Marine concrete coating as well as preparation method and application thereof

Abstract

The invention relates to the technical field of marine soil remediation, in particular to a marine concrete coating as well as a preparation method and application thereof. According to the marine concrete coating provided by the invention, the raw materials of the marine concrete coating comprise the cementing material, the sand and the benthic organism shell powder, and the benthic organism shell powder is added into a mixture of the cementing material and the sand, so that slow release of calcium ions in concrete can be promoted; the obtained marine concrete coating contains calcium ions with a certain concentration; calcium ions with proper concentration are favorable for inducing larvae of benthic organisms such as barnacles, sea squirts and the like to adhere and settle; the prepared marine concrete coating has higher compressive strength and tensile strength under the condition of maintaining the basic properties of cement, can achieve the effects of promoting adhesion and growth of benthic organisms, maintaining biodiversity and maintaining ecological balance in the using process, accelerates construction of marine organism communities, and improves the construction efficiency of the marine organism communities. And the damaged marine ecological environment is restored.

Description

Technical Field

[0001] The present application belongs to the field of marine soil remediation technology, and in particular relates to a marine concrete coating and a preparation method and application thereof. Background Art

[0002] The protection of marine resources is inseparable from the development of marine resources. With the continuous expansion of marine development space, the impact and pressure of human activities on the ocean are becoming increasingly apparent. The ocean is facing multiple ecological and environmental crises such as habitat loss, biodiversity reduction, and resource decline.

[0003] Because the shells of shellfish grown in seawater and salt water usually contain more ionic elements, such as Cl - 、SO 4 2- The technology of using shells with calcium carbonate as the main component as concrete coarse aggregate usually requires the use of a variety of chemical reagents for modification experiments before using seawater and shells to prepare concrete coarse aggregate. However, due to different organisms having different preferences, the modification process of technologies such as inducing the attachment of marine sessile organisms is complex and specialized, and usually only targets a single type of biological larvae, resulting in poor marine biodiversity, which is not conducive to the construction of marine biological communities and cannot effectively repair the damaged marine ecological environment.

[0004] Therefore, there is an urgent need to provide a method to promote marine ecological restoration and alleviate the decline of marine biodiversity. Summary of the invention

[0005] The purpose of this application is to provide a marine concrete coating and a preparation method and application thereof, aiming to solve the problems of low marine biodiversity and slow construction of marine benthic communities under natural conditions in the prior art.

[0006] In order to achieve the above application purpose, the technical solution adopted in this application is as follows:

[0007] In a first aspect, the present application provides a marine concrete coating, wherein raw materials of the marine concrete coating include cementitious material, sand and benthic organism shell powder, wherein the mass ratio of cementitious material, sand and benthic organism shell powder is 1-1.5:1-1.5:0.2-0.7.

[0008] In some embodiments, the mass ratio of the cementitious material, the sand, and the benthic organism shell powder is 1:1:0.2.

[0009] In some embodiments, the benthic organism shell powder has a particle size of 60-80 mesh.

[0010] In some embodiments, the benthic organism shell powder includes at least one of giant spotted barnacle shell powder, bell-shaped barnacle shell powder, triangular barnacle shell powder, striped barnacle shell powder, and green mussel shell powder.

[0011] In some embodiments, the cementitious material includes at least one of silicate cement, sulfoaluminate cement, silicate cement containing mineral admixtures, sulfoaluminate cement containing mineral admixtures, and alkali-activated cementitious material.

[0012] In some embodiments, the sand comprises at least one of river sand, basalt artificial sand, granite artificial sand, and desalinated sea sand.

[0013] In a second aspect, the present application provides a method for preparing a marine concrete coating, comprising the following steps:

[0014] Providing raw materials according to the above marine concrete coating;

[0015] The cementitious material, sand and benthic organism shell powder are mixed to obtain the marine concrete coating.

[0016] In some embodiments, the step of mixing the cementitious material, sand and benthic shell powder includes: subjecting the cementitious material and sand to a first stirring and mixing treatment for 2 to 3 minutes to obtain a first mixture; and then subjecting the first mixture and benthic shell powder to a second stirring and mixing treatment for 5 to 7 minutes to obtain a marine concrete coating.

[0017] In a third aspect, the present application provides a building material containing a marine concrete coating, and a method for preparing the building material containing a marine concrete coating comprises the following steps:

[0018] Providing the above-mentioned marine concrete coating;

[0019] A building material carrier is provided, the marine concrete coating is coated on the surface of the building material carrier, and then a curing treatment is performed to obtain a building material containing the marine concrete coating.

[0020] In some embodiments, the amount of benthic organisms attached to the surface of building materials containing the marine concrete coating increased by 110% to 280%.

[0021] The first aspect of the present application provides a marine concrete coating, wherein the raw materials of the marine concrete coating include cementitious material, sand and benthic shell powder, wherein benthic shell powder is added to the mixture of cementitious material and sand to promote the slow release of calcium ions in concrete, so that the obtained marine concrete coating contains a certain concentration of calcium ions; an appropriate concentration of calcium ions is conducive to inducing the attachment and settlement of larvae of benthic organisms such as barnacles and tunicates; and benthic shell powder generally has good water resistance and erosion resistance, and the source of benthic shell powder may be more sustainable, so that the local benthic biological resources can be fully utilized. The prepared marine concrete coating has higher compressive strength and tensile strength while maintaining the basic properties of cement. During use, it can promote the attachment and growth of benthic organisms, maintain biodiversity, maintain ecological balance, accelerate the construction of marine biological communities, and repair the damaged marine ecological environment.

[0022] The second aspect of the present application provides a method for preparing marine concrete coatings. The method only requires that the raw materials of the marine concrete coatings be evenly mixed. The method is simple and does not require the use of large instruments and equipment, which is conducive to wide use.

[0023] The third aspect of the present application provides building materials containing marine concrete coatings. The building materials containing marine concrete coatings are obtained by coating the marine concrete coatings on the surface of a building material carrier and then performing a maintenance treatment. The obtained building materials containing marine concrete coatings can promote the attachment and growth of benthic organisms, maintain biodiversity, and maintain ecological balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a brick coated with marine concrete coating provided in Example 1 of the present application.

[0026] Figure 2 This is the attachment condition of benthic organisms on bricks coated with shell powder concrete coating provided in Example 1 of the present application after 45 days. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] In this application, the term "and / or" describes the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0029] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can all mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, c can be single or multiple, respectively.

[0030] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution, some or all of the steps can be executed in parallel or sequentially, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0031] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0032] The weight of the relevant components mentioned in the embodiment description of the present application can not only refer to the specific content of each component, but also represent the proportional relationship between the weights of the components. Therefore, as long as the content of the relevant components is proportionally enlarged or reduced according to the embodiment description of the present application, it is within the scope disclosed in the embodiment description of the present application. Specifically, the mass in the embodiment description of the present application can be μg, mg, g, kg and other mass units known in the chemical industry.

[0033] The terms "first" and "second" are used only for descriptive purposes to distinguish objects such as substances from each other, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. For example, without departing from the scope of the embodiments of the present application, the first XX may also be referred to as the second XX, and similarly, the second XX may also be referred to as the first XX. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0034] A first aspect of an embodiment of the present application provides a marine concrete coating, wherein raw materials of the marine concrete coating include cementitious material, sand and benthic organism shell powder, wherein the mass ratio of the cementitious material, sand and benthic organism shell powder is 1-1.5:1-1.5:0.2-0.7.

[0035] A first aspect of an embodiment of the present application provides a marine concrete coating, wherein the raw materials of the marine concrete coating include cementitious material, sand and benthic shell powder, wherein benthic shell powder is added to the mixture of cementitious material and sand to promote the slow release of calcium ions in concrete, so that the obtained marine concrete coating contains a certain concentration of calcium ions; an appropriate concentration of calcium ions is conducive to inducing the attachment and settlement of larvae of benthic organisms such as barnacles and tunicates; and benthic shell powder generally has good water resistance and erosion resistance, and the source of benthic shell powder may be more sustainable, so that the local benthic biological resources can be fully utilized. The prepared marine concrete coating has higher compressive strength and tensile strength while maintaining the basic properties of cement. During use, it can promote the attachment and growth of benthic organisms, maintain biodiversity, maintain ecological balance, accelerate the construction of marine biological communities, and repair the damaged marine ecological environment.

[0036] Among them, the raw materials of marine concrete coatings also include cementitious materials and sand. The cementitious materials can bond granular or block materials into a whole material through their own physical and chemical effects to make a composite solid material with a certain mechanical strength; further, the sand and gravel mainly play a skeleton role to support the overall structure of concrete, so as to enhance the density and strength of concrete, and help improve the working performance of concrete. The cementitious materials and sand provided are mainly to provide skeleton materials for marine concrete coatings.

[0037] In some embodiments, the cementitious material includes at least one of silicate cement, sulfoaluminate cement, silicate cement containing mineral admixtures, sulfoaluminate cement containing mineral admixtures, and alkali-activated cementitious material.

[0038] In some embodiments, the sand comprises at least one of river sand, basalt artificial sand, granite artificial sand, and desalinated sea sand.

[0039] The mass ratio of cementitious materials, sand and benthic shell powder is 1-1.5: 1-1.5: 0.2-0.7. Controlling the mass of cementitious materials, sand and benthic shell powder can ensure that the obtained marine concrete coating has a certain strength and excellent support and compression resistance; on the other hand, it ensures that the content of benthic shell powder is moderate to control the concentration of calcium ions released from the concrete surface and further improve the attachment effect of benthic organisms.

[0040] In some embodiments, the mass ratio of the cementitious material, the sand, and the benthic organism shell powder is 1:1:0.2.

[0041] In some embodiments, the particle size of the benthic shell powder is 60-80 mesh. In some specific embodiments, the particle size of the benthic shell powder is controlled to be 60 mesh. The particle size of the benthic shell powder is controlled to be moderate to ensure that the benthic shell powder can be mixed evenly with the cementitious material and sand, thereby improving the overall use effect of the material. If the fineness is too high, it will increase the cost and loss to a certain extent. If the fineness is too low, Ca 2+ The sustained-release process is slowed down, resulting in poor effect.

[0042] In some embodiments, the benthic shell powder includes at least one of giant spotted barnacle shell powder, bell-shaped barnacle shell powder, triangular barnacle shell powder, striped barnacle shell powder, and green mussel shell powder. Adding barnacle and mussel shell powder to concrete can promote the Ca 2+ Slow release is conducive to inducing the larvae of benthic organisms such as barnacles and sea squirts to attach, settle and grow; when the community develops to a certain extent, the number of shrimps, crabs and fish will also increase, achieving the role of maintaining biodiversity and ecological balance. It mainly adopts new technology to promote the attachment of marine benthic organisms to improve the ecological environment of the sea area and repair the damaged ecological environment.

[0043] In some specific embodiments, the shell powder of Giant Spotted Barnacles is selected from Giant Spotted Barnacles, which is a marine organism belonging to the Arthropoda phylum, specifically classified as the Barnacle family. The shell is conical, with a diameter usually between 1 and 1.5 cm. There are white longitudinal ribs of varying thickness on the surface of the shell plate, and the intercostal recesses are dark purple or gray-brown. It is widely distributed in different sea areas and can be collected and used.

[0044] The shell powder of giant barnacle is selected from giant barnacle, which is an animal of the genus Giant Barnacle, family Barnacles, genus Sessile, family Arthropoda, class Maxillopoda, kingdom Animalia. It is mainly distributed in waters with high salinity and high transparency of seawater.

[0045] The shell powder of triangular barnacle is selected from triangular barnacle, which is a small barnacle with an inclined conical shell, a peak-to-peak diameter of about 20 mm and a height of 12 mm. The surface of each shell plate is red, with many prominent white longitudinal ribs. The width is wide, with oblique parallel grooves, and its top edge is almost parallel or slightly oblique to the shell bottom. The shell mouth is triangular; it is mostly distributed in waters with high salinity and high seawater transparency.

[0046] The shell powder of barnacles is selected from barnacles, which belong to the phylum Arthropoda, class Maxillopoda, order Sessile, family Barnacles; its shell is conical or tubular, with a smooth surface, a white or cream base color, and purple or gray-brown vertical stripes. The shell of barnacles is conical or tubular, with a smooth surface, a white or cream base color, and bundles of purple or gray-brown vertical stripes; the stripes on the snout and side plates are mostly in 2 bundles, with 2 to 5 stripes in each bundle, and the center and edge parts of the plates often form wider white vertical bands; the shell mouth edge is slightly serrated, the width is wide, the top edge is parallel to the base or slightly oblique, and there are horizontal fine grooves and scattered brown-red spots to form vertical stripes, and they often attach to rocks and underwater buildings in groups.

[0047] Green mussel shell powder comes from green mussel shells. The morphological characteristics of green mussel shells include long oval shells, straight front end, arched back end, hard but brittle shell, slightly pointed dorsal side, arc-shaped ventral side, shell top located at the front end of the shell, shell up to 13 to 14 cm long. The shell skin is green-brown, bright green around the edge, and the inner surface of the shell has a strong pearly luster. It is widely distributed in various sea areas.

[0048] A second aspect of the present application provides a method for preparing a marine concrete coating, comprising the following steps:

[0049] S01. Providing raw materials according to the above-mentioned marine concrete coating;

[0050] S02. Mixing cementitious materials, sand and benthic shell powder to obtain marine concrete coating.

[0051] The second aspect of the embodiment of the present application provides a method for preparing the marine concrete coating. The preparation method only requires that the raw materials of the marine concrete coating be evenly mixed. The preparation method is simple and does not require the use of large instruments and equipment, which is conducive to wide use.

[0052] In step S01, raw materials are provided according to the above-mentioned marine concrete coating; the types of raw materials and the number of portions added are the same as above and will not be described again here.

[0053] In step S02, the cementitious material, sand and benthic shell powder are mixed to obtain a marine concrete coating.

[0054] In some embodiments, the step of mixing the cementitious material, sand and benthic shell powder includes: subjecting the cementitious material and sand to a first stirring and mixing treatment for 2 to 3 minutes to obtain a first mixture; and then subjecting the first mixture and benthic shell powder to a second stirring and mixing treatment for 5 to 7 minutes to obtain a marine concrete coating.

[0055] A third aspect of the embodiment of the present application provides a building material containing a marine concrete coating. The preparation method of the building material containing the marine concrete coating comprises the following steps:

[0056] In step G01, providing the above-mentioned marine concrete coating;

[0057] In step G02, a building material carrier is provided, and the marine concrete coating is coated on the surface of the building material carrier, and then a curing treatment is performed to obtain a building material containing the marine concrete coating.

[0058] The third aspect of the embodiment of the present application provides a building material containing marine concrete coating. The building material containing marine concrete coating is obtained by coating the marine concrete coating on the surface of a building material carrier and then performing a maintenance treatment. The obtained building material containing marine concrete coating can promote the attachment and growth of benthic organisms, maintain biodiversity, and maintain ecological balance.

[0059] In step G01, the above-mentioned marine concrete coating is provided; the specific types and preparation methods are as discussed above, and will not be described again here to save space.

[0060] In step G02, a building material carrier is provided, and the marine concrete coating is coated on the surface of the building material carrier, and then a curing treatment is performed to obtain a building material containing the marine concrete coating.

[0061] In some embodiments, the curing step includes: standard curing for 10 days or curing according to actual conditions.

[0062] In some embodiments, the amount of benthic organisms attached to the surface of building materials containing the marine concrete coating increased by 110% to 280%.

[0063] The following describes the invention in conjunction with specific embodiments.

[0064] Example 1

[0065] Marine concrete coating and its preparation method and application

[0066] The raw materials of marine concrete coating include cementitious materials, sand and benthic shell powder, wherein the cementitious materials are selected from silicate cement, the sand is selected from river sand, the benthic shell powder is selected from giant barnacle shell powder, and the particle size of the giant barnacle shell powder is 60 mesh; the mass ratio of cementitious materials, sand and benthic shell powder is 1:1:0.2.

[0067] Preparation method of marine concrete coating: provide the raw materials of the marine concrete coating disclosed in Example 1, stir the cementitious material and sand for 2 to 3 minutes, then add benthic shell powder and stir for 5 to 7 minutes to obtain the marine concrete coating.

[0068] Application of marine concrete coating: Provide a rough surface of a sample brick of 10cm×20cm, apply the obtained marine concrete coating on the rough surface of the sample brick, and then perform standard curing for ten days (such as Figure 1 The samples were placed in tap water for curing for more than 1 day. Then they were dried at 40°C. The samples were tied to the fishing raft at a suitable location in the Dapeng Peninsula waters of Shenzhen. The samples were located about 1 meter below the sea surface. After the samples were placed for 45 days, they were recovered, photographed, and the benthic organisms on the samples were classified, dried, and weighed (such as Figure 2 shown).

[0069] Example 2

[0070] Marine concrete coating and its preparation method and application

[0071] The raw materials of marine concrete coating include cementitious materials, sand and benthic shell powder, wherein the cementitious material is selected from sulphoaluminate cement, the sand is selected from basalt machine-made sand, the benthic shell powder is selected from giant barnacle shell powder, and the particle size of the giant barnacle shell powder is 60 mesh; the mass ratio of cementitious materials, sand and benthic shell powder is 1:1:0.2.

[0072] Preparation method of marine concrete coating: provide the raw materials of the marine concrete coating disclosed in Example 2, stir the cementitious material and sand for 2 to 3 minutes, then add benthic shell powder and stir for 5 to 7 minutes to obtain the marine concrete coating.

[0073] Application of marine concrete coating: Provide a rough surface of a 10cm×20cm sample brick, apply the obtained marine concrete coating on the rough surface of the sample brick, and then perform standard curing for ten days. Place it in tap water for curing for more than 1 day. Then dry it at 40℃; tie the sample to the fishing raft at a suitable location in the sea area of ​​Dapeng Peninsula, Shenzhen, and the sample is about 1 meter below the sea surface. After the sample is placed for 45 days, the sample is recovered, photographed, and the benthic organisms on the sample are classified, dried and weighed.

[0074] Example 3

[0075] Marine concrete coating and its preparation method and application

[0076] The raw materials of marine concrete coating include cementitious materials, sand and benthic shell powder, wherein the cementitious materials are selected from silicate cement containing mineral admixtures, the sand is selected from granite machine-made sand, the benthic shell powder is selected from a mixture of triangular barnacle shell powder and veined barnacle shell powder, and the particle size of the triangular barnacle shell powder and the veined barnacle shell powder is 60 mesh; the mass ratio of the triangular barnacle shell powder and the veined barnacle shell powder is 1:1, and the mass ratio of the cementitious materials, sand and benthic shell powder is 1:1:0.2.

[0077] Preparation method of marine concrete coating: provide the raw materials of the marine concrete coating disclosed in Example 3, stir the cementitious material and sand for 2 to 3 minutes, then add benthic shell powder and stir for 5 to 7 minutes to obtain the marine concrete coating.

[0078] Application of marine concrete coating: Provide a rough surface of a 10cm×20cm sample brick, apply the obtained marine concrete coating on the rough surface of the sample brick, and then perform standard curing for ten days. Place it in tap water for curing for more than 1 day. Then dry it at 40℃; tie the sample to the fishing raft at a suitable location in the sea area of ​​Dapeng Peninsula, Shenzhen, and the sample is about 1 meter below the sea surface. After the sample is placed for 45 days, the sample is recovered, photographed, and the benthic organisms on the sample are classified, dried and weighed.

[0079] Example 4

[0080] Marine concrete coating and its preparation method and application

[0081] The raw materials of marine concrete coating include cementitious materials, sand and benthic organism shell powder, wherein the cementitious materials are selected from alkali-activated cementitious materials, the sand is selected from basalt machine-made sand, the benthic organism shell powder is selected from green mussel shell powder, and the particle size of the green mussel shell powder is 60 mesh; the mass ratio of cementitious materials, sand and benthic organism shell powder is 1:1:0.2.

[0082] Preparation method of marine concrete coating: provide the raw materials of the marine concrete coating disclosed in Example 4, stir the cementitious material and sand for 2 to 3 minutes, then add benthic shell powder and stir for 5 to 7 minutes to obtain the marine concrete coating.

[0083] Application of marine concrete coating: Provide a rough surface of a 10cm×20cm sample brick, apply the obtained marine concrete coating on the rough surface of the sample brick, and then perform standard curing for ten days. Place it in tap water for curing for more than 1 day. Then dry it at 40℃; tie the sample to the fishing raft at a suitable location in the sea area of ​​Dapeng Peninsula, Shenzhen, and the sample is about 1 meter below the sea surface. After the sample is placed for 45 days, the sample is recovered, photographed, and the benthic organisms on the sample are classified, dried and weighed.

[0084] Comparative Example 1

[0085] Marine concrete coating and its preparation method and application

[0086] The raw materials of the marine concrete coating include cementitious materials and sand, wherein the cementitious materials are selected from alkali-activated cementitious materials, and the sand is selected from basalt machine-made sand; the mass ratio of the cementitious materials to the sand is 1:1.

[0087] Preparation method of marine concrete coating: providing the raw materials of the marine concrete coating disclosed in comparative example 1, stirring the cementitious material and sand for 2 to 3 minutes to obtain the marine concrete coating.

[0088] Application of marine concrete coating: Provide a rough surface of a 10cm×20cm sample brick, apply the obtained marine concrete coating on the rough surface of the sample brick, and then perform standard curing for ten days. Place it in tap water for curing for more than 1 day. Then dry it at 40℃; tie the sample to the fishing raft at a suitable location in the sea area of ​​Dapeng Peninsula, Shenzhen, and the sample is about 1 meter below the sea surface. After the sample is placed for 45 days, the sample is recovered, photographed, and the benthic organisms on the sample are classified, dried and weighed.

[0089] Property testing and result analysis

[0090] The samples of Examples 1 to 4 and Comparative Example 1 were photographed and the benthic organisms on the samples were classified, dried and weighed. The results are shown in Table 1. It can be seen that among the benthic organisms obtained in Comparative Example 1, the average dry weight of barnacles was 557.619 g, the average dry weight of tubeworms was 178.988 g, the average dry weight of bryozoans was 179.702 g, and there was no ascidian; in Example 1 (the benthic organism shell powder was selected from the giant spotted barnacle shell powder group), the average dry weight of barnacles was 1380.262 g, the average dry weight of tubeworms was 265.547 g, the average dry weight of bryozoans was 134.321 g, and the average dry weight of ascidian was 8.678 g; in Example 2 (the benthic organism shell powder was selected from the giant barnacle shell powder group), the average dry weight of barnacles was 1808.464 g, the average dry weight of tubeworms was 264.19 g, the average dry weight of bryozoans was 146.417 g, and the average dry weight of ascidian was 146.700 g. The dry weight is 27.464g; in Example 3 (the benthic shell powder is selected from the mixed shell powder group of triangular barnacles and pattern barnacles), the average dry weight of barnacles is 1224.071g, the average dry weight of tube worms is 169.619g, the average dry weight of bryozoans is 528.107g, and no ascidian growth; in Example 4 (the benthic shell powder is selected from the green mussel shell powder group), the average dry weight of barnacles is 1925.714g, the average dry weight of tube worms is 446.286g, the average dry weight of bryozoans is 122.893g, and the average dry weight of ascidian is 81.5g; it can be seen that the marine concrete coating containing benthic shell powder provided in Examples 1 to 4 can effectively promote the attachment and growth of different types of benthic organisms during use, maintain biodiversity, maintain the role of ecological balance, accelerate the construction of marine biological communities, and repair the damaged marine ecological environment.

[0091] Table 1

[0092]

[0093] In summary, the embodiment of the present application provides a marine concrete coating, wherein the raw materials of the marine concrete coating include cementitious material, sand and benthic shell powder, wherein benthic shell powder is added to the mixture of cementitious material and sand to promote the slow release of calcium ions in concrete, so that the obtained marine concrete coating contains a certain concentration of calcium ions; an appropriate concentration of calcium ions is beneficial to inducing the attachment and settlement of larvae of benthic organisms such as barnacles and tunicates; and benthic shell powder generally has good water resistance and erosion resistance, and the source of benthic shell powder may be more sustainable, so that the local benthic biological resources can be fully utilized. The prepared marine concrete coating has higher compressive strength and tensile strength while maintaining the basic properties of cement. During use, it can promote the attachment and growth of benthic organisms, maintain biodiversity, maintain ecological balance, accelerate the construction of marine biological communities, and repair the damaged marine ecological environment.

[0094] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A marine concrete coating, characterized in that: The raw materials of the marine concrete coating include cementitious material, sand and benthic organism shell powder, wherein the mass ratio of the cementitious material, the sand and the benthic organism shell powder is 1-1.5:1-1.5:0.2-0.

7.

2. The marine concrete coating according to claim 1, characterized in that: The mass ratio of the cementitious material, the sand and the benthic organism shell powder is 1:1:0.

2.

3. The marine concrete coating according to claim 1, characterized in that: The particle size of the benthic organism shell powder is 60-80 meshes.

4. The marine concrete coating according to any one of claims 1 to 3, characterized in that: The benthic organism shell powder includes at least one of giant spotted barnacle shell powder, bell-shaped barnacle shell powder, triangular barnacle shell powder, striped barnacle shell powder, and green mussel shell powder.

5. The marine concrete coating according to any one of claims 1 to 2, characterized in that: The cementitious material comprises at least one of silicate cement, sulphoaluminate cement, silicate cement containing mineral admixtures, sulphoaluminate cement containing mineral admixtures, and alkali-activated cementitious material.

6. The marine concrete coating according to any one of claims 1 to 2, characterized in that: The sand comprises at least one of river sand, basalt machine-made sand, granite machine-made sand and desalinated sea sand.

7. A method for preparing a marine concrete coating, characterized in that: The steps include: Providing raw materials for the marine concrete coating according to any one of claims 1 to 6; The cementitious material, the sand and the benthic organism shell powder are mixed to obtain a marine concrete coating.

8. The method for preparing the marine concrete coating according to claim 7, characterized in that: The step of mixing the cementitious material, the sand and the benthic shell powder comprises: performing a first stirring and mixing treatment on the cementitious material and the sand for 2 to 3 minutes to obtain a first mixture; and then performing a second stirring and mixing treatment on the first mixture and the benthic shell powder for 5 to 7 minutes to obtain a marine concrete coating.

9. A building material containing a marine concrete coating, characterized in that: The method for preparing the building material containing the marine concrete coating comprises the following steps: Providing a marine concrete coating according to any one of claims 1 to 6; A building material carrier is provided, the marine concrete coating is coated on the surface of the building material carrier, and then a curing treatment is performed to obtain a building material containing the marine concrete coating.

10. The building material containing marine concrete coating according to claim 9, characterized in that: The amount of benthic organisms attached to the surface of the building material containing the marine concrete coating increases by 110% to 280%.

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