CN113789777A - Frozen soil foundation construction method - Google Patents
Frozen soil foundation construction method Download PDFInfo
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- CN113789777A CN113789777A CN202111112484.5A CN202111112484A CN113789777A CN 113789777 A CN113789777 A CN 113789777A CN 202111112484 A CN202111112484 A CN 202111112484A CN 113789777 A CN113789777 A CN 113789777A
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- 239000002689 soil Substances 0.000 title claims abstract description 61
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 49
- 239000011810 insulating material Substances 0.000 claims abstract description 35
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 12
- 239000004964 aerogel Substances 0.000 claims abstract description 10
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims abstract description 9
- 239000012774 insulation material Substances 0.000 claims abstract description 8
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 7
- 239000011398 Portland cement Substances 0.000 claims abstract description 7
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 7
- 238000004321 preservation Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000004793 Polystyrene Substances 0.000 claims abstract description 3
- 229920002223 polystyrene Polymers 0.000 claims abstract description 3
- 239000004005 microsphere Substances 0.000 claims abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
- 238000005096 rolling process Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000006004 Quartz sand Substances 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 6
- 229920000058 polyacrylate Polymers 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 6
- 239000004800 polyvinyl chloride Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 claims description 4
- 238000004880 explosion Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 4
- 239000011324 bead Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 229920006389 polyphenyl polymer Polymers 0.000 description 5
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
- E02D3/123—Consolidating by placing solidifying or pore-filling substances in the soil and compacting the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/14—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against frost heaves in soil
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of engineering construction, in particular to a frozen soil foundation construction method, which comprises the following steps: paving a waterproof material, a heat preservation and insulation material and a foundation in the frozen soil layer from bottom to top in sequence; the heat-insulating material comprises the following components in parts by weight: SiO 228-17 parts of aerogel, 5-9 parts of polystyrene particles, 2-8 parts of ordinary portland cement, 5-10 parts of polyurethane foam, 8-15 parts of hollow glass microspheres, 3-5 parts of ethylene glycol, 2-4 parts of light ceramsite sand and 5-E.C. polyethylene10 parts of basalt fibers and 3-7 parts of basalt fibers. The technical scheme of the invention can provide good heat preservation and insulation performance for the frozen soil layer, maintain the constant temperature of the frozen soil layer, effectively relieve the problems of frost heaving and thaw collapse of the frozen soil layer caused by temperature change, and improve the stability of the foundation.
Description
Technical Field
The invention relates to the technical field of engineering construction, in particular to a frozen soil foundation construction method.
Background
The frozen soil is a soil body medium which is extremely sensitive to temperature, contains abundant underground ice, has the characteristics of rheological property and long-term strength far lower than instantaneous strength, and is continuously developed deeply along with the continuous promotion of the engineering construction in China.
Therefore, maintaining the stability of the frozen soil layer is particularly important in the construction of frozen soil foundations in order to prevent the foundation from being thawed and swelled.
Disclosure of Invention
The invention aims to provide a frozen soil foundation construction method which can provide good heat preservation and heat insulation performance for a frozen soil layer, maintain the constant temperature of the frozen soil layer, effectively relieve the problems of frost heaving and thaw collapse of the frozen soil layer caused by temperature change and improve the stability of the foundation.
The invention provides a frozen soil foundation construction method, which comprises the following steps: paving a waterproof material, a heat preservation and insulation material and a foundation in the frozen soil layer from bottom to top in sequence;
the heat-insulating material comprises the following components in parts by weight: SiO 228-17 parts of aerogel, 5-9 parts of polyphenyl particles, 2-8 parts of ordinary portland cement, 5-10 parts of polyurethane foam, 8-15 parts of hollow glass beads, 3-5 parts of ethylene glycol, 2-4 parts of light ceramsite sand, 5-10 parts of polyethylene, 3-7 parts of basalt fibers and 10-12 parts of water.
The polystyrene particles and the hollow glass beads are adopted as the framework of the heat-insulating material, and the light ceramsite sand is introduced, so that the heat-insulating material has excellent compressive strength, the service life of the heat-insulating material is prolonged, meanwhile, the pores in the hollow glass beads can block the heat transfer, and the hollow beads and the SiO2The aerogel has synergistic effect to make the material have heat-insulating property, and polyethylene and polyurethane foam are introducedThe basalt fiber further enhances the heat preservation and insulation performance of the material, and can improve SiO2The mechanical property of the aerogel is improved, and the SiO is improved2The strength of the aerogel further improves the compressive strength of the heat-insulating material, and meanwhile, the ordinary portland cement and the ethylene glycol are added into the heat-insulating material, so that the heat-insulating material has excellent frost resistance and can be used for a long time under a low-temperature condition.
Furthermore, the thickness of the heat-insulating material is 10-15 cm. If the thickness of the heat-insulating material is too high, convection heat transfer is formed inside the heat-insulating material, and the heat-insulating performance of the material is affected.
Further, the waterproof material comprises the following components in parts by weight: 15-25 parts of polyvinyl chloride, 4-8 parts of silicone-acrylic emulsion, 3-5 parts of polyacrylate, 10-15 parts of quartz sand and 6-8 parts of water. Polyvinyl chloride is used as a main raw material and has synergistic effect with silicone-acrylic emulsion, polyacrylate and quartz sand, so that the material has excellent waterproof performance, and the quartz sand is hard and wear-resistant, so that the waterproof material has excellent compressive strength.
Further, the construction method of the frozen soil foundation comprises the following steps:
s1, excavating a foundation pit in a frozen soil layer, paving a waterproof material, and rolling the waterproof material;
s2, laying a heat-insulating material on the waterproof material, and rolling the heat-insulating material;
and S3, pouring concrete on the heat insulation material, and backfilling the foundation pit layer by layer after the concrete is hardened.
Further, in the step S1, in the process of excavating the foundation pit, when the thickness of the frozen soil layer is less than 0m and less than or equal to 4m, excavating the frozen soil layer by adopting machinery; when the thickness of the frozen soil layer is less than or equal to 1.2m in a range of 4m, mechanically crushing the frozen soil layer; and when the thickness of the frozen soil layer less than 1.2m is less than or equal to 2m, excavating the frozen soil by adopting an explosion method.
Further, in step S1, the number of rolling of the waterproof material is 3 to 5. Through rolling the waterproof material, the waterproof material is tightly combined, and the waterproof effect of the material is more excellent.
Further, in step S2, the number of rolling passes of the heat insulating material is 4 to 6. The heat-insulating material is tightly combined by rolling the heat-insulating material, so that the heat-insulating effect of the material is more excellent.
Further, in step S3, the backfill material is coarse sand or gravel. The non-frost heaving material is adopted to replace frozen soil for backfilling, frozen swelling or thaw collapse of the frozen soil under the influence of temperature change is prevented, and each layer of backfilling material is tamped to ensure the ground stability of the foundation.
Furthermore, the thickness of each layer of backfill material is 100-150 cm.
Further, the height of the backfill material is 300-400 mm higher than the ground. The backfill material is higher than the ground to be used as an anti-settling layer.
The invention has the beneficial effects that:
according to the technical scheme, good heat preservation and insulation performance can be provided for the frozen soil foundation, the constant temperature of the frozen soil layer is maintained, the problems of frost heaving and thaw collapse of the frozen soil layer caused by temperature change are effectively relieved, and the stability of the foundation is improved.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms also include the plural forms unless the context clearly dictates otherwise, and further, it is understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A construction method of a frozen soil foundation comprises the following steps:
s1, excavating a foundation pit in a frozen soil layer, and selecting different excavation modes according to the thickness of the frozen soil layer;
s2, paving a waterproof material in the foundation pit, and rolling the waterproof material for 3 times after paving;
s3, laying a heat-insulating material on the waterproof material, and rolling the heat-insulating material for 4 times after laying is finished;
and S4, pouring concrete on the heat insulation material, and after the concrete is hardened, backfilling the foundation pit layer by using coarse sand, wherein the thickness of each layer of backfilling material is 100cm, and the height of the backfilling material is 300mm higher than the ground to serve as an anti-settling layer.
The heat-insulating material comprises the following raw materials in parts by weight: SiO 228 parts of aerogel, 5 parts of polyphenyl particles, 2 parts of ordinary portland cement, 5 parts of polyurethane foam, 8 parts of hollow glass beads, 3 parts of ethylene glycol, 2 parts of light ceramsite sand, 5 parts of polyethylene, 3 parts of basalt fiber and 10 parts of water;
the waterproof material comprises the following raw materials in parts by weight: 15 parts of polyvinyl chloride, 4 parts of silicone-acrylate emulsion, 3 parts of polyacrylate, 10 parts of quartz sand and 6 parts of water.
Example 2
A construction method of a frozen soil foundation comprises the following steps:
s1, excavating a foundation pit in a frozen soil layer, and selecting different excavation modes according to the thickness of the frozen soil layer;
s2, paving a waterproof material in the foundation pit, and rolling the waterproof material for 4 times after paving;
s3, laying a heat-insulating material on the waterproof material, and rolling the heat-insulating material for 5 times after laying is finished;
and S4, pouring concrete on the heat insulation material, and after the concrete is hardened, backfilling the foundation pit layer by using coarse sand, wherein the thickness of each layer of backfilling material is 130cm, and the height of the backfilling material is 350mm higher than the ground to serve as an anti-settling layer.
The heat-insulating material comprises the following raw materials in parts by weight: SiO 2214 parts of aerogel, 7 parts of polyphenyl particles, 5 parts of ordinary portland cement, 8 parts of polyurethane foam, 12 parts of hollow glass beads, 4 parts of ethylene glycol, 3 parts of light ceramsite sand, 7 parts of polyethylene, 5 parts of basalt fiber and 11 parts of water;
the waterproof material comprises the following raw materials in parts by weight: 20 parts of polyvinyl chloride, 6 parts of silicone-acrylate emulsion, 4 parts of polyacrylate, 13 parts of quartz sand and 7 parts of water.
Example 3
A construction method of a frozen soil foundation comprises the following steps:
s1, excavating a foundation pit in a frozen soil layer, and selecting different excavation modes according to the thickness of the frozen soil layer;
s2, paving a waterproof material in the foundation pit, and rolling the waterproof material for 5 times after paving;
s3, laying a heat-insulating material on the waterproof material, and rolling the heat-insulating material for 6 times after laying;
and S4, pouring concrete on the heat insulation material, and after the concrete is hardened, backfilling the foundation pit layer by using coarse sand, wherein the thickness of each layer of backfilling material is 150cm, and the height of the backfilling material is 400mm higher than the ground to serve as an anti-settling layer.
The heat-insulating material comprises the following raw materials in parts by weight: SiO 2217 parts of aerogel, 9 parts of polyphenyl granules, 8 parts of ordinary portland cement, 10 parts of polyurethane foam, 15 parts of hollow glass beads, 5 parts of ethylene glycol, 4 parts of light ceramsite sand, 10 parts of polyethylene, 7 parts of basalt fiber and 12 parts of water;
the waterproof material comprises the following raw materials in parts by weight: 25 parts of polyvinyl chloride, 8 parts of silicone-acrylate emulsion, 5 parts of polyacrylate, 15 parts of quartz sand and 8 parts of water.
Comparative example 1
Frozen soil foundation construction methodEssentially the same as example 1, with the only difference that: in the heat-insulating material, expanded perlite is used to replace hollow glass micro-beads and SiO2An aerogel.
Comparative example 2
A construction method of a frozen soil foundation is basically the same as that of the embodiment 1, and the only difference is that: in the heat-insulating material, diatomite is used to replace polyphenyl granules.
Comparative example 3
A construction method of a frozen soil foundation is basically the same as that of the embodiment 1, and the only difference is that: in the heat-insulating material, ceramic fiber is used to replace basalt fiber.
Test example
The heat insulating materials prepared in example 1 and comparative examples 1 to 2 were tested, and the test results are shown in table 1.
TABLE 1
| Thermal conductivity (W (m.K), 25 ℃ C.) | Compressive strength (MPa) | |
| Example 1 | 0.06 | 14 |
| Example 2 | 0.04 | 16 |
| Example 3 | 0.03 | 17 |
| Comparative example 1 | 0.17 | 10 |
| Comparative example 2 | 0.12 | 7 |
| Comparative example 3 | 0.10 | 9 |
As is clear from table 1, the heat insulating material of example 3 has a small thermal conductivity, a high compressive strength, and excellent heat insulating properties and compressive strength.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A construction method of a frozen soil foundation is characterized by comprising the following steps: paving a waterproof material, a heat preservation and insulation material and a foundation in the frozen soil layer from bottom to top in sequence;
the heat-insulating material comprises the following components in parts by weight: SiO 228-17 parts of aerogel, 5-9 parts of polystyrene particles, 2-8 parts of ordinary portland cement, 5-10 parts of polyurethane foam, 8-15 parts of hollow glass microspheres, 3-5 parts of ethylene glycol, 2-4 parts of light ceramsite sand, 5-10 parts of polyethylene, 3-7 parts of basalt fibers and 10-up to 10 DEG of water12 parts.
2. The method for constructing a frozen soil foundation according to claim 1, wherein the thickness of the heat insulating material is 10 to 15 cm.
3. The frozen soil foundation construction method according to claim 1, wherein the waterproof material comprises the following components in parts by weight: 15-25 parts of polyvinyl chloride, 4-8 parts of silicone-acrylic emulsion, 3-5 parts of polyacrylate, 10-15 parts of quartz sand and 6-8 parts of water.
4. The frozen soil foundation construction method according to claim 1, comprising the steps of:
s1, excavating a foundation pit in a frozen soil layer, paving a waterproof material, and rolling the waterproof material;
s2, laying a heat-insulating material on the waterproof material, and rolling the heat-insulating material;
and S3, pouring concrete on the heat insulation material, and backfilling the foundation pit layer by layer after the concrete is hardened.
5. The frozen soil foundation construction method according to claim 4, wherein in step S1, when excavating the foundation pit, when the thickness of the frozen soil layer is less than 0m and less than or equal to 4m, mechanical excavation of the frozen soil layer is adopted; when the thickness of the frozen soil layer is less than or equal to 1.2m in a range of 4m, mechanically crushing the frozen soil layer; and when the thickness of the frozen soil layer less than 1.2m is less than or equal to 2m, excavating the frozen soil by adopting an explosion method.
6. The frozen soil foundation construction method according to claim 5, wherein the rolling frequency of the waterproof material is 3 to 5 times in step S1.
7. The method for constructing a frozen soil foundation according to claim 4, wherein the number of rolling steps of the heat insulating material is 4 to 6 in step S2.
8. The frozen soil foundation construction method according to claim 4, wherein the backfill material is coarse sand or gravel at step S3.
9. The frozen soil foundation construction method according to claim 8, wherein in the step S3, the thickness of each backfill material layer is 100-150 cm.
10. The frozen soil foundation construction method according to claim 9, wherein the backfill material is 300-400 mm higher than the ground in step S3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112484.5A CN113789777A (en) | 2021-09-23 | 2021-09-23 | Frozen soil foundation construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112484.5A CN113789777A (en) | 2021-09-23 | 2021-09-23 | Frozen soil foundation construction method |
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| Publication Number | Publication Date |
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| CN113789777A true CN113789777A (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111112484.5A Pending CN113789777A (en) | 2021-09-23 | 2021-09-23 | Frozen soil foundation construction method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1420900A (en) * | 1973-06-08 | 1976-01-14 | Chemie Linz Ag | Process for preventing fros heaves in soils |
| CN103467039A (en) * | 2013-08-30 | 2013-12-25 | 句容联众科技开发有限公司 | Cement-base waterproof coating and preparation method thereof |
| CN109958120A (en) * | 2019-04-10 | 2019-07-02 | 国网新疆电力有限公司经济技术研究院 | Method of the cold anti-salt of drought-hit area salinized soil every salt |
| CN110627430A (en) * | 2019-08-29 | 2019-12-31 | 安徽天锦云节能防水科技有限公司 | Building floor surface heat-preservation, heat-insulation and sound-insulation material and preparation method thereof |
-
2021
- 2021-09-23 CN CN202111112484.5A patent/CN113789777A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1420900A (en) * | 1973-06-08 | 1976-01-14 | Chemie Linz Ag | Process for preventing fros heaves in soils |
| CN103467039A (en) * | 2013-08-30 | 2013-12-25 | 句容联众科技开发有限公司 | Cement-base waterproof coating and preparation method thereof |
| CN109958120A (en) * | 2019-04-10 | 2019-07-02 | 国网新疆电力有限公司经济技术研究院 | Method of the cold anti-salt of drought-hit area salinized soil every salt |
| CN110627430A (en) * | 2019-08-29 | 2019-12-31 | 安徽天锦云节能防水科技有限公司 | Building floor surface heat-preservation, heat-insulation and sound-insulation material and preparation method thereof |
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Application publication date: 20211214 |
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