CN116041030B - Permeable concrete block and preparation method thereof - Google Patents
Permeable concrete block and preparation method thereof Download PDFInfo
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- CN116041030B CN116041030B CN202211550531.9A CN202211550531A CN116041030B CN 116041030 B CN116041030 B CN 116041030B CN 202211550531 A CN202211550531 A CN 202211550531A CN 116041030 B CN116041030 B CN 116041030B
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/041—Aluminium silicates other than clay
-
- 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
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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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
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of concrete materials, in particular to a permeable concrete block and a preparation method thereof, wherein the permeable concrete block is prepared from the following raw materials in parts by weight: 80-120 parts of cement, 20-30 parts of auxiliary gel materials, 40-50 parts of blast furnace granulated slag, 40-50 parts of coarse tailings, 250-280 parts of fine tailings, 2-5 parts of super absorbent resin, 3-6 parts of an exciting agent, 10-20 parts of glass fiber, 0-5 parts of an additive and 100-120 parts of water.
Description
Technical Field
The invention relates to the field of concrete materials, in particular to a permeable concrete block and a preparation method thereof.
Background
In recent years, the concrete block is widely applied to the projects of building engineering, decoration, municipal administration, road, water conservancy, ports, gardens, airports and the like, and the application of the concrete block is expanded from the single structure function to the functions of heat preservation, heat insulation, sound absorption, water permeability and the like and the combination thereof, so that the value of the concrete block is multiplied.
The permeable concrete block is generally used in urban road construction and landscaping construction, and when the traditional permeable concrete block is manufactured, no fine aggregate or only a small amount of fine aggregate is added, and pores are naturally formed by coarse aggregate and cement.
Disclosure of Invention
The invention aims to: aiming at the technical problems, the invention provides a permeable concrete block and a preparation method thereof.
The technical scheme adopted is as follows:
a permeable concrete block is prepared from the following raw materials in parts by weight:
80-120 parts of cement, 20-30 parts of auxiliary gel material, 40-50 parts of blast furnace granulated slag, 40-50 parts of coarse tailing, 250-280 parts of fine tailing, 2-5 parts of super absorbent resin, 3-6 parts of excitant, 10-20 parts of glass fiber, 0-5 parts of additive and 100-120 parts of water.
Further, the super absorbent resin is poly (AA-HPMA-aMPS)/nano cellulose aerogel composite super absorbent resin.
Further, the preparation method of the poly (AA-HPMA-aMPS)/nano cellulose aerogel composite super absorbent resin comprises the following steps:
mixing acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid, regulating the neutralization degree by using a NaOH solution, adding hydroxypropyl methacrylate, uniformly mixing to obtain a mixed monomer solution, mixing an initiator, N' -methylenebisacrylamide, nano cellulose aerogel and water, uniformly dispersing by ultrasonic oscillation, adding the mixed monomer solution into the mixed monomer solution, uniformly stirring, performing microwave polymerization for 1-5min, filtering out the obtained product, washing, drying and crushing.
Further, the mass ratio of the acrylic acid to the 2-acrylamide-2-methylpropanesulfonic acid to the hydroxypropyl methacrylate is 6-10:3-5:1.
further, the preparation method of the nanocellulose aerogel comprises the following steps:
adding nano cellulose into water, dispersing by ultrasonic, dripping into calcium chloride solution, standing for 18-24h after dripping to obtain gel, replacing with alcohol solvent, and vacuum freeze-drying.
Further, the alcohol solvent is isopropanol or tert-butanol.
Further, the auxiliary gel material comprises fly ash, silica fume and mullite.
Further, the mass ratio of the fly ash to the silica fume to the mullite is 3-5:3-5:1.
further, the exciting agent comprises the following components in percentage by mass: 8-10 of sodium hydroxide and sodium silicate.
The invention also provides a preparation method of the permeable concrete block, which comprises the following steps:
mixing cement, blast furnace granulated slag, coarse tailings, fine tailings, auxiliary gel materials, an exciting agent and glass fibers uniformly, adding the super absorbent resin into water, pre-soaking for 3-6min, mixing with a mixture and an additive uniformly, pouring the obtained mortar, demoulding, and curing under standard curing conditions to a specified age.
The invention has the beneficial effects that:
the invention provides a permeable concrete block, the super absorbent resin is used as aggregate to be directly stirred to form mortar after being absorbed in advance, the mortar is gradually dehydrated and contracted in the curing process, holes are finally formed in the concrete block, during the dehydration process, secondary hydration enhancement is realized by peripheral cement gel, the formed holes can be supported by nano cellulose aerogel after dehydration, a porous structure with uniform hole size, distribution and interval can be formed in the concrete block by the technology, the porous structure has good permeable effect and excellent mechanical property, and an auxiliary gel material composed of fly ash, silica fume and mullite can react with calcium hydroxide generated by cement hydration to generate more CSH gel and hydrated aluminate, so that the microstructure of the concrete block can be improved, the strength and quality of the concrete block are improved, and the permeable concrete block prepared by the technology has good mechanical property and water permeability and can meet general engineering requirements.
Detailed Description
The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention. The technology not mentioned in the present invention refers to the prior art.
And (3) cement: PO42.5 composite Portland Cement available from Heng Yang red lion Cement Co., ltd;
fly ash: purchased from Sanyi technology development Co., ltd;
silica fume: purchased from Hunan Sijin building materials Co., ltd;
mullite: 200-400 mesh, purchased from Ci xi Hua Limited liability company in Hunan province;
blast furnace granulated slag: purchased from sanhong building materials limited, hunan;
coarse tailings: quartz tailings with the particle size of 3-5mm are produced by a company tailings dry discharge branch factory;
fine tailings: quartz tailings with the grain diameter of 0.085-0.15mm are produced by a company tailing dry discharge sorting factory;
high water absorption resin: self-making;
sodium hydroxide: purchased from the commercial chemical industry trade company of the Heng yang city;
water glass: purchased from Heng yang suburban Ming water glass plant;
glass fiber: purchased from hongsen glass fiber limited, of Hunan province;
polycarboxylate water reducer: purchased from the company of Hunan Xinhua yang building materials, inc.;
water: tap water.
Example 1:
a permeable concrete block is prepared from the following raw materials in parts by weight:
100 parts of cement, 10 parts of fly ash, 10 parts of silica fume, 2 parts of mullite, 45 parts of blast furnace granulated slag, 40 parts of coarse tailings, 260 parts of fine tailings, 3.5 parts of super absorbent resin, 0.5 part of sodium hydroxide, 4 parts of sodium silicate, 15 parts of glass fiber, 2 parts of polycarboxylate superplasticizer and 110 parts of water.
Wherein the super absorbent resin is poly (AA-HPMA-aMPS)/nano cellulose aerogel composite super absorbent resin, and the preparation method is as follows:
adding 10g of nano cellulose into 80mL of water, performing ultrasonic dispersion for 40min, dropwise adding into 0.2mol/L of calcium chloride solution, standing for 24h after dripping, performing solvent replacement with tert-butyl alcohol for 24h, changing tert-butyl alcohol every 6h during the process, putting the obtained gel into a refrigerator, freezing for 1h, transferring into a vacuum freeze dryer, performing vacuum freeze drying for 48h to obtain nano cellulose aerogel, mixing 80g of acrylic acid and 45g of 2-acrylamide-2-methylpropanesulfonic acid, regulating the neutralization degree to 70% by using NaOH solution, adding 10g of hydroxypropyl methacrylate, uniformly mixing to obtain mixed monomer solution, mixing 0.8g of initiator APS, 0.5g of N, N' -methylenebisacrylamide, 6g of nano cellulose aerogel and 25mL of water, performing ultrasonic oscillation to uniformly disperse, adding into the mixed monomer solution, uniformly stirring, performing 400W microwave polymerization for 3.5min, filtering out, washing, drying and crushing the obtained product.
The preparation method of the permeable concrete block comprises the following steps:
mixing cement, blast furnace granulated slag, coarse tailings, fine tailings, fly ash, silica fume, mullite, sodium hydroxide, sodium silicate, water glass and glass fiber uniformly, adding the super absorbent resin into water, pre-soaking for 5min, mixing with the mixture and the polycarboxylate water reducer, uniformly stirring, pouring the obtained mortar, molding, demolding, and curing under standard curing conditions until the curing reaches 28d age.
Example 2:
a permeable concrete block is prepared from the following raw materials in parts by weight:
120 parts of cement, 10 parts of fly ash, 10 parts of silica fume, 2 parts of mullite, 50 parts of blast furnace granulated slag, 50 parts of coarse tailings, 280 parts of fine tailings, 5 parts of super absorbent resin, 0.5 part of sodium hydroxide, 4 parts of water glass, 20 parts of glass fiber, 5 parts of polycarboxylate superplasticizer and 120 parts of water.
Wherein the super absorbent resin is poly (AA-HPMA-aMPS)/nano cellulose aerogel composite super absorbent resin, and the preparation method is as follows:
adding 10g of nano cellulose into 80mL of water, performing ultrasonic dispersion for 40min, dropwise adding into 0.2mol/L of calcium chloride solution, standing for 24h after dripping, performing solvent replacement with tert-butyl alcohol for 24h, changing tert-butyl alcohol every 6h during the process, putting the obtained gel into a refrigerator, freezing for 1h, transferring into a vacuum freeze dryer, performing vacuum freeze drying for 48h to obtain nano cellulose aerogel, mixing 100g of acrylic acid and 50g of 2-acrylamide-2-methylpropanesulfonic acid, regulating the neutralization degree to 70% by using NaOH solution, adding 10g of hydroxypropyl methacrylate, uniformly mixing to obtain mixed monomer solution, mixing 0.8g of initiator APS, 0.5g of N, N' -methylenebisacrylamide, 6g of nano cellulose aerogel and 25mL of water, performing ultrasonic oscillation to uniformly disperse, adding into the mixed monomer solution, uniformly stirring, filtering out the obtained product, washing, drying and crushing.
The preparation method of the permeable concrete block comprises the following steps:
mixing cement, blast furnace granulated slag, coarse tailings, fine tailings, fly ash, silica fume, mullite, sodium hydroxide, sodium silicate, water glass and glass fiber uniformly, adding the super absorbent resin into water, pre-soaking for 6min, mixing with the mixture and the polycarboxylate water reducer, uniformly stirring, pouring the obtained mortar, molding, demolding, and curing under standard curing conditions until the curing reaches 28d age.
Example 3:
a permeable concrete block is prepared from the following raw materials in parts by weight:
80 parts of cement, 10 parts of fly ash, 10 parts of silica fume, 2 parts of mullite, 40 parts of blast furnace granulated slag, 40 parts of coarse tailings, 250 parts of fine tailings, 2 parts of super absorbent resin, 0.5 part of sodium hydroxide, 4 parts of water glass, 10 parts of glass fiber, 1 part of polycarboxylate water reducer and 100 parts of water.
Wherein the super absorbent resin is poly (AA-HPMA-aMPS)/nano cellulose aerogel composite super absorbent resin, and the preparation method is as follows:
adding 10g of nano cellulose into 80mL of water, performing ultrasonic dispersion for 40min, dropwise adding into 0.2mol/L of calcium chloride solution, standing for 18h after dripping, performing solvent replacement with tert-butyl alcohol for 24h, changing tert-butyl alcohol every 6h during the process, putting the obtained gel into a refrigerator, freezing for 1h, transferring into a vacuum freeze dryer, performing vacuum freeze drying for 48h to obtain nano cellulose aerogel, mixing 60g of acrylic acid and 30g of 2-acrylamide-2-methylpropanesulfonic acid, regulating the neutralization degree to 70% by using NaOH solution, adding 10g of hydroxypropyl methacrylate, uniformly mixing to obtain mixed monomer solution, mixing 0.8g of initiator APS, 0.5g of N, N' -methylenebisacrylamide, 6g of nano cellulose aerogel and 25mL of water, performing ultrasonic oscillation to uniformly disperse, adding into the mixed monomer solution, uniformly stirring, filtering out the obtained product, washing, drying and crushing.
The preparation method of the permeable concrete block comprises the following steps:
mixing cement, blast furnace granulated slag, coarse tailings, fine tailings, fly ash, silica fume, mullite, sodium hydroxide, sodium silicate, water glass and glass fiber uniformly, adding the super absorbent resin into water, pre-soaking for 3min, mixing with the mixture and the polycarboxylate water reducer, uniformly stirring, pouring the obtained mortar, molding, demolding, and curing under standard curing conditions until the curing reaches 28d age.
Example 4:
a permeable concrete block is prepared from the following raw materials in parts by weight:
120 parts of cement, 10 parts of fly ash, 10 parts of silica fume, 2 parts of mullite, 40 parts of blast furnace granulated slag, 50 parts of coarse tailings, 250 parts of fine tailings, 5 parts of super absorbent resin, 0.5 part of sodium hydroxide, 4 parts of water glass, 10 parts of glass fiber, 5 parts of polycarboxylate superplasticizer and 100 parts of water.
Wherein the super absorbent resin is poly (AA-HPMA-aMPS)/nano cellulose aerogel composite super absorbent resin, and the preparation method is as follows:
adding 10g of nano cellulose into 80mL of water, performing ultrasonic dispersion for 40min, dropwise adding into 0.2mol/L of calcium chloride solution, standing for 24h after dripping, performing solvent replacement with tert-butyl alcohol for 24h, changing tert-butyl alcohol every 6h during the process, putting the obtained gel into a refrigerator, freezing for 1h, transferring into a vacuum freeze dryer, performing vacuum freeze drying for 48h to obtain nano cellulose aerogel, mixing 60g of acrylic acid and 50g of 2-acrylamide-2-methylpropanesulfonic acid, regulating the neutralization degree to 70% by using NaOH solution, adding 10g of hydroxypropyl methacrylate, uniformly mixing to obtain mixed monomer solution, mixing 0.8g of initiator APS, 0.5g of N, N' -methylenebisacrylamide, 6g of nano cellulose aerogel and 25mL of water, performing ultrasonic oscillation to uniformly disperse, adding into the mixed monomer solution, uniformly stirring, filtering out the obtained product, washing, drying and crushing.
The preparation method of the permeable concrete block comprises the following steps:
mixing cement, blast furnace granulated slag, coarse tailings, fine tailings, fly ash, silica fume, mullite, sodium hydroxide, sodium silicate, water glass and glass fiber uniformly, adding the super absorbent resin into water, pre-soaking for 6min, mixing with the mixture and the polycarboxylate water reducer, uniformly stirring, pouring the obtained mortar, molding, demolding, and curing under standard curing conditions until the curing reaches 28d age.
Example 5:
a permeable concrete block is prepared from the following raw materials in parts by weight:
80 parts of cement, 10 parts of fly ash, 10 parts of silica fume, 2 parts of mullite, 50 parts of blast furnace granulated slag, 40 parts of coarse tailings, 280 parts of fine tailings, 2 parts of super absorbent resin, 0.5 part of sodium hydroxide, 4 parts of water glass, 20 parts of glass fiber, 2 parts of polycarboxylate superplasticizer and 120 parts of water.
Wherein the super absorbent resin is poly (AA-HPMA-aMPS)/nano cellulose aerogel composite super absorbent resin, and the preparation method is as follows:
adding 10g of nano cellulose into 80mL of water, performing ultrasonic dispersion for 40min, dropwise adding into 0.2mol/L of calcium chloride solution, standing for 18h after dripping, performing solvent replacement with tert-butyl alcohol for 24h, changing tert-butyl alcohol every 6h during the process, putting the obtained gel into a refrigerator, freezing for 1h, transferring into a vacuum freeze dryer, performing vacuum freeze drying for 48h to obtain nano cellulose aerogel, mixing 100g of acrylic acid and 30g of 2-acrylamide-2-methylpropanesulfonic acid, regulating the neutralization degree to 70% by using NaOH solution, adding 10g of hydroxypropyl methacrylate, uniformly mixing to obtain mixed monomer solution, mixing 0.8g of initiator APS, 0.5g of N, N' -methylenebisacrylamide, 6g of nano cellulose aerogel and 25mL of water, performing ultrasonic oscillation to uniformly disperse, adding into the mixed monomer solution, uniformly stirring, filtering out the obtained product, washing, drying and crushing.
The preparation method of the permeable concrete block comprises the following steps:
mixing cement, blast furnace granulated slag, coarse tailings, fine tailings, fly ash, silica fume, mullite, sodium hydroxide, sodium silicate, water glass and glass fiber uniformly, adding the super absorbent resin into water, pre-soaking for 3min, mixing with the mixture and the polycarboxylate water reducer, uniformly stirring, pouring the obtained mortar, molding, demolding, and curing under standard curing conditions until the curing reaches 28d age.
Comparative example 1:
substantially the same as in example 1, except that the super absorbent resin of the present invention was replaced with a commercially available super absorbent resin (Yanxing chemical industry).
Comparative example 2:
substantially the same as in example 1, except that the super absorbent resin was prepared without adding the nanocellulose aerogel.
Performance test:
the water permeable concrete blocks prepared in examples 1 to 5 and comparative examples 1 to 2 of the present invention were used as test samples;
the test method refers to the detection of compressive strength, flexural strength and splitting tensile strength of a sample according to GB/T50081-2019 'test method Standard for physical and mechanical properties of concrete';
impact resistance test reference standard CECS13:2009 Standard for fiber concrete test method, preparing a cake-shaped sample with the diameter of 150mm and the thickness of (63+/-3) mm, designing the test height to 5000mm, selecting a steel impact hammer with the weight of 5kg, taking out the well-maintained sample in advance, airing the sample during the test, placing the sample in the center of a chassis of an impact device, placing an impact steel ball in the center of the top surface of the sample, freely falling the impact hammer from a 5000mm rear edge guide pipe, impacting the impact steel ball placed on the top surface of the sample, completing one cycle of impact, carefully observing the condition that cracks appear on the surface (top surface and bottom surface) of the sample during the test, continuing repeatedly performing the impact cycle until the sample reaches a damage state, taking the average value of 6 tests as a final result when the sample has a crack with the width of 5 mm.
The water permeability coefficient test method refers to the water permeability coefficient detection method disclosed in JC/T945-2005, and a water permeability coefficient test device is used for testing and calculating the water permeability coefficient.
The test results are shown in table 1 below:
TABLE 1
As can be seen from the table 1, the pervious concrete block prepared by the invention has good mechanical properties and water permeability, and can meet the general engineering requirements.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The permeable concrete block is characterized by being prepared from the following raw materials in parts by weight:
80-120 parts of cement, 20-30 parts of auxiliary gel material, 40-50 parts of blast furnace granulated slag, 40-50 parts of coarse tailing, 250-280 parts of fine tailing, 2-5 parts of super absorbent resin, 3-6 parts of excitant, 10-20 parts of glass fiber, 0-5 parts of additive and 100-120 parts of water;
the high water-absorbing resin is acrylic acid-hydroxypropyl methacrylate-2-acrylamide-2-methylpropanesulfonic acid polymer/nano cellulose aerogel composite high water-absorbing resin;
the preparation method of the acrylic acid-hydroxypropyl methacrylate-2-acrylamide-2-methylpropanesulfonic acid polymer/nano cellulose aerogel composite super absorbent resin comprises the following steps:
mixing acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid, regulating the neutralization degree by using a NaOH solution, adding hydroxypropyl methacrylate, uniformly mixing to obtain a mixed monomer solution, mixing an initiator, N' -methylenebisacrylamide, nano cellulose aerogel and water, uniformly dispersing by ultrasonic oscillation, adding the mixed monomer solution into the mixed monomer solution, uniformly stirring, performing microwave polymerization for 1-5min, filtering out the obtained product, washing, drying and crushing.
2. The permeable concrete block according to claim 1, wherein the mass ratio of acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and hydroxypropyl methacrylate is 6-10:3-5:1.
3. the permeable concrete block of claim 1, wherein the nanocellulose aerogel is prepared by the following method:
adding nano cellulose into water, dispersing by ultrasonic, dripping into calcium chloride solution, standing for 18-24h after dripping to obtain gel, replacing with alcohol solvent, and vacuum freeze-drying.
4. The permeable concrete block of claim 3, wherein the alcohol solvent is isopropyl alcohol or t-butyl alcohol.
5. The permeable concrete block of claim 1, wherein the auxiliary gel material comprises fly ash, silica fume, and mullite.
6. The permeable concrete block according to claim 5, wherein the mass ratio of fly ash, silica fume and mullite is 3-5:3-5:1.
7. the permeable concrete block of claim 1, wherein the activator comprises a mass ratio of 1:8-10 of sodium hydroxide and sodium silicate.
8. A method for preparing the permeable concrete block according to any one of claims 1 to 7, wherein cement, blast furnace granulated slag, coarse tailings, fine tailings, auxiliary gel materials, an exciting agent and glass fibers are uniformly mixed, super absorbent resin is added into water to be soaked for 3 to 6 minutes in advance, then the super absorbent resin is mixed with a mixture and an additive, the mixture is uniformly mixed, the obtained mortar is poured and molded, and then the mortar is demolded, and is cured to a specified age under standard curing conditions.
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| CN108659171A (en) * | 2017-03-30 | 2018-10-16 | 重庆文理学院 | A kind of preparation method of nano-cellulose super-strong moisture absorbing resin |
| CN110158540A (en) * | 2019-05-14 | 2019-08-23 | 兴源环境科技股份有限公司 | A kind of riverbed in mountains and rivers river and the construction method of shore protection |
| CN110482969A (en) * | 2019-09-30 | 2019-11-22 | 西京学院 | A kind of permeable concrete and preparation method thereof |
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2022
- 2022-12-05 CN CN202211550531.9A patent/CN116041030B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014196789A1 (en) * | 2013-06-05 | 2014-12-11 | Remtech Co., Ltd. | Water-dispersed hydrophobic powder composition and method for preparing pulp paper and glass fiber using the same |
| CN108659171A (en) * | 2017-03-30 | 2018-10-16 | 重庆文理学院 | A kind of preparation method of nano-cellulose super-strong moisture absorbing resin |
| CN107915441A (en) * | 2017-11-21 | 2018-04-17 | 常州达奥新材料科技有限公司 | A kind of preparation method of rapid response type humidity adjusting material |
| CN110158540A (en) * | 2019-05-14 | 2019-08-23 | 兴源环境科技股份有限公司 | A kind of riverbed in mountains and rivers river and the construction method of shore protection |
| CN110482969A (en) * | 2019-09-30 | 2019-11-22 | 西京学院 | A kind of permeable concrete and preparation method thereof |
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