sludge as building materials (such as wall firing materials, ceramsite firing and the like), the application of the sludge as green plants (sludge compost) and the like, but certain limitations exist, for example, the production of sintered bricks is banned in partial areas, the production of the sludge compost occupies a large area, and the period is long, so that the sludge resource utilization needs to develop a proper resource utilization way according to the local actual conditions.
The vegetation concrete, also called ecological concrete, is a concrete with certain strength and a pore structure prepared by using aggregate with specific particle size as a supporting framework and bonding a small amount of cementing materials, can realize the functions of bearing and greening and planting, and has wide application prospect in the scenes of river course slope protection, road side slopes, parking lots and the like.
In the prior art, heavy metals which are difficult to decompose in sludge are separated in advance through the adsorption of microorganisms; then, the organic waste in the sludge is sterilized and egg-killed under continuous high-temperature fermentation through microbial fermentation and curing, so that the nutrient substances in the sludge are retained to the maximum extent, and the harmful substances are decomposed, removed and passivated to the maximum extent; and finally, dewatering and drying are carried out, sludge is converted into nutrient soil from waste, but the problems of large occupied area, long fermentation period and the like exist, and the treatment and utilization requirements of a large amount of sludge are difficult to meet.
In addition, in the prior art, the dredged sludge is assisted with other materials, the non-sintered ceramsite is prepared as the vegetation concrete aggregate through natural curing, organic fertilizer and mucky soil raw materials are poured into the prepared vegetation concrete, the resource utilization of the dredged sludge is realized, but the problems that the preparation period of the non-sintered ceramsite is long, the sludge is not subjected to harmless treatment, and the poured sludge possibly emits peculiar smell still exist.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention aims to provide a sludge composite particle, a vegetation concrete, and a preparation method and application thereof. The vegetation concrete has certain bearing capacity, and the municipal sludge contained in the vegetation concrete contains rich organic matters and nitrogen, phosphorus and potassium components, and can slowly provide nutrition for plants after being fermented together with biomass materials such as vinegar residue, rice hulls, sawdust and straws.
To achieve the above and other related objects, an aspect of the present invention provides a sludge composite granule comprising sludge granules and a coating material for coating the sludge granules; the raw material of the sludge particles comprises sludge and/or biomass material; the raw materials of the coating material comprise cement and/or slag micropowder.
In some embodiments of the invention, the mass ratio of the coating material to the sludge particles is 1-7: 1.
In some embodiments of the invention, the sludge is dried sludge having a water content of 50% or less.
In some embodiments of the invention, the biomass material is selected from the group consisting of one or more of vinegar residue, rice hulls, wood chips, straw; the particle size of the biomass material is less than or equal to 3 mm.
In some embodiments of the invention, the sludge particles have a diameter of 3 to 6 mm.
In some embodiments of the present invention, the sludge composite particles have a diameter of 5 to 10 mm.
In some embodiments of the invention, the biomass material is 0-20% by weight of the sludge; preferably 5 to 15%.
In some embodiments of the present invention, the mass ratio of the cement to the fine slag powder is 1:0 to 0.7; preferably 1:0.3 to 0.6.
In some embodiments of the present invention, the fine slag powder has a specific surface area of not less than 420m2/kg。
In another aspect, the present invention provides a method for preparing the sludge composite particles, comprising: preparing sludge and/or biomass materials to obtain sludge particles; mixing cement and/or slag micro powder and water, and coating the mixture on the surface of sludge particles to prepare the sludge composite particles.
In some embodiments of the present invention, the sludge composite granules obtained by the preparation are steamed.
In some embodiments of the invention, the steam-curing conditions are: keeping the temperature at 40-50 ℃ and the humidity at 80-95% for 1.5-3 h; heating to 80-90 ℃, and keeping the humidity of 80-95% for 2-5 h; cooling to room temperature.
In some embodiments of the present invention, the water is 5 to 20%, preferably 10 to 20% of the total weight of the cement and/or fine slag powder.
According to another aspect of the invention, vegetation concrete is provided, and raw materials of the vegetation concrete comprise the sludge composite particles, cement, slag micropowder, broken stone, an additive and water.
In some embodiments of the invention, the mass ratio of the cement, the slag micropowder, the crushed stone, the sludge composite particles and the additive is 1: 0-1: 2.5-6.5: 0-5: 0.001-0.03, the water-gel ratio is 0.2-0.35, and the bone-slurry ratio is 0.2-0.3.
In some embodiments of the present invention, the mass ratio of the cement, the fine slag powder, the crushed stone, the sludge composite particles and the admixture is 1: 0.3-0.6: 3-6: 1-3: 0.001-0.03, the water-glue ratio is 0.2-0.3, and the bone-slurry ratio is 0.2-0.3.
In some embodiments of the invention, the admixture is selected from one or more of a water reducer, an early strength agent, or a combination of water reducer agents.
In some embodiments of the invention, the crushed stone has a particle size of 5 to 20 mm.
In some embodiments of the present invention, the fine slag powder has a specific surface area of not less than 420m2/kg。
On the other hand, the invention provides the preparation method of the vegetation concrete, which comprises the step of uniformly stirring cement, slag micropowder, broken stone, sludge composite particles, an additive and water to obtain the vegetation concrete.
The invention also provides application of the sludge composite particles or the vegetation concrete in the fields of slope protection engineering and pavement construction.
Drawings
FIG. 1 is a schematic view of the structure of a sludge composite granule.
FIG. 2 is a schematic diagram showing the use state of the prepared concrete containing the sludge composite particles.
Detailed Description
The applicant of the invention has surprisingly found through a large number of experiments that the sludge composite particles are coated with the sludge particles by a coating technology to form a core-shell structure, wherein the sludge particles are cores and the coating material is shells, so that peculiar smell generated in the subsequent natural fermentation process of the sludge can not be emitted, air pollution is avoided, and cement and/or slag micropowder suitable for being used as the coating material is selected. Sludge and/or biomass materials are mixed in the sludge particles, the sludge contains rich organic matters and nitrogen, phosphorus and potassium components, and after the sludge and the biomass materials such as vinegar residue, rice hulls, sawdust, straws and the like are fermented together, nutrition can be provided for plants slowly and in a long time. Acidic substances generated by sludge fermentation gradually erode the shell (coating material), so that the shell generates more microporous structures, and long-term release of nutrient components is facilitated. The vegetation concrete is prepared by further mixing the sludge composite particles with cement, slag micropowder, broken stone, additives and the like, has certain strength and bearing capacity, has certain porosity and air-permeable and water-permeable functions, is favorable for plant root growth, and has a certain water storage function after plant growth. Realizes the harmlessness and reclamation of sludge such as municipal sludge, and has simple preparation method process, easily obtained raw materials and controllable process. On the basis of this, the present invention has been completed.
The invention provides a sludge composite particle, which comprises sludge particles and a coating material for coating the sludge particles; the raw material of the sludge particles comprises sludge and/or biomass material; the raw materials of the coating material comprise cement and/or slag micropowder.
In the sludge composite particles provided by the invention, the mass ratio of the coating material to the sludge particles is (1-7): 1. in some embodiments, the mass ratio of the coating material to the sludge particles can be 1-2: 1, 2-5: 1, 5-7: 1, 2-6: 1, or 3-4: 1. the mass ratio of the coating material to the sludge particles is preferably 2-6: 1.
in the sludge composite particles provided by the invention, in a specific embodiment, raw materials of the sludge particles can comprise sludge and biomass materials. In another embodiment, the feedstock of sludge particles may comprise sludge.
In the sludge composite particles provided by the present invention, the type of sludge is not limited in general, and may be, for example, municipal sludge. In one embodiment, the sludge is dehydrated and dried sludge, and the specific method is low-temperature vacuum dehydration and drying. Specifically, the sludge is dried sludge with the water content of less than or equal to 50%. In some embodiments, the sludge may have a water content of, for example, 1-5%, 5-10%, 10-20%, 20-30%, 30-40%, or 40-50%. The water content of the sludge is detected by CJ/T221-2005 sludge inspection method of municipal wastewater treatment plant.
In the sludge composite particles provided by the present invention, the biomass material is not particularly limited in general, and in a specific embodiment, the biomass material is selected from one or more of vinegar residue, rice hull, wood dust, and straw. The particle size of the biomass material is less than or equal to 3mm, namely the biomass material needs to be crushed to be less than 3mm for later use.
In the sludge composite particles provided by the invention, the biomass material accounts for 0-20% of the weight of the sludge. In some embodiments, the biomass material is 0-10% by weight of the sludge; 10-20%; 1-10%; 1-20%; 1-5%; 5-15%; 15-20%; 0 to 1 percent; 1-3%; 3-5%; 5-8%; 8-10%, 10-15%, or 15-20%. Preferably, the biomass material accounts for 5-15% of the weight of the sludge, and more preferably, the biomass material accounts for 8-10% of the weight of the sludge.
In the sludge composite particles provided by the invention, the diameter of the sludge composite particles is 5-10 mm, 6-10 mm, 5-7 mm, 7-10 mm, 5-6 mm, 6-7 mm, 7-8 mm, 8-9 mm, or 9-10 mm. The diameter of the sludge particles is 3-6 mm, 3-4 mm, 4-5 mm, or 5-6 mm. And may be spherical or oblate spherical.
In the sludge composite granule provided by the invention, in a specific embodiment, the raw materials of the coating material can comprise cement and slag micropowder. In another embodiment, the raw material of the coating material may include cement. In another embodiment, the raw material of the coating material may include fine slag powder.
In the sludge composite particles provided by the invention, the mass ratio of the cement to the slag micropowder is 1:0 to 0.7; in some embodiments, the mass ratio of the cement to the fine slag powder may be 1: 0.1-0.7, 0.2-0.6, 1: 0.1-0.6, 1: 0.1-0.3, 1: 0.3-0.6, 1: 0.3-0.5, 1: 0.1-0.2, 1: 0.2-0.3, 1: 0.3-0.4, 1: 0.4-0.5, 1:0.5 to 0.6, or 1:0.6 to 0.7. The mass ratio of the cement to the slag micro powder is preferably 1: 0.2-0.6, 1:0.3 to 0.6 or 1:0.3 to 0.5.
In the sludge composite particles provided by the present invention, the cement is not particularly limited, and may be general purpose cement, such as portland cement, and more specifically, p.ii 42.5 ordinary portland cement.
In the sludge composite particles provided by the invention, the specific surface area of the slag micro powder is not less than 420m2/kg。
In the sludge composite particles provided by the invention, water is needed in the process of preparing the coating material. The water accounts for 5-20%, 5-15%, 10-20%, 5-8%, 8-12%, 12-15%, 5-10%, 10-15% or 15-20% of the total weight of the raw materials (cement and/or slag micropowder) of the coating material.
In a second aspect of the present invention, there is provided a method for preparing the sludge composite granules according to the first aspect of the present invention, comprising: preparing sludge and/or biomass materials to obtain sludge particles; coating the surface of the sludge particles with a coating material prepared from cement and/or slag micropowder to prepare the sludge composite particles.
In the preparation method of the sludge composite particles provided by the invention, in the step of preparing the sludge particles from the sludge and/or biomass material, the sludge and/or biomass material is required to be extruded and formed, for example, by adopting a roller extrusion technology, spherical or oblate-shaped sludge particles with the diameter of 3-6 mm, 3-4 mm, 4-5 mm or 5-6 mm can be extruded. The biomass material is not limited in general, and in a specific embodiment, the biomass material may be selected from one or more of vinegar residue, rice hull, wood chips, and straw. The biomass material accounts for 0-20% of the weight of the sludge. In some embodiments, the biomass material is 0-10% by weight of the sludge; 10-20%; 1-10%; 1-20%; 1-5%; 5-15%; 15-20%; 0 to 1 percent; 1-3%; 3-5%; 5-8%; 8-10%, 10-15%, or 15-20%. Preferably, the biomass material accounts for 5-15% of the weight of the sludge, and more preferably, the biomass material accounts for 8-10% of the weight of the sludge.
In the preparation method of the sludge composite particles, in the step of preparing the coating material from cement and slag micropowder, the mass ratio of the cement to the slag micropowder is 1:0 to 0.7; in some embodiments, the mass ratio of the cement to the fine slag powder may be 1: 0.1-0.7, 0.2-0.6, 1: 0.1-0.6, 1: 0.1-0.3, 1: 0.3-0.6, 1: 0.3-0.5, 1: 0.1-0.2, 1: 0.2-0.3, 1: 0.3-0.4, 1: 0.4-0.5, 1:0.5 to 0.6, or 1:0.6 to 0.7. The mass ratio of the cement to the slag micro powder is preferably 0.2-0.6, 1:0.3 to 0.6 or 1:0.3 to 0.5.
In the preparation method of the sludge composite particles, in the step of coating the coating material on the surface of the sludge particles to prepare the sludge composite particles, a disc granulation technology (for example, a disc granulator can be adopted) is utilized, the disc granulator rotates at a constant speed of 10-25 rpm, the coating material is uniformly sprayed on the surface of the sludge particles, and the coating material is coated on the sludge particles layer by layer through continuous rotation and extrusion of the sludge particles to form the sludge composite particles with the diameter of 5-10 mm. In some embodiments, the sludge composite particles have a diameter of 6 to 10mm, 5 to 7mm, 7 to 10mm, 5 to 6mm, 6 to 7mm, 7 to 8mm, 8 to 9mm, or 9 to 10 mm.
In the preparation method of the sludge composite particles, the mass ratio of the coating material to the sludge particles is (1-7): 1. in some embodiments, the mass ratio of the coating material to the sludge particles can be 1-2: 1, 2-5: 1, 5-7: 1, 2-6: 1, or 3-4: 1. the mass ratio of the coating material to the sludge particles is preferably 2-6: 1.
according to the preparation method of the sludge composite particles, cement and/or slag micro powder and water are mixed and then coated on the surface of the sludge particles to prepare the sludge composite particles, wherein the water accounts for 5-20%, 5-15%, 10-20%, 5-15%, 5-8%, 8-12%, 12-15%, 5-10% or 10-15% of the weight of the cement and/or slag micro powder.
In the preparation method of the sludge composite particles provided by the invention, the prepared sludge composite particles need to be further steamed to form certain strength, and meanwhile, roundworm eggs and fecal coliform contained in the sludge are killed by utilizing high temperature. The steam-curing equipment is not particularly limited, and in general, the sludge composite particles are put into the steam-curing equipment under the following steam-curing conditions: keeping the temperature at 40-50 ℃, 40-45 ℃, or 45-50 ℃ for 1.5-3 h, 1.5-2 h, or 2-3 h; heating to 80-90 ℃, 80-85 ℃, or 85-90 ℃, keeping the humidity of 80-95%, 80-85%, 85-90% or 90-95% for 2-5 h, 2.5-5 h, 2-3 h, 3-4 h, 4-5 h, or 2.5-4 h; cooling to room temperature. In one embodiment, the temperature is raised to 40-50 ℃ at a speed of 10 ℃/h, the humidity is 80-90%, the temperature is kept for 2h, the temperature is raised to 80-90 ℃ at a speed of 10 ℃/h, the humidity is 80-95%, the temperature is kept for 4h, and finally the temperature is lowered to the room temperature at a speed of 10 ℃/h.
The third aspect of the invention provides vegetation concrete, wherein the raw materials of the vegetation concrete comprise the sludge composite particles of the first aspect of the invention, and further comprise cement, slag micropowder, crushed stone, an additive and water.
In the vegetation concrete provided by the invention, the mass ratio of cement to slag micropowder is 1: 0-1, 1: 0.2-0.6, 1: 0.1-0.3, 1: 0.3-0.5, 1:0.5 to 0.7, or 1: 0.7 to 1.
In the vegetation concrete provided by the invention, the mass ratio of the cement to the broken stone is 1: 2.5-6.5, 1: 3-6, 1: 3-5, 1: 5-6, 1: 3-4, 1: 4-5, 1: 3-3.5, 1: 3.5-4, 1: 4-4.5, 1: 4.5-5, 1: 5-5.5, or 1: 5.5 to 6.
In the vegetation concrete provided by the invention, the mass ratio of the cement to the sludge composite particles is 1: 0-5, 1: 1-5, 1: 1-3, 1: 1-1.5, 1: 1.5-2, 1: 2-2.5, 1: 2.5-3, 1: 3.5-4, 1: 4-4.5, or 1: 4.5 to 5.
In the vegetation concrete provided by the invention, the mass ratio of the cement to the admixture is 0.001-0.03, 1: 0.001-0.002, 1: 0.002 to 0.005, 1: 0.002 to 0.008, 1: 0.005-0.01, 1: 0.01-0.015, 1: 0.015-0.02, 1: 0.02 to 0.025, or 1: 0.025 to 0.03.
In the vegetation concrete provided by the invention, the water-to-glue ratio is 0.2-0.35, 0.2-0.3, 0.2-0.25, 0.25-0.3 or 0.3-0.35. The bone-to-pulp ratio is 0.2-0.3, 0.2-0.25, 0.25-0.3. The water-cement ratio refers to the ratio of water consumption per cubic meter of concrete to the consumption of all cementing materials, and specifically, in the application, the cementing materials comprise cement and slag micro powder. The bone cement ratio refers to the contrast relationship between cement paste and the using amount of aggregate, and particularly in the application, the aggregate comprises broken stone and sludge composite particles.
In a specific embodiment, the mass ratio of the cement, the slag micropowder, the crushed stone, the sludge composite particles and the additive is 1: 0-1: 2.5-6.5: 0-5: 0.001-0.03, the water-gel ratio is 0.2-0.35, and the bone-slurry ratio is 0.2-0.3.
In one embodiment, the mass ratio of the cement, the slag micropowder, the broken stone, the sludge composite particles and the additive is 1: 0-1: 3-6: 1-3.5: 0.001-0.03, the water-glue ratio is 0.2-0.3, and the bone-slurry ratio is 0.2-0.3.
In one embodiment, the mass ratio of the cement, the slag micropowder, the crushed stone, the sludge composite particles and the additive is 1: 0.3-0.6: 3-6: 1-3: 0.001-0.03, the water-glue ratio is 0.2-0.3, and the bone-slurry ratio is 0.2-0.3.
In a specific embodiment, the mass ratio of the cement, the slag micropowder, the crushed stone, the sludge composite particles, the additive and the water is 1: 0.3-0.5: 3-6: 1-3: 0.001-0.03: 0.2-0.6, the water-glue ratio is 0.25-0.35, and the bone-slurry ratio is 0.2-0.3.
In a specific embodiment, the mass ratio of the cement, the slag micropowder, the crushed stone, the sludge composite particles, the additive and the water is 1: 0-1: 3-5: 0-1: 0.001-0.03: 0.2-0.6, the water-glue ratio is 0.25-0.35, and the bone-slurry ratio is 0.2-0.3.
In a preferred embodiment, the mass ratio of the cement, the slag micro powder, the crushed stone, the sludge composite particles, the admixture and the water is 1: 0.2-0.4: 3.2-4.5: 0.2-0.8: 0.002-0.02: 0.2-0.4, the water-glue ratio is 0.25-0.35, and the bone-slurry ratio is 0.2-0.3.
In the vegetation concrete provided by the present invention, the cement is not particularly limited in general, and may be general purpose cement such as portland cement, and more specifically, p.ii 42.5 ordinary portland cement.
In the vegetation concrete provided by the invention, the specific surface area of the slag micropowder is not less than 420m2/kg。
In the vegetation concrete provided by the invention, the particle size of the macadam is 5-20 mm. In some embodiments, the crushed stone may have a particle size of 5 to 10mm, 10 to 15mm, or 15 to 20 mm.
In the vegetation concrete provided by the invention, the additive is selected from one or more of a water reducing agent, an early strength agent or a glue reducing agent. The water reducing agent can be, for example, a common water reducing agent or a high-efficiency water reducing agent, and further, the high-efficiency water reducing agent can be, for example, an FND naphthalene water reducing agent with a water reducing rate of more than 20% produced by Wanshan chemical Co., Ltd, Shandong; the common water reducing agent may be, for example, calcium lignosulfonate manufactured by Shanghai Tingif chemical Co., Ltd. The early strength agent may be, for example, a concrete early strength agent manufactured by Wedner chemical technology (Zhejiang) Co. The gel reducing agent can be HZL-308 gel reducing agent manufactured by Nanjing Hengli building materials science and technology Limited.
The fourth aspect of the invention provides a method for preparing vegetation concrete provided by the third aspect of the invention, which comprises the steps of mixing cement, slag micropowder, broken stone, sludge composite particles, an additive and water to prepare the vegetation concrete.
In the preparation method of the vegetation concrete provided by the invention, all the components are uniformly stirred according to the proportion in the third aspect of the invention and then are prepared. In a specific embodiment, the sludge composite particles may be sludge composite particles steamed according to the second aspect of the present invention.
In a fourth aspect, the present invention provides use of the sludge composite particles according to the first aspect of the present invention or the vegetation concrete according to the second aspect of the present invention in the fields of slope protection engineering and pavement construction.
In the application provided by the invention, the pavement construction can be, for example, paving the sludge composite particles or vegetation concrete on the pavement of river channel revetments, highway slopes, parking lots and the like. The thickness of the paving can be 40-100 mm, for example.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention uses dewatered and dried municipal sludge as a raw material, does not need to be completely fermented, and greatly saves the land and time cost of compost production when the sludge is used as a fertilizer.
(2) The invention utilizes the high-temperature steam-curing technology to kill the ova and germs in the municipal sludge, thereby realizing the harmlessness of the sludge.
(3) The invention has the effect of isolating the peculiar smell of sludge fermentation at the early stage by wrapping the sludge.
(4) The invention utilizes the acidic substances generated by the fermentation of the sludge and/or the biomass raw material to gradually erode the composite particle shell, so that the shell generates more microporous structures, which is beneficial to the long-term release of nutrient components.
(5) The invention adopts the slag micro powder to replace part of cement, reduces the pH value of the concrete and is beneficial to the growth of plants.
(6) The vegetation concrete has the functions of ventilating and permeating water and providing nutrition for plant growth in a long time, and also has a certain water storage function after the plant growth.
(7) The preparation method has the advantages of simple preparation process, easily obtained raw materials and controllable process.
The following examples are provided to further illustrate the advantageous effects of the present invention.
In order to make the objects, technical solutions and advantageous technical effects of the present invention more clear, the present invention is further described in detail below with reference to examples. However, it should be understood that the embodiments of the present invention are only for explaining the present invention and are not for limiting the present invention, and the embodiments of the present invention are not limited to the embodiments given in the specification. The examples were prepared under conventional conditions or conditions recommended by the material suppliers without specifying specific experimental conditions or operating conditions.
Furthermore, it is to be understood that one or more method steps mentioned in the present invention does not exclude that other method steps may also be present before or after the combined steps or that other method steps may also be inserted between these explicitly mentioned steps, unless otherwise indicated; it is also to be understood that a combined connection between one or more devices/apparatus as referred to in the present application does not exclude that further devices/apparatus may be present before or after the combined device/apparatus or that further devices/apparatus may be interposed between two devices/apparatus explicitly referred to, unless otherwise indicated. Moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content.
In the following examples, reagents, materials and instruments used are commercially available unless otherwise specified.
The following examples show that the common water reducing agent used for the vegetation concrete is calcium lignosulfonate produced by Shanghai Tingwu chemical Co., Ltd, the high efficiency water reducing agent is FND naphthalene water reducing agent produced by Shandong Wanshan chemical Co., Ltd, the early strength agent is a concrete early strength agent produced by Weide-resistant chemical technology (Zhejiang) Co., Ltd, and the gel reducing agent is HZL-308 gel reducing agent produced by Nanjing Hengli building materials technology Co., Ltd.
Example 1
Processing municipal sludge with the water content of 48% into sludge particles with the diameter of 5mm by a double-roller extrusion technology; uniformly mixing cement and water according to the proportion of 1:0.16 for later use; adding 1 part by mass of sludge granules into a disc granulator, enabling the disc granulator to rotate at a constant speed of 20 r/min, and simultaneously uniformly spraying 3 parts by mass of mixed coating materials on the surfaces of the sludge granules until the diameter of the sludge composite granules reaches about 7 mm; putting the sludge composite particles into steam curing equipment, heating to 45 ℃ at the speed of 10 ℃/h, keeping the humidity at 80 percent, keeping the temperature for 2h, heating to 85 ℃ at the speed of 10 ℃/h, keeping the temperature at 80 percent, keeping the temperature for 4h, and finally cooling to room temperature at the speed of 10 ℃/h; cement, crushed stone of 5-10 mm, steamed sludge composite particles, a common water reducing agent and water are mixed according to the proportion of 1: 4: 2: 0.0025: 0.25, wherein the water-gel ratio is 0.25, and the bone-slurry ratio is 0.19. Uniformly paving the concrete on the river slope surface with the thickness of 45mm, and covering a layer of greening planting soil with the thickness of 30mm on the surface after the concrete is solidified.
Example 2
Municipal sludge with the water content of 43 percent and vinegar residue accounting for 10 percent of the weight of the municipal sludge are mixed by a double-roll extrusion technology and then processed into sludge particles with the diameter of 6 mm; uniformly mixing cement, slag micro powder and water according to the proportion of 1:0.5:0.2 for later use; adding 1 part by mass of sludge granules into a disc granulator, enabling the disc granulator to rotate at a constant speed of 20 r/min, and simultaneously uniformly spraying 4 parts by mass of mixed coating materials on the surfaces of the sludge granules until the diameter of the sludge composite granules reaches about 9 mm; putting the sludge composite particles into steam curing equipment, heating to 45 ℃ at the speed of 10 ℃/h, keeping the humidity at 80%, keeping the temperature for 2h, heating to 90 ℃ at the speed of 10 ℃/h, keeping the temperature at 80%, keeping the temperature for 4h, and finally cooling to room temperature at the speed of 10 ℃/h; cement, slag micro powder, crushed stone of 5-10 mm, steamed sludge composite particles, a high-efficiency water reducing agent and water in a ratio of 1:0.5: 5: uniformly stirring the mixture according to the mass ratio of 2.2:0.02:0.35, wherein the water-gel ratio is 0.23, and the bone-slurry ratio is 0.26. Uniformly paving the concrete on the river slope surface with the thickness of 40mm, and covering a layer of greening planting soil with the thickness of 30mm on the surface after the concrete is solidified.
Example 3
Municipal sludge with the water content of 46 percent and rice hulls accounting for 10 percent of the weight of the municipal sludge are mixed by a double-roller extrusion technology and then processed into sludge particles with the diameter of 4 mm; uniformly mixing cement, slag micro powder and water according to the proportion of 1:0.3:0.23 for later use; adding 1 part by mass of sludge granules into a disc granulator, enabling the disc granulator to rotate at a constant speed of 18 revolutions per minute, and simultaneously uniformly spraying 4 parts by mass of mixed coating materials on the surfaces of the sludge granules until the diameter of the sludge composite granules reaches about 6 mm; putting the sludge composite particles into steam curing equipment, heating to 40 ℃ at the speed of 10 ℃/h, keeping the temperature at 85 percent, keeping the temperature for 2h, heating to 80 ℃ at the speed of 10 ℃/h, keeping the temperature at 90 percent, keeping the temperature for 3.5h, and finally cooling to room temperature at the speed of 10 ℃/h; cement, slag micro powder, 10-15 mm crushed stone, steamed sludge composite particles, an early strength agent and water according to a ratio of 1:0.3: 4.5: uniformly stirring the mixture according to the mass ratio of 2.5:0.02:0.38, wherein the water-gel ratio is 0.29, and the bone-slurry ratio is 0.24. Uniformly paving the concrete on a road slope with the thickness of 60mm, and covering a layer of greening planting soil with the thickness of 20mm on the surface after the concrete is solidified.
Example 4
Municipal sludge with the water content of 42 percent and sawdust accounting for 8 percent of the weight of the municipal sludge are mixed by a double-roller extrusion technology and then processed into sludge particles with the diameter of 6 mm; uniformly mixing cement, slag micro powder and water according to the proportion of 1:0.5:0.2 for later use; adding 1 part by mass of sludge granules into a disc granulator, enabling the disc granulator to rotate at a constant speed of 20 r/min, and simultaneously uniformly spraying 2.5 parts by mass of mixed coating materials on the surfaces of the sludge granules until the diameter of the sludge composite granules reaches about 8 mm; putting the sludge composite particles into steam curing equipment, heating to 45 ℃ at the speed of 10 ℃/h, keeping the temperature at 85 percent, keeping the temperature for 2h, heating to 90 ℃ at the speed of 10 ℃/h, keeping the temperature at 85 percent, keeping the temperature for 4h, and finally cooling to room temperature at the speed of 10 ℃/h; cement, slag micro powder, crushed stone of 15-20 mm, steamed sludge composite particles, a glue reducing agent and water are mixed according to a ratio of 1:0.5: 5.2: uniformly stirring the mixture according to the mass ratio of 1.8:0.006:0.33, wherein the water-gel ratio is 0.22, and the bone-slurry ratio is 0.26. Uniformly paving the concrete on a road slope with the thickness of 55mm, and covering a layer of green planting soil with the thickness of 25mm on the surface after the concrete is solidified.
Example 5
Municipal sludge with the water content of 45 percent and rice straws accounting for 9 percent of the weight of the municipal sludge are mixed by a double-roll extrusion technology and then processed into sludge particles with the diameter of 3 mm; uniformly mixing cement, slag micro powder and water according to the proportion of 1:0.4:0.2 for later use; adding sludge particles into a disc granulator, enabling the disc granulator to rotate at a constant speed of 18 r/min, and simultaneously uniformly spraying 6 parts by mass of mixed coating materials on the surfaces of the sludge particles until the diameter of the sludge composite particles reaches about 5 mm; placing the sludge composite particles into steam curing equipment, heating to 40 ℃ at the speed of 10 ℃/h, keeping the temperature at 85%, keeping the temperature for 2h, heating to 80 ℃ at the speed of 10 ℃/h, keeping the temperature at 85%, keeping the temperature for 3.5h, and finally cooling to room temperature at the speed of 10 ℃/h; cement, slag micro powder, 10-15 mm broken stone, steamed sludge composite particles, a water reducing agent and water according to a ratio of 1:0.4: 5: stirring uniformly at a ratio of 2.5:0.006:0.35, wherein the water-gel ratio is 0.25, and the bone-slurry ratio is 0.23. Uniformly paving the concrete on a parking lot with the thickness of 80mm, and covering a layer of greening planting soil with the thickness of 20mm on the surface after the concrete is solidified.
Example 6
Municipal sludge with the water content of 40 percent and rice hulls and wood chips which respectively account for 5 percent of the weight of the municipal sludge are mixed by a double-roller extrusion technology and then processed into sludge particles with the diameter of 5 mm; uniformly mixing cement, slag micro powder and water according to the proportion of 1:0.6:0.25 for later use; adding sludge particles into a disc granulator, enabling the disc granulator to rotate at a constant speed of 20 r/min, and simultaneously uniformly spraying 3 parts by mass of mixed coating materials on the surfaces of the sludge particles until the diameter of the sludge composite particles reaches about 7 mm; putting the sludge composite particles into steam curing equipment, heating to 45 ℃ at the speed of 10 ℃/h, keeping the temperature at 85 percent, keeping the temperature for 2h, heating to 90 ℃ at the speed of 10 ℃/h, keeping the temperature at 85 percent, keeping the temperature for 4h, and finally cooling to room temperature at the speed of 10 ℃/h; cement, slag micro powder, crushed stone of 15-20 mm, steamed sludge composite particles, a common water reducing agent, an early strength agent and water in a ratio of 1:0.6: 5.5: 1.5:0.025: stirring uniformly at a ratio of 0.02:0.34, wherein the water-gel ratio is 0.21, and the bone-slurry ratio is 0.28. Uniformly paving the concrete on a parking lot with the thickness of 85mm, and covering a layer of greening planting soil with the thickness of 20mm on the surface after the concrete is solidified.
The compressive strength of the vegetation concrete 28d is detected according to GB/T50081-2019 'test method standard for physical and mechanical properties of concrete', and the porosity is detected according to a method provided by CJJT 253-2016 'technical specification for application of recycled aggregate pervious concrete'.
TABLE 1 results of the vegetation concrete tests of examples 1 to 6
| Examples | 28 days compressive strength/Mpa | Porosity/% | pH value | Peculiar smell |
| Example 1 | 6.2 | 26.8 | 11.5 | Is free of |
| Example 2 | 10.2 | 25.2 | 10.1 | Is free of |
| Example 3 | 10.8 | 27.1 | 10.5 | Is free of |
| Example 4 | 12.3 | 26.5 | 9.8 | Is free of |
| Example 5 | 15.2 | 29.9 | 9.9 | Is free of |
| Example 6 | 21.2 | 24.3 | 9.4 | Is free of |
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (10)
1. The sludge composite particles comprise sludge particles and coating materials for coating the sludge particles; the raw material of the sludge particles comprises sludge and/or biomass material; the raw materials of the coating material comprise cement and/or slag micropowder.
2. The sludge composite granule according to claim 1, wherein the mass ratio of the coating material to the sludge granules is 1 to 7: 1.
3. The sludge composite particle as claimed in claim 1, further comprising any one or more of the following technical features: A1) the sludge is dried sludge with the water content of less than or equal to 50 percent;
A2) the biomass material is selected from one or more of vinegar residue, rice hull, wood dust and straw; the particle size of the biomass material is less than or equal to 3 mm;
A3) the diameter of the sludge particles is 3-6 mm;
A4) the diameter of the sludge composite particles is 5-10 mm;
A5) the biomass material accounts for 0-20% of the weight of the sludge; preferably 5-15%;
A6) the mass ratio of the cement to the slag micro powder is 1:0 to 0.7; preferably 1:0.3 to 0.6;
A7) The specific surface area of the slag micro powder is not less than 420m2/kg。
4. The method for producing the sludge composite particle as claimed in any one of claims 1 to 3, comprising: preparing sludge and/or biomass materials to obtain sludge particles; mixing cement and/or slag micro powder and water, and coating the mixture on the surface of sludge particles to prepare the sludge composite particles.
5. The method for producing sludge composite granules according to claim 4, wherein the produced sludge composite granules are steam-cured under the following conditions: keeping the temperature at 40-50 ℃ and the humidity at 80-95% for 1.5-3 h; heating to 80-90 ℃, and keeping the humidity of 80-95% for 2-5 h; cooling to room temperature.
6. The method of preparing sludge composite particles according to claim 4, wherein the water is 5 to 20%, preferably 10 to 20% of the total weight of the cement and/or slag micropowder.
7. The vegetation concrete is prepared from the raw materials of the sludge composite particles as claimed in claims 1 to 3, and further comprises cement, slag micropowder, broken stone, an additive and water.
8. The vegetation concrete of claim 7, further comprising any one or more of the following technical features:
B1) the mass ratio of the cement, the slag micro powder, the broken stone, the sludge composite particles and the additive is 1: 0-1: 2.5-6.5: 0-5: 0.001-0.03, the water-gel ratio is 0.2-0.35, and the bone-slurry ratio is 0.2-0.3;
B2) the mass ratio of the cement to the slag micro powder to the crushed stone to the sludge composite particles to the admixture is 1: 0.3-0.6: 3-6: 1-3: 0.001-0.03, the water-gel ratio is 0.2-0.3, and the bone-slurry ratio is 0.2-0.3;
B3) the additive is selected from one or more of a water reducing agent, an early strength agent or a glue reducing agent;
B4) the particle size of the crushed stone is 5-20 mm;
B5) the specific surface area of the slag micro powder is not less than 420m2/kg。
9. The method for preparing vegetation concrete according to any one of claims 7 to 8, which comprises uniformly stirring cement, slag micropowder, crushed stone, sludge composite particles, an additive and water.
10. Use of the sludge composite particles as claimed in claims 1 to 3 or the vegetation concrete as claimed in claims 7 to 8 in the fields of slope protection engineering and pavement construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010733580.0A CN111978016B (en) | 2020-07-27 | 2020-07-27 | Sludge composite particles, vegetation concrete and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010733580.0A CN111978016B (en) | 2020-07-27 | 2020-07-27 | Sludge composite particles, vegetation concrete and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111978016A true CN111978016A (en) | 2020-11-24 |
| CN111978016B CN111978016B (en) | 2022-02-22 |
Family
ID=73445780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010733580.0A Active CN111978016B (en) | 2020-07-27 | 2020-07-27 | Sludge composite particles, vegetation concrete and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111978016B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856815A (en) * | 1981-09-30 | 1983-04-04 | 伊藤 靖郎 | Method of adjusting kneading material by hydraulic substance powder such as cement |
| US20090229330A1 (en) * | 2006-06-30 | 2009-09-17 | Janssen Richard Johannes Matheus | Coated fertilizer |
| CN102850077A (en) * | 2012-08-21 | 2013-01-02 | 西南科技大学 | Method for producing sludge-based ecological concrete product |
| CN103496834A (en) * | 2013-09-30 | 2014-01-08 | 河南金谷实业发展有限公司 | Dehydration method for reducing water content of sludge in microbial fermentation way |
| CN107285847A (en) * | 2016-04-13 | 2017-10-24 | 西北农林科技大学 | A kind of sludge-charcoal compoiste fertilizer and preparation method thereof |
| CN108585568A (en) * | 2018-05-29 | 2018-09-28 | 山东建筑大学 | A kind of sludge prepares high quality aglite and method |
| CN110080250A (en) * | 2019-04-29 | 2019-08-02 | 水利部交通运输部国家能源局南京水利科学研究院 | Mud ceramic granules concrete ecological slope protection construction method |
| CN111406546A (en) * | 2020-03-13 | 2020-07-14 | 河海大学 | Ecological slope protection precast block and preparation method and application thereof |
-
2020
- 2020-07-27 CN CN202010733580.0A patent/CN111978016B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856815A (en) * | 1981-09-30 | 1983-04-04 | 伊藤 靖郎 | Method of adjusting kneading material by hydraulic substance powder such as cement |
| US20090229330A1 (en) * | 2006-06-30 | 2009-09-17 | Janssen Richard Johannes Matheus | Coated fertilizer |
| CN102850077A (en) * | 2012-08-21 | 2013-01-02 | 西南科技大学 | Method for producing sludge-based ecological concrete product |
| CN103496834A (en) * | 2013-09-30 | 2014-01-08 | 河南金谷实业发展有限公司 | Dehydration method for reducing water content of sludge in microbial fermentation way |
| CN107285847A (en) * | 2016-04-13 | 2017-10-24 | 西北农林科技大学 | A kind of sludge-charcoal compoiste fertilizer and preparation method thereof |
| CN108585568A (en) * | 2018-05-29 | 2018-09-28 | 山东建筑大学 | A kind of sludge prepares high quality aglite and method |
| CN110080250A (en) * | 2019-04-29 | 2019-08-02 | 水利部交通运输部国家能源局南京水利科学研究院 | Mud ceramic granules concrete ecological slope protection construction method |
| CN111406546A (en) * | 2020-03-13 | 2020-07-14 | 河海大学 | Ecological slope protection precast block and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| KON MY: ""The Eco-Concrete with the Papermaking Sludge"", 《APPLIED MECHANICS, MATERIALS AND MANUFACTURING》 * |
| 孙银秋: ""用于植生混凝土的填隙土研究现状"", 《中国建材科技》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111978016B (en) | 2022-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102515834B (en) | Preparation method of waterworks sludge ceramsites for pretreating micro-polluted water | |
| CN104109038B (en) | The production method of building waste compression Nutrition Soil | |
| CN107935625B (en) | Low-alkalinity vegetation form porous concrete | |
| WO2020073792A1 (en) | Modified sludge and preparation method therefor, and construction method using modified sludge as covering material | |
| CN111847938B (en) | Method for producing environment-friendly ceramsite by utilizing biogas residue hydrothermal carbon | |
| CN110972883A (en) | Copper slag powder-cement composite cementing material ecological concrete and preparation method thereof | |
| CN110862252A (en) | River and lake sludge-based non-fired ultra-light ceramsite as well as preparation method and application thereof | |
| CN112167005A (en) | Preparation method of artificial soil particles based on sludge | |
| CN111387014A (en) | Water and fertilizer retention matrix for roof planting and greening lawn and preparation method thereof | |
| CN112374813B (en) | Ecological planting ceramsite and preparation method thereof | |
| CN117716829A (en) | Method for changing stony desertification land into black land by using solid waste coal gangue phosphogypsum | |
| CN110451876B (en) | Self-repairing concrete with construction waste bricks as carriers and preparation method thereof | |
| CN111978016B (en) | Sludge composite particles, vegetation concrete and preparation method and application thereof | |
| CN115028391B (en) | Preparation method of curing agent for activating and utilizing recycled concrete micro powder | |
| CN114014689B (en) | Low-temperature pore-forming water-storage ceramsite prepared from solid waste and preparation method of ceramsite | |
| CN115849752A (en) | Ecological recycled concrete and preparation method thereof | |
| CN111777388B (en) | Polymer plant-growing concrete containing residual soil and dregs and preparation method thereof | |
| CN113929397A (en) | High-impermeability freeze-thaw-resistance microbial concrete and preparation method thereof | |
| CN113816686A (en) | Method for preparing recycled aggregate pervious concrete by using aqueous permeable crystallization solution | |
| CN110105009B (en) | Water permeable drain pipe | |
| CN112266267A (en) | Light recycled aggregate pervious concrete and preparation method thereof | |
| CN113826528B (en) | High-permeability spongy soil and preparation method and application thereof | |
| CN110171983A (en) | A kind of sintering environmental protection brick and its manufacturing method with industrial sludge production | |
| CN115108782B (en) | Side slope ecological restoration base material taking lake sediment as main material and preparation method thereof | |
| CN113994855B (en) | Application of high-permeability sponge soil in plant maintenance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 200438 room 801, building A7, Lane 1688, Guoquan North Road, Yangpu District, Shanghai Patentee after: SHANGHAI CEO ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 200438 room 401-17, 323 Guoding Road, Yangpu District, Shanghai Patentee before: SHANGHAI CEO ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder |