CN111377694A - Graphene oxide modified raw soil-based material and nano-modification method thereof - Google Patents
Graphene oxide modified raw soil-based material and nano-modification method thereof Download PDFInfo
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- CN111377694A CN111377694A CN202010393906.XA CN202010393906A CN111377694A CN 111377694 A CN111377694 A CN 111377694A CN 202010393906 A CN202010393906 A CN 202010393906A CN 111377694 A CN111377694 A CN 111377694A
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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
- 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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Abstract
The invention discloses a graphene oxide modified raw soil-based material and a nano modification method thereof, wherein the method comprises the following steps: taking 0.03-0.12 part of graphene oxide powder or turbid liquid according to the mass ratio; adding 0.1-0.4 part of polycarboxylic acid water reducing agent and 35 parts of water into graphene oxide powder or turbid liquid, stirring, and performing ultrasonic dispersion to obtain graphene oxide mixed liquid; mixing 60-100 parts of raw soil, 5-15 parts of cement, 5-20 parts of fly ash and 5-15 parts of slag in solid raw materials uniformly; and mixing the graphene oxide mixed solution with the solid raw material, and fully and uniformly mixing the graphene oxide mixed solution with the solid raw material to obtain the graphene oxide modified raw soil matrix composite. According to the graphene oxide modified raw soil-based material, the graphene oxide can excite the hydration reaction of cement and mineral admixtures, so that the hydration process can be regulated, the excellent mechanical property and durability of the raw soil-based material are obviously improved, and the shrinkage rate is reduced.
Description
Technical Field
The invention belongs to the field of building materials, and relates to a graphene oxide modified raw soil base material and a modification method thereof.
Background
For thousands of years, raw soil becomes a widely used natural green building material due to the advantages of easily available raw materials, economy, environmental protection, good thermal stability, outstanding reclamation advantages and the like, and a huge number of raw soil buildings still exist in western regions of China today. In recent years, raw soil materials and raw soil constructions have again gained wide attention. However, due to the defects of the traditional raw soil material in the aspects of mechanical property, durability and the like, the traditional raw soil material cannot well meet the requirements of human beings on higher standards in the aspects of building safety, durability and the like. Therefore, by combining the latest scientific and technological achievements at present, how to explore an effective raw soil base material modification way has great significance for improving the safety of raw soil buildings and promoting the popularization of the raw soil buildings.
The graphene oxide serving as a novel nano material has very excellent optical, electrical and mechanical properties, and can effectively improve and enhance the microstructure and macroscopic properties of materials such as ceramics, metals, cement bases and the like. If a small amount (about 0.03 wt%) of graphene oxide is doped into a cement matrix, the mechanical properties such as compression resistance, fracture resistance and the like and the durability of the cement matrix can be remarkably improved. However, at present, modification of the raw soil-based material is mainly focused on cement, mineral admixtures, biological fibers and the like, so that the realization of nano modification of the raw soil-based material by utilizing graphene oxide, cement and the like is a feasible way, and has great scientific significance and use value.
Disclosure of Invention
In order to solve the above defects in the prior art, the present invention aims to provide a method for modifying a raw soil-based material by using graphene oxide. The graphene oxide modified raw soil-based material has excellent mechanical properties and durability, and the flexural strength and the compressive strength of the graphene oxide modified raw soil-based material are superior to those of the existing raw soil-based material.
The invention is realized by the following technical scheme.
The invention provides a graphene oxide modified raw soil-based material which comprises the following raw materials in percentage by mass:
solid raw materials:
60-100 parts of raw soil, 5-15 parts of cement, 5-20 parts of fly ash and 5-15 parts of slag;
0.03-0.1 part of graphene oxide;
0.1-0.4 part of polycarboxylic acid water reducing agent;
35 parts of water.
In the above technical solution, a further preferred solution is:
the raw soil is loess.
The cement is ordinary portland cement.
The graphene oxide is graphene oxide powder or suspension liquid with the purity of more than 99% and the particle thickness of 0.1-1 nm.
The nano modification method of the graphene oxide modified raw soil-based material comprises the following steps:
1) weighing 0.03-0.12 part of graphene oxide powder or turbid liquid according to the mass ratio;
2) adding 0.1-0.4 part of polycarboxylic acid water reducing agent and 35 parts of water into graphene oxide powder or turbid liquid according to the mass ratio, uniformly stirring, and performing ultrasonic dispersion for 1-3 minutes to obtain graphene oxide mixed liquid;
3) weighing 60-100 parts of raw soil, 5-15 parts of cement, 5-20 parts of fly ash and 5-15 parts of slag in the solid raw materials according to the mass ratio, and uniformly mixing the raw soil, the cement, the fly ash and the slag;
4) mixing the graphene oxide mixed solution obtained in the step 2) with a solid raw material, slowly stirring for 3 minutes, and quickly stirring for 3 minutes to fully and uniformly stir the graphene oxide mixed solution and the solid raw material, so as to obtain the graphene oxide modified raw soil matrix composite.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1) compared with raw soil base materials which only use cement or mineral admixtures, the graphene oxide can excite the hydration reaction of the cement and the mineral admixtures, so that the hydration process can be regulated, the flexural strength, the compressive strength and the toughness of the raw soil base materials are obviously improved, and the shrinkage rate is reduced; the flexural strength of the graphene oxide modified raw soil matrix composite material is not less than 2.4MPa, and the compressive strength is not less than 3.2 MPa.
2) The filling effect and the bridging effect of the graphene oxide can optimize the microstructure of the raw soil-based material, so that the durability of the raw soil-based material is obviously improved.
3) The graphene oxide and other nano materials are used for raw soil modification, and a new research direction is provided for improving raw soil base materials.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
fig. 1 is a schematic diagram comparing the flexural strength of a graphene oxide modified raw soil-based material with the content of graphene oxide concentration in an example of the present invention.
Fig. 2 is a comparison diagram of the relationship between the compressive strength and the content of the graphene oxide concentration of the graphene oxide modified raw soil-based material in the example of the present invention.
Fig. 3 is a comparative schematic diagram of flexural strength and age relationship of graphene oxide modified raw soil-based material in an example of the present invention.
Fig. 4 is a comparative illustration of compressive limit versus age for graphene oxide modified raw soil-based materials in an example of the invention.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
The nano modification method of the graphene oxide modified raw soil-based material comprises the following steps:
1) weighing 0.03-0.12 part of graphene oxide powder or turbid liquid according to the mass ratio;
2) adding 0.1-0.4 part of polycarboxylic acid water reducing agent and 35 parts of water into graphene oxide powder or turbid liquid according to the mass ratio, uniformly stirring, and performing ultrasonic dispersion for 1-3 minutes to obtain graphene oxide mixed liquid;
3) weighing 60-100 parts of loess, 5-15 parts of cement, 5-20 parts of fly ash and 5-15 parts of slag in the solid raw materials according to the mass ratio, and uniformly mixing the loess, the cement, the fly ash and the slag;
4) mixing the graphene oxide mixed solution obtained in the step 2) with a solid raw material, slowly stirring for 3 minutes, and quickly stirring for 3 minutes to fully and uniformly stir the graphene oxide mixed solution and the solid raw material, so as to obtain the graphene oxide modified raw soil matrix composite.
The invention is further illustrated by the following different examples.
Example 1
1) Taking 0.03 part of graphene oxide powder or turbid liquid;
2) adding 0.2 part of polycarboxylic acid water reducing agent and 35 parts of water into graphene oxide powder or turbid liquid, uniformly stirring, and performing ultrasonic dispersion for 2 minutes to obtain graphene oxide mixed liquid;
3) taking 75 parts of loess, 5 parts of cement, 5 parts of fly ash and 6 parts of slag, and uniformly mixing the loess, the cement, the fly ash and the slag;
4) and mixing the graphene oxide mixed solution with the solid raw material, slowly stirring for 3 minutes, quickly stirring for 3 minutes, and fully and uniformly stirring to obtain the graphene oxide modified raw soil matrix composite material.
Example 2
1) Taking 0.06 part of graphene oxide powder or turbid liquid;
2) adding 0.2 part of polycarboxylic acid water reducing agent and 35 parts of water into graphene oxide powder or turbid liquid, uniformly stirring, and performing ultrasonic dispersion for 3 minutes to obtain graphene oxide mixed liquid;
3) taking 60 parts of loess, 10 parts of cement, 9 parts of fly ash and 5 parts of slag, and uniformly mixing the loess, the cement, the fly ash and the slag;
4) and mixing the graphene oxide mixed solution with the solid raw material, slowly stirring for 3 minutes, quickly stirring for 3 minutes, and uniformly stirring to obtain the graphene oxide modified raw soil matrix composite.
Example 3
1) Taking 0.09 part of graphene oxide powder or turbid liquid;
2) adding 0.4 part of polycarboxylic acid water reducer and 35 parts of water into graphene oxide powder or turbid liquid, uniformly stirring, and performing ultrasonic dispersion for 3 minutes to obtain graphene oxide mixed liquid;
3) taking 85 parts of loess, 12 parts of cement, 15 parts of fly ash and 15 parts of slag, and uniformly mixing the loess, the cement, the fly ash and the slag;
4) and mixing the graphene oxide mixed solution with the solid raw material, slowly stirring for 3 minutes, quickly stirring for 3 minutes, and uniformly stirring to obtain the graphene oxide modified raw soil matrix composite.
Example 4
1) Taking 0.12 part of graphene oxide powder or turbid liquid;
2) adding 0.1 part of polycarboxylic acid water reducing agent and 35 parts of water into graphene oxide powder or turbid liquid, uniformly stirring, and performing ultrasonic dispersion for 1 minute to obtain graphene oxide mixed liquid;
3) taking 100 parts of loess, 15 parts of cement, 20 parts of fly ash and 10 parts of slag, and uniformly mixing the loess, the cement, the fly ash and the slag;
4) and mixing the graphene oxide mixed solution with the solid raw material, slowly stirring for 3 minutes, quickly stirring for 3 minutes, and uniformly stirring to obtain the graphene oxide modified raw soil matrix composite.
The following is a comparison of comparative examples with examples of the present invention to further illustrate the effects of the present invention.
The results of the performance tests of the examples and comparative examples are shown in Table 1.
TABLE 1 comparison of Properties
| Comparative example | Example 1 | Example 2 | Example 3 | Example 4 | |
| Flexural strength, MPa | 1.6 | 2.1 | 2.15 | 2.3 | 2.4 |
| Compressive strength, MPa | 2.6 | 2.85 | 2.86 | 3.1 | 3.2 |
The flexural strength and compressive strength of examples 1 to 4 and comparative example (the raw soil-based material without graphene oxide (other components being the same)) were tested, and as shown in fig. 1, 2, 3, and 4, the flexural strength and compressive strength of the graphene oxide modified raw soil-based composite material were not less than 2.4MPa and not less than 3.2 MPa. As can be seen from fig. 1 and 2, as the content of graphene oxide increases within a certain range, the flexural strength and compressive strength of the raw soil-based material also increase: as can be seen from fig. 3 and 4, the flexural strength and compressive strength of the examples 1 to 4 with the added graphene oxide are significantly improved compared to those of the raw soil-based material without the added graphene oxide. Compared with the raw soil base material singly doped with the common cement, the bending strength of the composite material doped with the graphene oxide can be improved by 50%, and the compressive strength can be improved by 23%. Therefore, the invention is used for preparing the raw soil-based composite material with excellent mechanical property.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (6)
1. The graphene oxide modified raw soil-based material is characterized by comprising the following raw materials in percentage by mass:
solid raw materials:
60-100 parts of raw soil, 5-15 parts of cement, 5-20 parts of fly ash and 5-15 parts of slag;
0.03-0.1 part of graphene oxide;
0.1-0.4 part of polycarboxylic acid water reducing agent;
35 parts of water.
2. The graphene oxide-modified raw soil-based material according to claim 1, wherein the raw soil is loess.
3. The graphene oxide-modified raw soil-based material of claim 1, wherein the cement is Portland cement.
4. The graphene oxide modified raw soil-based material of claim 1, wherein the graphene oxide is a graphene oxide powder or suspension with a purity of more than 99% and a particle thickness of 0.1-1 nm.
5. The method for nano-modification of a graphene oxide-modified raw soil-based material according to any one of claims 1 to 4, comprising the steps of:
1) weighing 0.03-0.12 part of graphene oxide powder or turbid liquid according to the mass ratio;
2) adding 0.1-0.4 part of polycarboxylic acid water reducing agent and 35 parts of water into graphene oxide powder or turbid liquid according to the mass ratio, uniformly stirring, and performing ultrasonic dispersion for 1-3 minutes to obtain graphene oxide mixed liquid;
3) weighing 60-100 parts of raw soil, 5-15 parts of cement, 5-20 parts of fly ash and 5-15 parts of slag in the solid raw materials according to the mass ratio, and uniformly mixing the raw soil, the cement, the fly ash and the slag;
4) mixing the graphene oxide mixed solution obtained in the step 2) with a solid raw material, slowly stirring for 3 minutes, and quickly stirring for 3 minutes to fully and uniformly stir the graphene oxide mixed solution and the solid raw material, so as to obtain the graphene oxide modified raw soil matrix composite.
6. The method for nano-modification of a graphene oxide-modified raw soil-based material according to claim 5, wherein the flexural strength and compressive strength of the graphene oxide-modified raw soil-based composite material are respectively not less than 2.4MPa and not less than 3.2 MPa.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241983A (en) * | 2013-05-22 | 2013-08-14 | 陕西科技大学 | Preparation method of graphene oxide modified polycarboxylic acid type water-reducer |
| CN104876204A (en) * | 2015-05-21 | 2015-09-02 | 东南大学 | Method for modifying graphene oxide |
| AU2016334413A1 (en) * | 2015-10-09 | 2018-05-10 | Ossiform Aps | Feedstock for 3D printing and uses thereof |
| CN108049521A (en) * | 2017-12-20 | 2018-05-18 | 扬州大学 | A kind of assembled wall structure of the assembled light raw-soil and bionical soil RPC materials |
-
2020
- 2020-05-11 CN CN202010393906.XA patent/CN111377694A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241983A (en) * | 2013-05-22 | 2013-08-14 | 陕西科技大学 | Preparation method of graphene oxide modified polycarboxylic acid type water-reducer |
| CN104876204A (en) * | 2015-05-21 | 2015-09-02 | 东南大学 | Method for modifying graphene oxide |
| AU2016334413A1 (en) * | 2015-10-09 | 2018-05-10 | Ossiform Aps | Feedstock for 3D printing and uses thereof |
| CN108049521A (en) * | 2017-12-20 | 2018-05-18 | 扬州大学 | A kind of assembled wall structure of the assembled light raw-soil and bionical soil RPC materials |
Non-Patent Citations (2)
| Title |
|---|
| 陈则连等: "《黄土地区铁路勘察设计研究与实践》", 31 August 2019, 中国铁道出版社 * |
| 马晓宇: ""复合矿粉水泥土力学性能及耐久性的试验研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑（月刊）》 * |
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