Geopolymer cementing material prepared from diabase tailings and preparation method of geopolymer cementing material

Abstract

The invention discloses a diabase tailing geopolymer cementing material and a preparation method thereof, and belongs to the technical field of building materials. The diabase tailing geopolymer cementing material provided by the invention is prepared from the following components in parts by mass: 80 to 120 parts of diabase tailings, 10 to 20 parts of sodium hydroxide, 80 to 120 parts of water glass, 10 to 20 parts of aluminum hydroxide, 1 to 3 parts of a water reducing agent and 2 to 11 parts of a stabilizing material, the geopolymer cementing material is prepared from the solid waste diabase tailings, harmful solvents, heavy metals and radioactive substances are not added, waste can be turned into wealth, the preparation process is simple, the cost is low, the energy consumption is small, and an effective way is provided for comprehensive utilization of the diabase tailings.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building materials, and particularly relates to a diabase tailing geopolymer cementitious material and a preparation method thereof. BACKGROUND

[0002] As the basic raw material for the construction industry, the production and use of cementitious materials have a huge impact on global resource consumption and the environment. Traditional Portland cement is the most widely used cementitious material, but its production process consumes a large amount of limestone and clay and requires high-temperature calcination (about 1450℃), resulting in high energy consumption and large carbon dioxide emissions (about 0.8 tons of carbon dioxide are emitted per ton of cement produced). In addition, the brittle nature of cement-based materials limits their application in special engineering scenarios. Therefore, the development of low-carbon, environmentally friendly, and high-performance alternative cementitious materials has become an urgent need in the industry.

[0003] Geopolymer materials, as a new type of inorganic cementitious material, have attracted much attention due to their low carbon emissions, high durability, and excellent mechanical properties. Existing geopolymers mostly use fly ash, slag, and other industrial solid wastes as raw materials, and form a three-dimensional network structure through alkali activation. However, the source of such raw materials is limited by the regional distribution and production fluctuations of specific industrial by-products, and some raw materials (such as fly ash) have the risk of exceeding the standard of radioactive elements, which limits their large-scale promotion. In addition, high-temperature pretreatment or calcination activation of raw materials (such as above 600℃) is often required in the preparation process of traditional geopolymers, resulting in increased energy consumption, high equipment cost, and possible damage to the mineral structure of the raw materials, which requires the addition of chemical modifiers to compensate for the performance loss, further increasing the production cost and process complexity.

[0004] Diabase tailings are solid waste generated during the mining and processing of diabase. Currently, the comprehensive utilization rate of diabase tailings is very low, and most of them are directly stored or landfilled, not only occupying land resources, but also posing a risk of heavy metal leaching and environmental pollution. In existing technologies, the utilization of diabase tailings is mostly concentrated in low-value-added fields (such as roadbed filling materials), or requires high-temperature calcination (such as above 1200℃) to activate and improve the reactivity, but such processes have high energy consumption, large equipment investment, and are prone to mineral structure instability during high-temperature treatment, which requires complex formulation adjustment or the introduction of expensive additives, making it difficult to achieve large-scale application.

[0005] Current geopolymer mainly relies on industrial by-products such as fly ash and slag, while diabase tailings as a bulk solid waste has not been effectively used in geopolymer system, and traditional geopolymer raw materials (such as low-activity fly ash, slag, iron / copper metal tailings, kaolin non-metallic tailings, etc.) often need high-temperature calcination pretreatment above 600℃ to improve the reaction activity, resulting in a sharp increase in energy consumption, high cost, and the risk of introducing radioactive elements exceeding the standard, and the low-temperature activation technology of diabase tailings has not been reported, and the existing high-temperature process seriously restricts its environmental protection and economy; and although the existing geopolymer material has high compressive strength, the toughness is generally low (the flexural-compressive ratio is less than 0.25), and the flexural strength is difficult to break through 10MPa, which cannot meet the high-toughness engineering demand (such as anti-seismic structure, anti-cracking pavement, etc.). SUMMARY

[0006] In view of the above prior art, the present application provides a diabase tailings geopolymer cementing material and a preparation method thereof, which solves the problems of high energy consumption and low flexural-compressive ratio of the preparation process of the prior art.

[0007] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is to provide a diabase tailings geopolymer cementing material, which comprises the following components in mass fraction: diabase tailings 80-120 parts, sodium hydroxide 10-20 parts, water glass 80-120 parts, aluminum hydroxide 10-20 parts, water reducing agent 1-3 parts and stabilizing material 2-11 parts.

[0008] The diabase tailings geopolymer cementing material provided by the present application uses solid waste diabase tailings to prepare geopolymer cementing material, does not add harmful solvents, heavy metals and radioactive substances, can realize waste-to-resource, and provides an effective way for the comprehensive utilization of diabase tailings; the compressive strength and flexural strength of the diabase tailings geopolymer cementing material can reach 44.93MPa and 14.77MPa respectively, and the flexural-compressive ratio is 0.33-0.40, which has a significant toughness characteristic; far exceeding the traditional cement (flexural-compressive ratio ≤0.2) and the existing geopolymer (flexural-compressive ratio ≤0.25), and having both rigidity and toughness, which can meet the demand of severe engineering scenes such as anti-seismic and anti-cracking, which is a performance level not seen in the current public literature and patents.

[0009] The present application first uses diabase tailings as the core raw material in the geopolymer system, realizing the high-value resource utilization of solid waste; and the diabase tailings geopolymer cementing material does not contain heavy metals, radioactive substances and harmful solvents, solving the pollution problem of tailings storage from the source, and providing a green technical path for diabase mining.

[0010] On the basis of the above technical scheme, the present application can also be improved as follows.

[0011] Further, the components include the following mass fractions: diabase tailings 100 parts, sodium hydroxide 16 parts, water glass 104 parts, aluminum hydroxide 16 parts, water reducing agent 2 parts, and stabilizing material 6 parts.

[0012] Further, the modulus of the water glass is 2.23.

[0013] Further, the water reducing agent is polycarboxylic acid.

[0014] The beneficial effects of the further technical solutions are that the preferred component ratio of the diabase tailings geopolymer cementitious material enables the final cementitious material to have higher compressive and flexural strengths.

[0015] The application further discloses a preparation method of the diabase tailings geopolymer cementitious material, which comprises the following steps: S1: diabase tailings are dried and activated at 120-300 DEG C, and then the activated diabase tailings are ground into diabase tailings powder; S2: sodium hydroxide, water glass, aluminum hydroxide, water reducing agent and stabilizing material are mixed at room temperature and stirred uniformly with water to obtain an alkali activator; S3: the diabase tailings powder is mixed with the alkali activator, and then stirred at a rotating speed of 100-120 r / min for 5-6 min to obtain diabase tailings geopolymer mixture; S4: the diabase tailings geopolymer mixture is placed in a mold, and cured at room temperature for 24 h, and then removed from the mold for standard curing to obtain the diabase tailings geopolymer cementitious material.

[0016] Further, the drying is drying the diabase tailings at 30-45 DEG C for 3-4 h.

[0017] Further, the activation is placing the diabase tailings at 120-300 DEG C for 3 h.

[0018] The beneficial effects of the further technical solutions are that the application creatively adopts a 120-300 DEG C low-temperature activation process, the energy consumption is reduced by more than 60% compared with the traditional calcination above 600 DEG C, and the mineral structure instability caused by high temperature is avoided; the activated tailings can form a three-dimensional network structure under alkali activation, without the need of additional additives to compensate the performance, so that the formula is significantly simplified and the production cost is reduced.

[0019] Further, the particle size of the diabase tailings powder is 45-100 mu m.

[0020] Further, the liquid-solid ratio of the diabase tailings geopolymer mixture is 0.35.

[0021] Further, the standard curing is curing at 20 DEG C ± 2 DEG C, relative humidity ≥ 95%, for 7 d.

[0022] The beneficial effects of the present application are: the preparation method provided by the present application adopts the way of low-temperature activation of diabase tailings, which reduces energy consumption and reduces harmful substance emissions compared with the traditional high-temperature calcination method, and at the same time, high temperature may damage the original structure of the mineral, which needs to adjust the formula or add additives, increasing the cost and complexity, and the high-temperature process equipment cost is high, the threshold of large-scale production is high, the diabase tailings activated at low temperature in the present application can form a three-dimensional network structure through alkali activation, which has the characteristics of high strength and high toughness, and the performance of the diabase tailings geopolymer cementing material is further improved by curing the diabase tailings geopolymer mixture under the condition of 20±2℃ and relative humidity of 95% or more; therefore, the core advantage of the present application is low energy consumption, low emission and low cost, and at the same time, it has environmental safety and material functionality; the preparation method of the present application has simple preparation process (only drying, low-temperature activation, grinding, mixing and curing), low equipment requirement and low energy consumption, and the whole process is free of high temperature and high pressure steps, which is easy to scale up, provides a popularization scheme for solid waste resource utilization and low-carbon building materials development, and has excellent industrial application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The preparation flow chart of the diabase tailings geopolymer cementing material. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application will be described in detail below in combination with examples.

[0025] Example 1 A diabase tailings geopolymer cementing material, comprising the following components in mass fraction: diabase tailings 100 parts, sodium hydroxide 16 parts, water glass with modulus of 2.23 104 parts, aluminum hydroxide 16 parts, polycarboxylic acid 2 parts and stabilizing material 6 parts (Haisen Co., Ltd. - cement-based permeable crystalline waterproof coating); The preparation method of the diabase tailings geopolymer cementing material of the present example (as shown in Figure 1 The preparation method of the diabase tailings geopolymer cementing material of the present example (as shown in S1: dry the diabase tailings at 40℃ for 3.5h, then place it at 300℃ for 3h for activation, then grind the activated diabase tailings into diabase tailings powder with particle size of 80μm; S2: mix sodium hydroxide, water glass, aluminum hydroxide, polycarboxylic acid and stabilizing material according to the mass fraction at room temperature, and stir uniformly with water to obtain an alkali activator; S3: mix the diabase tailings powder with the alkali activator, then stir at a speed of 120r / min for 5min to obtain a diabase tailings geopolymer mixture (the liquid-solid ratio of the diabase tailings geopolymer mixture is 0.35); S4: the diabase tailings geopolymer mixture is put into a mold, cured at room temperature for 24 h, and then demolded and cured at 20°C and 95% relative humidity for 7 d to obtain the diabase tailings geopolymer cementitious material.

[0026] Example 2 A diabase tailings geopolymer cementitious material comprises the following components in mass fractions: diabase tailings 80 parts, sodium hydroxide 10 parts, water glass with a modulus of 2.23 80 parts, aluminum hydroxide 10 parts, polycarboxylic acid 1 part, and stabilizing material 2 parts (Kao Corporation - cement-based capillary crystalline waterproofing coating); The preparation method of the diabase tailings geopolymer cementitious material in this example (as shown in Figure 1 ) comprises the following steps: S1: the diabase tailings are dried at 30°C for 4 h, then activated at 120°C for 3 h, and then ground into diabase tailings powder with a particle size of 100 μm; S2: sodium hydroxide, water glass, aluminum hydroxide, polycarboxylic acid, and stabilizing material are mixed at room temperature in mass fractions and stirred uniformly with water to obtain an alkali activator; S3: the diabase tailings powder is mixed with the alkali activator, and then stirred at a speed of 100 r / min for 6 min to obtain a diabase tailings geopolymer mixture (the liquid-solid ratio of the diabase tailings geopolymer mixture is 0.35); S4: the diabase tailings geopolymer mixture is put into a mold, cured at room temperature for 24 h, and then demolded and cured at 22°C and 95% relative humidity for 7 d to obtain the diabase tailings geopolymer cementitious material.

[0027] Example 3 A diabase tailings geopolymer cementitious material comprises the following components in mass fractions: diabase tailings 120 parts, sodium hydroxide 20 parts, water glass with a modulus of 2.23 120 parts, aluminum hydroxide 20 parts, polycarboxylic acid 3 parts, and stabilizing material 11 parts (Kao Corporation - cement-based capillary crystalline waterproofing coating); The preparation method of the diabase tailings geopolymer cementitious material in this example (as shown in Figure 1 ) comprises the following steps: S1: the diabase tailings are dried at 45°C for 3 h, then activated at 200°C for 3 h, and then ground into diabase tailings powder with a particle size of 45 μm; S2: sodium hydroxide, water glass, aluminum hydroxide, and polycarboxylic acid are mixed at room temperature in mass fractions and stirred uniformly with water to obtain an alkali activator; S3: mix the diabase tailings powder with the alkali activator, and then stir at a rotating speed of 120 r / min for 5 min to obtain a diabase tailings geopolymer mixture (the liquid-solid ratio of the diabase tailings geopolymer mixture is 0.35); S4: place the diabase tailings geopolymer mixture into a mold, and then perform normal temperature curing for 24 h, and then perform demolding and curing at 20°C and a relative humidity of 95% for 7 d to obtain the diabase tailings geopolymer cementitious material.

[0028] Comparative Example 1 A diabase tailings geopolymer cementitious material includes the following components in mass fractions: diabase tailings 100 parts, sodium hydroxide 16 parts, water glass with a modulus of 2.23 104 parts, aluminum hydroxide 16 parts, polycarboxylic acid 2 parts, and a stabilizing material 6 parts (Hayashibara Co., Ltd. - cement-based permeable crystalline waterproof coating); The preparation method of the diabase tailings geopolymer cementitious material of the embodiment includes the following steps: S1: dry the diabase tailings at 40°C for 3.5 h, and then place the diabase tailings at normal temperature for 3 h, and then grind the diabase tailings into diabase tailings powder with a particle size of 80 μm; S2: mix sodium hydroxide, water glass, aluminum hydroxide, polycarboxylic acid, and a stabilizing material in mass fractions at normal temperature, and then stir uniformly with water to obtain an alkali activator; S3: mix the diabase tailings powder with the alkali activator, and then stir at a rotating speed of 120 r / min for 5 min to obtain a diabase tailings geopolymer mixture (the liquid-solid ratio of the diabase tailings geopolymer mixture is 0.35); S4: place the diabase tailings geopolymer mixture into a mold, and then perform normal temperature curing for 24 h, and then perform demolding and curing at 20°C and a relative humidity of 95% for 7 d to obtain the diabase tailings geopolymer cementitious material.

[0029] Comparative Example 2 A diabase tailings geopolymer cementitious material includes the following components in mass fractions: diabase tailings 100 parts, sodium hydroxide 16 parts, water glass with a modulus of 2.23 104 parts, aluminum hydroxide 16 parts, polycarboxylic acid 2 parts, and a stabilizing material 6 parts (Hayashibara Co., Ltd. - cement-based permeable crystalline waterproof coating); The preparation method of the diabase tailings geopolymer cementitious material of the embodiment includes the following steps: S1: dry the diabase tailings at 40°C for 3.5 h, and then place the diabase tailings at normal temperature for 3 h, and then grind the diabase tailings into diabase tailings powder with a particle size of 80 μm; S2: mix sodium hydroxide, water glass, aluminum hydroxide, polycarboxylic acid, and a stabilizing material in mass fractions at normal temperature, and then stir uniformly with water to obtain an alkali activator; S3: mix the diabase tailing powder with the alkali activator, and then stir at a rotating speed of 120 r / min for 5 min, to obtain a diabase tailing geopolymer mixture (the liquid-solid ratio of the diabase tailing geopolymer mixture is 0.35); S4: place the diabase tailing geopolymer mixture into a mold, and then cure at room temperature for 24 h, and then remove the mold and seal the bag for curing at room temperature for 7 d, to obtain the diabase tailing geopolymer cementitious material.

[0030] Comparative Example 3 A diabase tailing geopolymer cementitious material comprises the following components in mass fraction: diabase tailing 100 parts, sodium hydroxide 16 parts, water glass with modulus 2.23 104 parts, aluminum hydroxide 16 parts, polycarboxylic acid 2 parts, and stabilizing material 6 parts (Hayashino Co., Ltd.-cement-based permeable crystalline waterproof coating); The preparation method of the diabase tailing geopolymer cementitious material of the embodiment comprises the following steps: S1: dry the diabase tailing at 40℃ for 3.5 h, and then activate the diabase tailing at 300℃ for 3 h, and then grind the activated diabase tailing into diabase tailing powder with a particle size of 80 μm; S2: mix sodium hydroxide, water glass, aluminum hydroxide, polycarboxylic acid, and stabilizing material in mass fraction at room temperature, and then stir uniformly with water, to obtain an alkali activator; S3: mix the diabase tailing powder with the alkali activator, and then stir at a rotating speed of 120 r / min for 5 min, to obtain a diabase tailing geopolymer mixture (the liquid-solid ratio of the diabase tailing geopolymer mixture is 0.35); S4: place the diabase tailing geopolymer mixture into a mold, and then cure at room temperature for 24 h, and then remove the mold and seal the bag for curing at room temperature for 7 d, to obtain the diabase tailing geopolymer cementitious material.

[0031] Comparative Example 4 A diabase tailing geopolymer cementitious material comprises the following components in mass fraction: diabase tailing 80 parts, sodium hydroxide 10 parts, water glass with modulus 2.23 80 parts, aluminum hydroxide 10 parts, polycarboxylic acid 1 part, and stabilizing material 2 parts (Hayashino Co., Ltd.-cement-based permeable crystalline waterproof coating); The preparation method of the diabase tailing geopolymer cementitious material of the embodiment comprises the following steps: S1: dry the diabase tailing at 30℃ for 4 h, and then activate the diabase tailing at 120℃ for 3 h, and then grind the activated diabase tailing into diabase tailing powder with a particle size of 100 μm; S2: mix sodium hydroxide, water glass, aluminum hydroxide, polycarboxylic acid, and stabilizing material in mass fraction at room temperature, and then stir uniformly with water, to obtain an alkali activator; S3: mixing the diabase tailings powder with an alkali activator, and then stirring at a speed of 100 r / min for 6 minutes to obtain a diabase tailings geopolymer mixture (the liquid-solid ratio of the diabase tailings geopolymer mixture is 0.35); S4: Place the diabase tailings geopolymer mixture into a mold, cure at room temperature for 24 hours, then remove the mold and put it into a sealed bag for curing at room temperature for 7 days to obtain the diabase tailings geopolymer cementitious material.

[0032] Comparative Example 5 A diabase tailings geopolymer cementitious material comprising the following components in parts by weight: 120 parts of diabase tailings, 20 parts of sodium hydroxide, 120 parts of water glass with a modulus of 2.23, 20 parts of aluminum hydroxide, 3 parts of polycarboxylic acid, and 11 parts of a stabilizing material (Haizhisen Co., Ltd. - cement-based penetrating crystalline waterproof coating); The preparation method of the diabase tailings geopolymer gelling material in this embodiment comprises the following steps: S1: The diabase tailings were dried at 45°C for 3 h, then placed at 200°C for 3 h for activation, and then the activated diabase tailings were ground into diabase tailings powder with a particle size of 45 μm; S2: Sodium hydroxide, water glass, aluminum hydroxide, polycarboxylic acid and stabilizing material are mixed at room temperature according to their mass fractions and stirred evenly with water to obtain an alkaline activator; S3: mixing the diabase tailings powder with an alkali activator, and then stirring at a speed of 120 r / min for 5 minutes to obtain a diabase tailings geopolymer mixture (the liquid-solid ratio of the diabase tailings geopolymer mixture is 0.35); S4: Place the diabase tailings geopolymer mixture into a mold, cure at room temperature for 24 hours, then remove the mold and put it into a sealed bag and cure at room temperature for 7 days to obtain the diabase tailings geopolymer cementitious material.

[0033] Comparative Example 6 A diabase tailings geopolymer cementitious material comprising the following components in parts by weight: 100 parts of diabase tailings, 16 parts of sodium hydroxide, 104 parts of water glass with a modulus of 2.23, 16 parts of aluminum hydroxide, 2 parts of polycarboxylic acid, and 6 parts of a stabilizing material (Haizhisen Co., Ltd. - cement-based penetrating crystalline waterproof coating); The preparation method of the diabase tailings geopolymer gelling material in this embodiment comprises the following steps: S1: The diabase tailings were dried at 40°C for 3.5 h, then calcined at 600°C for 1 h for activation, and then the activated diabase tailings were ground into diabase tailings powder with a particle size of 80 μm; S2: Sodium hydroxide, water glass, aluminum hydroxide, polycarboxylic acid and stabilizing material are mixed at room temperature according to their mass fractions and stirred evenly with water to obtain an alkaline activator; S3: mixing the diabase tailing powder with alkali activator, and then stirring at a rotating speed of 120 r / min for 5 min to obtain a diabase tailing geopolymer mixture (the liquid-solid ratio of the diabase tailing geopolymer mixture is 0.35); S4: placing the diabase tailing geopolymer mixture into a mold, curing at room temperature for 24 h, and then demolding and curing at 20℃ and a relative humidity of 95% for 7 d to obtain the diabase tailing geopolymer cementitious material.

[0034] Experimental Example 1 Chemical composition analysis of diabase tailing: the diabase tailing was subjected to XDF analysis, and the results are shown in Table 1.

[0035] Table 1 Chemical composition table of diabase tailing

[0036] The diabase tailing contains a large amount of SiO2 and Al2O3, and is a good precursor of potential alkali-activated cementitious material. Under the activation of an alkaline solution, a three-dimensional network structure gel body is formed. This material has fast strength development, good durability, and extremely low carbon emissions, and has broad industrial application prospects.

[0037] Experimental Example 2 Compressive strength experiment: the diabase tailing geopolymer cementitious materials prepared in Examples 1-3 and Comparative Examples 1-5 were cured for 7 d, and their compressive strengths were tested, respectively. The results are shown in Table 1.

[0038] Table 1 Compressive strength test results

[0039] Experimental Example 3 Flexural strength experiment: the diabase tailing geopolymer cementitious materials prepared in Examples 1-3 and Comparative Examples 1-5 were cured for 7 d, and their flexural strengths were tested, respectively. The results are shown in Table 2.

[0040] Table 2 Flexural strength test results

[0041] In summary, the diabase tailings geopolymer cementing material of the present application adopts low-temperature activation technology, compared with the traditional high-temperature calcination activation (comparative example 6), reduces energy consumption, reduces harmful substance emissions, and at the same time obtains a cementing material with better compressive and flexural strength, when the activation temperature is 300 DEG C, the compressive and flexural strength of the diabase tailings geopolymer cementing material obtained can reach 44.93 MPa and 14.77 MPa, which shows its excellent performance, and in the preparation method of the present application, the cementing material is subjected to standard curing (examples 1-3), compared with sealed curing (comparative examples 3-5), it also has better compressive and flexural strength, therefore the low-temperature activation technology + standard curing under suitable conditions of the present application obtains a diabase tailings geopolymer cementing material with high compressive strength and high toughness; and the preparation method has simple process, low cost and small energy consumption, and has excellent industrial application prospect.

[0042] Although the specific embodiments of the present application are described in detail with reference to the examples, it should not be understood as limiting the scope of protection of the patent. Various modifications and variations within the scope of the claims described still belong to the scope of protection of the patent without creative labor of those skilled in the art.

Claims

1. A diabase tailings geopolymer cementitious material, characterized in that, The components include the following mass fractions: diabase tailings 80-120 parts, sodium hydroxide 10-20 parts, water glass 80-120 parts, aluminum hydroxide 10-20 parts, water reducing agent 1-3 parts, and stabilizing material 2-11 parts.

2. The diabase tailings geopolymer cementitious material of claim 1, wherein, The components include the following mass fractions: diabase tailings 100 parts, sodium hydroxide 16 parts, water glass 104 parts, aluminum hydroxide 16 parts, water reducing agent 2 parts, and stabilizing material 6 parts.

3. The diabase tailings geopolymer cementitious material of claim 2, wherein: The modulus of the water glass is 2.

23.

4. The diabase tailings geopolymer cementitious material of claim 2, wherein: The water reducing agent is polycarboxylic acid.

5. The method of producing diabase tailings geopolymer cementitious material according to any one of claims 1 to 4, characterised in that, The method includes the following steps: S1: diabase tailings are dried and activated at 120-300°C, and then the activated diabase tailings are ground into diabase tailings powder; S2: sodium hydroxide, water glass, aluminum hydroxide, water reducing agent, and stabilizing material are mixed at room temperature and stirred uniformly with water to obtain an alkali activator; S3: the diabase tailings powder is mixed with the alkali activator, and then stirred at a rotation speed of 100-120 r / min for 5-6 min to obtain a diabase geopolymer mixture; S4: the diabase geopolymer mixture is placed in a mold, cured at room temperature for 24 h, then removed from the mold and cured under standard conditions to obtain a diabase geopolymer cementing material.

6. The method of claim 5, wherein the diagenetic cementitious material is prepared from diabase tailings. The drying is drying the diabase tailings at 30-45°C for 3-4 h.

7. The method of claim 5, wherein the diagenetic cementitious material is prepared from diabase tailings. The activation is placing the diabase tailings at 120-300°C for 3 h.

8. The method of claim 5, wherein the diagenetic cementitious material is prepared from diabase tailings. The particle size of the diabase tailings powder is 45-100 µm.

9. The method of claim 5, wherein the diagenetic cementitious material is prepared from diabase tailings. The liquid-solid ratio of the diabase geopolymer mixture is 0.

35.

10. The method of claim 5, wherein the diagenetic cementitious material is prepared from diabase tailings. The standard curing is curing at 20±2°C, relative humidity ≥95%, for 7 d.

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