CN111732405A - Concrete regenerated by utilizing building concrete waste mud - Google Patents
Concrete regenerated by utilizing building concrete waste mud Download PDFInfo
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- CN111732405A CN111732405A CN202010572476.8A CN202010572476A CN111732405A CN 111732405 A CN111732405 A CN 111732405A CN 202010572476 A CN202010572476 A CN 202010572476A CN 111732405 A CN111732405 A CN 111732405A
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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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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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
- 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
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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
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- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a concrete regenerated by utilizing building concrete waste slurry, which comprises the following components: 120-180 parts of P.O42.5 cement; 250-350 parts of mineral powder; 200-300 parts of C-S-H waste slurry; 1100-1300 parts of stone dust powder; 6-7 parts of a coagulant, 0.5-1 part of an air entraining agent; 1-3 parts of a rust inhibitor; wherein the solid content of the C-S-H waste slurry is controlled to be more than 45 percent, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, and the stone dust is I area fine aggregate. According to the invention, through the optimization test of the recycled concrete bricks with different use amounts of the C-S-H waste slurry, solid content, glue material use amount, admixture and coagulant, beneficial exploration is made for solving the problem of waste residues in the production process of commercial concrete, the full-chain closed loop of the production of the commercial concrete without waste discharge is realized, and the sustainable production of the commercial concrete as a green building material in the true sense is effectively promoted.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a method for regenerating concrete by using building concrete waste slurry.
Background
In urban and rural construction processes of China, industrial and civil buildings, municipal engineering, hydraulic engineering and sea salt engineering need a large amount of concrete materials every year, and a large amount of untreated solid wastes are left in the concrete preparation process. In 2017, the annual production of concrete in China is 18.68 million cubes, and the waste amount reaches about 1800 million cubes by calculating 0.01 cubic solid waste per ten thousand cubic concrete units.
In practice, most commercial concrete production enterprises adopt a cleaning method to separate out part of sandstone aggregate for recycling so as to reduce solid waste discharge, but the C-S-H slurry mud precipitated by cleaning is not subjected to harmless treatment and recycling, and the environmental pollution is serious because the C-S-H slurry mud cannot be recovered in a green way. The related data show that the C-S-H dehydration phase of the concrete precipitation slurry is inactive at normal temperature, the P.O42.5 cement molding mortar test piece is replaced by 30 percent of substitution amount, the 28-day compressive strength is only 37.3 percent of the standard test piece strength, and the C-S-H dehydration phase does not have secondary hydration capability at normal temperature.
Disclosure of Invention
(1) Technical scheme
The invention provides a method for regenerating concrete by using building concrete waste mud, aiming at overcoming the defects of the prior art, wherein the concrete regenerated by using the building concrete waste mud comprises the following components:
120-180 parts of P.O42.5 cement;
250-350 parts of mineral powder;
200-300 parts of C-S-H waste slurry;
100-200 parts of steel slag;
700-750 parts of stone dust powder;
300-350 parts of urban construction sludge dry powder:
6-7 parts of a coagulant;
0.5-1 part of air entraining agent;
1-3 parts of a rust inhibitor;
wherein the solid content of the C-S-H waste slurry is controlled to be more than 45 percent, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, and the particle size of the urban construction sludge dry powder is 50-150 nm.
The preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
When testing the strength of concrete, the invention aims to meet the requirement of the N10.0 non-bearing solid building block, thereby realizing the full-chain closed loop of the solid waste discharge of the concrete, promoting the harmless, waste-free discharge and green ecological development of the concrete industry, and meeting the sustainable and recyclable development of the industry.
In a preferred embodiment, the accelerator comprises one or a combination of two or more of calcium chloride, phosphogypsum and water glass, and the calcium chloride, phosphogypsum and water glass are all technical grade reagents.
In order to improve the workability, water retention and cohesiveness of the concrete mixture and improve the concrete fluidity, a large number of uniformly distributed air entraining agents with closed and stable micro-bubbles are introduced in the mixing process of the concrete mixture, and the air entraining agents comprise rosin resin air entraining agents, saponin air entraining agents, alkyl arene sulfonic acid air entraining agents, fatty alcohol sulfonate air entraining agents and petroleum sulfonate air entraining agents.
In order to provide a certain rust inhibiting effect to the concrete, the rust inhibitor comprises a calcium nitrite rust inhibitor, a grade fatty acid ammonium rust inhibitor and a phosphate rust inhibitor.
As a preferred embodiment, the recycled concrete by using the construction concrete waste mud comprises the following components: 150 parts of P.O42.5 cement, 300 parts of mineral powder, 275 parts of C-S-H waste slurry, 1180 parts of stone dust, 6.75 parts of a coagulant, 0.5 part of an air entraining agent and 2 parts of a rust inhibitor, and more preferably 150 parts of P.O42.5 cement, 300 parts of mineral powder, 275 parts of C-S-H waste slurry, 1180 parts of stone dust, 6.75 parts of calcium chloride, 0.5 part of an air entraining agent and 2 parts of a rust inhibitor.
(2) Advantageous effects
The invention has the beneficial effects that: compared with the prior art, the invention makes beneficial exploration on waste residues in the production process of commercial concrete through the optimization test of the recycled concrete bricks with different use amounts, solid contents, glue material use amounts, admixture and coagulant mixing amounts of the C-S-H waste slurry, realizes full-chain closed loop production of the commercial concrete without waste discharge, and effectively promotes the green building material sustainable production of the commercial concrete in the true sense.
Drawings
FIG. 1 is a graph showing the effect of different C-S-H waste slurry contents on the strength of the components.
Detailed Description
The technical solutions in the embodiments of the present invention are further clearly and completely described below with reference to the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 200Kg of waste C-S-H pulp, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the C-S-H waste slurry accounts for 10.93 percent of the total amount, the test C-S-H waste slurry is taken from each stirring station, the slurry is a mixture of the C-S-H waste slurry and sand cleaning powder and slurry, the solid content of the C-S-H waste slurry is controlled to be 45 to 50 percent through filtrate or filter pressing, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, the particle size of the urban construction sludge dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
Example two
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 210Kg of C-S-H waste slurry, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the C-S-H waste slurry accounts for 11.42 percent of the total amount, the test C-S-H waste slurry is taken from each stirring station, the slurry is a mixture of the C-S-H waste slurry and sand cleaning powder and slurry, the solid content of the C-S-H waste slurry is controlled to be 45 to 50 percent through filtrate or filter pressing, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, the particle size of the urban construction sludge dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
EXAMPLE III
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 220Kg of C-S-H waste slurry, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the C-S-H waste slurry accounts for 11.90 percent of the total amount, the test C-S-H waste slurry is taken from each stirring station, the slurry is a mixture of the C-S-H waste slurry and sand cleaning powder and slurry, the solid content of the C-S-H waste slurry is controlled to be 45-50 percent through filtrate or filter pressing, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, the particle size of the urban construction sludge dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
Example four
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 230Kg of waste C-S-H pulp, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the waste C-S-H pulp accounts for 12.37% of the total amountThe waste C-S-H slurry is taken from each stirring station, the slurry is a mixture of the waste C-S-H slurry and sand stone cleaning powder and slurry, the solid content of the waste C-S-H slurry is controlled to be 45-50% through filtrate or filter pressing, the rest is slurry with water, S95 grade mineral powder is adopted as the mineral powder, stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, the particle size of the urban construction sludge dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
EXAMPLE five
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 240Kg of C-S-H waste slurry, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the C-S-H waste slurry accounts for 12.84 percent of the total amount, the test C-S-H waste slurry is taken from each stirring station, the slurry is a mixture of the C-S-H waste slurry and sand cleaning powder and slurry, the solid content of the C-S-H waste slurry is controlled to be 45 to 50 percent through filtrate or filter pressing, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, and the urban construction sludgeThe particle size of the dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
EXAMPLE six
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 250Kg of C-S-H waste slurry, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the C-S-H waste slurry accounts for 13.30 percent of the total amount, the test C-S-H waste slurry is taken from each stirring station, the slurry is a mixture of the C-S-H waste slurry and sand cleaning powder and slurry, the solid content of the C-S-H waste slurry is controlled to be 45-50 percent through filtrate or filter pressing, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, the particle size of the urban construction sludge dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
EXAMPLE seven
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 260Kg of waste C-S-H pulp, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the C-S-H waste slurry accounts for 13.76 percent of the total amount, the test C-S-H waste slurry is taken from each stirring station, the slurry is a mixture of the C-S-H waste slurry and sand cleaning powder and slurry, the solid content of the C-S-H waste slurry is controlled to be 45 to 50 percent through filtrate or filter pressing, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, the particle size of the urban construction sludge dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
Example eight
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 270Kg of waste C-S-H pulp, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the C-S-H waste slurry accounts for 14.22 percent of the total amount, the test C-S-H waste slurry is taken from each stirring station, the slurry is a mixture of the C-S-H waste slurry and sand cleaning powder and slurry, the solid content of the C-S-H waste slurry is controlled to be 45 to 50 percent through filtrate or filter pressing, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, the particle size of the urban construction sludge dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
Example nine
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 280Kg of C-S-H waste slurry, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the C-S-H waste slurry accounts for 14.67 percent of the total amount, the test C-S-H waste slurry is taken from each stirring station, the slurry is a mixture of the C-S-H waste slurry and sand cleaning powder and slurry, the solid content of the C-S-H waste slurry is controlled to be 45 to 50 percent through filtrate or filter pressing, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, the particle size of the urban construction sludge dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
Example ten
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 290Kg of C-S-H waste slurry, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the waste C-S-H slurry accounts for 15.11% of the total amount, the waste C-S-H slurry for test is obtained from each stirring station, the slurry is a mixture of the waste C-S-H slurry and sand cleaning powder slurry, and the filtrate or pressure is passedThe solid content of the C-S-H waste slurry is controlled to be 45-50 percent through filtering, the rest is slurry with water, mineral powder adopts S95 grade mineral powder, stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, the particle size of the urban construction sludge dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: drying industrial and mining or building sludge waste residues through a sludge drying bed, and then putting the sludge drying bed into a horizontal ball mill to crush and grind the sludge waste residues into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
EXAMPLE eleven
The embodiment discloses recycled concrete by utilizing building concrete waste mud and a preparation method thereof, wherein the recycled concrete by utilizing the building concrete waste mud comprises the following components:
150Kg of conch brand P.O42.5 cement, 300Kg of mineral powder, 300Kg of C-S-H waste slurry, 745Kg of stone chip powder, 136Kg of steel slag, 299Kg of urban construction sludge dry powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor.
Wherein the C-S-H waste slurry accounts for 15.55 percent of the total amount, the test C-S-H waste slurry is taken from each stirring station, the slurry is a mixture of the C-S-H waste slurry and sand cleaning powder and slurry, the solid content of the C-S-H waste slurry is controlled to be 45 to 50 percent through filtrate or filter pressing, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, the particle size of the urban construction sludge dry powder is 50-150 nm, and the preparation method of the urban construction sludge dry powder comprises the following steps: will pollute industrial and mining or buildingAnd drying the sludge waste residue by a sludge drying bed, and then putting the sludge waste residue into a horizontal ball mill to be crushed and ground into primary dry powder with the particle size of 50-150 nm.
In order to solve the problem of recycling the C-S-H waste slurry, the embodiment combines a sludge solidification technology. The components are measured and then sent into a stirrer to be mixed into slurry, the slurry is prepared into test blocks of 150mm multiplied by 150mm according to the conventional concrete compressive strength test block preparation and maintenance method, the maintenance is carried out for 28 days, and the compressive strength is measured. The test reference proportion is carried out according to JGJ/T98 'design rule for mixing proportion of masonry mortar', and the embodiment meets the compressive strength required by GB50203 'acceptance criteria for masonry structure engineering construction quality' and GB/T8239 'ordinary concrete small-sized block' N10.0 non-bearing solid block.
In the tests of examples 1 to 11, the contents of the C-S-H waste slurry in the test recycled concrete are 10.93%, 11.42%, 11.90%, 12.37%, 12.84%, 13.30%, 13.76%, 14.22%, 14.67%, 15.11%, 15.55% respectively by the controlled variable method, and the compressive strengths thereof are as listed in the following table:
the experiment shows that the technology for preparing the concrete solid building block by regenerating the C-S-H waste slurry is feasible, and the concrete regenerated by the building concrete waste slurry disclosed by the embodiment has the following economic and effective mixture ratio: 150Kg of cement, 300Kg of mineral powder, 275Kg of waste C-S-H slurry, 1180Kg of waste stone powder, 6.75Kg of calcium chloride, 0.5Kg of rosin resin air entraining agent and 2Kg of calcium nitrite rust inhibitor. The C-S-H waste slurry can be harmlessly treated by preparing recycled concrete blocks, and the C-S-H waste slurry and a waste water recycling technology and an aggregate recycling technology can realize the solid-waste-free closed-loop production of fresh concrete, so that the preparation of concrete materials really realizes green ecology.
The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. The concrete regenerated by utilizing the building concrete waste slurry is characterized by comprising the following components:
120-180 parts of P.O42.5 cement;
250-350 parts of mineral powder;
200-300 parts of C-S-H waste slurry;
100-200 parts of steel slag;
700-750 parts of stone dust powder;
300-350 parts of urban construction sludge dry powder:
6-7 parts of a coagulant;
0.5-1 part of air entraining agent;
1-3 parts of a rust inhibitor;
wherein the solid content of the C-S-H waste slurry is controlled to be more than 45 percent, the rest is slurry with water, the mineral powder adopts S95 grade mineral powder, the stone dust is I area fine aggregate, the fineness modulus is 3.0, the methylene blue index is 2.0, and the bulk density is 1455kg/m3The particle size of the steel slag is 2-10 mm, and the particle size of the urban construction sludge dry powder is 50-150 nm.
2. The concrete recycled by using the building concrete waste mud as claimed in claim 1, wherein the coagulant comprises one or more of calcium chloride, phosphogypsum and water glass, and the calcium chloride, the phosphogypsum and the water glass are all industrial-grade reagents.
3. The concrete recycled by using the building concrete waste mud as claimed in claim 1, wherein the air-entraining agent comprises rosin resin air-entraining agent, saponin air-entraining agent, alkyl aromatic hydrocarbon sulfonic acid air-entraining agent, fatty alcohol sulfonate air-entraining agent and petroleum sulfonate air-entraining agent.
4. The recycled concrete using the building concrete waste mud as set forth in claim 1, wherein the rust inhibitor comprises calcium nitrite rust inhibitor, ammonium salt of aliphatic acid, and phosphate rust inhibitor.
5. The recycled concrete of claim 2, wherein the recycled concrete of the building concrete waste mud comprises the following components: 150 parts of P.O42.5 cement, 300 parts of mineral powder, 275 parts of C-S-H waste slurry, 1180 parts of stone dust, 6.75 parts of a coagulant, 0.5 part of an air entraining agent and 2 parts of a rust inhibitor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114232648A (en) * | 2021-12-06 | 2022-03-25 | 北京建工土木工程有限公司 | PBA method pilot tunnel inner supporting and protecting structure and construction method thereof |
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| CN102887676A (en) * | 2012-09-04 | 2013-01-23 | 青岛磊鑫混凝土有限公司 | C30 concrete prepared from high-concentration concrete waste slurry water |
| CN110467381A (en) * | 2019-08-22 | 2019-11-19 | 四川建筑职业技术学院 | A kind of method that sludge collaboration processing mixing plant waste prepares building material |
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| JPH10167778A (en) * | 1996-12-09 | 1998-06-23 | Nippon Kemitatsuku Kk | Treatment of cement-containing waste mud, hydraulic dried powder and its utilization |
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| CN110467381A (en) * | 2019-08-22 | 2019-11-19 | 四川建筑职业技术学院 | A kind of method that sludge collaboration processing mixing plant waste prepares building material |
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