CN104388095A - Double-component nano high-polymer sand stabilization material and sand stabilization method thereof - Google Patents
Double-component nano high-polymer sand stabilization material and sand stabilization method thereof Download PDFInfo
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- CN104388095A CN104388095A CN201410625129.1A CN201410625129A CN104388095A CN 104388095 A CN104388095 A CN 104388095A CN 201410625129 A CN201410625129 A CN 201410625129A CN 104388095 A CN104388095 A CN 104388095A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/30—Polyisocyanates; Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2105/00—Erosion prevention
Abstract
The invention relates to a double-component nano high-polymer sand stabilization material which is composed of a component A and a component B, wherein the component A is composed of an inorganic-nanoparticle-modified polyvinyl alcohol-epoxy resin blend, and the component B is composed of a polyurethane prepolymer. The component A is prepared by the following steps: dispersing nano silicon dioxide in N,N-dimethylformamide, heating to 80-100 DEG C, adding polyvinyl alcohol while stirring until the polyvinyl alcohol is completely dissolved, sequentially adding an epoxy resin and a crosslinking agent DMP30, continuing stirring for 1-3 hours, and cooling to room temperature. The component B is prepared by the following steps: adding castor oil into N,N-dimethylformamide, heating to 40-60 DEG C, adding tolyl-2,4-diisocyanate while stirring, continuing stirring to react for 0.5-1.5 hours, and cooling to room temperature. The invention also relates to a sand stabilization method of the material. The sand stabilization material has the characteristics of high sand stabilization strength, high durability, moderate water absorptivity, high water stability and favorable ultraviolet radiation aging resistance under lower consumption conditions.
Description
Technical field
The present invention relates to desert and desertification treatment field, particularly relate to two component nano-high molecule sand fixation material and sand-fixation method thereof.
Background technology
Desertification is one of the maximum environment and socioeconomic problem that the world today faces, the one that in Ye Shi China Desertification Types, area is maximum, harm is the most serious.Desertification not only makes originally fragile ecotope more worsen, and brings to the industrial and agricultural production of Desertification and people's lives to have a strong impact on.The rapid expansion of desertification land area, causes environmental degradation and huge financial loss, becomes the focus of global extensive concern.Check the Desertification impetus be becoming increasingly rampant, just must fix the sand.The mode of fixing the sand mainly contains three kinds now: engineering is fixed the sand, plant (biology) is fixed the sand and chemical sand-fixing.
Chemical sand-fixing is on the sand ground of flowing, spray organic or inorganic chemistry cohesive material, tectum is formed on the husky surface of flowing, or infiltrate in the sand of top layer, loose grains of sand bonding is got up to form the bonding course (duricrust) with certain wind erosion-resistance performance, thus prevent wind-force from raising blowing of the grains of sand and carrying, improve stability and the water-retentivity of sandy soil, reach tackling quicksand, prevent and treat sand damage, and then the object of improvement and improvement Desertification Soil.Have the advantage of himself compared with chemical sand-fixing fixes the sand with sand consolidation with biologic, engineering, the construction of chemical sand-fixing technology is simple, cost is low, instant effect, can improve Desertification Soil rapidly, for good water and soil condition is created in plant-growth.
Chemical sand-fixing mainly contains following four large classes according to the composition of chemical material: grout, water glass class, petroleum products class and high molecular polymer super absorbent resin lipid.High molecular polymer super absorbent resin lipid sand fixation material is one of study hotspot of current chemical sand fixing material, drift sand is administered with it, the non-structure grains of sand of dispersion can be made to aggregate into and large to be rich in certain elasticity, not breakable liptinite, thus reach the object of arrested dune.Its sand-fixing effect is all comparatively more remarkable and stable than other general chemistry materials.But the good macromolecular sand-fixation material of water-absorbent, often sand fixing strength is inadequate, and over-all properties is poor.
Polyvinyl alcohol is a kind of important water-soluble polymers, its good mechanical performance.Epoxy resin has good chemical stability, cementability and processibility, but its maximum weakness is that after solidification, matter is crisp, shock-resistance is poor and easily ftractures.Urethane is a class containing the macromolecular compound of Polar Amides manthanoate repeating segment, has the excellent properties such as wear-resisting, high temperature resistant, corrosion-resistant, good processability.Mix with epoxy resin using urethane as a kind of component, can the interpenetrating polymer networks material of forming property excellence.
Nanoparticle is widely applied in polymer modification field owing to having the features such as quantum size effect, macro quanta tunnel effect, surface and interface effect.Research shows form tangled structure between nano silicon and polymer molecular chain, thus produces obviously impact to the performance of polymkeric substance.But have not yet to see the report of nano-silicon dioxide modified polyvinyl alcohol-epoxy resin-polyurethane ternary IPN, more do not have in-situ polymerization to be formed report that this material is used as chemical sand-fixing materials.
Summary of the invention
Technical problem to be solved by this invention is to provide two component nano-high molecule sand fixation materials of good, the easy scale construction of a kind of over-all properties.
Another technical problem to be solved by this invention is to provide the sand-fixation method of this sand fixation material.
For solving the problem, of the present invention pair of component nano-high molecule sand fixation material, is characterized in that: the component A that this material is made up of the polyvinyl alcohol-epoxy resin blend of inorganic nanoparticles modification and the component B that base polyurethane prepolymer for use as is formed forms; Wherein
Described component A refers to and nano silicon is scattered in N, in dinethylformamide, be heated to 80 ~ 100 DEG C, under agitation add polyvinyl alcohol wherein, after polyvinyl alcohol dissolves completely, add epoxy resin and linking agent DMP30 wherein successively again, continue stirring and be down to room temperature after 1 ~ 3 hour and get final product; Described nano silicon and described N, the ratio of dinethylformamide is 0.01 ~ 0.05kg:100 ~ 500mL, the ratio of described nano silicon and described polyvinyl alcohol is 0.01 ~ 0.05kg:0.15 ~ 0.25kg, and the ratio of described nano silicon and described epoxy resin is 0.01 ~ 0.05kg:0.15 ~ 0.25kg; The ratio of described nano silicon and described DMP30 is 0.01 ~ 0.05kg:0.01 ~ 0.02kg;
Described component B refers to and add Viscotrol C in DMF, is heated to 40 ~ 60 DEG C, under agitation adds Toluene-2,4-diisocyanate, 4-vulcabond, continues stirring reaction 0.5 ~ 1.5 hour, is down to room temperature and get final product; The ratio of described Viscotrol C and described DMF is 0.2 ~ 0.28kg:100 ~ 500mL, described Viscotrol C and described Toluene-2,4-diisocyanate, and the ratio of 4-vulcabond is 0.2 ~ 0.28kg:0.3 ~ 0.42kg.
The particle diameter of described nano silicon is 20 ~ 100 nanometers.
The equal relative molecular mass of number of described polyvinyl alcohol is 140000 ~ 210000.
The sand-fixation method of two component nano-high molecule sand fixation material as above, is characterized in that: the method refers in butt, respectively component A is pressed 0.0208 ~ 0.0371 kg/m
2, component B is by 0.0325 ~ 0.0455kg/m
2fountain height be sprayed on drift sand surface, make Shamian Island form the sand-fixing measure of 3 ~ 5 mm thick.
The sand-fixation method of component nano-high molecule sand fixation material as above two, is characterized in that: the method covers drift sand surface after referring to and component A, component B fully being mixed with granularity 100 ~ 200 object fine sand, what formation 3 ~ 5mm was thick fix the sand layer; Wherein said component A in the ratio of butt and described fine sand for 4.2 ~ 7.4kg:2000kg, described B component in the ratio of butt and described fine sand for 6.5 ~ 9.1kg:2000kg.
The present invention compared with prior art has the following advantages:
1, the present invention is compared with existing polymer chemistry sand fixation material, adopt two component high-molecular in-situ polymerization techniques that nano inorganic is granule modified, to make overall plans polyvinyl alcohol, epoxy resin, the mechanics mechanical property of each polymer component of urethane and the factor such as water-absorbent, water permeate, obtained the organic polymer nano-complex chemical sand fixing material of excellent combination property.
2, after tested, the sand fixation material of gained of the present invention has the advantages that sand fixing strength is large, persistence is strong, water-absorbent is moderate, water stability is good, ultra-violet radiation resisting aging resistance is good under compared with low consumption.
By A, B two component fix the sand the ratio of method according to the mixing of embodiment 2 and embodiment 4 and fully mix with fine sand, being compacted into diameter is in a mold 4.65 cm, and the right cylinder of thickness about 0.6 cm fixes the sand block, as shown in Figure 2.Fix the sand the mensuration of ultimate compression strength of block and select the unlimited pressure tester of driven stone dirt (YYW-II type, operating voltage 220 V, power of motor 30 W, Cangzhou Ji Lu test apparatus company limited); Ultraviolet-resistant aging performance test continuous gamma radiation (ultraviolet carbon arc lamp, 15 watts/square metre, lamp is apart from 25 centimetres) at constant temperature 25 DEG C tests the reduction of ultimate compression strength for 6 days afterwards; Fixing the sand the water tolerance of block and water permeate test is be placed in tap water by fixing the sand block, successive soaking 6 days, observes and fixes the sand the morphology change of block, dry surface-moisture fast and weigh and compare with original weight after taking-up, calculate water-intake rate, compare simultaneously and fix the sand block and soaked front ultimate compression strength after immersion.Fix the sand the performance test results of block in table 1.
Table 1 macromolecular sand-fixation material of the present invention fixes the sand performance test
3, utilize the sand fixation material of gained of the present invention to carry out chemical sand-fixing and there is the construction of simple, easy scale.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is that the two component macromolecular sand-fixation material of surface sprinkling of the present invention fixes the sand photo.
Fig. 2 is that the two component polymer of the present invention and fine sand are uniformly mixed to form and fix the sand the photo of block.
Embodiment
embodiment 1two component nano-high molecule sand fixation material, the component A that this material is made up of the polyvinyl alcohol-epoxy resin blend of inorganic nanoparticles modification and the component B that base polyurethane prepolymer for use as is formed forms.Wherein
Component A refers to particle diameter to be that the nano silicon of 20 nanometers is scattered in N, in dinethylformamide, be heated to 80 DEG C, under agitation adding several equal relative molecular mass is wherein the polyvinyl alcohol of 160000, after polyvinyl alcohol dissolves completely, add epoxy resin and linking agent DMP30 wherein successively again, continue stirring and be down to room temperature after 1 hour and get final product.The ratio of nano silicon and DMF is 0.01kg:400mL, and the ratio of nano silicon and polyvinyl alcohol is 0.01kg:0.15kg, and the ratio of nano silicon and epoxy resin is 0.01kg:0.25kg; The ratio of nano silicon and DMP30 is 0.01kg:0.01kg.
Component B refers to and add Viscotrol C in DMF, is heated to 40 DEG C, under agitation adds Toluene-2,4-diisocyanate, 4-vulcabond, continues stirring reaction 0.5 hour, is down to room temperature and get final product.The ratio of Viscotrol C and DMF is 0.28kg:200mL, Viscotrol C and Toluene-2,4-diisocyanate, and the ratio of 4-vulcabond is 0.28kg:0.3kg.
The sand-fixation method of this pair of component nano-high molecule sand fixation material refers in butt, respectively component A is pressed 0.0208kg/m
2, component B presses 0.0455kg/m
2fountain height be sprayed on drift sand surface, making Shamian Island form the sand-fixing measure of 3 ~ 5 mm thick can (as shown in Figure 1).
embodiment 2two component nano-high molecule sand fixation material, the component A that this material is made up of the polyvinyl alcohol-epoxy resin blend of inorganic nanoparticles modification and the component B that base polyurethane prepolymer for use as is formed forms.Wherein
Component A refers to particle diameter to be that the nano silicon of 30 nanometers is scattered in N, in dinethylformamide, be heated to 100 DEG C, under agitation adding several equal relative molecular mass is wherein the polyvinyl alcohol of 140000, after polyvinyl alcohol dissolves completely, add epoxy resin and linking agent DMP30 wherein successively again, continue stirring and be down to room temperature after 3 hours and get final product.The ratio of nano silicon and DMF is 0.02kg:250mL, and the ratio of nano silicon and polyvinyl alcohol is 0.02kg:0.2kg, and the ratio of nano silicon and epoxy resin is 0.02kg:0.22kg; The ratio of nano silicon and DMP30 is 0.02kg:0.02kg.
Component B refers to and add Viscotrol C in DMF, is heated to 60 DEG C, under agitation adds Toluene-2,4-diisocyanate, 4-vulcabond, continues stirring reaction 1.5 hours, is down to room temperature and get final product.The ratio of Viscotrol C and DMF is 0.23kg:300mL, Viscotrol C and Toluene-2,4-diisocyanate, and the ratio of 4-vulcabond is 0.23kg:0.35kg.
The sand-fixation method of this pair of component nano-high molecule sand fixation material covers drift sand surface after referring to and component A, component B fully being mixed with granularity 100 object fine sand, formed 3 ~ 5mm thick fix the sand layer.Wherein component A in the ratio of butt and fine sand for 4.2kg:2000kg, B component in the ratio of butt and fine sand for 9.1kg:2000kg(as shown in Figure 2).
embodiment 3two component nano-high molecule sand fixation material, the component A that this material is made up of the polyvinyl alcohol-epoxy resin blend of inorganic nanoparticles modification and the component B that base polyurethane prepolymer for use as is formed forms.Wherein
Component A refers to particle diameter to be that the nano silicon of 50 nanometers is scattered in N, in dinethylformamide, be heated to 90 DEG C, under agitation adding several equal relative molecular mass is wherein the polyvinyl alcohol of 170000, after polyvinyl alcohol dissolves completely, add epoxy resin and linking agent DMP30 wherein successively again, continue stirring and be down to room temperature after 2 hours and get final product.The ratio of nano silicon and DMF is 0.03kg:350mL, and the ratio of nano silicon and polyvinyl alcohol is 0.03kg:0.25kg, and the ratio of nano silicon and epoxy resin is 0.03kg:0.15kg; The ratio of nano silicon and DMP30 is 0.03kg:0.01kg.
Component B refers to and add Viscotrol C in DMF, is heated to 50 DEG C, under agitation adds Toluene-2,4-diisocyanate, 4-vulcabond, continues stirring reaction 1 hour, is down to room temperature and get final product.The ratio of Viscotrol C and DMF is 0.25kg:100mL, Viscotrol C and Toluene-2,4-diisocyanate, and the ratio of 4-vulcabond is 0.25kg:0.35kg.
The sand-fixation method of this pair of component nano-high molecule sand fixation material refers in butt, respectively component A is pressed 0.0295kg/m
2, component B presses 0.0376kg/m
2fountain height be sprayed on drift sand surface, making Shamian Island form the sand-fixing measure of 3 ~ 5 mm thick can (as shown in Figure 1).
embodiment 4two component nano-high molecule sand fixation material, the component A that this material is made up of the polyvinyl alcohol-epoxy resin blend of inorganic nanoparticles modification and the component B that base polyurethane prepolymer for use as is formed forms.Wherein
Component A refers to particle diameter to be that the nano silicon of 80 nanometers is scattered in N, in dinethylformamide, be heated to 85 DEG C, under agitation adding several equal relative molecular mass is wherein the polyvinyl alcohol of 210000, after polyvinyl alcohol dissolves completely, add epoxy resin and linking agent DMP30 wherein successively again, continue stirring and be down to room temperature after 1.5 hours and get final product.The ratio of nano silicon and DMF is 0.04kg:100mL, and the ratio of nano silicon and polyvinyl alcohol is 0.04kg:0.23kg, and the ratio of nano silicon and epoxy resin is 0.04kg:0.25kg; The ratio of nano silicon and DMP30 is 0.04kg:0.02kg.
Component B refers to and add Viscotrol C in DMF, is heated to 45 DEG C, under agitation adds Toluene-2,4-diisocyanate, 4-vulcabond, continues stirring reaction 0.5 hour, is down to room temperature and get final product.The ratio of Viscotrol C and DMF is 0.2kg:500mL, Viscotrol C and Toluene-2,4-diisocyanate, and the ratio of 4-vulcabond is 0.2kg:0.4kg.
The sand-fixation method of this pair of component nano-high molecule sand fixation material covers drift sand surface after referring to and component A, component B fully being mixed with granularity 200 object fine sand, formed 3 ~ 5mm thick fix the sand layer.Wherein component A in the ratio of butt and fine sand for 7.4kg:2000kg, B component in the ratio of butt and fine sand for 6.5kg:2000kg(as shown in Figure 2).
embodiment 5two component nano-high molecule sand fixation material, the component A that this material is made up of the polyvinyl alcohol-epoxy resin blend of inorganic nanoparticles modification and the component B that base polyurethane prepolymer for use as is formed forms.Wherein
Component A refers to particle diameter to be that the nano silicon of 100 nanometers is scattered in N, in dinethylformamide, be heated to 95 DEG C, under agitation adding several equal relative molecular mass is wherein the polyvinyl alcohol of 190000, after polyvinyl alcohol dissolves completely, add epoxy resin and linking agent DMP30 wherein successively again, continue stirring and be down to room temperature after 2.5 hours and get final product.The ratio of nano silicon and DMF is 0.05kg:500mL, and the ratio of nano silicon and polyvinyl alcohol is 0.05kg:0.25kg, and the ratio of nano silicon and epoxy resin is 0.05kg:0.25kg; The ratio of nano silicon and DMP30 is 0.05kg:0.01kg.
Component B refers to and add Viscotrol C in DMF, is heated to 55 DEG C, under agitation adds Toluene-2,4-diisocyanate, 4-vulcabond, continues stirring reaction 1.5 hours, is down to room temperature and get final product.The ratio of Viscotrol C and DMF is 0.2kg:150mL, Viscotrol C and Toluene-2,4-diisocyanate, and the ratio of 4-vulcabond is 0.26kg:0.42kg.
The sand-fixation method of this pair of component nano-high molecule sand fixation material refers in butt, respectively component A is pressed 0.0371kg/m
2, component B presses 0.0325kg/m
2fountain height be sprayed on drift sand surface, making Shamian Island form the sand-fixing measure of 3 ~ 5 mm thick can (as shown in Figure 1).
embodiment 6two component nano-high molecule sand fixation material, the component A that this material is made up of the polyvinyl alcohol-epoxy resin blend of inorganic nanoparticles modification and the component B that base polyurethane prepolymer for use as is formed forms.Wherein
Component A refers to particle diameter to be that the nano silicon of 80 nanometers is scattered in N, in dinethylformamide, be heated to 85 DEG C, under agitation adding several equal relative molecular mass is wherein the polyvinyl alcohol of 210000, after polyvinyl alcohol dissolves completely, add epoxy resin and linking agent DMP30 wherein successively again, continue stirring and be down to room temperature after 1.5 hours and get final product.The ratio of nano silicon and DMF is 0.04kg:100mL, and the ratio of nano silicon and polyvinyl alcohol is 0.04kg:0.23kg, and the ratio of nano silicon and epoxy resin is 0.04kg:0.25kg; The ratio of nano silicon and DMP30 is 0.04kg:0.015kg.
Component B refers to and add Viscotrol C in DMF, is heated to 45 DEG C, under agitation adds Toluene-2,4-diisocyanate, 4-vulcabond, continues stirring reaction 0.5 hour, is down to room temperature and get final product.The ratio of Viscotrol C and DMF is 0.2kg:500mL, Viscotrol C and Toluene-2,4-diisocyanate, and the ratio of 4-vulcabond is 0.2kg:0.4kg.
The sand-fixation method of this pair of component nano-high molecule sand fixation material covers drift sand surface after referring to and component A, component B fully being mixed with granularity 150 object fine sand, formed 3 ~ 5mm thick fix the sand layer.Wherein component A in the ratio of butt and fine sand for 5.8kg:2000kg, B component in the ratio of butt and fine sand for 7.8kg:2000kg.
Claims (5)
1. pair component nano-high molecule sand fixation material, is characterized in that: the component A that this material is made up of the polyvinyl alcohol-epoxy resin blend of inorganic nanoparticles modification and the component B that base polyurethane prepolymer for use as is formed forms; Wherein
Described component A refers to and nano silicon is scattered in N, in dinethylformamide, be heated to 80 ~ 100 DEG C, under agitation add polyvinyl alcohol wherein, after polyvinyl alcohol dissolves completely, add epoxy resin and linking agent DMP30 wherein successively again, continue stirring and be down to room temperature after 1 ~ 3 hour and get final product; Described nano silicon and described N, the ratio of dinethylformamide is 0.01 ~ 0.05kg:100 ~ 500mL, the ratio of described nano silicon and described polyvinyl alcohol is 0.01 ~ 0.05kg:0.15 ~ 0.25kg, and the ratio of described nano silicon and described epoxy resin is 0.01 ~ 0.05kg:0.15 ~ 0.25kg; The ratio of described nano silicon and described DMP30 is 0.01 ~ 0.05kg:0.01 ~ 0.02kg;
Described component B refers to and add Viscotrol C in DMF, is heated to 40 ~ 60 DEG C, under agitation adds Toluene-2,4-diisocyanate, 4-vulcabond, continues stirring reaction 0.5 ~ 1.5 hour, is down to room temperature and get final product; The ratio of described Viscotrol C and described DMF is 0.2 ~ 0.28kg:100 ~ 500mL, described Viscotrol C and described Toluene-2,4-diisocyanate, and the ratio of 4-vulcabond is 0.2 ~ 0.28kg:0.3 ~ 0.42kg.
2. two component nano-high molecule sand fixation material as claimed in claim 1, is characterized in that: the particle diameter of described nano silicon is 20 ~ 100 nanometers.
3. two component nano-high molecule sand fixation material as claimed in claim 1, is characterized in that: the equal relative molecular mass of number of described polyvinyl alcohol is 140000 ~ 210000.
4. the sand-fixation method of two component nano-high molecule sand fixation material as claimed in claim 1, is characterized in that: the method refers in butt, respectively component A is pressed 0.0208 ~ 0.0371 kg/m
2, component B is by 0.0325 ~ 0.0455kg/m
2fountain height be sprayed on drift sand surface, make Shamian Island form the sand-fixing measure of 3 ~ 5 mm thick.
5. the sand-fixation method of two component nano-high molecule sand fixation material as claimed in claim 1, it is characterized in that: the method covers drift sand surface after referring to and component A, component B fully being mixed with granularity 100 ~ 200 object fine sand, formed 3 ~ 5mm thick fix the sand layer; Wherein said component A in the ratio of butt and described fine sand for 4.2 ~ 7.4kg:2000kg, described B component in the ratio of butt and described fine sand for 6.5 ~ 9.1kg:2000kg.
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| CN112707679A (en) * | 2020-12-31 | 2021-04-27 | 吉林大学 | Low-temperature sand-fixing quick-setting material and application thereof |
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| CN111560253A (en) * | 2020-04-21 | 2020-08-21 | 陈晨 | High-weather-resistance sand fixation material |
| CN112707679A (en) * | 2020-12-31 | 2021-04-27 | 吉林大学 | Low-temperature sand-fixing quick-setting material and application thereof |
| CN114989833A (en) * | 2022-06-30 | 2022-09-02 | 润涵(山东)生态科技有限公司 | Ecological environment-friendly functional sand fixing agent and sand fixing method |
| CN114989833B (en) * | 2022-06-30 | 2024-03-22 | 润涵(山东)生态科技有限公司 | Ecological environment-friendly functional sand-fixing agent and sand-fixing method |
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