High-strength light-weight thermal insulation mortar based on synergistic activation of bulk solid wastes and preparation method of high-strength light-weight thermal insulation mortar

Abstract

The invention provides high-strength light-weight thermal insulation mortar based on synergistic activation of bulk solid waste and a preparation method thereof.The preparation method comprises the steps that carbide slag, fly ash and a composite exciting agent are mixed and subjected to ball milling treatment, so that the volcanic ash reaction activity of Ca (OH) 2 in the carbide slag mixed material and the fly ash mixed material is activated, and pretreated powder is obtained; uniformly mixing the mixed material pretreatment powder with cement, cellulose ether, latex powder and glass beads to obtain a mixed material; adding water into the mixed material, and stirring to form mixed material thermal insulation mortar; through synergistic activation of the composite activator, the total mixing amount of solid waste is greater than or equal to 55%, and the mortar is free of cracking after being formed. The carbide slag, the fly ash and the composite activator are subjected to ball milling together, so that the composite activator fully activates the volcanic ash activity of the fly ash, a large amount of C-S-H gel is generated, and the multi-graded vitrified microbeads are matched, so that the mortar keeps the light condition under the dry density, still has good compressive strength and low heat conductivity coefficient, and realizes the synergy of high strength and light heat preservation.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste and its preparation method. Background Technology

[0002] With increasingly stringent requirements for building energy conservation, thermal insulation mortar, as an important component of building insulation materials, is experiencing growing market demand. However, traditional thermal insulation mortar mainly relies on cement as a binder, which consumes a large amount of natural resources during production, resulting in high costs. Furthermore, cement production leads to the emission of large amounts of greenhouse gases such as carbon dioxide, placing a heavy burden on the environment.

[0003] At the same time, the stockpiling and disposal of industrial bulk solid waste (such as calcium carbide slag and fly ash) has become a major problem in the field of environmental protection. As a by-product of the calcium carbide method for producing acetylene, calcium carbide slag has an annual emission of more than 10 million tons. Its free CaO content is high, and direct use is prone to volume stability problems due to hydration expansion. Although fly ash has pozzolanic activity, its natural activity is low. If it is not effectively activated, it is easy to cause the strength of thermal insulation mortar to deteriorate. Summary of the Invention

[0004] To address the aforementioned problems in existing technologies, this invention provides a high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste and its preparation method, thereby obtaining thermal insulation mortar with a high solid waste content (greater than or equal to 50%) while meeting the performance requirements of building insulation materials, effectively enhancing the residual value of industrial bulk solid waste.

[0005] The specific details of the invention are as follows: In a first aspect, the present invention provides a method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste, the method comprising: Carbide slag, fly ash, and composite activator are mixed and ball-milled to activate the pozzolanic reactivity of Ca(OH)2 in the carbide slag and fly ash, thereby obtaining pretreated powder. The pretreated powder is mixed evenly with cement, cellulose ether, latex powder and vitrified microspheres to obtain a mixture. Water is added to the mixture, and after stirring, the thermal insulation mortar is formed. Calculated by mass ratio, the mixture contains 30-50% carbide slag, 20-35% fly ash, 15-25% vitrified microspheres, 0.5-2% composite activator, 5-15% cement, 0.1-0.3% cellulose ether, and 0.5-1.5% latex powder.

[0006] Optionally, the average specific surface area of ​​the pretreated powder is ≥400 m² / kg.

[0007] Optionally, the composite activator is a mixture of Na2SO4 and Na2SiO3, wherein the mass ratio of Na2SO4 to Na2SiO3 is 2:1.

[0008] Optionally, the mass percentage of free CaO in the carbide slag is ≤1.5%.

[0009] Optionally, the vitrified microspheres are obtained by premixing vitrified microspheres with different gradation ratios, and the bulk density is ≤80kg / m³. 3 The gradation ratio is: 30% for 40-50 mesh, 50% for 60-70 mesh, and 20% for 80-90 mesh.

[0010] Optionally, the step of uniformly mixing the pretreated powder with cement, cellulose ether, latex powder and vitrified microspheres to obtain a mixture includes: first, dry mixing the pretreated powder with cement until uniform; then, adding the cellulose ether and latex powder and continuing to stir until uniform; and finally, adding the vitrified microspheres in multiple batches and stirring until uniformly dispersed.

[0011] Optionally, the cellulose ether is selected from at least one of methylcellulose (MC), hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC), and carboxymethyl cellulose (CMC); The latex powder comprises: ethylene-vinyl acetate copolymer, acrylate copolymer or styrene-butadiene rubber.

[0012] Optionally, the mass ratio of water to the mixture in the thermal insulation mortar is 0.5-0.6.

[0013] Secondly, the present invention provides a high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste, wherein the thermal insulation mortar is obtained by the preparation method described in the first aspect above.

[0014] Optionally, the mortar has a flowability of 160±5 mm and a dry density of 310-340 kg / m³. 3 ; After the mortar is molded and cured to the target age, the thermal conductivity of the resulting insulating brick is 0.075-0.082 W / (m·K).

[0015] Compared with the prior art, the present invention has the following advantages: This invention provides a method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste. The method includes: mixing carbide slag, fly ash, and a composite activator, and then ball milling the mixture to activate the pozzolanic reaction activity between Ca(OH)2 in the carbide slag and the fly ash, thereby obtaining a pretreated powder; uniformly mixing the pretreated powder with cement, cellulose ether, latex powder, and vitrified microspheres to obtain a mixture; adding water to the mixture and stirring to form the thermal insulation mortar; and, by mass ratio, the mixture contains (30-50)% carbide slag, (20-35)% fly ash, (15-25)% vitrified microspheres, (0.5-2)% composite activator, (5-15)% cement, (0.1-0.3)% cellulose ether, and (0.5-1.5)% latex powder. The preparation method provided by this invention, through the synergistic activation of composite activators, can achieve a total solid waste content of ≥55% in thermal insulation mortar, reduce production costs and reduce solid waste storage pollution; at the same time, it improves the utilization rate of fly ash activity, taking into account both the lightweight characteristics and high strength performance of the mortar. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart of the preparation method of high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste provided in an embodiment of the present invention is shown. Figure 2 This invention illustrates an insulation block material made from the insulation mortar provided in an embodiment of the invention; Figure 3 The thermal conductivity of the thermal insulation block material made from the thermal insulation mortar provided in the embodiments of the present invention is shown. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention. Furthermore, all other embodiments obtained by those skilled in the art without inventive effort are within the protection scope of the present invention.

[0019] Specific experimental steps or conditions are not specified in the embodiments; they can be performed according to the conventional experimental steps or conditions described in the prior art. Reagents and other instruments used, unless otherwise specified, are all commercially available conventional reagent products. Furthermore, the accompanying drawings are merely illustrative diagrams of the embodiments of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore, repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0020] Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of this specification.

[0021] In the description of this invention, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0022] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Before providing a detailed description of the high-strength lightweight thermal insulation mortar based on the co-activation of bulk solid waste and its preparation method provided by this invention, it is necessary to explain the relevant technologies as follows: The emissions of bulk industrial solid wastes such as fly ash and calcium carbide slag are increasing year by year. Fly ash is a solid waste generated during the coal combustion process in thermal power plants, while calcium carbide slag is a byproduct of acetylene production. If these solid wastes are not effectively treated, they will accumulate over a long period of time, occupying a large amount of land resources and potentially releasing harmful substances, causing serious pollution to soil, water bodies, and air, threatening the ecological environment and human health.

[0024] In the field of thermal insulation mortar, vitrified microspheres are a commonly used thermal insulation aggregate with advantages such as light weight and thermal insulation. However, the synergistic effect mechanism between vitrified microspheres and solid waste has not yet been fully explored. Existing technologies have many shortcomings; the solid waste content is usually less than 30%, resulting in low resource utilization efficiency and a large amount of solid waste remaining unused. The calcium activity in carbide slag is not effectively activated, failing to fully realize its potential value. Furthermore, increasing the solid waste content often leads to a decrease in mortar strength, making it difficult to meet the performance requirements of building insulation materials.

[0025] Against this background, this invention studies a high-strength, lightweight thermal insulation mortar based on the co-activation of bulk solid waste and its preparation method. This not only effectively solves the problem of bulk industrial solid waste accumulation, realizes resource recycling, reduces dependence on natural resources, and reduces carbon emissions, but also overcomes the shortcomings of existing thermal insulation mortars, improves mortar performance, meets the demand of the building energy conservation market for high-performance thermal insulation materials, and promotes the sustainable development of the construction industry. Specific implementation methods are as follows: In a first aspect, the present invention provides a method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste. Figure 1 The following is a flowchart illustrating the preparation method of high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste provided in an embodiment of the present invention. Figure 1 As shown, the method includes: S1. Mix carbide slag, fly ash and composite activator, and ball mill them to activate the pozzolanic reaction activity of Ca(OH)2 in the carbide slag and fly ash to obtain pretreated powder.

[0026] In this step, given that carbide slag, fly ash, and the composite activator have similar components and hardness (Mohs hardness 3-5), the grinding media (steel balls / ceramic balls) can precisely target the solid waste particles during ball milling, activating the pozzolanic reaction between Ca(OH)2 in the carbide slag and fly ash. Specifically, ball milling can fully destroy the glassy structure of fly ash, exposing active sites (SiO2, Al2O3). Since the main component of carbide slag, Ca(OH)2 crystals, has a layered structure, the impact and shear forces of ball milling will destroy the crystal layers. The ball milling process also increases the exposure of hydroxyl groups on the surface of Ca(OH)2 due to the interaction forces. These hydroxyl groups are the "chemical anchors" for the reaction with active SiO2 and Al2O3 in fly ash. The more hydroxyl groups there are, the higher the pozzolanic reactivity of Ca(OH)2 in carbide slag with fly ash. The ball milling process also disperses the composite activator (Na2SO4 / Na2SiO3) at the molecular level on the surface of solid waste, forming an "activator-solid waste" adsorption layer. After the addition of water, it can react quickly with Ca(OH)2 in carbide slag, greatly increasing the rate of CSH gel formation.

[0027] In this specific implementation step, before mixing the carbide slag with fly ash and the composite activator, it should be aged in the open air for ≥7 days to control the free CaO content ≤1.5%; the composite activator is selected from a mixture of Na2SO4 and Na2SiO3, wherein the mass ratio of Na2SO4 to Na2SiO3 is 2:1; in the specific implementation step, after mixing the carbide slag, fly ash and composite activator, it is ball-milled for 10-15 minutes, and the ball milling fineness is controlled to have a specific surface area ≥400 m² / kg.

[0028] S2. The pretreated powder is mixed evenly with cement, cellulose ether, latex powder and vitrified microspheres to obtain a mixture.

[0029] In this step, the proportions of the mixed materials are calculated by mass: carbide slag accounts for 30-50%, fly ash accounts for 20-35%, vitrified microspheres account for 15-25%, composite activator accounts for 0.5-2%, cement accounts for 5-15%, cellulose ether accounts for 0.1-0.3%, and latex powder accounts for 0.5-1.5%.

[0030] In this step, the pretreated powder and cement can be dry-mixed evenly for 1-2 minutes. Then, cellulose ether and latex powder can be added and stirred for about 2 minutes until evenly mixed. Finally, vitrified microspheres can be added in multiple batches (to avoid breaking the vitrified microspheres due to single addition, which would affect the lightweight properties). Stir until evenly dispersed. Specifically, vitrified microspheres can be added in two batches and stirred at low speed (≤200 rpm) until evenly dispersed.

[0031] In this step, the vitrified microspheres used are obtained by premixing vitrified microspheres with different gradations. Through the gradient matching of particle sizes, the vitrified microspheres in the mortar simultaneously perform the triple functions of a lightweight skeleton, thermal insulation barrier, and structural support. Compared with a single particle size (such as using only 60-70 mesh), this can fundamentally avoid problems such as excessive voids, uneven packing, and insufficient strength. The gradation ratio is: 30% 40-50 mesh, 50% 60-70 mesh, and 20% 80-90 mesh. In this mortar, coarse particles (40-50 mesh, 30%) form the "core skeleton," creating a large, loose framework that provides a lightweight foundation and prevents excessive density buildup caused by fine particles. Medium particles (60-70 mesh, 50%) fill the primary voids (approximately 100-200 μm) between the coarse particles, reducing the packing porosity from 45% for a single coarse particle to below 30%. Fine particles (80-90 mesh, 20%) further fill the secondary voids (approximately 50-100 μm) between the medium and coarse particles, ultimately stabilizing the overall packing density at 75-80 kg / m³. 3 This ensures that the dry density of the mortar meets the requirements for use, while also avoiding waste of cementitious materials.

[0032] In this specific implementation step, the cellulose ether used can be selected from at least one of methylcellulose (MC), hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC), and carboxymethyl cellulose (CMC); the composition of the latex powder used includes: ethylene-vinyl acetate copolymer (EVA), acrylate copolymer, or styrene-butadiene rubber (SBR).

[0033] S3. Add water to the mixture and stir to form the thermal insulation mortar.

[0034] In this step, water and the mixture are mixed at a mass ratio of 0.5-0.6 to form a thermal insulation mortar with a fluidity of 160±5mm.

[0035] The preparation method provided by this invention requires no special equipment; the ball milling, mixing, and stirring steps are all conventional processes in the building materials industry, facilitating large-scale production. This invention avoids volume expansion caused by delayed hydration of free CaO in the calcium carbide slag by controlling the free CaO content to ≤1.5%, combined with the synergistic effect of the composite activator, resulting in no cracking after mortar molding. The co-ball milling of calcium carbide slag, fly ash, and the composite activator fully activates the pozzolanic activity of the fly ash, generating a large amount of CSH gel. Combined with multi-graded vitrified microspheres, this maintains the mortar's dry density at 310-340 kg / m³. 3 Under lightweight conditions, it still possesses a compressive strength of ≥1.0 MPa and a low thermal conductivity of 0.075-0.082 W / (m・K), achieving a synergy between high strength and lightweight insulation. It should also be emphasized that in the insulation mortar prepared in the embodiments of the present invention, the total amount of solid waste is the sum of carbide slag and fly ash, with a mass ratio of 50-85%, which is much higher than that of the prior art, significantly reducing solid waste storage pollution, while reducing cement usage and lowering production costs.

[0036] Secondly, the present invention provides a high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste, wherein the thermal insulation mortar is obtained by the preparation method described in the first aspect above.

[0037] To enable those skilled in the art to better understand the present invention, the following embodiments are provided to illustrate in detail the high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste and its preparation method.

[0038] Example 1 Take 500g of carbide slag and age it in the open air for 7 days, controlling the free CaO content to 1.5%; weigh the following by mass percentage: 300g of carbide slag, 120g of fly ash, 90g of vitrified microspheres, 3g of composite activator (Na2SO4:Na2SiO3=2:1), 90g of cement, 0.6g of cellulose ether, and 3g of latex powder; The weighed carbide slag, fly ash, and composite activator were ball-milled together for 15 minutes to obtain a pretreated powder. This activated the pozzolanic reaction activity between Ca(OH)2 in the carbide slag and fly ash. The ball-milling fineness was controlled to have a specific surface area ≥ 400 m². 2 / kg; Vitrified microspheres were premixed in a gradation ratio of 30% 40 mesh, 50% 60 mesh, and 20% 80 mesh to form a bulk density of 80 kg / m³. 3 Lightweight aggregate system; First, dry mix the pretreated powder with cement for 1-2 minutes; add cellulose ether and latex powder and continue stirring for 2 minutes; add the lightweight aggregate system in two batches and stir at low speed (200 rpm) until evenly dispersed; finally, gradually add water to adjust the water-cement ratio to 0.6, and stir for 3 minutes at high speed of 800 rpm to control the fluidity of the fresh mortar to 160±5 mm.

[0039] After the mortar is cast into molds, it is cured for 24 hours at 20±2℃ and RH≥95% before demolding; standard curing (20℃, RH>90%) is then carried out until the target age.

[0040] Figure 2 This illustrates an insulation block material made from the insulation mortar provided in an embodiment of the present invention; such as Figure 2 As shown, the insulation block material obtained after standard curing has no cracking problems.

[0041] Example 2 Take 500g of carbide slag and age it in the open air for 9 days, controlling the free CaO content to 0.5%; weigh the following by mass percentage: 350g of carbide slag, 160g of fly ash, 200g of vitrified microspheres, 4g of composite activator (Na2SO4:Na2SiO3=2:1), 80g of cement, 2g of cellulose ether, and 4g of latex powder. Carbide slag, fly ash, and a composite activator were ball-milled together for 12 minutes to activate the pozzolanic reaction activity between Ca(OH)2 in the carbide slag and fly ash, forming a pretreated powder. The ball milling fineness was controlled to have a specific surface area ≥ 400 m². 2 / kg; Vitrified microspheres were premixed in a gradation ratio of 30% 40 mesh, 50% 60 mesh, and 20% 80 mesh to form a bulk density of 78 kg / m³. 3 Lightweight aggregate system; First, dry mix the pretreated powder with cement for 1-2 minutes; add cellulose ether and latex powder and continue stirring for 2 minutes; add the lightweight aggregate system in two batches and stir at low speed (100 rpm) until evenly dispersed; finally, gradually add water to adjust the water-cement ratio to 0.6, and stir for 3 minutes at high speed of 800 rpm to control the flowability of the fresh mortar to 160±5 mm.

[0042] After the mortar is cast into molds, it is cured for 24 hours at 20±2℃ and RH≥95% before demolding; standard curing (20℃, RH>90%) is then carried out until the target age.

[0043] Performance testing The thermal conductivity of the thermal insulation block materials prepared in Examples 1 and 2 was measured. Figure 3 The thermal conductivity of the thermal insulation block material made of the thermal insulation mortar provided in the embodiments of the present invention is shown, such as... Figure 3 As shown, the thermal conductivity of the thermal insulation block material made of thermal insulation mortar provided in the embodiments of the present invention is 0.075-0.082 W / (m·K), which meets the requirements for the thermal conductivity of thermal insulation materials in building energy-saving materials.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0045] For the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps can be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and components involved are not necessarily essential to the present invention.

[0046] The above provides a detailed description of a high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste and its preparation method. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste, characterized in that, The method includes: Carbide slag, fly ash, and composite activator are mixed and ball-milled to activate the pozzolanic reactivity of Ca(OH)2 in the carbide slag and fly ash, thereby obtaining pretreated powder. The pretreated powder is mixed evenly with cement, cellulose ether, latex powder and vitrified microspheres to obtain a mixture. Water is added to the mixture, and after stirring, the thermal insulation mortar is formed. Calculated by mass ratio, the mixture contains 30-50% carbide slag, 20-35% fly ash, 15-25% vitrified microspheres, 0.5-2% composite activator, 5-15% cement, 0.1-0.3% cellulose ether, and 0.5-1.5% latex powder.

2. The method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste according to claim 1, characterized in that, The average specific surface area of ​​the pretreated powder is ≥400 m² / kg.

3. The method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste according to claim 1, characterized in that, The composite activator is a mixture of Na2SO4 and Na2SiO3, with a mass ratio of Na2SO4 to Na2SiO3 of 2:

1.

4. The method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste according to claim 1, characterized in that, The mass percentage of free CaO in the carbide slag is ≤1.5%.

5. The method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste according to claim 1, characterized in that, The vitrified microspheres are obtained by premixing vitrified microspheres with different gradations and have a bulk density ≤80 kg / m³. 3 The gradation ratio is: 30% for 40-50 mesh, 50% for 60-70 mesh, and 20% for 80-90 mesh.

6. The method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste according to claim 1, characterized in that, The process of uniformly mixing the pretreated powder with cement, cellulose ether, latex powder and vitrified microspheres to obtain a mixture includes: first, dry mixing the pretreated powder with cement until uniform; then, adding the cellulose ether and latex powder and continuing to stir until uniform; and finally, adding the vitrified microspheres in multiple batches and stirring until uniformly dispersed.

7. The method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste according to claim 1 or 6, characterized in that, The cellulose ether is selected from at least one of methylcellulose, hydroxypropyl methylcellulose, hydroxyethylcellulose, and carboxymethylcellulose; The latex powder comprises: ethylene-vinyl acetate copolymer, acrylate copolymer or styrene-butadiene rubber.

8. The method for preparing high-strength lightweight thermal insulation mortar based on the synergistic activation of bulk solid waste according to claim 1, characterized in that, In the thermal insulation mortar, the mass ratio of water to the mixed materials is 0.5-0.

6.

9. A high-strength, lightweight thermal insulation mortar based on the co-activation of bulk solid waste, characterized in that, The thermal insulation mortar is obtained by any one of the preparation methods described in claims 1-8.

10. The high-strength lightweight thermal insulation mortar based on the co-activation of bulk solid waste according to claim 9, characterized in that, The mortar has a flowability of 160±5 mm and a dry density of 310-340 kg / m³. 3 ; After the mortar is molded and cured to the target age, the thermal conductivity of the resulting insulating brick is 0.075-0.082 W / (m·K).

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