Preparation method of construction waste solidifying agent based on mixing method
The preparation of construction waste solidifying agent by mixing method solves the problems of high resource consumption and serious pollution of traditional materials, realizes the resource utilization of construction waste, enhances the strength and stability of road base, has good weather resistance and corrosion resistance, and promotes the green development of road engineering.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING QIANJING RESOURCES RECYCLING CO LTD
- Filing Date
- 2026-03-10
- Publication Date
- 2026-06-09
AI Technical Summary
Traditional road base reinforcement materials rely on natural lime, which leads to high resource consumption, serious pollution, and insufficient durability. How can we utilize construction waste resources to replace some natural materials and achieve road base reinforcement?
A construction waste solidification agent was prepared by a mixing method. The solidification agent was prepared by mixing finely powdered construction waste with specific cementing materials and additives in a certain proportion and then ball milling it. The cementing materials were prepared by a multi-step reaction to enhance the bonding performance.
It realizes the resource utilization of construction waste, reduces the dependence on natural lime, improves the strength and stability of the road base, extends the service life of the road, and has good weather resistance and corrosion resistance, thus promoting green and sustainable development.
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Abstract
Description
Technical Field
[0001] This invention relates to the field of building materials technology, specifically to a method for preparing building waste solidification agents based on a mixing method. Background Technology
[0002] With the rapid pace of urban construction and renovation, the amount of construction waste generated has increased dramatically. The large accumulation of this waste not only occupies land resources but also causes environmental pollution. In road base reinforcement projects, traditional techniques rely heavily on materials such as natural lime and cement. However, the mining of natural lime consumes large amounts of natural resources, and its production process is characterized by high energy consumption and pollution. Furthermore, traditional road base reinforcement materials have limitations in terms of durability and cost control. Therefore, how to utilize construction waste as a resource for road base reinforcement, replacing some natural materials and reducing resource consumption and environmental pollution, has become a key technical problem that needs to be solved in the field of road engineering. Summary of the Invention
[0003] To address the aforementioned technical problems, a method for preparing construction waste solidification agents based on a mixing method is provided, and this technical solution solves the problems mentioned above.
[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: Construction waste solidification agent based on the mixing method includes the following raw materials in parts by weight: The mixture consists of 60-80 parts of finely powdered construction waste, 15-30 parts of cementing material, and 5-10 parts of additives.
[0005] The method for preparing construction waste solidification agent based on the mixing method includes the following steps: Step 1: Weigh out 60-80 parts of the pulverized construction waste powder, 15-30 parts of the binder, and 5-10 parts of the additives according to the mass proportions. The second step is to add the crushed construction waste powder and binder to the mixer and dry mix for 6-11 minutes. After mixing evenly, add the additive to the mixture and continue to dry mix for 9-13 minutes to obtain the curing agent dry material. The third step is to ball mill the dry curing agent and pass it through a 250-mesh sieve to obtain the finished construction waste curing agent. Furthermore, the particle size of the fine powder of the pulverized construction waste is 0.1-5mm; Furthermore, the water-reducing agent in the admixture is a polycarboxylate-based water-reducing agent; Furthermore, the early-strength agent in the admixture is a calcium formate early-strength agent; Furthermore, the mixing speed of the mixer is 120-160 r / min; Furthermore, the ball milling treatment time is 2.5-3.5 hours; Furthermore, the adhesive material is prepared by the following steps: Step 1: Mix aluminate cement clinker, gypsum, grinding aid, alkaline activator and organic solvent in a reaction vessel, install a condenser and thermometer, turn on the stirring device, and react at 80-90℃ for 7-9 hours. After the reaction is completed, remove the organic solvent by vacuum distillation, and recrystallize the remaining solid to obtain intermediate 1. Step 2: Mix intermediate 1 and modifier in a reaction vessel, install a condenser and thermometer, turn on the stirring device, and react at 90-95℃ for 2.5h. After the reaction is completed, cool to room temperature by air cooling. Then pour the reaction solution into a saturated sodium chloride solution and centrifuge to separate the solid obtained, which is intermediate 2. Step 3: Add intermediate 2, alcohol-water solution and active mixture to the reaction vessel and react at 75-85℃ for 1.5h. After the reaction is completed, separate the active mixture and dry it at low temperature to obtain the cemented material. Furthermore, the ratio of aluminate cement clinker, gypsum, grinding aid, alkaline activator, and organic solvent used in step 1 is 30 mmol: 30 mmol: 25-27 mmol: 6-8 mmol: 55-65 mL; Furthermore, the concentration of the modifier used in step 2 is 12%, and the ratio of intermediate 1 to modifier is 22 mmol: 24-28 g; Furthermore, the volume fraction of the alcohol-water solution used in step 3 is 85%, and the ratio of intermediate 2, alcohol-water solution, and active mixed material is 9-11g:160mL:16g.
[0006] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention prepares a construction waste solidifying agent by crushing construction waste and mixing it with specific cementing materials and additives in a certain proportion. During the preparation process, the construction waste undergoes pretreatment, and the raw materials are precisely proportioned to ensure stable solidifying agent quality. This solidifying agent is applied to road base reinforcement, realizing the resource utilization of construction waste, reducing its accumulation and pollution, and simultaneously reducing reliance on traditional materials such as natural lime, effectively conserving natural resources and lowering production costs.
[0007] 2. This invention employs a specific process for preparing the cementing material, involving multiple reactions and treatments to ensure thorough bonding between the cementing material and the fine powder of construction waste, thereby enhancing the bonding performance of the curing agent. The prepared construction waste curing agent, when used in road base courses, significantly improves the strength and stability of the road base. Compared to traditional materials, its cured base structure is denser, has stronger compressive strength, effectively extends the service life of the road, and reduces subsequent road maintenance costs.
[0008] 3. The construction waste solidification agent prepared by this invention exhibits excellent weather resistance and corrosion resistance due to the synergistic effect of its components and process. When applied to road base layers, it can adapt to different climatic environments and soil conditions, reducing damage to the road base layer from external factors, ensuring the safety and reliability of roads during long-term use, and promoting green and sustainable development in the field of road engineering. Detailed Implementation
[0009] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0010] Example 1 The preparation steps of the construction waste solidification agent based on the mixing method are as follows: Step 1: Preparation of cementing material 30 mmol aluminate cement clinker, 30 mmol gypsum, 25 mmol grinding aid, 6 mmol alkaline activator, and 55 mL organic solvent were mixed in a reaction vessel, a condenser and a thermometer were installed, the stirring device was turned on, and the reaction was carried out at 80 °C for 7 h. After the reaction was completed, the organic solvent was removed by vacuum distillation, and the remaining solid was recrystallized to obtain intermediate 1. 15 mmol of intermediate 1 and 16 g of 12% concentration modifier were mixed in a reaction vessel, a condenser and a thermometer were installed, the stirring device was turned on, and the reaction was carried out at 90℃ for 2.5 h. After the reaction was completed, the mixture was cooled to room temperature by air cooling. Then the reaction solution was poured into a saturated sodium chloride solution and centrifuged. The solid obtained was intermediate 2. Add 5g of intermediate 2, 100mL of 85% alcohol-water solution, and 16g of active mixed material to a reaction vessel and react at 75℃ for 1.5h. After the reaction is completed, separate the active mixed material and obtain the cemented material by low-temperature drying.
[0011] Step 2: Preparation of curing agent Weigh out 60 parts by weight of fine construction waste powder with a particle size of 0.1-5mm after pulverization, 15 parts of the above-prepared cementitious material, and 5 parts of admixture (polycarboxylate superplasticizer and calcium formate early strength agent are composed of 1:1 mass ratio). Add the fine powder of construction waste and the binder to the mixer and dry mix at a stirring speed of 120 r / min for 6 minutes. After mixing evenly, add the additive to the mixture and continue to dry mix for 9 minutes to obtain the dry material of the curing agent. The dry curing agent was ball-milled for 2.5 hours and then passed through a 250-mesh sieve to obtain the finished construction waste curing agent.
[0012] Example 2 The preparation steps of the construction waste solidification agent based on the mixing method are as follows: Step 1: Preparation of cementing material 30 mmol aluminate cement clinker, 30 mmol gypsum, 26 mmol grinding aid, 7 mmol alkaline activator, and 58 mL organic solvent were mixed in a reaction vessel, a condenser and a thermometer were installed, the stirring device was turned on, and the reaction was carried out at 85 °C for 8 h. After the reaction was completed, the organic solvent was removed by vacuum distillation, and the remaining solid was recrystallized to obtain intermediate 1. 15 mmol of intermediate 1 and 18 g of 12% concentration modifier were mixed in a reaction vessel, a condenser and a thermometer were installed, the stirring device was turned on, and the reaction was carried out at 93℃ for 2.5 h. After the reaction was completed, the mixture was cooled to room temperature by air cooling. Then the reaction solution was poured into a saturated sodium chloride solution and centrifuged. The solid obtained was intermediate 2. 5.5g of intermediate 2, 100mL of 85% alcohol-water solution, and 16g of active mixed material were added to a reaction vessel and reacted at 78℃ for 1.5h. After the reaction was completed, the active mixed material was separated and dried at low temperature to obtain the cemented material.
[0013] Step 2: Preparation of curing agent Weigh out 70 parts by weight of fine construction waste powder with a particle size of 0.1-5mm after pulverization, 20 parts of the above-prepared cementitious material, and 7 parts of admixture (polycarboxylate superplasticizer and calcium formate early strength agent are composed in a 1:1 mass ratio). Add the fine powder of construction waste and the binder to the mixer and dry mix at a stirring speed of 140 r / min for 8 minutes. After mixing evenly, add the additive to the mixture and continue to dry mix for 11 minutes to obtain the dry material of the curing agent. The dry curing agent was ball-milled for 3 hours and then passed through a 250-mesh sieve to obtain the finished construction waste curing agent.
[0014] Example 3 The preparation steps of the construction waste solidification agent based on the mixing method are as follows: Step 1: Preparation of cementing material 30 mmol aluminate cement clinker, 30 mmol gypsum, 27 mmol grinding aid, 8 mmol alkaline activator, and 65 mL organic solvent were mixed in a reaction vessel, a condenser and a thermometer were installed, the stirring device was turned on, and the reaction was carried out at 90 °C for 9 h. After the reaction was completed, the organic solvent was removed by vacuum distillation, and the remaining solid was recrystallized to obtain intermediate 1. 15 mmol of intermediate 1 and 20 g of 12% modifier were mixed in a reaction vessel, a condenser and a thermometer were installed, the stirring device was turned on, and the reaction was carried out at 95°C for 2.5 h. After the reaction was completed, the mixture was cooled to room temperature by air cooling. The reaction solution was then poured into a saturated sodium chloride solution and centrifuged. The solid obtained was intermediate 2. 6g of intermediate 2, 100mL of 85% alcohol-water solution, and 16g of active mixed material were added to a reaction vessel and reacted at 85℃ for 1.5h. After the reaction was completed, the active mixed material was separated and dried at low temperature to obtain the cemented material.
[0015] Step 2: Preparation of curing agent Weigh out 80 parts by weight of fine construction waste powder with a particle size of 0.1-5mm after pulverization, 30 parts by weight of the above-prepared cementitious material, and 10 parts by weight of admixture (polycarboxylate superplasticizer and calcium formate early strength agent are composed in a 1:1 mass ratio). Add the fine powder of construction waste and the binder to the mixer and dry mix at a stirring speed of 160 r / min for 11 min. After mixing evenly, add the additive to the mixture and continue to dry mix for 13 min to obtain the dry material of the curing agent. The dry curing agent was ball-milled for 3.5 hours and then passed through a 250-mesh sieve to obtain the finished construction waste curing agent.
[0016] Experimental Example 1 To verify the effect of the construction waste solidification agent of the present invention on enhancing soil strength, the following experiment was conducted: Comparative Example 1: Take equal mass of soil without added solidifier and prepare test blocks in the same manner as in Examples 1-3 (pressed under the same pressure conditions to ensure that the density and other conditions of the test blocks are consistent).
[0017] The construction waste solidifying agents prepared in Examples 1-3 were mixed evenly with soil at a mass ratio of 1:10, and standard-sized test blocks were prepared under laboratory conditions. These test blocks, along with those from Comparative Example 3, were placed in a constant temperature and humidity curing chamber at 20±2℃ and relative humidity ≥95% for 7 days. Afterward, unconfined compressive strength tests were conducted using professional pressure testing equipment, in accordance with the "Test Procedures for Inorganic Binder Stabilized Materials in Highway Engineering". The test results are shown in the table below.
[0018] As can be seen from the data in the table, the unconfined compressive strength of the test blocks with the added construction waste solidification agent of the present invention is significantly improved compared with the test blocks without the added solidification agent, indicating that the construction waste solidification agent of the present invention can effectively enhance the strength of the soil.
[0019] Comparative Example 2 To further compare the effect of the cementing material on the performance of the curing agent, a comparative example 3 was set up: the cementing material used in Example 3 was replaced with ordinary cement, while the other raw materials and preparation steps remained unchanged, and a construction waste curing agent was prepared.
[0020] Following the method of Experimental Example 1, the curing agent prepared in Comparative Example 3 was mixed with soil at a mass ratio of 1:10 to form test blocks. Simultaneously, test blocks from Example 3 were prepared. Under the same curing conditions, the blocks were cured for 7 days, and unconfined compressive strength tests were conducted using the same testing equipment and standards. The results are shown in the table below:
[0021] As can be seen from the data in the table, the curing agent made using the cementing material prepared in this invention is more effective in enhancing soil strength than the curing agent made using ordinary cement as the cementing material.
[0022] Example 4 The preparation process of the construction waste solidification agent based on the mixing method is as follows: Step 1: Preparation of cementing material 30 mmol of aluminate cement clinker, 30 mmol of gypsum, 25 mmol of grinding aid, 6 mmol of alkaline activator, and 55 mL of organic solvent were placed in a reactor. A condenser and thermometer were installed, and the stirring device was started. The reaction was carried out at 80 °C for 7 hours. After the reaction was completed, the organic solvent was removed by vacuum distillation, and the remaining solid was recrystallized to obtain intermediate 1. 15 mmol of intermediate 1 and 16 g of 12% modifier were added to the reactor. The condenser and thermometer were reinstalled, and the stirring was started. The reaction was carried out at 90°C for 2.5 h. After the reaction was completed, the mixture was cooled to room temperature by air cooling. The reaction solution was then poured into a saturated sodium chloride solution and centrifuged. The resulting solid was intermediate 2. 5g of intermediate 2, 100mL of 85% (v / v) alcohol-water solution, and 16g of active mixed material were added to a reaction vessel and reacted at 75℃ for 1.5h. After the reaction was completed, the active mixed material was separated and dried at low temperature to obtain the cementitious material.
[0023] Step 2: Preparation of curing agent Weigh out 65 parts by weight of fine construction waste powder with a particle size of 0.1-5mm after pulverization, 18 parts by weight of the above-prepared cementitious material, and 6 parts by weight of admixture (of which the mass ratio of polycarboxylate superplasticizer and calcium formate early strength agent is 1:1). Fine powder of construction waste and binder are put into a mixer and dry-mixed at a stirring speed of 130r / min for 7 minutes. After the mixture is evenly mixed, the additives are added and dry-mixed for another 10 minutes to obtain the dry curing agent. The dry curing agent was ball-milled for 2.6 hours and passed through a 250-mesh sieve to obtain the final product of the construction waste curing agent.
[0024] Example 5 The specific preparation steps for a construction waste solidification agent based on a hybrid method are as follows: Step 1: Preparation of cementing material 30 mmol of aluminate cement clinker, 30 mmol of gypsum, 26 mmol of grinding aid, 7 mmol of alkaline activator, and 58 mL of organic solvent were mixed in a reactor, fitted with a condenser and a thermometer, and stirred. The mixture was reacted at 85 °C for 8 h. After the reaction was completed, the organic solvent was removed by vacuum distillation, and the remaining solid was recrystallized to obtain intermediate 1. 15 mmol of intermediate 1 and 18 g of 12% concentration modifier were placed in a reaction vessel, a condenser and a thermometer were installed, and stirring was started. The reaction was carried out at 93°C for 2.5 h. After the reaction was completed, the mixture was cooled to room temperature by air. Then, the reaction solution was poured into a saturated sodium chloride solution and centrifuged to obtain intermediate 2. 5.5 g of intermediate 2, 100 mL of 85% (v / v) alcohol-water solution, and 16 g of active mixed material were added to a reaction vessel and reacted at 78 °C for 1.5 h. After the reaction was completed, the active mixed material was separated and dried at low temperature to obtain the cemented material.
[0025] Step 2: Preparation of curing agent Weigh out 72 parts by weight of fine construction waste powder with a particle size of 0.1-5mm after pulverization, 22 parts of the above-mentioned cementing material, and 8 parts of admixture (polycarboxylate superplasticizer and calcium formate early strength agent in a mass ratio of 1:1). Add the fine powder of construction waste and the binder to the mixer and dry mix at 150 r / min for 9 min. After adding the additive, continue to dry mix for 12 min to obtain the dry material of the curing agent. The dry curing agent was ball-milled for 3.2 hours and passed through a 250-mesh sieve to obtain the finished construction waste curing agent.
[0026] Example 6 The preparation steps of the construction waste solidification agent based on the mixing method are as follows: Step 1: Preparation of cementing material 30 mmol of aluminate cement clinker, 30 mmol of gypsum, 27 mmol of grinding aid, 8 mmol of alkaline activator, and 65 mL of organic solvent were added to a reaction vessel. A condenser and thermometer were installed, and the stirring device was turned on. The reaction was carried out at 90 °C for 9 h. After the reaction was completed, the organic solvent was removed by vacuum distillation, and the remaining solid was recrystallized to obtain intermediate 1. 15 mmol of intermediate 1 and 20 g of 12% modifier were added to a reaction vessel, a condenser and a thermometer were installed, and stirring was started. The reaction was carried out at 95°C for 2.5 h. After the reaction was completed, the mixture was cooled to room temperature, poured into a saturated sodium chloride solution, and centrifuged to obtain intermediate 2. 6g of intermediate 2, 100mL of 85% (v / v) alcohol-water solution, and 16g of active mixed material were added to a reaction vessel and reacted at 85℃ for 1.5h. After the reaction was completed, the active mixed material was separated and dried at low temperature to obtain the cementitious material.
[0027] Step 2: Preparation of curing agent Weigh out 78 parts by weight of fine construction waste powder with a particle size of 0.1-5mm after crushing, 28 parts by weight of the above-mentioned cementing material, and 9 parts by weight of admixture (polycarboxylate superplasticizer and calcium formate early strength agent in a mass ratio of 1:1). Fine powder of construction waste and binder are put into a mixer and dry-mixed at 155 r / min for 10 min. After adding the additive, dry-mixing is continued for 12.5 min to obtain the dry material of the curing agent. The dry curing agent was ball-milled for 3.4 hours and passed through a 250-mesh sieve to obtain the finished construction waste curing agent.
[0028] Experiment Example 2 To investigate the effect of the construction waste solidification agent of this invention on the soil impermeability, the following experiments were conducted: Comparative Example 4: Take equal mass of soil of the same type without added curing agent and prepare standard-sized test blocks in the same manner as in Examples 4-6 (pressed under the same pressure conditions to ensure that the density and other conditions of the test blocks are consistent).
[0029] The construction waste solidifying agents prepared in Examples 4-6 were thoroughly mixed with soils of the same type at a mass ratio of 1:8. Standard-sized test blocks were then formed in professional molds. These test blocks, along with those from Comparative Example 4, were cured for 14 days in an environment with a temperature of 20±2℃ and a relative humidity ≥95%. After the curing period, the impermeability was tested using a permeameter according to the relevant requirements of the "Technical Specification for Building Foundation Treatment". The test results are shown in the table below.
[0030] As can be seen from the data in the table, the permeability coefficient of the test block with the added construction waste solidification agent of the present invention is significantly lower than that of the test block without the added solidification agent, indicating that the construction waste solidification agent of the present invention can effectively improve the impermeability of the soil and enhance its waterproofing ability.
[0031] Experimental Example 3 To comprehensively evaluate the performance of the construction waste solidification agent of this invention in actual road base layer applications, comparative experiments were conducted with traditional materials: Comparative Example 5: A road section with the same geological conditions and traffic flow as the test road sections in Examples 1-6 was selected and constructed using traditional road base materials (such as common road base reinforcement materials with natural lime and ordinary cement as the main components, and constructed according to the commonly used local mix proportions and construction techniques). This road section serves as Comparative Example 5.
[0032] The construction waste solidifying agents prepared in Examples 1-6 were used for road base construction on different road sections. For each example, a 100-meter test section was selected. After construction, at six months, one year, and two years after opening to traffic, pavement deflection values were measured on each section using pavement deflection testing equipment conforming to the "Specifications for Field Testing of Highway Subgrade and Pavement." During the testing process, consistent accuracy of the testing equipment, identical testing methods, and representative selection of testing points were ensured. The changes in the bearing capacity of the road base were evaluated, and the results are summarized in the table below:
[0033] The data in the table shows that the deflection values of the road base layer using the construction waste solidification agent of this invention are all lower than those of road sections using traditional materials at different traffic opening times, indicating that the solidification agent of this invention can effectively improve the load-bearing capacity and durability of the road base layer.
[0034] The above provides a detailed description of the preparation method of construction waste solidification agent based on the mixing method provided by the present invention. 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, including the best mode, and also to enable any person skilled in the art to practice the present invention, including manufacturing and using any device or system, and implementing any combination method. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be combined with each other in any way. The fact that these combinations are not described exhaustively in this specification is merely for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A construction waste solidification agent based on a hybrid method, characterized in that, The raw materials include the following parts by weight: The mixture consists of 60-80 parts of finely powdered construction waste, 15-30 parts of cementing material, and 5-10 parts of additives. The adhesive material is prepared by the following steps: Step 1: Mix aluminate cement clinker, gypsum, grinding aid, alkaline activator and organic solvent in a reaction vessel, install a condenser and thermometer, turn on the stirring device, and react at 80-90℃ for 7-9 hours. After the reaction is completed, remove the organic solvent by vacuum distillation, and recrystallize the remaining solid to obtain intermediate 1. Step 2: Mix intermediate 1 and modifier in a reaction vessel, install a condenser and thermometer, turn on the stirring device, and react at 90-95℃ for 2.5h. After the reaction is completed, cool to room temperature by air cooling. Then pour the reaction solution into a saturated sodium chloride solution and centrifuge to separate the solid obtained, which is intermediate 2. Step 3: Add intermediate 2, alcohol-water solution and active mixture to the reaction vessel and react at 75-85℃ for 1.5h. After the reaction is completed, separate the active mixture and obtain the cemented material by low-temperature drying.
2. The construction waste solidification agent based on the mixing method according to claim 1, characterized in that, The ratio of aluminate cement clinker, gypsum, grinding aid, alkaline activator, and organic solvent used in step 1 is 30 mmol: 30 mmol: 25-27 mmol: 6-8 mmol: 55-65 mL.
3. The construction waste solidification agent based on the mixing method according to claim 1, characterized in that, The concentration of the modifier used in step 2 is 12%, and the ratio of intermediate 1 to modifier is 22 mmol: 24-28 g.
4. The construction waste solidification agent based on the mixing method according to claim 1, characterized in that, The volume fraction of the alcohol-water solution used in step 3 is 85%, and the ratio of intermediate 2, alcohol-water solution, and active mixed material is 9-11g:160mL:16g.
5. A method for preparing a construction waste solidification agent based on a mixing method as described in any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Weigh out 60-80 parts of the pulverized construction waste powder, 15-30 parts of the binder, and 5-10 parts of the additives according to the mass proportions. The second step is to add the crushed construction waste powder and binder to the mixer and dry mix for 6-11 minutes. After mixing evenly, add the additive to the mixture and continue to dry mix for 9-13 minutes to obtain the curing agent dry material. The third step is to ball mill the dry curing agent and pass it through a 250-mesh sieve to obtain the finished construction waste curing agent.
6. The method for preparing construction waste solidification agent based on the mixing method according to claim 5, characterized in that, The particle size of the fine powder of the pulverized construction waste is 0.1-5mm.
7. The method for preparing construction waste solidification agent based on the mixing method according to claim 5, characterized in that, The water-reducing agent in the admixture is a polycarboxylate-based water-reducing agent.
8. The method for preparing construction waste solidification agent based on the mixing method according to claim 5, characterized in that, The early-strength agent in the admixture is calcium formate.
9. The method for preparing construction waste solidification agent based on the mixing method according to claim 5, characterized in that, The mixing speed of the mixer is 120-160 r / min.
10. The method for preparing construction waste solidification agent based on the mixing method according to claim 5, characterized in that, The ball milling process takes 2.5-3.5 hours.