CN115321920B - Concrete mortar, preparation method and application thereof in aspect of improving crack resistance of concrete - Google Patents
Concrete mortar, preparation method and application thereof in aspect of improving crack resistance of concrete Download PDFInfo
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- CN115321920B CN115321920B CN202211078300.2A CN202211078300A CN115321920B CN 115321920 B CN115321920 B CN 115321920B CN 202211078300 A CN202211078300 A CN 202211078300A CN 115321920 B CN115321920 B CN 115321920B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses concrete mortar, a preparation method and application thereof in improving the cracking resistance of concrete, and relates to the technical field of concrete. The raw materials of the concrete mortar comprise the following components in parts by mass: 60-70 parts of ordinary Portland cement, 20-25 parts of fly ash, 40-45 parts of machine-made sand, 1-2 parts of tri (2-ethylhexyl) amine, 2-3 parts of polymer emulsion, 0.2-0.4 part of carbon nano tube, 0.1-0.2 part of beta-terpene resin, 0.5-0.8 part of water reducer and 10-13 parts of water. The concrete mortar has excellent crack resistance, simple preparation process, and improved long-term service performance of concrete members, and promotes the health and long-term development of the construction engineering industry.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to concrete mortar, a preparation method and application thereof in improving the crack resistance of concrete.
Background
The concrete is a building material widely used in the field of building engineering, and has the remarkable characteristics of high strength, high rigidity, long service life and the like. With the improvement of engineering construction level, higher requirements are also put on the performance of concrete.
Although concrete has many excellent properties, cracks are easily generated on the surface of the concrete, which is one of quality problems for restricting the development of concrete engineering. Concrete cracks not only affect the appearance of the building element, but also lead to more serious quality problems after long-term development, thereby affecting the service performance of the concrete. If the concrete is not treated, the concrete can have extremely different properties from the original concrete after cracking, and meanwhile, the permeation of the concrete can accelerate and promote the further deterioration of the concrete, thereby seriously affecting the long-term safety and durability of the component.
Therefore, improving the cracking resistance of concrete is an urgent technical problem to be solved in the field of building engineering.
Disclosure of Invention
The invention aims to provide concrete mortar, a preparation method and application thereof in improving the cracking resistance of concrete, so as to solve the technical problems of poor cracking resistance and easiness in cracking of the concrete.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides concrete mortar, which comprises the following raw materials in parts by mass:
60-70 parts of ordinary Portland cement, 20-25 parts of fly ash, 40-45 parts of machine-made sand, 1-2 parts of tri (2-ethylhexyl) amine, 2-3 parts of polymer emulsion, 0.2-0.4 part of carbon nano tube, 0.1-0.2 part of beta-terpene resin, 0.5-0.8 part of water reducer and 10-13 parts of water.
As a further preferred aspect of the present invention, the polymer emulsion is composed of styrene-acrylic emulsion and styrene-butadiene latex.
As a further preferred aspect of the present invention, the mass ratio of the styrene-acrylic emulsion to the styrene-butadiene latex is 0.2-0.4:1.1-1.3.
As a further preferable aspect of the invention, the specific surface area of the fly ash is 330-450m 2 Per kg, density of 2.0-2.8g/cm 3 。
As a further preferred aspect of the present invention, the water reducing agent is a polycarboxylate water reducing agent.
The invention also provides a preparation method of the concrete mortar, which comprises the following steps:
(1) Modifying the carbon nanotubes by using sodium hydroxide solution and sodium persulfate solution in sequence to obtain pretreated carbon nanotubes;
(2) Mixing the ordinary Portland cement, the fly ash, the tri (2-ethylhexyl) amine and the pretreated carbon nano tube;
(3) Adding the polymer emulsion and the beta-terpene resin into the mixture obtained in the step (2), and uniformly stirring;
(4) And (3) mixing the mixture obtained in the step (3) with water, a water reducing agent and machine-made sand to obtain the concrete mortar.
Further preferable as the invention, the concentration of the sodium hydroxide solution is 6-7mol/L, the temperature is 30-37 ℃, and the modification time is 10-20min; the concentration of the sodium persulfate solution is 2-3mol/L, the temperature is room temperature (25 ℃), and the modification time is 5-8min.
The invention further provides application of the concrete mortar in improving the cracking resistance of concrete.
As a further preferred aspect of the present invention, the concrete mortar is applied as a finishing mortar to a concrete surface.
According to the invention, the carbon nano tube is modified firstly, so that a plurality of active groups are generated on the surface of the carbon nano tube, the treated carbon nano tube can generate interaction among components when being blended with cement, fly ash and tri (2-ethylhexyl) amine, and the cracking resistance of the final concrete mortar is obviously improved, which is possibly related to the reaction of the active carbon nano tube and the tri (2-ethylhexyl) amine and the reaction of the active substances of the cement and the fly ash.
The invention blends the reaction system of the modified carbon nano tube, cement, fly ash and tri (2-ethylhexyl) amine with the polymer emulsion, and adds a very small amount of beta-terpene resin into the system, and as a result, the invention discovers that the very small amount of beta-terpene resin can obviously enhance the cracking resistance of the concrete mortar, and the invention plays a role in component synergy based on the addition of the specific polymer emulsion.
The invention discloses the following technical effects:
the concrete mortar has simple preparation process and excellent effect of preventing concrete from cracking, improves the long-term service performance of concrete members, and further promotes the health and long-term development of the construction engineering industry.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail, which should not be considered as limiting the invention, but rather as more detailed descriptions of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples of the present invention are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
The "parts" in the present invention are all parts by mass unless otherwise specified.
Example 1
The concrete mortar comprises the following raw materials in parts by mass:
60 parts of ordinary Portland cement, 25 parts of fly ash, 43 parts of machine-made sand, 1 part of tri (2-ethylhexyl) amine, 3 parts of polymer emulsion, 0.2 part of carbon nano tube, 0.1 part of beta-terpene resin, 0.6 part of polycarboxylate water reducer and 10 parts of water.
The specific surface area of the fly ash is 350m 2 Per kg, density of 2.0g/cm 3 . The polymer emulsion comprises styrene-acrylic emulsion and styrene-butadiene latex, and the mass ratio of the styrene-acrylic emulsion to the styrene-butadiene latex is 0.2:1.1.
The concrete mortar is prepared by the following steps:
(1) Adding the carbon nano tube into a sodium hydroxide solution with the temperature of 35 ℃ and the concentration of 6mol/L, performing ultrasonic dispersion for 10min, cooling to room temperature, soaking in a sodium persulfate solution with the concentration of 2mol/L for 8min, and filtering to obtain a pretreated carbon nano tube;
(2) Mixing ordinary Portland cement and fly ash, stirring at 500r/min for 6min to uniformly mix, adding tri (2-ethylhexyl) amine and pretreated carbon nanotubes, and continuing stirring for 22min;
(3) Adding styrene-acrylic emulsion, styrene-butadiene latex and beta-terpene resin into the mixture obtained in the step (2), and stirring for 10min at a rotation speed of 550 r/min;
(4) And (3) uniformly mixing water, the polycarboxylate water reducer, machine-made sand and the mixture obtained in the step (3) at a constant rotating speed to obtain the concrete mortar.
Example 2
The concrete mortar comprises the following raw materials in parts by mass:
70 parts of ordinary Portland cement, 23 parts of fly ash, 45 parts of machine-made sand, 1.5 parts of tri (2-ethylhexyl) amine, 2 parts of polymer emulsion, 0.4 part of carbon nano tube, 0.15 part of beta-terpene resin, 0.7 part of polycarboxylate water reducer and 12 parts of water.
The specific surface area of the fly ash is 450m 2 Per kg, density of 2.8g/cm 3 . The polymer emulsion comprises styrene-acrylic emulsion and styrene-butadiene latex, and the mass ratio of the styrene-acrylic emulsion to the styrene-butadiene latex is 0.4:1.3.
The concrete mortar is prepared by the following steps:
(1) Adding the carbon nano tube into a sodium hydroxide solution with the temperature of 30 ℃ and the concentration of 6mol/L, performing ultrasonic dispersion for 20min, cooling to room temperature, soaking in a sodium persulfate solution with the concentration of 2mol/L for 5min, and filtering to obtain a pretreated carbon nano tube;
(2) Mixing ordinary Portland cement and fly ash, stirring at 400r/min for 5min to uniformly mix, adding tri (2-ethylhexyl) amine and pretreated carbon nanotubes, and continuing stirring for 20min;
(3) Adding styrene-acrylic emulsion, styrene-butadiene latex and beta-terpene resin into the mixture obtained in the step (2), and stirring for 6min at a rotation speed of 400 r/min;
(4) And (3) uniformly mixing water, the polycarboxylate water reducer, machine-made sand and the mixture obtained in the step (3) at a constant rotating speed to obtain the concrete mortar.
Example 3
The concrete mortar comprises the following raw materials in parts by mass:
68 parts of ordinary Portland cement, 23 parts of fly ash, 43 parts of machine-made sand, 1.6 parts of tri (2-ethylhexyl) amine, 2.5 parts of polymer emulsion, 0.25 part of carbon nano tube, 0.15 part of beta-terpene resin, 0.6 part of polycarboxylate water reducer and 12 parts of water.
The specific surface area of the fly ash is 380m 2 Per kg, density of 2.2g/cm 3 . The polymer emulsion comprises styrene-acrylic emulsion and styrene-butadiene latex, and the mass ratio of the styrene-acrylic emulsion to the styrene-butadiene latex is 0.3:1.2.
The concrete mortar is prepared by the following steps:
(1) Adding the carbon nano tube into a sodium hydroxide solution with the temperature of 33 ℃ and the concentration of 6.5mol/L, performing ultrasonic dispersion for 18min, cooling to room temperature, soaking in a sodium persulfate solution with the concentration of 2.5mol/L for 6min, and filtering to obtain a pretreated carbon nano tube;
(2) Mixing ordinary Portland cement and fly ash, stirring at 550r/min for 6min to uniformly mix, adding tri (2-ethylhexyl) amine and pretreated carbon nanotubes, and continuing stirring for 23min;
(3) Adding styrene-acrylic emulsion, styrene-butadiene latex and beta-terpene resin into the mixture obtained in the step (2), and stirring for 8min at a rotating speed of 300 r/min;
(4) And (3) uniformly mixing water, the polycarboxylate water reducer, machine-made sand and the mixture obtained in the step (3) at a constant rotating speed to obtain the concrete mortar.
Example 4
The concrete mortar comprises the following raw materials in parts by mass:
65 parts of ordinary Portland cement, 23 parts of fly ash, 40 parts of machine-made sand, 2 parts of tri (2-ethylhexyl) amine, 2.5 parts of polymer emulsion, 0.2 part of carbon nano tube, 0.1 part of beta-terpene resin, 0.6 part of polycarboxylate water reducer and 13 parts of water.
The specific surface area of the fly ash is 450m 2 Per kg, density of 2.0g/cm 3 . The polymer emulsion comprises styrene-acrylic emulsion and styrene-butadiene latex, and the mass ratio of the styrene-acrylic emulsion to the styrene-butadiene latex is 0.2:1.3.
The concrete mortar is prepared by the following steps:
(1) Adding the carbon nano tube into a sodium hydroxide solution with the temperature of 30 ℃ and the concentration of 6.7mol/L, performing ultrasonic dispersion for 10min, cooling to room temperature, soaking in a sodium persulfate solution with the concentration of 2.5mol/L for 6min, and filtering to obtain a pretreated carbon nano tube;
(2) Mixing ordinary Portland cement and fly ash, stirring at 600r/min for 8min to uniformly mix, adding tri (2-ethylhexyl) amine and pretreated carbon nanotubes, and continuously stirring for 20min;
(3) Adding styrene-acrylic emulsion, styrene-butadiene latex and beta-terpene resin into the mixture obtained in the step (2), and stirring for 5min at the rotating speed of 300 r/min;
(4) And (3) uniformly mixing water, the polycarboxylate water reducer, machine-made sand and the mixture obtained in the step (3) at a constant rotating speed to obtain the concrete mortar.
Example 5
The concrete mortar comprises the following raw materials in parts by mass:
70 parts of ordinary Portland cement, 20 parts of fly ash, 45 parts of machine-made sand, 1 part of tri (2-ethylhexyl) amine, 3 parts of polymer emulsion, 0.4 part of carbon nano tube, 0.1 part of beta-terpene resin, 0.8 part of polycarboxylate water reducer and 10 parts of water.
The specific surface area of the fly ash is 350m 2 Per kg, density of 2.0g/cm 3 . The polymer emulsion comprises styrene-acrylic emulsion and styrene-butadiene latex, and the mass ratio of the styrene-acrylic emulsion to the styrene-butadiene latex is 0.3:1.1.
The concrete mortar is prepared by the following steps:
(1) Adding the carbon nano tube into a sodium hydroxide solution with the temperature of 32 ℃ and the concentration of 6mol/L, performing ultrasonic dispersion for 15min, cooling to room temperature, soaking in a sodium persulfate solution with the concentration of 3mol/L for 5min, and filtering to obtain a pretreated carbon nano tube;
(2) Mixing ordinary Portland cement and fly ash, stirring at 600r/min for 8min to uniformly mix, adding tri (2-ethylhexyl) amine and pretreated carbon nanotubes, and continuing stirring for 25min;
(3) Adding styrene-acrylic emulsion, styrene-butadiene latex and beta-terpene resin into the mixture obtained in the step (2), and stirring for 10min at a rotating speed of 300 r/min;
(4) And (3) uniformly mixing water, the polycarboxylate water reducer, machine-made sand and the mixture obtained in the step (3) at a constant rotating speed to obtain the concrete mortar.
Comparative example 1
The only difference from example 1 is that the carbon nanotubes are not modified.
Comparative example 2
The only difference from example 1 is that no tris (2-ethylhexyl) amine was added.
Comparative example 3
The only difference from example 1 is that a single styrene-acrylic emulsion was used for the polymer emulsion, and the total mass of the polymer emulsion was unchanged.
Effect verification example 1
And (3) carrying out crack resistance test on the prepared concrete mortar:
uniformly coating the concrete mortars prepared in the examples 1-5 and the comparative examples 1-3 on concrete base materials with the same specification respectively, ensuring that the coating thickness of the concrete mortars is 100mm, naturally drying, taking the concrete coated with the commercial concrete mortars as a standard concrete sample, performing the same treatment to obtain 9 groups of test pieces, and sequentially performing crack resistance test on the 9 groups of test pieces after 28 d;
the testing method adopts an early crack resistance testing method in GB/T50082-2009 Standard for test methods for the long-term performance and durability of common concrete, adopts a plane sheet die, contains a crack inducer, and simultaneously keeps the wind speed at the center of the surface of a test piece to be not less than 5m/s.
After the completion of the test, the width and length of the crack were recorded, the crack reduction coefficient η was calculated with reference to CECS 38-2004 technical procedure for fiber concrete construction, and the crack resistance was evaluated, with the evaluation criteria being shown in table 1.
The calculation formula of the crack reduction coefficient eta is as follows: η= (a mer -A fer )/A mer Wherein A is mer And A fer The total area of the cracks of the reference concrete sample and the concrete sample of the present invention (concrete samples of the coating examples and comparative examples) were respectively determined.
TABLE 1
| Evaluation criterion | Fracture limiting efficacy rating |
| η≥0.70 | First level |
| 0.55≤η＜0.70 | Second-level |
| 0.40≤η＜0.55 | Three stages |
The crack reduction coefficient η and the corresponding crack limiting performance level for each group are shown in table 2:
TABLE 2
| Crack reduction coefficient eta | Fracture limiting efficacy rating | |
| Example 1 | 0.831 | First level |
| Example 2 | 0.795 | First level |
| Example 3 | 0.824 | First level |
| Example 4 | 0.819 | First level |
| Example 5 | 0.826 | First level |
| Comparative example 1 | 0.566 | Second-level |
| Comparative example 2 | 0.562 | Second-level |
| Comparative example 3 | 0.558 | Second-level |
| Reference concrete sample | / | / |
Effect verification example 2
The concrete mortars prepared in examples 1 to 5 and comparative examples 1 to 3 were uniformly applied to the concrete base materials of the same specifications, the thickness of the applied concrete mortars was ensured to be 100mm, the concrete was naturally dried, and the same treatment was performed using the concrete coated with the commercial concrete mortars as a control concrete sample, to obtain 9 groups of test pieces, and after 28 days, mechanical property test was sequentially performed on the 9 groups of test pieces, and the results are shown in table 3.
The compressive strength of the test piece is tested according to GB/T50081-2019 'test method Standard for physical and mechanical Properties of concrete';
and (3) performing impact resistance test on the test piece according to CECS 13-2009 fiber concrete test method standard.
TABLE 3 Table 3
| Compressive strength (Mpa) | Initial crack impact energy consumption (J) | Destruction impact energy consumption (J) | |
| Example 1 | 29 | 1551.1 | 1674.2 |
| Example 2 | 28 | 1537.9 | 1670.3 |
| Example 3 | 28 | 1544.6 | 1676.8 |
| Example 4 | 27 | 1537.8 | 1668.9 |
| Example 5 | 28 | 1546.2 | 1670.2 |
| Comparative example 1 | 24 | 1033.1 | 1320.5 |
| Comparative example 2 | 22 | 986.3 | 1053.8 |
| Comparative example 3 | 22 | 953.7 | 1029.6 |
| Control group | 20 | 873.6 | 1012.3 |
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (7)
1. The concrete mortar is characterized by comprising the following raw materials in parts by mass:
60-70 parts of ordinary Portland cement, 20-25 parts of fly ash, 40-45 parts of machine-made sand, 1-2 parts of tri (2-ethylhexyl) amine, 2-3 parts of polymer emulsion, 0.2-0.4 part of carbon nano tube, 0.1-0.2 part of beta-terpene resin, 0.5-0.8 part of water reducer and 10-13 parts of water;
the preparation method of the concrete mortar comprises the following steps:
(1) Modifying the carbon nanotubes by sequentially utilizing a sodium hydroxide solution and a sodium persulfate solution to obtain pretreated carbon nanotubes;
(2) Mixing the ordinary Portland cement, the fly ash, the tri (2-ethylhexyl) amine and the pretreated carbon nanotubes;
(3) Adding the polymer emulsion and the beta-terpene resin into the mixture obtained in the step (2), and uniformly stirring;
(4) Mixing the mixture obtained in the step (3) with water, the water reducing agent and machine-made sand to obtain the concrete mortar;
in the modification process, the concentration of the sodium hydroxide solution is 6-7mol/L, the temperature is 30-37 ℃, and the modification time is 10-20min; the concentration of the sodium persulfate solution is 2-3mol/L, the temperature is room temperature, and the modification time is 5-8min.
2. The concrete mortar of claim 1, wherein the polymer emulsion consists of styrene-acrylic emulsion and styrene-butadiene latex.
3. The concrete mortar of claim 2, wherein the mass ratio of the styrene-acrylic emulsion to the styrene-butadiene latex is 0.2-0.4:1.1-1.3.
4. The concrete mortar of claim 1, wherein the specific surface area of the fly ash is 330-450m 2 Per kg, density of 2.0-2.8g/cm 3 。
5. The concrete mortar of claim 1, wherein the water reducer is a polycarboxylate water reducer.
6. Use of a concrete mortar according to any one of claims 1 to 5 for improving crack resistance of concrete.
7. The use according to claim 6, wherein the concrete mortar is applied as a finishing mortar to a concrete surface.
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| JP2013053015A (en) * | 2011-09-01 | 2013-03-21 | Nippon Shokubai Co Ltd | Modifier for concrete |
| CN107312101A (en) * | 2016-12-30 | 2017-11-03 | 江苏苏博特新材料股份有限公司 | A kind of cracking resistance resistance rust additive |
| CN112521090A (en) * | 2020-12-07 | 2021-03-19 | 桂林理工大学 | Modified multi-walled carbon nanotube modified cement-based composite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013053015A (en) * | 2011-09-01 | 2013-03-21 | Nippon Shokubai Co Ltd | Modifier for concrete |
| CN107312101A (en) * | 2016-12-30 | 2017-11-03 | 江苏苏博特新材料股份有限公司 | A kind of cracking resistance resistance rust additive |
| CN112521090A (en) * | 2020-12-07 | 2021-03-19 | 桂林理工大学 | Modified multi-walled carbon nanotube modified cement-based composite material and preparation method thereof |
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