Curing agent for curing building residue soil as well as preparation method and application of curing agent

Abstract

The invention discloses a curing agent for curing building residue soil as well as a preparation method and application of the curing agent. The curing agent is prepared from the following components: 20 to 35 parts of cement clinker, 30 to 40 parts of modified desulfurized fly ash, 15 to 25 parts of industrial waste gypsum, 20 to 30 parts of slag and 0.5 to 1.5 parts of dispersing agent, the preparation method of the curing agent comprises the following steps: weighing the cement clinker, the modified desulfurized fly ash, the industrial waste gypsum, the slag and the dispersing agent in parts by weight, adding into mixing equipment, stirring for 5-10 minutes, and uniformly mixing to obtain the curing agent. The construction waste soil curing agent disclosed by the invention can improve the compressive strength and the overall stability of a road stable base layer, and is beneficial to enhancing the bearing capacity and durability of the construction waste soil in engineering application.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a curing agent for curing building debris, a preparation method and an application thereof. Background Art

[0002] Construction waste solidifier is a material used to improve and enhance the performance of construction waste (including engineering waste, engineering mud, and bottom mud produced by dredging of rivers, lakes and reservoirs, etc.) during the construction process. These solidifiers enhance the strength, stability and durability of the waste through physical or chemical reactions with the waste, water, air, etc.

[0003] There are many types of construction waste solidifying agents, which can be divided into the following categories according to different classification standards: 1) Lime cement solidifying agent: the main components are cement and lime, with the characteristics of fast hardening and high strength; 2) Slag silicate solidifying agent: made of materials such as slag and silicate, with the characteristics of environmental protection and stable performance; 3) Polymer solidifying agent: the main component is polymer material, divided into two types: organic polymer and inorganic polymer, with good curing effect and impact resistance; 4) Heat pump solidifying agent: a new type of curing material, the main components are inorganic compounds and heat pump materials, with good curing effect, fast curing speed, harmless and environmentally friendly; 5) Other curing agents: such as light curing agent, microbial curing agent, electrochemical curing agent, etc., have their own unique characteristics and scope of application.

[0004] However, the current construction waste solidifying agent is still not ideal in terms of use effect, and the compressive strength of the construction waste solidifying agent used in combination with the construction waste in the road stabilization base is still not ideal. Therefore, a new type of construction waste solidifying agent is needed to improve its use effect. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a curing agent for curing construction waste, and a preparation method and application thereof.

[0006] The technical solution of the present invention is: a curing agent for curing construction waste soil, which comprises the following components by weight: 20 to 35 parts of cement clinker, 30 to 40 parts of modified desulfurized ash, 15 to 25 parts of industrial waste gypsum, 20 to 30 parts of slag, and 0.5 to 1.5 parts of dispersant.

[0007] Furthermore, the preparation method of the modified desulfurized ash is:

[0008] 1) Desulfurized ash, manganese dioxide and triethanolamine are mixed in a mass ratio of 50:4-5:3-10 to form a grinding system, the grinding system is ground at a grinding speed of R, and after the grinding system rises to X, atomized water is sprayed to the grinding system to reduce the grinding system to Y, and this is repeated until atomized water accounting for 20-25% of the mass of the desulfurized ash is sprayed, wherein R is 1000-1200rpm, X is 50-60°C, and Y is 25-30°C;

[0009] 2) Then, hydrogen peroxide (mass concentration is 20%) accounting for 30-35% of the mass of the desulfurized ash is sprayed into the grinding system and stirred for 40-60 minutes, and then stirred for another 10-20 minutes to obtain modified desulfurized ash.

[0010] Description: By introducing manganese dioxide and triethanolamine during the grinding process, the composition and structure of desulfurized ash can be changed, and the temperature rise effect generated by grinding and the cooling effect generated by spraying atomized water can be used to make the reaction system change temperature multiple times. Under this temperature change, the treatment effect of desulfurized ash can be enhanced. The introduction of manganese dioxide and atomized water can increase the content of calcium sulfate in desulfurized ash, increase its inorganic content, and promote the conversion of sulfide. The introduction of triethanolamine can stabilize the grinding system and make the desulfurized ash particles finer, improve its fluidity, and enhance the use performance of the treated desulfurized ash.

[0011] By performing the above-mentioned modification treatment on the desulfurized ash, the hardening performance of the curing agent can be enhanced during use, and the compaction density and strength can be improved, so that the prepared curing agent has a better use effect.

[0012] Furthermore, X and Y are affected by the grinding speed, specifically, satisfying the following formula:

[0013]

[0014]

[0015] Among them, X0 is the actual heating temperature, Y0 is the actual cooling temperature, R0 is the actual grinding speed, R min is the minimum value of grinding speed, R max is the maximum value of grinding speed, X min is the minimum value of the heating temperature, Y max is the maximum value of the cooling temperature.

[0016] Note: Since the grinding speed determines the temperature change of the grinding system to a certain extent, when high-speed grinding is adopted, it is usually necessary to increase the temperature rise limit and reduce the temperature drop limit to ensure that the appropriate temperature rise / drop limit can adapt to the current grinding parameters, thereby ensuring the effect of the grinding process;

[0017] Under low-speed grinding, due to the influence of grinding, increasing the temperature rise limit and reducing the temperature drop limit will significantly reduce the processing efficiency, and there is no obvious effect of enhancing the effect. Therefore, it is necessary to ensure that the appropriate temperature rise / cooling limit can adapt to the current grinding parameters and ensure the efficiency of the grinding process;

[0018] Therefore, by using the above formula to regulate the grinding speed and the temperature rise / cooling limit, the grinding process efficiency and grinding process effect can be guaranteed.

[0019] Furthermore, the dispersant is a mixture of dodecyl sulfonate and wood sulfonate in a mass ratio of 1:2 to 5.

[0020] Description: The dispersant with the above ratio can evenly disperse the solid particles in the mixed system to form a stable dispersion system, thereby ensuring the uniformity and consistency of the material after curing, and by adsorbing on the surface of the solid particles, it can effectively reduce the interfacial tension between the particles and the medium, making the particles easier to be wetted and dispersed, thereby improving the dispersion efficiency and stability of the solid particles in the curing agent.

[0021] Furthermore, the industrial waste gypsum is one or more of titanium gypsum, phosphogypsum, and desulfurized gypsum.

[0022] Description: The above-mentioned industrial waste gypsum has significant environmental and economic benefits. By using it in the preparation of curing agent, the pollution problem of secondary environment can be effectively controlled, and the pressure of waste on the environment can be reduced. In addition, the above-mentioned industrial waste gypsum can be reused as a resource to replace primary mineral resources, so as to achieve source reduction and harm reduction and resource recycling. However, it should be noted that it is not limited to these types of industrial waste gypsum, and when there are multiple choices, any ratio of mixing can be adopted.

[0023] The present invention also provides a method for preparing a curing agent for curing building debris, comprising the following steps:

[0024] S1. Curing agent ingredients: weigh cement clinker, modified desulfurized ash, industrial waste gypsum, slag and dispersant according to the weight ratio for standby use;

[0025] S2. Preparation of curing agent: Add cement clinker, modified desulfurization ash, industrial waste gypsum, slag and dispersant into a mixing device and stir for 5 to 10 minutes to obtain a curing agent after mixing.

[0026] Description: The curing agent prepared by the above preparation method can form a tight bond between the originally loose slag particles, thereby improving the compressive strength, shear strength and overall stability of the road stabilization base, helping to enhance the bearing capacity and durability of the slag in engineering applications, and the solidified construction slag has better density and lower permeability, which can effectively prevent water penetration and soil erosion, and improve the waterproof performance and durability of construction projects.

[0027] Furthermore, in S2, the stirring temperature is controlled at 30-35° C., and after mixing, the mixture is naturally cooled to room temperature to obtain the curing agent.

[0028] Note: By appropriately increasing the temperature during the mixing process, it helps to improve the effectiveness of the curing agent in curing construction waste.

[0029] The present invention also provides an application of a curing agent for curing construction waste soil, wherein the curing agent is added to a base material of a road stabilizing base at a dosage of 5-15% by mass and mixed evenly to obtain soil material for a road stabilizing base layer, wherein the base material is construction waste soil.

[0030] Description: By using curing agents, construction waste such as construction debris can be converted into valuable engineering materials, realizing the resource utilization of waste and reducing the demand for mining of raw materials such as natural sand and gravel, which helps promote green buildings and sustainable development.

[0031] The beneficial effects of the present invention are:

[0032] (1) The present invention utilizes modified desulfurized ash to enable the construction waste solidifying agent to strengthen the close bonding between construction waste particles, thereby improving the compressive strength and overall stability of the road stabilization base, helping to enhance the bearing capacity and durability of construction waste in engineering applications, and enabling the road stabilization base to have better density and lower permeability, which can effectively prevent water penetration and soil erosion.

[0033] (2) The present invention uses a formula to regulate the grinding rotation speed and the heating / cooling limit value, so that the modified desulfurization ash has an excellent modification treatment effect during the preparation process, while ensuring the efficiency of the grinding treatment, thereby improving the preparation efficiency of the construction waste solidifying agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a flow chart of the preparation method of the curing agent of the present invention. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with specific implementation methods to better reflect the advantages of the present invention.

[0036] Example 1: A curing agent for curing construction waste, comprising the following components by weight: 32 parts of cement clinker, 37 parts of modified desulfurized ash, 22 parts of industrial waste gypsum, 25 parts of slag, and 1.2 parts of dispersant.

[0037] Wherein, the preparation method of the modified desulfurized ash is:

[0038] 1) Desulfurized ash, manganese dioxide and triethanolamine are mixed in a mass ratio of 50:4.5:8 to form a grinding system, and the grinding system is ground at a grinding speed of R. After the grinding system rises to X, atomized water is sprayed to the grinding system to reduce the grinding system to Y, and this is repeated until atomized water accounting for 23% of the mass of the desulfurized ash is sprayed, wherein R is 1100rpm, X is 57°C, and Y is 28°C;

[0039] 2) Then, hydrogen peroxide (mass concentration is 20%) accounting for 33% of the mass of the desulfurized ash is sprayed into the grinding system and stirred for 55 minutes, and then stirred for another 15 minutes to obtain modified desulfurized ash.

[0040] The industrial waste gypsum is titanium gypsum, and the moisture content of the titanium gypsum is 3%.

[0041] The composition ratio of the cement clinker is: 66wt% CaO, 24wt% SiO2, 6wt% Al2O3, and 4wt% Fe2O3.

[0042] The slag comprises 42wt% of calcium oxide, 36wt% of silicon dioxide, 10wt% of aluminum oxide, 7wt% of magnesium oxide, 4.8wt% of iron oxide, and other trace impurities.

[0043] The dispersant is a mixture of dodecyl sulfonate and wood sulfonate in a mass ratio of 1:4.

[0044] Example 2: This example provides a method for preparing the curing agent of Example 1, such as Figure 1 As shown, the following steps are included:

[0045] S1. Curing agent ingredients: weigh cement clinker, modified desulfurized ash, industrial waste gypsum, slag and dispersant according to the weight ratio for standby use;

[0046] S2. Preparation of curing agent: Cement clinker, modified desulfurized ash, industrial waste gypsum, slag and dispersant are added to a mixing device and stirred for 7 minutes. The stirring temperature is controlled at 32°C. After mixing, the curing agent is obtained by naturally cooling to room temperature. It is understood that room temperature refers to 25°C.

[0047] Example 3: This example provides an application of the curing agent of Example 1, wherein the curing agent is added to the base material of the road stabilization base at a dosage of 6% by mass and mixed evenly to obtain soil material for the road stabilization base, wherein the base material is construction waste.

[0048] Example 4: This example is different from Example 1 in that the curing agent includes the following components: 20 parts of cement clinker, 30 parts of modified desulfurization ash, 15 parts of industrial waste gypsum, 20 parts of slag, and 0.5 parts of dispersant.

[0049] Example 5: This example is different from Example 1 in that the curing agent includes the following components: 35 parts of cement clinker, 40 parts of modified desulfurization ash, 25 parts of industrial waste gypsum, 30 parts of slag, and 1.5 parts of dispersant.

[0050] Example 6: This example is different from Example 1 in that the desulfurization ash, manganese dioxide and triethanolamine are mixed in a mass ratio of 50:4:3 to form a grinding system; until atomized water accounting for 20% of the mass of the desulfurization ash is sprayed.

[0051] Example 7: This example is different from Example 1 in that desulfurized ash, manganese dioxide and triethanolamine are mixed in a mass ratio of 50:5:10 to form a grinding system, until atomized water accounting for 25% of the mass of the desulfurized ash is sprayed.

[0052] Example 8: The difference between this example and Example 1 is that the preparation method of the modified desulfurization ash is: 1) desulfurization ash, manganese dioxide, and triethanolamine are mixed in proportion to form a grinding system, the grinding system is ground at a grinding speed of R, and after the grinding system rises to X, atomized water is sprayed into the grinding system to reduce the grinding system to Y, and this process is repeated until atomized water accounting for 23% of the mass of the desulfurization ash is sprayed, wherein R is 1200rpm, X is 50°C, and Y is 25°C.

[0053] Example 9: The difference between this example and Example 1 is that the preparation method of the modified desulfurization ash is: 1) desulfurization ash, manganese dioxide, and triethanolamine are mixed in proportion to form a grinding system, the grinding system is ground at a grinding speed of R, and after the grinding system rises to X, atomized water is sprayed into the grinding system to reduce the grinding system to Y, and this process is repeated until atomized water accounting for 23% of the mass of the desulfurization ash is sprayed, wherein R is 1000rpm, X is 60°C, and Y is 30°C.

[0054] Example 10: This example is different from Example 1 in that the method for preparing the modified desulfurization ash is: 2) subsequently spraying 30% of the mass of the desulfurization ash with hydrogen peroxide (mass concentration of 20%) into the grinding system and stirring for 40 minutes, and then maintaining stirring for another 10 minutes to obtain modified desulfurization ash.

[0055] Example 11: This example is different from Example 1 in that the preparation method of the modified desulfurization ash is: 2) Then spray hydrogen peroxide (mass concentration is 20%) accounting for 35% of the mass of the desulfurization ash into the grinding system and stir for 60 minutes, and then keep stirring for 20 minutes to obtain modified desulfurization ash.

[0056] Embodiment 12: This embodiment is different from Embodiment 1 in that X and Y are affected by the grinding speed, specifically, satisfying the following formula:

[0057]

[0058] Among them, X0 is the actual heating temperature, Y0 is the actual cooling temperature, R0 is the actual grinding speed, R min is the minimum value of grinding speed, R max is the maximum value of grinding speed, X min is the minimum value of the heating temperature, Y max is the maximum value of the cooling temperature;

[0059] The heating / cooling temperature correction is as follows: In Example 1, R0 is 1100 rpm. According to the above formulas (1) and (2), X0 is 55°C and Y0 is 27.5°C.

[0060] Embodiment 13: This embodiment is different from Embodiment 8 in that X and Y are affected by the grinding speed, specifically, satisfying the following formula:

[0061]

[0062] Among them, X0 is the actual heating temperature, Y0 is the actual cooling temperature, R0 is the actual grinding speed, R min is the minimum value of grinding speed, R max is the maximum value of grinding speed, X min is the minimum value of the heating temperature, Y max is the maximum value of the cooling temperature;

[0063] The heating / cooling temperature correction is as follows: In Example 1, R0 is 1200 rpm. According to the above formulas (1) and (2), X0 is 60°C and Y0 is 30°C.

[0064] Embodiment 14: This embodiment is different from Embodiment 9 in that X and Y are affected by the grinding speed, specifically, satisfying the following formula:

[0065]

[0066]

[0067] Among them, X0 is the actual heating temperature, Y0 is the actual cooling temperature, R0 is the actual grinding speed, R min is the minimum value of grinding speed, R max is the maximum value of grinding speed, X min is the minimum value of the heating temperature, Y max is the maximum value of the cooling temperature;

[0068] The heating / cooling temperature correction is as follows: In Example 1, R0 is 1000 rpm, and according to the above formulas (1) and (2), X0 is 50°C and Y0 is 25°C.

[0069] Example 15: This example is different from Example 2 in that S2, preparation of curing agent: cement clinker, modified desulfurization ash, industrial waste gypsum, slag, and dispersant are added to a mixing device and stirred for 5 minutes. The stirring temperature is controlled at 30°C. After mixing, the curing agent is obtained by naturally cooling to room temperature.

[0070] Example 16: This example is different from Example 2 in that, S2, preparation of curing agent: cement clinker, modified desulfurization ash, industrial waste gypsum, slag, and dispersant are added to a mixing equipment and stirred for 10 minutes. The stirring temperature is controlled at 35°C. After mixing, the curing agent is obtained by naturally cooling to room temperature.

[0071] Example 17: This example is different from Example 3 in that the curing agent is added to the base material of the road stabilization base at a dosage of 8% by mass and mixed evenly to obtain soil material for the road stabilization base.

[0072] Example 18: This example is different from Example 3 in that the curing agent is added to the base material of the road stabilization base at a content of 15% by mass and mixed evenly to obtain soil material for the road stabilization base.

[0073] Application experiment example:

[0074] 1. Selection of raw materials

[0075] Industrial waste gypsum uses titanium gypsum from a factory in this city as raw material; the dispersant is a mixture of dodecyl sulfonate and wood sulfonate; dodecyl sulfonate and wood sulfonate are purchased from commercial products;

[0076] Among them, the proportion of each component of cement clinker is shown in Table 1:

[0077] Table 1 Proportion of each component of cement clinker

[0078] Material CaO <![CDATA[SiO2]]> <![CDATA[Al2O3]]> <![CDATA[Fe2O3]]> Cement clinker 66wt% 24wt% 6wt% 4wt%

[0079] The proportion of each component of slag is shown in Table 2:

[0080] Table 2 Proportion of each component of slag

[0081] Material CaO <![CDATA[SiO2]]> <![CDATA[Al2O3]]> MgO <![CDATA[Fe2O3]]> slag 42wt% 36wt% 10wt% 7wt% 4.8wt%

[0082] 2. Characterization of Industrial Waste Gypsum Properties

[0083] Take three equal groups of titanium gypsum from a certain factory in this city, each group with a mass of m = 200g, and put them into an electric constant temperature blast drying oven. Adjust the temperature in the drying oven to 80℃ and dry to constant weight. Measure the weight m0 of the remaining titanium gypsum. The calculation formula of the moisture content w is as follows:

[0084]

[0085] Wherein, w is the moisture content, m0 is the average mass of titanium gypsum when dried to constant weight (g), and m is the mass of undried titanium gypsum;

[0086] It is calculated that the w of titanium gypsum produced by a factory in this city is 35%, while this product needs to control the w of titanium gypsum to 3%. Therefore, in actual operation, the titanium gypsum is properly dried to keep its moisture content at 3%.

[0087] 3. Experimental Sample Preparation

[0088] Cement clinker, modified desulfurized ash, industrial waste gypsum, slag and dispersant are added to a mixing device for stirring, and a curing agent is prepared by the preparation method of each embodiment to obtain a curing agent.

[0089] 4. Performance Testing Methods

[0090] With reference to the standard "Technical Specifications for Application of GS Soil Hardener", the compressive strength test of the curing agent was carried out.

[0091] V. Experimental Results

[0092] Comparative Example 1: Commercially available cement was used as a curing agent;

[0093] Comparative Example 2: The modified desulfurized ash was replaced with desulfurized ash without modification, and the other parameters were the same as those in Example 1;

[0094] The compressive strength test was performed on the curing agent prepared in each embodiment, and the test results are shown in Table 3 below:

[0095] Table 3 Performance statistics of curing agent

[0096] Group Compressive strength / MPa Group Compressive strength / MPa Example 1 55.78 Embodiment 11 54.92 Example 4 54.43 Example 12 56.69 Example 5 55.29 Embodiment 13 55.47 Example 6 54.95 Embodiment 14 56.23 Example 7 55.39 Embodiment 15 55.25 Example 8 54.66 Example 16 55.64 Example 9 55.51 Comparative Example 1 57.11 Example 10 55.37 Comparative Example 2 52.36

[0097] From the data in Table 3, it can be seen that the performance requirements of the "GS Soil Hardener Application Technical Specifications" are met when the curing agent of the present invention is used, and after curing for 28 days, the hardness is greater than 32.5MPa; at the same time, by comparing Example 1 with Control Example 1 and Control Example 2, it can be seen that the curing agent product of the present invention can utilize industrial waste gypsum and other materials and achieve a performance close to that of cement, compared with commercially available cement, and when untreated desulfurized ash is used for the preparation and use of the curing agent, its use effect is significantly reduced.

[0098] It can be seen that by using modified desulfurization ash, the curing agent can have a good use effect; at the same time, the following research and analysis are carried out:

[0099] 1) The influence of different combinations of curing agents on the curing agent use effect

[0100] By comparing Example 4 and Example 5 with Example 1, it can be seen that the preparation of the curing agent using different proportions of the components has a certain influence on the compressive strength of the curing agent. After adjusting the components on the basis of Example 1, the compressive strength of the curing agent decreased. Therefore, the use performance of the curing agent under the proportion of Example 1 is relatively optimal.

[0101] 2) The influence of different raw material dosages of modified desulfurization ash on the use effect of modified desulfurization ash

[0102] By comparing Example 6 and Example 7 with Example 1, it can be seen that the modified desulfurization ash prepared by grinding with different ratios of desulfurization ash, manganese dioxide and triethanolamine has certain differences in the use effect of the modified desulfurization ash in the curing agent. After adjusting each component on the basis of Example 1, the compressive strength of the curing agent decreased. Therefore, the modified desulfurization ash prepared by the raw material dosage of the modified desulfurization ash under the ratio of Example 1 has relatively optimal use performance;

[0103] 3) Effect of different preparation methods of modified desulfurization ash (grinding system processing parameters) on the use effect of modified desulfurization ash

[0104] By comparing Example 8 and Example 9 with Example 1, it can be seen that under different grinding speeds and heating / cooling cycle limits, there are certain differences in the compressive strength of the curing agents prepared therefrom. When the grinding speed is increased and the heating / cooling cycle limit is reduced, the use effect of the curing agent prepared using the modified desulfurized ash is reduced. When the grinding speed is reduced and the heating / cooling cycle limit is increased, the use effect of the curing agent prepared using the modified desulfurized ash is also reduced. This may be because the too slow grinding speed makes it difficult for its temperature to reach the heating limit in a short time, so that the temperature of the entire grinding system is in a certain temperature section for too long, thereby affecting the treatment effect of the desulfurized ash. Therefore, the use effect of the modified desulfurized ash prepared by the grinding system processing parameters of Example 1 is relatively optimal.

[0105] 4) Effect of different preparation methods of modified desulfurization ash (hydrogen peroxide treatment parameters) on the use effect of modified desulfurization ash

[0106] By comparing Example 10 and Example 11 with Example 1, it can be seen that the use of different stirring times and hydrogen peroxide addition amounts have a certain influence on the use effect of the prepared modified desulfurization ash. On the basis of Example 1, the amount of hydrogen peroxide and the stirring time are reduced, so that the use effect of the curing agent prepared using the modified desulfurization ash is reduced, and the amount of hydrogen peroxide and the stirring time are increased, so that the use effect of the curing agent prepared using the modified desulfurization ash is reduced. This may be due to the excessive addition of hydrogen peroxide and the stirring time, which causes the mixed system to be oxidized for too long, which reduces the use effect of the modified desulfurization ash. Therefore, the use effect of the modified desulfurization ash prepared by the hydrogen peroxide treatment parameters of Example 1 is relatively optimal;

[0107] 5) Effect of different preparation methods of modified desulfurization ash (correction of heating / cooling treatment parameters) on the use effect of modified desulfurization ash

[0108] By comparing Example 12 with Example 1, Example 13 with Example 8, and Example 14 with Example 9, it can be seen that after the heating / cooling processing parameters of Example 1, Example 8, and Example 9 are corrected by using Formula (1) and Formula (2), the use effects of each embodiment are improved.

[0109] Among them, after the heating / cooling treatment parameters of Example 1 were corrected by formula (1) and formula (2), the compressive strength of the curing agent prepared was increased from 55.78 MPa to 56.69 MPa; after the heating / cooling treatment parameters of Example 8 were corrected by formula (1) and formula (2), the compressive strength of the curing agent prepared was increased from 54.66 MPa to 55.47 MPa; after the heating / cooling treatment parameters of Example 9 were corrected by formula (1) and formula (2), the compressive strength of the curing agent prepared was increased from 55.51 MPa to 56.23 MPa.

[0110] Therefore, by using formula (1) and formula (2) to control the grinding speed and the temperature rise / cooling limit, the grinding process efficiency and grinding process effect can be guaranteed.

[0111] 6) The influence of different curing agent preparation parameters on the curing agent use effect

[0112] By comparing Example 15 and Example 16 with Example 1, it can be seen that the use of different stirring times and stirring temperatures has a certain impact on the use effect of the prepared curing agent. Reducing the stirring time and stirring temperature on the basis of Example 1 reduces the use effect of the prepared curing agent, and increasing the stirring time and stirring temperature on the basis of Example 1 also reduces the use effect of the prepared curing agent. This may be because too high a stirring temperature will reduce the mixing promotion effect of the curing agent, thereby affecting the use effect of the curing agent. Therefore, the use effect of the curing agent prepared by the curing agent preparation parameters of Example 1 is relatively optimal.

Claims

1. A curing agent for curing building debris, characterized in that: The curing agent comprises the following components by weight: 20 to 35 parts of cement clinker, 30 to 40 parts of modified desulfurized ash, 15 to 25 parts of industrial waste gypsum, 20 to 30 parts of slag, and 0.5 to 1.5 parts of dispersant.

2. A curing agent for curing building debris as claimed in claim 1, characterized in that: The preparation method of the modified desulfurized ash is: 1) Desulfurized ash, manganese dioxide and triethanolamine are mixed in a mass ratio of 50:4-5:3-10 to form a grinding system, the grinding system is ground at a grinding speed of R, and after the grinding system rises to X, atomized water is sprayed to the grinding system to reduce the grinding system to Y, and this is repeated until 20-25% of the mass of the desulfurized ash is sprayed with atomized water, wherein R is 1000-1200rpm, X is 50-60°C, and Y is 25-30°C; 2) Then, 30-35% of the mass of the desulfurized ash is sprayed with hydrogen peroxide into the grinding system and stirred for 40-60 minutes, and then stirred for another 10-20 minutes to obtain modified desulfurized ash.

3. A curing agent for curing building debris as claimed in claim 2, characterized in that: The X and Y are affected by the grinding speed, specifically, satisfying the following formula: Among them, X0 is the actual heating temperature, Y0 is the actual cooling temperature, R0 is the actual grinding speed, R min is the minimum value of grinding speed, R max is the maximum value of grinding speed, X min is the minimum value of the heating temperature, Y max is the maximum value of the cooling temperature.

4. A curing agent for curing building debris as claimed in claim 1, characterized in that: The dispersant is added in an amount of 0.5 to 1.5 parts, and the dispersant is a mixture of dodecyl sulfonate and wood sulfonate in a mass ratio of 1:2 to 5.

5. A curing agent for curing building debris as claimed in claim 1, characterized in that: The industrial waste gypsum is added in an amount of 15 to 25 parts, and the industrial waste gypsum is one or more of titanium gypsum, phosphogypsum, and desulfurized gypsum.

6. The method for preparing a curing agent for curing building debris according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Curing agent ingredients: cement clinker, modified desulfurized ash, industrial waste gypsum, slag and dispersant are weighed according to the weight ratio for standby use; S2. Preparation of curing agent: Add cement clinker, modified desulfurization ash, industrial waste gypsum, slag and dispersant into a mixing device and stir for 5 to 10 minutes to obtain a curing agent after mixing.

7. The method for preparing a curing agent for curing building debris according to claim 6, characterized in that: In S2, the stirring temperature is controlled at 30-35°C, and after mixing, the mixture is naturally cooled to room temperature to obtain a curing agent.

8. The use of a curing agent for curing building debris as claimed in any one of claims 1 to 5, characterized in that: The curing agent is added into the base material of the road stabilization base in an amount of 5-15% by mass and mixed evenly to obtain soil material for the road stabilization base, wherein the base material is construction waste soil.

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