Soil stabilizer for road surface layer pouring and preparation method thereof

Abstract

The invention discloses a soil stabilizer for road surface layer pouring. The soil stabilizer is prepared from the following raw materials in parts by weight: 20 to 30 parts of sodium silicate, 4 to 7 parts of polyacrylamide, 5 to 10 parts of sodium stearate, 4 to 6 parts of silane coupling agent KH560, 75 to 85 parts of cement, 2 to 5 parts of sodium chloride, 30 to 35 parts of water, 5 to 8 parts of coupling agent and 4 to 7 parts of alpha-aluminum oxide doped modifier. According to the soil stabilizer, sodium silicate and polyacrylamide are matched with sodium stearate, the silane coupling agent KH560, cement and other sodium chloride for blending, meanwhile, the coupling agent and the alpha-aluminum oxide doped modifier jointly achieve a synergistic effect, the strength performance of soil is optimized, and meanwhile the low-temperature strain performance and the Marshall stability effect of the product are remarkable.

Description

Technical Field

[0001] The invention relates to the technical field of soil solidifiers, and in particular to a soil solidifier used for pouring a road surface layer and a preparation method thereof. Background Art

[0002] Soil stabilizer is a new type of energy-saving and environmentally friendly geocomposite material that can be used to enhance or improve the engineering performance of soil. In engineering applications, usually only a certain amount of soil stabilizer is added according to the physical and chemical properties of the soil, and then after a series of mixing and compaction treatments, the engineering performance indicators of the soil can meet the specified requirements.

[0003] The existing soil solidifiers do not significantly improve the strength performance of the soil when used in the road surface layer. At the same time, the low-temperature strain and Marshall stability of the product are poor, which limits the use efficiency of the product. Based on this, the present invention further improves it. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a soil solidifying agent for road surface pouring and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution: The present invention provides a soil solidifying agent for road surface pouring, comprising the following raw materials in parts by weight: 20-30 parts of sodium silicate, 4-7 parts of polyacrylamide, 5-10 parts of sodium stearate, 4-6 parts of silane coupling agent KH560, 75-85 parts of cement, 2-5 parts of sodium chloride, 30-35 parts of water, 5-8 parts of coupling agent and 4-7 parts of modifier doped with α-alumina.

[0006] Preferably, the soil solidifying agent comprises the following raw materials in parts by weight: 25 parts of sodium silicate, 5.5 parts of polyacrylamide, 7.5 parts of sodium stearate, 5 parts of silane coupling agent KH560, 80 parts of cement, 3.5 parts of sodium chloride, 32.5 parts of water, 6.5 parts of coupling agent and 5.5 parts of modifier doped with α-alumina.

[0007] Preferably, the preparation method of the linking agent is: S1: Stir flaky talc powder thoroughly in a sufficient amount of 5% by mass hydrogen peroxide solution, then wash, filter and dry; Add 2-5 parts of silicon carbide and 1-3 parts of sodium alginate to 5-8 parts of sodium dodecylbenzene sulfonate solution, then add 3-5 parts of wollastonite, stir well, and obtain a synergist; S2: Stirring the dried flaky talc and the synergist in a weight ratio of 2:5, and completing the stirring to obtain a synergist flaky talc; S3: The combined effect flaky talc and the property adjusting agent are mixed and ball-milled in a weight ratio of 7:3. After the ball milling is completed, the mixture is filtered and dried to obtain the combined effect agent; The preparation method of the sexual regulator is as follows: 2-5 parts of lanthanum oxide, 1-3 parts of nano titanium dioxide and 2-3 parts of dopamine hydrochloride solution are fully mixed to obtain the sexual regulator.

[0008] Preferably, the mass fraction of the sodium dodecylbenzenesulfonate solution is 2-5%; the mass fraction of the dopamine hydrochloride solution is 4-7%.

[0009] Preferably, the mixing and ball milling treatment has a ball milling speed of 1000 r / min and the ball milling is performed for 1 hour, and the stirring treatment has a stirring speed of 550-750 r / min and the stirring is performed for 20 minutes.

[0010] Preferably, the preparation method of the modifier doped with α-alumina is: S11: irradiate a-alumina in a proton irradiation box for 1 hour at an irradiation power of 350-400W, and then the irradiation ends; The irradiated α-alumina is added to a urea solution of 2-5 times the total amount of the irradiated α-alumina, and then 10-15% of the total amount of the irradiated α-alumina is added to cerium oxide, and the mixture is mixed well to obtain an α-alumina liquid; S12: heat treating the nano-attapulgite at 150-160°C for 1 hour, then heating to 220°C at a rate of 1-3°C / min, keeping the temperature for 5 minutes, and finally air cooling to room temperature; 5-8 parts of α-alumina liquid and 2-4 parts of nano-attapulgite treated with S12 are mixed and ultrasonically treated, and then filtered and dried to obtain a modifier doped with α-alumina.

[0011] Preferably, the mass fraction of the urea solution is 2-5%.

[0012] Preferably, the ultrasonic power of the blending ultrasonic treatment is 350-400W, and the ultrasonic treatment is performed for 20 minutes.

[0013] The present invention also provides a method for preparing a soil solidifying agent for pouring a road surface layer, comprising the following steps: weighing raw materials according to weight parts, and mixing the raw materials thoroughly to obtain the soil solidifying agent of the present invention.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The soil solidifying agent of the present invention adopts sodium silicate, polyacrylamide, sodium stearate, silane coupling agent KH560 and sodium chloride such as cement to be blended, and a coupling agent and a modifier doped with α-alumina are synergistically effective to optimize the strength performance of the soil, and the low-temperature strain and Marshall stability of the product are significantly effective, the coupling agent adopts flaky talcum powder to optimize the activity through hydrogen peroxide solution, and is further blended and coordinated with a coupling agent, and silicon carbide, sodium alginate, sodium dodecylbenzene sulfonate solution and wollastonite in the coupling agent are synergistically effective to further improve the properties of the flaky talcum powder. Coordination effect, and further coordination improvement is achieved by using property adjusters. The lanthanum oxide, nano titanium dioxide and dopamine hydrochloride solution in the property adjusters are co-blended to further optimize and improve the product system, and thus the performance of the product is further improved. At the same time, the modifier doped with α-alumina takes α-alumina as the matrix, coordinated with urea solution and cerium oxide for coordination improvement, and nano-attapulgite is thermally improved and optimized together, and then the modifier doped with α-alumina and the linking agent are further coordinated and synergistic, so that the performance of the product is further improved. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] Example 1. A soil solidifying agent for road surface pouring in this embodiment includes the following raw materials in parts by weight: 20 parts of sodium silicate, 4 parts of polyacrylamide, 5 parts of sodium stearate, 4 parts of silane coupling agent KH560, 75 parts of cement, 2 parts of sodium chloride, 30 parts of water, 5 parts of coupling agent and 4 parts of modifier doped with α-alumina.

[0017] The preparation method of the linking agent of this embodiment is: S1: Stir flaky talc powder thoroughly in a sufficient amount of 5% by mass hydrogen peroxide solution, then wash, filter and dry; Add 2 parts of silicon carbide and 1 part of sodium alginate to 5 parts of sodium dodecylbenzene sulfonate solution, then add 3 parts of wollastonite, stir thoroughly, and obtain a synergist; S2: Stirring the dried flaky talc and the synergist in a weight ratio of 2:5, and completing the stirring to obtain a synergist flaky talc; S3: The combined effect flaky talc and the property adjusting agent are mixed and ball-milled in a weight ratio of 7:3. After the ball milling is completed, the mixture is filtered and dried to obtain the combined effect agent; The preparation method of the sexual regulator is as follows: Mix 2 parts of lanthanum oxide, 1 part of nano-titanium dioxide and 2 parts of dopamine hydrochloride solution thoroughly to obtain the sexual regulator.

[0018] In this embodiment, the mass fraction of the sodium dodecylbenzenesulfonate solution is 2%; the mass fraction of the dopamine hydrochloride solution is 4%.

[0019] In this embodiment, the ball milling speed for the mixing and ball milling treatment is 1000 r / min, the ball milling time is 1 h, the stirring speed for the stirring treatment is 550 r / min, and the stirring time is 20 min.

[0020] The preparation method of the modifier doped with a-aluminum oxide in this embodiment is as follows: S11: Irradiate a-aluminum oxide in a proton irradiation box for 1 h with an irradiation power of 350 W, and the irradiation ends; Add the irradiated a-aluminum oxide to a urea solution that is 2 times the total amount of the irradiated a-aluminum oxide, and then add 10% of cerium oxide based on the total amount of the irradiated a-aluminum oxide, and mix thoroughly to obtain an a-aluminum oxide solution; S12: Heat-treat nano-attapulgite at 150 °C for 1 h, then heat it up to 220 °C at a rate of 1 °C / min, keep it warm for 5 min, and finally air-cool it to room temperature; Mix 5 parts of the a-aluminum oxide solution and 2 parts of the nano-attapulgite treated in S12, perform ultrasonic treatment, then filter and dry to obtain the modifier doped with a-aluminum oxide.

[0021] In this embodiment, the mass fraction of the urea solution is 2%.

[0022] In this embodiment, the ultrasonic power for the mixing and ultrasonic treatment is 350 W, and the ultrasonic treatment time is 20 min.

[0023] The production method of the soil stabilizer for road surface pouring in this embodiment includes the following steps: Weigh the raw materials according to parts by weight, and mix the raw materials thoroughly to obtain the soil stabilizer of the present invention.

[0024] Example 2. A soil stabilizer for road surface pouring in this embodiment includes the following raw materials in parts by weight: 30 parts of sodium silicate, 7 parts of polyacrylamide, 10 parts of sodium stearate, 6 parts of silane coupling agent KH560, 85 parts of cement, 5 parts of sodium chloride, 35 parts of water, 8 parts of coupling agent, and 7 parts of modifier doped with a-aluminum oxide.

[0025] The preparation method of the coupling agent in this embodiment is as follows: S1: Stir flaky talc powder thoroughly in a sufficient amount of 5% hydrogen peroxide solution, then wash with water, filter and dry; Add 5 parts of silicon carbide and 3 parts of sodium alginate to 8 parts of sodium dodecylbenzene sulfonate solution, then add 5 parts of wollastonite, stir thoroughly, and obtain a synergist; S2: Stirring the dried flaky talc and the synergist in a weight ratio of 2:5, and completing the stirring to obtain a synergist flaky talc; S3: The combined effect flaky talc and the property adjusting agent are mixed and ball-milled in a weight ratio of 7:3. After the ball milling is completed, the mixture is filtered and dried to obtain the combined effect agent; The preparation method of the sexual adjuster is as follows: 5 parts of lanthanum oxide, 3 parts of nano titanium dioxide and 3 parts of dopamine hydrochloride solution are fully mixed to obtain the sexual adjuster.

[0026] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 5%; the mass fraction of the dopamine hydrochloride solution is 7%.

[0027] In the present embodiment, the ball milling speed of the mixing ball milling treatment is 1000 r / min, and the ball milling is performed for 1 hour. The stirring speed of the stirring treatment is 750 r / min, and the stirring is performed for 20 minutes.

[0028] The preparation method of the modifier doped with α-alumina in this embodiment is: S11: irradiate a-alumina in a proton irradiation box for 1 hour at an irradiation power of 400 W, and then the irradiation ends; The irradiated α-alumina is added to a urea solution of 5 times the total amount of the irradiated α-alumina, and then cerium oxide of 15% of the total amount of the irradiated α-alumina is added, and the mixture is mixed well to obtain an α-alumina liquid; S12: heat treating the nano-attapulgite at 160°C for 1 hour, then heating to 220°C at a rate of 3°C / min, keeping the temperature for 5 minutes, and finally air cooling to room temperature; 8 parts of α-alumina liquid and 4 parts of nano-attapulgite treated with S12 were mixed and ultrasonically treated, and then filtered and dried to obtain a modifier doped with α-alumina.

[0029] The mass fraction of the urea solution in this embodiment is 5%.

[0030] The ultrasonic power of the blending ultrasonic treatment in this embodiment is 400W, and the ultrasonic treatment is performed for 20 minutes.

[0031] The method for preparing the soil solidifying agent for road surface pouring of the present embodiment comprises the following steps: weighing raw materials according to weight parts, and mixing the raw materials thoroughly to obtain the soil solidifying agent of the present invention.

[0032] Example 3. A soil solidifying agent for road surface pouring in this embodiment includes the following raw materials in parts by weight: 25 parts of sodium silicate, 5.5 parts of polyacrylamide, 7.5 parts of sodium stearate, 5 parts of silane coupling agent KH560, 80 parts of cement, 3.5 parts of sodium chloride, 32.5 parts of water, 6.5 parts of coupling agent and 5.5 parts of modifier doped with α-alumina.

[0033] The preparation method of the linking agent of this embodiment is: S1: Stir flaky talc powder thoroughly in a sufficient amount of 5% by mass hydrogen peroxide solution, then wash, filter and dry; 3.5 parts of silicon carbide and 2 parts of sodium alginate are added to 6.5 parts of sodium dodecylbenzene sulfonate solution, followed by 4 parts of wollastonite, and stirred thoroughly to obtain a synergist; S2: Stirring the dried flaky talc and the synergist in a weight ratio of 2:5, and completing the stirring to obtain a synergist flaky talc; S3: The combined effect flaky talc and the property adjusting agent are mixed and ball-milled in a weight ratio of 7:3. After the ball milling is completed, the mixture is filtered and dried to obtain the combined effect agent; The preparation method of the sexual adjuster is as follows: 3.5 parts of lanthanum oxide, 2 parts of nano titanium dioxide and 2.5 parts of dopamine hydrochloride solution are fully mixed to obtain the sexual adjuster.

[0034] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 3.5%; the mass fraction of the dopamine hydrochloride solution is 5.5%.

[0035] In the present embodiment, the ball milling speed of the mixing ball milling treatment is 1000 r / min, and the ball milling is performed for 1 hour. The stirring speed of the stirring treatment is 600 r / min, and the stirring is performed for 20 minutes.

[0036] The preparation method of the modifier doped with α-alumina in this embodiment is: S11: irradiate a-alumina in a proton irradiation box for 1 hour at an irradiation power of 375W, and then the irradiation ends; The irradiated α-alumina was added to a urea solution of 3.5 times the total amount of the irradiated α-alumina, and then cerium oxide of 12.5% of the total amount of the irradiated α-alumina was added, and the mixture was mixed thoroughly to obtain an α-alumina liquid; S12: heat treating the nano-attapulgite at 155°C for 1 hour, then heating to 220°C at a rate of 2°C / min, keeping the temperature for 5 minutes, and finally air cooling to room temperature; 6.5 parts of α-alumina liquid and 3 parts of nano-attapulgite treated with S12 were blended and ultrasonically treated, and then filtered and dried to obtain a modifier doped with α-alumina.

[0037] The mass fraction of the urea solution in this embodiment is 3.5%.

[0038] The ultrasonic power of the blending ultrasonic treatment in this embodiment is 375W, and the ultrasonic treatment is carried out for 20 minutes.

[0039] The method for preparing the soil solidifying agent for road surface pouring of the present embodiment comprises the following steps: weighing raw materials according to weight parts, and mixing the raw materials thoroughly to obtain the soil solidifying agent of the present invention.

[0040] Comparative Example 1. The difference from Example 3 is that no cross-linking agent is added.

[0041] Comparative Example 2. The difference from Example 3 is that no synergist is added during the preparation of the synergist.

[0042] Comparative Example 3. The difference from Example 3 is that wollastonite and silicon carbide are not added to the synergist.

[0043] Comparative Example 4. The difference from Example 3 is that no sexual adjustment is added.

[0044] Comparative Example 5. The difference from Example 3 is that no lanthanum oxide or nano titanium dioxide is added to the property adjustment agent.

[0045] Comparative Example 6. The difference from Example 3 is that no modifier for doping α-alumina is added.

[0046] Comparative Example 7. The difference from Example 3 is that the nano-attapulgite treated with S12 is not added in the preparation of the modifier doped with α-alumina.

[0047] The products of Examples 1-3 of the present invention and Comparative Examples 1-7 were added to the soil at a weight ratio of 2:7 and cured for 24 hours. A tensile test was performed using an adhesive strength tester to test the adhesive strength. The performance test is as follows.

[0048]

[0049] It can be seen from Examples 1-3 and Comparative Examples 1-7 that the products of the present invention have excellent Marshall stability, -10°C low-temperature bending strain and bonding strength, and the combination of a linking agent and a modifier doped with α-alumina has significant advantages in improving the performance of the product; no synergist was added in the preparation of the linking agent, wollastonite and silicon carbide were added to the synergist, no property adjuster was added, lanthanum oxide and nano-titanium dioxide were not added to the property adjuster, and nano-attapulgite treated with S12 was not added in the preparation of the modifier doped with α-alumina. The performance of the products all tended to deteriorate to varying degrees. The product raw material obtained by the specific method of the present invention had the most significant performance effect, and other methods were not as obvious as the effect of the present invention.

[0050] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

[0051] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A soil stabilizer for road surface pouring, characterized in that, It includes the following raw materials in parts by weight: 20-30 parts of sodium silicate, 4-7 parts of polyacrylamide, 5-10 parts of sodium stearate, 4-6 parts of silane coupling agent KH560, 75-85 parts of cement, 2-5 parts of sodium chloride, 30-35 parts of water, 5-8 parts of coupling agent and 4-7 parts of modifier doped with α-alumina.

2. The soil stabilizer for road surface pouring according to claim 1, characterized in that The soil solidifying agent comprises the following raw materials in parts by weight: 25 parts of sodium silicate, 5.5 parts of polyacrylamide, 7.5 parts of sodium stearate, 5 parts of silane coupling agent KH560, 80 parts of cement, 3.5 parts of sodium chloride, 32.5 parts of water, 6.5 parts of coupling agent and 5.5 parts of modifier doped with α-alumina.

3. The soil stabilizer for road surface pouring according to claim 2, wherein, The preparation method of the linking agent is: S1: Stir flaky talc powder thoroughly in a sufficient amount of 5% by mass hydrogen peroxide solution, then wash, filter and dry; Add 2-5 parts of silicon carbide and 1-3 parts of sodium alginate to 5-8 parts of sodium dodecylbenzene sulfonate solution, then add 3-5 parts of wollastonite, stir well, and obtain a synergist; S2: Stirring the dried flaky talc and the synergist in a weight ratio of 2:5, and completing the stirring to obtain a synergist flaky talc; S3: The combined effect flaky talc and the property adjusting agent are mixed and ball-milled in a weight ratio of 7:

3. After the ball milling is completed, the mixture is filtered and dried to obtain the combined effect agent; The preparation method of the sexual regulator is as follows: 2-5 parts of lanthanum oxide, 1-3 parts of nano titanium dioxide and 2-3 parts of dopamine hydrochloride solution are fully mixed to obtain the sexual regulator.

4. The soil stabilizer for road surface pouring according to claim 3, characterized in that, The mass fraction of the sodium dodecylbenzenesulfonate solution is 2-5%; the mass fraction of the dopamine hydrochloride solution is 4-7%.

5. The soil stabilizer for road surface pouring according to claim 3, characterized in that, The mixing and ball milling treatment was performed at a ball milling speed of 1000 r / min for 1 hour, and the stirring treatment was performed at a stirring speed of 550-750 r / min for 20 minutes.

6. The soil stabilizer for road surface pouring according to claim 3, wherein The preparation method of the modifier doped with α-alumina is: S11: irradiate a-alumina in a proton irradiation box for 1 hour at an irradiation power of 350-400W, and then the irradiation ends; The irradiated α-alumina is added to a urea solution of 2-5 times the total amount of the irradiated α-alumina, and then 10-15% of the total amount of the irradiated α-alumina is added to cerium oxide, and the mixture is mixed well to obtain an α-alumina liquid; S12: heat treating the nano-attapulgite at 150-160°C for 1 hour, then heating to 220°C at a rate of 1-3°C / min, keeping the temperature for 5 minutes, and finally air cooling to room temperature; 5-8 parts of α-alumina liquid and 2-4 parts of nano-attapulgite treated with S12 are mixed and ultrasonically treated, and then filtered and dried to obtain a modifier doped with α-alumina.

7. The soil stabilizer for road surface pouring according to claim 6, characterized in that, The mass fraction of the urea solution is 2-5%.

8. The soil stabilizer for road surface pouring according to claim 6, characterized in that The ultrasonic power of the blending ultrasonic treatment is 350-400W, and the ultrasonic treatment lasts for 20 minutes.

9. A method for preparing a soil stabilizer for road surface pouring according to any one of claims 1-8, characterized in that, The method comprises the following steps: weighing raw materials according to weight portions, and mixing the raw materials sufficiently to obtain the soil solidifying agent of the invention.

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