Engineering sludge soil artificial stone normal temperature composite curing agent and preparation method and application thereof

Abstract

The application discloses a preparation method of an engineering residual sludge soil artificial stone normal-temperature composite curing agent, and belongs to the field of curing agent preparation technology. The engineering residual sludge soil artificial stone normal-temperature composite curing agent comprises a liquid phase part, and is prepared by the following steps: preparing a curing agent base, and adding nano titanium dioxide into the curing agent base; and after sufficient stirring, a composite curing agent is formed. The mass ratio of the nano titanium dioxide to the curing agent base is 1%-2%. The curing agent base comprises a solvent and a curing agent. The curing agent is TBPB, TBPO and MEKP with a molar ratio of 1:0.2:(0.5-2). The mass percentage of the curing agent in the curing agent base is 45%-55%. Experimental results show that on one hand, the curing agent can be stably stored; when the temperature exceeds 35 DEG C and reaches 40 DEG C, the pressure in a storage bottle is kept stable; and on the other hand, when the curing agent is applied to artificial stone, the curing time is obviously shortened, the curing efficiency is high, and the compressive strength is obviously increased.

Description

Technical Field

[0001] This invention relates to the field of materials technology for soil and construction waste solidification, and in particular to a room-temperature composite solidifying agent for engineering waste soil and artificial stone, its preparation method and application. Background Technology

[0002] Construction waste, specifically excavated soil and slag, is a type of construction waste generated during construction projects due to human or natural causes. Many waste materials in construction waste can be reused as renewable resources after sorting, removal, or crushing. Currently, much of this construction waste and slag is reused to produce artificial stone. To achieve more efficient curing of the artificial stone, a curing agent is often added. In the prior art, Chinese invention patent application number CN201810073828.8 discloses a composite curing agent for artificial stone, comprising a curing agent and a solvent. The curing agent is composed of TBPB, TBPO, and MEKP, with a molar ratio of TBPB, TBPO, and MEKP of 1:(0.1-0.4):0.5, and the mass percentage of the curing agent is 45%-65%. However, in practical applications, when the storage temperature exceeds a critical value, the gas phase pressure in the storage container rises sharply, posing a safety hazard. Summary of the Invention

[0003] Based on this, the present invention provides a room temperature composite curing agent for artificial stone made from engineering waste soil and slag, as well as its preparation method and application. It solves the problem of instability of the curing agent at room temperature and improves the curing efficiency of artificial stone when applied to the manufacturing process.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0005] A method for preparing a room-temperature composite curing agent for artificial stone made from engineering waste sludge and slag includes the following steps: preparing a curing agent base material, adding nano-titanium dioxide to the curing agent base material, and stirring thoroughly to form a composite curing agent, wherein the nano-titanium dioxide accounts for 1%-2% of the mass of the curing agent base material, the curing agent base material includes a solvent and a curing agent, the curing agent is TBPB, TBPO, or MEKP with a molar ratio of 1:0.2:(0.5-2), and the mass percentage of the curing agent in the curing agent base material is 45%-55%.

[0006] Preferably, the curing agent is TBPB, TBPO, or MEKP in a molar ratio of 1:0.2:(1-1.7).

[0007] Preferably, the diameter of the nano-titanium dioxide is less than 100 nm.

[0008] Preferably, the solvent is dimethyl phthalate.

[0009] Preferably, the curing agent base material further includes tricalcium silicate, and the mass ratio of the curing agent to the tricalcium silicate is 1:(0.5-1).

[0010] A room-temperature composite curing agent for artificial stone made from engineering waste soil and slag is prepared by the above preparation method.

[0011] Application of a room-temperature composite curing agent for engineered sludge and waste soil in the production of artificial stone.

[0012] The technical solution adopted in this application can achieve the following beneficial effects:

[0013] A method for preparing a room-temperature composite curing agent for engineered stone made from excavated sludge and soil includes a curing agent base material. 1%-2% nano-titanium dioxide is added to the curing agent base material, and after thorough stirring, a composite curing agent is formed. Experiments have shown that, on the one hand, the curing agent can be stably stored; when the temperature exceeds 35℃ and reaches 40℃, the pressure inside the storage bottle remains stable. On the other hand, applying this curing agent to engineered stone improves the curing efficiency and stability of the engineered stone. Attached Figure Description

[0014] Figure 1 Line graph showing the temperature and pressure changes of curing agent A.

[0015] Figure 2 Line graphs showing the temperature and pressure changes of curing agents B and C with added titanium dioxide. Detailed Implementation

[0016] To facilitate understanding of this application, a more comprehensive description will be provided below with reference to relevant experimental examples. Preferred embodiments of this application are shown in the experimental examples. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and comprehensive understanding of the disclosure of this application.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] A method for preparing a room-temperature composite curing agent for artificial stone made from engineering waste sludge and slag includes the following steps: preparing a curing agent base material, adding nano-titanium dioxide to the curing agent base material, and stirring thoroughly to form a composite curing agent, wherein the nano-titanium dioxide accounts for 1%-2% of the mass of the curing agent base material, the curing agent base material includes a solvent and a curing agent, the curing agent is TBPB, TBPO, or MEKP with a molar ratio of 1:0.2:(0.5-2), and the mass percentage of the curing agent in the curing agent base material is 45%-55%.

[0019] The TBPB is tert-Butyl peroxybenzoate, CAS number: 614-45-9; the TBPO is tert-Butylperoxy-2-Ethylhecanoate, CAS number: 3006-82-4; and the MEKP is methyl ethyl ketone peroxide, CAS number: 1338-23-4.

[0020] In some specific embodiments, the curing agent is TBPB, TBPO, or MEKP in a molar ratio of 1:0.2:(1-1.7).

[0021] In some specific embodiments, the nano-titanium dioxide has a diameter of less than 100 nanometers and exhibits good dispersibility and weather resistance.

[0022] In some specific embodiments, the solvent is dimethyl phthalate, CAS number 131-11-3, which is an organic compound that is miscible with common organic solvents.

[0023] In some specific embodiments, the curing agent base material also includes tricalcium silicate, and the mass ratio of the curing agent to the tricalcium silicate is 1:(0.5-1). Both the curing agent base material and the tricalcium silicate have curing effects and can be used alone or added according to the process ratio, which can make the curing effect of artificial stone better.

[0024] The present invention will be further described below with reference to the embodiments.

[0025] Comparative Example 1

[0026] Curing agents were prepared using TBPB, TBPO, and MEKP in a molar ratio of 1:0.2:0.5, with a mass percentage of 45%. The solvent was dimethyl phthalate, resulting in curing agent A. The curing agents were stored in transparent glass bottles and brown glass bottles, respectively, labeled as curing agent A1 and curing agent A2. The gas phase pressures of curing agents A1 and A2 were measured at different storage temperatures. The experimental results are shown in Table 1.

[0027] Comparative Example 2

[0028] Based on Comparative Example 1, while keeping the temperature constant, the appearance of curing agents A1 and A2 was observed after 5, 10, 30, 60, and 90 days of storage. The experimental results are shown in Table 3.

[0029] Example 1

[0030] Curing agents were prepared using TBPB, TBPO, and MEKP in a molar ratio of 1:0.2:0.5, with a mass percentage of 45%. The solvent was dimethyl phthalate, and 1% nano-titanium dioxide (with a diameter of less than 100 nm) was added to obtain curing agent B. The curing agents were stored in transparent glass bottles and brown glass bottles, respectively. The transparent glass bottles were labeled as curing agent B1, and the brown glass bottles were labeled as curing agent B2. The storage temperature was changed, and the gas phase pressure of curing agents B1 and B2 was measured. The experimental results are shown in Table 2.

[0031] Example 2

[0032] Curing agents were prepared using TBPB, TBPO, and MEKP in a molar ratio of 1:0.2:0.5, with a mass percentage of 45%. The solvent was dimethyl phthalate, and 2% nano-titanium dioxide was added to obtain curing agent C. The curing agents were stored in transparent glass bottles and brown glass bottles, respectively. The transparent glass bottles were labeled as curing agent C1, and the brown glass bottles were labeled as curing agent C2. The storage temperature was changed, and the gas phase pressure of curing agents C1 and C2 was measured. The experimental results are shown in Table 2.

[0033] Example 3

[0034] Based on Examples 1 and 2, while keeping the temperature constant, the appearance of curing agents B1, B2, C1, and C2 was observed after 5, 10, 30, 60, and 90 days of storage. The experimental results are shown below.

[0035] Table 1. Temperature and Pressure Changes of Curing Agent A

[0036]

[0037] Table 2. Temperature and pressure changes of curing agents B and C with added titanium dioxide.

[0038]

[0039] Table 3. Changes in curing agent within 90 days.

[0040]

[0041] As shown in Tables 1 and 2, brown glass bottles are relatively more stable during storage.

[0042] As shown in Table 1, the pressure inside the bottle increases for both curing agents A1 and A2 at 30°C, and increases rapidly between 35°C and 40°C. This indicates that the pressure inside the curing agent bottle increases with increasing temperature, and further heating could lead to an explosion risk.

[0043] As shown in Tables 2 and 3, the pressure inside the curing agent bottles B1, B2, C1, and C2 with 1%-2% nano titanium dioxide added changes slowly with temperature. However, as shown in Table 3, with the extension of standing time, the curing agent changes from transparent to slightly turbid, becomes severely turbid after 30 days, develops flocculent material after 60 days, and shows stratification after 90 days.

[0044] Experiment Example 4

[0045] A method for preparing a room-temperature composite curing agent for engineered stone made from excavated sludge and soil includes the following steps:

[0046] The curing agent, prepared by mixing TBPB, TBPO, and MEKP in a molar ratio of 1:0.2:0.8, was poured into dimethyl phthalate as the solvent and mixed and stirred evenly at a stirring speed of 100 r / min for 15 min. Then, 1% nano titanium dioxide was added and mixed and stirred until uniform at a stirring speed of 80 r / min for 20 min to obtain curing agent D1.

[0047] Store the curing agent in a brown glass bottle at room temperature (25°C) and observe its appearance after 2, 10, 30, 60, 90, and 180 days.

[0048] Experimental Example 5

[0049] Keeping the other conditions of Experiment 4 unchanged, the molar ratio of TBPB, TBPO, and MEKP was changed to 1:0.2:1 to obtain curing agent D2.

[0050] Experimental Example 6

[0051] Keeping the other conditions of Experiment 4 unchanged, the molar ratio of TBPB, TBPO, and MEKP was changed to 1:0.2:1.4 to obtain curing agent D3.

[0052] Experimental Example 7

[0053] Keeping the other conditions of Experiment 4 unchanged, the molar ratio of TBPB, TBPO, and MEKP was changed to 1:0.2:1.7 to obtain curing agent D4.

[0054] Experimental Example 8

[0055] Keeping the other conditions of Experiment 4 unchanged, the molar ratio of TBPB, TBPO, and MEKP was changed to 1:0.2:2 to obtain curing agent D5.

[0056] Table 4. Changes in Molar Ratio

[0057]

[0058] Table 4 shows that when the molar ratio of TBPB, TBPO, and MEKP is 1:0.2:0.8, the curing agent composition shows slight turbidity after 10 days, flocculation after 60 days, and stratification after 90 days. When the molar ratio of TBPB, TBPO, and MEKP is changed to 1:0.2:1, flocculation occurs after 90 days, and stratification occurs after 180 days. Increasing the amount of MEKP significantly improves the curing agent's condition. Further increasing the amount of MEKP, as shown in Table 4, when the molar ratio of TBPB, TBPO, and MEKP is changed to 1:0.2:1.7, slight turbidity appears after 180 days. Further experiments show that when the molar ratio of TBPB, TBPO, and MEKP is changed to 1:0.2:2, the curing agent remains transparent, without flocculation or stratification, and it remains stable at room temperature over time.

[0059] The above-described embodiments merely illustrate the device deployment method of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, several adjustments and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for preparing a room-temperature composite curing agent for artificial stone made from engineering waste soil and slag, characterized in that, Includes the following steps: Prepare a curing agent base material, add nano-titanium dioxide to the curing agent base material, and stir thoroughly to form a composite curing agent. The nano-titanium dioxide accounts for 1%-2% of the mass of the curing agent base material. The curing agent base material includes a solvent and a curing agent. The curing agent is TBPB, TBPO, or MEKP with a molar ratio of 1:0.2:(0.5-2). The mass percentage of the curing agent in the curing agent base material is 45%-55%.

2. The preparation method of the room-temperature composite curing agent for artificial stone made from engineering waste soil as described in claim 1, characterized in that, The curing agent is TBPB, TBPO, or MEKP in a molar ratio of 1:0.2:(1-1.7).

3. The preparation method of the room-temperature composite curing agent for engineered stone made from engineering waste soil as described in claim 1, characterized in that, The diameter of the nano-titanium dioxide is less than 100 nm.

4. The preparation method of the room-temperature composite curing agent for artificial stone made from engineering waste soil as described in claim 1, characterized in that, The solvent is dimethyl phthalate.

5. The preparation method of the room-temperature composite curing agent for artificial stone made from engineering waste soil as described in claim 1, characterized in that, The curing agent base material also includes tricalcium silicate, and the mass ratio of the curing agent to the tricalcium silicate is 1:(0.5-1).

6. A room-temperature composite curing agent for artificial stone made from engineering waste soil and slag, characterized in that, Prepared by the method for preparing room temperature composite curing agent for engineering waste soil and artificial stone according to any one of claims 1-5.

7. The application of the room temperature composite curing agent for artificial stone made from engineering waste soil as described in claim 6 in the production of artificial stone.

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