A rapid preparation method of a locally-sourced temporary building sandwich panel

Abstract

The application discloses a kind of in-situ temporary building sandwich panel fast preparation method, comprising the following steps: preparing raw soil component;Preparation of alkali-activated foamed concrete;First perfusion;Second perfusion;Third perfusion;Restoration;Maintenance;Assemble.The beneficial effects of the present application: raw soil is in-situ, easy to dig and obtain, avoids the problem of material shortage in the process of sandwich panel preparation, while replacing rock wool to save cost, and has good environmental performance;The sandwich panel prepared has good strength and thermal insulation performance, can meet the requirements of temporary housing, ensure that the prepared sandwich panel can cope with unexpected situations, and the quality is reliable.

Description

Technical Field

[0001] This invention belongs to the field of sandwich panel preparation technology for temporary buildings, and specifically relates to a rapid preparation method for temporary building sandwich panels using locally sourced materials. Background Technology

[0002] Sandwich panels have a wide range of applications in temporary construction, especially in the face of sudden emergencies where rapid preparation is crucial. While the outer metal layer of sandwich panels is relatively easy to manufacture, the reserves of materials such as rock wool used internally are prone to shortages in emergencies, and the preparation time for rock wool panels is also lengthy, failing to meet the needs of emergency situations. Therefore, a production method that utilizes locally sourced materials for rapid preparation is an important way to address the shortage of panel production during emergencies. Summary of the Invention

[0003] The purpose of this invention is to provide a rapid preparation method for temporary building sandwich panels using locally sourced materials, which solves the problem of insufficient preparation time for sandwich panels in emergency situations.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A rapid preparation method for temporary building sandwich panels using locally sourced materials includes the following steps:

[0006] Step 1, Preparation of raw soil component: Mix raw soil, slaked lime, water and water-reducing agent evenly to obtain raw soil component;

[0007] Step 2, Preparation of alkali-activated foamed concrete: Foam is obtained by foaming the foaming agent. Blast furnace ore powder, water glass, sodium hydroxide, water and water-reducing agent are mixed evenly to obtain the base. The foam and the base are mixed evenly to obtain alkali-activated foamed concrete.

[0008] Step 3, One-time pouring: Pour the alkali-activated foamed concrete into the base slab and evenly fill the bottom space;

[0009] Step 4, Secondary Injection: Inject the raw soil component into the base slab and evenly fill the middle layer space. Then, vibrate and mix the raw soil component and alkali-activated foamed concrete in the base slab evenly.

[0010] Step 5, three-stage pouring: pour the alkali-activated foamed concrete into the base slab and fill the top layer space evenly. Then, vibrate and mix the raw soil components and alkali-activated foamed concrete in the base slab evenly.

[0011] Step 6, static repair: Allow the core fusion body inside the base plate to stand still, and then observe the settlement of the core fusion body. If settlement occurs, pour alkali-activated foamed concrete to repair it.

[0012] Step 7, Curing: Curing the core fusion body inside the base plate;

[0013] Step 8, Assembly: Connect the top plate to the bottom plate.

[0014] Furthermore, in step 1, the raw soil is obtained by excavating the ground. First, the surface layer of humus and debris is removed, and then the lower layer of raw soil is excavated for later use.

[0015] Furthermore, in step 1, the mass ratio of raw soil, slaked lime, water and water-reducing agent is (80-120):(8-12):(16-24):(2.4-3.6).

[0016] Furthermore, in step 1, the mass ratio of raw soil, slaked lime, water, and water-reducing agent is 100:10:20:3.

[0017] Furthermore, step 2 also includes:

[0018] Step 2.1, preparing foam: Dilute the foaming agent and add it to the foaming machine for foaming, and put the resulting foam into a container;

[0019] Step 2.2, Preparation of the substrate: Mix blast furnace ore powder, water glass, sodium hydroxide, water and water-reducing agent and stir evenly to ensure that the water-cement ratio is 0.25-0.5, and use sodium hydroxide to adjust the modulus of water glass to 1.0-1.5. The mass ratio of Na element to ore powder is ≥3%, and the mass ratio of water-reducing agent to ore powder is 2%-4%.

[0020] Step 2.3, mixing foam and substrate: Mix 70% to 90% by volume of foam with 10% to 30% by volume of substrate and stir evenly to obtain alkali-activated foamed concrete.

[0021] Furthermore, in step 2.1, the foaming agent is AES foaming agent, and the foam is produced by diluting the foaming agent 20 times and passing it through a foaming machine.

[0022] Furthermore, in step 2.2, the mixture is first stirred at low speed for 1 minute, and then stirred at high speed for 30 seconds; in step 2.3, the mixture is stirred at low speed for 1 minute.

[0023] Furthermore, in step 2, the blast furnace ore powder is S95 grade slag, and its indicators include an activity coefficient H0 greater than 0.25, an alkalinity coefficient M0 greater than 1.0, a hydraulic coefficient b greater than 1.0, and a mass coefficient K greater than 1.2; each coefficient is calculated using the weight of each component: H0 = Al2O3 / SiO2, M0 = (CaO+MgO) / (SiO2+Al2O3), b = (CaO+MgO+Al2O3) / SiO2, K = (CaO+MgO+Al2O3) / (SiO2+MnO+TiO2); the water glass has a solid content ≥32%; the sodium hydroxide is industrial sodium hydroxide with a purity ≥95%; and the water-reducing agent is a polycarboxylate water-reducing agent.

[0024] Furthermore, in step 3, the alkali-activated foamed concrete is poured to 1 / 5 to 1 / 3 of the height of the base slab; in step 4, the raw soil component is poured to 2 / 3 to 4 / 5 of the height of the base slab; in step 5, the alkali-activated foamed concrete is poured to be flush with the top of the side wall of the base slab.

[0025] Furthermore, in step 7, the curing environment is a curing room with a temperature of 20±2℃ and a humidity of not less than 95%.

[0026] Furthermore, in step 8, the bottom plate is in the shape of a rectangular box, the top plate is in the shape of a rectangular cover, the top plate is fastened to the bottom plate, and the bottom plate and the top plate are connected by a connecting buckle.

[0027] The beneficial effects of this invention are:

[0028] 1. Raw soil is a locally sourced material that is easy to dig up, avoiding the problem of material shortage during the preparation of sandwich panels. It also saves costs by replacing rock wool and has good environmental performance.

[0029] 2. The resulting sandwich panels have good strength and thermal insulation properties, which can meet the requirements of temporary buildings, ensure that the resulting sandwich panels can cope with emergencies, and have reliable quality.

[0030] The aforementioned main solution of the present invention and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed by the present invention; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding the solution of the present invention, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected by the present invention, and will not be exhaustively listed here. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention.

[0032] In the diagram: 1-base slab, 2-top slab, 3-raw soil components, 4-alkali-activated foamed concrete. Detailed Implementation

[0033] The following non-limiting examples are used to illustrate the present invention.

[0034] Example 1:

[0035] refer to Figure 1 As shown, a rapid preparation method for temporary building sandwich panels using locally sourced materials includes the following steps: Step 1, preparing raw soil components: Raw soil is obtained by excavating the ground with an excavator. First, the surface layer of humus and debris is removed, and then the lower layer of raw soil is excavated for later use.

[0036] Raw soil, slaked lime, water and water-reducing agent are mixed evenly, with the mass ratio of raw soil, slaked lime, water and water-reducing agent being 100:10:20:3, to obtain raw soil component 3.

[0037] Step 2, Preparation of alkali-activated foamed concrete: Foam is obtained by foaming with foaming agent. Blast furnace ore powder, water glass, sodium hydroxide, water and water-reducing agent are mixed evenly to obtain the base. The foam and base are mixed evenly to obtain alkali-activated foamed concrete 4.

[0038] Specifically, this includes: Step 2.1, preparing foam: diluting AES foaming agent by 20 times and adding it to a foaming machine for foaming, and then using a container to hold the resulting foam.

[0039] Step 2.2, Preparation of the substrate: Mix blast furnace ore powder, water glass, sodium hydroxide, water and water-reducing agent and stir evenly. First stir the mixture at low speed for 1 minute, then stir at high speed for 30 seconds. The water-cement ratio is 0.25-0.5. Use sodium hydroxide to adjust the modulus of water glass to 1.0-1.5. The mass ratio of Na element to ore powder is ≥3%, and the mass ratio of water-reducing agent to ore powder is 2%-4%.

[0040] The blast furnace ore powder is S95 grade slag, with the following specifications: activity coefficient H0 > 0.25, basicity coefficient M0 > 1.0, hydraulic coefficient b > 1.0, mass coefficient K > 1.2, and specific surface area ≥ 400 m². 2 / kg. All coefficients are calculated using the weight of each component: H0=Al2O3 / SiO2, M0=(CaO+MgO) / (SiO2+Al2O3), b=(CaO+MgO+Al2O3) / SiO2, K=(CaO+MgO+Al2O3) / (SiO2+MnO+TiO2).

[0041] Water glass and sodium hydroxide are used as alkali activators. The water glass has a solid content of ≥32%, the sodium hydroxide is industrial sodium hydroxide with a purity of ≥95%, and the water-reducing agent is a polycarboxylate water-reducing agent.

[0042] Step 2.3, Foam and Substrate Mixing: Mix 75% by volume of foam with 25% by volume of substrate and stir evenly. Stir the mixture at low speed for 1 minute to obtain alkali-activated foamed concrete 4.

[0043] Step 3, one-time pouring: pour alkali-activated foamed concrete 4 into the base plate 1 and evenly fill the bottom space. Pour the alkali-activated foamed concrete 4 to 1 / 4 of the height of the base plate 1.

[0044] Step 4, Secondary Injection: Inject raw soil component 3 into the base slab 1 and evenly fill the middle layer space, that is, the upper layer of alkali-activated foamed concrete 4. Inject raw soil component 3 to 3 / 4 of the height of the base slab 1. Then use a vibrator to vibrate and mix the raw soil component 3 and alkali-activated foamed concrete 4 in the base slab 1 until the raw soil component 3 is integrated into the alkali-activated foamed concrete 4.

[0045] Step 5, three-stage pouring: pour the alkali-activated foamed concrete 4 into the base slab 1 and fill the top layer space evenly. Pour the alkali-activated foamed concrete 4 until it is flush with the top of the side wall of the base slab 1. Then, vibrate and mix the raw soil component 3 and the alkali-activated foamed concrete 4 in the base slab 1 until all materials are fused and in a plastic state.

[0046] Step 6, static repair: Let the core fusion body inside the base plate 1 stand for one hour, and then observe the settlement of the core fusion body. If settlement occurs, pour alkali-activated foamed concrete 4 to repair it.

[0047] Step 7, Curing: Curing the core fusion body inside the base plate 1 in a curing room with a temperature of 20±2℃ and a humidity of not less than 95%.

[0048] Step 8, Assembly: Connect the top plate 2 to the bottom plate 1. Both the bottom plate 1 and the top plate 2 have side walls. The height of the side wall of the bottom plate 1 is the thickness of the sandwich panel minus the thickness of the top plate 2. The height of the side wall of the top plate 2 is 0.5-2cm. The bottom plate 1 is a rectangular box, and the top plate 2 is a rectangular lid. The top plate 2 is fastened onto the bottom plate 1. The bottom plate 1 and the top plate 2 are connected by a connecting buckle. Mark the height of the three pours on the side wall of the bottom plate 1 beforehand. The proportion of the three pours needs to be adjusted according to the performance requirements of the required board material and the properties of the raw soil.

[0049] Raw soil is rich in SiO2 and CaO. Adding slaked lime replenishes its alkaline components, generating an alkaline stimulus that hardens the soil and produces higher strength. Alkali-activated foamed concrete possesses high strength, low density, low thermal conductivity, and good fluidity. Mixing the two maximizes the use of locally sourced materials and reduces costs while ensuring the density, strength, and fluidity of the fused material. Furthermore, because its density is close to that of water, after the temporary structure reaches the end of its service life, the outer metal plate can be directly removed, and the crushed internal material can be directly used for backfilling foundation pits, trenches, etc. Alternatively, an alkali activator can be added to increase the material's viscosity for reuse in the preparation of new panels. This product uses no cement, employs readily available materials, has good environmental performance, and can effectively replace materials such as rock wool. The density of the prepared material is ≤1000 kg / m³. 3 Thermal conductivity and insulation coefficient ≤ 0.3 W / (m·k), compressive strength ≥ 1.0 MPa.

[0050] Example 2:

[0051] refer to Figure 1 As shown, a rapid preparation method for temporary building sandwich panels using locally sourced materials is presented. This embodiment differs from Embodiment 1 in that: in step 1, the mass ratio of raw soil, slaked lime, water, and water-reducing agent is 80:12:16:3.6; in step 2, 83% by volume of foam and 17% by volume of substrate are mixed and stirred until homogeneous. The prepared material has a density ≤800 kg / m³. 3 Thermal conductivity and insulation coefficient ≤ 0.27 W / (m·k), strength ≥ 0.4 MPa.

[0052] Example 3:

[0053] refer to Figure 1 As shown, a rapid preparation method for temporary building sandwich panels using locally sourced materials is presented. This embodiment differs from Embodiment 1 in that: in step 1, the mass ratio of raw soil, slaked lime, water, and water-reducing agent is 120:8:24:2.4; in step 2, 90% by volume of foam and 10% by volume of substrate are mixed and stirred until homogeneous. The prepared material has a density ≤700 kg / m³. 3 Thermal conductivity and insulation coefficient ≤ 0.25 W / (m·k), strength ≥ 0.3 MPa.

[0054] The foregoing basic examples and their further alternative examples of the present invention can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed by the present invention. In the present invention, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for rapidly preparing a locally-sourced temporary building sandwich panel, characterized in that, It comprises the following steps: Step 1, preparation of raw soil component: the raw soil, lime, water and water reducing agent are mixed uniformly to prepare the raw soil component (3); in the step 1, the mass ratio of the raw soil, lime, water and water reducing agent is (80-120):(8-12):(16-24):(2.4-3.6); Step 2, preparation of alkali-activated foamed concrete: the foaming agent is foamed to prepare the foam, the blast furnace slag, water glass, sodium hydroxide, water and water reducing agent are mixed uniformly to prepare the base, and the foam and the base are mixed uniformly to prepare the alkali-activated foamed concrete (4); Step 3, first pouring: the alkali-activated foamed concrete (4) is poured into the bottom plate (1) and uniformly fills the bottom space; Step 4, second pouring: the raw soil component (3) is poured into the bottom plate (1) and uniformly fills the middle space, and then the raw soil component (3) and the alkali-activated foamed concrete (4) in the bottom plate (1) are vibrated and stirred uniformly; Step 5, third pouring: the alkali-activated foamed concrete (4) is poured into the bottom plate (1) and uniformly fills the top space, and then the raw soil component (3) and the alkali-activated foamed concrete (4) in the bottom plate (1) are vibrated and stirred uniformly; Step 6, standing repair: the sandwich fusion body in the bottom plate (1) is placed, and then the settlement of the sandwich fusion body is observed, and if settlement occurs, the alkali-activated foamed concrete (4) is poured for repair; Step 7, curing: the sandwich fusion body in the bottom plate (1) is cured; Step 8, assembly: the top plate (2) is connected with the bottom plate (1).

2. The method according to claim 1, wherein the method is characterized by: In the step 1, the raw soil is obtained by excavating the ground, and the humus soil and sundries on the surface of the ground are first removed, and then the lower layer of raw soil is excavated for use.

3. The method of claim 1, wherein the method further comprises: In the step 1, the mass ratio of the raw soil, lime, water and water reducing agent is 100:10:20:

3.

4. The method of claim 1, wherein the method further comprises: The step 2 further comprises: Step 2.1, preparation of foam: the foaming agent is diluted and then added to the foaming machine for foaming, and the generated foam is contained in a container; Step 2.2, preparation of base: the blast furnace slag, water glass, sodium hydroxide, water and water reducing agent are mixed and stirred uniformly, the water-binder ratio is ensured to be 0.25-0.5, the water glass modulus is adjusted to 1.0-1.5 using sodium hydroxide, the mass ratio of Na element to blast furnace slag is ≥3%, and the mass ratio of water reducing agent to blast furnace slag is 2%-4%; Step 2.3, mixing of foam and base: the foam with a volume percentage of 70%-90% and the base with a volume percentage of 10%-30% are mixed and stirred uniformly to prepare the alkali-activated foamed concrete (4).

5. The method according to claim 4, wherein the method is characterized by: In the step 2.1, the foaming agent is AES foaming agent, and the foam is generated by diluting the foaming agent 20 times through the foaming machine.

6. The method of claim 4, wherein the method further comprises: In the step 2.2, the mixture is stirred at low speed for 1 minute and then at high speed for 30 seconds; in the step 2.3, the mixture is stirred at low speed for 1 minute.

7. The method according to claim 4 or 5, wherein the method is characterized in that: The step 2, the blast furnace ore powder is S95 grade slag, and indexes thereof include an activity coefficient H0 greater than 0.25, an alkalinity coefficient M0 greater than 1.0, a hydraulicity coefficient b greater than 1.0, and a quality coefficient K greater than 1.2; each coefficient is calculated using the weight of each component: H0=Al2O3 / SiO2, M0=(CaO+MgO) / (SiO2+Al2O3), b=(CaO+MgO+Al2O3) / SiO2, K=(CaO+MgO+Al2O3) / (SiO2+MnO+TiO2); the water glass contains solid content greater than or equal to 32%; the sodium hydroxide is industrial sodium hydroxide with a purity greater than or equal to 95%; and the water reducing agent is a polycarboxylic acid water reducing agent.

8. The method of claim 1, wherein the method further comprises: In the step 3, the alkali-activated foamed concrete (4) is poured to a position at a height of 1 / 5 to 1 / 3 of the bottom plate (1); in the step 4, the raw soil component (3) is poured to a position at a height of 2 / 3 to 4 / 5 of the bottom plate (1); and in the step 5, the alkali-activated foamed concrete (4) is poured to a position flush with the top end of the side wall of the bottom plate (1).

9. The method of claim 1, wherein the method further comprises: In the step 8, the bottom plate (1) is in a rectangular box shape, the top plate (2) is in a rectangular cover shape, the top plate (2) is buckled on the bottom plate (1), and the bottom plate (1) and the top plate (2) are connected through a connecting buckle.

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