CN116535154A - High-strength tunnel residual mud residue soil brick and preparation method thereof - Google Patents
High-strength tunnel residual mud residue soil brick and preparation method thereof Download PDFInfo
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- CN116535154A CN116535154A CN202310218295.9A CN202310218295A CN116535154A CN 116535154 A CN116535154 A CN 116535154A CN 202310218295 A CN202310218295 A CN 202310218295A CN 116535154 A CN116535154 A CN 116535154A
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- 239000002689 soil Substances 0.000 title claims abstract description 195
- 239000011449 brick Substances 0.000 title claims abstract description 78
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 54
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 51
- -1 polypropylene Polymers 0.000 claims abstract description 35
- 239000004743 Polypropylene Substances 0.000 claims abstract description 34
- 229920001155 polypropylene Polymers 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000010802 sludge Substances 0.000 claims abstract description 26
- 239000004568 cement Substances 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000000748 compression moulding Methods 0.000 claims abstract description 8
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000010453 quartz Substances 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 59
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 55
- 239000002699 waste material Substances 0.000 claims description 53
- 239000004576 sand Substances 0.000 claims description 48
- 239000002245 particle Substances 0.000 claims description 45
- 239000000292 calcium oxide Substances 0.000 claims description 31
- 235000012255 calcium oxide Nutrition 0.000 claims description 31
- 238000001035 drying Methods 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 28
- 239000002002 slurry Substances 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 15
- 238000012216 screening Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims 2
- 238000004064 recycling Methods 0.000 abstract description 11
- 239000011398 Portland cement Substances 0.000 description 18
- 239000004575 stone Substances 0.000 description 14
- 238000001816 cooling Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 239000004566 building material Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000010847 non-recyclable waste Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
- C04B28/04—Portland cements
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a high-strength tunnel residual soil brick and a preparation method thereof, wherein the high-strength tunnel residual soil brick comprises the following raw materials in parts by weight: 30-80 parts of tunnel residual soil, 15-20 parts of cement, 10-15 parts of water and 0.01-0.03 part of fiber; wherein the fibers comprise polypropylene fibers, and the tunnel sludge residue soil comprises at least one of quartz and kaolin. The Gao Jiangyu sludge-residue soil brick is prepared by taking the tunnel sludge-residue soil generated in tunnel engineering as a main raw material, adding cement, fiber and the like and performing one-time compression molding, the invention aims to improve the comprehensive utilization rate and the additional value of the tunnel sludge-residue soil, provides a way for recycling the tunnel sludge-residue soil, and has important significance for recycling the resources.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a high-strength tunnel residual mud and residue soil brick and a preparation method thereof.
Background
With the rapid development of economy and society, urban construction is increasingly accelerated, and capital construction projects are increasingly increased. At present, most of the residual sludge generated in engineering is directly consumed and discarded, which causes obvious ecological and environmental protection problems. The resource utilization of the residual mud and the dregs is particularly necessary and urgent, and the development of the resource utilization technology of the residual mud and the dregs of the shield tunnel can effectively realize the safe treatment and the resource recycling of wastes, promote the construction of ecological civilization, and has very important significance for reducing occupied land, avoiding environmental pollution, constructing fine cities and constructing resource-saving society.
Disclosure of Invention
The invention mainly aims to provide a high-strength tunnel residual mud and residue soil brick and a preparation method thereof, aims to improve the comprehensive utilization rate and additional value of tunnel residual mud and residue soil, and provides a way for recycling the tunnel residual mud and residue soil.
In order to achieve the purpose, the high-strength tunnel residual mud and residue soil brick provided by the invention comprises the following raw materials in parts by weight: 30-80 parts of tunnel residual soil, 15-20 parts of cement, 10-15 parts of water and 0.01-0.03 part of fiber;
wherein the fibers comprise polypropylene fibers, and the tunnel sludge residue soil comprises at least one of quartz and kaolin.
Optionally, the high-strength tunnel sludge residue soil brick further comprises quicklime, wherein the quicklime is 0.01-4 parts.
Optionally, the quicklime comprises medium-speed lime, and the content of effective calcium oxide in the medium-speed lime is 86-88%.
Optionally, the high-strength tunnel residual sludge soil brick further comprises a skeleton mixture, wherein the skeleton mixture is 0.01-40 parts.
Optionally, the skeletal mixture includes medium fine sand and waste glass; wherein:
the medium fine sand comprises at least one of natural sand, artificial sand and reclaimed sand;
the waste glass comprises coarse glass, fine glass and glass powder.
Optionally, the skeletal mixture includes medium fine sand and waste glass, the ratio of medium fine sand to waste glass being 10: (1-1.5).
In addition, the invention also provides a preparation method of the high-strength tunnel residual mud and residue soil brick, which comprises the following steps:
screening and collecting residual sludge and soil of a tunnel;
drying the residual soil of the tunnel, and crushing to obtain residue soil particles;
mixing cement, slag soil particles, quicklime, a framework composition and fibers, uniformly stirring, adding water, and uniformly stirring again to obtain slurry;
and injecting the slurry into a mould, and performing compression molding to obtain the high-strength tunnel residual mud and residue soil bricks.
Optionally, in the step of drying the tunnel residual soil and crushing to obtain the residue soil particles, the particle size of the residue soil particles is not more than 5mm.
Optionally, in the step of drying the tunnel sludge residue soil and crushing to obtain residue soil particles, the drying temperature is 100-110 ℃ and the drying time is 23-25 h.
Optionally, the cement, the residue soil particles, the quicklime, the framework composition and the fibers are mixed and stirred uniformly, water is added, and stirring is performed again uniformly, so that the slurry is obtained, and the stirring time is 8-15 min.
In the technical scheme of the invention, the tunnel residual soil is used as a raw material, the cost is low, the operability is high, meanwhile, the tunnel residual soil is used as a raw material, the problem of treatment of the soil in the tunnel excavation process is solved, the comprehensive utilization rate and the additional value of the tunnel residual soil are improved, a way is provided for recycling the tunnel residual soil, in addition, the chemical components in the tunnel residual soil mainly comprise silicon dioxide, aluminum oxide, ferric oxide, calcium oxide and the like which are similar to main components in sand stone, so that partial sand stone can be replaced to be used as a framework, the energy is saved, meanwhile, the porosity of the tunnel residual soil is small after compression molding, the strength is high, the building material standard is met, the fiber is used as an auxiliary additive, the effect of improving the ageing resistance and the corrosion resistance of the high-strength tunnel residual soil brick is also improved, and the deformation of the high-strength tunnel residual soil brick is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of an embodiment of a method for preparing a high-strength tunnel residual soil brick according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
With the rapid development of economy and society, urban construction is increasingly accelerated, and capital construction projects are increasingly increased. At present, most of the residual sludge generated in engineering is directly consumed and discarded, which causes obvious ecological and environmental protection problems. The resource utilization of the residual mud and the dregs is particularly necessary and urgent, and the development of the resource utilization technology of the residual mud and the dregs of the shield tunnel can effectively realize the safe treatment and the resource recycling of wastes, promote the construction of ecological civilization, and has very important significance for reducing occupied land, avoiding environmental pollution, constructing fine cities and constructing resource-saving society.
In view of the above, the invention provides a high-strength tunnel residual soil brick, which adopts tunnel residual soil as a main material, improves the comprehensive utilization rate and additional value of the tunnel residual soil, and provides a way for recycling the tunnel residual soil; specifically, the high-strength tunnel residual mud and residue soil brick comprises the following components:
30-80 parts of tunnel residual soil, 15-20 parts of cement, 10-15 parts of water and 0.01-0.03 part of fiber; wherein the fiber comprises polypropylene fiber, and the residual sludge soil comprises at least one of quartz and kaolin.
In the technical scheme of the invention, the tunnel residual soil is used as a raw material, the cost is low, the operability is high, meanwhile, the tunnel residual soil is used as a raw material, the problem of treatment of the soil in the tunnel excavation process is solved, the comprehensive utilization rate and the additional value of the tunnel residual soil are improved, a way is provided for recycling the tunnel residual soil, in addition, the chemical components in the tunnel residual soil mainly comprise silicon dioxide, aluminum oxide, ferric oxide, calcium oxide and the like which are similar to main components in sand stone, so that partial sand stone can be replaced to be used as a framework, the energy is saved, meanwhile, the porosity of the tunnel residual soil is small after compression molding, the strength is high, the building material standard is met, the fiber is used as an auxiliary additive, the effect of improving the ageing resistance and the corrosion resistance of the high-strength tunnel residual soil brick is also improved, and the deformation of the high-strength tunnel residual soil brick is avoided.
Further, in this embodiment, the fiber is preferably polypropylene fiber, the polypropylene fiber is lighter in weight and higher in strength, and when the polypropylene fiber is added into the residual soil of the tunnel, the connection strength between the molecules of the residual soil of the tunnel can be improved, the self strength of the residual soil brick of the high-strength tunnel is improved, so that the polypropylene fiber meets the requirements of building materials, and further, the hygroscopicity and the dyeability of the polypropylene fiber are worst in the chemical fiber, hardly absorb moisture, the moisture regain is less than 0.03%, and the polypropylene fiber is added into the residual soil brick of the high-strength tunnel, so that the water absorbability of the residual soil brick of the high-strength tunnel can be reduced, the residual soil brick of the high-strength tunnel can be kept in a dry state, and the influence on the living use due to the high-strength residual soil brick of the high-strength tunnel caused by the high-humidity of the construction of the residual soil brick of the high-strength tunnel is avoided; meanwhile, the polypropylene fiber has poor dyeing property, light color and poor dyeing fastness, and the residual mud and soil brick of the high-strength tunnel cannot be easily changed in color; furthermore, the polypropylene fiber has high resistivity (7 multiplied by 1019 ohm cm) and small heat conductivity, and compared with other chemical fibers, the polypropylene fiber has the best electrical insulation property and heat retention property, so that the heat conductivity of the high-strength tunnel residual soil bricks can be reduced by adding the polypropylene fiber into the high-strength tunnel residual soil bricks, and the houses prepared by the high-strength tunnel residual soil bricks are good in heat retention property, warm in winter and cool in summer and suitable for residence; meanwhile, the polypropylene fiber has better corrosion resistance, in particular to microbial corrosion resistance, and the polypropylene fiber is added into the high-strength tunnel residual mud and soil brick, so that the corrosion resistance of the polypropylene fiber can be improved, and the service life of the polypropylene fiber can be prolonged.
Further, in some embodiments, the high strength tunnel sludge residue soil brick further comprises quicklime, wherein the quicklime is 0.01-4 parts. The main chemical components in the tunnel residual soil are silicon dioxide, aluminum oxide, ferric oxide, calcium oxide and the like, so that the tunnel residual soil, cement, quicklime and the like can react to generate products such as calcium hydroxide, CSH and the like with certain strength, the products can be filled in the holes of the tunnel residual soil, the strength of the high-strength tunnel residual soil bricks is improved, in addition, the quicklime can provide sufficient calcium hydroxide after being dissolved in water, the reaction of the tunnel residual soil with the products is promoted, and the strength of the high-strength tunnel residual soil bricks is improved.
Further, in the present embodiment, the quicklime includes medium-speed lime, and the content of effective calcium oxide in the medium-speed lime is 86 to 88%. In the range, the method can ensure that the residual sludge and soil of the tunnel fully reacts with the quicklime to generate more calcium hydroxide, so that the strength of the high-strength residual sludge and soil brick of the tunnel is ensured; as a preferred embodiment of this embodiment, the effective calcium oxide content of the medium speed lime is 87.32%.
In some embodiments, the high-strength tunnel residual soil brick further includes a skeleton mixture, where the skeleton mixture is 0.01-40 parts, specifically, the skeleton mixture is used to serve as a skeleton supporting function, to increase strength of the finally prepared high-strength tunnel residual soil brick, generally, sand and stone are often selected as the skeleton to support, in this embodiment, the problem of recycling resources is considered, and the main components of the waste glass are the same as those of the sand, so that the waste glass is selected to replace part of sand, thereby realizing reutilization of the waste resources, specifically, the skeleton mixture includes sand and waste glass, and the sand is mainly selected as the medium fine sand.
Further, the skeletal mixture includes medium fine sand and/or waste glass; wherein: the medium fine sand comprises at least one of natural sand, artificial sand and reclaimed sand; the waste glass comprises coarse glass, fine glass and glass powder. In this embodiment, the medium fine sand is used as a skeleton support, and the chemical composition similarity between the waste glass and the medium fine sand is high, so that in order to utilize waste resources to a greater extent, in this embodiment, part of the medium fine sand is replaced by adding the waste glass.
It should be noted that reuse of waste resources and sustainable development of environment are important points of current research, and waste glass cannot be recycled, so that waste glass fragments can be applied to residual mud and slag soil of a tunnel in a 'skeleton' form, and the consumption of cement and medium fine sand is reduced, so that the purpose of resource recycling is achieved. However, the glass is a fragile material and has poor working performance, and if the waste glass is directly applied to the residual soil of the tunnel, the waste glass is secondarily crushed in the stirring process, so that the mechanical property of the residual soil of the tunnel is reduced; therefore, in order to avoid secondary breakage of the waste glass during stirring, the glass needs to be pretreated first, and the waste glass pieces are ground into glass pieces with different particle sizes and glass powder, specifically, in this embodiment, three glass pieces with different particle sizes need to be used, including: coarse glass blocks of 5.0-25 mm, fine glass blocks of 1.5-3.7 mm and glass powder of 0.055-0.075 mm, wherein the coarse glass blocks and the fine glass blocks are used as 'frameworks' in the concrete, so that the use amount of sand grains is reduced, and the glass powder is used as a gel in the concrete, so that the use amount of cement powder is reduced. Therefore, the mechanical property of the finally prepared glass powder concrete can be ensured, and the aim of recycling waste can be achieved.
Specifically, in some embodiments, the ratio of the medium fine sand to the waste glass is 10: (1-1.5). As a preferred embodiment of this embodiment, the ratio of the medium fine sand to the waste glass is 10:1.
in addition, the invention also provides a preparation method of the high-strength tunnel residual soil brick, referring to fig. 1, the preparation method of the high-strength tunnel residual soil brick comprises the following steps:
and S10, screening and collecting the residual sludge of the tunnel.
In the implementation, a large amount of residual mud and residue soil generated by tunnel excavation is used, so that the resource utilization is realized, and the environment is protected; specifically, in actual operation, firstly, the abandoned soil excavated by the tunnel is collected, the soil is manually sorted, some abandoned garbage, shells, larger stones and other sundries in the residual soil of the tunnel are selected, the residual soil of the tunnel is obtained, the purpose of screening the soil is to select some non-recyclable wastes, the influence of the wastes on the strength of the prepared high-strength residual soil bricks of the tunnel is avoided, and the service life of the high-strength residual soil bricks of the tunnel is prolonged.
And step S20, drying the tunnel residual silt soil, and crushing to obtain silt particles.
In performing step S20, it may be performed by: placing the tunnel sludge residue soil in a drying box, adjusting the temperature of the drying box to 100-110 ℃, drying for 23-25 h, taking out, cooling to 20-28 ℃, and crushing into residue soil particles with the particle size not more than 5mm by adopting a hammer crusher. Specifically, the purpose of drying the tunnel sludge residue soil is to remove redundant moisture, facilitate transportation and storage, and the purpose of crushing the tunnel sludge residue soil is to increase the contact area between the tunnel sludge residue soil and substances (such as quicklime) in the subsequent steps, fully react with the quicklime, generate more calcium hydroxide, and further ensure the strength of the finally prepared high-strength tunnel sludge residue soil bricks.
Step S30, mixing and uniformly stirring cement, slag soil particles, quicklime, a framework composition and fibers, adding water, and uniformly stirring again to obtain slurry;
specifically, in this embodiment, waste glass is first collected, ground and mashed, filtered with a 5.0 to 25mm screen to obtain a coarse glass block, the coarse glass block is filtered with a 1.5 to 3.7mm screen to obtain a fine glass block, and a part of the fine glass block is ground and crushed and filtered with a 0.055 to 0.075mm screen to obtain glass frit. Mixing coarse glass, fine glass and glass powder with medium fine sand to obtain a skeleton composition, mixing cement, slag particles, quicklime, the skeleton composition and fibers, wherein in the step, the raw materials are mixed in a dry state (namely, water is not required to be added), one purpose is to uniformly mix the raw materials, the other purpose is to avoid caking, influence the strength of the finally prepared high-strength tunnel residual soil brick, and after the raw materials are uniformly mixed, water is added, and stirring is carried out for 8-15 min, so that the slurry can be obtained.
In this embodiment, the cement is preferably Portland cement, the strength grade is not less than 42.5, and the medium fine sand includes any one of natural sand, artificial sand and reclaimed sand, preferably natural sand.
And S40, injecting the slurry into a die, and performing compression molding to obtain the high-strength tunnel residual sludge soil brick.
In some embodiments, the slurry is injected into a mould, and is subjected to one-time compression molding under a certain pressure, and then natural curing is carried out to obtain the high-strength tunnel residual sludge soil brick; according to the invention, the tunnel residual soil produced in tunnel engineering is taken as a main raw material, cement, quicklime, medium fine sand and the like are added, the Gao Jiangyu mud residue soil brick is prepared by one-time compression molding, and meanwhile, the waste glass is added in raw materials, so that the mechanical properties of the waste glass are not affected, the waste glass can be recycled for the second time, and the development and the utilization of resources are facilitated; the invention aims to improve the comprehensive utilization rate and the additional value of the residual soil of the tunnel, provides a way for the resource utilization of the residual soil of the tunnel, and has important significance.
The following technical solutions of the present invention will be described in further detail with reference to specific examples and drawings, and it should be understood that the following examples are only for explaining the present invention and are not intended to limit the present invention.
Example 1
The main components of the high-strength tunnel residual soil brick comprise 80 parts of tunnel residual soil, 20 parts of ordinary Portland cement, 0.01 part of polypropylene fiber and 10 parts of water.
The high-strength tunnel residual mud and residue soil brick is prepared according to the following steps:
(1) Collecting the excavated waste soil of the tunnel, manually sorting the soil, and selecting out some waste garbage, shells, larger stones and other sundries in the soil to obtain the residual soil of the tunnel;
(2) Placing the tunnel residual mud and dregs in a drying box, heating the temperature of the drying box to 105 ℃, maintaining for 24 hours, then taking out, cooling to 23 ℃ to obtain dry block-shaped tunnel residual mud and dregs, crushing by a hammer crusher, and screening by a screen to obtain dregs particles with the particle size of less than 5 mm;
(3) Mixing 80 parts of dregs particles, 20 parts of ordinary Portland cement and 0.01 part of polypropylene fiber, uniformly stirring, adding 10 parts of water, and stirring for 10min to obtain slurry;
(4) And (3) injecting the slurry into a mould, forming at one time under the pressure of 10MPa, and naturally curing to obtain the high-strength tunnel residual mud and soil bricks.
Example 2
The main components of the high-strength tunnel residual soil brick comprise 80 parts of tunnel residual soil, 20 parts of ordinary Portland cement, 0.01 part of polypropylene fiber and 10 parts of water.
The high-strength tunnel residual mud and residue soil brick is prepared according to the following steps:
(1) Collecting the excavated waste soil of the tunnel, manually sorting the soil, and selecting out some waste garbage, shells, larger stones and other sundries in the soil to obtain the residual soil of the tunnel;
(2) Placing the tunnel residual mud and dregs in a drying box, heating the temperature of the drying box to 105 ℃, maintaining for 24 hours, then taking out, cooling to 23 ℃ to obtain dry block-shaped tunnel residual mud and dregs, crushing by a hammer crusher, and screening by a screen to obtain dregs particles with the particle size of less than 5 mm;
(3) Mixing 80 parts of dregs particles, 20 parts of ordinary Portland cement and 0.01 part of polypropylene fiber, uniformly stirring, adding 10 parts of water, and stirring for 10min to obtain slurry;
(4) And (3) injecting the slurry into a mould, forming at one time under the pressure of 14MPa, and naturally curing to obtain the high-strength tunnel residual mud and soil bricks.
Example 3
The main components of the high-strength tunnel residual soil brick comprise 80 parts of tunnel residual soil, 20 parts of ordinary Portland cement, 0.01 part of polypropylene fiber and 12 parts of water.
The high-strength tunnel residual mud and residue soil brick is prepared according to the following steps:
(1) Collecting the excavated waste soil of the tunnel, manually sorting the soil, and selecting out some waste garbage, shells, larger stones and other sundries in the soil to obtain the residual soil of the tunnel;
(2) Placing the tunnel residual mud and dregs in a drying box, heating the temperature of the drying box to 105 ℃, maintaining for 24 hours, then taking out, cooling to 23 ℃ to obtain dry block-shaped tunnel residual mud and dregs, crushing by a hammer crusher, and screening by a screen to obtain dregs particles with the particle size of less than 5 mm;
(3) Mixing 80 parts of dregs particles, 20 parts of ordinary Portland cement and 0.01 part of polypropylene fiber, uniformly stirring, adding 10 parts of water, and stirring for 10min to obtain slurry;
(4) And (3) injecting the slurry into a mould, forming at one time under the pressure of 12MPa, and naturally curing to obtain the high-strength tunnel residual mud and soil bricks.
Example 4
The main components of the high-strength tunnel residual soil brick comprise 80 parts of tunnel residual soil, 16 parts of ordinary Portland cement, 4 parts of quicklime, 0.01 part of polypropylene fiber and 12 parts of water.
The high-strength tunnel residual mud and residue soil brick is prepared according to the following steps:
(1) Collecting the excavated waste soil of the tunnel, manually sorting the soil, and selecting out some waste garbage, shells, larger stones and other sundries in the soil to obtain the residual soil of the tunnel;
(2) Placing the tunnel residual mud and dregs in a drying box, heating the temperature of the drying box to 105 ℃, maintaining for 24 hours, then taking out, cooling to 23 ℃ to obtain dry block-shaped tunnel residual mud and dregs, crushing by a hammer crusher, and screening by a screen to obtain dregs particles with the particle size of less than 5 mm;
(3) Mixing 80 parts of dregs particles, 20 parts of ordinary Portland cement and 0.01 part of polypropylene fiber, uniformly stirring, adding 10 parts of water, and stirring for 10min to obtain slurry;
(4) And (3) injecting the slurry into a mould, forming at one time under the pressure of 12MPa, and naturally curing to obtain the high-strength tunnel residual mud and soil bricks.
Example 5
The main components of the high-strength tunnel residual soil brick comprise 30 parts of tunnel residual soil, 30 parts of ordinary Portland cement, 40 parts of framework composition (in the framework composition, the volume ratio of artificial sand to waste glass is 10:1), 0.02 part of polypropylene fiber and 15 parts of water.
The high-strength tunnel residual mud and residue soil brick is prepared according to the following steps:
(1) Collecting the excavated waste soil of the tunnel, manually sorting the soil, and selecting out some waste garbage, shells, larger stones and other sundries in the soil to obtain the residual soil of the tunnel;
(2) Placing the tunnel residual mud and dregs in a drying box, heating the temperature of the drying box to 105 ℃, maintaining for 24 hours, then taking out, cooling to 23 ℃ to obtain dry block-shaped tunnel residual mud and dregs, crushing by a hammer crusher, and screening by a screen to obtain dregs particles with the particle size of less than 5 mm;
(3) Mixing 80 parts of dregs particles, 20 parts of ordinary Portland cement and 0.01 part of polypropylene fiber, uniformly stirring, adding 10 parts of water, and stirring for 10min to obtain slurry;
(4) And (3) injecting the slurry into a mould, forming at one time under the pressure of 10MPa, and naturally curing to obtain the high-strength tunnel residual mud and soil bricks.
Example 6
The main components of the high-strength tunnel residual soil brick comprise 45 parts of tunnel residual soil, 15 parts of ordinary Portland cement, 40 parts of framework composition (in the framework composition, the volume ratio of artificial sand to waste glass is 10:1), 0.01 part of polypropylene fiber and 10 parts of water.
The high-strength tunnel residual mud and residue soil brick is prepared according to the following steps:
(1) Collecting the excavated waste soil of the tunnel, manually sorting the soil, and selecting out some waste garbage, shells, larger stones and other sundries in the soil to obtain the residual soil of the tunnel;
(2) Placing the tunnel residual mud and dregs in a drying box, heating the temperature of the drying box to 105 ℃, maintaining for 24 hours, then taking out, cooling to 23 ℃ to obtain dry block-shaped tunnel residual mud and dregs, crushing by a hammer crusher, and screening by a screen to obtain dregs particles with the particle size of less than 5 mm;
(3) Mixing 80 parts of dregs particles, 20 parts of ordinary Portland cement and 0.01 part of polypropylene fiber, uniformly stirring, adding 10 parts of water, and stirring for 10min to obtain slurry;
(4) And (3) injecting the slurry into a mould, forming at one time under the pressure of 10MPa, and naturally curing to obtain the high-strength tunnel residual mud and soil bricks.
Example 7
The main components of the high-strength tunnel residual soil brick comprise 50 parts of tunnel residual soil, 15 parts of ordinary Portland cement, 3 parts of quicklime, 40 parts of skeleton composition (in the skeleton composition, the volume ratio of artificial sand to waste glass is 10:1), 0.03 part of polypropylene fiber and 25 parts of water.
The high-strength tunnel residual mud and residue soil brick is prepared according to the following steps:
(1) Collecting the excavated waste soil of the tunnel, manually sorting the soil, and selecting out some waste garbage, shells, larger stones and other sundries in the soil to obtain the residual soil of the tunnel;
(2) Placing the tunnel residual mud and dregs in a drying box, heating the temperature of the drying box to 105 ℃, maintaining for 24 hours, then taking out, cooling to 23 ℃ to obtain dry block-shaped tunnel residual mud and dregs, crushing by a hammer crusher, and screening by a screen to obtain dregs particles with the particle size of less than 5 mm;
(3) Mixing 80 parts of dregs particles, 20 parts of ordinary Portland cement and 0.01 part of polypropylene fiber, uniformly stirring, adding 10 parts of water, and stirring for 10min to obtain slurry;
(4) And (3) injecting the slurry into a mould, forming at one time under the pressure of 12MPa, and naturally curing to obtain the high-strength tunnel residual mud and soil bricks.
Example 8
The main components of the high-strength tunnel residual soil brick comprise 50 parts of tunnel residual soil, 15 parts of ordinary Portland cement, 3 parts of quicklime, 40 parts of medium fine sand, 0.03 part of polypropylene fiber and 25 parts of water.
The high-strength tunnel residual mud and residue soil brick is prepared according to the following steps:
(1) Collecting the excavated waste soil of the tunnel, manually sorting the soil, and selecting out some waste garbage, shells, larger stones and other sundries in the soil to obtain the residual soil of the tunnel;
(2) Placing the tunnel residual mud and dregs in a drying box, heating the temperature of the drying box to 105 ℃, maintaining for 24 hours, then taking out, cooling to 23 ℃ to obtain dry block-shaped tunnel residual mud and dregs, crushing by a hammer crusher, and screening by a screen to obtain dregs particles with the particle size of less than 5 mm;
(3) Mixing 80 parts of dregs particles, 20 parts of ordinary Portland cement and 0.01 part of polypropylene fiber, uniformly stirring, adding 10 parts of water, and stirring for 10min to obtain slurry;
(4) And (3) injecting the slurry into a mould, forming at one time under the pressure of 12MPa, and naturally curing to obtain the high-strength tunnel residual mud and soil bricks.
Comparative example
And mixing the ordinary Portland cement and the sand according to the conventional proportion to prepare the ordinary cement brick.
Performance testing
The tunnel sludge prepared in examples 1 to 8, and the ordinary cement bricks prepared in comparative examples were subjected to compression and fracture resistance tests, and the test results are shown in table 1.
Table 1 test results
As can be seen from Table 1, the high-strength tunnel residual sludge soil bricks prepared by the method have excellent tensile strength and flexural strength performance, and meet the stipulated standards of building materials.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, but various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The high-strength tunnel residual mud and residue soil brick is characterized by comprising the following raw materials in parts by weight: 30-80 parts of tunnel residual soil, 15-20 parts of cement, 10-15 parts of water and 0.01-0.03 part of fiber;
wherein the fibers comprise polypropylene fibers, and the tunnel sludge residue soil comprises at least one of quartz and kaolin.
2. The high strength tunnel sludge residual soil brick of claim 1, further comprising quicklime, wherein the quicklime is 0.01-4 parts.
3. The high strength tunnel sludge block as claimed in claim 2, wherein the quicklime comprises medium speed lime having an effective calcium oxide content of 86-88%.
4. The high strength tunnel residual soil brick according to claim 1, further comprising a skeletal mixture, wherein the skeletal mixture is 0.01-40 parts.
5. The high strength tunnel residual soil block according to claim 4, wherein said skeletal mixture comprises medium fine sand and/or waste glass; wherein:
the medium fine sand comprises at least one of natural sand, artificial sand and reclaimed sand;
the waste glass comprises coarse glass, fine glass and glass powder.
6. The high strength tunnel residual soil block of claim 5, wherein said skeletal mixture comprises medium fine sand and waste glass, said medium fine sand and said waste glass being present in a ratio of 10: (1-1.5).
7. The preparation method of the high-strength tunnel residual mud and soil brick is characterized by comprising the following steps of:
screening and collecting residual sludge and soil of a tunnel;
drying the residual soil of the tunnel, and crushing to obtain residue soil particles;
mixing cement, slag soil particles, quicklime, a framework composition and fibers, uniformly stirring, adding water, and uniformly stirring again to obtain slurry;
and injecting the slurry into a mould, and performing compression molding to obtain the high-strength tunnel residual mud and residue soil bricks.
8. The method for preparing a high-strength tunnel residual soil block according to claim 7, wherein in the step of drying and pulverizing the tunnel residual soil to obtain the residue soil particles, the particle size of the residue soil particles is not more than 5mm.
9. The method for preparing a high-strength tunnel residual soil block according to claim 7, wherein in the step of drying and pulverizing the tunnel residual soil to obtain the residue soil particles, the drying temperature is 100-110 ℃ and the drying time is 23-25 h.
10. The method for preparing a high-strength tunnel residual soil brick according to claim 7, wherein the step of mixing cement, slag particles, quicklime, a skeleton composition and fibers and stirring uniformly, adding water, stirring uniformly again, and obtaining a slurry is carried out for 8-15 min.
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