Composite water stabilizing material and preparation method thereof

Abstract

The invention discloses a composite water stabilizing material and a preparation method thereof, and relates to the technical field of composite water stabilizing materials, and the preparation method comprises the following steps: selecting and preparing raw materials, debugging and maintaining equipment, uniformly mixing the raw materials, and spraying a soil stabilizer and a modifier. By adding the soil stabilizer, the strength, compactness, rebound modulus, deflection value and shear strength of soil can be remarkably improved, so that the service life of the composite water stabilizing material is prolonged, the engineering maintenance cost is saved, the contact surface between soil particles is improved mainly through physical and chemical reaction between the composite water stabilizing material and the soil particles, and the soil stability is improved. According to the present invention, the soil particles are added, the connection structure between the soil particles is reinforced, such that the engineering property of the soil is improved, the engineering strength can be improved, the good road performance such as stability, durability and crack resistance can be provided, the requirements of the high-grade road base can be met, the environmental influence can be effectively reduced, and the green sustainable development can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of composite water-stabilizing materials, and in particular to a composite water-stabilizing material and a preparation method thereof. Background Art

[0002] Composite water-stabilized material is a special concrete material, mainly used for foundation, ground and pavement structures in construction, highways, municipal roads, bridges and other projects. Its main components are cement and crushed stone of different particle sizes or solid waste cement block recycled materials, and are formed through scientific proportioning and the addition of certain additives. In highway construction, composite water-stabilized material is an ideal base material, which can provide higher strength, stiffness, stability, frost resistance and impermeability. With the continuous development of the national economy, highway construction has also developed rapidly, and pavement materials play a very important role in the durability of highways. As a new type of high-performance road material, composite water-stabilized material has received widespread attention and application. The following problems exist in the existing water-stabilized material:

[0003] 1. The existing water-stabilized materials have a narrow adjustable strength range, low tensile strength, large shrinkage coefficient, and are prone to shrinkage cracks, which may cause cracks in the structure during use, affecting the durability and safety of the structure. In areas with high traffic flow, water-stabilized materials may cause road damage due to low strength and large shrinkage coefficient, which may cause cracks and require frequent maintenance and renovation. Summary of the invention

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] The composite water-stabilized material and the preparation method thereof comprise the following steps:

[0006] Step 1: Raw material selection and preparation;

[0007] Step 2: Equipment debugging and maintenance;

[0008] Step 3: Mix the raw materials evenly;

[0009] Step 4: Spraying soil stabilizer and modifier.

[0010] A further improvement of the technical solution of the present invention is that: step one is to select a number of crushed stones or solid waste concrete block recycled materials, cement, soil solidifier, modifier, sprayer, mixer, paver, and prepare sufficient space for storing crushed stones or solid waste concrete block recycled materials, and step two is to carry out necessary debugging of the mixer and paver prepared in advance in step one to put them in good working condition to avoid malfunction during subsequent use.

[0011] A further improvement of the technical solution of the present invention is that: step three is to put the selected crushed stone or solid waste concrete block recycled material into a mixer, turn on the mixer for preliminary mixing, and the mixing time is 10 seconds to ensure that the material is fully mixed and evenly mixed, and then add cement to the mixer according to the designed ratio. The amount of cement added is determined according to experiments, and stirring is continued. During this process, close attention should be paid to the color and texture changes of the mixture to ensure that the cement is evenly distributed in the solid waste.

[0012] A further improvement of the technical solution of the present invention is that: in step 4, when the cement and crushed stone or solid waste concrete block recycled material mixture is stirred in step 3, a special sprayer is used to evenly spray the soil curing agent into the mixture, and the spraying speed should be kept uniform to ensure that the soil curing agent is evenly distributed in the mixture, and the external admixture amount of the soil curing agent is 0.012%-0.015%, and after the soil curing agent is sprayed, a modifier needs to be sprayed on the mixture. The modifier is a combination of montmorillonite, quartz powder, silane coupling agent and polyurethane, and is prepared through a specific chemical reaction process. It is evenly added to the mixture and continued to be stirred until the modifier and the mixture are fully fused.

[0013] A further improvement of the technical solution of the present invention is that the preparation of the modifier in step 4 comprises the following steps:

[0014] S1: adding dry montmorillonite and quartz powder to the polyether diol and stirring to form a suspension;

[0015] S2: under nitrogen protection, toluene diisocyanate and a catalyst were added to the suspension, and the temperature was gradually raised to 60° C. for reaction for 2 hours to obtain a prepolymer;

[0016] S3: After the prepolymer is cooled to 40°C, a small molecule chain extender and a silane coupling agent are added dropwise and reacted for 1 hour to obtain a modified polyurethane.

[0017] A further improvement of the technical solution of the present invention is that after the mixing is completed, the prepared composite water-stabilized material is taken out from the mixer, loaded into a heavy-duty transport vehicle, and transported to the construction site in a timely manner.

[0018] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0019] 1. The present invention provides a composite water-stabilizing material and a preparation method thereof. By adding a soil solidifier, the strength, density, rebound modulus, deflection value, shear strength and other properties of the soil can be significantly improved, thereby extending the service life of the composite water-stabilizing material and saving engineering maintenance costs. It is an ideal choice for road construction materials. It mainly improves the contact surface between soil particles and strengthens the connection structure between soil particles through physical and chemical reactions with soil particles, thereby improving the engineering properties of the soil.

[0020] 2. The present invention provides a composite water-based stabilizer and a preparation method thereof. The composite water-based stabilizer can improve the strength of the project. It not only has good road performance including stability, durability and crack resistance, but also can meet the requirements of high-grade highway base and effectively reduce environmental impact to achieve green and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a flow chart of the method for preparing the composite water-stabilizing material of the present invention;

[0022] Figure 2 The present invention is a flow chart for preparing the modifier. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with embodiments:

[0024] Example 1

[0025] like Figure 1-2 As shown, the present invention provides a composite water-stabilized material and a preparation method thereof, comprising the following steps:

[0026] Step 1: Raw material selection and preparation;

[0027] Step 2: Equipment debugging and maintenance;

[0028] Step 3: Mix the raw materials evenly;

[0029] Step 4: Spraying soil stabilizer and modifier.

[0030] Example 2

[0031] like Figure 1-2 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, step 1 is to select crushed stone or several solid waste concrete block recycled materials, cement, soil curing agent, modifier, sprayer, mixer, paver, and prepare enough containers for storing crushed stone or solid waste concrete block recycled materials, and step 2 is to perform necessary debugging on the mixer and paver prepared in advance in step 1 to put them in good working condition to avoid failure during subsequent use;

[0032] Step three is to put the selected solid waste concrete block recycled materials into the mixer and start the mixer for preliminary mixing. The mixing time is 10 seconds to ensure that the materials are fully mixed and evenly mixed. Then, cement is added to the mixer according to the designed proportion. The amount of cement added is determined according to the experiment. Continue to mix. During this process, pay close attention to the color and texture changes of the mixture to ensure that the cement is evenly distributed in the solid waste.

[0033] Step 4 is to use a special sprayer to evenly spray the soil solidifier into the mixture when mixing cement and crushed stone or solid waste concrete block recycled materials in step 3. The spraying speed should be kept uniform to ensure that the soil solidifier is evenly distributed in the mixture. The external admixture amount of the soil solidifier is 0.012%-0.015%, and after the soil solidifier is sprayed, the mixture needs to be sprayed with a modifier. This modifier is a combination of montmorillonite, quartz powder, silane coupling agent and polyurethane, prepared through a specific chemical reaction process. It is evenly added to the mixture and continued to be stirred until the modifier and the mixture are fully integrated.

[0034] In this embodiment, by using crushed stone or solid waste as raw materials, the damage to the environment caused by the mining of traditional building materials is effectively reduced, and at the same time, the recycling of waste is realized, reducing resource consumption, which can not only improve the stability of buildings and foundations, but also reduce damage caused by leakage, cracking and deformation, improve the functionality and practicality of buildings, and improve the stability and durability of the road base: by adding soil solidifiers, the performance of the composite water-stabilized material is significantly improved, so that it shows excellent stability and durability in the construction of the road base, and extends the service life of the road.

[0035] Example 3

[0036] like Figure 1-2 As shown, based on Example 1, the present invention provides a technical solution: Preferably, the preparation of the modifier in step 4 includes the following steps:

[0037] S1: adding dry montmorillonite and quartz powder to the polyether diol and stirring to form a suspension;

[0038] S2: under nitrogen protection, toluene diisocyanate and a catalyst were added to the suspension, and the temperature was gradually raised to 60° C. for reaction for 2 hours to obtain a prepolymer;

[0039] S3: After the prepolymer is cooled to 40°C, a small molecule chain extender and a silane coupling agent are added dropwise and reacted for 1 hour to obtain a modified polyurethane.

[0040] In this embodiment, the physical properties of the composite water-stabilized material can be enhanced by adding a modifier. The modifier can improve the strength, durability and stability of the composite water-stabilized material, and can also improve the construction performance of the composite water-stabilized material, making the construction more convenient by improving the adhesion and workability of the material.

[0041] Example 4

[0042] like Figure 1-2 As shown, based on Example 1, the present invention provides a technical solution: Preferably, after the stirring is completed, the prepared composite water-stabilized material is released from the storage hopper, loaded into a heavy-duty transport vehicle, and transported to the construction site in a timely manner.

[0043] In this embodiment, the uniformity of the mixture is improved, and stirring can ensure that all materials are fully mixed, reduce segregation, make the color and texture of the mixture more consistent, and reduce the amount of cement. By optimizing the stirring process, the amount of cement can be reduced while ensuring the performance of the mixture, thereby reducing costs and improving the stability and durability of the road base. The evenly mixed composite water-stabilized material can provide a more stable and durable road base, thereby extending the service life of the road.

[0044] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A method for preparing a composite water-stabilized material, characterized in that: The following steps are involved: Step 1: Raw material selection and preparation; Step 2: Equipment debugging and maintenance; Step 3: Mix the raw materials evenly; Step 4: Spraying soil stabilizer and modifier.

2. The method for preparing the composite water-stabilized material according to claim 1, characterized in that: The first step is to select a number of crushed stones or solid waste concrete block recycled materials, cement, soil solidifier, modifier, sprayer, mixer, paver, and prepare sufficient space for storing crushed stones or solid waste concrete block recycled materials. The second step is to perform necessary debugging on the mixer and paver prepared in advance in step one to put them in good working condition to avoid malfunction during subsequent use.

3. The method for preparing the composite water-stabilized material according to claim 2, characterized in that: The step three is to put the selected crushed stone or solid waste concrete block recycled material into the mixer, turn on the mixer for preliminary mixing, the mixing time is 10 seconds to ensure that the materials are fully mixed and evenly mixed, and then add cement to the mixer according to the designed ratio. The amount of cement added is determined according to experiments, and the mixing is continued. During this process, it is necessary to pay close attention to the color and texture changes of the mixture to ensure that the cement is evenly distributed in the solid waste.

4. The method for preparing the composite water-stabilized material according to claim 3, characterized in that: The fourth step is to use a special sprayer to evenly spray the soil curing agent into the mixture when the cement and solid waste concrete block recycled material mixture is stirred in step three. The spraying speed should be kept uniform to ensure that the soil curing agent is evenly distributed in the mixture. The external admixture amount of the soil curing agent is 0.012%-0.015%, and after the soil curing agent is sprayed, the mixture needs to be sprayed with a modifier. The modifier is a combination of montmorillonite, quartz powder, silane coupling agent and polyurethane, and is prepared through a specific chemical reaction process. It is evenly added to the mixture and continued to be stirred until the modifier and the mixture are fully integrated.

5. The method for preparing the composite water-stabilized material according to claim 4, characterized in that: The preparation of the modifier in step 4 comprises the following steps: S1: adding dry montmorillonite and quartz powder to the polyether diol and stirring to form a suspension; S2: under nitrogen protection, toluene diisocyanate and a catalyst were added to the suspension, and the temperature was gradually raised to 60° C. for reaction for 2 hours to obtain a prepolymer; S3: After the prepolymer is cooled to 40°C, a small molecule chain extender and a silane coupling agent are added dropwise and reacted for 1 hour to obtain a modified polyurethane.

6. The method for preparing the composite water-stabilized material according to claim 1, characterized in that: After the mixing is completed, the prepared composite water-stabilized material is released from the storage hopper, loaded into a heavy-duty transport vehicle, and transported to the construction site in a timely manner.

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