CN112194421A - Karst cave filling material based on shield mud and preparation method - Google Patents
Karst cave filling material based on shield mud and preparation method Download PDFInfo
- Publication number
- CN112194421A CN112194421A CN202010901542.1A CN202010901542A CN112194421A CN 112194421 A CN112194421 A CN 112194421A CN 202010901542 A CN202010901542 A CN 202010901542A CN 112194421 A CN112194421 A CN 112194421A
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- China
- Prior art keywords
- filling material
- shield mud
- karst cave
- cave filling
- shield
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention provides a karst cave filling material based on shield mud and a preparation method thereof, and relates to the technical field of building materials. The karst cave filling material based on shield mud comprises the following raw materials in parts by weight: 0.15-0.4 part of cement, 0.03-0.06 part of fly ash, 0.013-0.03 part of mineral powder, 0.01-0.037 part of flocculating agent, 1 part of shield mud, 0.005-0.01 part of water reducing agent and 0.005-0.01 part of early strength agent; the shield mud is waste shield mud comprising lime-series sedimentary rocks, argillaceous cemented sandstones and conglomerates. The karst cave filling material disclosed by the invention has the advantages of environmental friendliness, economy, no good underwater dispersibility and high compressive strength.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a karst cave filling material based on shield mud and a preparation method thereof.
Background
The limestone distribution area of China is wide, and karst strata are filled and covered by secondary weathering or residual matters and are deeply buried underground, so that unpredictable risks are brought to various geotechnical underground engineering, and the engineering quality and the construction safety are directly influenced. With the rapid development of economy in China, the construction scale of infrastructure in various regions is continuously increased, construction risks caused by karst problems are inevitably encountered in the infrastructure construction process, and the construction and development of the infrastructure in China are seriously influenced.
At the present stage, the karst cave backfilling treatment method is a very popular method, the traditional backfilling construction process is complex, the construction difficulty is high, the backfilling period is long, and the backfilling quality is difficult to control. In most projects, the backfill quality is ensured only by adopting plain concrete, and the plain concrete has higher manufacturing cost and higher difficulty and brings difficulty to later construction. Therefore, the development of a green and economic backfill material which is convenient to construct and saves cost is very important.
Disclosure of Invention
Based on the above, it is necessary to provide a karst cave filling material based on shield mud, which adopts the waste shield mud generated in the shield construction process as the main raw material, and makes the material have the advantages of good underwater non-dispersibility and high compressive strength by adjusting the raw material composition and proportion.
A karst cave filling material based on shield mud comprises the following raw materials in parts by weight:
the shield mud is waste shield mud comprising lime-series sedimentary rocks, argillaceous cemented sandstones and conglomerates, wherein the stone content is less than 70%.
The karst cave filling material takes the waste shield mud as a main raw material, is matched with other raw materials, and improves the underwater non-dispersibility and compressive strength of the material by adjusting a proper proportion; the shield mud used in the invention is waste shield mud generated in the capital construction process, and the waste is utilized, thereby being beneficial to protecting the environment; the shield mud contains lime sedimentary rock, argillaceous cemented sandstone and conglomerate, the main components are silicon dioxide, halloysite and a small amount of iron-containing mineral substances, and a flocculating agent enables the main components to generate ionic bonds or covalent bonds with the surface of the silicon dioxide, so that the functions of compressing a double electric layer, adsorbing rock particles and protecting raw materials are achieved. Meanwhile, the mixture can form a stable space flexible network structure through the bridge action of the high polymer long chain of the flocculating agent among soil particles and between soil and aggregate, the cohesive force of the fresh filling material is improved, the dispersion and segregation of the fresh filling material are limited, the soil loss is avoided, the particle grading of the shield mud is uniform, particles with larger particle size are uniformly distributed in the shield mud, the shield mud can better play a role of a framework, the fine particles are filled among the framework particles, and the large particles and the small particles are bonded together to form small group state distribution, so that the karst cave filling material has the advantages of good underwater non-dispersibility and high compressive strength.
In one embodiment, the water-saving paint also comprises 0.22-0.45 part of water.
In one embodiment, the cement is selected from portland cement 42.5.
In one embodiment, the fly ash is selected from national standard secondary fly ash.
In one embodiment, the ore fines are selected from grade S95 ore fines.
In one embodiment, the flocculant is selected from UWB-type ii underwater undispersed concrete flocculants. The UWB-II type underwater undispersed concrete flocculant is produced by the Central Petroleum institute.
In one embodiment, the water reducer is selected from concrete polycarboxylic acid water reducers. Preferably, a common concrete polycarboxylate water reducer is adopted, such as JS-3000 polycarboxylate water reducer produced by Guangzhou Jiansheng.
In one embodiment, the early strength agent is selected from chlorine salt type early strength agents. The chlorine salt type early strength agent is selected from: one or more of calcium chloride, sodium chloride, potassium chloride, amine oxide, ferric chloride and aluminum chloride.
In one embodiment, the cavern filling material comprises the following raw materials in parts by weight:
the invention also provides a preparation method of the karst cave filling material based on the shield mud, which comprises the following steps:
and uniformly mixing the cement, the fly ash, the mineral powder, the flocculating agent, the shield mud, the water reducing agent, the early strength agent and the water to obtain the karst cave filling material based on the shield mud.
The karst cave filling material prepared by the method has the advantages of good underwater non-dispersibility and high compressive strength, can be applied to karst cave backfilling, greatly reduces the karst cave backfilling cost, and does not increase difficulty for later construction.
Compared with the prior art, the invention has the following beneficial effects:
the karst cave filling material takes the waste shield mud as a main raw material, is matched with other raw materials, and improves the underwater non-dispersibility and compressive strength of the material by adjusting a proper proportion; the shield mud used in the invention is waste shield mud generated in the capital construction process, and the waste is utilized, thereby being beneficial to protecting the environment; the shield mud contains lime sedimentary rock, argillaceous cemented sandstone and conglomerate, the main components are silicon dioxide, halloysite and a small amount of iron-containing mineral substances, and a flocculating agent enables the main components to generate ionic bonds or covalent bonds with the surface of the silicon dioxide, so that the functions of compressing a double electric layer, adsorbing rock particles and protecting raw materials are achieved. Meanwhile, the mixture can form a stable space flexible network structure through the bridge action of the high polymer long chain of the flocculating agent among soil particles and between soil and aggregate, the cohesive force of the fresh filling material is improved, the dispersion and segregation of the fresh filling material are limited, the soil loss is avoided, the particle grading of the shield mud is uniform, particles with larger particle size are uniformly distributed in the shield mud, the shield mud can better play a role of a framework, the fine particles are filled among the framework particles, and the large particles and the small particles are bonded together to form small group state distribution, so that the karst cave filling material has the advantages of good underwater non-dispersibility and high compressive strength.
The karst cave filling material prepared by the preparation method disclosed by the invention has the advantages of good underwater non-dispersibility and high compressive strength, can be applied to karst cave backfilling, greatly reduces the karst cave backfilling cost, and does not increase difficulty for later construction.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the preferred embodiments. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
A karst cave filling material based on shield mud is prepared by the following method:
(1) weighing 286g of Portland cement 42.5, 57g of national standard second-level fly ash, 21g S95-level mineral powder, 14g of UWB-II type underwater undispersed concrete flocculant, 1000g of shield mud, 10g of common type concrete polycarboxylic acid water reducing agent (JS-3000) and 10g of ferric chloride (early strength agent); wherein the shield mud is waste shield mud consisting of lime-series sedimentary rock, argillaceous cemented sandstone and conglomerate;
(2) mixing the above materials, adding 429g water, and stirring.
Example 2
A karst cave filling material based on shield mud is prepared by the following method:
(1) 357g of Portland cement 42.5, 71g of national standard second-level fly ash, 21g S95-level mineral powder, 14g of UWB-II type underwater non-dispersible concrete flocculant, 1000g of shield mud, 10g of common type concrete polycarboxylic acid water reducer (JS-3000) and 10g of calcium chloride (early strength agent) are weighed; wherein the shield mud is waste shield mud consisting of lime-series sedimentary rock, argillaceous cemented sandstone and conglomerate;
(2) mixing the above materials, adding 357g water, and stirring.
Example 3
A karst cave filling material based on shield mud is prepared by the following method:
(1) weighing 175g of Portland cement 42.5, 38g of national standard second-level fly ash, 21g S95-level mineral powder, 32g of UWB-II type underwater undispersed concrete flocculant, 1000g of shield mud, 8g of common type concrete polycarboxylic acid water reducing agent (JS-3000) and 8g of ferric chloride (early strength agent); wherein the shield mud is waste shield mud consisting of lime-series sedimentary rock, argillaceous cemented sandstone and conglomerate;
(2) mixing the above materials, adding 302g water, and stirring.
Example 4
A karst cave filling material based on shield mud is prepared by the following method:
(1) weighing 227g of Portland cement 42.5, 45g of national standard second-level fly ash, 18g S95-level mineral powder, 37g of UWB-II type underwater undispersed concrete flocculant, 1000g of shield mud, 8g of common type concrete polycarboxylic acid water reducer (JS-3000) and 8g of potassium chloride (early strength agent); wherein the shield mud is waste shield mud consisting of lime-series sedimentary rock, argillaceous cemented sandstone and conglomerate;
(2) mixing the above materials, adding 227g water, and stirring.
Example 5
A karst cave filling material based on shield mud is prepared by the following method:
(1) weighing 162g of Portland cement 42.5, 32g of national standard second-level fly ash, 13g S95-level mineral powder, 24g of UWB-II type underwater undispersed concrete flocculant, 1000g of shield mud, 8g of common type concrete polycarboxylic acid water reducing agent (JS-3000) and 8g of aluminum chloride (early strength agent); wherein the shield mud is waste shield mud consisting of lime-series sedimentary rock, argillaceous cemented sandstone and conglomerate;
(2) mixing the above materials, adding 373g water, and stirring.
Comparative example 1
A cavern filling material substantially as in example 1, except that no flocculating agent is used.
Comparative example 2
A cavern filling material substantially the same as in example 1 except that triethanolamine is used instead of ferric chloride as an early strength agent.
Comparative example 3
A cave-filling material substantially the same as in example 1 except that 500g of a flocculating agent for UWB-II type underwater undispersed concrete was used.
Experimental example 1
The performance of the karst cave filling materials of the examples and the comparative examples is tested by referring to GB/T50081-. The test results are given in the following table:
TABLE 1. results of Performance test of the cavern filling Material
As can be seen from the above table, the cave filling material of the embodiment of the invention has small slump, which shows that the material has good underwater non-dispersibility and high 28d average compressive strength. The cavern filling material of the comparative examples 1-2 has poor underwater dispersibility and small 28d average compressive strength; comparative example 3 flocculant addition was too much, poor in economy and not significant in effect.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The karst cave filling material based on shield mud is characterized by comprising the following raw materials in parts by weight:
the shield mud is waste shield mud comprising lime-series sedimentary rocks, argillaceous cemented sandstones and conglomerates, wherein the stone content is less than 70%.
2. The shield mud-based karst cave filling material of claim 1, further comprising 0.22-0.45 parts of water.
3. The shield mud-based karst cave filling material of claim 1, wherein the cement is selected from portland cement 42.5.
4. The shield-mud-based karst cave filling material of claim 1, wherein the fly ash is selected from national standard secondary fly ash.
5. The shield mud-based karst cave filling material of claim 1, wherein the ore powder is selected from S95 grade ore powder.
6. The shield mud-based karst cave filling material of claim 1, wherein the flocculant is selected from UWB-ii type underwater undispersed concrete flocculant.
7. The shield mud-based karst cave filling material of claim 1, wherein the water reducer is selected from concrete polycarboxylic acid water reducers.
8. The shield mud-based karst cave filling material of claim 1, wherein the early strength agent is selected from chloride-based early strength agents.
9. The karst cave filling material based on the shield mud as claimed in any one of claims 1 to 8, wherein the karst cave filling material comprises the following raw materials in parts by weight:
10. the preparation method of the shield mud-based karst cave filling material according to any one of claims 1 to 9, characterized by comprising the following steps:
and uniformly mixing the cement, the fly ash, the mineral powder, the flocculating agent, the shield mud, the water reducing agent, the early strength agent and the water to obtain the karst cave filling material based on the shield mud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010901542.1A CN112194421A (en) | 2020-09-01 | 2020-09-01 | Karst cave filling material based on shield mud and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010901542.1A CN112194421A (en) | 2020-09-01 | 2020-09-01 | Karst cave filling material based on shield mud and preparation method |
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| CN112194421A true CN112194421A (en) | 2021-01-08 |
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| CN202010901542.1A Pending CN112194421A (en) | 2020-09-01 | 2020-09-01 | Karst cave filling material based on shield mud and preparation method |
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Citations (6)
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| US20130334046A1 (en) * | 2012-06-15 | 2013-12-19 | International Business Machines Corporation | Nanopore device wetting |
| CN103951335A (en) * | 2013-12-13 | 2014-07-30 | 中铁十四局集团有限公司 | Synchronous grouting method for recycling large-diameter waste slurry generated during slurry shield |
| CN106977153A (en) * | 2017-03-08 | 2017-07-25 | 中交第二航务工程局有限公司 | The shield synchronous grouting serous fluid and its construction method prepared using shield discarded slurry |
| CN107311561A (en) * | 2017-06-22 | 2017-11-03 | 同济大学 | It is a kind of for 3D printing cement-based material of underwater construction and preparation method thereof |
| CN107344830A (en) * | 2017-08-09 | 2017-11-14 | 中铁隧道集团二处有限公司 | A kind of method that shield grouting is prepared using discarded slurry |
| CN110295947A (en) * | 2019-08-05 | 2019-10-01 | 中南大学 | A kind of shield tunnel solution-cavity filling method |
-
2020
- 2020-09-01 CN CN202010901542.1A patent/CN112194421A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130334046A1 (en) * | 2012-06-15 | 2013-12-19 | International Business Machines Corporation | Nanopore device wetting |
| CN103951335A (en) * | 2013-12-13 | 2014-07-30 | 中铁十四局集团有限公司 | Synchronous grouting method for recycling large-diameter waste slurry generated during slurry shield |
| CN106977153A (en) * | 2017-03-08 | 2017-07-25 | 中交第二航务工程局有限公司 | The shield synchronous grouting serous fluid and its construction method prepared using shield discarded slurry |
| CN107311561A (en) * | 2017-06-22 | 2017-11-03 | 同济大学 | It is a kind of for 3D printing cement-based material of underwater construction and preparation method thereof |
| CN107344830A (en) * | 2017-08-09 | 2017-11-14 | 中铁隧道集团二处有限公司 | A kind of method that shield grouting is prepared using discarded slurry |
| CN110295947A (en) * | 2019-08-05 | 2019-10-01 | 中南大学 | A kind of shield tunnel solution-cavity filling method |
Non-Patent Citations (1)
| Title |
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| 刘红飞: "《建筑外加剂》", 28 February 2006 * |
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