CN114988828B - Similar material suitable for reef limestone physical model and preparation method and application thereof - Google Patents
Similar material suitable for reef limestone physical model and preparation method and application thereof Download PDFInfo
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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
- C04B28/14—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 calcium sulfate 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0277—Hardening promoted by using additional water, e.g. by spraying water on the green concrete element
- C04B40/0281—Hardening in an atmosphere of increased relative humidity
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00991—Uses not provided for elsewhere in C04B2111/00 for testing
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- 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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- 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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- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
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Abstract
The invention relates to the technical field of geotechnical engineering, and discloses a similar material suitable for a reef limestone physical model, which is prepared from the following raw materials in parts by weight: the cement mortar comprises a part of gypsum, b part of cement, c part of water, d part of cement foaming agent, e part of cement air entraining agent, f part of talcum powder and g part of sea sand, wherein b = 2-3.5 a, c =0.5 (a + b), d =0.01 c-0.055c, e =0.001 (a + b), f =0.1 c-0.25c and g =15f. The invention also discloses a preparation method and an application method of the similar material suitable for the reef limestone physical model. The invention is suitable for similar materials of reef limestone physical models and a preparation method and application thereof, and prepares the reef limestone similar materials by utilizing common building raw materials on the market through a simple and convenient preparation method so as to prepare the similar material model with the physical and mechanical properties similar to those of the reef limestone physical model.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a similar material suitable for a reef limestone physical model and a preparation method and application thereof.
Background
The coral reef is a rock-soil body formed by mutually cementing remains, various reef-attached organisms, some shellfish and algae and the like after the reef-building coral group dies through the combined action of geological deposition, biological destruction, ocean power and the like. The reef limestone is a diagenetic part at the lower part of the coral reef, is a main body part of a coral island reef body, and has a main mineral component of calcium carbonate.
With the implementation of the national ocean strategy, the construction of island engineering is actively and steadily promoted in China. The reef limestone is used as a main body of coral reef rock soil and is a foundation and foothold for island reef engineering construction, and the physical characteristics and the engineering properties of the reef limestone determine the stability of various engineering constructions, so that the study on the reef limestone is a necessary and primary condition in the coral reef engineering construction.
Due to the fact that the coral reefs are located in special geographical positions, research on reef limestone at the present stage still stays at the primary stage. Actually, coral reefs with biological causes have physical and mechanical characteristics of low density, easy crushing, low strength, high porosity, high compressibility and the like, and the characteristics enable reef limestone to have great difference with conventional land-source rocks, so that before island and reef engineering construction is carried out, whether the island and reef engineering has construction feasibility must be researched by establishing a corresponding similar physical model of the island and reef engineering, and in order to ensure experimental accuracy and reduce the influence of a scale effect, the physical model and an island and reef engineering prototype have similar physical and mechanical phenomena, and the scale of the physical model and the prototype should be as large as possible within an experimental allowable range.
Since the reef limestone sediment sample is difficult to collect and high in cost, large-scale massive reef limestone which can be used for manufacturing a physical model is difficult to directly collect in nature at the present stage, and therefore, a similar material suitable for the reef limestone physical model is urgently needed in order to smoothly carry out relevant physical model experiments of the reef limestone.
Disclosure of Invention
The invention aims to provide a similar material suitable for a reef limestone physical model and a preparation method and application thereof aiming at the defects of the technology.
In order to achieve the purpose, the similar material suitable for the reef limestone physical model is prepared from the following raw materials in parts by weight: the cement mortar comprises a part of gypsum, b part of cement, c part of water, d part of cement foaming agent, e part of cement air entraining agent, f part of talcum powder and g part of sea sand, wherein b =2 a-3.5 a, c =0.5 (a + b), d =0.01 c-0.055c, e =0.001 (a + b), and f =0.1 c-0.25c, and g =15f.
Preferably, the mesh number of the gypsum is 1200 meshes to 1800 meshes.
Preferably, the cement is p.o 42.5 high strength portland cement.
Preferably, the water is distilled water or purified water.
Preferably, the cement foaming agent is a plant source composite foaming agent.
Preferably, the cement air entraining agent is a high molecular polymer air entraining agent.
Preferably, the mesh number of the talcum powder is 800 meshes to 1250 meshes, and the particle size of the talcum powder is 10 mu m to 15 mu m.
Preferably, the particle size of the sea sand is 0.8 mm-1.5 mm.
A preparation method of similar materials suitable for the reef limestone physical model comprises the following steps:
a) Preparing raw materials according to the weight part ratio;
b) Mixing the water and the cement foaming agent together, and fully stirring the water and the cement foaming agent by using a foaming machine or a stirrer until bubbles are not generated any more to form a first solution;
c) Pouring the cement and the cement air entraining agent into the first solution formed in the step B), and fully stirring by using a stirrer until the cement has good fluidity and workability to form cement paste;
d) Sequentially pouring the talcum powder, the gypsum and the sea sand into the cement paste formed in the step C), and fully stirring by using a stirrer until the mixture is uniformly stirred to prepare a second solution;
e) Pouring the second solution prepared in the step D) into a mould, performing compression molding, demolding, and maintaining for 28 days at the maintenance temperature: and curing at 18-22 ℃ with the curing humidity of more than or equal to 90% to prepare the similar material suitable for the reef limestone physical model.
The similar material suitable for the reef limestone physical model is made into a similar material model with similar physical and mechanical properties to those of the reef limestone physical model.
Compared with the prior art, the invention has the following advantages: the method is characterized in that reef limestone similar materials are prepared by utilizing common building raw materials on the market through a simple and convenient manufacturing method, and then similar material models with physical and mechanical properties similar to those of reef limestone physical models are manufactured, so that the problems that large block reef limestone which can be used for manufacturing physical models is difficult to directly adopt in the nature at the present stage due to large difficulty and high cost in adopting reef limestone sediment samples are solved.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
According to a large number of experimental studies, reef limestone can be divided into four main categories according to the apparent differences in apparent porosity: weak glue dense type, strong glue dense type, weak glue loose type and strong glue loose type. According to experimental test data, the physical parameters of the four main categories are as follows:
the density of the weakly cemented dense reef-like limestone is about 0.93-1.17 (g/cm)3) The porosity is about 56.13-67.64%, the compressive strength is about 5.73-13.39 (MPa), and the elastic modulus is about 4.12-7.4 (Gpa);
the density of the strong adhesive compact is about 1.14 to 2.06 (g/cm)3) Porosity of 25.35-59.64%, compression strength of 9.64-30.25 MPa, and elastic modulus of 6.01-18.26 Gpa;
the weak cementation loose class density is about 1.02 to 1.81 (g/cm)3) Porosity of 58.12-75.79%, compression strength of 1.47-3.9 MPa and elastic modulus of 0.66-3.05 Gpa;
the density of the strong adhesive bond loose class is about 0.94-1.49 (g/cm)3) The porosity is about 46.57%62.49 percent, compressive strength of about 1.96 to 8.34 (Mpa) and elastic modulus of about 1.42 to 8.06 (Gpa).
In addition, in the reef limestone model experiment, the geometric scale of the model and the prototype is usually 1.
In the invention, the ratio of water to the sum of cement and gypsum is defined as water-cement ratio, i.e. c/(a + b) =0.5, the ratio of talcum powder to sea sand is defined as fine aggregate ratio, i.e. g/f = 1.
Example one
A similar material suitable for a reef limestone physical model is prepared by selecting 1250-mesh talcum powder with the particle size of 10 mu m, 1500-mesh gypsum, sea sand with the particle size of 1.0mm, purified water, P.O 42.5 high-strength portland cement as cement, a plant-source composite foaming agent as a cement foaming agent, and a high-molecular polymer air entraining agent as a cement air entraining agent, wherein the water-cement ratio is 0.5, the fine-aggregate ratio is 1.
The raw materials are prepared according to the following steps:
a) Preparing raw materials according to the weight part ratio;
b) Mixing water and a cement foaming agent together, and fully stirring the water and the cement foaming agent by using a foaming machine or a stirrer until bubbles are not generated any more to form a first solution;
c) Pouring cement and a cement air entraining agent into the first solution formed in the step B), and fully stirring by using a stirrer until the cement has good fluidity and workability to form cement paste;
d) Sequentially pouring talcum powder, gypsum and sea sand into the cement paste formed in the step C), and fully stirring by using a stirrer until the mixture is uniformly stirred to prepare a second solution;
e) Pouring the second solution prepared in the step D) into a mould, performing compression molding, demolding, and curing, wherein the curing time is 28 days, and the curing temperature is as follows: and maintaining at 18 ℃ and maintaining humidity more than or equal to 90% to prepare the similar material suitable for the reef limestone physical model.
Similar materials prepared in the embodiment are made into similar material models with physical and mechanical properties similar to those of the physical model of the reef limestone, physical and mechanical parameters of the similar material models are matched with the weakly cemented dense reef limestone-like model, and specific measurement results are shown in table 1:
TABLE 1
| Physical and mechanical parameters | Density of | Porosity of the material | Compressive strength | Modulus of elasticity |
| Reef limestone and original rock parameters | 0.93～1.17 | 56.13％～67.64％ | 5.73～13.39 | 4.12～7.4 |
| Similar scale | 1:1 | 1:1 | 1:25 | 1:25 |
| Similar material parameters | 1.05 | 63.02％ | 0.47 | 0.21 |
| Whether it meets the requirements | Is that | Is that | Is that | Is that |
According to the test result, all parameters of the similar materials can meet the experimental requirements of the similar model, so that the similar materials prepared by the mixing ratio meet the requirements.
Example two
A similar material suitable for a reef limestone physical model is prepared by selecting 800-mesh talcum powder with the particle size of 15 microns, 1200-mesh gypsum, sea sand with the particle size of 1.5mm, distilled water as water, P.O 42.5 high-strength portland cement as cement, a plant-source composite foaming agent as a cement foaming agent, and a high-molecular polymer air entraining agent as a cement air entraining agent, wherein the water-cement ratio is 0.5, the fine-aggregate ratio is 1.
The raw materials are prepared according to the following steps:
a) Preparing raw materials according to the weight part ratio;
b) Mixing water and a cement foaming agent together, and fully stirring the water and the cement foaming agent by using a foaming machine or a stirrer until bubbles are not generated any more to form a first solution;
c) Pouring cement and a cement air entraining agent into the first solution formed in the step B), and fully stirring by using a stirrer until the cement has good fluidity and workability to form cement paste;
d) Sequentially pouring talcum powder, gypsum and sea sand into the cement paste formed in the step C), and fully stirring by using a stirrer until the mixture is uniformly stirred to prepare a second solution;
e) Pouring the second solution prepared in the step D) into a mould, performing compression molding, demolding, and curing, wherein the curing time is 28 days, and the curing temperature is as follows: and maintaining at 22 ℃ and maintaining humidity more than or equal to 90% to prepare the similar material suitable for the reef limestone physical model.
Similar materials prepared in the embodiment are made into similar material models with physical and mechanical properties similar to those of the reef limestone physical model, physical and mechanical parameters of the similar material models are matched with the strong-adhesion dense reef-like limestone model, and specific measurement results are shown in table 2:
TABLE 2
| Physical and mechanical parameters | Density of | Porosity factor | Compressive strength | Modulus of elasticity |
| Reef limestone and original rock parameters | 1.14～2.06 | 25.35％～59.64％ | 9.64～30.25 | 6.01～18.26 |
| Similar scale | 1:1 | 1:1 | 1:25 | 1:25 |
| Similar material parameters | 1.72 | 41.51％ | 1.02 | 0.56 |
| Whether it meets the requirements | Is that | Is that | Is that | Is that |
According to the test result, all parameters of the similar materials can meet the experimental requirements of the similar model, so that the similar materials prepared by the mixing proportion meet the requirements.
EXAMPLE III
A similar material suitable for a reef limestone physical model is prepared by selecting 1250-mesh talcum powder with the particle size of 10 mu m, 1200-mesh gypsum, sea sand with the particle size of 1.0mm, purified water, P.O 42.5 high-strength portland cement as cement, a plant-source composite foaming agent as a cement foaming agent, and a high-molecular polymer air entraining agent as a cement air entraining agent, wherein the water-cement ratio is 0.5, the fine-aggregate ratio is 1.
The preparation method comprises the following steps:
a) Preparing raw materials according to the weight part ratio;
b) Mixing water and a cement foaming agent together, and fully stirring the water and the cement foaming agent by using a foaming machine or a stirrer until bubbles are not generated any more to form a first solution;
c) Pouring cement and a cement air entraining agent into the first solution formed in the step B), and fully stirring by using a stirrer until the cement has good fluidity and workability to form cement paste;
d) Sequentially pouring talcum powder, gypsum and sea sand into the cement paste formed in the step C), and fully stirring by using a stirrer until the mixture is uniformly stirred to prepare a second solution;
e) Pouring the second solution prepared in the step D) into a mould, performing compression molding, demolding, and curing, wherein the curing time is 28 days, and the curing temperature is as follows: and (4) curing at 20 ℃ with the curing humidity of more than or equal to 90% to obtain the similar material suitable for the reef limestone physical model.
Similar materials prepared in the embodiment are made into similar material models with physical and mechanical properties similar to those of the reef limestone physical model, physical and mechanical parameters of the similar material models are matched with the weakly cemented loose reef-like limestone model, and specific measurement results are shown in table 3:
TABLE 3
| Physical mechanical parameters | Density of | Porosity of the material | Compressive strength | Modulus of elasticity |
| Reef limestone and original rock parameters | 1.02～1.81 | 58.12％～75.79％ | 1.47～3.9 | 0.66～3.05 |
| Similar scale | 1:1 | 1:1 | 1:25 | 1:25 |
| Similar material parameters | 1.54 | 70.11％ | 0.12 | 0.09 |
| Whether it meets the requirements | Is that | Is that | Is that | Is that |
According to the test result, all parameters of the similar materials can meet the experimental requirements of the similar model, so that the similar materials prepared by the mixing proportion meet the requirements.
Example four
A similar material suitable for reef limestone physical models is prepared by selecting 800-mesh talcum powder with the particle size of 15 microns, 1800-mesh gypsum, sea sand with the particle size of 0.8m, purified water, P.O 42.5 high-strength portland cement as cement, a plant source composite foaming agent as a cement foaming agent, and a high-molecular polymer air entraining agent as a cement air entraining agent, wherein the water-cement ratio is 0.5, the fine-aggregate ratio is 1.
The raw materials are prepared according to the following steps:
a) Preparing raw materials according to the weight part ratio;
b) Mixing water and a cement foaming agent together, and fully stirring the water and the cement foaming agent by using a foaming machine or a stirrer until bubbles are not generated any more to form a first solution;
c) Pouring cement and a cement air entraining agent into the first solution formed in the step B), and fully stirring by using a stirrer until the cement has good fluidity and workability to form cement paste;
d) Sequentially pouring talcum powder, gypsum and sea sand into the cement paste formed in the step C), and fully stirring by using a stirrer until the mixture is uniformly stirred to prepare a second solution;
e) Pouring the second solution prepared in the step D) into a mould, performing compression molding, demolding, and curing, wherein the curing time is 28 days, and the curing temperature is as follows: and (4) curing at 20 ℃ with the humidity of more than or equal to 90% to obtain the similar material suitable for the reef limestone physical model.
Similar materials prepared in the embodiment are made into similar material models with physical and mechanical properties similar to those of reef limestone physical models, physical and mechanical parameters of the similar material models are matched with strong-cementation loose reef limestone models, and specific measurement results are shown in a table 4:
TABLE 4
| Physical mechanical parameters | Density of | Porosity of the material | Compressive strength | Modulus of elasticity |
| Reef ashOriginal rock parameters | 0.94～1.49 | 46.57％～62.49％ | 1.96～8.34 | 1.42～8.06 |
| Similar scale | 1:1 | 1:1 | 1:25 | 1:25 |
| Similar material parameters | 1.19 | 53.41％ | 0.29 | 0.27 |
| Whether it meets the requirements | Is that | Is that | Is that | Is that |
According to the test result, all parameters of the similar materials can meet the experimental requirements of the similar model, so that the similar materials prepared by the mixing proportion meet the requirements.
Comparative example 1
A similar material suitable for a reef limestone physical model is prepared by selecting 1250-mesh talcum powder with the particle size of 10 mu m, 1500-mesh gypsum, sea sand with the particle size of 1.0mm, purified water, P.O 42.5 high-strength portland cement as cement, a plant-source composite foaming agent as a cement foaming agent, and a high-molecular polymer air entraining agent as a cement air entraining agent, wherein the water-cement ratio is 0.5, the fine-aggregate ratio is 1.
The raw materials are prepared according to the following steps:
a) Preparing raw materials according to the weight part ratio;
b) Mixing water and a cement foaming agent together, and fully stirring the water and the cement foaming agent by using a foaming machine or a stirrer until bubbles are not generated any more to form a first solution;
c) Pouring cement and a cement air entraining agent into the first solution formed in the step B), and fully stirring by using a stirrer until the cement has good fluidity and workability to form cement paste;
d) Sequentially pouring talcum powder, gypsum and sea sand into the cement paste formed in the step C), and fully stirring by using a stirrer until the mixture is uniformly stirred to prepare a second solution;
e) Pouring the second solution prepared in the step D) into a mould, performing compression molding, demolding, and curing, wherein the curing time is 28 days, and the curing temperature is as follows: and (4) curing at 20 ℃ with the curing humidity of more than or equal to 90% to obtain the similar material suitable for the reef limestone physical model.
The similar materials prepared in this example were subjected to physical mechanical parameter testing, and the specific measurement results are shown in table 5:
TABLE 5
| Physical mechanical parameters | Density of | Porosity of the material | Compressive strength | Modulus of elasticity |
| Reef limestone and proto-rock parameters | 0.93～2.06 | 25.35％～75.79％ | 1.47～30.25 | 0.66～74 |
| Similar scale | 1:1 | 1:1 | 1:25 | 1:25 |
| Similar material parameters | 0.76 | 81.22％ | 0.05 | 0.03 |
| Whether it meets the requirements | Whether or not | Whether or not | Whether or not | Is that |
According to the test results, most parameters of similar materials can not meet the experimental requirements of similar models, so that the similar materials prepared by the mixing ratio do not meet the requirements.
Comparative example No. two
A similar material suitable for reef limestone physical models is prepared by selecting 1250-mesh talcum powder with the grain size of 10 microns, 1500-mesh gypsum, sea sand with the grain size of 1.0mm, purified water, P.O 42.5 high-strength portland cement as cement, a plant source composite foaming agent as a cement foaming agent, and a high-molecular polymer air entraining agent as a cement air entraining agent, wherein the water-cement ratio is 0.5, the fine-aggregate ratio is 1.
The raw materials are prepared according to the following steps:
a) Preparing raw materials according to the weight part ratio;
b) Mixing water and a cement foaming agent together, and fully stirring the water and the cement foaming agent by using a foaming machine or a stirrer until bubbles are not generated any more to form a first solution;
c) Pouring cement and a cement air entraining agent into the first solution formed in the step B), and fully stirring by using a stirrer until the cement has good fluidity and workability to form cement paste;
d) Sequentially pouring talcum powder, gypsum and sea sand into the cement paste formed in the step C), and fully stirring by using a stirrer until the mixture is uniformly stirred to prepare a second solution;
e) Pouring the second solution prepared in the step D) into a mould, performing compression molding, demolding, and curing, wherein the curing time is 28 days, and the curing temperature is as follows: and (4) curing at 20 ℃ with the curing humidity of more than or equal to 90% to obtain the similar material suitable for the reef limestone physical model.
The similar materials prepared in this example were subjected to physical mechanical parameter testing, and the specific measurement results are shown in table 6:
TABLE 6
| Physical mechanical parameters | Density of | Porosity of the material | Compressive strength | Modulus of elasticity |
| Reef limestone and proto-rock parameters | 0.93～2.06 | 25.35％～75.79％ | 1.47～30.25 | 0.66～74 |
| Similar scale | 1:1 | 1:1 | 1:25 | 1:25 |
| Similar material parameters | 2.37 | 19.99％ | 1.18 | 3.62 |
| Whether it meets the requirements | Whether or not | Whether or not | Is that | Whether or not |
According to the test results, most parameters of similar materials can not meet the experimental requirements of similar models, so that the similar materials prepared by the mixing ratio do not meet the requirements.
The invention is suitable for similar materials of reef limestone physical models and a preparation method and application thereof, prepares reef limestone similar materials by utilizing common building raw materials on the market through a simple and convenient preparation method, further prepares similar material models with similar physical and mechanical properties to those of the reef limestone physical models, and solves the problems that large block reef limestone which can be used for preparing the physical models is difficult to directly adopt in the nature due to large difficulty and high cost in adopting reef limestone sediment samples at the present stage.
Claims (10)
1. A similar material suitable for reef limestone physical model which characterized in that: the feed is prepared from the following raw materials in parts by weight: the cement foaming agent comprises a part of gypsum, b part of cement, c part of water, d part of cement foaming agent, e part of cement air entraining agent, f part of talcum powder and g part of sea sand, wherein b =2 a-3.5a, c =0.5 (a + b), d =0.01 c-0.055c, e =0.001 (a + b), f =0.1 c-0.25c and g =15f.
2. A similar material as claimed in claim 1 adapted for use in a reef limestone physical model wherein: the mesh number of the gypsum is 1200 meshes to 1800 meshes.
3. A similar material as claimed in claim 1 adapted for use in a reef limestone physical model wherein: the cement is P.O 42.5 high-strength portland cement.
4. A similar material as claimed in claim 1 adapted for use in a reef limestone physical model wherein: the water is distilled water or purified water.
5. A similar material as claimed in claim 1 adapted for use in a physical model of reef limestone wherein: the cement foaming agent is a plant source composite foaming agent.
6. A similar material as claimed in claim 1 adapted for use in a physical model of reef limestone wherein: the cement air entraining agent is a high molecular polymer air entraining agent.
7. A similar material as claimed in claim 1 adapted for use in a reef limestone physical model wherein: the mesh number of the talcum powder is 800 meshes to 1250 meshes, and the particle size of the particles is 10 mu m to 15 mu m.
8. A similar material as claimed in claim 1 adapted for use in a reef limestone physical model wherein: the particle size of the sea sand is 0.8 mm-1.5 mm.
9. A method of formulating a similar material suitable for use in a physical model of reef limestone as claimed in claim 1 wherein: the method comprises the following steps:
a) Preparing raw materials according to the weight part ratio;
b) Mixing the water and the cement foaming agent together, and fully stirring the water and the cement foaming agent by using a foaming machine or a stirrer until bubbles are not generated any more to form a first solution;
c) Pouring the cement and the cement air entraining agent into the first solution formed in the step B), and fully stirring by using a stirrer until the cement has good fluidity and workability to form cement paste;
d) Sequentially pouring the talcum powder, the gypsum and the sea sand into the cement paste formed in the step C), and fully stirring by using a stirrer until the mixture is uniformly stirred to prepare a second solution;
e) Pouring the second solution prepared in the step D) into a mould, performing compression molding, demolding, and curing for 28 days at the curing temperature: and curing at 18-22 ℃ with the curing humidity of more than or equal to 90% to prepare the similar material suitable for the reef limestone physical model.
10. A method of using a similar material for a physical model of reef limestone as claimed in claim 1 wherein: and manufacturing the similar material suitable for the reef limestone physical model into a similar material model with similar physical and mechanical properties to those of the reef limestone original rock physical model.
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| DE102010048339B8 (en) * | 2010-09-09 | 2014-05-08 | Crupe International (Ip) Gmbh | Aqueous gypsum-cement mixture, its use, method of constructing a building using the gypsum-cement mixture and building made by the process |
| CN110294617A (en) * | 2019-07-11 | 2019-10-01 | 中国地质大学（武汉） | A kind of sandstone analog material and preparation method thereof based on Frozen-thawed cycled model test |
| CN110642583B (en) * | 2019-10-23 | 2020-11-03 | 山东大学 | Coral sand-crumbs limestone and coral conglomerate-crumbs limestone similar material, and preparation method and application thereof |
| CN112358239B (en) * | 2020-10-27 | 2021-10-01 | 煤炭科学研究总院 | Rock-like similar material and preparation method thereof |
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