A curing binder for a mixture of Yellow River sediment and stone powder and its application

Abstract

This invention relates to a curing and bonding agent for a mixture of Yellow River silt and stone powder and its application. By weight percentage, it comprises 5-10% polyethylene acrylate, 5-10% hydroxyethyl polyacrylamide compound, 5-10% polyethylene-grafted maleic acid polyethylene acrylate, 1-10% natural adhesive, and the balance being modified water glass. The polyethylene acrylate is either single-sided or double-sided. This invention uses inexpensive and readily available raw materials and a simple and effective synthesis process to prepare a high-performance organic polymer soil curing agent. This curing agent exhibits excellent water erosion resistance and has high application value. The Yellow River silt and stone powder mixture building material of this invention has high strength and a glossy surface, and can be used as an interior decoration material. It achieves the functions of plastic products while using Yellow River silt and stone powder to replace adhesives in plastic products, resulting in cost savings and environmental benefits.

Description

Technical Field

[0001] This invention relates to the field of building material curing agents, and in particular to a curing and cohesive agent for a mixture of Yellow River silt and stone powder and its application. Background Technology

[0002] Yellow River sediment is a type of quartz and feldspar mineral gravel, mainly deposited in the middle and lower reaches of the Yellow River. Its increasing volume is causing riverbed rise and seriously endangering surrounding safety. With the continuous development of the economy along the Yellow River, the gap in the sand and gravel market is widening, and the resource attributes and value of Yellow River sediment are gradually becoming apparent. The production process of manufactured sand or aggregates generates 10%–20% stone powder with a particle size smaller than 75μm. The stone powder content in manufactured sand does not exceed 10%. Excess stone powder is often collected by air classifiers and dust collectors and stored in waste stone powder silos. Only a small amount of recycled stone powder is used for brick making or as cement admixtures; most is stockpiled or buried in gullies, resulting in resource waste and serious environmental impact. Yellow River sediment and stone powder can be added in small quantities to concrete; therefore, the current utilization rate of stone powder and Yellow River sediment is low. Summary of the Invention

[0003] This invention provides a curing binder for a mixture of Yellow River sediment and stone powder and its application, which solves the problems of low utilization rate of stone powder and Yellow River sediment in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A curing and bonding agent for a mixture of Yellow River sediment and stone powder comprises, by weight percentage, 5-10% polyethylene acrylate, 5-10% hydroxyethyl polyacrylamide compound, 5-10% polyethylene-grafted maleic acid polyethylene acrylate, 1-10% natural adhesive, and the balance being modified water glass; wherein the polyethylene acrylate is a single-sided polyethylene acrylate or a double-sided polyethylene acrylate.

[0006] The chemical formula of unilateral polyethylene acrylate is as follows:

[0007]

[0008] Where: n = 30 ~ 7000, x = 4 ~ 300;

[0009] The chemical formula of the double-sided polyethylene acrylate is as follows:

[0010]

[0011] Where n = 30 to 7000, x = 4 to 300;

[0012] The chemical formula of the hydroxyethyl polyacrylamide compound is as follows:

[0013]

[0014] Where n = 30 to 7000;

[0015] The chemical formula of the polyethylene grafted with maleic acid polyethylene glycol ester is as follows:

[0016]

[0017] Where n = 10 to 300, x = 1 to 100.

[0018] Furthermore, preferably, the preparation method of the aforementioned single-sided polyethylene acrylate is as follows:

[0019]

[0020] Thionyl chloride was added to polyacrylic acid, the temperature was raised to 90°C, and the mixture was stirred for 2 hours. Excess thionyl chloride was evaporated off, and a small amount of toluene was added to continue evaporating the residual thionyl chloride in the system, yielding a pale yellow acyl chloride solid product. The reactants were dried under vacuum and dissolved in dry CH2Cl2. A CH2Cl2 solution of polyethylene glycol and triethylamine was added dropwise under ice bath conditions, and the mixture was stirred overnight at room temperature. The reaction solution was washed with dilute hydrochloric acid (1N) and water, and the organic phase was dried with anhydrous Na2SO4 and the solvent was removed under reduced pressure. The product was obtained by recrystallization from CH2Cl2 / Et2O.

[0021] Furthermore, preferably, the preparation method of the aforementioned double-sided polyethylene acrylate is as follows:

[0022]

[0023] Polyethylene glycol and p-toluenesulfonic acid were added to a toluene solution of polyacrylic acid, the mixture was heated to reflux and water was separated using a water separator, and the reaction was carried out overnight. After distilling off the toluene, CH2Cl2 was added, the mixture was washed with water and dried over anhydrous Na2SO4, and the solvent was removed under reduced pressure. After washing with diethyl ether, the double-sided polyethylene acrylate product was obtained.

[0024] Furthermore, preferably, the preparation method of the hydroxyethyl polyacrylamide compound is as follows:

[0025]

[0026] Thionyl chloride was added to polyacrylic acid, the temperature was raised to 90°C, and the mixture was stirred for 2 hours. Excess thionyl chloride was evaporated off, and a small amount of toluene was added to continue evaporating the residual thionyl chloride in the system, yielding a pale yellow acyl chloride solid product. Under nitrogen protection, the THF solution of the obtained acyl chloride was added dropwise to a THF solution of 2-aminoethanol and triethylamine, and the mixture was stirred at room temperature for 30 minutes. The mixture was filtered, and the obtained solid was washed with n-hexane and diethyl ether, and then recrystallized from CHCl3 / MeOH to obtain a hydroxyethylamide compound.

[0027] Furthermore, preferably, the preparation method of the aforementioned polyethylene grafted with maleic acid polyethylene glycol ester is as follows:

[0028]

[0029] Add p-toluenesulfonic acid to a xylene solution of maleic anhydride-grafted polyethylene and polyethylene glycol or methoxy polyethylene glycol, heat to reflux and separate water using a water separator, and react overnight; when the reaction system is naturally cooled to 100°C, pour it into ethanol and stir for 1 hour; filter, wash the obtained solid with diethyl ether, and dry under vacuum to obtain a white solid product.

[0030] Furthermore, preferably, the natural adhesive is one or a mixture of more than one of plant gums, rosin, and bitumen.

[0031] Furthermore, preferably: modified water glass solution refers to water glass (sodium silicate, Na2SiO3·nH2O, potassium silicate K2SiO3·nH2O, lithium silicate Li2SiO3·nH2O) that has been modified by adding a certain amount of alkaline reagents such as sodium hydroxide (the amount added depends on the specific modulus requirement) to commercially available industrial water glass. Its modulus (the ratio of SiO2 to X2O in water glass, where X is Na, K, or Li) is Ms = 1.5-2.5.

[0032] The curing binder of the present invention is used for the curing of Yellow River sediment.

[0033] The present invention also provides a building material made of Yellow River silt and stone powder, comprising, by weight, 20-80 parts of solid components and 20-80 parts of the curing binder as described in any one of claims 1-7, wherein the solid components, by weight percentage, comprise 75-85% stone powder, 10-20% Yellow River silt, and 1-5% quicklime.

[0034] The preparation method of the building material made from a mixture of Yellow River silt and stone powder of the present invention includes the following steps:

[0035] (1) First, mix the stone powder, quicklime and mud and sand solid mixture together, stir for 5-10 minutes at a speed of 200-300 r / min, and mix them evenly for later use.

[0036] (2) Then add the well mixed solid mixture to the curing adhesive while stirring at a speed of 200-300 r / min. After stirring evenly, shape and dry to obtain the Yellow River silt and stone powder mixed building material.

[0037] The beneficial effects of this invention are:

[0038] The curing binder prepared in this invention connects Yellow River silt and stone powder particles through hydrogen bonds and van der Waals forces formed between hydrophilic groups such as amino and hydroxyl groups in its polymer chain and soil particles. The C=O double bonds also connect Yellow River silt and stone powder through ionic coupling / coordination or hydrogen bonding with minerals in the raw materials, thus achieving a curing effect. After the curing binder of this invention binds to the raw material particles through weak interactions, the particle size of the raw materials increases significantly. The raw material particles remain aggregated and bound together due to flocculation, thereby forming agglomerates. The formation of agglomerates further increases the average particle size and alters the particle size distribution of the raw materials.

[0039] This invention uses inexpensive and readily available raw materials to prepare a high-performance organic polymer soil solidifier through a simple and effective synthesis process. This solidifier has excellent water erosion resistance and high application value.

[0040] The building material made from a mixture of Yellow River silt and stone powder of this invention has high strength and a glossy surface. It can be used as an interior decoration material, achieving the functions of plastic products while using Yellow River silt and stone powder to replace the adhesives in plastic products, thus saving costs and being environmentally friendly. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 The NMR spectrum of unilateral polyethylene acrylate;

[0043] Figure 2 The NMR spectrum of the hydroxyethyl polyacrylamide compound is shown.

[0044] Figure 3 The NMR spectrum is for polyethylene grafted with maleic acid polyethylene glycol ester.

[0045] Figure 4 This is a 1000x magnified electron microscope image of the solidified Yellow River sediment from Example 6.

[0046] Figure 5Figures showing the mixed building materials prepared for different embodiments. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] The preparation method of the raw materials used in this invention is as follows:

[0049] The preparation method of the single-sided polyethylene acrylate is as follows:

[0050]

[0051] At 0°C, thionyl chloride (60 mmol) was added dropwise to a suspension of polyacrylic acid (molecular weight 3500) (15 mmol) in CHCl3 (100 mL), the temperature was raised to 90°C, and the mixture was stirred for 2 h. Excess thionyl chloride was evaporated off, and a small amount of toluene was added to continue evaporating the remaining thionyl chloride in the system, yielding a pale yellow acyl chloride solid product. The reactants were dried under vacuum and dissolved in dry CH2Cl2 (100 mL), and a CH2Cl2 solution of polyethylene glycol (PEG4000) (130 mmol) and triethylamine (15 mmol) was added dropwise under ice bath, and the mixture was stirred overnight at room temperature. The reaction solution was washed with dilute hydrochloric acid (1N) and water, and the organic phase was dried with anhydrous Na2SO4 and the solvent was removed under reduced pressure. Recrystallization from CH2Cl2 / Et2O yielded a mono-sided polyethylene acrylate product.

[0052] Infrared spectroscopy characterization: Infrared spectra were measured using a Fourier transform infrared spectrometer. The curing agent was added to the sample at a 1:100 ratio with spectral-grade KBr powder, and the wavenumber region (4000 cm⁻¹) was selected. -1 ~400cm -1 The results are as follows: IR(neat,cm) -1 ):vmax~3417,O–H;~1736,C=O.

[0053] NMR results are as follows Figure 1 As shown in the figure: 1 H NMR 4.20,3.82,3.71-2.92,2.34,1.64,1.38-1.25,0.89ppm.

[0054] The preparation method of double-sided polyethylene acrylate is as follows:

[0055]

[0056] Polyethylene glycol (PAG4000) (5 mmol) and p-toluenesulfonic acid (2.5 mmol) were added to a 15 mmol polyacrylic acid (molecular weight 3500) solution in toluene (500 mL). The mixture was heated to reflux and water was separated using a water separator. The reaction was allowed to proceed overnight. After distilling off the toluene, CH2Cl2 was added, followed by washing with water and drying with anhydrous Na2SO4. The solvent was removed under reduced pressure. After washing with diethyl ether, the double-sided polyethylene acrylate product was obtained.

[0057] The preparation method of hydroxyethyl polyacrylamide compound is as follows:

[0058]

[0059] Saturated fatty acid (Acid 350, Baker Hughes) (50 mmol) was added to thionyl chloride (50 mL), the mixture was heated to 90 °C, and stirred for 2 h. Excess thionyl chloride was evaporated, and a small amount of toluene was added to further evaporate any remaining thionyl chloride, yielding a pale yellow acyl chloride solid. Under nitrogen protection, a THF solution of the obtained acyl chloride (200 mL) was added dropwise to a THF solution of 2-aminoethanol (75 mmol) and triethylamine (100 mmol), stirred at room temperature for 30 min, filtered, and the resulting solid was washed with n-hexane and diethyl ether, then recrystallized from CHCl3 / MeOH to obtain a hydroxyethylamide compound. The NMR results are shown below. Figure 2 As shown. Saturated fatty acids can also be selected from Acid 550 or Acid 700.

[0060] The preparation method of polyethylene grafted with maleic acid polyethylene glycol ester is as follows:

[0061]

[0062] Toluenesulfonic acid (50 mg) was added to a xylene (400 mL) solution of maleic anhydride-grafted polyethylene (AC 950P, Honeywell) (10 g) and methoxy polyethylene glycol (2 g). The mixture was heated to reflux and water was separated using a separator. The reaction was allowed to proceed overnight. The reaction system was allowed to cool naturally to 100 °C, then poured into ethanol and stirred for 1 h. The mixture was filtered, the resulting solid was washed with diethyl ether, and dried under vacuum to give a white solid product. The NMR results are as follows: Figure 3 As shown. Maleic anhydride-grafted polyethylene can also be selected as AC 596A.

[0063] Modified water glass solution refers to commercially available industrial water glass that has been modified by adding a certain amount of alkaline reagents such as sodium hydroxide (the amount added depends on the specific modulus requirement). The modified water glass (sodium silicate, Na2SiO3·nH2O, potassium silicate K2SiO3·nH2O, lithium silicate Li2SiO3·nH2O) has two or more of these compounds. Its modulus (the ratio of SiO2 to X2O in the water glass, where X is Na, K, or Li) is Ms = 1.5-2.5.

[0064] This invention uses potassium hydroxide to modify water glass (commonly available industrial water glass with a modulus of 2.0, a Na2O mass fraction of 13.25%, and a SiO2 mass fraction of 26.5%), resulting in a modulus of 2.5 after modification.

[0065] The Yellow River sediment used in this invention is from the Yellow River sediment generated during ecological dredging at the Huayuankou section of the Yellow River in Zhengzhou, with an apparent density of / (g·cm). －3 ): 2.61, bulk density / (g·cm³) －3 ):1.2;Mud content / %:0.6,Moisture content / %:4.1。

[0066] The stone powder used in this invention is a by-product dust generated during aggregate mining, specifically stone powder generated during the production of building aggregates at the Dongshan Mining Project in Yanshi District, Luoyang City, with a specific surface area of ​​500-600 m². 2 ·kg -1 .

[0067] The natural adhesive is one or a mixture of more than one of plant gums, rosin, and bitumen. Plant gums include guar gum, sesame gum, and coumarin gum; this invention uses guar gum.

[0068] Example 1

[0069] A curing and bonding agent for a mixture of Yellow River silt and stone powder comprises, by weight percentage: 5% polyethylene acrylate, 5% hydroxyethyl polyacrylamide compound, 6% polyethylene-grafted maleic acid polyethylene acrylate, 1% natural adhesive, and the balance being modified water glass; wherein the polyethylene acrylate is a double-sided polyethylene acrylate; the above raw materials are mixed evenly, and heating can be performed if the temperature is too low. The natural adhesive is rosin.

[0070] Example 2

[0071] A curing and bonding agent for a mixture of Yellow River silt and stone powder comprises, by weight percentage: 6% polyethylene acrylate, 8% hydroxyethyl polyacrylamide compound, 8% polyethylene-grafted maleic acid polyethylene acrylate, 3% natural adhesive, and the balance being modified water glass; wherein the polyethylene acrylate is a single-sided polyethylene acrylate; the above raw materials are mixed evenly, and heating can be performed if the temperature is too low. The natural adhesive is guar gum.

[0072] Example 3

[0073] A curing and bonding agent for a mixture of Yellow River silt and stone powder comprises, by weight percentage: 8% polyethylene acrylate, 6% hydroxyethyl polyacrylamide compound, 5% polyethylene-grafted maleic acid polyethylene acrylate, 5% natural adhesive, and the balance being modified water glass; wherein the polyethylene acrylate is a single-sided polyethylene acrylate; the above raw materials are mixed evenly, and heating can be performed if the temperature is too low. The natural adhesive is rosin.

[0074] Example 4

[0075] A curing and bonding agent for a mixture of Yellow River silt and stone powder comprises, by weight percentage: 9% polyethylene acrylate, 10% hydroxyethyl polyacrylamide compound, 9% polyethylene-grafted maleic acid polyethylene acrylate, 7% natural adhesive, and the balance being modified water glass; wherein the polyethylene acrylate is a single-sided polyethylene acrylate; the above raw materials are mixed evenly, and heating can be performed if the temperature is too low. The natural adhesive is guar gum.

[0076] Example 5

[0077] A curing and bonding agent for a mixture of Yellow River silt and stone powder comprises, by weight percentage: 10% polyethylene acrylate, 7% hydroxyethyl polyacrylamide compound, 10% polyethylene-grafted maleic acid polyethylene acrylate, 10% natural adhesive, and the balance being modified water glass; wherein the polyethylene acrylate is a single-sided polyethylene acrylate; the above raw materials are mixed evenly, and heating can be performed if the temperature is too low. The natural adhesive is guar gum.

[0078] Example 6

[0079] The curing binder prepared in Example 1 was used to conduct a curing experiment on Yellow River sediment. The mixture consisted of 70 wt% Yellow River sediment, 5 wt% curing binder, and 25 wt% water. The mixture was stirred thoroughly and cured for 28 days. The resulting electron microscope image is shown below. Figure 4As shown, the solidifying binder of this invention binds to Yellow River sediment particles through weak interactions, resulting in a significant increase in soil particle size. The soil particles remain aggregated and bound together due to flocculation, forming aggregates. The formation of these aggregates further increases the average particle size and alters the soil's particle size distribution, effectively improving the water retention, compressive strength, and water resistance of Yellow River sediment. Through simulated artificial rainfall, the solidified Yellow River sediment material can withstand continuous heavy rainfall for over 60 hours, while pure loess only resists water erosion for 7 minutes under heavy rainfall intensity.

[0080] Example 7

[0081] A building material made from a mixture of Yellow River silt and stone powder, comprising, by weight, 20-80 parts of solid components and 20-80 parts of a curing binder. The solid components, by weight percentage, comprise 75-85% stone powder, 10-20% Yellow River silt, and 1-5% quicklime. Its preparation method includes the following steps:

[0082] (1) First, mix the stone powder, quicklime and mud and sand solid mixture together, stir for 10 minutes at a speed of 200 r / min, and then mix them evenly for later use.

[0083] (2) Then add the mixed solid mixture to the curing adhesive while stirring at a speed of 200 r / min. After stirring evenly, pour the material into the mold, smooth the surface and shape it. Dry it at room temperature for 10 hours to obtain the Yellow River silt and stone powder mixed building material. The specific raw material ratio is shown in Table 1.

[0084] The curing adhesive used is the product prepared in Example 1. Other proportions of the solid adhesive can also be used, with little difference in effect from this embodiment, and will not be described in detail. The solid components can be selected according to actual needs, and the properties of the prepared product are within the data range of this embodiment, and will not be specifically described.

[0085] Images of the prepared products are as follows Figure 5 As can be seen, the product prepared by the present invention has no obvious difference in appearance from ordinary plastic products and can be used as a substitute for plastic decorative materials.

[0086] The mechanical properties of the prepared product were determined using the following method:

[0087] Impact strength test method: The specimen is a cuboid with dimensions of 120 mm in length, 15 mm in width, and 10 mm in height. A simply supported beam pendulum impact testing machine is used, and the impact velocity of the pendulum impacting the center of the specimen is 2.9 m / s.

[0088] Bending strength test method: The specimen is a cuboid with dimensions of 90 mm in length, 15 mm in width, and 4 mm in height. The bending strength test of the composite material adopts the three-point bending method with a span of 64 mm and a loading indenter radius of 5 ± 0.1 mm. The test speed is 2 mm / min.

[0089] Hardness testing method: Shore A hardness is tested. The sample is a cylinder with a radius of 2 cm and a height of 1.5 cm, and the sample surface is flat. The indenter is at least 9 mm away from any edge, and the area covered by the indenter when it contacts the sample is at least 6 mm in radius from the tip of the indenter.

[0090] See Table 1 for specific data.

[0091] Table 1. Principle proportions and mechanical properties of hybrid building materials in different embodiments.

[0092] Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Stone powder (parts by weight) 16 32 64 16 16 0 Yellow River sediment (parts by weight) 3.4 6.8 13.6 3.4 3.4 0 Quicklime (parts by weight) 0.6 1.2 2.4 0.6 0.6 0 Curing adhesive (parts by weight) 20 20 20 40 80 40 <![CDATA[Impact strength / KJ / M 2 > 5.68 7.73 9.84 9.12 15.11 6.03 Bending strength / MPa 10.47 12.82 12.13 13.46 15.42 16.75 Hardness / D 25.45 27.79 29.14 30.11 33.10 24.36

[0093] As shown in the table above, the Yellow River silt and stone powder mixed building material of the present invention has significantly improved impact strength and hardness compared with the product of pure curing binder, making it more suitable for building materials and effectively expanding the application range of Yellow River silt and stone powder.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A curing and cohesive agent for a mixture of Yellow River silt and stone powder, characterized in that: By weight percentage, it includes 5-10% polyethylene acrylate, 5-10% hydroxyethyl polyacrylamide compound, 5-10% polyethylene grafted maleic acid polyethylene acrylate, 1-10% natural adhesive, and the balance being modified water glass; the polyethylene acrylate is a single-sided polyethylene acrylate or a double-sided polyethylene acrylate. The chemical formula of unilateral polyethylene acrylate is as follows: ， Where: n = 30~7000, x = 4~300; The chemical formula of the double-sided polyethylene acrylate is as follows: ， Where n = 30~7000, x = 4~300; The chemical formula of the hydroxyethyl polyacrylamide compound is as follows: ， Where n = 30~7000; The chemical formula of the polyethylene grafted with maleic acid polyethylene glycol ester is as follows: ， or , Where n = 10~300, x = 1~100.

2. The curing adhesive according to claim 1, characterized in that: The preparation method of the single-sided polyethylene acrylate is as follows: Thionyl chloride was added to polyacrylic acid, the temperature was raised to 90°C, and the mixture was stirred for 2 h. Excess thionyl chloride was evaporated off, and a small amount of toluene was added to continue evaporating the remaining thionyl chloride in the system, yielding a pale yellow acyl chloride solid product. The reactants were dried under vacuum and dissolved in dry CH2Cl2. A CH2Cl2 solution of polyethylene glycol and triethylamine was added dropwise under ice bath conditions, and the mixture was stirred overnight at room temperature. The reaction solution was washed with 1 N dilute hydrochloric acid and water, and the organic phase was dried with anhydrous Na2SO4 and the solvent was removed under reduced pressure. The product was obtained by recrystallization from CH2Cl2 / Et2O.

3. The curing adhesive according to claim 1, characterized in that: The preparation method of the double-sided polyethylene acrylate is as follows: polyethylene glycol and p-toluenesulfonic acid are added to a toluene solution of polyacrylic acid, the mixture is heated under reflux and water is separated using a water separator, and the reaction is carried out overnight; after the toluene is distilled off, CH2Cl2 is added, the mixture is washed with water and dried with anhydrous Na2SO4, the solvent is removed under reduced pressure, and the product is obtained after washing with diethyl ether.

4. The curing adhesive according to claim 1, characterized in that: The preparation method of the hydroxyethyl polyacrylamide compound is as follows: thionyl chloride is added to polyacrylic acid, the temperature is raised to 90°C, and the mixture is stirred for 2 h; excess thionyl chloride is evaporated off, and a small amount of toluene is added to continue evaporating off the residual thionyl chloride in the system, yielding a pale yellow acyl chloride solid product; under nitrogen protection, a THF solution of the obtained acyl chloride is added dropwise to a THF solution of 2-aminoethanol and triethylamine, and the mixture is stirred at room temperature for 30 min, filtered, and the obtained solid is washed with n-hexane and diethyl ether, and then recrystallized from CHCl3 / MeOH to obtain the hydroxyethyl amide compound.

5. The curing adhesive according to claim 1, characterized in that: The preparation method of the polyethylene grafted with maleic acid polyethylene glycol ester is as follows: p-toluenesulfonic acid is added to a xylene solution of maleic anhydride grafted polyethylene and polyethylene glycol or methoxy polyethylene glycol, the mixture is heated to reflux and water is separated using a water separator, and the reaction is carried out overnight; when the reaction system is naturally cooled to 100°C, it is poured into ethanol and stirred for 1 h; the mixture is filtered, the obtained solid is washed with diethyl ether, and dried under vacuum to obtain a white solid product.

6. The curing adhesive according to claim 1, characterized in that: The natural adhesive is one or a mixture of more than one of plant gums, rosin, and asphalt.

7. The curing adhesive according to any one of claims 1-5, characterized in that: The modified water glass refers to industrial water glass that has been modified by adding a certain amount of alkaline reagent, and the modulus of the modified water glass is Ms=1.5-2.

5.

8. The curing binder according to any one of claims 1-7 is used for the curing of Yellow River sediment.

9. A building material made from a mixture of Yellow River silt and stone powder, characterized in that: The product comprises, by weight, 20-80 parts of solid components and 20-80 parts of the curing adhesive as described in any one of claims 1-7, wherein the solid components, by weight percentage, comprise 75-85% stone powder, 10-20% Yellow River silt, and 1-5% quicklime.

10. A method for preparing a mixed building material of Yellow River silt and stone powder as described in claim 9, characterized in that, Includes the following steps: (1) First, mix the stone powder, quicklime and mud and sand solid mixture together, stir for 5-10 minutes at a speed of 200-300 r / min, and mix evenly for later use; (2) Then add the well mixed solid mixture to the curing adhesive while stirring at a speed of 200-300 r / min. After stirring evenly, shape and dry to obtain the Yellow River silt and stone powder mixed building material.

Images