CN112960955B - Self-compacting micro-expansion concrete and preparation method thereof - Google Patents
Self-compacting micro-expansion concrete and preparation method thereof Download PDFInfo
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- CN112960955B CN112960955B CN202110262158.6A CN202110262158A CN112960955B CN 112960955 B CN112960955 B CN 112960955B CN 202110262158 A CN202110262158 A CN 202110262158A CN 112960955 B CN112960955 B CN 112960955B
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- 238000002360 preparation method Methods 0.000 title abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 38
- 239000003822 epoxy resin Substances 0.000 claims abstract description 32
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 32
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims abstract description 25
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229960001124 trientine Drugs 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004575 stone Substances 0.000 claims abstract description 15
- 239000011398 Portland cement Substances 0.000 claims abstract description 14
- 239000010881 fly ash Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000004576 sand Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 9
- 239000011707 mineral Substances 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims abstract description 7
- NSBGJRFJIJFMGW-UHFFFAOYSA-N trisodium;stiborate Chemical compound [Na+].[Na+].[Na+].[O-][Sb]([O-])([O-])=O NSBGJRFJIJFMGW-UHFFFAOYSA-N 0.000 claims description 14
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 12
- 239000000395 magnesium oxide Substances 0.000 claims description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 12
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 12
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 10
- VLCLHFYFMCKBRP-UHFFFAOYSA-N tricalcium;diborate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-] VLCLHFYFMCKBRP-UHFFFAOYSA-N 0.000 claims description 10
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 239000004571 lime Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 9
- 230000002349 favourable effect Effects 0.000 description 7
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 239000011885 synergistic combination Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/16—Acids or salts thereof containing phosphorus in the anion, e.g. phosphates
-
- 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
- C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
- C04B24/121—Amines, polyamines
-
- 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
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/281—Polyepoxides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the field of concrete, and particularly discloses self-compacting micro-expansion concrete and a preparation method thereof. The self-compacting micro-expansion concrete comprises the following components in parts by weight: 220 and 235 parts of Portland cement; 55-65 parts of mineral powder; 170 portions of water and 180 portions of water; 130 portions of fly ash and 135 portions; 830 portions of sand 820-; stone 890-900 portions; 30-35 parts of an expanding agent; 3-6 parts of epoxy resin; 0.2-0.5 part of diethylenetriamine; 0.4-0.7 part of triethylene tetramine; the preparation method comprises the following steps: step 1, mixing portland cement, water, mineral powder and fly ash; step 2, adding sand, stone, an expanding agent, epoxy resin, diethylenetriamine and triethylene tetramine, and uniformly mixing to form concrete slurry; the self-compacting micro-expansion concrete can be used for paving road surfaces and has the advantages of ensuring better compressive strength and elastic modulus; in addition, the preparation method has the advantage of simple preparation.
Description
Technical Field
The application relates to the field of concrete, in particular to self-compacting micro-expansion concrete and a preparation method thereof.
Background
The micro-expansion concrete is prepared by adding a certain amount of expanding agent into common concrete, so that the concrete can expand to a certain extent under the action of the expanding agent during hydration, thereby making up for the shrinkage of the concrete, and achieving the purposes of preventing and treating concrete cracks and improving the performance of the concrete.
The micro-expansive agent is also favorable for better filling the pores in the concrete after expansion, thereby improving the compactness of the micro-expansive concrete, being favorable for better improving the compressive strength of the micro-expansive concrete, but also causing certain influence on the elasticity of the micro-expansive concrete when the compactness of the micro-expansive concrete is improved, so that the micro-expansive concrete is subjected to rolling under higher pressure, the condition of cracking of the micro-expansive concrete due to greater deformation is easy to occur, the micro-expansive concrete is not suitable for pavement paving, and the application range of the micro-expansive concrete is easy to be limited.
In view of the above-mentioned related art, the applicant believes that the micro-expansive concrete has a small elastic modulus and is liable to have a limited range of use, and therefore, there is still room for improvement.
Disclosure of Invention
In order to improve the deformation degree of the self-compacting micro-expansion concrete, the application provides the self-compacting micro-expansion concrete and the preparation method thereof.
In a first aspect, the present application provides a self-compacting micro-expansive concrete, which adopts the following technical scheme:
the self-compacting micro-expansion concrete comprises the following components in parts by weight:
220 and 235 parts of Portland cement;
55-65 parts of mineral powder;
170 portions of water and 180 portions of water;
130 portions of fly ash and 135 portions;
830 portions of sand 820-;
stone 890-900 portions;
30-35 parts of an expanding agent;
3-6 parts of epoxy resin;
0.2-0.5 part of diethylenetriamine;
0.4-0.7 part of triethylene tetramine. .
Preferably, the composition comprises the following components in parts by mass:
225-230 parts of Portland cement;
57-62 parts of mineral powder;
water 175 and 180 portions;
133 portions of fly ash and 135 portions;
822 and 826 parts of sand;
894 portions of stone and 899 portions of stone;
32-34 parts of an expanding agent;
4-5 parts of epoxy resin;
0.4-0.5 part of diethylenetriamine;
0.5-0.6 part of triethylene tetramine.
Through adopting above-mentioned technical scheme, add epoxy, diethylenetriamine and triethylene tetramine in the concrete for the epoxy solidification is favorable to improving the deformability of self-compaction micro-expansion concrete, makes self-compaction micro-expansion concrete receive the great condition that ftractures appear when rolling of pressure more difficult to.
Through the compound epoxy resin that solidifies of diethylenetriamine and triethylene tetramine with specific proportion, be favorable to controlling epoxy resin's the degree of solidification better to make epoxy resin be difficult to appear the solidification not enough and be difficult to promote the elastic modulus's of concrete the condition, simultaneously, also be difficult to appear the epoxy resin solidification excessively and influence the compressive strength's of concrete the condition.
Preferably, the paint also comprises the following components in parts by mass:
0.1-0.2 part of phenol.
By adopting the technical scheme, the curing of the epoxy resin by the diethylenetriamine and the triethylene tetramine is favorably promoted by adding the phenol, so that the curing effect of the epoxy resin is better, the elastic modulus of the concrete is favorably improved, and the application range of the concrete is wider.
Preferably, the feed also comprises the following components in parts by mass:
1-2 parts of sodium antimonate;
0.3-0.5 part of disodium hydrogen phosphate.
Through adopting above-mentioned technical scheme, add sodium antimonate and disodium hydrogen phosphate and cooperate mutually in the concrete, be favorable to improving the compressive strength of concrete to be favorable to remedying the solidification of epoxy to the compressive strength's of concrete influence, be favorable to the concrete to keep the elastic modulus and the compressive strength performance of preferred simultaneously better.
Preferably, the paint also comprises the following components in parts by mass:
0.1 to 0.2 portion of calcium borate.
By adopting the technical scheme, the calcium borate is added into the concrete, so that the reinforcing effect of the sodium antimonate and the disodium hydrogen phosphate on the concrete can be better promoted, and the concrete can better keep better compressive strength performance and elastic modulus.
Preferably, the swelling agent comprises at least a magnesium oxide swelling agent.
By adopting the technical scheme, the expanding agent at least comprises the magnesium oxide expanding agent, so that the expanding agent can better play a role, and the compression strength of the concrete can be improved to a certain extent.
Preferably, the expanding agent is formed by mixing a magnesium oxide expanding agent and a lime expanding agent according to the mass ratio of 1: (2-4) are mixed according to the proportion.
By adopting the technical scheme, the magnesium oxide expanding agent and the lime expanding agent in a specific proportion are cooperatively compounded to form the expanding agent, so that the concrete can be better reinforced by the expanding agent, and the prepared concrete has higher compressive strength.
In a second aspect, the present application provides a method for preparing self-compacting micro-expansive concrete, which adopts the following technical scheme:
a preparation method of self-compacting micro-expansion concrete comprises the following steps:
step 1, mixing portland cement, water, mineral powder and fly ash to form a premix;
step 2, adding sand, stone, an expanding agent, epoxy resin, diethylenetriamine and triethylene tetramine into the premix, and uniformly mixing to form concrete slurry;
and 3, curing and molding the concrete slurry at normal temperature to obtain the self-compacting micro-expansive concrete.
Preferably, phenol, sodium antimonate, disodium hydrogen phosphate and calcium borate are also added in the step 2.
By adopting the technical scheme, the components are favorably and mutually cooperated to play a role better by controlling the mixing sequence of the components, so that the compressive strength performance and the deformation degree of the prepared concrete are better.
In summary, the present application has the following beneficial effects:
1. by adopting the synergistic compounding and curing of the epoxy resin by the diethylenetriamine and the triethylene tetramine in a specific ratio, the curing degree of the epoxy resin can be better controlled, so that the concrete can better keep better compressive strength performance and elastic modulus at the same time.
2. By adding the sodium antimonate and the dipotassium hydrogen phosphate for compounding, the influence of the epoxy resin on the compressive strength of the concrete is favorably compensated, and the concrete can better keep better compressive strength performance and elastic modulus.
3. By controlling the adding sequence of the components, the components are favorably and uniformly mixed and are better compounded in a synergistic manner, so that the concrete better keeps better compressive strength performance and elastic modulus at the same time.
Detailed Description
The present application will be described in further detail with reference to examples.
The source of the raw materials for the following examples and comparative examples are shown in table 1.
TABLE 1
Example 1
The embodiment discloses a self-compacting micro-expansion concrete, which comprises the following components in mass:
220kg of Portland cement; 65kg of mineral powder; 170kg of water; 135kg of fly ash; 820kg of sand; 900kg of stones; 35kg of magnesium oxide expanding agent; 6kg of epoxy resin; 0.5kg of diethylenetriamine; 0.4kg of triethylene tetramine.
The embodiment also discloses a preparation method of the self-compacting micro-expansion concrete, which comprises the following steps:
step 1, adding portland cement, water, mineral powder and fly ash into a stirrer, stirring at a rotating speed of 240r/min, and uniformly stirring to form a premix;
step 2, adding sand, stone, a magnesium oxide expanding agent, epoxy resin, diethylenetriamine and triethylene tetramine into the premix while stirring, and uniformly stirring to form concrete slurry;
and 3, maintaining the concrete slurry at normal temperature for curing and forming to obtain the self-compacting micro-expansive concrete.
Example 2
The difference from example 1 is that:
the self-compacting micro-expansion concrete comprises the following components in parts by weight:
235kg of Portland cement; 55kg of mineral powder; 180kg of water; 130kg of fly ash; 830kg of sand; 890kg of stones; 30kg of magnesium oxide expanding agent; 3kg of epoxy resin; 0.2kg of diethylenetriamine; 0.7kg of triethylene tetramine.
Example 3
The difference from example 1 is that:
the self-compacting micro-expansion concrete comprises the following components in parts by weight:
225kg of Portland cement; 57kg of mineral powder; 175kg of water; 133kg of fly ash; 822kg of sand; 894kg of stones; 32kg of magnesium oxide expanding agent; 4kg of epoxy resin; 0.4kg of diethylenetriamine; 0.5kg of triethylene tetramine.
Example 4
The difference from example 3 is that:
in the preparation process of the self-compacting micro-expansive concrete, 0.1kg of phenol is also added in the step 2.
Example 5
The difference from example 3 is that:
in the preparation process of the self-compacting micro-expansive concrete, 0.2kg of phenol is also added in the step 2.
Example 6
The difference from example 3 is that:
in the preparation process of the self-compacting micro-expansion concrete, 1.5kg of sodium antimonate is also added in the step 2.
Example 7
The difference from example 3 is that:
in the preparation process of the self-compacting micro-expansion concrete, 1.5kg of disodium hydrogen phosphate is also added in the step 2.
Example 8
The difference from example 3 is that:
in the preparation process of the self-compacting micro-expansion concrete, 1kg of sodium antimonate and 0.5kg of dipotassium hydrogen phosphate are also added in the step 2.
Example 9
The difference from example 3 is that:
in the preparation process of the self-compacting micro-expansive concrete, 0.1kg of calcium borate is also added in the step 2.
Example 10
The difference from example 3 is that:
in the preparation process of the self-compacting micro-expansive concrete, 1kg of sodium antimonate, 0.5kg of disodium hydrogen phosphate and 0.1kg of calcium borate are also added in the step 2.
Example 11
The difference from example 3 is that: the expanding agent is prepared by mixing a magnesium oxide expanding agent and a lime expanding agent in a ratio of 1: 2, and the components are uniformly mixed according to the mass ratio.
Example 12
The difference from example 3 is that: the expanding agent is prepared by mixing a magnesium oxide expanding agent and a lime expanding agent in a ratio of 1: 4, and the components are uniformly mixed according to the mass ratio.
Example 13
The difference from example 3 is that:
the self-compacting micro-expansion concrete comprises the following components:
230kg of Portland cement; 62kg of mineral powder; 180kg of water; 135kg of fly ash; 826kg of sand; 899kg of stones; 34kg of magnesium oxide expanding agent; 5kg of epoxy resin; 0.5kg of diethylenetriamine; 0.6kg of triethylene tetramine; 0.2kg of phenol; 2kg of sodium antimonate; 0.5kg of disodium hydrogen phosphate; 0.2kg of calcium borate.
Comparative example 1
The difference from example 3 is that: the same amount of portland cement is used to replace epoxy resin, diethylenetriamine and triethylenetetramine.
Comparative example 2
The difference from example 3 is that: equal amounts of hexamethylenediamine were used instead of diethylenetriamine.
Comparative example 3
The difference from example 3 is that: equal amount of hexamethylenediamine is used instead of triethylenetetramine.
Comparative example 4
The difference from example 3 is that:
the amounts of epoxy resin, diethylenetriamine and triethylenetetramine were as follows:
2kg of epoxy resin; 0.1kg of diethylenetriamine; 0.4kg of triethylene tetramine.
Comparative example 5
The difference from example 3 is that:
the amounts of epoxy resin, diethylenetriamine and triethylenetetramine were as follows:
7kg of epoxy resin; 0.6kg of diethylenetriamine; 0.7kg of triethylene tetramine.
Experiment 1
The static compression elastic modulus (MPa) of the concrete prepared in the above examples and comparative examples is detected according to the static compression elastic modulus test in GB/T50081-2002 Standard of mechanical Properties test methods of ordinary concrete.
Experiment 2
The 28d compressive strength (MPa) of the concrete prepared in the above examples and comparative examples is detected according to the compressive strength test in GB/T50081-2002 Standard test methods for mechanical Properties of common concrete.
The data from the above experiments are shown in Table 2.
TABLE 2
According to the comparison of the data of the example 3 and the comparative examples 1 to 5 in the table 2, the epoxy resin can be better cured only by adopting the synergistic combination of the diethylenetriamine and the triethylenetetramine in a specific proportion, so that the elastic modulus of the concrete can be better improved, and the compressive strength of the concrete can be better improved.
According to the comparison of the data of examples 1-3 in table 2, the control of the amount of each component in the concrete is beneficial to improve the elastic modulus of the concrete to a certain extent.
According to the comparison of the data of the examples 3-5 in the table 2, the addition of phenol is beneficial to better promote the curing effect of diethylenetriamine and triethylene tetramine on epoxy resin and better improve the elastic modulus of concrete.
According to the comparison of the data of the example 3 and the examples 6 to 8 in the table 2, the concrete can be better reinforced only by adopting the synergistic combination of the sodium antimonate and the disodium hydrogen phosphate in a specific ratio, so that the compression strength of the concrete is less susceptible to the influence of the epoxy resin.
According to comparison of data of example 3 and examples 9-10 in table 2, the calcium borate is added to promote the synergistic compounding effect of sodium antimonate and disodium hydrogen phosphate, so that the compressive strength of the concrete is less affected by the epoxy resin, and the concrete can maintain better compressive strength performance and elastic modulus.
According to the comparison between the data of the example 3 and the data of the examples 11 to 12 in the table 2, the specific expanding agents in specific proportions are adopted to cooperate with each other, so that the compressive strength of the concrete is favorably improved, and the compressive strength of the concrete is less affected by the epoxy resin.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (3)
1. A self-compacting micro-expansion concrete is characterized in that: the composition comprises the following components in parts by mass:
220 and 235 parts of Portland cement;
55-65 parts of mineral powder;
170 portions of water and 180 portions of water;
130 portions of fly ash and 135 portions of fly ash;
820-830 parts of sand;
stone 890-900 portions;
30-35 parts of an expanding agent;
3-6 parts of epoxy resin;
0.2-0.5 part of diethylenetriamine;
0.4-0.7 part of triethylene tetramine;
0.1-0.2 part of phenol;
1-2 parts of sodium antimonate;
0.3-0.5 part of disodium hydrogen phosphate;
0.1-0.2 part of calcium borate;
the expanding agent is prepared from a magnesium oxide expanding agent and a lime expanding agent in a mass ratio of 1: (2-4) are mixed according to the proportion.
2. The self-compacting micro-expansive concrete according to claim 1, wherein: the composition comprises the following components in parts by mass:
225-230 parts of Portland cement;
57-62 parts of mineral powder;
water 175 and 180 portions;
133 portions of fly ash and 135 portions;
822 and 826 parts of sand;
894 portions of stone and 899 portions of stone;
32-34 parts of an expanding agent;
4-5 parts of epoxy resin;
0.4-0.5 part of diethylenetriamine;
0.5-0.6 part of triethylene tetramine;
0.1-0.2 part of phenol;
1-2 parts of sodium antimonate;
0.3-0.5 part of disodium hydrogen phosphate;
0.1 to 0.2 portion of calcium borate.
3. A method for preparing the self-compacting micro-expansive concrete as set forth in any one of claims 1-2, wherein: the method comprises the following steps:
step 1, mixing portland cement, water, mineral powder and fly ash to form a premix;
step 2, adding sand, stone, an expanding agent, epoxy resin, diethylenetriamine, triethylene tetramine, phenol, sodium antimonate, disodium hydrogen phosphate and calcium borate into the premix, and uniformly mixing to form concrete slurry;
and 3, curing and molding the concrete slurry at normal temperature to obtain the self-compacting micro-expansive concrete.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110262158.6A CN112960955B (en) | 2021-03-10 | 2021-03-10 | Self-compacting micro-expansion concrete and preparation method thereof |
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| CN202110262158.6A CN112960955B (en) | 2021-03-10 | 2021-03-10 | Self-compacting micro-expansion concrete and preparation method thereof |
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| CN112960955B true CN112960955B (en) | 2022-09-02 |
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| CN113929393B (en) * | 2021-10-27 | 2022-10-14 | 广东信强混凝土有限公司 | Self-compacting C70 concrete and preparation method thereof |
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| CN108059407A (en) * | 2017-12-22 | 2018-05-22 | 久筑节能科技（天津）有限公司 | A kind of high-strength epoxy gap filler |
| CN110467410A (en) * | 2019-09-27 | 2019-11-19 | 安徽虹达道路桥梁工程有限公司 | A kind of Concrete crack repair material and preparation method thereof |
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| CN107572957A (en) * | 2017-09-15 | 2018-01-12 | 广西路桥工程集团有限公司 | A kind of self-compaction non-shrinking steel pipe concrete |
| CN110606709A (en) * | 2019-04-12 | 2019-12-24 | 重庆建工建材物流有限公司 | Ultrahigh-strength self-compacting concrete for giant special-shaped steel pipe column and preparation method thereof |
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| CN108059407A (en) * | 2017-12-22 | 2018-05-22 | 久筑节能科技（天津）有限公司 | A kind of high-strength epoxy gap filler |
| CN110467410A (en) * | 2019-09-27 | 2019-11-19 | 安徽虹达道路桥梁工程有限公司 | A kind of Concrete crack repair material and preparation method thereof |
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