CN113372057A - Preparation method of nap-covered recycled concrete - Google Patents
Preparation method of nap-covered recycled concrete Download PDFInfo
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- CN113372057A CN113372057A CN202110620334.9A CN202110620334A CN113372057A CN 113372057 A CN113372057 A CN 113372057A CN 202110620334 A CN202110620334 A CN 202110620334A CN 113372057 A CN113372057 A CN 113372057A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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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
- 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
- C04B20/02—Treatment
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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
- 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
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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- 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
Abstract
The invention discloses a preparation method of a recycled concrete with a velvet covering layer, belonging to the technical field of recycled concrete, the invention can slightly corrode the surface of recycled aggregate by dilute acid solution, directly corrode tiny pores on the surface into larger pores, then inlay granular iron powder, can improve the strength of the aggregate and simultaneously improve the impermeability, then introduce a velvet covering chain, one magnetic end of the velvet covering chain actively enters the pores by virtue of the adsorption effect between the velvet covering chain and the iron powder, partially dissolves residual moisture in the pores, shows viscosity to perform a certain bonding effect, and simultaneously triggers the expansion effect to be combined with the pores on the surface of the recycled aggregate, thereby forming a velvet covering action on the surface of the recycled aggregate, on one hand, the roughness of the surface of the recycled aggregate is improved, which is beneficial to the combination with cement with high contact area, on the other hand, the velvet covering chain can be pre-buried in the connecting surface of the recycled aggregate and the cement, thereby remarkably improving crack resistance.
Description
Technical Field
The invention relates to the technical field of recycled concrete, in particular to a preparation method of flocking type recycled concrete.
Background
In recent years, the world building industry has entered a high-speed development stage. The occupation of natural resources and the negative impact on the environment caused by concrete as the largest man-made material also lead to the discussion of sustainable development problems. The amount of waste concrete removed annually in the world, waste concrete from new buildings, and waste concrete discharged from concrete plants, prefabrication plants, etc. is enormous. Meanwhile, the discharge amount of the waste concrete is expected to increase along with the acceleration of the urbanization process worldwide, and the removal and the modification of the original building are increased day by day. The traditional treatment method of the waste concrete is mainly to transport the waste concrete to be stacked or buried in the suburb, so that not only is a large amount of transportation cost spent and secondary pollution caused to the environment, but also a large amount of precious land resources are occupied, and the waste of natural resources is also great.
The development and application of the recycled aggregate concrete solve the problems of difficult treatment of a large amount of waste concrete and the gradual deterioration of ecological environment caused by the difficult treatment of the waste concrete on one hand; on the other hand, the construction waste recycled aggregate is used for replacing the natural aggregate, so that the consumption of the natural aggregate in the construction industry can be reduced, the exploitation of natural gravels is reduced, the problem that the natural aggregate is increasingly deficient and the ecological environment is damaged by the exploitation of a large amount of gravels is fundamentally solved, the living environment of human is protected, and the requirement of sustainable development is met.
In the prior art, construction waste formed by waste building concrete is crushed to form recycled concrete for recycling, so that a large amount of construction waste is treated, and construction materials are saved. However, when the waste concrete is used as the aggregate of the recycled concrete, the interface pores are larger than those of the natural aggregate, and the water absorption rate of the recycled concrete is higher, so that the aggregate and the cement are not tightly combined, and the recycled concrete using the waste concrete as the aggregate is easy to crack.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a preparation method of pile-coated recycled concrete, which can slightly corrode the surface of recycled aggregate by dilute acid solution, directly corrode tiny pores on the surface into larger pores, then inlay granular iron powder, improve the strength of the aggregate and simultaneously improve the impermeability, then introduce a pile-coated chain, actively enter the pores by virtue of the adsorption effect between the magnetic end of the pile-coated chain and the iron powder, partially dissolve residual moisture in the pores, show viscosity to perform a certain bonding effect, trigger the expansion effect to be combined with the pores on the surface of the recycled aggregate, thereby forming pile-coated action on the surface of the recycled aggregate, on one hand, improving the roughness of the surface of the recycled aggregate to facilitate the combination with cement with high contact area, on the other hand, can be pre-embedded in the connecting surface of the recycled aggregate and the cement by virtue of the action of the pile-coated chain, thereby remarkably improving crack resistance.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A preparation method of the pile-coated recycled concrete comprises the following steps:
s1, crushing the waste concrete into 5-40mm recycled aggregate, and removing iron impurities and non-iron impurities;
s2, uniformly spraying a dilute acid solution on the recycled aggregate to corrode the recycled aggregate, so that surface porous holes are formed, and then washing with water and carrying out surface air drying;
s3, taking granular iron powder and recycled aggregate to be extruded and mixed, forcing part of the iron powder to be embedded into holes of the recycled aggregate, and then recycling redundant iron powder;
s4, gradually and dispersedly adding the covering chain and mixing the covering chain with the recycled aggregate, forcing one end of the covering chain to enter the hole for combination through the magnetic attraction effect between the covering chain and the iron powder, and dissolving the covering chain under the action of residual moisture in the hole;
s5, fully drying the recycled aggregate and recycling the redundant covering chain, and mixing ordinary portland cement, natural fine aggregate, fly ash, a polycarboxylic acid water reducing agent, sodium gluconate and water to obtain the recycled concrete.
Furthermore, the down-covered chain comprises anti-crack fiber bundles and magnetic sleeve balls which are covered and connected to one ends of the anti-crack fiber bundles, the anti-crack fiber bundles can improve the surface roughness of the recycled aggregate and can also improve the crack resistance of the joint of the recycled aggregate and cement, and the magnetic sleeve balls can drive the anti-crack fiber bundles to actively enter holes in the surface of the aggregate by utilizing the adsorption effect between the magnetic sleeve balls and iron powder.
Further, anti-crack fiber bundle is including binding end, diolame cover and many dispersion ends, the diolame cover cladding is close to the one end surface of magnetism sleeve ball in the end of bundling, the end of bundling extends to magnetism sleeve ball inner, and dispersion end evenly connects in the one end that the end of bundling is located magnetism sleeve ball, and the end of bundling has the anti-crack effect of high strength, and the diolame cover then avoids moisture to get into inside in advance from magnetism sleeve ball department and dissolves to improve the intensity of junction, dispersion end can improve under the dispersed state with the cohesion in regeneration aggregate hole.
Furthermore, one end of the anti-crack fiber bundle is twisted and bundled to obtain a bundled end, the other end of the anti-crack fiber bundle is in a free dispersion state to obtain a dispersed end, then the bundled end and the dispersed end are coated with a coating sleeve, the bundled end has high anti-crack strength after being twisted and bundled, and the dispersed end is easy to disperse and combine with holes.
Furthermore, be connected with elasticity expansion silk between the dispersion end, and elasticity expansion silk is in compression state, it is connected with the magnetism extreme point to inlay on the elasticity expansion silk, after the cover ball part of magnetism is inhaled dissolves, rely on the elasticity expansion effect of elasticity expansion silk, force dispersion end to disperse rapidly, can impel on the one hand to dissolve the material and distribute and bond, on the other hand can rely on the expansion of dispersion end in the hole to avoid anti-crack fiber bundle to drop by accident, can also realize the multiple spot of high strength with the cement that gets into at the back and be connected, the magnetism extreme point has certain magnetism and comes to keep the adsorption with the iron powder, and the magnetism of magnetism extreme point also can not lead to covering fine hair chain mutual adsorption so that the excess is not strong yet.
Further, the mantle ball is inhaled to magnetism includes outer shell and water soluble core, water soluble core inlays to be connected in outer shell and keeps away from the one end of a bunch end, and the cross-section edge line of outer shell and water soluble core is major arc and minor arc respectively, the end of gathering a bunch extends to outer shell inner, the dispersion end is inlayed and is connected in water soluble core inner, and outer shell plays the effect of holding to water soluble core on the one hand, and on the other hand can improve the degree of filling to the hole, and water soluble core has viscosity after dissolving and bonds temporarily to outer cladding has certain extrusion expansion effect after dispersion end dispersion to make the mantle ball of magnetism be inhaled and be difficult for droing from the hole.
Furthermore, the outer casing is made of a light porous material, the water-soluble core is made of a water-soluble starch material, the outer casing is light and easy to migrate, later cement is allowed to permeate, and the water-soluble core can be dissolved in cold water and shows certain viscosity to provide temporary bonding effect.
Furthermore, the outer casing also comprises a plurality of anti-seepage broken filaments, the anti-seepage broken filaments uniformly cover the outer surface of the water soluble core, the anti-seepage broken filaments can prevent the water soluble core from contacting residual moisture on the surface of the recycled aggregate in advance to be dissolved in an initial state, a certain waterproof effect is achieved, and meanwhile, after the anti-seepage broken filaments enter the holes, the moisture is more, and the anti-seepage broken filaments can be used for dissolving the water soluble core.
Further, the dilute acid solution in the step S2 is one of dilute sulfuric acid, dilute nitric acid, and dilute hydrochloric acid solution.
Further, the raw materials in the step S5 are in parts by weight: 75-85 parts of ordinary portland cement, 50-60 parts of natural fine aggregate, 90-100 parts of recycled aggregate, 8-10 parts of fly ash, 1-2 parts of polycarboxylic acid water reducing agent, 8-12 parts of sodium gluconate and 35-45 parts of water.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) according to the scheme, the surface of the recycled aggregate can be slightly corroded by a dilute acid solution, micro pores on the surface of the recycled aggregate are directly corroded into larger holes, then granular iron powder is inlaid, the impermeability can be improved while the strength of the aggregate is improved, then a down covering chain is introduced, one magnetic end of the down covering chain actively enters the holes by virtue of the adsorption effect between the down covering chain and the iron powder, and is partially dissolved in residual moisture in the holes, the adhesion is shown to perform a certain bonding effect, and the expansion effect is triggered to be combined with the holes on the surface of the recycled aggregate, so that down covering action on the surface of the recycled aggregate is formed, on one hand, the roughness of the surface of the recycled aggregate is improved, the combination of high contact area with cement is facilitated, on the other hand, the down covering chain can be pre-buried in the connecting surface of the recycled aggregate and the cement by virtue of the effect, and the crack resistance is obviously improved.
(2) The down-covered chain comprises anti-crack fiber bundles and a magnetic sleeve ball coated and connected to one end of the anti-crack fiber bundles, the anti-crack fiber bundles can improve the surface roughness of the recycled aggregate and can also improve the crack resistance of the joint of the recycled aggregate and cement, and the magnetic sleeve ball can drive the anti-crack fiber bundles to actively enter holes in the surface of the aggregate by utilizing the adsorption effect between the magnetic sleeve ball and iron powder.
(3) Anti-crack fiber bundle is including the end of restrainting of collection, capsule cover and many dispersion ends, capsule cover cladding is close to the one end surface of magnetism sleeve ball in the end of restrainting, the end of restrainting extends to magnetism sleeve ball inner, and dispersion end evenly connects in the one end that the end of restrainting is located magnetism sleeve ball, the end of restrainting has the anti-crack effect of high strength, the capsule cover then avoids moisture to get into inside from magnetism sleeve ball department of inhaling in advance and dissolves, and improve the intensity of junction, dispersion end department can improve under the dispersed state with the cohesion in regeneration aggregate hole.
(4) The anti-crack fiber bundle is formed by twisting and bundling one end of a plurality of glass fibers to obtain a bundled end, and obtaining a dispersed end in a free dispersion state at the other end, then a coating sleeve is taken to coat the joint of the bundled end and the dispersed end, the bundled end has high anti-crack strength after being twisted and bundled, and the dispersed end is easy to disperse and combine with holes.
(5) Be connected with elasticity expansion silk between the end of dispersing, and elasticity expansion silk is in compression state, it is connected with the magnetism extreme point to inlay on the elasticity expansion silk, after the cover ball part of magnetism is inhaled to magnetism dissolves, rely on the elasticity expansion effect of elasticity expansion silk, force the end of dispersing to disperse rapidly, can impel dissolving the material to distribute and bond on the one hand, on the other hand can rely on the expansion of end of dispersing in the hole to avoid anti-crack fiber bundle to drop by accident, can also realize the multiple spot connection of high strength with the cement that gets into at the back, the magnetism extreme point has certain magnetism and comes to keep the adsorption with the iron powder, and the magnetism of magnetism extreme point also can not lead to covering the fine hair chain to adsorb each other too strongly.
(6) Magnetic sleeve ball includes outer shell and water soluble core, water soluble core inlays to be connected and keeps away from the one end that the end was restrainted to the collection in outer shell, and the cross-section edge line of outer shell and water soluble core is major arc and minor arc respectively, end extends to outer shell inner tied in a bundle, the dispersion end is inlayed and is connected in water soluble core inner, outer shell plays the effect of holding to water soluble core on the one hand, on the other hand can improve the degree of filling to the hole, water soluble core has viscosity after dissolving and bonds temporarily, and have certain extrusion expansion effect to outer shell after dispersion end dispersion, thereby make magnetic sleeve ball be difficult for droing from the hole.
(7) The outer casing is made of a light porous material, the water-soluble core is made of a water-soluble starch material, the outer casing is light and easy to migrate, later cement is allowed to permeate, and the water-soluble core can be dissolved in cold water and shows certain viscosity to provide temporary bonding effect.
(8) The outer wrapping shell also comprises a plurality of anti-seepage broken filaments, the anti-seepage broken filaments uniformly cover the outer surface of the water soluble core, the anti-seepage broken filaments can prevent the water soluble core from contacting residual moisture on the surface of the recycled aggregate in advance to be dissolved in an initial state, a certain waterproof effect is achieved, and meanwhile, after the anti-seepage broken filaments enter the holes, more moisture can be obtained, and the anti-seepage broken filaments can be used for dissolving the water soluble core.
Drawings
FIG. 1 is a schematic flow diagram of recycled aggregate processing according to the present invention;
FIG. 2 is a schematic structural diagram of a down-covering chain according to the present invention;
FIG. 3 is a schematic structural view of a crack resistant fiber bundle of the present invention;
FIG. 4 is a schematic view of the magnetic sleeve ball in a normal state;
FIG. 5 is a schematic view of the magnetic sleeve ball according to the present invention in a dissolved state.
The reference numbers in the figures illustrate:
1 anti-crack fiber bundle, 11 bundling ends, 12 film-coating sleeves, 13 dispersing ends, 2 magnetic sleeve balls, 21 outer wrapping shells, 22 water-soluble cores, 23 anti-seepage broken filaments, 3 elastic expansion filaments and 4 magnetic end points.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, a method for preparing recycled concrete coated with flock includes the following steps:
s1, crushing the waste concrete into 5-40mm recycled aggregate, and removing iron impurities and non-iron impurities;
s2, uniformly spraying a dilute acid solution on the recycled aggregate to corrode the recycled aggregate, so that surface porous holes are formed, and then washing with water and carrying out surface air drying;
s3, taking granular iron powder and recycled aggregate to be extruded and mixed, forcing part of the iron powder to be embedded into holes of the recycled aggregate, and then recycling redundant iron powder;
s4, gradually and dispersedly adding the covering chain and mixing the covering chain with the recycled aggregate, forcing one end of the covering chain to enter the hole for combination through the magnetic attraction effect between the covering chain and the iron powder, and dissolving the covering chain under the action of residual moisture in the hole;
s5, fully drying the recycled aggregate and recycling the redundant covering chain, and mixing ordinary portland cement, natural fine aggregate, fly ash, a polycarboxylic acid water reducing agent, sodium gluconate and water to obtain the recycled concrete.
The dilute acid solution in the step S2 is one of dilute sulfuric acid, dilute nitric acid, and dilute hydrochloric acid solution.
The raw materials in the step S5 are as follows according to parts by weight: 75-85 parts of ordinary portland cement, 50-60 parts of natural fine aggregate, 90-100 parts of recycled aggregate, 8-10 parts of fly ash, 1-2 parts of polycarboxylic acid water reducing agent, 8-12 parts of sodium gluconate and 35-45 parts of water.
Referring to fig. 2, the covered chain includes an anti-crack fiber bundle 1 and a magnetic sleeve ball 2 covering and connected to one end of the anti-crack fiber bundle 1, the anti-crack fiber bundle 1 improves the roughness of the surface of the recycled aggregate, and at the same time, the crack resistance of the joint of the recycled aggregate and cement can be improved, and the magnetic sleeve ball 2 can drive the anti-crack fiber bundle 1 to actively enter the hole on the surface of the aggregate by utilizing the adsorption effect between the magnetic sleeve ball and the iron powder.
Referring to fig. 3, the anti-crack fiber bundle 1 includes a bundle collecting end 11, a coated sleeve 12 and a plurality of dispersing ends 13, the coated sleeve 12 is coated on an outer surface of one end of the bundle collecting end 11 close to the magnetic sleeve ball 2, the bundle collecting end 11 extends to an inner end of the magnetic sleeve ball 2, the dispersing ends 13 are uniformly connected to one end of the bundle collecting end 11 located at the magnetic sleeve ball 2, the bundle collecting end 11 has a high-strength anti-crack effect, the coated sleeve 12 prevents moisture from entering the magnetic sleeve ball 2 to dissolve in advance, and improves strength of a joint, and the dispersing ends 13 can improve binding force with holes of recycled aggregate when in a dispersed state.
Referring to fig. 3, one end of the anti-crack fiber bundle 1 is twisted and bundled by a plurality of glass fibers to obtain a bundled end 11, the other end is in a free dispersion state to obtain a dispersed end 13, and then the bundled end 11 is coated at the joint of the bundled end 11 and the dispersed end 13 by a coating sleeve 12, so that the bundled end 11 has high anti-crack strength after being twisted and bundled, and the dispersed end 13 is easy to be dispersed and combined with holes.
Referring to fig. 4-5, an elastic expansion wire 3 is connected between the dispersing ends 13, the elastic expansion wire 3 is in a compressed state, the magnetic end points 4 are embedded and connected on the elastic expansion wire 3, after the magnetic sleeve ball 2 is partially dissolved, the dispersing ends 13 are forced to be rapidly dispersed by means of the elastic expansion effect of the elastic expansion wire 3, on one hand, the dissolved materials can be promoted to be distributed and bonded, on the other hand, the anti-crack fiber bundles 1 can be prevented from accidentally falling off by means of expansion of the dispersing ends 13 in holes, high-strength multipoint connection can be achieved with cement entering from the rear, the magnetic end points 4 have certain magnetism to keep an adsorption effect with iron powder, and the magnetism of the magnetic end points 4 is not too strong to cause mutual adsorption of covering floss chains.
The outer casing 21 is made of light porous material, the water soluble core 22 is made of water soluble starch material, the outer casing 21 is light and easy to migrate, the later cement is allowed to permeate, and the water soluble core 22 can be dissolved in cold water and shows certain viscosity to provide temporary bonding.
The outer wrapping shell 21 further comprises a plurality of anti-seepage broken filaments 23, the anti-seepage broken filaments 23 evenly cover the outer surface of the water soluble core 22, the anti-seepage broken filaments 23 can prevent the water soluble core 22 from contacting residual moisture on the surface of the recycled aggregate in advance to be dissolved in an initial state, a certain waterproof effect is achieved, meanwhile, moisture is more after the anti-seepage broken filaments 23 enter holes, and the water soluble core 22 can be dissolved through the anti-seepage broken filaments 23.
The invention can slightly corrode the surface of the recycled aggregate by dilute acid solution, directly corrode tiny pores on the surface of the recycled aggregate into larger holes, then inlay granular iron powder, improve the impermeability while improving the strength of the aggregate, then introduce a flock covering chain, wherein one magnetic end of the flock covering chain actively enters the holes by virtue of the adsorption effect between the granular iron powder and the iron powder, partially dissolves residual moisture in the holes, shows viscosity to perform certain bonding effect, and simultaneously triggers the expansion effect to be combined with the holes on the surface of the recycled aggregate, thereby forming a flock covering action on the surface of the recycled aggregate.
The above are merely preferred embodiments of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (10)
1. A preparation method of pile-coated recycled concrete is characterized by comprising the following steps: the method comprises the following steps:
s1, crushing the waste concrete into 5-40mm recycled aggregate, and removing iron impurities and non-iron impurities;
s2, uniformly spraying a dilute acid solution on the recycled aggregate to corrode the recycled aggregate, so that surface porous holes are formed, and then washing with water and carrying out surface air drying;
s3, taking granular iron powder and recycled aggregate to be extruded and mixed, forcing part of the iron powder to be embedded into holes of the recycled aggregate, and then recycling redundant iron powder;
s4, gradually and dispersedly adding the covering chain and mixing the covering chain with the recycled aggregate, forcing one end of the covering chain to enter the hole for combination through the magnetic attraction effect between the covering chain and the iron powder, and dissolving the covering chain under the action of residual moisture in the hole;
s5, fully drying the recycled aggregate and recycling the redundant covering chain, and mixing ordinary portland cement, natural fine aggregate, fly ash, a polycarboxylic acid water reducing agent, sodium gluconate and water to obtain the recycled concrete.
2. The method for preparing pile-coated recycled concrete according to claim 1, wherein the method comprises the following steps: the down-covered chain comprises an anti-crack fiber bundle (1) and a magnetic sleeve ball (2) covered and connected to one end of the anti-crack fiber bundle (1).
3. The method for preparing pile-coated recycled concrete according to claim 2, wherein the method comprises the following steps: anti-crack tow (1) is including bundling end (11), diolame cover (12) and many disperse end (13), diolame cover (12) cladding is close to the one end surface of magnetism sleeve ball (2) in bundling end (11), bundling end (11) extend to magnetism sleeve ball (2) inner, and disperse end (13) evenly connect in bundling end (11) and lie in the one end of magnetism sleeve ball (2).
4. The method for preparing pile-coated recycled concrete according to claim 3, wherein the method comprises the following steps: one end of each anti-crack fiber bundle (1) is twisted and bundled to obtain a bundling end (11), the other end of each anti-crack fiber bundle is in a free dispersion state to obtain a dispersion end (13), and then a coating sleeve (12) is taken to coat the joint of the bundling end (11) and the dispersion end (13).
5. The method for preparing pile-coated recycled concrete according to claim 3, wherein the method comprises the following steps: an elastic expansion wire (3) is connected between the dispersing ends (13), the elastic expansion wire (3) is in a compressed state, and a magnetic end point (4) is embedded and connected on the elastic expansion wire (3).
6. The method for preparing pile-coated recycled concrete according to claim 3, wherein the method comprises the following steps: magnetic attraction sleeve ball (2) comprises an outer casing (21) and a water-soluble core (22), the water-soluble core (22) is embedded and connected to one end, away from the bundling end (11), of the outer casing (21), the cross-section edge lines of the outer casing (21) and the water-soluble core (22) are respectively a major arc and a minor arc, the bundling end (11) extends to the inner end of the outer casing (21), and the dispersion end (13) is embedded and connected to the inner end of the water-soluble core (22).
7. The method for preparing pile-coated recycled concrete according to claim 1, wherein the method comprises the following steps: the outer casing (21) is made of a light porous material, and the water-soluble core (22) is made of a water-soluble starch material.
8. The method for preparing pile-coated recycled concrete according to claim 6, wherein the method comprises the following steps: the outer wrapping shell (21) further comprises a plurality of anti-seepage broken filaments (23), and the anti-seepage broken filaments (23) uniformly cover the outer surface of the water soluble core (22).
9. The method for preparing pile-coated recycled concrete according to claim 1, wherein the method comprises the following steps: the dilute acid solution in the step S2 is one of dilute sulfuric acid, dilute nitric acid, and dilute hydrochloric acid solution.
10. The method for preparing pile-coated recycled concrete according to claim 1, wherein the method comprises the following steps: the raw materials in the step S5 are as follows according to parts by weight: 75-85 parts of ordinary portland cement, 50-60 parts of natural fine aggregate, 90-100 parts of recycled aggregate, 8-10 parts of fly ash, 1-2 parts of polycarboxylic acid water reducing agent, 8-12 parts of sodium gluconate and 35-45 parts of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113352456A (en) * | 2021-05-11 | 2021-09-07 | 谢长安 | Preparation process of anti-fracture high-stability elevator counterweight block |
| CN113387642A (en) * | 2021-06-07 | 2021-09-14 | 刘再挺 | Preparation method of reamed impervious recycled concrete |
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| CN113387642A (en) * | 2021-06-07 | 2021-09-14 | 刘再挺 | Preparation method of reamed impervious recycled concrete |
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