CN107298557B - concrete production method of construction waste and wastewater - Google Patents
concrete production method of construction waste and wastewater Download PDFInfo
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- CN107298557B CN107298557B CN201710423417.2A CN201710423417A CN107298557B CN 107298557 B CN107298557 B CN 107298557B CN 201710423417 A CN201710423417 A CN 201710423417A CN 107298557 B CN107298557 B CN 107298557B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 30
- 239000002699 waste material Substances 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000012216 screening Methods 0.000 claims abstract description 25
- 239000012634 fragment Substances 0.000 claims abstract description 21
- 239000012535 impurity Substances 0.000 claims abstract description 19
- 239000004568 cement Substances 0.000 claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims abstract description 14
- 239000004575 stone Substances 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 239000004576 sand Substances 0.000 claims abstract description 12
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 229920002678 cellulose Polymers 0.000 claims abstract description 10
- 239000001913 cellulose Substances 0.000 claims abstract description 10
- 239000002956 ash Substances 0.000 claims abstract description 8
- 239000004615 ingredient Substances 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 239000002893 slag Substances 0.000 claims description 26
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000004005 microsphere Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 102100031787 Myosin regulatory light polypeptide 9 Human genes 0.000 description 1
- 101710107065 Myosin regulatory light polypeptide 9 Proteins 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000001172 regenerating effect Effects 0.000 description 1
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- 238000011069 regeneration method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
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Classifications
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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
-
- 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
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
- C04B18/167—Recycled materials, i.e. waste materials reused in the production of the same materials
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/002—Water
- C04B22/0046—Waste slurries or solutions used as gauging water
-
- 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
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The patent relates to the field of concrete and discloses a concrete production method of construction waste and wastewater, which comprises the steps of crushing, namely crushing waste concrete into fragments with the diameter of less than 50 mm; manually or magnetically sorting to remove steel bars and large impurities in the fragments; wind power sorting is carried out to remove ash and light impurities attached to the surfaces of the fragments; crushing and screening, namely putting the fragments into a crusher for crushing, and performing two-stage screening on the crushed recycled aggregate, wherein the aperture of a first-stage screen used for the first-stage screening is 10-25mm, the crushed aggregate is obtained after the first-stage screening, the aperture of a second-stage screen used for the second-stage screening is 5-16mm, and the light coarse aggregate is obtained after the second-stage screening; the ingredients are mixed according to the following components: 34-36 parts of light coarse aggregate, crushed stone, P.O42.5R cement, 12-15 parts of fly ash, 8-10 parts of ceramic sand, 0.7-0.8 part of polyhydroxy salt type water reducing agent, 0.1-0.15 part of cellulose and 20-22 parts of water; mixing, and uniformly mixing all the ingredients to form slurry. This patent is intended to provide a method for preparing lightweight concrete from waste concrete and waste water.
Description
Technical Field
the invention relates to the field of concrete.
background
The light concrete is prepared with light sand, light coarse aggregate, cement, water, etc. and has dry apparent density not higher than 1950kg/m 3. When the strength grade of the light concrete adopted by the heat-insulating layers of the layered floor slabs and the roofs is not lower than LC15 grade, a cement concrete protective layer is not required to be arranged between the heat-insulating layers and the surface layers. The full light concrete is usually used as a building floor ground and layered floor slab heat insulation system, not only is one-step forming carried out in the construction process, but also two procedures of laying a steel wire mesh sheet and a fine stone concrete protective layer are omitted, and meanwhile, the building floor ground and layered floor slab heat insulation system has the advantages of bearing and heat insulation performance and greatly saving the cost.
the Chinese patent application with publication number CN105084833A discloses a high-strength heat-insulating light concrete and a preparation method and application thereof, wherein the light concrete adopts floating beads, ceramic hollow microspheres, ceramsite and ceramic sand as light coarse aggregates, but the floating beads, the ceramic hollow microspheres, the ceramsite and the ceramic sand have higher selling price, so that the prepared light concrete has higher selling price, and the popularization and the application of the light concrete are not facilitated, and the floating beads and the ceramic hollow microspheres have lower density and are easy to float upwards.
However, a great deal of waste concrete is generated in the construction, maintenance or demolition process of the current social construction engineering, a great deal of waste water is generated when the concrete tank car is flushed in the concrete transportation process, and the treatment of the waste concrete and the waste water becomes an urgent problem. The conventional method is to discard or bury the waste concrete as garbage and directly discharge the waste water, which is undoubtedly a waste and destruction of land resources.
Disclosure of Invention
the invention aims to provide a concrete production method of construction waste and wastewater, which is used for preparing all-light concrete by utilizing waste concrete and wastewater.
The concrete production method of the construction waste and the wastewater in the scheme comprises the following steps:
step 1: crushing, namely crushing the waste concrete into fragments with the diameter of less than 50 mm;
step 2: manually or magnetically sorting to remove steel bars and large impurities in the fragments;
And step 3: wind power sorting is carried out to remove ash and light impurities attached to the surfaces of the fragments;
And 4, step 4: crushing and screening, namely putting the fragments into a crusher for crushing, and performing two-stage screening on the crushed recycled aggregate, wherein the aperture of a first-stage screen used for the first-stage screening is 10-25mm, the crushed aggregate is obtained after the first-stage screening, the aperture of a second-stage screen used for the second-stage screening is 5-16mm, and the light coarse aggregate is obtained after the second-stage screening;
And 5: mixing 50-55 parts by weight of light coarse aggregate and 78-82 parts by weight of crushed stone with the following components in parts by weight: 34-36 parts of P, O42.5R cement, 12-15 parts of fly ash, 8-10 parts of ceramic sand, 0.7-0.8 part of Point-400S type water reducing agent, 0.1-0.15 part of cellulose and 20-22 parts of water;
Step 6: mixing, and uniformly mixing all the ingredients to form slurry.
The technical principle and the beneficial effects of the scheme are as follows: when the waste concrete is subjected to a recycling treatment for recycling, it is necessary to remove reinforcing bars, impurities, and the like. The waste concrete is crushed into fragments smaller than 50mm in advance, so that reinforcing steel bars and impurities can be conveniently removed from the waste concrete. And (3) obtaining the recyclable concrete fragments after the two-stage separation in the step (2) and the step (3).
the concrete fragments are crushed by using a crusher, the pressure of the crusher in the crushing process is that firstly, the concrete slag is peeled from natural crushed stone to obtain regenerated crushed stone, secondly, the concrete fragments which can not be peeled are crushed into fragments which can pass through a primary screen and can be directly used as the crushed stone, and the concrete slag generated in the crusher falls into a secondary screen through the primary screen for screening, so that particles with the particle size of 5-16mm are screened out to be used as light coarse aggregate.
then the concrete is prepared according to the following components in parts by weight: 78-82 parts of crushed stone, 50-55 parts of light coarse aggregate, 34-36 parts of P.O42.5R cement, 12-15 parts of fly ash, 8-10 parts of ceramic sand, 0.7-0.8 part of Point-400S type water reducing agent, 0.1-0.15 part of cellulose and 20-22 parts of water. Then the ingredients are evenly mixed into slurry. In the pouring process of the heat-insulating layer, the heat-insulating layer needs to be quickly formed, so that the P.O42.5R early strength cement can be used for quickly forming the concrete, and the market demand is better met. The recycled crushed stone and the light coarse aggregate are adopted, so that the waste concrete can be recycled, the damage to the environment is reduced, and the floating phenomenon of the light coarse aggregate in the all-light concrete in the prior art can be effectively avoided due to the fact that the density of the light coarse aggregate is close to that of slurry. The workability of the all-light concrete can be improved by adopting the Point-400S type water reducing agent, the hardening shrinkage can be effectively reduced, and the volume stability and the durability of the heat-insulating layer are improved. The cellulose can effectively control the microcracks caused by the factors such as the plastic shrinkage, the drying shrinkage, the temperature change and the like of the concrete, prevent and inhibit the formation and the development of the concrete primary cracks, greatly improve the anti-cracking and anti-permeability performance and the anti-abrasion performance of the concrete, increase the toughness of the concrete and further prolong the service life of the concrete.
the light and coarse concrete aggregate made by the scheme has no floating phenomenon and has the apparent density of 1270-1350Kg/m3The concrete thermal insulation material is only two thirds of the apparent density of common concrete, can effectively reduce the load on the thermal insulation layer structure, has a thermal conductivity coefficient less than 0.25W/(m.K), and has good thermal insulation effect.
and further, collecting the ash powder generated by pneumatic separation in the step 3 by using a cloth bag to be used as the fly ash. The method collects the ash, which is a byproduct generated in the process of regenerating the waste concrete, so that the recycling rate of the waste concrete is improved, and the ash is prevented from flying into the air to pollute the air.
further, in the step 5, the preferable weight parts of the components are as follows: 79.5 parts of crushed stone, 52 parts of light coarse aggregate, 35 parts of P.O42.5R cement, 15 parts of fly ash, 8 parts of ceramic sand, 0.75 part of Point-400S type water reducing agent, 0.12 part of cellulose and 21 parts of water. The apparent density of the prepared all-light concrete is 1300Kg/m3The thermal conductivity coefficient is 0.22W/(m.K), and the heat-insulating material is more suitable for pouring of heat-insulating layers.
Further, in step 5, the water used is recycled water, the recycled water is made through a recycled water treatment tank, the recycled water treatment tank comprises a barrel-shaped treatment tank body, a diaphragm plate is arranged in the treatment tank body and divides the treatment tank body into an upper chamber and a lower chamber, a water inlet pipe is obliquely inserted downwards along the tangential direction on the side wall of the upper chamber, the water inlet pipe is communicated with the upper chamber, a water outlet is formed in the center of the diaphragm plate, a slag removing cavity is arranged on the diaphragm plate below the water outlet and is communicated with the slag removing cavity, an annular cavity is formed between the outer wall of the slag removing cavity and the inner wall of the treatment tank body, a weep hole is formed in the side wall of the slag removing cavity and is communicated with the slag removing cavity and the annular cavity, a flow baffle plate is arranged in the annular cavity, a slag discharging channel for discharging slag is arranged at the bottom of the slag removing cavity and extends out of the treatment. Injecting the waste water obtained after washing the concrete tank car from the water inlet pipe, flushing the waste water into the upper chamber under the action of gravity, wherein the water inlet pipe is obliquely arranged downwards along the tangential direction of the upper chamber, the waste water rotates at the water outlet of the upper chamber under the action of self impact force to form a vortex, impurities in the waste water are gathered towards the center of the upper chamber under the action of the vortex, the impurities fall into the deslagging cavity together with the waste water, most of the impurities are remained in the deslagging cavity, the rest impurities flow into the annular cavity from the weeping hole under the action of self centrifugal force and impact force, the flow baffle plate in the annular cavity decelerates the waste water which flows in a rotating manner, then the waste water is statically precipitated in the annular cavity, the rest impurities fall into the bottom of the annular cavity, the waste water after the impurities are removed is positioned above the impurities, and the waste water without the impurities can be discharged from the water outlet positioned in the middle part of the side wall of, the waste water after impurity removal is used for mixing the light concrete. The waste water treated by the regeneration water treatment tank is obtained by washing the concrete tank truck, and the additive, the cement slurry and the like in the original concrete are dissolved in the waste water, so that the use amount of the additive and the cement in the preparation of the full light concrete is favorably reduced, and the production cost is favorably reduced.
Further, the upper chamber is in an inverted cone shape. The wastewater is more convenient to form a vortex in the upper chamber.
The Point-400S type water reducing agent is a retarding water reducing agent, and can ensure that the all-light concrete has high water reducing rate, good fluidization, small slump loss with time, no segregation and no bleeding.
Drawings
FIG. 1 is a schematic structural diagram of a recycled water treatment tank in a concrete production method of construction waste and wastewater according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises an upper chamber 1, a lower chamber 2, a partition plate 3, a water inlet pipe 4, a water outlet 5, a slag removing cavity 6, an annular cavity 7, a flow baffle plate 8, a liquid seepage hole 9, a slag discharging channel 10 and a water outlet 11.
example one
the concrete production method of the construction waste and the wastewater comprises the following steps:
step 1: crushing, namely crushing the waste concrete into fragments with the diameter of less than 50 mm;
Step 2: manually or magnetically sorting to remove steel bars and large impurities in the fragments;
And step 3: wind power sorting is carried out to remove ash and light impurities attached to the surfaces of the fragments;
And 4, step 4: crushing and screening, namely putting the fragments into a crusher for crushing, and carrying out two-stage screening on the crushed recycled aggregate, wherein the aperture of a first-stage screen used for the first-stage screening is 16mm, the crushed aggregate is obtained after the first-stage screening, the aperture of a second-stage screen used for the second-stage screening is 8mm, and the light coarse aggregate is obtained after the second-stage screening;
And 5: mixing 52 parts by weight of light coarse aggregate and 79.5 parts by weight of crushed stone with the following components in parts by weight: P.O42.5R cement 35, fly ash 15, ceramic sand 8, Point-400S type water reducing agent 0.75, cellulose 0.12 and water 21;
wherein the water is the regenerated water prepared by treating the wastewater in a regenerated water treatment tank, the regenerated water treatment tank comprises a barrel-shaped treatment tank body, a diaphragm plate 3 is arranged in the treatment tank body, the diaphragm plate 3 divides the treatment tank body into a lower chamber 2 and an upper chamber 1 in an inverted cone shape, a water inlet pipe 4 is obliquely inserted downwards along the tangential direction on the side wall of the upper chamber 1, the water inlet pipe 4 is communicated with the upper chamber 1, a water outlet 5 is arranged at the center of the diaphragm plate 3, a slag removing cavity 6 is arranged on the diaphragm plate 3 below the water outlet 5, the water outlet 5 is communicated with the slag removing cavity 6, an annular cavity 7 is formed between the outer wall of the slag removing cavity 6 and the inner wall of the treatment tank body, a liquid seepage hole 9 is arranged on the side wall of the slag removing cavity 6, the liquid seepage hole 9 is communicated with the slag removing cavity 6 and the annular cavity 7, a flow baffle plate 8 is arranged in the annular cavity 7, a slag discharging channel, a water outlet 11 is formed in the middle of the side wall of the lower chamber 2, and regenerated water flowing out of the water outlet 11 is taken out for proportioning;
step 6: mixing, mixing all the materials into slurry, and making into light concrete.
Example two
the only difference from the first embodiment is that: the preferable weight parts of the components in the ingredients are as follows: crushed stone 78, light coarse aggregate 50, P.O42.5R cement 34, fly ash 12, ceramic sand 8, Point-400S type water reducing agent 0.7, cellulose 0.1 and water 20.
EXAMPLE III
the only difference from the first embodiment is that: the preferable weight parts of the components in the ingredients are as follows: crushed stone 82, light coarse aggregate 55, P.O42.5R cement 36, fly ash 15, ceramic sand 10, Point-400S type water reducing agent 0.8, cellulose 0.12 and water 22.
The all-lightweight concrete prepared in the first, second and third examples was subjected to performance testing according to the national republic of China "lightweight aggregate concrete technical Specification JGJ 51-2002", and the test results are shown in Table 1:
TABLE 1
As can be seen from Table 1, the all-light concrete prepared by the method reaches the grade of LC20, and the apparent density is only 1274-1345Kg/m3the heat-insulating material has good heat-insulating effect and is very suitable for pouring the heat-insulating layer of a building.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (4)
1. The concrete production method of the construction waste and the wastewater is characterized in that: the method comprises the following steps:
Step 1: crushing, namely crushing the waste concrete into fragments with the diameter of less than 50 mm;
Step 2: manually or magnetically sorting to remove steel bars and large impurities in the fragments;
And step 3: wind power sorting is carried out to remove ash and light impurities attached to the surfaces of the fragments;
And 4, step 4: crushing and screening, namely putting the fragments into a crusher for crushing, and performing two-stage screening on the crushed recycled aggregate, wherein the aperture of a first-stage screen used for the first-stage screening is 10-25mm, the crushed aggregate is obtained after the first-stage screening, the aperture of a second-stage screen used for the second-stage screening is 5-16mm, and the light coarse aggregate is obtained after the second-stage screening;
And 5: mixing 50-55 parts by weight of light coarse aggregate and 78-82 parts by weight of crushed stone with the following components in parts by weight: 34-36 parts of P, O42.5R cement, 12-15 parts of fly ash, 8-10 parts of ceramic sand, 0.7-0.8 part of Point-400S type water reducing agent, 0.1-0.15 part of cellulose and 20-22 parts of water;
In the step 5, the used water is regenerated water, the regenerated water is prepared by a regenerated water treatment tank, the regenerated water treatment tank comprises a barrel-shaped treatment tank body, a transverse partition plate is arranged in the treatment tank body and divides the treatment tank body into an upper chamber and a lower chamber, a water inlet pipe is obliquely inserted downwards along the tangential direction on the side wall of the upper chamber, the water inlet pipe is communicated with the upper chamber, a water outlet is formed in the center of the partition plate, a slag removing cavity is arranged on the partition plate below the water outlet and is communicated with the slag removing cavity, an annular cavity is formed between the outer wall of the slag removing cavity and the inner wall of the treatment tank body, a weep hole is formed in the side wall of the slag removing cavity and is communicated with the slag removing cavity and the annular cavity, a flow baffle is arranged in the annular cavity, a slag discharging channel for discharging slag is arranged at the bottom of the slag removing cavity and extends out of;
Step 6: mixing, and uniformly mixing all the ingredients to form slurry.
2. The method for producing concrete of construction waste and wastewater according to claim 1, characterized in that: collecting the ash powder generated by pneumatic separation in the step 3 by using a cloth bag to be used as fly ash.
3. the method for producing concrete of construction waste and wastewater according to claim 1, characterized in that: in the step 5, the preferable weight parts of the components are as follows: 79.5 parts of crushed stone, 52 parts of light coarse aggregate, 35 parts of P.O42.5R cement, 15 parts of fly ash, 8 parts of ceramic sand, 0.75 part of Point-400S type water reducing agent, 0.12 part of cellulose and 21 parts of water.
4. The method for producing concrete of construction waste and wastewater according to claim 1, characterized in that: the upper chamber is in an inverted cone shape.
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| CN108358488B (en) * | 2018-05-07 | 2020-10-02 | 深圳大学 | Preparation method for recycling UHPFRC (ultra high performance concrete) crushed aggregate into recycled concrete aggregate |
| CN110028294A (en) * | 2019-05-30 | 2019-07-19 | 四川功予名图文设计有限公司 | A kind of regeneration time gently concrete and its application |
| CN114737809B (en) * | 2022-02-28 | 2023-09-15 | 合肥工业大学 | Large plastic concrete combined garbage pool |
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