Lightweight concrete-based heat-preservation and sound-insulation floor structure and preparation method thereof

Abstract

The invention relates to the technical field of heat-preservation and sound-insulation floor structures and preparation, in particular to a heat-preservation and sound-insulation floor structure of a lightweight concrete base and a preparation method of the heat-preservation and sound-insulation floor structure. Lightweight concrete is pumped to the working face of the sound insulation cushion layer; a plurality of vibration intensities on the outer wall of the conveying pipe in the pumping process are obtained; determining a wear position according to the vibration intensity; the outlet speed of the aggregate block mass at the outlet is calculated based on the nearest pipeline distance between the abrasion position and the outlet of the conveying pipe; determining an estimated impact force of the aggregate block mass on the sound insulation cushion layer based on the outlet speed; and the pumping speed of the lightweight concrete is adjusted according to the estimated impact force, the pumping process of the lightweight concrete is completed according to the pumping speed and the water-cement ratio, and leveling, compacting, curing and surface layer laying are sequentially carried out, so that preparation of the heat preservation and sound insulation floor structure of the lightweight concrete base is completed. The preparation efficiency of the heat preservation and sound insulation floor structure is improved.

Description

A lightweight concrete-based thermal and sound-insulating floor structure and its preparation method Technical Field

[0001] This invention relates to the field of thermal insulation and soundproof floor structure and preparation technology, and particularly to a lightweight concrete-based thermal insulation and soundproof floor structure and preparation method. Background Technology

[0002] With the continuous improvement of building energy efficiency standards and people's increasing demands for living environment comfort, floor insulation and sound insulation structures are becoming increasingly important in modern buildings. Traditional floor structures are usually made by directly pouring ordinary concrete, which has a high thermal conductivity and lacks effective sound insulation design, resulting in high building energy consumption and serious noise interference between floors. To solve these problems, lightweight concrete has been widely used in thermal insulation and sound insulation floor structures in recent years due to its low thermal conductivity and good sound insulation performance. Lightweight concrete contains lightweight building materials such as cement and fly ash products. These lightweight aggregates contain a large number of closed pores of 50 to 200 micrometers, making their density significantly lower than that of ordinary aggregates. At the same time, it gives the material excellent thermal insulation performance and sound wave dissipation ability. In the existing technology, during the pumping process of lightweight concrete, the edge part of the lightweight aggregate experiences pseudo-blockage when flowing at high speed through bends, which increases the breakage rate of the lightweight aggregate. Therefore, there is an urgent need for a thermal insulation and sound insulation floor structure based on lightweight concrete and its preparation method.

[0003] Chinese Patent Publication No. CN103510648A discloses a silica nano-insulation felt floor panel bottom insulation structure and its construction process, which includes a structural layer, an adhesive layer, an insulation layer, a surface layer and a decorative layer arranged from top to bottom. The structural layer is a cast-in-place reinforced concrete floor panel; the adhesive layer is an adhesive mortar layer; the insulation layer is a silica nano-insulation felt; and the surface layer is gypsum board. This invention relates to a silica nano-insulation felt floor panel bottom insulation structure with a small thickness, which has no impact on the vertical usable space indoors; it has a highly efficient thermal insulation effect, completely blocking heat transfer between upper and lower spaces; and it provides sound insulation. However, the silica nano-insulation felt floor panel bottom insulation structure and its construction process have several drawbacks. During the on-site pouring and pumping of concrete, the lightweight aggregate in the lightweight concrete tends to agglomerate, causing friction and wear on the inner wall of the conveying pipe. This wear leads to an increase in the density of the concrete adhering to the inner wall of the conveying pipe, resulting in a greater impact force on the worn area. Furthermore, the change in concrete density reduces the water absorption performance of the sound insulation layer. Summary of the Invention

[0004] To address these issues, the present invention provides a lightweight concrete-based thermal insulation and soundproof floor structure and its preparation method, thereby overcoming the problems in the prior art where, during the on-site pouring and pumping of concrete, the lightweight aggregate in the lightweight concrete tends to agglomerate, causing friction and wear on the inner wall of the conveying pipe. This wear leads to an increase in the density of the concrete adhering to the inner wall of the conveying pipe, resulting in a greater impact force on the worn area, and a decrease in the water absorption performance of the soundproof pad due to changes in concrete density.

[0005] On one hand, the present invention provides a method for preparing a lightweight concrete-based thermal insulation and soundproof floor structure, comprising: laying a sound-insulating pad layer on the upper surface of a concrete floor slab, and setting vertical sound-insulating sheets between the sound-insulating pad layer and the wall above the concrete floor slab; mixing lightweight concrete mortar to obtain lightweight concrete, and pumping the lightweight concrete onto the working surface of the sound-insulating pad layer; obtaining several vibration intensities on the outer wall of the conveying pipe during the pumping process; determining the wear position of the inner wall of the conveying pipe based on the vibration intensities; and determining the wear position and the wear position based on the conveying pipe. The outlet velocity of the aggregate agglomerates in the lightweight concrete is calculated based on the nearest pipe distance to the outlet; the estimated impact force of the aggregate agglomerates on the sound insulation layer is determined based on the outlet velocity; the pumping speed of the lightweight concrete is adjusted according to the estimated impact force, wherein the water-cement ratio of the lightweight concrete is determined based on the estimated impact force; the pumping process of the lightweight concrete is completed according to the pumping speed and the water-cement ratio, and leveling, compaction, curing and surface layer laying are performed in sequence to complete the preparation of the thermal insulation and sound insulation floor structure based on lightweight concrete.

[0006] Furthermore, the wear location is the location of a vibration intensity sampling point on the outer wall of the conveying pipe where the vibration intensity is greater than a preset intensity.

[0007] Further, the step of calculating the outlet velocity of aggregate clumps in lightweight concrete at the outlet based on the nearest pipe distance between the wear location and the outlet of the conveying pipe includes: obtaining the nearest pipe distance between the wear location and the outlet of the conveying pipe; calculating the pressure loss of the aggregate clumps moving from the wear location to the outlet based on the pipe distance and the pipe friction attenuation coefficient; determining the outlet residual pressure based on the current pumping pressure of the pumping process and the pressure loss; and determining the outlet velocity by multiplying the square root of the outlet residual pressure corresponding to the pressure loss and the velocity-pressure conversion coefficient.

[0008] Furthermore, the outlet residual pressure is the difference between the current pumping pressure and the pressure loss.

[0009] Furthermore, the estimated impact force is the product of the exit velocity and the velocity-impact force conversion coefficient.

[0010] Furthermore, the impact force is the product of the initial velocity and the velocity fitting conversion coefficient.

[0011] Further, adjusting the pumping speed of the lightweight concrete according to the estimated impact force includes: comparing the estimated impact force with a preset impact force; if the estimated impact force is greater than the preset impact force, it is determined that the impact force of the pumping on the sound insulation layer does not meet the requirements due to aggregate agglomerates, and the pumping speed of the lightweight concrete is reduced, wherein the pumping speed is negatively correlated with the estimated impact force.

[0012] Furthermore, the water-cement ratio is negatively correlated with the estimated impact force.

[0013] On the other hand, the present invention provides a lightweight concrete-based thermal insulation and soundproof floor structure, the lightweight concrete-based thermal insulation and soundproof floor structure comprising: a concrete floor slab for providing vertical upward support; a sound insulation pad layer laid and covering the upper surface of the concrete floor slab for blocking solid sound transmission paths and providing elastic support; vertical sound insulation strips partially connected to the sound insulation pad layer for isolating the rigid connection between the lightweight concrete layer and the wall located on the side of the concrete floor slab; a lightweight concrete layer laid between the sound insulation pad layer and the vertical sound insulation strips for achieving thermal insulation and sound insulation; and a surface layer laid on top of the lightweight concrete layer for working together with the lightweight concrete layer to form a sound insulation system.

[0014] Furthermore, the lightweight concrete layer comprises cement, fly ash, shale ceramsite as lightweight aggregate, sand, water, polycarboxylate superplasticizer, and sodium fatty acid air-entraining agent in a mass ratio of 1:0.3:4.0:2.0:0.5:0.02:0.004.

[0015] Compared with the prior art, the beneficial effect of the present invention is that, by acquiring several vibration intensities on the outer wall of the conveying pipe during the pumping process, the location of the vibration intensity sampling point on the outer wall of the conveying pipe that is greater than the preset intensity is determined as the wear location. The vibration intensity obtained on the outer wall of the lightweight concrete conveying pipe during the pumping process characterizes the intensity of the energy of the collision between the lightweight concrete flowing inside the conveying pipe and the inner wall of the conveying pipe. When the lightweight concrete flows at high speed in the pipe, the aggregate and potential aggregate clumps in it will continuously impact the pipe wall. The kinetic energy generated by this impact is transmitted through the pipe wall. Vibration intensity is measured on the outer wall of the conveying pipe using a vibration sensor. When the vibration intensity measured by the sensor exceeds a preset intensity, it indicates that the aggregate agglomeration in the lightweight concrete increases the impact force of the aggregate clumps on the inner wall of the pipe. This increased impact force leads to increased vibration intensity on the outer wall of the pipe. Furthermore, the irregular shape and sharp edges of the aggregate particles cause stress concentration at the contact points when they impact the inner wall of the conveying pipe. This stress concentration effect results in a normal impact force from the aggregate clumps striking the inner wall of the conveying pipe, which in turn damages the protective layer of the inner wall. The continuous normal impact and scraping accelerate the wear of the inner wall of the conveying pipe, leading to increased surface roughness. The resulting rough surface easily traps some cement mortar. During pumping intervals or non-use periods, this residual lightweight concrete trapped in the worn areas evaporates moisture and hardens. During the next pumping operation, the dried lightweight concrete debris reabsorbs moisture, but its internal structure cannot return to its initial loose state, forming dense aggregate clumps. These dense aggregate clumps detach and mix into the lightweight concrete. In the lightweight concrete flow, high-density aggregate clumps are formed. By determining the wear location on the inner wall of the conveying pipe caused by the impact of the aggregate clumps, since the aggregate clumps are attached, hardened and detached at the wear location due to the increased roughness of the pipe wall, the wear location is regarded as the starting point for the aggregate clumps to enter the mainstream lightweight concrete flow and begin to move with the flow. Thus, the vibration intensity is linked to the cause and location of the aggregate clumps, which improves the consistency of concrete quality during the pumping of lightweight concrete and the accuracy of the assessment of potential impact risks to the sound insulation layer, thereby improving the preparation efficiency of the thermal insulation and soundproof floor structure.

[0016] Furthermore, this invention obtains the nearest pipe distance between the wear location and the outlet of the delivery pipe. This nearest pipe distance represents the length of the fluid transport path traversed by the aggregate agglomerate as it moves from the wear location to the outlet of the delivery pipe. Based on this nearest pipe distance and the pipe friction attenuation coefficient, the pressure loss of the aggregate agglomerate as it moves from the wear location to the outlet of the delivery pipe is calculated. The pipe friction attenuation coefficient is the pressure loss per unit length of pipe caused by fluid viscous resistance and pipe wall friction. The remaining outlet pressure is determined based on the current pumping pressure and the pressure loss during the pumping process. The remaining outlet pressure is the difference between the current pumping pressure and the pressure loss. The residual pressure characterizes the effective work pressure exerted by the pumping device connected to the delivery pipe on the aggregate clumps, after deducting frictional losses, and discharging the aggregate clumps from the outlet. This effective work pressure determines the initial kinetic energy of the aggregate clumps when they leave the outlet. Therefore, the product of the square root of the outlet residual pressure corresponding to the pressure loss and the velocity-pressure conversion coefficient is determined as the outlet velocity of the aggregate clumps reaching the delivery pipe. The product of the outlet velocity and the velocity-impact force conversion coefficient is determined as the estimated impact force of the aggregate clumps on the sound insulation pad. The velocity-impact force conversion coefficient is a preset empirical coefficient used to linearly map the movement velocity of the aggregate clumps to the impact on the sound insulation pad. Force; the velocity-pressure conversion coefficient is the outlet velocity corresponding to the square root of the unit outlet residual pressure. Since normal cement mortar is a surface load, the viscosity of the fluid is used to buffer the impact energy; aggregate lumps are point loads, lacking plastic deformation capacity. The uniformly distributed pressure of aggregate lumps differs from that of normal homogeneous lightweight concrete. Therefore, aggregate lumps buffered by fluidity lack plastic deformation capacity. Due to the difference in mechanical effects between rigid aggregate lumps and normal fluid cement mortar when impacting the sound insulation layer, the estimated impact force generated by aggregate lumps cannot be effectively absorbed. Furthermore, because the properties of aggregate lumps differ from those of normal cement mortar after curing, lightweight concrete containing aggregate lumps... The internal porosity of lightweight concrete is lower than that of normal cement mortar, resulting in higher density and elastic modulus, i.e., greater stiffness, for lightweight concrete containing aggregate lumps. Furthermore, the outer surface of the aggregate lumps is prone to forming a weak interface with cold joints between it and freshly poured concrete, which can block the sound insulation path and easily cause elastic failure of the sound insulation layer, thus reducing its sound insulation effect. By linking the estimated impact force obtained with the outlet velocity of the aggregate lumps at the delivery pipe, the monitoring of material homogeneity during the pumping of lightweight concrete and the accuracy of the impact damage risk assessment of the sound insulation layer are improved, thereby increasing the preparation efficiency of the thermal insulation and soundproof floor structure.

[0017] Furthermore, this invention compares the estimated impact force with the preset impact force. The estimated impact force characterizes the risk of physical damage to the underlying sound insulation layer caused by the aggregate agglomerate at the moment it leaves the delivery pipe. When the estimated impact force is greater than the preset impact force, it means that the kinetic energy carried by the aggregate agglomerate is too high, exceeding the absorption threshold of the elastic deformation of the sound insulation layer. Since the sound insulation layer is usually a porous elastic material, such as rubber or polyurethane foam, excessive point load will cause the internal pore structure of the sound insulation layer to collapse, resulting in plastic deformation. This will destroy the elastic support of the sound insulation layer, leading to a solid-borne sound transmission path. The lack of obstruction ultimately resulted in the floor structure's sound insulation failing to meet design requirements. Therefore, by reducing the pumping speed of the lightweight concrete, and based on the kinetic energy formula (the impact energy of aggregate lumps is proportional to the square of the velocity), reducing the pumping speed directly reduces the movement speed of the aggregate lumps within the delivery pipe, thereby reducing the outlet velocity. This reduction in outlet velocity quadratically decreases the kinetic energy of the aggregate lumps. Reduced kinetic energy means a decrease in the instantaneous impact force when the aggregate lumps strike the sound insulation layer, i.e., the impact energy. This keeps the impact force within the elastic bearing capacity of the sound insulation layer, preventing damage to the sound insulation layer. The physical damage was prevented, ensuring the integrity of the sound insulation system of the sound insulation pad. Furthermore, the water-cement ratio of the lightweight concrete was determined based on the estimated impact force. Specifically, the water-cement ratio was reduced by adding polycarboxylate superplasticizer at the inlet of the pumping device while simultaneously utilizing the continuous rotation of the pump truck's mixing hopper to ensure uniform mixing of the freshly mixed concrete before it entered the delivery pipe. This reduced the water-cement ratio, increased the yield stress and plastic viscosity of the cement paste, and resulted in a higher drag force on the aggregate from the high-viscosity paste, effectively suspending it. The aggregate inhibits the settling and agglomeration of aggregates, reducing the formation of subsequent aggregate lumps from the source. Furthermore, the reduced water-cement ratio decreases the porosity and increases the strength of the hardened concrete matrix. Even if a small number of aggregate lumps remain, the concrete matrix can better coordinate with the aggregate lumps in deformation, diffusing the point load generated by the aggregate lumps into a surface load. This reduces the stress concentration transmitted from the lightweight concrete to the sound insulation layer, thereby reducing the probability of generating new high-density aggregate lumps during subsequent pumping and improving the overall stiffness matching of the floor structure. Ultimately, this improves the preparation efficiency of the thermal insulation and soundproof floor structure.

[0018] Furthermore, this invention forms a floating floor structure by setting a sound-insulating pad between the concrete floor slab and the lightweight concrete layer. The sound-insulating pad physically and elastically decouples the upper floor structure from the lower load-bearing concrete floor slab, effectively cutting off the path of impact sounds, such as footsteps and falling objects, propagating downwards through the rigid concrete structure. By setting vertical sound-insulating sheets and partially connecting them to the sound-insulating pad, the rigid contact between the lightweight concrete layer and the side walls is isolated. This prevents sound energy from being transmitted laterally through the connection between the floor slab edge and the wall, thus reducing the impact of the sound bridge effect on the side walls and ensuring the integrity of the sound insulation system. Due to its lower density, the lightweight concrete layer reduces the constant load on the floor structure, and the porous structure inside the lightweight concrete provides additional thermal resistance, reducing building energy consumption. The surface layer and the lightweight concrete layer together constitute a composite sound insulation system. The surface layer, through its mass, forms a mass spring system with the underlying lightweight concrete layer, further enhancing the isolation capability for mid-to-high frequency airborne sound.

[0019] Furthermore, this invention achieves low concrete density and provides thermal insulation and soundproofing properties by using a shale ceramsite (lightweight aggregate) to cement mass ratio of 4.0:1. The high proportion of shale ceramsite ensures this. The addition of polycarboxylate superplasticizer (mass ratio 0.02) improves the fluidity and dispersibility of the cement paste at a water-cement ratio of 0.5 (water to cement ratio 0.5:1), enhancing the pumpability of the lightweight concrete during pumping. Simultaneously, the polycarboxylate superplasticizer allows the highly cohesive paste to effectively encapsulate the lightweight aggregate, preventing the shale ceramsite from floating or segregating during transportation and pouring, thus ensuring the homogeneity of the lightweight concrete layer. The introduction of sodium fatty acid air-entraining agent (mass ratio 0.004) introduces air bubbles into the concrete. These air bubbles further reduce the thermal conductivity of concrete, improving its insulation effect. Furthermore, as an elastic medium, they absorb sound wave energy, enhancing the material's sound absorption performance. Fly ash, with a mass ratio of 0.3, acts as an active admixture. The microsphere effect of fly ash improves the workability of the mixture, reducing water requirements. In the later stages of hardening, the pozzolanic reaction of fly ash consumes calcium hydroxide, generating additional hydrated calcium silicate gel that fills the microcracks in the interface transition zone, improving the volume stability of the lightweight concrete layer and reducing shrinkage cracks. This prevents sound bridge leakage caused by cracks. The composition of the lightweight concrete, including its mass ratio, is optimized through matching, improving the thermal insulation, sound insulation, and mechanical properties of the insulated and soundproof floor structure. Attached Figure Description

[0020] Figure 1 is an overall flowchart of the preparation method of the lightweight concrete-based thermal insulation and soundproof floor structure according to an embodiment of the present invention; Figure 2 is a flowchart of determining the wear position of the inner wall of the conveying pipe in the preparation method of the lightweight concrete-based thermal insulation and soundproof floor structure according to an embodiment of the present invention; Figure 3 is a flowchart of calculating the outlet velocity of the aggregate clumps in the lightweight concrete at the outlet in the preparation method of the lightweight concrete-based thermal insulation and soundproof floor structure according to an embodiment of the present invention; Figure 4 is a flowchart of adjusting the pumping speed of the lightweight concrete in the preparation method of the lightweight concrete-based thermal insulation and soundproof floor structure according to an embodiment of the present invention. Detailed Implementation

[0021] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0024] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] Please refer to Figure 1, which is an overall flowchart of the preparation method of the lightweight concrete-based thermal insulation and soundproof floor structure according to an embodiment of the present invention. The preparation method of the lightweight concrete-based thermal insulation and soundproof floor structure according to an embodiment of the present invention includes: Step S1, laying a sound insulation pad on the upper surface of a concrete floor slab, and setting vertical sound insulation sheets between the sound insulation pad and the wall above the concrete floor slab; Step S2, stirring lightweight concrete mortar to obtain lightweight concrete, and pumping the lightweight concrete onto the working surface of the sound insulation pad; Step S3, obtaining several vibration intensities on the outer wall of the conveying pipe during the pumping process; Step S4, determining the inner wall of the conveying pipe based on the vibration intensities. Wear location; Step S5, calculate the outlet velocity of the aggregate agglomerates in the lightweight concrete at the outlet based on the wear location and the nearest pipe distance to the outlet of the conveying pipe; Step S6, determine the estimated impact force of the aggregate agglomerates on the sound insulation layer based on the outlet velocity; Step S7, adjust the pumping speed of the lightweight concrete according to the estimated impact force, wherein the water-cement ratio of the lightweight concrete is determined based on the estimated impact force; Step S8, complete the pumping process of the lightweight concrete according to the pumping speed and the water-cement ratio, and sequentially perform leveling, compaction, curing and surface layer laying to complete the preparation of the thermal insulation and sound insulation floor structure based on lightweight concrete.

[0026] Specifically, laying a sound insulation layer on a concrete floor slab involves cleaning the concrete floor slab of dust and oil, repairing cracks, leveling with self-flowing mortar, and then laying a sound insulation layer that matches the size of the concrete floor slab onto the concrete floor slab.

[0027] Those skilled in the art will understand that the process of cleaning dust and oil stains, repairing cracks, and leveling with self-flowing mortar on concrete floor slabs is a conventional technique known to them. Therefore, the process of cleaning dust and oil stains, repairing cracks, and leveling with self-flowing mortar on concrete floor slabs will not be described in detail here.

[0028] Specifically, the leveling process involves using a 3m long aluminum alloy scraper at a 30° angle to the working surface of the sound insulation pad, advancing at a constant speed of 0.5m / s to remove excess concrete and fill in low-lying areas.

[0029] Specifically, the compaction process involves using a 50mm diameter rubber roller to compact the leveled lightweight concrete.

[0030] Specifically, the curing process involves covering the lightweight concrete layer with a 0.1mm thick PE plastic film within one hour after the leveling and compaction process is completed, maintaining the surface temperature of the thick PE plastic film between 15℃ and 20℃, and allowing it to stand for 24 hours. From 24 hours to 72 hours, water is sprayed every 4 hours to maintain an ambient humidity greater than 85%RH, and from 72 hours to 168 hours, the ambient humidity is maintained at or above 60%RH, with the ambient temperature controlled between 10℃ and 30℃.

[0031] Specifically, the steps for laying the surface layer include: mixing cement, quartz sand, water, polycarboxylate superplasticizer, VAE emulsion, and defoamer in a concrete mixer in a mass ratio of 1.0:2.5:0.35:0.015:0.08:0.003 to obtain surface layer concrete; spreading the surface layer concrete using a toothed scraper at a leveling speed of 0.3 m / s; and curing the spread surface layer concrete by sprinkling water to keep the surface moist for at least 3 days.

[0032] As will be understood by those skilled in the art, the processes of leveling, compaction, curing, and laying of the surface layer are conventional technical methods well known to them, and therefore the processes of leveling, compaction, curing, and laying of the surface layer will not be described in detail here.

[0033] Specifically, the vertical sound insulation sheet uses closed-cell polyethylene foam, and a preferred embodiment of the vertical sound insulation sheet is cross-linked polyethylene foam.

[0034] Specifically, the adhesive in the glue gun used to fix the vertical sound insulation sheet is a single-component polyurethane structural adhesive. In a preferred embodiment, the adhesive in the glue gun is a neutral curing polyurethane adhesive.

[0035] Specifically, the glue gun is a manual high-pressure glue gun.

[0036] Those skilled in the art will understand that the process of fixing vertical sound insulation strips with a glue gun is a conventional technique known to them, and therefore the process of fixing vertical sound insulation strips with a glue gun will not be described in detail here.

[0037] Specifically, the mixing process of lightweight concrete mortar is completed in the mixing hopper of the pumping device connected to the delivery pipe.

[0038] It will be understood by those skilled in the art that the process of mixing lightweight concrete mortar is a conventional technique known to them, and therefore the process of mixing lightweight concrete mortar will not be described in detail here.

[0039] Specifically, the pumping device used to pump lightweight concrete onto the sound insulation layer is a boom-type concrete pump truck.

[0040] Specifically, the working surface of the sound insulation pad is the upper surface of the sound insulation pad after it has been laid, which serves as the construction interface for receiving lightweight concrete.

[0041] Those skilled in the art will understand that the acceptance criteria for the working surface of the sound insulation pad are the conventional acceptance criteria well known to those skilled in the art, therefore the acceptance criteria for the working surface of the sound insulation pad will not be elaborated here.

[0042] Specifically, the conveying pipe is made of high-chromium alloy steel with a ceramic coating, the inner diameter of the conveying pipe is 125mm with a tolerance of ±1mm, and the total length of the conveying pipe is less than or equal to 120m.

[0043] Please refer to Figure 2, which is a flowchart of the method for determining the wear position of the inner wall of the conveying pipe in the preparation method of the thermal insulation and soundproof floor structure based on lightweight concrete according to an embodiment of the present invention. The step of determining the wear position of the inner wall of the conveying pipe based on the vibration intensity includes: comparing the vibration intensity with a preset intensity; if the vibration intensity is greater than the preset intensity, it is determined that the degree of wear of the aggregate clumps in the lightweight concrete on the inner wall of the conveying pipe does not meet the requirements, and the wear position is determined.

[0044] Specifically, the vibration intensity on the outer wall of the conveying pipe is obtained by an array of vibration sensors that are set at equal intervals on the outer wall of the conveying pipe.

[0045] Optionally, based on the pumping device, i.e., the boom-type concrete pump truck, the maximum pumping pressure is 13MPa, and the preset flow range is [missing information]. to Background vibration during concrete pumping is usually in to The preset intensity selectable range is: .

[0046] Preferably, the preferred embodiment with the preset strength is as follows: .

[0047] Specifically, the wear location is the location of a vibration intensity sampling point on the outer wall of the conveying pipe where the vibration intensity is greater than a preset intensity.

[0048] In practice, this invention acquires several vibration intensities on the outer wall of the conveying pipe during the pumping process. The locations of vibration intensity sampling points on the outer wall of the conveying pipe where the vibration intensity exceeds a preset intensity are defined as wear locations. The vibration intensity acquired on the outer wall of the lightweight concrete conveying pipe during pumping characterizes the intensity of the energy generated by the collision between the lightweight concrete flowing inside the pipe and the inner wall of the pipe. When the lightweight concrete flows at high speed within the pipe, the aggregates and potential aggregate clumps within it continuously impact the pipe wall. The kinetic energy generated by this impact is transmitted through the pipe wall to the outer wall of the conveying pipe via vibration. The vibration intensity detected by the vibration sensor exceeds a preset intensity, indicating that aggregate agglomeration in the lightweight concrete increases the impact force of the aggregate clumps on the inner wall of the pipe. This increased impact force leads to increased vibration intensity on the outer wall of the pipe. Furthermore, the irregular shape and sharp edges of the aggregate particles cause stress concentration at the contact points when they impact the inner wall of the conveying pipe. This stress concentration effect causes the aggregate clumps to generate a normal impact force when impacting the inner wall of the conveying pipe, resulting in scraping of the protective layer of the inner wall. Continuous normal impact and scraping accelerate the wear of the inner wall of the delivery pipe, leading to increased surface roughness. The resulting rough surface easily traps cement mortar. During pumping intervals or non-use periods, this residual lightweight concrete trapped at the wear points evaporates and hardens. During the next pumping operation, the dried lightweight concrete debris reabsorbs moisture, but its internal structure cannot return to its initial loose state, forming dense aggregate clumps. These dense aggregate clumps then detach and mix with the lightweight concrete. In the soil flow, high-density aggregate clumps are formed. By determining the wear location on the inner wall of the conveying pipe caused by the impact of the aggregate clumps, since the aggregate clumps are attached, hardened and detached at the wear location due to the increased roughness of the pipe wall, the wear location is regarded as the starting point for the aggregate clumps to enter the mainstream lightweight concrete flow and begin to move with the flow. Thus, the vibration intensity is linked to the cause and location of the aggregate clumps, which improves the consistency of concrete quality during the pumping of lightweight concrete and the accuracy of the assessment of potential impact risks to the sound insulation layer, thereby improving the preparation efficiency of the thermal insulation and soundproof floor structure.

[0049] Please refer to Figure 3, which is a flowchart illustrating the calculation of the outlet velocity of aggregate clumps in lightweight concrete at the outlet in the preparation method of a lightweight concrete-based thermal insulation and soundproof floor structure according to an embodiment of the present invention. The calculation of the outlet velocity of aggregate clumps in lightweight concrete at the outlet based on the nearest pipe distance between the wear location and the outlet of the conveying pipe includes: obtaining the nearest pipe distance between the wear location and the outlet of the conveying pipe; calculating the pressure loss of the aggregate clumps moving from the wear location to the outlet based on the pipe distance and the pipe friction attenuation coefficient; determining the outlet residual pressure based on the current pumping pressure of the pumping process and the pressure loss; and determining the outlet velocity by multiplying the square root of the outlet residual pressure corresponding to the pressure loss by the velocity-pressure conversion coefficient.

[0050] Specifically, the pipe distance is the shortest curved distance along the inner wall of the conveying pipe between the wear location and the outlet of the conveying pipe.

[0051] Specifically, the pipeline friction attenuation coefficient is the pressure loss per unit length of pipeline caused by fluid viscous resistance and pipe wall friction, and the unit of the pipeline friction attenuation coefficient is MPa / m.

[0052] Optionally, based on the fact that the conveying pipe is made of high-chromium alloy steel with a ceramic coating, the inner diameter of the conveying pipe is 125mm, and the optional range of the pipe friction attenuation coefficient is [0.01MPa / m, 0.05MPa / m].

[0053] Preferably, the preferred embodiment of the pipeline friction attenuation coefficient is 0.02 MPa / m.

[0054] Specifically, the velocity-pressure conversion factor is the outlet velocity corresponding to the square root of the unit outlet residual pressure, and the unit of the velocity-pressure conversion factor is (m / s) / MPa.

[0055] Optionally, the velocity-pressure conversion factor can be selected in the range of [0.5 (m / s) / MPa, 1.2 (m / s) / MPa].

[0056] Preferably, the preferred embodiment of the velocity-pressure conversion factor is 0.8 (m / s) / MPa.

[0057] Specifically, the outlet residual pressure is the difference between the current pumping pressure and the pressure loss.

[0058] In a specific embodiment, the nearest pipe distance between the current wear location and the outlet of the conveying pipe is 15m, the pipe friction attenuation coefficient is 0.02MPa / m, the calculated pressure loss of the aggregate agglomerate moving from the wear location to the outlet is 0.02MPa / m × 15m = 0.3MPa, the current pumping pressure during the pumping process is 11MPa, the remaining outlet pressure is 11MPa - 0.3MPa = 10.7MPa, and the calculated outlet velocity is... .

[0059] Those skilled in the art will understand that the pipeline friction attenuation coefficient and the velocity-pressure conversion coefficient are empirical parameters determined in the laboratory based on Bernoulli's equation. The selectable range and preferred embodiments of the pipeline friction attenuation coefficient and the velocity-pressure conversion coefficient are strongly related to the specific fluid density of lightweight concrete and the characteristics of the conveying pipe, such as the material of the inner wall of the conveying pipe, the diameter and length of the conveying pipe. Therefore, the selectable range and preferred embodiments of the pipeline friction attenuation coefficient and the velocity-pressure conversion coefficient only need to satisfy the establishment of physical relationships between pipeline distance and pressure loss and between outlet residual pressure and outlet velocity in the scenario of lightweight concrete pumping. Those skilled in the art can make adaptive adjustments to the selectable range and preferred embodiments of the pipeline friction attenuation coefficient and the velocity-pressure conversion coefficient according to actual application or production needs.

[0060] In a specific embodiment, under the conditions that the lightweight concrete mix proportion is cement, fly ash, shale ceramsite as lightweight aggregate, sand, water, polycarboxylate superplasticizer, and sodium fatty acid air-entraining agent in a mass ratio of 1:0.3:4.0:2.0:0.5:0.02:0.004, the inner wall of the conveying pipe is made of wear-resistant alloy steel, the diameter of the conveying pipe is 125mm, and the length is 100m, the preferred embodiment of the pipeline friction attenuation coefficient calibrated in the laboratory is 0.02MPa / m, and the preferred embodiment of the velocity-pressure conversion coefficient is 0.8 (m / s) / MPa.

[0061] In implementation, this invention obtains the nearest pipe distance between the wear location and the outlet of the delivery pipe. This nearest pipe distance represents the length of the fluid transport path traversed by the aggregate agglomerate as it moves from the wear location to the outlet of the delivery pipe. Based on this nearest pipe distance and the pipe friction attenuation coefficient, the pressure loss of the aggregate agglomerate moving from the wear location to the outlet of the delivery pipe is calculated. The pipe friction attenuation coefficient is the pressure loss per unit length of pipe caused by fluid viscous resistance and pipe wall friction. The remaining outlet pressure is determined by the current pumping pressure and the pressure loss during the pumping process. The remaining outlet pressure is the difference between the current pumping pressure and the pressure loss. The residual pressure characterizes the effective work pressure exerted by the pumping device connected to the delivery pipe on the aggregate clumps, after deducting frictional losses, and discharging the aggregate clumps from the outlet. This effective work pressure determines the initial kinetic energy of the aggregate clumps when they leave the outlet. Therefore, the product of the square root of the outlet residual pressure corresponding to the pressure loss and the velocity-pressure conversion coefficient is determined as the outlet velocity of the aggregate clumps reaching the delivery pipe. The product of the outlet velocity and the velocity-impact force conversion coefficient is determined as the estimated impact force of the aggregate clumps on the sound insulation pad. The velocity-impact force conversion coefficient is a preset empirical coefficient used to linearly map the movement velocity of the aggregate clumps to the impact on the sound insulation pad. Force; the velocity-pressure conversion coefficient is the outlet velocity corresponding to the square root of the unit outlet residual pressure. Since normal cement mortar is a surface load, the viscosity of the fluid is used to buffer the impact energy; aggregate lumps are point loads, lacking plastic deformation capacity. The uniformly distributed pressure of aggregate lumps differs from that of normal homogeneous lightweight concrete. Therefore, aggregate lumps buffered by fluidity lack plastic deformation capacity. Due to the difference in mechanical effects between rigid aggregate lumps and normal fluid cement mortar when impacting the sound insulation layer, the estimated impact force generated by aggregate lumps cannot be effectively absorbed. Furthermore, because the properties of aggregate lumps differ from those of normal cement mortar after curing, lightweight concrete containing aggregate lumps... The internal porosity of lightweight concrete is lower than that of normal cement mortar, resulting in higher density and elastic modulus, i.e., greater stiffness, for lightweight concrete containing aggregate lumps. Furthermore, the outer surface of the aggregate lumps is prone to forming a weak interface with cold joints between it and freshly poured concrete, which can block the sound insulation path and easily cause elastic failure of the sound insulation layer, thus reducing its sound insulation effect. By linking the estimated impact force obtained with the outlet velocity of the aggregate lumps at the delivery pipe, the monitoring of material homogeneity during the pumping of lightweight concrete and the accuracy of the impact damage risk assessment of the sound insulation layer are improved, thereby increasing the preparation efficiency of the thermal insulation and soundproof floor structure.

[0062] Specifically, the distance between the wear location and the nearest pipe outlet of the conveying pipe is determined by obtaining the location of vibration intensity sampling points with vibration intensity greater than the preset intensity on the conveying pipe.

[0063] Specifically, the estimated impact force is the product of the exit velocity and the velocity-impact force conversion coefficient.

[0064] Specifically, the velocity-impact force conversion coefficient is a preset empirical coefficient used to linearly map the movement velocity of aggregate clumps into the impact force on the sound insulation layer. The unit of the velocity-impact force conversion coefficient is N / (m / s).

[0065] Optionally, with the aggregate mass being 0.1 kg and the sound insulation pad being made of cross-linked polyethylene foam, the selectable range for the velocity-impact force conversion coefficient is [50 N / (m / s), 150 N / (m / s)].

[0066] Preferably, the velocity-impact force conversion coefficient is 100 N / (m / s).

[0067] In a specific example, the current exit velocity is 2.62 m / s, the velocity-impact force conversion factor is 100 N / (m / s), and the calculated estimated impact force is 262 N.

[0068] Those skilled in the art will understand that the velocity-impact force conversion coefficient is an empirical parameter determined in the laboratory. The selectable range and preferred embodiment of the velocity-impact force conversion coefficient are strongly related to the quality characteristics of the aggregate clumps and the material of the sound insulation pad. Therefore, the selectable range and preferred embodiment of the velocity-impact force conversion coefficient only need to establish the physical relationship between the outlet velocity and the estimated impact force in the scenario of pouring a lightweight concrete impact sound insulation pad. Those skilled in the art can make adaptive adjustments to the selectable range and preferred embodiment of the velocity-impact force conversion coefficient according to actual application or production needs.

[0069] Please refer to Figure 4, which is a flowchart of the method for adjusting the pumping speed of lightweight concrete in the preparation method of the lightweight concrete-based thermal insulation and soundproof floor structure according to an embodiment of the present invention. The step of adjusting the pumping speed of the lightweight concrete according to the estimated impact force includes: comparing the estimated impact force with the preset impact force; if the estimated impact force is greater than the preset impact force, it is determined that the impact force of the pumping on the sound insulation pad does not meet the requirements due to aggregate agglomerates, and the pumping speed of the lightweight concrete is reduced, wherein the pumping speed is negatively correlated with the estimated impact force.

[0070] Specifically, the water-cement ratio is negatively correlated with the estimated impact force.

[0071] Optionally, based on the maximum pumping pressure of the boom-type concrete pump truck being 13MPa, the preset flow range is... to The preset impact force can be selected in the range of [200N, 300N].

[0072] Preferably, the preset impact force in the preferred embodiment is 255N.

[0073] In implementation, when the estimated impact force is within 5N greater than the preset impact force, the pumping speed of the lightweight concrete is adjusted to 98% of the current pumping speed. When the estimated impact force exceeds the preset impact force by more than 5N, the pumping speed of the lightweight concrete is reduced by 0.01m / s for every 1N exceeding the current pumping speed. In a specific embodiment, the estimated impact force is 262N, and the pumping speed of the lightweight concrete is 0.55m / s. The reduced pumping speed of the lightweight concrete is 0.55m / s × 0.98 - (2N / 1N) × 0.01m / s ≈ 0.52m / s. When the calculated pumping speed has more than two decimal places, it is rounded to two decimal places, i.e., 0.52m / s.

[0074] Specifically, the water-cement ratio is negatively correlated with the estimated impact force.

[0075] Specifically, the water-cement ratio of lightweight concrete is adjusted by adding polycarboxylate superplasticizer at the inlet of the pumping device.

[0076] In practice, when the estimated impact force is within 5N greater than the preset impact force, the water-cement ratio is adjusted to 98% of the current water-cement ratio. When the estimated impact force exceeds the preset impact force by more than 5N, the water-cement ratio is reduced by 0.01 for every 1N exceeding the current water-cement ratio. In a specific embodiment, the current estimated impact force is 262N and the water-cement ratio is 0.5. After the reduction, the water-cement ratio is 0.5×0.98-(2N / 1N)×0.01=0.47.

[0077] In implementation, this invention compares the estimated impact force with the preset impact force. The estimated impact force characterizes the risk of physical damage to the underlying sound insulation layer caused by the aggregate agglomerate at the moment it leaves the delivery pipe. When the estimated impact force is greater than the preset impact force, it means that the kinetic energy carried by the aggregate agglomerate is too high, exceeding the absorption threshold of the elastic deformation of the sound insulation layer. Since the sound insulation layer is usually a porous elastic material, such as rubber or polyurethane foam, excessive point load will cause the internal pore structure of the sound insulation layer to collapse, resulting in plastic deformation. This damages the elastic support of the sound insulation layer, leading to solid-borne sound transmission paths. The lack of obstruction ultimately resulted in the floor structure's sound insulation failing to meet design requirements. Therefore, by reducing the pumping speed of the lightweight concrete, and based on the kinetic energy formula (the impact energy of aggregate lumps is proportional to the square of the velocity), reducing the pumping speed directly reduces the movement speed of the aggregate lumps within the delivery pipe, thereby reducing the outlet velocity. This reduction in outlet velocity quadratically decreases the kinetic energy of the aggregate lumps. Reduced kinetic energy means a decrease in the instantaneous impact force when the aggregate lumps strike the sound insulation layer, i.e., the impact energy. This keeps the impact force within the elastic bearing capacity of the sound insulation layer, preventing damage to the sound insulation layer. The physical damage was prevented, ensuring the integrity of the sound insulation system of the sound insulation pad. Furthermore, the water-cement ratio of the lightweight concrete was determined based on the estimated impact force. Specifically, the water-cement ratio was reduced by adding polycarboxylate superplasticizer at the inlet of the pumping device while simultaneously utilizing the continuous rotation of the pump truck's mixing hopper to ensure uniform mixing of the freshly mixed concrete before it entered the delivery pipe. This reduced the water-cement ratio, increased the yield stress and plastic viscosity of the cement paste, and resulted in a higher drag force on the aggregate from the high-viscosity paste, effectively suspending it. The aggregate inhibits the settling and agglomeration of aggregates, reducing the formation of subsequent aggregate lumps from the source. Furthermore, the reduced water-cement ratio decreases the porosity and increases the strength of the hardened concrete matrix. Even if a small number of aggregate lumps remain, the concrete matrix can better coordinate with the aggregate lumps in deformation, diffusing the point load generated by the aggregate lumps into a surface load. This reduces the stress concentration transmitted from the lightweight concrete to the sound insulation layer, thereby reducing the probability of generating new high-density aggregate lumps during subsequent pumping and improving the overall stiffness matching of the floor structure. Ultimately, this improves the preparation efficiency of the thermal insulation and soundproof floor structure.

[0078] Specifically, the thermal insulation and soundproof floor structure prepared by the method of the lightweight concrete-based thermal insulation and soundproof floor structure of the present invention includes: a concrete floor slab for providing vertical upward support; a sound insulation pad layer laid on and covering the upper surface of the concrete floor slab to block solid sound transmission paths and provide elastic support; vertical sound insulation sheets partially connected to the sound insulation pad layer to isolate the rigid connection between the lightweight concrete layer and the wall located on the side of the concrete floor slab; a lightweight concrete layer laid between the sound insulation pad layer and the vertical sound insulation sheets to achieve thermal insulation and sound insulation; and a surface layer laid on top of the lightweight concrete layer to work together with the lightweight concrete layer to form a sound insulation system.

[0079] Specifically, the vertical height of the vertical sound insulation strip is greater than the height of the lightweight concrete layer after it is laid.

[0080] Specifically, the surface layer is a cement-based self-leveling layer.

[0081] Specifically, the density of the vertical sound insulation panels is... The Shore hardness is 30±5A; the thickness of the vertical sound insulation sheet is 8mm, with a tolerance of ±0.5mm; the height of the vertical sound insulation sheet is 70mm, with a tolerance of ±2mm; the length of the vertical sound insulation sheet is 50m, and it is cut based on the actual length of the wall.

[0082] In implementation, this invention forms a floating floor structure by setting a sound-insulating pad between the concrete floor slab and the lightweight concrete layer. The sound-insulating pad physically and elastically decouples the upper floor structure from the lower load-bearing concrete floor slab, effectively cutting off the path of impact sounds, such as footsteps and falling objects, propagating downwards through the rigid concrete structure. By setting vertical sound-insulating sheets and partially connecting them to the sound-insulating pad, the rigid contact between the lightweight concrete layer and the side walls is isolated. This prevents sound energy from being transmitted laterally through the connection between the floor slab edge and the wall, thus reducing the impact of the sound bridge effect on the side walls and ensuring the integrity of the sound insulation system. Due to its lower density, the lightweight concrete layer reduces the constant load on the floor structure, and the porous structure inside the lightweight concrete provides additional thermal resistance, reducing building energy consumption. The surface layer and the lightweight concrete layer together constitute a composite sound insulation system. The surface layer, through its mass, forms a mass spring system with the underlying lightweight concrete layer, further enhancing the isolation capability for mid-to-high frequency airborne sound.

[0083] Specifically, the lightweight concrete layer comprises cement, fly ash, shale ceramsite as lightweight aggregate, sand, water, polycarboxylate superplasticizer, and sodium fatty acid air-entraining agent in a mass ratio of 1:0.3:4.0:2.0:0.5:0.02:0.004.

[0084] In implementation, this invention achieves low concrete density and provides thermal insulation and soundproofing properties by using a 4.0:1 mass ratio of shale ceramsite (lightweight aggregate) to cement. The addition of polycarboxylate superplasticizer (0.02 by mass) improves the fluidity and dispersibility of the cement paste at a water-cement ratio of 0.5 (0.5:1), enhancing the pumpability of the lightweight concrete during pumping. Simultaneously, the polycarboxylate superplasticizer allows the highly cohesive paste to effectively encapsulate the lightweight aggregate, preventing the shale ceramsite from floating or segregating during transportation and pouring, thus ensuring the homogeneity of the lightweight concrete layer. The introduction of sodium fatty acid air-entraining agent (0.004 by mass) introduces air bubbles into the concrete. These air bubbles further reduce the thermal conductivity of concrete, improving its insulation effect. Furthermore, as an elastic medium, they absorb sound wave energy, enhancing the material's sound absorption performance. Fly ash, with a mass ratio of 0.3, acts as an active admixture. The microsphere effect of fly ash improves the workability of the mixture, reducing water requirements. In the later stages of hardening, the pozzolanic reaction of fly ash consumes calcium hydroxide, generating additional hydrated calcium silicate gel that fills the microcracks in the interface transition zone, improving the volume stability of the lightweight concrete layer and reducing shrinkage cracks. This prevents sound bridge leakage caused by cracks. The composition of the lightweight concrete, including its mass ratio, is optimized through matching, improving the thermal insulation, sound insulation, and mechanical properties of the insulated and soundproof floor structure.

[0085] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for preparing a lightweight concrete-based thermally insulated and soundproof floor structure, characterized in that, include: A sound insulation pad is laid on the upper surface of the concrete floor slab, and a vertical sound insulation sheet is installed between the sound insulation pad and the wall above the concrete floor slab. Lightweight concrete mortar is mixed to obtain lightweight concrete, and the lightweight concrete is pumped onto the working surface of the sound insulation layer; several vibration intensities on the outer wall of the conveying pipe during the pumping process are obtained; the wear position of the inner wall of the conveying pipe is determined according to the vibration intensity; the outlet velocity of the aggregate clumps in the lightweight concrete at the outlet is calculated based on the wear position and the nearest pipe distance to the outlet of the conveying pipe. The estimated impact force of the aggregate agglomerates on the sound insulation layer is determined based on the outlet speed; the pumping speed of the lightweight concrete is adjusted according to the estimated impact force, wherein the water-cement ratio of the lightweight concrete is determined based on the estimated impact force; the pumping process of the lightweight concrete is completed according to the pumping speed and the water-cement ratio, and leveling, compaction, curing and surface layer laying are carried out in sequence to complete the preparation of the thermal insulation and sound insulation floor structure of the lightweight concrete base.

2. The method for preparing a lightweight concrete-based thermal and sound-insulating floor structure according to claim 1, characterized in that, The step of determining the wear location of the inner wall of the conveying pipe based on the vibration intensity includes: comparing the vibration intensity with a preset intensity; if the vibration intensity is greater than the preset intensity, it is determined that the wear degree of the aggregate clumps in the lightweight concrete on the inner wall of the conveying pipe does not meet the requirements, and the wear location is determined.

3. The method for preparing a lightweight concrete-based thermal and sound-insulating floor structure according to claim 2, characterized in that, The wear location is the location of the vibration intensity sampling point on the outer wall of the conveying pipe where the vibration intensity is greater than the preset intensity.

4. The method for preparing a lightweight concrete-based thermal and sound-insulating floor structure according to claim 3, characterized in that, The calculation of the outlet velocity of aggregate lumps in lightweight concrete at the outlet based on the nearest pipe distance between the wear location and the outlet of the conveying pipe includes: obtaining the nearest pipe distance between the wear location and the outlet of the conveying pipe; calculating the pressure loss of the aggregate lumps moving from the wear location to the outlet based on the pipe distance and the pipe friction attenuation coefficient; determining the outlet residual pressure based on the current pumping pressure of the pumping process and the pressure loss; and determining the outlet velocity by multiplying the square root of the outlet residual pressure corresponding to the pressure loss and the velocity-pressure conversion coefficient.

5. The method for preparing a lightweight concrete-based thermal and sound-insulating floor structure according to claim 4, characterized in that, The remaining pressure at the outlet is the difference between the current pumping pressure and the pressure loss.

6. The method for preparing a lightweight concrete-based thermal and sound-insulating floor structure according to claim 5, characterized in that, The estimated impact force is the product of the exit velocity and the velocity-impact force conversion coefficient.

7. The method for preparing a lightweight concrete-based thermal and sound-insulating floor structure according to claim 6, characterized in that, The step of adjusting the pumping speed of the lightweight concrete according to the estimated impact force includes: comparing the estimated impact force with the preset impact force; if the estimated impact force is greater than the preset impact force, it is determined that the impact force of the pumping on the sound insulation layer does not meet the requirements due to aggregate agglomerates, and the pumping speed of the lightweight concrete is reduced, wherein the pumping speed is negatively correlated with the estimated impact force.

8. The method for preparing a lightweight concrete-based thermal and sound-insulating floor structure according to claim 7, characterized in that, The water-cement ratio is negatively correlated with the estimated impact force.

9. A lightweight concrete-based thermal and sound-insulating floor structure, characterized in that, It is manufactured by the method of preparing a lightweight concrete-based thermal insulation and soundproof floor structure according to any one of claims 1 to 8. The lightweight concrete-based thermal insulation and soundproof floor structure includes: a concrete floor slab for providing vertical upward support; a sound insulation pad layer laid and covering the upper surface of the concrete floor slab to block solid sound transmission paths and provide elastic support; vertical sound insulation strips partially connected to the sound insulation pad layer to isolate the rigid connection between the lightweight concrete layer and the wall located on the side of the concrete floor slab; a lightweight concrete layer laid between the sound insulation pad layer and the vertical sound insulation strips to achieve thermal insulation and sound insulation; and a surface layer laid on top of the lightweight concrete layer to form a sound insulation system in conjunction with the lightweight concrete layer.

10. The lightweight concrete-based thermal and sound-insulating floor structure according to claim 9, characterized in that, The lightweight concrete layer comprises cement, fly ash, shale ceramsite as lightweight aggregate, sand, water, polycarboxylate superplasticizer, and sodium fatty acid air-entraining agent in a mass ratio of 1:0.3:4.0:2.0:0.5:0.02:0.004.

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