Recyclable lightweight fish nest blocks and block components for underwater use

Abstract

This invention provides a lightweight, recyclable fish nest block for underwater use and its assembly, belonging to the field of mechanical technology. It solves the problem of poor stability in existing technologies. The lightweight, recyclable fish nest block for underwater use includes an upper plate, a lower plate, a first support block, and a second support block. The lower plate has a concave-convex connecting portion at its bottom, and the upper plate has a second connecting portion at its top that matches the first connecting portion. The upper end of the first support block is connected to one end of the upper plate, and the lower end of the second support block is connected to one end of the lower plate. The upper end of the second support block is connected to the other end of the upper plate. The upper plate, lower plate, first support block, and second support block form a block unit. The assembly includes the block unit and a bottom beam. The bottom beam is a long column with a rectangular cross-section and is horizontally arranged. The block units are connected adjacently from top to bottom. This lightweight, recyclable fish nest block for underwater use provides ample space for fish to build nests and provides a cavity for comparison with predators. The assembly is easy to assemble and has high stability.

Description

Technical Field

[0001] This invention belongs to the field of building technology and relates to a regenerated lightweight fish nest block for underwater use and its block components. Background Technology

[0002] Underwater recycled lightweight multifunctional fish nest blocks are made from recycled aggregates obtained through processing and crushing of construction waste. While possessing the physical and mechanical properties of traditional fish nest blocks, these blocks are lightweight and have excellent water purification and filtration functions.

[0003] Existing underwater fish nest blocks are made from conventional natural aggregates, which do not have the value of recycling. They are also heavy, inconvenient to construct, and have limited functions, such as water filtration and purification. In addition, the materials are brittle and have low strength.

[0004] Meanwhile, existing underwater fish nest blocks are usually monolithic structures, with adjacent blocks typically connected in direct surface contact. This prevents the existing underwater fish nest blocks from being stacked, resulting in poor applicability. Summary of the Invention

[0005] The first objective of this invention is to address the aforementioned problems in the prior art by providing a regenerative lightweight fish nest block for underwater use, which provides ample space for fish to build nests and avoid predators.

[0006] A second object of the present invention is to provide a block assembly formed from the above-described regenerated lightweight fish nest blocks for underwater use.

[0007] The first objective can be achieved through the following technical solutions:

[0008] A lightweight, recyclable fish nest building block for underwater use, characterized in that it comprises an upper plate, a lower plate, a first support block, and a second support block. The bottom of the lower plate has a convex-concave connecting portion one, and the top of the upper plate has a second connecting portion matching the first connecting portion. The upper end of the first support block is connected to one end of the upper plate, and the lower end of the second support block is connected to one end of the lower plate. The upper end of the second support block is connected to the other end of the upper plate, and the lower end of the second support block is connected to the other end of the lower plate. A cavity is formed between the inner sides of the upper plate, the lower plate, the first support block, and the second support block. The lower part of the upper plate has a protruding positioning portion, which is tightly fitted between the upper ends of the first support block and the upper ends of the second support block. The connection between the first support block and the upper plate has a through cavity two, and the connection between the second support block and the upper plate has a through cavity three.

[0009] This innovative lightweight, regenerated fish nest block for underwater applications connects the upper plate, lower plate, support block one, and support block two together.

[0010] The above structures form three cavities: cavity one, cavity two, and cavity three.

[0011] Specifically: The upper plate, the lower plate, support block one, and support block two form a through cavity one.

[0012] The connection between support block one and the upper plate has a through cavity two.

[0013] The connection between support block two and the upper plate has a through cavity three.

[0014] The performance indicators of the recycled fine aggregate used to make underwater recycled lightweight multifunctional fish nest blocks are as follows: fineness modulus range 2.3-3.0, differential content ≦3.0%, strength ≦10.0%, maximum single-stage crushing value ≦25%, apparent density ≧2350kg / m3, and bulk density ≧1300kg / m3.

[0015] After undergoing multiple processes such as carbonization and nano-modification, the modified recycled aggregate fully meets the above requirements and can meet the performance requirements for producing underwater recycled lightweight multifunctional fish nest blocks.

[0016] Since the positioning part of the upper plate is precisely embedded between the upper ends of support block one and support block two, it can play a role in pre-positioning under the action of the positioning part, ensuring that the upper plate can be stably and accurately connected between support block one and support block two.

[0017] Meanwhile, the aforementioned cavities one, two, and three provide space for fish to build nests underwater and avoid predators.

[0018] In the above-mentioned regenerated lightweight fish nest block for underwater use, the second and third cavities have the same area, and the area of ​​the first cavity is 3 to 8 times that of the second cavity.

[0019] Because the areas of cavity one and cavities two and three are different, cavity one can be used by large fish to build nests and hide from predators, while cavities two and three can be used by small fish to build nests and hide from predators.

[0020] In the above-mentioned regenerated lightweight fish nest block for underwater use, the lower plate is long and the lower part of the lower plate is a flat contact surface one. The connecting part one is a protrusion evenly distributed along the length of the lower plate at one point on the contact surface. The upper plate is long and the upper part of the upper plate is a flat contact surface two. The connecting part two is a recess evenly distributed along the length of the upper plate at the contact surface two. The protrusions and recesses correspond one-to-one.

[0021] When two adjacent blocks are connected, the contact surface one of the upper block and the contact surface two of the lower block are in surface contact. This structure can improve the connection stability of the two adjacent blocks.

[0022] Meanwhile, the protrusion of the upper block is embedded in the recess of the lower block, which further improves the connection stability between the two adjacent blocks.

[0023] In the above-mentioned regenerated lightweight fish nest block for underwater use, the width of the second contact surface is greater than the width of the first contact surface, and the notch is located in the middle of the second contact surface.

[0024] This can appropriately improve the structural compactness of the lower plate.

[0025] Since the width of the second contact surface is greater than the width of the first contact surface, the notch at the second contact surface is closed at both ends to prevent the two adjacent blocks connected vertically from falling off and sliding out from their sides.

[0026] In the above-mentioned regenerated lightweight fish nest block for underwater use, the lower plate has a protruding limiting part in the middle, and the inner sides of the first support block and the second support block abut against the two sides of the limiting part respectively.

[0027] The setting of the limiting part can play a role in pre-positioning, ensuring that the lower end of the support block and the lower end of the second support block can be stably and accurately connected to the set position of the lower plate.

[0028] In the above-mentioned regenerated lightweight fish nest block for underwater use, one end of the lower plate has a through positioning hole, the lower end of the support block has a recessed positioning notch, and it also includes a vertically arranged pin, which passes through the positioning hole and the positioning notch.

[0029] The latch has two functions:

[0030] Firstly, it serves as a connector. Since pin 1 is respectively connected to the lower plate and support block 1, support block 1 can be positioned and connected to the lower plate through pin 1.

[0031] Secondly, it serves as a protruding head; the lower end of the pin matches the protruding head, and it can be used as a protruding head.

[0032] In the above-mentioned regenerated lightweight fish nest block for underwater use, the other end of the lower plate has a through positioning hole 2, the lower end of the support block 2 has a recessed positioning notch 2, and also includes a vertically arranged pin 2, which passes through the positioning hole 2 and the positioning notch 2.

[0033] Pin 2 has two functions:

[0034] Firstly, it serves as a connector. Since pin two is respectively inserted and connected to the lower plate and support block two, support block two can be positioned and connected to the lower plate through pin two.

[0035] Secondly, it serves as a protruding head; the lower end of the pin matches the protruding head, and it can be used as a protruding head.

[0036] In the above-mentioned regenerated lightweight fish nest block for underwater use, the lower end of the pin and the lower end of the second pin are both matched with the protrusion and the lower parts of the three are flush.

[0037] In the above-mentioned regenerated lightweight fish nest block for underwater use, the upper end of the support block 1 has a recessed notch 1, and the lower part of the upper plate has a recessed notch 2. After the upper plate 1 is connected to the support block 1, the notch 1 and the notch 2 form the cavity 2 between the upper plate and the support block 1.

[0038] In the above-mentioned regenerated lightweight fish nest block for underwater use, the upper end of the support block 2 has a recessed notch 3, the lower part of the upper plate has a recessed notch 4, and after the other end of the upper plate is connected to the support block 2, the notch 3 and the notch 4 form the cavity 3 mentioned above between the upper plate and the support block 2.

[0039] The second objective of this invention is achieved through the following technical solution:

[0040] A block assembly, characterized in that the upper plate, lower plate, support block one, and support block two form a block unit. The assembly includes a block unit and a bottom beam. The bottom beam is long and columnar with a rectangular cross-section. The bottom beam is horizontally arranged. The block units are connected adjacently from top to bottom. A plurality of vertical block units along the vertical direction form a block component. The upper part of the bottom beam is a flat contact surface three. The contact surface three has a connecting groove that matches the protrusion. The protrusion of the lower plate of the bottom block unit is connected to the connecting groove.

[0041] The bottom beam is pre-embedded on the seabed, and it has several connecting grooves along its length. Therefore, the protrusions of several block units arranged along the length of the bottom beam are connected to the corresponding connecting grooves, ensuring that the block units are stably connected to the bottom beam along its length.

[0042] Of course, after the bottom block unit is connected to the bottom beam, the two adjacent block units can overlap and connect through the cooperation of the protrusion and the notch.

[0043] In the above-mentioned recycled lightweight fish nest building blocks for underwater use, the recycled lightweight fish nest building blocks include the following components in the following weight ratios: 800-950 parts stone powder, 540-650 parts sunflower seed chips, 320-410 parts nano cement, 150-180 parts activated carbon, reinforcing agent, and modifier.

[0044] The aforementioned stone powder, sunflower seed chips, nano-cement, and activated carbon form a semi-finished material. The reinforcing agent is added at a concentration of 0.4%–0.8% of the total mass of the semi-finished material. The modifier is added at a concentration of 0.5%–0.7% of the total mass of the semi-finished material.

[0045] The aforementioned "sandstone chips" refer to coarse aggregate in concrete with a particle size not exceeding 20mm, commonly known as "sandstone chips," while the professional term is "fine aggregate."

[0046] The reinforcing agent comprises the following components by weight percentage: triethanolamine 5-25%, ethylene glycol 5-25%, sodium acetate or anhydrous sodium acetate 1-10%, urea 10-30%, calcium chloride 5-30%, and calcium lignosulfonate 3-20%.

[0047] The modifier is a styrene-butadiene cement modifier.

[0048] Compared with existing technologies, the regenerated lightweight fish nest blocks used underwater adopt a split structure. Therefore, after the upper plate, lower plate, support block one and support block two are connected, they can naturally form cavity one, cavity two and cavity three within the block unit. Thus, a single block unit provides enough space for fish to build nests and avoid predators.

[0049] At the same time, the cavity size is effective, and there is a corresponding applicable space for both large and small fish, so its applicability is relatively high.

[0050] In addition, several block units in the block assembly can be stably connected to the bottom beam, ensuring that several block units arranged laterally along the bottom beam can also be stably connected, further improving its stability. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the main structure of a recycled lightweight fish nest block for underwater use.

[0052] Figure 2 This is a side view of the structure of a recycled lightweight fish nest block for underwater use.

[0053] Figure 3 This is a top view of the structure of a recycled lightweight fish nest block for underwater use.

[0054] Figure 4 This is a schematic diagram of the main structure of this block assembly.

[0055] In the diagram, 1. Upper plate; 1a. Contact surface two; 1b. Recess; 1c. Notch two; 1d. Notch four; 1e. Positioning part; 2. Lower plate; 2a. Contact surface one; 2b. Protrusion; 2c. Limiting part; 2d. Positioning hole one; 2e. Positioning hole two; 3. Support block one; 3a. Positioning recess one; 3b. Notch one; 4. Support block two; 4a. Positioning recess two; 4b. Notch three; 5. Cavity one; 6. Cavity two; 7. Cavity three; 8. Pin one; 9. Pin two; 10. Bottom beam; 10a. Contact surface three; 10a1. Connecting groove; 11. Avoidance recess. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] It should be noted that when a component is said to be "mounted on" another component, it can be directly mounted on the other component or may be interspersed with a component. When a component is said to be "set on" another component, it can be directly set on the other component or may be interspersed with a component. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or may be interspersed with a component.

[0058] 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 pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] Example 1

[0060] like Figure 1 and Figure 2 and Figure 3As shown, the regenerated lightweight fish nest building block for underwater use includes an upper plate 1, a lower plate 2, a first support block 3, and a second support block 4. The bottom of the lower plate 2 has a concave-convex connecting part 1, and the top of the upper plate 1 has a second connecting part that matches the first connecting part. The upper end of the first support block 3 is connected to one end of the upper plate 1, and the lower end of the first support block 3 is connected to one end of the lower plate 2. The upper end of the second support block 4 is connected to the other end of the upper plate 1, and the lower end of the second support block 4 is connected to the other end of the lower plate 2. A cavity 5 is formed between the inner sides of the upper plate 1, the lower plate 2, the first support block 3, and the second support block 4. The lower part of the upper plate 1 has a protruding positioning part 1e, which is tightly fitted between the upper end of the first support block 3 and the upper end of the second support block 4. The connection between the first support block 3 and the upper plate 1 has a through cavity 2 6, and the connection between the second support block 4 and the upper plate 1 has a through cavity 3 7.

[0061] The second and third cavities have the same area, and the area of ​​the first cavity is 3 to 8 times that of the second cavity.

[0062] The lower plate 2 is long and flat, with a flat contact surface 2a at its lower part. The connecting part 1 consists of protrusions 2b evenly distributed along the length of the lower plate 2 at the contact surface 2a. The upper plate 1 is long and flat, with a flat contact surface 1a at its upper part. The connecting part 2 consists of recesses 1b evenly distributed along the length of the upper plate 1 at the contact surface 1a. The protrusions 2b and recesses 1b correspond one-to-one.

[0063] The width of the second contact surface 1a is greater than the width of the first contact surface 2a, and the notch 1b is located in the middle of the second contact surface 1a.

[0064] The lower plate 2 has a protruding limiting part 2c in the middle, and the inner sides of the first support block 3 and the second support block 4 respectively abut against the two sides of the limiting part 2c.

[0065] The lower plate 2 has a through positioning hole 2d at one end, and the support block 3 has a recessed positioning notch 3a at the lower end. It also includes a vertically arranged pin 8, which passes through the positioning hole 2d and the positioning notch 3a.

[0066] The lower plate 2 has a through positioning hole 2e at the other end, and the support block 4 has a recessed positioning notch 4a at the lower end. It also includes a vertically arranged pin 9, which passes through the positioning hole 2e and the positioning notch 4a.

[0067] The lower ends of pin 8 and pin 9 are both matched with the protrusion 2b, and the lower parts of the three are flush.

[0068] The upper end of the support block 3 has a recessed notch 3b, and the lower part of the upper plate 1 has a recessed notch 1c. After one end of the upper plate 1 is connected to the support block 3, the notch 3b and the notch 1c form the cavity 6 mentioned above between the upper plate 1 and the support block 3.

[0069] The upper end of the support block 2 4 has a recessed notch 3 4b, and the lower part of the upper plate 1 has a recessed notch 4 1d. After the other end of the upper plate 1 is connected to the support block 2 4, the notch 3 4b and the notch 4 1d form the cavity 3 7 between the upper plate 1 and the support block 2 4.

[0070] like Figure 4 As shown, the upper plate 1, lower plate 2, support block 3, and support block 4 form a block unit. This block assembly includes block units and a bottom beam 10. The bottom beam 10 is a long column with a rectangular cross-section. The bottom beam 10 is horizontally arranged. The block units are connected adjacently from top to bottom. Several vertical block units along the vertical direction form a block component. The upper part of the bottom beam 10 is a flat contact surface 3 10a. The contact surface 3 10a has a connecting groove 10a1 that matches the protrusion 2b. The protrusion 2b of the lower plate 2 of the bottommost block unit is connected to the connecting groove 10a1.

[0071] This innovative lightweight, regenerated fish nest block for underwater applications connects the upper plate, lower plate, support block one, and support block two together.

[0072] The above structures form three cavities: cavity one, cavity two, and cavity three.

[0073] Specifically: The upper plate, the lower plate, support block one, and support block two form a through cavity one.

[0074] The connection between support block one and the upper plate has a through cavity two.

[0075] The connection between support block two and the upper plate has a through cavity three.

[0076] The performance indicators of the recycled fine aggregate used to make underwater recycled lightweight multifunctional fish nest blocks are as follows: fineness modulus range 2.3-3.0, differential content ≦3.0%, strength ≦10.0%, maximum single-stage crushing value ≦25%, apparent density ≧2350kg / m3, and bulk density ≧1300kg / m3.

[0077] After undergoing multiple processes such as carbonization and nano-modification, the modified recycled aggregate fully meets the above requirements and can meet the performance requirements for producing underwater recycled lightweight multifunctional fish nest blocks.

[0078] Since the positioning part of the upper plate is precisely embedded between the upper ends of support block one and support block two, it can play a role in pre-positioning under the action of the positioning part, ensuring that the upper plate can be stably and accurately connected between support block one and support block two.

[0079] Meanwhile, the aforementioned cavities one, two, and three provide space for fish to build nests underwater and avoid predators.

[0080] In addition, there is a recessed relief notch 11 in the middle of the support block 3. There are two relief notches 11, and the two relief notches 11 are symmetrically arranged on both sides of the support block 3. This structure allows smaller fish or shrimp to build nests or live in the relief notches 11.

[0081] Of course, a relief notch 11 can also be provided on the support block 4. The structure of the relief notch 11 on the support block 4 is the same as that of the relief notch on the support block 3. Therefore, the structural technical features of the relief notch 11 on the support block 4 will not be described again in the embodiment.

[0082] In this embodiment, the mass ratio of the recycled lightweight fish nest building materials is as follows:

[0083] 800 parts stone powder, 540 parts sunflower seed chips, 320 parts nano cement, 150 parts activated carbon, reinforcing agent, modifier.

[0084] The aforementioned stone powder, sunflower seed chips, nano-cement, and activated carbon form a semi-finished material. The reinforcing agent is added at a rate of 0.4% of the total mass of the semi-finished material. The modifier is added at a rate of 0.5% of the total mass of the semi-finished material.

[0085] The aforementioned "sandwich chips" refer to coarse aggregate in concrete with a particle size not exceeding 20mm, commonly known as "sandwich chips," and technically termed "fine aggregate." In this embodiment, the particle size of the sandwich chips is 18mm.

[0086] In this embodiment, the addition of activated carbon to the block purifies the water around the block, optimizing the nesting and living environment for fish near the block. Of course, the addition of reinforcing agents and modifiers gives the block a relatively high apparent density. Tests show that the compressive strength of the block in this embodiment is greater than MU30, and the apparent density of the block is 1950 kg / m³. 3 ,

[0087] Example 2

[0088] This embodiment is basically the same as the scheme in Embodiment 1, except that the mass ratio of the recycled lightweight fish nest building materials is different.

[0089] Specifically, the ingredients are: 950 parts stone powder, 650 parts sunflower seed chips, 410 parts nano cement, 180 parts activated carbon, reinforcing agent, and modifier.

[0090] The aforementioned stone powder, sunflower seed chips, nano-cement, and activated carbon form a semi-finished material. The reinforcing agent is added at a rate of 0.8% of the total mass of the semi-finished material. The modifier is added at a rate of 0.7% of the total mass of the semi-finished material.

[0091] The aforementioned "sandwich chips" refer to coarse aggregate in concrete with a particle size not exceeding 20mm, commonly known as "sandwich chips," and technically termed "fine aggregate." In this embodiment, the particle size of the sandwich chips is 19mm.

[0092] In this embodiment, the addition of activated carbon to the block purifies the water around the block, optimizing the nesting and living environment for fish near the block. Of course, the addition of reinforcing agents and modifiers gives the block a relatively high apparent density. Tests show that the compressive strength of the block in this embodiment is equal to MU30, and the apparent density of the block is 1920 kg / m³. 3 ,

[0093] Example 3

[0094] This embodiment is basically the same as the scheme in Embodiment 1, except that the mass ratio of the recycled lightweight fish nest building materials is different.

[0095] Specifically, the ingredients are 880 parts stone powder, 590 parts sunflower seed chips, 370 parts nano cement, 160 parts activated carbon, reinforcing agent, and modifier.

[0096] The aforementioned stone powder, sunflower seed chips, nano-cement, and activated carbon form a semi-finished material, with the reinforcing agent dosage being 0.6% of the total mass of the semi-finished material. The modifier dosage is also 0.6% of the total mass of the semi-finished material.

[0097] The aforementioned "sandwich chips" refer to coarse aggregate in concrete with a particle size not exceeding 20mm, commonly known as "sandwich chips," and technically termed "fine aggregate." In this embodiment, the particle size of the sandwich chips is 17mm.

[0098] In this embodiment, the addition of activated carbon to the block purifies the water around the block, optimizing the nesting and living environment for fish near the block. Of course, the addition of reinforcing agents and modifiers gives the block a relatively high apparent density. Tests show that the compressive strength of the block in this embodiment is greater than MU30, and the apparent density of the block is 1910 kg / m³. 3 .

[0099] The technical features of the above-described embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any appropriate changes and variations made to the above embodiments within the essential spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A recycled lightweight fish nest building block for underwater use, characterized in that, The device includes an upper plate, a lower plate, a support block 1, and a support block 2. The lower plate has a convex-concave connecting part 1 at its bottom, and the upper plate has a connecting part 2 at its top that matches the connecting part 1. The upper end of the support block 1 is connected to one end of the upper plate, and the lower end of the support block 1 is connected to one end of the lower plate. The upper end of the support block 2 is connected to the other end of the upper plate, and the lower end of the support block 2 is connected to the other end of the lower plate. A cavity 1 is formed between the inner sides of the upper plate, the lower plate, the support block 1, and the support block 2. The lower part of the upper plate has a protruding positioning part that is tightly fitted between the upper end of the support block 1 and the upper end of the support block 2. The connection between the support block 1 and the upper plate has a through cavity 2, and the connection between the support block 2 and the upper plate has a through cavity 3. The second and third cavities have the same area, and the area of ​​the first cavity is 3 to 8 times the area of ​​the second cavity. The lower plate is long and flat, with a flat contact surface at the bottom. The first connecting part is a protrusion evenly distributed along the length of the lower plate at one point on the contact surface. The upper plate is long and flat, with a flat contact surface at the top. The second connecting part is a recess evenly distributed along the length of the upper plate at the second contact surface. The protrusions and recesses correspond one-to-one. The width of the second contact surface is greater than the width of the first contact surface, and the notch is located in the middle of the second contact surface. The lower plate has a protruding limiting part in the middle, and the inner sides of the first support block and the second support block abut against the two sides of the limiting part respectively. The lower plate has a through positioning hole at one end, and the support block has a recessed positioning notch at one end. It also includes a vertically arranged pin, which passes through the positioning hole and the positioning notch. The lower plate has a through positioning hole 2 at the other end, and the support block 2 has a recessed positioning notch 2 at the lower end. It also includes a vertically arranged pin 2, which passes through the positioning hole 2 and the positioning notch 2. Both the lower end of the first pin and the lower end of the second pin are matched with the protrusion, and the lower parts of the three are flush. The upper end of the support block 1 has a recessed notch 1, and the lower part of the upper plate has a recessed notch 2. After the upper plate 1 is connected to the support block 1, the notch 1 and the notch 2 form the cavity 2 mentioned above between the upper plate and the support block 1. The upper end of the support block 2 has a recessed notch 3, and the lower part of the upper plate has a recessed notch 4. After the other end of the upper plate is connected to the support block 2, notch 3 and notch 4 form the cavity 3 mentioned above between the upper plate and the support block 2. The recycled lightweight fish nest building material comprises the following components in the following weight ratios: 800-950 parts stone powder, 540-650 parts sunflower seed chips, 320-410 parts nano cement, 150-180 parts activated carbon, reinforcing agent, and modifier. The aforementioned stone powder, sunflower seed chips, nano-cement, and activated carbon form a semi-finished material. The reinforcing agent is added at a rate of 0.4%–0.8% of the total mass of the semi-finished material; the modifier is added at a rate of 0.5%–0.7% of the total mass of the semi-finished material. The reinforcing agent has the following components by weight percentage: triethanolamine 5-25%, ethylene glycol 5-25%, sodium acetate or anhydrous sodium acetate 1-10%, urea 10-30%, calcium chloride 5-30%, and calcium lignosulfonate 3-20%. The modifier is a styrene-butadiene cement modifier.

2. A block assembly employing the recycled lightweight fish nest block for underwater use as described in claim 1, characterized in that, The aforementioned upper plate, lower plate, support block one, and support block two form a block unit. This block assembly includes block units and a bottom beam. The bottom beam is a long column with a rectangular cross-section. The bottom beam is horizontally arranged. The block units are connected adjacently from top to bottom. Several vertical block units along the vertical direction form a block component. The upper part of the bottom beam is a flat contact surface three. The contact surface three has a connecting groove that matches the protrusion. The protrusion of the lower plate of the bottom block unit is connected to the connecting groove.

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