CN112142494B - Light high-strength concrete and preparation method thereof - Google Patents
Light high-strength concrete and preparation method thereof Download PDFInfo
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- CN112142494B CN112142494B CN202010988697.3A CN202010988697A CN112142494B CN 112142494 B CN112142494 B CN 112142494B CN 202010988697 A CN202010988697 A CN 202010988697A CN 112142494 B CN112142494 B CN 112142494B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—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
- 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
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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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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of building materials, and particularly relates to light high-strength concrete and a preparation method thereof. The product developed by the invention comprises a sheet silicate filler; the surface of the monolithic layer structure of the sheet silicate filler is grafted with dimethylaminoethyl methacrylate; gelatin with isoelectric point lower than 7.0 is filled between the monolithic layer structures. Wherein the metal ions in the sheet silicate framework are at least partially replaced by hydrogen ions. In addition, the gelatin is also dispersed with elastomer emulsion; the elastomer emulsion is room temperature vulcanized silicone rubber emulsion. The product obtained by the invention can enable the sheet-shaped structures of the sheet-shaped silicate filler to be propped open and fixed in the cement hydration process, so that a channel for water diffusion is formed inside the sheet-shaped silicate filler, and after the cement hydration is finished, the sheet-shaped silicate filler can expand in volume to a certain degree in the water permeable process, so that relative negative pressure is formed inside the water permeable concrete, and the rapid downward permeation and diffusion of water are facilitated.
Description
Technical Field
The invention belongs to the technical field of building materials. And more particularly, to a lightweight high-strength concrete and a method for preparing the same.
Background
Along with economic development, city spongization process is faster and faster, and road planning plays very important effect in urban construction, and traditional road surface is mostly impervious road surface, and easy ponding reduces the travelling comfort, not only can cause the interference to performance such as road surface self intensity, also can influence people's trip because road surface and water simultaneously, and the trip of giving people brings very big inconvenience, also brings negative effects for ecological environment.
Compared with a water-impermeable road surface, the water-permeable concrete road surface has the advantages of effectively adjusting the temperature and the humidity of the ground, lightening the burden of a road drainage system in a rainfall season, absorbing noise generated when vehicles run and the like. However, most pervious concrete products in the market at present have the following disadvantages: low strength, easy collapse, poor water permeability, large apparent density and difficult construction. At present, GB/T25993-.
The reason is that in order to improve the water permeability of the permeable pavement and guarantee the strength performance of the concrete pavement, the internal porosity is balanced as much as possible, the porosity is too large, and although the water permeability can be guaranteed, the strength is inevitably reduced; therefore, the research on the composition of the cementing material, a proper reinforcing agent, lightweight aggregate and other technologies is carried out at the same time, and how to fundamentally solve the contradiction between the porosity and the strength becomes one of the bottlenecks which restrict the performance of the pervious concrete pavement.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defect and the defect that the porosity and the strength of the existing pervious concrete cannot be coordinated and unified, and provides light high-strength concrete and a preparation method thereof.
The invention aims to provide light high-strength concrete.
The invention also aims to provide a preparation method of the light high-strength concrete.
The above purpose of the invention is realized by the following technical scheme:
a light high-strength concrete comprises sheet silicate filler accounting for 5-15% of the mass of cement;
the surface of the monolithic layer structure of the sheet silicate filler is grafted with dimethylaminoethyl methacrylate;
gelatin with isoelectric point of 7.0 is filled between the monolithic layer structures.
According to the technical scheme, the sheet silicate filler is added into a concrete system, the sheet silicate is composed of a plurality of monolithic layer structures, grafting modification is carried out on each monolithic layer structure, the surface of each monolithic layer is introduced with the dimethylamino ethyl polymethacrylate, and gelatin with the isoelectric point of 7.0 is filled between the monolithic layer structures; in the practical use process, because the cement system is an alkaline system, hydroxide ions in the system react with carboxyl in a gelatin molecular structure at the moment, so that the carboxyl is negatively charged after ionization, gelatin molecules stretch due to mutual repulsion of the same charges, so that the gelatin expands, and layered silicate is propped open in the expansion process, so that a diffusion channel of water is formed inside the gelatin, and in addition, due to grafting on the surface of a monolithic layer structure, a grafted polymer molecular chain can be mutually restricted and tangled with a gel network structure generated by hydration of the cement, so that the channel formed by the expansion of the layered silicate is finally solidified;
according to the technical scheme, the gelatin with a specific isoelectric point is selected to control the expansion rate of the gelatin, so that the controllable gap generated by the expansion of each adjacent monolithic layer structure is ensured, only water is allowed to pass through, and components such as cement are not allowed to enter; after the sheet-shaped structure is intertwined and fixed, the sheet-shaped structure can be used as a reinforcing filler, so that the water permeability requirement is met, and the strength is effectively improved.
Preferably, the sheet silicate is any one of montmorillonite, kaolin, hydrotalcite and muscovite.
Preferably, the metal ions in the sheet silicate framework are at least partially replaced by hydrogen ions.
By replacing metal ions in the sheet silicate framework with hydrogen ions, Si-O in the framework structure is converted into active Si-OH, and in the using process, the Si-OH can participate in the hydration reaction of cement, so that the hole wall of a hole generated by expansion is effectively bonded with a cement system, the collapse of the hole is avoided, and the water permeability stability of the product is effectively improved.
Preferably, the gelatin has dispersed therein elastomer emulsion particles.
Preferably, the elastomer emulsion is a room temperature vulcanized silicone rubber emulsion.
According to the technical scheme, the elastomer emulsion is further introduced into the gelatin, and in the actual use process, the viscoelastic property of the gelatin can be effectively improved due to the existence of the elastomer, and the structural stability of the pores is improved; in addition, gelatin is as the body that absorbs water, can absorb moisture fast in the process of permeating water to let the hydrone get into inside the molecular structure, arouse the inflation of elastomer, in the inflation, to a certain extent to gelatin formation pressure, make inside moisture extruded the discharge, form quick respiratory drainage process.
A preparation method of light high-strength concrete comprises the following specific preparation steps:
preparing a sheet silicate filler; the preparation of the sheet silicate filler comprises grafting reaction and gelatin filling;
the grafting reaction is as follows:
mixing sheet silicate and polyvinyl alcohol solution according to the mass ratio of 1: 5-1: 10, mixing, performing ultrasonic dispersion, spray drying, and calcining to obtain a calcined material;
according to the weight portion, 5-10 portions of concentrated hydrochloric acid, 80-100 portions of absolute ethyl alcohol and 10-15 portions of calcined material are taken in sequence, heated and refluxed for 3-5 hours after being mixed, and dried to obtain modified calcined material;
according to the weight portion, 30-40 portions of modified calcined material, 300-400 portions of anhydrous ethanol, 3-5 portions of 3- (methacryloyloxy) propyl trimethoxy silane (MPS), 0.1-0.3 portion of ammonia water and 3-5 portions of dimethylaminoethyl methacrylate (DMAEMA) are taken in sequence; firstly, stirring and reacting the modified calcined material, absolute ethyl alcohol, MPS and ammonia water for 36 hours, and then filtering, washing and drying to obtain a dry filter cake; and then mixing the dried filter cake and the ethanol solution according to the mass ratio of 1: 5-1: 10, mixing and dispersing, then adding ferrous sulfate with the mass of 0.3-0.5% of that of a dry filter cake and DMAEMA, then carrying out irradiation crosslinking reaction under the nitrogen protection state, and then carrying out centrifugal separation and drying to obtain sheet silicate with the surface grafted with the dimethylaminoethyl methacrylate in the monolithic layer structure;
the gelatin filling is as follows:
sheet silicate with the surface of the single-layer structure grafted with the dimethylaminoethyl methacrylate and gelatin solution with the isoelectric point lower than 7.0 are mixed according to the mass ratio of 1: 5-1: 10, mixing and dispersing, adjusting the pH value to the isoelectric point of gelatin, filtering, washing and drying to obtain the sheet silicate filler.
Preferably, the sheet silicate is any one of montmorillonite, kaolin, hydrotalcite and muscovite.
Preferably, the sheet silicate is a pre-treated sheet silicate; the pretreatment process of the sheet silicate comprises the following steps: mixing sheet silicate and hydrochloric acid with the mass fraction of 3-5% according to the mass ratio of 1: 3-1: 5, mixing and dispersing, heating, stirring and reacting, filtering, washing and drying to obtain the pretreated sheet silicate.
Preferably, the gelatin fill further comprises:
sheet silicate with the surface of the single-layer structure grafted with the dimethylaminoethyl methacrylate and gelatin solution with the isoelectric point lower than 7.0 are mixed according to the mass ratio of 1: 5-1: 10, mixing and dispersing, adding elastomer emulsion with the mass of 10-15% of that of the gelatin solution, adjusting the pH value to the isoelectric point of the gelatin, filtering, washing and drying to obtain the sheet silicate filler;
the solid content of the elastomer emulsion is 35-55%.
Preferably, the elastomer emulsion is a room temperature vulcanized silicone rubber emulsion.
The invention has the following beneficial effects:
(1) the product does not contain components such as an air entraining agent or a foaming agent, silicate in a lamellar structure is stripped by utilizing the volume expansion of gelatin in the process of deviating from an isoelectric point, and a water diffusion channel is formed by utilizing the increase of the interval between adjacent lamellar layers of the lamellar structure, so that the effects of light weight and water permeability are achieved while the reinforcement is realized, and the contradiction between light weight and high strength is effectively solved;
(2) the product of the invention has rapid water permeability and stable structure, the water permeable channel is not easy to be blocked, and the channel can generate certain volume change in the water permeable process to strengthen the drainage process.
Detailed Description
The present invention is further illustrated by the following specific examples, which are not intended to limit the invention in any way. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
Unless otherwise indicated, reagents and materials used in the following examples are commercially available.
Example 1
Mixing sheet silicate and hydrochloric acid with the mass fraction of 3% according to the mass ratio of 1: 3, mixing and dispersing, heating, stirring and reacting for 2 hours at the temperature of 85 ℃ and the rotating speed of 400r/min, filtering, washing and drying to obtain pretreated sheet silicate; the sheet silicate is montmorillonite;
pretreating sheet silicate and 1% of polyvinyl alcohol solution according to the mass ratio of 1: 5, mixing, performing ultrasonic dispersion for 1h under the condition of the frequency of 55kHz, performing spray drying, and calcining for 45min at the temperature of 200 ℃ to obtain a calcined material;
according to the weight portion, sequentially taking 5 portions of concentrated hydrochloric acid with the mass fraction of 37%, 80 portions of absolute ethyl alcohol and 10 portions of calcined material, mixing, heating and refluxing for reaction for 3 hours at the temperature of 75 ℃, and drying to obtain a modified calcined material;
according to the weight parts, 30 parts of modified calcined material, 300 parts of absolute ethyl alcohol, 3 parts of 3- (methacryloyloxy) propyl trimethoxy silane (MPS), 0.1 part of ammonia water with the mass fraction of 10% and 3 parts of dimethylaminoethyl methacrylate (DMAEMA) are taken in sequence; firstly, stirring and reacting the modified calcined material, absolute ethyl alcohol, MPS and ammonia water for 36 hours at room temperature, and then filtering, washing and drying to obtain a dry filter cake; and mixing the dried filter cake with 30% ethanol solution according to the mass ratio of 1: 5, mixing and dispersing, then adding ferrous sulfate with the mass of 0.3 percent of that of the dry filter cake and DMAEMA, then carrying out irradiation crosslinking reaction under the nitrogen protection state, and then carrying out centrifugal separation and drying to obtain the sheet silicate with the surface of the monolithic layer structure grafted with the dimethylaminoethyl methacrylate;
sheet silicate with the surface of the single-layer structure grafted with the dimethylaminoethyl methacrylate and gelatin solution with isoelectric point of 7.0 and mass fraction of 3 percent are mixed according to the mass ratio of 1: 5, mixing and dispersing, adding elastomer emulsion with the mass of 10% of that of the gelatin solution, adjusting the pH value to the isoelectric point of the gelatin, filtering, washing and drying to obtain the sheet silicate filler;
the solid content of the elastomer emulsion is 35 percent; the elastomer emulsion is room-temperature vulcanized silicone rubber emulsion;
according to the weight parts, 30 parts of sheet silicate filler, 60 parts of 42.5 ordinary portland cement, 10 parts of medium sand, 10 parts of coarse sand, 1 part of polycarboxylic acid water reducing agent and 8 parts of pebbles with the particle size of 10mm are sequentially taken, stirred and mixed uniformly, and the light high-strength concrete is obtained.
Example 2
Mixing sheet silicate and 4% hydrochloric acid in a mass ratio of 1: 4, mixing and dispersing, heating, stirring and reacting for 3 hours at the temperature of 88 ℃ and the rotating speed of 500r/min, filtering, washing and drying to obtain pretreated sheet silicate; the sheet silicate is kaolin;
pretreating sheet silicate and 3% of polyvinyl alcohol solution according to the mass ratio of 1: 8, mixing, performing ultrasonic dispersion for 1.5h under the condition of the frequency of 65kHz, performing spray drying, and calcining for 50min at the temperature of 205 ℃ to obtain a calcined material;
according to the weight parts, sequentially taking 8 parts of concentrated hydrochloric acid with the mass fraction of 37%, 90 parts of absolute ethyl alcohol and 12 parts of calcined material, mixing, heating and refluxing for 4 hours at the temperature of 78 ℃, and drying to obtain a modified calcined material;
according to the weight parts, 35 parts of modified calcined material, 350 parts of absolute ethyl alcohol, 4 parts of 3- (methacryloyloxy) propyl trimethoxy silane (MPS), 0.2 part of 12% ammonia water by mass fraction and 4 parts of dimethylaminoethyl methacrylate (DMAEMA) are taken in sequence; firstly, stirring and reacting the modified calcined material, absolute ethyl alcohol, MPS and ammonia water for 36 hours at room temperature, and then filtering, washing and drying to obtain a dry filter cake; and mixing the dried filter cake with 50% of ethanol solution according to the mass ratio of 1: 8, mixing and dispersing, then adding ferrous sulfate with the mass of 0.4 percent of that of the dry filter cake and DMAEMA, then carrying out irradiation crosslinking reaction under the nitrogen protection state, and then carrying out centrifugal separation and drying to obtain the sheet silicate with the surface of the monolithic layer structure grafted with the dimethylaminoethyl methacrylate;
sheet silicate with the surface of the single-layer structure grafted with the dimethylaminoethyl methacrylate and gelatin solution with isoelectric point of 7.0 and mass fraction of 5 percent are mixed according to the mass ratio of 1: 8, mixing and dispersing, adding elastomer emulsion with the mass of 12% of that of the gelatin solution, adjusting the pH value to the isoelectric point of the gelatin, filtering, washing and drying to obtain sheet silicate filler;
the solid content of the elastomer emulsion is 45 percent; the elastomer emulsion is room-temperature vulcanized silicone rubber emulsion;
according to the weight parts, 40 parts of sheet silicate filler, 70 parts of 42.5 parts of ordinary portland cement, 15 parts of medium sand, 15 parts of coarse sand, 2 parts of polycarboxylic acid water reducing agent and 9 parts of pebbles with the particle size of 20mm are sequentially taken, stirred and mixed uniformly, and the light high-strength concrete is obtained.
Example 3
Mixing sheet silicate and 5% hydrochloric acid according to the mass ratio of 1: 5, mixing and dispersing, heating, stirring and reacting for 4 hours at the temperature of 90 ℃ and the rotating speed of 600r/min, filtering, washing and drying to obtain pretreated sheet silicate; the sheet silicate is hydrotalcite;
pretreating sheet silicate and 5% of polyvinyl alcohol solution according to the mass ratio of 1: 10, mixing, performing ultrasonic dispersion for 2 hours under the condition of 85kHz frequency, performing spray drying, and calcining for 60 minutes at the temperature of 210 ℃ to obtain a calcined material;
according to the weight portion, 10 portions of concentrated hydrochloric acid with the mass fraction of 37%, 100 portions of absolute ethyl alcohol and 15 portions of calcined material are taken in sequence, mixed, heated and refluxed for 5 hours at the temperature of 80 ℃, and dried to obtain modified calcined material;
according to the weight parts, 40 parts of modified calcined material, 400 parts of absolute ethyl alcohol, 5 parts of 3- (methacryloyloxy) propyl trimethoxy silane (MPS), 0.3 part of ammonia water with the mass fraction of 15% and 5 parts of dimethylaminoethyl methacrylate (DMAEMA) are taken in sequence; firstly, stirring and reacting the modified calcined material, absolute ethyl alcohol, MPS and ammonia water for 36 hours at room temperature, and then filtering, washing and drying to obtain a dry filter cake; and mixing the dried filter cake with an ethanol solution with the mass fraction of 60% according to the mass ratio of 1: 10, mixing and dispersing, then adding ferrous sulfate with the mass of 0.5 percent of that of a dry filter cake and DMAEMA, then carrying out irradiation crosslinking reaction under the protection of nitrogen, and then carrying out centrifugal separation and drying to obtain sheet silicate with the surface of the monolithic layer structure grafted with the dimethylaminoethyl methacrylate;
sheet silicate with the surface of the single-layer structure grafted with the dimethylaminoethyl methacrylate and gelatin solution with isoelectric point of 7.0 and mass fraction of 10 percent are mixed according to the mass ratio of 1: 10, mixing and dispersing, adding an elastomer emulsion with the mass of 15% of that of a gelatin solution, adjusting the pH value to the isoelectric point of gelatin, filtering, washing and drying to obtain a sheet silicate filler;
the solid content of the elastomer emulsion is 55 percent; the elastomer emulsion is room-temperature vulcanized silicone rubber emulsion;
according to the weight parts, 50 parts of sheet silicate filler, 80 parts of 42.5 parts of ordinary portland cement, 20 parts of medium sand, 30 parts of coarse sand, 3 parts of polycarboxylic acid water reducing agent and 10 parts of pebbles with the particle size of 30mm are sequentially taken, stirred and mixed uniformly, and the light high-strength concrete is obtained.
Comparative example 1
This comparative example differs from example 1 in that: the gelatin has isoelectric point of 6.5, and the rest conditions are kept unchanged.
Comparative example 2
This comparative example differs from example 1 in that: the layer silicate is replaced by the gas phase silicon dioxide with equal mass, and the rest conditions are kept unchanged.
Comparative example 3
The concrete of the following formula was selected for this comparative example: according to the weight portion, 60 portions of 42.5 portions of ordinary portland cement, 10 portions of medium sand, 10 portions of coarse sand, 1 portion of polycarboxylic acid water reducing agent, 3 portions of emulsifier OP-10 and 8 portions of pebbles with the particle size of 10mm are taken in sequence, and are stirred and mixed uniformly, so that the light high-strength concrete is obtained.
The products obtained in examples 1 to 3 and comparative examples 1 to 3 were subjected to performance tests, and the specific test methods and test results were as follows:
mixing the products obtained in examples 1-3 and comparative examples 1-3 with water at a water-cement ratio of 0.4, uniformly stirring and mixing, pouring into a mold, performing vibration molding, standing at room temperature for 28 days for curing, and demolding to prepare a cylindrical test block with a diameter of 10cm and a height of 10 cm;
carrying out a compressive strength test according to GB/T50081-2009 standard of test method for mechanical properties of common concrete; measuring the water permeability coefficient according to appendix A of CJJ/T135-2009 technical Specification for permeable cement concrete pavements; the specific test results are shown in table 1:
table 1: product performance test results
| Compressive strength/MPa | Permeability coefficient/mm/s | |
| Example 1 | 48.9 | 4.5 |
| Example 2 | 52.6 | 4.6 |
| Example 3 | 51.8 | 4.8 |
| Comparative example 1 | 42.5 | 3.5 |
| Comparative example 2 | 38.5 | 2.5 |
| Comparative example 3 | 36.6 | 2.3 |
As can be seen from the test results in Table 1, the product obtained by the method has excellent compressive strength and keeps higher water permeability.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (5)
1. The preparation method of the light high-strength concrete is characterized by comprising the following specific preparation steps:
preparing a sheet silicate filler; the preparation of the sheet silicate filler comprises grafting reaction and gelatin filling;
the grafting reaction is as follows:
mixing sheet silicate and polyvinyl alcohol solution according to the mass ratio of 1: 5-1: 10, mixing, performing ultrasonic dispersion, spray drying, and calcining to obtain a calcined material;
according to the weight portion, 5-10 portions of concentrated hydrochloric acid, 80-100 portions of absolute ethyl alcohol and 10-15 portions of calcined material are taken in sequence, heated and refluxed for 3-5 hours after being mixed, and dried to obtain modified calcined material;
according to the parts by weight, 30-40 parts of modified calcined material, 300-400 parts of anhydrous ethanol, 3-5 parts of 3- (methacryloyloxy) propyl trimethoxy silane MPS, 0.1-0.3 part of ammonia water and 3-5 parts of dimethylaminoethyl methacrylate DMAEMA are taken in sequence; firstly, stirring and reacting the modified calcined material, absolute ethyl alcohol, MPS and ammonia water for 36 hours, and then filtering, washing and drying to obtain a dry filter cake; and then mixing the dried filter cake and the ethanol solution according to the mass ratio of 1: 5-1: 10, mixing and dispersing, then adding ferrous sulfate and DMAEMA with the mass of 0.3-0.5% of that of the dry filter cake, then carrying out irradiation crosslinking reaction under the nitrogen protection state, and then carrying out centrifugal separation and drying to obtain the sheet silicate with the surface grafted with the dimethylaminoethyl methacrylate in the monolithic layer structure;
the gelatin filling is as follows:
sheet silicate with the surface of the single-layer structure grafted with the dimethylaminoethyl methacrylate and gelatin solution with the isoelectric point lower than 7.0 are mixed according to the mass ratio of 1: 5-1: 10, mixing and dispersing, adding elastomer emulsion with the mass of 10-15% of that of the gelatin solution, adjusting the pH value to the isoelectric point of the gelatin, filtering, washing and drying to obtain the sheet silicate filler;
the solid content of the elastomer emulsion is 35-55%.
2. The method for preparing lightweight high-strength concrete according to claim 1, wherein the sheet silicate is any one of montmorillonite, kaolin, hydrotalcite and muscovite.
3. A method for producing a lightweight high-strength concrete according to any one of claims 1 or 2, wherein said sheet silicate is a pre-treated sheet silicate; the pretreatment process of the sheet silicate comprises the following steps: mixing sheet silicate and hydrochloric acid with the mass fraction of 3-5% according to the mass ratio of 1: 3-1: 5, mixing and dispersing, heating, stirring and reacting, filtering, washing and drying to obtain the pretreated sheet silicate.
4. The method of claim 1, wherein the elastomer emulsion is room temperature vulcanized silicone rubber emulsion.
5. The lightweight high-strength concrete prepared by the preparation method according to any one of claims 1 to 4.
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3524796A1 (en) * | 1984-07-14 | 1986-01-16 | Okura Kogyo K.K., Marugame, Kagawa | METHOD FOR PRODUCING PLASTIC CONCRETE |
| FR2771406B1 (en) * | 1997-11-27 | 2000-02-11 | Bouygues Sa | METAL FIBER CONCRETE, CEMENT MATRIX AND PREMIXES FOR THE PREPARATION OF THE MATRIX AND CONCRETE |
| JP4030428B2 (en) * | 2000-09-21 | 2008-01-09 | ローム アンド ハース カンパニー | Emulsion polymerization process involving lightly modified clay and composition comprising the same |
| CN107337396A (en) * | 2017-08-28 | 2017-11-10 | 宿松县尚鼎建材有限公司 | A kind of high-intensity anti-cracking concrete and preparation method thereof |
| CN110510913A (en) * | 2019-08-21 | 2019-11-29 | 安徽省高迪环保股份有限公司 | A kind of preparation method of the undisguised agent of prefabricated components concrete surface |
| CN110668841B (en) * | 2019-10-22 | 2020-09-18 | 乐清市川嘉电气科技有限公司 | Durable foam concrete and preparation method thereof |
| CN110904728B (en) * | 2019-11-21 | 2022-03-22 | 陕西科技大学 | Gelatin-based papermaking sizing agent based on hydrogen bond effect and preparation method thereof |
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| CN112142494A (en) | 2020-12-29 |
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Effective date of registration: 20210804 Address after: 543300 plot iva-7-2-1, industrial concentration area, Tengzhou Town, Teng County, Wuzhou City, Guangxi Zhuang Autonomous Region Applicant after: Tengxian Xiangzhao Concrete Co.,Ltd. Address before: 528139 No.15 jiqingli, third lane, front team, dushugang temple, Lubao Town, Sanshui District, Foshan City, Guangdong Province Applicant before: Cai Yanchang |
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