A lightweight structural component for building, a splicing method thereof, and a spliced ​​component

Abstract

The present invention relates to the technical field of building structural components prepared with lightweight concrete, and specifically to a building lightweight structural component and a splicing method thereof and a splicing component, comprising a component body, one end of the component body used for splicing protrudes outward to form a splicing portion, the width of the splicing portion is smaller than the width of the component body, so that the ends of the component body form a first step on both sides of the splicing portion in the width direction; the end face of the splicing portion away from the component body is a plane, and the plane serves as the splicing surface of the lightweight structural component. The lightweight structural component of the present invention adopts convex-convex splicing during splicing, and splicing materials are used to close the gap at the joint during the splicing process, which solves the problem of cracks at the joint of the lightweight structural component caused by the existing convex-concave splicing method.

Description

Technical Field

[0001] The invention relates to the technical field of building structural components prepared by lightweight concrete, and in particular to a building lightweight structural component and a splicing method and a spliced ​​component. Background Art

[0002] Precast panels made of lightweight concrete are common structural components in building construction. One form of precast panels is a thinner component, and the specific shape can be various thin plates, flat plates, etc.

[0003] In order to facilitate processing and transportation, the size of prefabricated panels made of lightweight concrete is usually not too large. When used, multiple prefabricated panels need to be spliced ​​together. However, cracks are prone to appear at the joints of existing prefabricated panels.

[0004] At present, the convex-concave splicing method and the shrinkage compensation technology are usually used to solve the crack problem at the joints of prefabricated panels. Figure 1 As shown; in response to the continuous shrinkage deformation of lightweight structural components, the single combination of the convex-concave splicing method and the shrinkage compensation material in the prefabricated board still has the generation of splicing cracks. The shrinkage compensation material needs to be directly bonded to the joints of the prefabricated board due to the convex-concave splicing method. When the shrinkage deformation of the prefabricated board is accidentally increased by external factors; or the shrinkage compensation material cannot offset or compensate for the stress caused by the shrinkage deformation of the prefabricated board, micro cracks will appear at the joints or directly lead to the breakage of the shrinkage compensation material. Summary of the invention

[0005] The object of the present invention is to provide a lightweight structural component for construction and a splicing method thereof. The lightweight structural component adopts convex-convex splicing during splicing, and the gaps at the joints are sealed with splicing materials during the splicing process, which can avoid direct adhesion of the compensation shrinkage material and the gaps at the joints of the lightweight structural component, and the splicing material can serve as a structural layer of the joint and the compensation shrinkage material; the compensation shrinkage material is protected to continuously offset and compensate for the shrinkage of the lightweight structural component, thereby solving the problem of cracks at the joints of the lightweight structural component caused by the existing convex-concave splicing method.

[0006] In addition, the present invention also provides a spliced ​​wall formed by splicing the above-mentioned lightweight structural components using the above-mentioned splicing method.

[0007] The present invention is achieved through the following technical solutions:

[0008] A lightweight structural member comprises a member body, wherein one end of the member body for splicing protrudes outward to form a splicing portion, the width of the splicing portion is smaller than the width of the member body, so that the ends of the member body form a first step on both sides of the splicing portion in the width direction; an end face of the splicing portion away from the member body is a plane, and the plane serves as a splicing surface of the lightweight structural member;

[0009] When two lightweight structural components are spliced, the corresponding splicing surfaces of the two lightweight structural components abut against each other, so that a first groove is formed on both sides of the two splicing parts in the width direction. The first groove is used to set the splicing structural layer and the compensating shrinkage structural layer. The splicing structural layer is used to cover the gap between the two splicing parts, and the compensating shrinkage structural layer is used to fill the remaining space in the first groove.

[0010] The applicant analyzed the existing joint splicing method of prefabricated panels, the shrinkage compensating materials at the joints, and the cracks at the joints, and found that the existing concave-convex splicing method would cause cracks at the joints of prefabricated panels or directly cause the shrinkage compensating materials to break because:

[0011] 1) The concave-convex splicing method cannot prevent the shrinkage compensation material from flowing into the gap at the joint: The concave-convex splicing method allows the shrinkage compensation material to flow directly into the gap at the joint. As the lightweight structural components continue to shrink, the stress of the shrinkage compensation material from the gap at the joint will also increase. Since part of the shrinkage compensation material will flow into the gap at the joint, the shrinkage compensation material needs to offset or compensate for the double stress inside and outside the gap at the joint; in addition, the shrinkage compensation material will flow into the gap at the joint, which also leads to a larger amount of shrinkage compensation material used, and the effect is not great.

[0012] 2) The shrinkage compensating material is always in a completely direct bonding state with the joints, lacking a structural layer: The shrinkage compensating material is basically a material with cement-based binder components as the core. Cement-based binder is easily affected by stress changes or strains during the hardening stage, so there is a lack of a structural layer between the shrinkage compensating material and the joints.

[0013] The seam of the present invention can also be called a patchwork seam. Figure 1 The first groove is shown.

[0014] The present invention improves the structure of the existing prefabricated board material so that the end surface of the splicing part away from the component body is a plane. The plane serves as the splicing surface of the lightweight structural component, which can realize the convex-convex splicing of two lightweight structural components, and a first groove is formed on the width side wall of the splicing part of the two lightweight structural components. The splicing structural layer and the compensating shrinkage structural layer can be set through the first groove, wherein the splicing structural layer can completely close the gap at the joint of the lightweight structural component, and can avoid the problem of compensating shrinkage material flowing into the gap at the joint due to the direct and complete bonding of the compensating shrinkage material to the joint, and the splicing structural layer can be used as a structural layer between the joint and the compensating shrinkage structural layer.

[0015] In summary, when the lightweight structural components of the present invention are used for convex-convex splicing, the shrinkage compensation material can be protected to continuously offset and compensate for the shrinkage of the lightweight structural components, thereby solving the problem of cracks at the joints of lightweight structural components caused by the existing convex-concave splicing method.

[0016] The splicing materials used in the splicing structural layer include the following components in parts by weight:

[0017] 20-40 parts of inorganic gel thickener, 60-80 parts of stone powder, 2-10 parts of tackifier, 0.01-0.1 parts of dispersant and 30-50 parts of water

[0018] The splicing material of the present invention has no strength and will powder when subjected to stress, which means that when the splicing material is subjected to a small external force (less than or equal to 0.1MPa), its structure will quickly disintegrate and become powder, thereby losing its original physical shape and bearing capacity. When the material is prepared into a 70.5*70.5*70.5 mortar test block, it will powder when subjected to a pressure less than 0.1MPa, the test block will break and become brittle, and the original test block shape cannot be maintained.

[0019] Functional structural layer (structural layer) refers to the splicing material that can maintain its physical properties and bearing capacity as well as its shape after molding when not subjected to any external force, and will powder when subjected to force. When the splicing material is applied to the joint, it has certain physical properties, can maintain its shape after construction, does not slide down, has good adhesion, appropriate ductility, certain construction performance, stability, and the splicing material has no strength and powders when subjected to force. If it powders when subjected to force, it will not cause damage to the compensating shrinkage mortar, and can be used as a functional structural layer.

[0020] The splicing material prepared by the present invention uses inorganic gel thickener and stone powder as main raw materials, tackifier and dispersant as auxiliary materials, and adds water. The splicing material can achieve no strength and pulverize when subjected to stress. It can be used as a functional structural layer at the joints, solving the problem of cracks at the joints of lightweight structural components.

[0021] Preferably, the weight ratio of the inorganic gel thickener to the powder in the formula is 15-40%, preferably 30%; the water-powder ratio is 0.3-0.4, and the water-powder ratio is the weight ratio of water to powder; since the amount of dispersant used is small, it can be ignored, and the powder is the sum of the amounts of the inorganic gel thickener, stone powder and tackifier.

[0022] Among them, the inorganic gel thickener is a gel mineral that absorbs water and expands to form thixotropy, that is, the inorganic gel thickener can absorb water to become a gel-like substance. Adding the inorganic gel thickener makes it easy to put the splicing material on the wall. However, the dosage needs to be reasonably controlled. If the inorganic gel thickener is used in too much amount, the viscosity will be too high and it will be difficult to put on the wall. If the dosage is too little, the splicing material will be easy to fall off; and if the inorganic gel thickener is used in too much amount, the splicing material will be applied with a thin thickness, causing the gel-like substance to crack directly after losing water. Specifically, the weight ratio of the inorganic gel thickener to the overall powder in the formula is optimal at 0.3. If the weight ratio of the inorganic gel thickener to the overall powder in the formula is greater than 0.4, the viscosity of the splicing material will be too high and it will be difficult to put on the wall; if the weight ratio of the inorganic gel thickener to the overall powder in the formula is less than 0.15, the viscosity of the splicing material will be too low and it will be easy to fall off. Therefore, the weight ratio of the inorganic gel thickener to the powder in the formula is set to 15-40%. Specifically, the inorganic gel thickener includes at least one of bentonite, attapulgite, kaolin, montmorillonite and aluminum silicate, preferably bentonite.

[0023] Among them, stone powder has poor adhesion when used alone, and after losing water, it will be powdered and fall due to its own weight. However, the present invention uses an inorganic gel thickener and stone powder in combination, and fills the stone powder on the gelled substance, so that the gel substance after the inorganic gel thickener is added with water has a powdering effect, which solves the problem of not having a powdering effect caused by using an inorganic gel thickener alone. Specifically, the parent rock of the stone powder includes at least one of quartz, limestone, granite, gneiss, breccia, basalt and dolomite, and the fineness is 40-400 mesh.

[0024] Among them, the tackifier can make the splicing material have a certain ductility, and can also improve the adhesion of the splicing material, making it easier for the splicing material to adhere to the joint. The tackifier includes glue powder.

[0025] Among them, the dispersant can make the slurry more uniform and make the coating state of the splicing material better.

[0026] Therefore, the splicing material of the present invention provides a network structure through stone powder and inorganic gel thickener. The structure of stone powder is like calcite and is prismatic. It plays a filling and adhesion role in the splicing material. The volume of the inorganic gel thickener increases after absorbing water to form a gel substance. The stone powder is filled on the inorganic gel thickener, so that the gel substance after the inorganic gel thickener is added with water has a powdering effect. The thickener plays a filling role and makes the splicing material have a certain ductility. It can also enhance the viscosity of the splicing material, so that the splicing material can better adhere to the splicing seam, which is convenient for construction.

[0027] Moreover, in the formula of the splicing material of the present invention, the amount of each component is also critical. When an inorganic gel thickener, stone powder and a tackifier are used in combination, a splicing material with better performance can be prepared by reasonably designing the amount of each component. Since the inorganic gel thickener has a large viscosity and is not easy to pulverize, the splicing material can only be used in a small amount, and its weight ratio to the powder in the formula cannot exceed 40%. However, when the inorganic gel thickener is used in a small amount, the bonding performance of the splicing material is weak. At this time, adding a certain amount of tackifier can make the splicing material have a certain ductility, and can also improve the bonding performance of the splicing material, making it easier to adhere to the joints.

[0028] In a preferred embodiment, the splicing portion is a structure with one end larger than the other end, so that a second step is formed on each of the two side walls of the splicing portion in the width direction, and the large end of the splicing portion is connected to the component body. When two lightweight structural components are spliced, a second groove is formed between the two second steps. The second groove is used to set the splicing structural layer, and the first groove is used to set the compensating shrinkage structural layer.

[0029] Further preferably, the height of the second step is smaller than the height of the first step.

[0030] In a preferred embodiment, a convex strip is provided on each of the two side walls of the splicing portion in the width direction, and when two lightweight structural components are spliced ​​together, a splicing structural layer is provided between the two convex strips.

[0031] Further preferably, the thickness of the convex strip is smaller than the height of the first step.

[0032] The method for splicing the above-mentioned lightweight structural components comprises the following steps:

[0033] S1. Fix two lightweight structural members so that the joint surfaces of the two joint parts abut against each other;

[0034] S2, applying a splicing material to the bottom of the first groove to form a splicing structural layer, the splicing structural layer can completely cover both ends of the gap in the width direction of the joint, and the splicing structural layer has a spacing between the two first steps at both ends in the length direction, and the thickness of the splicing structural layer is less than the height of the first step, and standing still; making the surface of the splicing structural layer lose moisture;

[0035] S3, applying a shrinkage compensating material in the first groove to form a shrinkage compensating structural layer.

[0036] In a preferred embodiment, in step S2, a detachable protective tape is firstly provided on one side of the bottom of the first groove close to the first step, and then a splicing material is applied to the bottom of the first groove to form a splicing structural layer, and then after removing the protective tape, a compensating shrinkage material is applied to form a compensating shrinkage structural layer;

[0037] The protective tape is used to cover the bottom area of ​​the first groove except the area where the splicing material needs to be applied;

[0038] When the side wall of the splicing portion in the width direction is provided with a second step or a convex strip, it is not necessary to provide a protective belt when performing step S2.

[0039] In a preferred embodiment, the protective tape comprises adhesive tape or adhesive plaster.

[0040] In a preferred embodiment, the splicing material is made of a material that can be used as a structural layer of a seam and a shrinkage compensating structural layer.

[0041] A spliced ​​component is formed by splicing at least two of the above-mentioned lightweight structural components. A splicing structural layer is arranged at the splicing seam in the width direction of the splicing part. The splicing structural layer can completely cover the two ends of the gap in the width direction, that is, the splicing structural layer can completely cover the gap at the joint, and the splicing structural layer has a spacing between the two first steps at both ends of its length direction, and the thickness of the splicing structural layer is less than the height of the first step; a compensating shrinkage structural layer is arranged on the outside of the splicing structural layer in the first groove.

[0042] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0043] 1. The present invention improves the structure of the existing prefabricated board so that the end face of the splicing part away from the component body is a plane. The plane serves as the splicing surface of the lightweight structural component, which can realize the convex-convex splicing of two lightweight structural components. During the splicing process, the splicing material is used to close the gap at the joint. The splicing material can not only prevent the compensating shrinkage material from being completely and directly bonded to the joint of the lightweight structural component, but also prevent the compensating shrinkage material from flowing into the gap of the joint of the lightweight structural component, and the splicing material can serve as a joint and compensating shrinkage material structural layer; the compensating shrinkage material is protected to continuously offset and compensate for the shrinkage of the lightweight structural component, thereby solving the problem of cracks in the joint of the lightweight structural component caused by the existing convex-concave splicing method.

[0044] 2. The present invention can avoid contamination of other areas at the bottom of the first groove by the splicing material by setting a second step or convex strip on the side wall in the width direction of the splicing part, and can also avoid setting a protective belt for protection, that is, the splicing material can be applied without anti-pollution protection, and the construction is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0046] Figure 1 It is a schematic diagram of the existing convex and concave splicing;

[0047] Figure 2 This is a schematic diagram of two lightweight structural members in Example 1 of the present invention being aligned and fixed before being spliced;

[0048] Figure 3 This is a schematic diagram of providing a protective belt after two lightweight structural members are aligned and fixed according to Example 1 of the present invention;

[0049] Figure 4 This is a schematic diagram of applying a splicing material at the joints of two lightweight structural members according to Example 1 of the present invention;

[0050] Figure 5 This is a schematic diagram of two lightweight structural members of Example 1 of the present invention being spliced ​​after shrinkage compensation material is applied to the joints;

[0051] Figure 6 This is a schematic diagram of two lightweight structural members in Example 4 of the present invention being aligned and fixed before being spliced;

[0052] Figure 7 A schematic diagram of applying a splicing material at the joints of two lightweight structural members according to Example 4 of the present invention;

[0053] Figure 8 This is a schematic diagram of two lightweight structural members of Example 4 of the present invention being spliced ​​after shrinkage compensation material is applied to the joints;

[0054] Fig. 9 This is a schematic diagram of two lightweight structural members of Example 5 of the present invention being aligned and fixed before being spliced;

[0055] Fig.10 A schematic diagram of applying a splicing material at the joints of two lightweight structural members according to Example 5 of the present invention;

[0056] Fig.11 This is a schematic diagram of two lightweight structural members of Example 5 of the present invention being spliced ​​after shrinkage compensation material is applied to the joints;

[0057] Fig.12 This is a schematic structural diagram of a spliced ​​lightweight structural component according to Example 6 of the present invention.

[0058] Marks and corresponding parts names in the attached drawings:

[0059] 1-component body; 2-joining part; 3-first step; 4-joining structural layer; 5-shrinkage compensation structural layer; 6-second step; 7-convex strip; 10-first groove; 20-second groove; 100-lightweight structural component; 200-gap; 300-protective belt. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. The schematic implementation mode of the present invention and its description are only used to explain the present invention and are not intended to limit the present invention. The embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0061] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those of ordinary skill in the art that these specific details do not have to be employed to practice the present invention. In other embodiments, in order to avoid confusing the present invention, known structures, materials or methods are not specifically described. The materials, instruments and reagents used in the following examples, unless otherwise specified, can be obtained from commercial sources. The technical means used in the examples, unless otherwise specified, are conventional means well known to those skilled in the art.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0063] Embodiment 1:

[0064] like Figure 2-Figure 5 As shown, a lightweight structural member for construction includes a member body 1, one end of the member body 1 for splicing protrudes outward to form a splicing portion 2, the width of the splicing portion 2 is smaller than the width of the member body 1, so that the ends of the member body 1 form a first step 3 on both sides of the splicing portion 2 in the width direction; the end surface of the splicing portion 2 away from the member body 1 is a plane, and the plane serves as the splicing surface of the lightweight structural member 100;

[0065] When two lightweight structural members 100 are spliced ​​together, the corresponding splicing surfaces of the two lightweight structural members 100 abut against each other, so that the two splicing parts 2 form a first groove 10 on both sides of the width direction thereof. The first groove 10 is a U-shaped groove, and the two side walls of the U-shaped groove are two first steps 3 symmetrically arranged with a gap 200. The first groove 10 is used to set a splicing structural layer 4 and a compensating shrinkage structural layer 5. The splicing structural layer 4 is used to cover the gap 200 between the two splicing parts 2, and the compensating shrinkage structural layer 5 is used to fill the remaining space in the first groove 10.

[0066] In this embodiment, the width direction refers to Figure 2The vertical direction in is also the height direction of the first step 3, and the length is Figure 2 Horizontal direction in .

[0067] In this embodiment, the length of the splicing structural layer 4 arranged in the first groove 10 is smaller than the spacing between the two side walls of the first groove 10, that is, it can be understood that the splicing structural layer 4 can completely cover the two ends of the gap 200 in the width direction, that is, the splicing structural layer 4 can completely cover the gap 200 at the joint, but does not completely cover the bottom of the first groove 10. The two ends of the splicing structural layer 4 in the length direction are respectively spaced a certain distance from the two side walls of the first groove 10, and the top and bottom of the splicing structural layer 4 are flush with the top and bottom of the splicing part 2, and the top and bottom are used as a reference relative to the parts used to support the lightweight structural member 100.

[0068] In a specific case, the length of the joint portion 2 is 20 mm, the height of the first step 3 is 3 mm, that is, the depth of the first groove 10 is 3 mm.

[0069] The lightweight structural member 100 of this embodiment can be used as a lightweight interior wall partition, and the lightweight interior wall partition can be made of lightweight concrete.

[0070] The lightweight structural member 100 of this embodiment can be used as a thinner member for building a house. A thinner member is equivalent to a thinner lightweight interior wall. That is, the lightweight structural member 100 of this embodiment can be designed with a corresponding thickness according to the actual application scenario.

[0071] The method for splicing the lightweight structural member 100 of this embodiment includes the following steps:

[0072] S1, such as Figure 2 , Figure 3 As shown, two lightweight structural members 100 are stably fixed on a plane so that the joint surfaces of the two joint parts 2 abut against each other, and a gap 200 is formed between the two joint surfaces; Figure 3 As shown, the bottom of the first groove 10 away from the gap 200 is covered with a protective tape 300 to protect the bottom of the first groove 10 from being contaminated by the splicing material. The length of the covering is half of the length of the splicing portion 2. For example, when the length of the splicing portion 2 is 20 mm, the covering length is 10 mm. Each splicing portion 2 is reserved for smearing the splicing material. The protective tape 300 can be a tape or a plaster.

[0073] S2, such as Figure 4As shown, a splicing material is applied with a scraper at the bottom of the first groove 10 to form a splicing structural layer 4. The splicing structural layer 4 can completely cover the two ends of the gap 200 in the width direction, and the splicing structural layer 4 has a spacing between the two first steps 3 at both ends in the length direction. The thickness of the splicing structural layer 4 is less than the height of the first step 3. When the depth of the first groove 10 is 3mm, the thickness of the splicing structural layer 4 can be 1mm. After the splicing material is applied, it is left to stand for 30-60min. The specific placement time is relatively adjusted according to the humidity and temperature. When the surface of the splicing material can be seen to lose moisture with the naked eye, the placement time is up. If there is a little water on the surface and the surface is slightly dry, it does not affect the effect. In a specific case, the length of the splicing portion 2 is 20 mm, the height of the first step 3 is 3 mm, the length of the splicing structural layer 4 is 20 mm, and the thickness is 1 mm. The length of the splicing structural layer 4 is 10 mm on both sides of the gap 200 as the center line. The overall length of the first groove 10 is 40 mm, the width of the component body 1 is 100 mm, and the overall length of the overall specimen after splicing is 300 mm.

[0074] S3, such as Figure 5 As shown, when the surface of the splicing structural layer 4 loses moisture, the protective tape 300 is torn off, and the compensating shrinkage material is applied in the first groove 10 to form the compensating shrinkage structural layer 5, and the compensating shrinkage structural layer 5 is smoothed so that the compensating shrinkage structural layer 5 and the lightweight structural component 100 are on the same horizontal plane. At this time, both sides of the splicing structural layer 4 in the length direction and one side in the width direction are wrapped by the compensating shrinkage structural layer 5; it can be placed and protected until the compensating shrinkage material generates strength.

[0075] In this embodiment, the splicing material is a material that can be used as a structural layer of the splicing seam 200 and the shrinkage compensation structural layer 5. One specific formula of the splicing material is:

[0076] 40 parts of bentonite, 75 parts of stone powder, 10 parts of rubber powder, 0.1 parts of functional dispersant SDJK-BMS and 45 parts of water.

[0077] Among them, the formula of the functional dispersant SDJK-BMSJ is: 4 parts of dimethyldiallyl ammonium bromide, 150 parts of vinyl butoxy polyoxyethylene ether, 2 parts of 30% hydrogen peroxide, 3 parts of hypophosphorous acid and 310 parts of deionized water; among them, the weight average molecular weight of vinyl butoxy polyoxyethylene ether is 3000.

[0078] The preparation method of the functional dispersant SDJK-BMSJ comprises the following steps:

[0079] 1) Add 4 parts of dimethyldiallylammonium bromide and 10 parts of deionized water into a reaction vessel in sequence, and stir evenly to obtain material A;

[0080] 2) Add 300 parts of deionized water and 150 parts of vinyl butoxy polyoxyethylene ether to the reaction container in sequence, start stirring, stir for 30 minutes, start low-temperature circulation, control the reaction temperature to 10°C, add 2 parts of 30% hydrogen peroxide and 3 parts of hypophosphorous acid to the three-necked flask, stir for 5 minutes, start to add material A dropwise for 30 minutes with a constant flow pump, keep warm for 60 minutes, and the dispersant is prepared.

[0081] The splicing material preparation method comprises the following steps:

[0082] S1, adding 40 parts of bentonite, 75 parts of stone powder and 10 parts of rubber powder into 45 parts of deionized water, mixing to prepare a paste system;

[0083] S2: Add 0.1 parts of functional dispersant SDJK-BMSJ to the paste system prepared in step S1, stir and mix to obtain a splicing material.

[0084] The shrinkage compensating material is an existing technology, specifically: EC2000-polymer mortar produced by Beijing Aotaili New Technology Co., Ltd.

[0085] The effective lengths of the joint specimens and the concave-convex joint specimens prepared in this embodiment are shown in Table 1, and the strain resistance is shown in Table 2:

[0086] Table 1

[0087]

[0088] Table 2

[0089]

[0090] Note: The front and back sides in Table 1 and Table 2 refer to the seams on both sides of the splicing part 2 in the width direction.

[0091] The data in Table 2 above are obtained by testing the tensile force of the test piece prepared in Example 1 and the test piece prepared by the existing concave-convex splicing with reference to the part of the test method for tensile properties of plastics in GB1040. The tensile equipment used is a universal testing machine (Shenzhen Wanchuang Testing Equipment Co., Ltd., TSE305D, microcomputer-controlled electronic universal testing machine). The prepared test piece is placed in the upper and lower clamps of the universal testing machine, with a clamping distance of 400 mm, and the clamps are properly tightened to prevent the test piece from slipping or breaking at the clamps during the stretching process. The force direction of the test piece is consistent with the test force direction. The test piece is loaded at a speed of 0.1 mm / min, and the test piece is stretched to fracture, and the tensile force and tensile length of the fracture process are read.

[0092] Note: After preparation, the specimens need to be cured for 7 days at 20±5℃ and relative humidity of 50%-80%. If the temperature is too low, the curing time can be appropriately extended, but the curing time shall not exceed 14 days. Two specimens are prepared in each group and the results are averaged.

[0093] Note: The specimens prepared by concave-convex splicing are as follows Figure 1 As shown, the shrinkage compensating material is directly applied to the joints to form the shrinkage compensating structural layer 5.

[0094] In this embodiment, the structure of the lightweight structural component 100 is improved so that the end face of the splicing part 2 away from the component body 1 is a plane. The plane serves as the splicing surface of the lightweight structural component 100, which can realize the convex-convex splicing of two lightweight structural components 100. During the splicing process, the splicing material is used to close the gap 200 at the joint. The splicing material can prevent the compensating shrinkage material from being completely and directly bonded to the joint of the lightweight structural component, and can also prevent the compensating shrinkage material from flowing into the gap 200 at the joint of the lightweight structural component. The splicing material can serve as a structural layer of the joint and the compensating shrinkage material; the compensating shrinkage material is protected to continuously offset and compensate for the shrinkage of the lightweight structural component, thereby solving the problem of cracks in the joints of lightweight structural components caused by the existing convex-concave splicing method.

[0095] Furthermore, the splicing structural layer 4 of the present embodiment completely covers the gap 200 at the joint, but does not completely cover the bottom of the first groove 10, so that the later compensating shrinkage material has a certain direct contact with the joint (i.e., the first groove 10), but it is not a safe contact (because the gap 200 is coated with splicing material to form the splicing structural layer 4). At this time, a part of the compensating shrinkage structural layer 5 is in direct contact with the outer side of the joint of the lightweight structural member close to the edge by about 10 mm, and a part is in contact with the splicing structural layer 4 acting as a structural layer, which can make the compensating shrinkage material less susceptible to the stress of the splicing seam or processing problems that may cause cracks or fissures in the compensating shrinkage material, thereby ensuring and improving the life and function of the compensating shrinkage material.

[0096] Embodiment 2:

[0097] This embodiment is based on Embodiment 1, and the difference from Embodiment 1 is that the formula of the splicing material is different. The specific formula of the splicing material in this embodiment is:

[0098] 35 parts of bentonite, 70 parts of stone powder, 8 parts of rubber powder, 0.1 parts of functional dispersant SDJK-BMS and 34 parts of water.

[0099] Embodiment 3:

[0100] This embodiment is based on Embodiment 1, and the difference from Embodiment 1 is that the formula of the splicing material is different. The specific formula of the splicing material in this embodiment is:

[0101] 20 parts of expander, 60 parts of stone powder, 6 parts of rubber powder, 0.1 parts of functional dispersant SDJK-BMS and 26 parts of water.

[0102] The effective lengths of the joint specimens prepared in Example 2 and Example 3 are shown in Table 3, and the strain resistance is shown in Table 4:

[0103] Table 3

[0104]

[0105] Table 4

[0106]

[0107] Embodiment 4:

[0108] like Figure 6-Figure 8 As shown, this embodiment is based on any one of Embodiments 1-3, and the difference between the structures of Embodiments 1-3 is that:

[0109] The splicing portion 2 is a structure with one end larger than the other end, so that a second step 6 is formed on each of the two side walls of the splicing portion 2 in the width direction. The large end of the splicing portion 2 is connected to the component body 1. When two lightweight structural components 100 are spliced, a second groove 20 is formed between the two second steps 6. The second groove 20 is used to set the splicing structural layer 4, and the first groove 10 is used to set the compensating shrinkage structural layer 5.

[0110] Preferably, the height of the second step 6 is smaller than the height of the first step 3 .

[0111] In a specific case, the length of the splicing portion 2 is 20 mm, the height of the first step 3 is 2 mm, that is, the depth of the first groove is 2 mm, the height of the second step 6 is 1 mm, that is, the depth of the second groove 20 is 1 mm, and the width between the two side walls of the second groove 20 is 20 mm, that is, the splicing structural layer 4 is 10 mm long on both sides of the gap 200 as the center line.

[0112] The splicing method of this embodiment includes the following steps:

[0113] S1, such as Figure 6 As shown, two lightweight structural members 100 are stably fixed on a plane, so that the joint surfaces of the two joint parts 2 abut against each other, and a gap 200 is formed between the two joint surfaces.

[0114] S2, such as Figure 7As shown, a splicing material is applied with a scraper in the second groove 20 to form a splicing structural layer 4, which can completely cover both ends of the gap 200 in the width direction, and the splicing structural layer 4 completely fills the second groove 20, and is left standing for 30-60 minutes; the specific placement time is relatively adjusted according to the humidity and temperature, and the placement time is up when the surface of the splicing material can be seen to lose moisture with the naked eye. If there is a little water on the surface and the surface is slightly dry, it does not affect the effect.

[0115] S3, such as Figure 8 As shown, when the surface of the splicing structural layer 4 loses moisture, a compensating shrinkage material is applied in the first groove 10 to form a compensating shrinkage structural layer 5, the compensating shrinkage structural layer 5 fills the first groove 10, and the compensating shrinkage structural layer 5 is smoothed so that the compensating shrinkage structural layer 5 and the lightweight structural member 100 are on the same horizontal plane; the compensating shrinkage structural layer 5 is placed and protected until the compensating shrinkage material generates strength.

[0116] Embodiment 5:

[0117] like Figure 9-11 As shown, this embodiment is based on any one of Embodiments 1-3, and the structural difference between this embodiment and Embodiments 1-3 is that:

[0118] The splicing portion 2 is provided with a convex strip 7 on each of the two side walls in the width direction. When two lightweight structural members 100 are spliced, a splicing structural layer 4 is provided between the two convex strips 7 ; there is a spacing between the convex strip 7 and the first step 3 .

[0119] Preferably, the thickness of the convex strip 7 is smaller than the height of the first step 3 .

[0120] The splicing method of this embodiment includes the following steps:

[0121] S1, such as Fig. 9 As shown, two lightweight structural members 100 are stably fixed on a plane, so that the joint surfaces of the two joint parts 2 abut against each other, and a gap 200 is formed between the two joint surfaces.

[0122] S2, such as Fig.10 As shown, a splicing material is applied with a scraper between the two convex strips 7 at the bottom of the first groove 10 to form a splicing structural layer 4. The splicing structural layer 4 can completely cover both ends of the gap 200 in the width direction, and the side walls of the splicing structural layer 4 in the width direction are flush with the convex strips 7. Let it stand for 30-60 minutes. The specific placement time is relatively adjusted according to the humidity and temperature. When the surface of the splicing material can be seen to lose moisture with the naked eye, the placement time is up. If there is a little water on the surface and the surface is slightly dry, it will not affect the effect.

[0123] S3, such as Fig.11As shown, when the surface of the splicing structural layer 4 loses moisture, a compensating shrinkage material is applied in the first groove 10 to form a compensating shrinkage structural layer 5, the compensating shrinkage structural layer 5 fills the first groove 10, and the compensating shrinkage structural layer 5 is smoothed so that the compensating shrinkage structural layer 5 and the lightweight structural member 100 are on the same horizontal plane; the compensating shrinkage structural layer 5 is placed and protected until the compensating shrinkage material generates strength.

[0124] Embodiment 6:

[0125] like Fig.12 As shown, a spliced ​​wall is formed by splicing at least two lightweight structural members 100 as in Example 1, or by splicing at least two lightweight structural members 100 as in Example 2, or by splicing at least two lightweight structural members 100 as in Example 3, a splicing structural layer 4 is provided at the joint in the width direction of the splicing portion 2, the splicing structural layer 4 can completely cover both ends of the gap 200 at the joint in the width direction, and the splicing structural layer 4 has a spacing between the two first steps 3 at both ends in the length direction, and the thickness of the splicing structural layer 4 is less than the height of the first step 3; a compensating shrinkage structural layer 5 is provided outside the splicing structural layer 4 in the first groove 10. The thickness of the splicing structural layer 4 is relative to the width direction of the splicing portion 2.

[0126] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0127] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

Claims

1. A lightweight structural member for construction, comprising a member body (1), characterized in that: One end of the component body (1) used for splicing protrudes outward to form a splicing portion (2); the width of the splicing portion (2) is smaller than the width of the component body (1), so that the end of the component body (1) forms a first step (3) on both sides of the splicing portion (2) in the width direction; an end surface of the splicing portion (2) away from the component body (1) is a plane, and the plane serves as a splicing surface of the lightweight structural component (100); When two lightweight structural components (100) are spliced ​​together, the corresponding splicing surfaces of the two lightweight structural components (100) abut against each other, so that the two splicing parts (2) each form a first groove (10) on both sides in the width direction thereof, the first groove (10) being used to arrange a splicing structural layer (4) and a compensating shrinkage structural layer (5), the splicing structural layer (4) being used to cover the gap (200) between the two splicing parts (2), and the compensating shrinkage structural layer (5) being used to fill the remaining space in the first groove (10); The splicing structural layer (4) has a spacing between the two first steps (3) at both ends in the length direction; The splicing structural layer (4) can serve as a structural layer between the seam and the shrinkage compensating structural layer (5); The splicing material used in the splicing structural layer (4) comprises the following components in parts by weight: 20-40 parts of inorganic gel thickener, 60-80 parts of stone powder, 2-10 parts of tackifier, 0.01-0.1 parts of dispersant and 30-50 parts of water; The weight ratio of the inorganic gel thickener to the powder in the splicing material is 15-40%; the powder is the sum of the inorganic gel thickener, stone powder and tackifier; The dispersant is a functional dispersant SDJK-BMSJ; the preparation method of the functional dispersant SDJK-BMSJ comprises the following steps: 1) Add 4 parts of dimethyldiallylammonium bromide and 10 parts of deionized water into a reaction vessel in sequence, and stir evenly to obtain material A; 2) Add 300 parts of deionized water and 150 parts of vinyl butoxy polyoxyethylene ether to the reaction container in sequence, start stirring, stir for 30 minutes, start low temperature circulation, control the reaction temperature to 10°C, add 2 parts of 30% hydrogen peroxide and 3 parts of hypophosphorous acid to the three-necked flask, stir for 5 minutes, start to add material A dropwise for 30 minutes with a constant flow pump, keep warm for 60 minutes, and the dispersant is prepared; The shrinkage compensating material used in the shrinkage compensating structural layer (5) is EC2000-polymer mortar.

2. A lightweight structural member for construction according to claim 1, characterized in that: The splicing portion (2) is a structure with one end larger than the other end, so that the splicing portion (2) forms a second step (6) on each of the two side walls in the width direction thereof, the large end of the splicing portion (2) is connected to the component body (1), and when two pieces of the lightweight structural components (100) are spliced, a second groove (20) is formed between the two second steps (6), the second groove (20) being used to arrange the splicing structural layer (4), and the first groove (10) being used to arrange the shrinkage compensation structural layer (5).

3. A lightweight structural member for construction according to claim 2, characterized in that: The height of the second step (6) is smaller than the height of the first step (3).

4. A lightweight structural member for construction according to claim 1, characterized in that: The splicing portion (2) is provided with a convex strip (7) on each of the two side walls in the width direction thereof, and when two lightweight structural components (100) are spliced ​​together, the splicing structural layer (4) is provided between the two convex strips (7).

5. A lightweight structural member for construction according to claim 4, characterized in that: The thickness of the convex strip (7) is smaller than the height of the first step (3).

6. The method for splicing lightweight structural members according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, fixing the two lightweight structural components (100) so that the joint surfaces of the two joint portions (2) abut against each other; S2, applying a splicing material to the bottom of the first groove (10) to form the splicing structural layer (4), wherein the splicing structural layer (4) can completely cover both ends of the gap (200) in the width direction, and there is a distance between the two ends of the splicing structural layer (4) and the two first steps (3) in the length direction, and the thickness of the splicing structural layer (4) is less than the height of the first step (3), and the splicing structural layer (4) is left to stand; and the surface of the splicing structural layer (4) loses moisture; S3. Applying a shrinkage compensating material in the first groove (10) to form the shrinkage compensating structural layer (5).

7. The splicing method according to claim 6, characterized in that: In step S2, a detachable protective tape (300) is firstly provided on a side of the bottom of the first groove (10) close to the first step (3), and then the splicing material is applied to the bottom of the first groove (10) to form the splicing structural layer (4). After the protective tape (300) is removed, the shrinkage compensating material is applied to form the shrinkage compensating structural layer (5). The protective tape (300) is used to cover the area of ​​the bottom of the first groove (10) other than the area where the splicing material needs to be applied; When the side wall of the splicing portion (2) in the width direction is provided with a second step (6) or a convex strip (7), it is not necessary to provide the protective belt (300) when performing step S2.

8. The splicing method according to claim 7, characterized in that: The protective tape (300) comprises adhesive tape or adhesive plaster.

9. The splicing method according to claim 6, characterized in that: The splicing material is a material that can be used as a structural layer for the splicing seam and the shrinkage compensating structural layer (5).

10. A spliced ​​component, characterized in that: The method is formed by splicing at least two lightweight structural components (100) as claimed in claim 1, or by splicing at least two lightweight structural components (100) as claimed in claim 2 or 3; or by splicing at least two lightweight structural components (100) as claimed in claim 4 or 5; the splicing structural layer (4) is arranged at the splicing seam in the width direction of the splicing portion (2), the splicing structural layer (4) can completely cover the two ends of the gap (200) in the width direction, and the splicing structural layer (4) has a spacing between the two first steps (3) at both ends in the length direction, and the thickness of the splicing structural layer (4) is less than the height of the first step (3); the compensating shrinkage structural layer (5) is arranged on the outside of the splicing structural layer (4) in the first groove (10).

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