Application of alkali-activated concrete in PPVC module building

Abstract

The invention belongs to the technical field of PPVC modular buildings, and particularly relates to application of alkali-activated concrete in the aspect of PPVC modular buildings. The anti-seismic performance of the module body is improved by reasonably configuring the application position of alkali-activated concrete in the module body, and improvement of the anti-seismic performance of the module body is achieved through three ways, one way is that the module body is made to be of a low-gravity-center structure, and due to the fact that the gravity center is lower, the module body is more capable of keeping stable in earthquake disasters; according to the other mode, the module body is provided with a damping shock absorption mechanism through constraint of an alkali-activated concrete structure, the low-gravity-center structural feature of the module body is strengthened while shock absorption is conducted, the vertically-adjacent module bodies can be firmly connected, the shock absorption capacity is achieved, and damage caused by earthquakes is resisted; and finally, a connecting structure using alkali-activated concrete is arranged between the module bodies, the connecting structure has the shock absorption and energy consumption effects under the constraint of the alkali-activated concrete, and the shock resistance of the module bodies is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of PPVC modular buildings, and in particular relates to application of alkali-activated concrete in PPVC modular buildings. Background Art

[0002] Alkali-activated concrete refers to adding a small amount of alkaline metal oxides or hydroxides to concrete to stimulate the silicates in the concrete, promote their hydration, growth and improve the strength and durability of the concrete. According to the degree of weathering of the concrete, alkali-activated concrete can be divided into the following types:

[0003] 1. Ordinary alkali activated concrete

[0004] Ordinary alkali-activated concrete refers to concrete with a small amount of alkaline metal oxides or hydroxides added to it, which activates the silicates in the concrete to improve the strength and durability of the concrete. This type of concrete is suitable for general engineering construction.

[0005] 2. High performance alkali activated concrete

[0006] High-performance alkali-activated concrete is based on ordinary alkali-activated concrete, with appropriate amounts of fly ash, silica fume, sand, stone powder and other materials added to achieve higher strength and durability. This type of concrete is suitable for important engineering construction such as bridges and high-rise buildings.

[0007] 3. Ultra-high performance alkali-activated concrete

[0008] Ultra-high performance alkali-activated concrete refers to the use of finer and purer cement and alkaline metal oxides, as well as appropriate amounts of steel bars and other materials on the basis of high performance alkali-activated concrete to achieve higher strength and durability. This type of concrete is suitable for important engineering construction, such as nuclear power plants, docks, etc.

[0009] Compared with ordinary concrete, alkali-activated concrete has the following characteristics:

[0010] 1.Higher strength and durability

[0011] The addition of alkaline metal oxides or hydroxides can effectively stimulate the reaction of silicates in concrete, promote the hydration and growth of concrete, and thus improve the strength and durability of concrete.

[0012] 2. Better corrosion resistance

[0013] Alkali-activated concrete can effectively reduce the chemical corrosion of concrete and is suitable for use in environments with pollution or the presence of chemically corrosive substances.

[0014] 3. Better earthquake resistance

[0015] Alkali-activated concrete has excellent seismic resistance and can withstand higher load pressures in natural disasters such as earthquakes, reducing damage and losses.

[0016] In practical applications, alkali-activated concrete is widely used in various engineering construction projects such as bridges, high-rise buildings, nuclear power plants, dams, marine engineering, etc., especially buildings and infrastructure with extremely high requirements for strength, durability and earthquake resistance.

[0017] The PPVC space module is a cubic box structure, including four walls, a top plate, and a bottom plate. Several PPVC space modules can be built into a multi-story building or a high-rise building or a building complex.

[0018] PPVC space modules are assembled into complete multi-story buildings, high-rise buildings or building complexes through hoisting. The stability and seismic performance of the structure are related to the safety and service life of the building structure. Existing PPVC space modules are mostly constructed with reinforced concrete of uniform quality. Although they can achieve a certain strength and initially meet the safety requirements, there is still a lot of room for improvement. Summary of the invention

[0019] The invention discloses an application of alkali-activated concrete in PPVC module buildings, and aims to achieve better seismic performance of PPVC modules by further exploring the application of alkali-activated concrete in PPVC module buildings.

[0020] To achieve the above purpose, the technical solution of the present invention is:

[0021] An application of alkali-activated concrete in PPVC module construction, the PPVC module includes a module body with a hexahedral structure, and the application is: by reasonably configuring the application position of the alkali-activated concrete in the module body, the seismic performance of the module body is improved, and the seismic performance of the module body is improved through three ways, one of which is to make the module body a low-center-of-gravity structure, the other is to make the module body have a damping shock-absorbing mechanism through the constraint of the alkali-activated concrete structure, and the shock absorption and the low-center-of-gravity structural characteristics of the module body are strengthened at the same time, and the last one is to make the module bodies have a connection structure using alkali-activated concrete.

[0022] Preferably, in the application, by reasonably configuring the application position of alkali-activated concrete in the module body, the module body becomes a low-center-of-gravity structure. The low-center-of-gravity structure has a lower center of gravity than a module body conventionally prepared with ordinary concrete of uniform mass. By lowering the center of gravity of the module body, the module body is made more stable during an earthquake.

[0023] Preferably, the low center of gravity structure means that: the four side walls of the module body are non-uniform mass structures, and the density gradually decreases from bottom to top, the center of gravity of the module body is lower than the center of gravity of a conventional PPVC space module, and the four side walls of the conventional PPVC space module are uniform mass structures.

[0024] Preferably, the four side walls of the module body are provided with a number of sections from bottom to top, and the density of the sections decreases from bottom to top; the section at the bottom is cast by alkali-activated concrete and a steel cage, and the section at the top is cast by ordinary concrete and a steel cage, and the density of the alkali-activated concrete is greater than that of the ordinary concrete; the section between the bottom section and the top section is cast by mixed alkali-activated concrete and ordinary concrete combined with a steel cage, and the proportion of alkali-activated concrete decreases from bottom to top.

[0025] Preferably, the steel cages of the four side walls are connected to each other into a whole, the weight of the left and right side walls of the module body is the same, and the weight of the front and rear end side walls is the same, the bottom plate of the module body is cast by alkali-activated concrete and steel cage, and the top plate of the module body is cast by ordinary concrete and steel cage, and the thickness of the bottom plate is greater than the thickness of the top plate; the center of gravity of the module body is located on the vertical line of the center of the bottom support surface of the module body.

[0026] Preferably, the application also includes reasonably configuring the use position of alkali-activated concrete in the module body and using a constrained damping mechanism to enable the module body to achieve better seismic performance.

[0027] Preferably, a counterweight beam with a rectangular frame structure is coaxially provided at the lower end of the bottom plate of the module body, and a plurality of damping mechanisms are cross-sectionally and vertically arranged on the inner side of the counterweight beam. The damping mechanism is a damping rod, and a plurality of anti-pull-out plates are welded to the outer wall of the damping rod. The low center of gravity structure of the module body is strengthened by the arrangement of the counterweight beam, and the damping rod is provided so that the module bodies stacked up and down have shock-absorbing performance. A limiting groove cooperating with the counterweight beam is provided at the top of the module body, and the size of the limiting groove matches the counterweight beam. A through casting hole is provided on the bottom plate, and ordinary concrete is cast into the limiting groove where the inner side of the counterweight beam is located through the casting hole to make the adjacent bottom plate and top plate become an integral structure; the damping rod is made of shape memory alloy or low carbon steel.

[0028] Preferably, providing a connection structure using alkali-activated concrete between module bodies means: filling alkali-activated concrete between the side walls of left and right adjacent module bodies, allowing the alkali-activated concrete to cover the connection structure, and connecting the side walls of adjacent module bodies into an integral structure.

[0029] Preferably, the connection structure comprises: a PPVC space module 1 and a PPVC space module 2, a connection structure body is arranged between the opposite side walls of the PPVC space module 1 and the PPVC space module 2, the connection structure body comprises a plurality of grooves 1 respectively arranged in the transverse direction on the surface of one side wall of the PPVC space module, and a plurality of grooves 2 respectively arranged in the transverse direction on the surface of the second side wall of the PPVC space module, the grooves 1 and 2 are staggered with each other, a plurality of U-shaped steel connectors are respectively embedded in the PPVC space module 2 or the wall of one side of the PPVC space module opposite to the groove 1 or the groove 2, the ends of the U-shaped steel connectors at the same height are inserted into the opposite groove 1 or the groove 2, and are connected by transverse connectors, the upper and lower opposite U-shaped steel connectors are connected by longitudinal shock-absorbing brackets, the U-shaped steel connectors of the PPVC space module 1 and the PPVC space module 2 connected by the longitudinal shock-absorbing brackets are arranged alternately, and the opposite side walls of the PPVC space module 1 and the PPVC space module 2 are filled with alkali-activated concrete;

[0030] The U-shaped steel connector comprises a U-shaped steel body with an opening facing upward, one end of the U-shaped steel body is embedded in the side wall of the PPVC space module 1 or the PPVC space module 2 to form an embedded section, and the other end extends into the groove 1 or the groove 2 on the opposite side to form an insertion section, and an intermediate section is formed between the embedded section and the insertion section, a through hole is opened at the bottom of the intermediate section, a plurality of anti-pulling plates are fixedly connected to the upper surface of the bottom of the embedded section, and first connection holes are oppositely provided on the two side walls of the insertion section;

[0031] A plurality of embedded steel plates are evenly distributed in the groove 1 and the groove 2, respectively. One end of the embedded steel plate is embedded in the side wall of the PPVC space module 1 or the PPVC space module 2, and the other end is located in the groove 1 or the groove 2. The embedded steel plate located in the groove 1 or the groove 2 is provided with a second connection hole.

[0032] The transverse connector includes a transverse steel bar that passes through the first connecting hole and the second connecting hole at the same groove 1 or the same groove 2, and the U-shaped steel connector insertion section at the same height is fixedly connected to the side wall of the PPVC space module 1 or the PPVC space module 2 on the opposite side through the transverse steel bar;

[0033] The longitudinal shock-absorbing bracket comprises a plurality of evenly distributed and vertically opposite annular steel bars, the outer walls of the plurality of annular steel bars are welded and fixed by a plurality of longitudinally arranged longitudinal steel bars, a central longitudinal steel bar is arranged at the axis of the annular steel bar, and a plurality of shock-absorbing rods evenly distributed around the central longitudinal steel bar are welded between the central longitudinal steel bar and the inner wall of the annular steel bar;

[0034] The longitudinal shock-absorbing bracket passes through the through holes of a plurality of U-shaped steel connectors that are opposite to each other vertically, and connects and fixes the middle sections of the U-shaped steel connectors of the PPVC space module 1 and the PPVC space module 2 in the same longitudinal column;

[0035] The shock absorbing rod is made of shape memory alloy or low carbon steel;

[0036] The length of the longitudinal shock-absorbing bracket is greater than the height of the PPVC space module 1 and the PPVC space module 2.

[0037] The beneficial effects of the application of the alkali-activated concrete in PPVC modular buildings are as follows:

[0038] The present invention improves the seismic performance of the module body by reasonably configuring the application position of alkali-activated concrete in the module body. Improving the seismic performance of the module body is achieved through three ways. One of them is to make the module body a low-center-of-gravity structure. Due to the lower center of gravity, it is more capable of maintaining stability in earthquake disasters. Another way is to make the module body have a damping shock-absorbing mechanism through the constraint of the alkali-activated concrete structure. The shock absorption and the low-center-of-gravity structural characteristics of the module body are strengthened at the same time, so that the upper and lower adjacent module bodies can be firmly connected and have shock absorption capabilities to resist the damage caused by earthquakes; the last one is to provide a connection structure using alkali-activated concrete between the module bodies. The connection structure has a shock-absorbing and energy-consuming effect under the constraint of the alkali-activated concrete, thereby further improving the seismic performance of the module body. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the three-dimensional structure of the module body of the present invention.

[0040] Figure 2 It is a rear structural schematic diagram of the module body of the present invention.

[0041] Figure 3 It is a schematic diagram of the top view of the module body of the present invention.

[0042] Figure 4 It is a schematic diagram of the bottom view structure of the module body of the present invention.

[0043] Figure 5 It is a schematic diagram of the top view of the structure of the connection between the side walls of the module body of the present invention.

[0044] Figure 6 It is a front view structural schematic diagram of the side wall 1 of the present invention.

[0045] Figure 7 It is a schematic diagram of the side view structure of the connection between the side walls of the module body of the present invention.

[0046] Figure 8 It is a front view structural schematic diagram of the longitudinal shock absorbing bracket of the present invention.

[0047] Fig. 9 It is a schematic diagram of the top view of the longitudinal shock-absorbing bracket of the present invention.

[0048] Fig.10 It is a top view structural schematic diagram of the cooperation between the U-shaped steel connecting piece and the longitudinal shock absorbing bracket of the present invention.

[0049] 1. Module body; 2. Counterweight beam; 3. Damping rod; 4. Limiting groove; 5. Sleeve with internal thread for lifting; 6. Segment; 601. The bottom segment; 602. The second segment; 603. The third segment; 604. The fourth segment; 605. The top segment; 7. Pull-out plate; 8. PPVC space module one; 9. PPVC space module two; 10. U-shaped steel connector; 1001. Through hole; 1002. The first connecting hole; 1003. Pull-out steel plate; 1004. Embedded section; 1005. Insertion section; 11. Longitudinal shock-absorbing bracket; 1101. Longitudinal steel bar; 1102. Annular steel bar; 1103. Central longitudinal steel bar; 1104. Shock-absorbing rod; 12. Transverse steel bar; 13. Embedded steel plate; 14. The second connecting hole; 15. Groove one; 16. Groove two. DETAILED DESCRIPTION

[0050] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0051] The following embodiments may be understood as individually expressing a part of a local structure or method of the present invention, or may be understood as a combination of the embodiments to explain the connotation of a larger structure or method of the present invention.

[0052] Example 1

[0053] An application of alkali-activated concrete in PPVC modular buildings, such as Figure 1-10 As shown, the PPVC module includes a module body 1 with a hexahedral structure, and the application is: improving the seismic performance of the module body 1 by reasonably configuring the application position of the alkali-activated concrete in the module body 1, and improving the seismic performance of the module body 1 is achieved through three ways, one of which is to make the module body 1 a low-center-of-gravity structure, and the other is to make the module body 1 have a damping shock-absorbing mechanism through the constraint of the alkali-activated concrete structure, and the shock absorption and the low-center-of-gravity structural characteristics of the module body 1 are strengthened at the same time, and the last one is to make the module bodies 1 have a connection structure using alkali-activated concrete.

[0054] Example 2

[0055] like Figure 1-4As shown, in the application, by reasonably configuring the application position of the alkali-activated concrete in the module body 1, the module body 1 becomes a low-center-of-gravity structure. The low-center-of-gravity structure has a lower center of gravity than the module body 1 prepared by conventional ordinary concrete of uniform mass. By lowering the center of gravity of the module body 1, the module body 1 is made more stable during an earthquake. The ordinary concrete involved in the present invention refers to the common concrete used in the PPVC construction field, which is different from the alkali-activated concrete.

[0056] like Figure 1 As shown, the low center of gravity structure means that: the four side walls of the module body 1 are non-uniform mass structures, and the density gradually decreases from bottom to top, the center of gravity of the module body 1 is lower than the center of gravity of the conventional PPVC space module, and the four side walls of the conventional PPVC space module are uniform mass structures.

[0057] like Figure 1 As shown, the four side walls of the module body are provided with a plurality of segments 6 from bottom to top, and the density of the plurality of segments 6 decreases from bottom to top; the segment 601 at the bottom is cast by alkali-activated concrete and a steel cage, and the segment 605 at the top is cast by ordinary concrete and a steel cage, and the density of the alkali-activated concrete is greater than that of the ordinary concrete; the segment between the bottom segment 601 and the top segment 605 is cast by mixed alkali-activated concrete and ordinary concrete combined with a steel cage, and the proportion of the alkali-activated concrete used decreases from bottom to top.

[0058] like Figure 1 As shown, the steel cages of the four side walls are connected to each other into a whole, the weight of the left and right side walls of the module body is the same, and the weight of the front and rear end side walls is the same, the bottom plate of the module body 1 is cast by alkali-activated concrete and steel cage, and the top plate of the module body 1 is cast by ordinary concrete and steel cage, and the thickness of the bottom plate is greater than that of the top plate; the center of gravity of the module body 1 is located on the vertical line of the center of the bottom support surface of the module body 1.

[0059] In this embodiment, the four side walls of the conventional PPVC space module are uniform mass structures, usually reinforced concrete structures composed of ordinary concrete combined with steel cages. The center of gravity of this structure is relatively high. Although it meets the structural stability requirements, there is room for further improvement. The present invention is configured such that the four side walls of the module body 1 are non-uniform mass structures, and the density gradually decreases from bottom to top. Therefore, the center of gravity of the module body can be reduced, thereby improving the stability and seismic performance of the PPVC space module.

[0060] In this embodiment, the density of alkali activated concrete is usually 3.1-3.6 g / cm 3The density of ordinary concrete is usually between 2.3-2.5g / cm 3 Alkali-activated concrete and ordinary concrete of required density can be configured according to project needs.

[0061] Example 3

[0062] like Figure 2-4 As shown, the application also includes reasonably configuring the use position of alkali-activated concrete in the module body and using a constrained damping mechanism to enable the module body 1 to achieve better seismic performance.

[0063] like Figure 2-4 As shown, a counterweight beam 2 with a rectangular frame structure is coaxially arranged at the lower end of the bottom plate of the module body 1, and a plurality of damping mechanisms are arranged crosswise and vertically on the inner side of the counterweight beam 2. The damping mechanism is a damping rod 3, and a plurality of pull-out plates 7 are welded to the outer wall of the damping rod 3. The low center of gravity structure of the module body 1 is strengthened by the arrangement of the counterweight beam 2, and the module bodies 1 stacked up and down have shock-absorbing performance by arranging the damping rod 3. A limiting groove 4 cooperating with the counterweight beam is arranged at the top of the module body 1, and the size of the limiting groove 4 matches the counterweight beam 2. A through casting hole (not shown in the figure) is arranged on the bottom plate, and ordinary concrete is cast into the limiting groove where the inner side of the counterweight beam is located through the casting hole to make the adjacent bottom plate and top plate become an integral structure. At this time, the damping rod is constrained on the inner side of the counterweight beam, and is firmly connected to the ordinary concrete through the pull-out plate and the damping rod itself. When an earthquake occurs, tension is generated between the ordinary concrete and the damping rod, and the shock-absorbing and anti-seismic effect is achieved through the damping effect of the damping rod.

[0064] like Figure 4 As shown, the damping rod 3 is made of shape memory alloy or low carbon steel material.

[0065] Example 4

[0066] like Figure 5-10 As shown, providing a connection structure between module bodies 1 using alkali-activated concrete means: filling alkali-activated concrete between the side walls of the left and right adjacent module bodies 1 so that the alkali-activated concrete covers the connection structure and connects the side walls of the adjacent module bodies 1 into an integral structure.

[0067] like Figure 5-10As shown, the connection structure includes: a PPVC space module 1 8 and a PPVC space module 2 9. A connection structure body is provided between the opposite side walls of the PPVC space module 1 8 and the PPVC space module 2 9. The connection structure body includes a plurality of grooves 15 respectively opened in the transverse direction on the side wall surface of the PPVC space module 1 8 and a plurality of grooves 2 16 opened in the transverse direction on the side wall surface of the PPVC space module 2 9. The grooves 15 and 16 are staggered with each other. The PPVC space module 2 opposite to the grooves 15 or 16 A plurality of U-shaped steel connectors 10 are pre-buried on the side walls of the PPVC space module 9 or the PPVC space module 8, respectively. The ends of the U-shaped steel connectors 10 at the same height are inserted into the relative groove 15 or the groove 2 16 and connected by a transverse connector. The upper and lower relative U-shaped steel connectors 10 are connected by a longitudinal shock-absorbing bracket 11. The U-shaped steel connectors 10 of the PPVC space module 1 and the PPVC space module 2 connected by the longitudinal shock-absorbing bracket 11 are alternately arranged, and the relative side walls of the PPVC space module 1 8 and the PPVC space module 2 9 are filled with alkali-activated concrete.

[0068] like Figure 5-10 As shown, the U-shaped steel connector 10 includes a U-shaped steel body with an opening facing upward, one end of the U-shaped steel body is embedded in the side wall of the PPVC space module 1 or the PPVC space module 2 to form an embedded section 1004, and the other end extends into the groove 1 or the groove 2 on the opposite side to form an insertion section 1005, and an intermediate section is formed between the embedded section 1004 and the insertion section 1005, a through hole 1001 is opened at the bottom of the intermediate section, a plurality of anti-pulling steel plates 1003 are fixedly connected to the upper surface of the bottom of the embedded section 1004, and first connecting holes 1002 are oppositely provided on the two side walls of the insertion section 1005.

[0069] like Figure 6 As shown, a plurality of embedded steel plates 13 are evenly distributed in the groove 15 and the groove 2 16, respectively. One end of the embedded steel plate 13 is embedded in the side wall of the PPVC space module 1 or the PPVC space module 2, and the other end is located in the groove 15 or the groove 2 16. The embedded steel plate 13 located in the groove 15 or the groove 2 16 is provided with a second connecting hole 14.

[0070] like Figure 5 , 7 As shown, the transverse connector includes a transverse steel bar 12 that passes through a first connecting hole 1002 and a second connecting hole 14 at the same groove 1 or the same groove 2, and the transverse steel bar 12 is used to fix the insertion section of the U-shaped steel connector at the same height to the side wall of the PPVC space module 1 or the PPVC space module 2 on the opposite side.

[0071] like Figure 5-10As shown, the longitudinal shock-absorbing bracket 11 includes a number of evenly distributed and vertically opposite annular steel bars 1102, the outer walls of the annular steel bars 1102 are welded and fixed by multiple longitudinally arranged longitudinal steel bars 1101, a central longitudinal steel bar 1103 is provided at the axis of the annular steel bar 1102, and a number of shock-absorbing rods 1104 evenly distributed around the central longitudinal steel bar are welded between the central longitudinal steel bar 1103 and the inner wall of the annular steel bar 1102.

[0072] like Figure 5-10 As shown, the longitudinal shock-absorbing bracket 11 passes through the through holes of a plurality of U-shaped steel connectors 10 that are opposite to each other vertically, and connects and fixes the middle sections of the U-shaped steel connectors 10 of the PPVC space module 1 and the PPVC space module 2 in the same longitudinal column.

[0073] like Figure 5-10 As shown, the shock absorbing rod 1104 is made of shape memory alloy or low carbon steel material.

[0074] like Figure 5-10 As shown, the length of the longitudinal shock-absorbing bracket is greater than the height of the PPVC space module 1 and the PPVC space module 2, which facilitates the overlapping of the connection structures of the upper and lower adjacent space modules.

[0075] In this embodiment, the longitudinal shock-absorbing bracket is a component for realizing longitudinal connection, which can not only realize the connection and fixation of the U-shaped steel connectors on both sides, but also play a shock-absorbing effect. When an earthquake occurs, the inner wall of the through hole squeezes the longitudinal shock-absorbing bracket, and the shock-absorbing rod is deformed by force, which plays a shock-absorbing and energy-consuming effect, and is conducive to the rapid recovery of the deformation of the wall structure, reducing or avoiding hard damage. Alkali-activated concrete is filled between the side walls of the left and right adjacent module bodies 1, so that the alkali-activated concrete covers the connection structure, and the side walls of the adjacent module bodies 1 are connected into an integral structure, which can not only play a vibration-absorbing and energy-consuming effect, but also strengthen the connection strength between the left and right adjacent module bodies. Among them, the relative side walls of the PPVC space module 1 and the PPVC space module 2 are not only connected and fixed by transverse connectors, but also connected and fixed by a number of longitudinal shock-absorbing brackets. The horizontal and vertical cross-connection method effectively improves the connection strength and seismic performance. After pouring alkali-activated concrete between the relative side walls of the PPVC space module 1 and the PPVC space module 2, a complete wall is formed. As the load-bearing structure of the PPVC building, the wall has the advantages of high strength and good seismic performance.

Claims

1. An application of alkali-activated concrete in PPVC modular buildings, characterized by: The PPVC module includes a module body with a hexahedral structure. The application is to improve the seismic performance of the module body by reasonably configuring the application position of alkali-activated concrete in the module body. Improving the seismic performance of the module body is achieved through three ways, one of which is to make the module body a low-center-of-gravity structure, the other is to make the module body have a damping shock-absorbing mechanism through the constraint of the alkali-activated concrete structure, and the shock absorption and the low-center-of-gravity structural characteristics of the module body are strengthened at the same time, and the last one is to make the module bodies have a connection structure using alkali-activated concrete.

2. The use of an alkali-activated concrete in PPVC modular buildings as claimed in claim 1, characterized in that: In the application, by reasonably configuring the application position of alkali-activated concrete in the module body, the module body becomes a low-center-of-gravity structure. The low-center-of-gravity structure has a lower center of gravity than the module body conventionally prepared with ordinary concrete of uniform mass. By lowering the center of gravity of the module body, the module body is made more stable during an earthquake.

3. The use of an alkali-activated concrete in PPVC modular buildings as claimed in claim 2, characterized in that: The low center of gravity structure means that the four side walls of the module body are non-uniform mass structures, and the density gradually decreases from bottom to top. The center of gravity of the module body is lower than the center of gravity of a conventional PPVC space module, and the four side walls of the conventional PPVC space module are uniform mass structures.

4. The use of an alkali-activated concrete in PPVC modular buildings as claimed in claim 3, characterized in that: The four side walls of the module body are provided with a number of sections from bottom to top, and the density of the sections decreases from bottom to top; the section at the bottom is cast by alkali-activated concrete and a steel cage, and the section at the top is cast by ordinary concrete and a steel cage, and the density of the alkali-activated concrete is greater than that of the ordinary concrete; the section between the bottom section and the top section is cast by mixed alkali-activated concrete and ordinary concrete combined with a steel cage, and the proportion of alkali-activated concrete used decreases from bottom to top.

5. The use of an alkali-activated concrete in PPVC modular buildings as claimed in claim 4, characterized in that: The steel cages of the four side walls are connected to each other into a whole. The weight of the left and right side walls of the module body is the same, and the weight of the front and rear end side walls is the same. The bottom plate of the module body is cast by alkali-activated concrete and steel cages, and the top plate of the module body is cast by ordinary concrete and steel cages. The thickness of the bottom plate is greater than that of the top plate. The center of gravity of the module body is located on the vertical line of the center of the bottom support surface of the module body.

6. The use of an alkali-activated concrete in PPVC modular buildings as claimed in claim 1, characterized in that: The application also includes achieving better seismic performance of the module body by reasonably configuring the use position of alkali-activated concrete in the module body and by using a constrained damping mechanism.

7. The use of an alkali-activated concrete in PPVC modular buildings as claimed in claim 6, characterized in that: A counterweight beam with a rectangular frame structure is coaxially arranged at the lower end of the bottom plate of the module body, and a plurality of damping mechanisms are arranged crosswise and vertically on the inner side of the counterweight beam. The damping mechanism is a damping rod, and a plurality of pull-out resistant plates are welded to the outer wall of the damping rod. The low center of gravity structure of the module body is strengthened by the arrangement of the counterweight beam, and the module bodies stacked up and down have shock-absorbing performance by arranging the damping rod. A limiting groove cooperating with the counterweight beam is arranged at the top of the module body, and the size of the limiting groove matches the counterweight beam. A through casting hole is arranged on the bottom plate, and ordinary concrete is cast into the limiting groove where the inner side of the counterweight beam is located through the casting hole to make the adjacent bottom plate and top plate become an integral structure; the damping rod is made of shape memory alloy or low carbon steel.

8. The use of an alkali-activated concrete in PPVC modular buildings as claimed in claim 1, characterized in that: Providing a connection structure using alkali-activated concrete between module bodies means: filling alkali-activated concrete between the side walls of the left and right adjacent module bodies, making the alkali-activated concrete cover the connection structure, and connecting the side walls of the adjacent module bodies into an integral structure.

9. The use of an alkali-activated concrete in PPVC modular buildings as claimed in claim 8, characterized in that: The connection structure comprises: a PPVC space module 1 and a PPVC space module 2, wherein a connection structure body is arranged between opposite side walls of the PPVC space module 1 and the PPVC space module 2, wherein the connection structure body comprises a plurality of grooves 1 respectively arranged in a transverse direction on the surface of one side wall of the PPVC space module, and a plurality of grooves 2 respectively arranged in a transverse direction on the surface of the second side wall of the PPVC space module, wherein the grooves 1 and 2 are staggered with each other, and a plurality of U-shaped steel connectors are respectively pre-buried on the PPVC space module 2 or the wall on one side of the PPVC space module opposite to the grooves 1 or 2, and the ends of the U-shaped steel connectors at the same height are inserted into the opposite grooves 1 or 2 and connected by transverse connectors, and the upper and lower opposite U-shaped steel connectors are connected by longitudinal shock-absorbing brackets, and the U-shaped steel connectors of the PPVC space module 1 and the PPVC space module 2 connected by the longitudinal shock-absorbing brackets are arranged alternately, and the opposite side walls of the PPVC space module 1 and the PPVC space module 2 are filled with alkali-activated concrete; The U-shaped steel connector comprises a U-shaped steel body with an opening facing upward, one end of the U-shaped steel body is embedded in the side wall of the PPVC space module 1 or the PPVC space module 2 to form an embedded section, and the other end extends into the groove 1 or the groove 2 on the opposite side to form an insertion section, and an intermediate section is formed between the embedded section and the insertion section, a through hole is opened at the bottom of the intermediate section, a plurality of anti-pulling plates are fixedly connected to the upper surface of the bottom of the embedded section, and first connection holes are oppositely provided on the two side walls of the insertion section; A plurality of embedded steel plates are evenly distributed in the groove 1 and the groove 2, respectively. One end of the embedded steel plate is embedded in the side wall of the PPVC space module 1 or the PPVC space module 2, and the other end is located in the groove 1 or the groove 2. The embedded steel plate located in the groove 1 or the groove 2 is provided with a second connection hole. The transverse connector includes a transverse steel bar that passes through the first connecting hole and the second connecting hole at the same groove 1 or the same groove 2, and the U-shaped steel connector insertion section at the same height is fixedly connected to the side wall of the PPVC space module 1 or the PPVC space module 2 on the opposite side through the transverse steel bar; The longitudinal shock-absorbing bracket comprises a plurality of evenly distributed and vertically opposite annular steel bars, the outer walls of the plurality of annular steel bars are welded and fixed by a plurality of longitudinally arranged longitudinal steel bars, a central longitudinal steel bar is arranged at the axis of the annular steel bar, and a plurality of shock-absorbing rods evenly distributed around the central longitudinal steel bar are welded between the central longitudinal steel bar and the inner wall of the annular steel bar; The longitudinal shock-absorbing bracket passes through the through holes of a plurality of U-shaped steel connectors that are opposite to each other vertically, and connects and fixes the middle sections of the U-shaped steel connectors of the PPVC space module 1 and the PPVC space module 2 in the same longitudinal column; The shock absorbing rod is made of shape memory alloy or low carbon steel; The length of the longitudinal shock-absorbing bracket is greater than the height of the PPVC space module 1 and the PPVC space module 2.

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