CN109437791A - A kind of modified lime soil and preparation method thereof suitable for Han Qu - Google Patents
A kind of modified lime soil and preparation method thereof suitable for Han Qu Download PDFInfo
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- CN109437791A CN109437791A CN201811648273.1A CN201811648273A CN109437791A CN 109437791 A CN109437791 A CN 109437791A CN 201811648273 A CN201811648273 A CN 201811648273A CN 109437791 A CN109437791 A CN 109437791A
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- soil
- quality
- lime
- han
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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
- C04B28/10—Lime cements or magnesium oxide 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- 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
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
-
- 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
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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of modified lime soil suitable for Han Qu, are prepared from the following materials: soil, quality are the lime of the quality 2%~10% of soil, the tossa for the quality 0.10%~1% that quality is soil, steel fibre, the water that quality is native quality 0.10%~1%.The compression strength of modified lime soil, frost resistance enhancing.
Description
Technical field
The invention belongs to Construction Technology fields, and in particular to a kind of suitable for the modified lime soil of Han Qu and its preparation
Method.
Background technique
When constructing roadbed, when without ideal native source, weak soil also can be used as roadbed filling sometimes to be come using at this moment will
It is improved using lime.A certain amount of lime is often mixed in engineering in soil, uniform stirring and form rendzinas.Because rendzinas is held
It is high to carry power, has certain compression strength and tensile strength, while convenient for construction, and is widely used in Roadbed Soil reinforcing.Lime
It is main to play the role of reinforcing soil by improving the cementing power between soil particle, while also making the compressibility decline of soil.
But make in the minimum monthly mean temperature such as China northeast, northwest, Qinghai-Tibet Platean -10 DEG C of severe cold areas below
Used time, there is defects for traditional rendzinas itself, one is frost resistance is insufficient, the frost resistance of rendzinas is compared with other inorganic combinations
Expect low, and rendzinas compression strength is substantially reduced with Frozen-thawed cycled under unfreezing, the reinforcing of subgrade soils in severe cold area
There is material risk in.Secondly being exactly that ductility is poor, because the Dry Shrinkage Performance of rendzinas is fairly obvious, lime is carried out in subgrade soils
Large volume of drying shrinkage can be generated in reinforcing process, increase its brittleness insufficient with ductility, soil layer is caused to crack, and crack meeting
Accelerate rainfall, snowfall it is isotonic enter soil, reduce the intensity of subgrade soils, aggravate the freeze-thaw damage of roadbed.Therefore, these defects are deposited
Rendzinas is being limited in the popularization and application of severe cold area subgrade soils field of reinforcement.
Summary of the invention
It is a kind of suitable for Han Qu technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, providing
Modified lime soil and preparation method thereof, the compression strength of modified lime soil, frost resistance enhancing.
In order to solve the above technical problems, the technical solution adopted by the present invention is that, a kind of modified lime soil suitable for Han Qu,
Be prepared from the following materials: soil, quality are the lime of the quality 2%~10% of soil, the quality 0.10%~1% that quality is soil
Tossa, quality be soil quality 0.10%~1% steel fibre, water.
Further, be prepared from the following materials: soil, quality are the lime of the quality 4% of soil, the quality that quality is soil
Tossa, the water of 0.25% steel fibre, the quality 0.25% that quality is soil.
Further, which is 5~20mm, and diameter is 0.02~0.2mm, and density is 1.0~1.7g/
cm3；The length of steel fiber is 10~35mm, and diameter is 0.08~0.15mm, density 7.85g/cm3。
Invention additionally discloses a kind of above-mentioned preparation method of the modified lime soil suitable for Han Qu, should the preparation method is as follows:
Above-mentioned each raw material is weighed, soil is put into stirring 10min~20min in blender, and revolving speed is 100~150r/min, adds water to soil
In sample, 10min~20min is stirred, lime is added, continued to stir 10min~20min, tossa is then added, continues to stir
Mix 10min~20min, be eventually adding steel fibre, continue stir 10min~20min to get.
A kind of compression strength that 1. modified limes soil is had the advantages that suitable for the modified lime soil of Han Qu of the present invention
Height, relatively common native compression strength improve 6 times or so, and more conventional rendzinas compression strength improves 2 times or so.2. significantly improving
The frost resistance of rendzinas, under thawing ringing, the compression strength of modified lime soil reduces less.3. using fiber with
Link, different interfibrous synergistic effects between soil particle, improve the ductility of rendzinas, the brittleness of modified lime soil is more conventional
The brittleness of rendzinas reduce 250% or so.
Detailed description of the invention
Fig. 1 is unconfined compression strength test figure in the present invention；
Fig. 2 is the unconfined compressive strength comparison diagram of the product in each embodiment and comparative example；
Fig. 3 is SEM detection figure；
Fig. 4 is the brittleness index comparison diagram of the soil body.
Specific embodiment
A kind of modified lime soil suitable for Han Qu of the present invention, is prepared from the following materials: soil, the quality that quality is soil
2%~10% lime, the tossa for the quality 0.10%~1% that quality is soil, the quality 0.10%~1% that quality is soil
Steel fibre, water.The additional amount of water meets: the content of water is 10-20% in modified lime soil.Wet concentration in the present invention is with completely
The local water of sufficient construction requirement.Soil is Roadbed Soil Tu Yuan, meets engineering construction requirement selected from locality.
Further, be prepared from the following materials: soil, quality are the lime of the quality 4% of soil, the quality that quality is soil
Tossa, the water of 0.25% steel fibre, the quality 0.25% that quality is soil.
Further, which is 5~20mm, and diameter is 0.02~0.2mm, and density is 1.0~1.7g/
cm3；The length of steel fiber is 10~35mm, and diameter is 0.08~0.15mm, density 7.85g/cm3。
The invention also discloses a kind of preparation methods of above-mentioned modified lime soil suitable for Han Qu, and the preparation method is such as
Under: above-mentioned each raw material is weighed, soil is put into stirring 10min~20min in blender, and revolving speed is 100~150r/min, adds water to
In soil sample, 10min~20min is stirred, lime is added, continued to stir 10min~20min, tossa is then added, continue
Stir 10min~20min, be eventually adding steel fibre, continue stir 10min~20min to get.
In order to be sufficiently mixed each raw material, soil is ground.The additional amount of water is according to selected soil sample water content
It determines, finally makes the water content 10-20% in product obtained.It is stirred after each raw material is mixed, is subject to and stirs evenly.
In order to verify the performance of the modified lime soil suitable for Han Qu in the present invention better than traditional rendzinas, carry out pair
Than test, each comparative example and embodiment are as shown in table 1:
The component table of table 1 each comparative example and embodiment
The preparation and detection of product in comparative example and embodiment are described in detail below:
Comparative example 2:
One, initial soil sample is put into the thermostatic drying chamber that temperature is 105 DEG C and is dried for 24 hours, placed into ball mill, ground
15min, revolving speed 100r/min.
Two, gained soil sample in one is put into blender and stirs 15min, quality is accounted for drying soil by revolving speed 120r/min
The water of sample quality 18% is added in soil sample, stirs 15min, adds the lime that quality accounts for drying quality of soil sample 4%, continues to stir
15min so just obtains lime soil sample.
Three, lime soil sample obtained in two is fitted into hermetic bag and is sealed, 20 DEG C of constant temperature for 24 hours more than, then by gained stone
Dirt layering is fitted into sample preparation in three petal sample preparation devices, is highly 12.5cm, diameter 6.18cm, and the control of soil sample dry density is made to exist
1.9g/cm3。
Four, lime soil sample obtained in three is put into the freeze-thaw cycle tester that temperature is -18 DEG C for 24 hours, then will
Sample takes out, and places into the freeze-thaw cycle tester that temperature is 18 DEG C for 24 hours, is so a Frozen-thawed cycled.
Five, by four in must undergo freezing-thawing cycles be respectively 0 time, 1 time, 2 times, 3 times and 4 times lime soil sample fill
Enter unconfined compression strength test instrument (TCQ-10 type), carries out unconfined compression strength test.
Simultaneously
Comparative example 3:
One, initial soil sample is put into the thermostatic drying chamber that temperature is 105 DEG C and is dried for 24 hours, place into ball mill (revolving speed
15min is ground for 100r/min).
Two, gained soil sample in one is put into blender and stirs 15min, quality is accounted for drying soil by revolving speed 120r/min
The water of sample quality 18% is added in soil sample, stirs 15min, adds the lime that quality accounts for drying quality of soil sample 4%, continues to stir
Then the steel fibre that quality accounts for drying quality of soil sample 0.25% is added in 15min, continue to stir 15min, after so just obtaining improvement
Lime soil sample.
Three, lime soil sample obtained in two is fitted into hermetic bag and is sealed, 20 DEG C of constant temperature for 24 hours more than, then will be resulting
Improvement rendzinas layering is fitted into sample preparation in three petal sample preparation devices, is highly 12.5cm, diameter 6.18cm makes soil sample dry density control
System is in 1.9g/cm3。
Four, the lime soil sample after three kinds of gained improvement is put into the freeze-thaw cycle tester that temperature is -18 DEG C for 24 hours,
Then sample is taken out, is placed into the freeze-thaw cycle tester that temperature is 18 DEG C for 24 hours, be so a Frozen-thawed cycled.
It five, is respectively rendzinas after 0 time, 1 time, 2 times, 3 times and 4 times improvement by gained experience freezing-thawing cycles in four
Sample is packed into unconfined compression strength test instrument (TCQ-10 type), carries out unconfined compression strength test.
Embodiment 1:
One, initial soil sample is put into the thermostatic drying chamber that temperature is 105 DEG C and is dried for 24 hours, placed into ball mill and grind
15min, revolving speed 100r/min；
Two, gained soil sample in one is put into blender and stirs 15min, quality is accounted for drying soil by revolving speed 120r/min
The water of sample quality 18% is added in soil sample, stirs 15min, adds the lime that quality accounts for drying quality of soil sample 4%, continues to stir
15min, then be added quality account for drying quality of soil sample 0.25% tossa, continue stir 10min~20min, finally plus
Enter the steel fibre that quality accounts for drying quality of soil sample 0.25%, continues to stir 15min, the lime soil sample after so just being improved.
Three, the lime soil sample after gained improvement in two is fitted into hermetic bag and is sealed, 20 DEG C of constant temperature for 24 hours more than, then general
Resulting improvement rendzinas layering is fitted into sample preparation in three petal sample preparation devices, is highly 12.5cm, and diameter 6.18cm keeps soil sample dry
Density domination is in 1.9g/cm3。
Four, the lime soil sample after gained improvement in three is put into the freeze-thaw cycle tester that temperature is -18 DEG C for 24 hours,
Then sample is taken out, is placed into the freeze-thaw cycle tester that temperature is 18 DEG C for 24 hours, be so a Frozen-thawed cycled.
It five, is respectively rendzinas after 0 time, 1 time, 2 times, 3 times and 4 times improvement by gained experience freezing-thawing cycles in four
Sample is packed into unconfined compression strength test instrument (TCQ-10 type), carries out unconfined compression strength test.
Meanwhile unconfined compression strength test is also carried out to the common soil sample in comparative example 1.Each result and comparison such as Fig. 1
It is shown.It can be seen that the compression strength of the rendzinas after improvement from the unconfined compressive strength change curve of sample each in figure
Much higher than common soil, the rendzinas compression strength after the method for the present invention improvement is apparently higher than other three groups, relatively common native pressure resistance
Degree improves 6 times or so, and the rendzinas compression strength not improved improves 2 times or so., meanwhile, carrying out 4 Frozen-thawed cycleds
Afterwards, the rendzinas compression strength after improvement reduces smaller.
SEM detection is carried out to the sample of preparation, as shown in figure 3, Fig. 3 a does not improve rendzinas for comparative example 2, Fig. 3 b is
Improvement rendzinas prepared by embodiment 1.It can be seen from the figure that having between the rendzinas soil particle of the method for the present invention preparation obvious
Fiber link, native globality is preferable, is not susceptible to brittle break.
Deviatoric stress and final deviatoric stress when being destroyed during non-confining compression strength test by the soil body can be counted
Calculation obtains the brittleness index of the soil body, as shown in figure 4, the ductility of the soil body can be reacted.Brittleness index is bigger, and the ductility of the soil body is more not
Foot, is more easy to happen brittle break.It can be concluded that, the brittleness index of the improvement rendzinas prepared in the present invention compares from figure
Common soil in ratio 1 and the rendzinas in comparative example 2 have different degrees of reduction, the rendzinas after the method for the present invention improvement
Brittleness index reduces 250% or so than the rendzinas of comparative example 1.
Unconfined compression strength test is carried out to the product of each embodiment preparation, is compared with the product in comparative example,
As shown in Fig. 2, being improved using the compression strength of the modified lime soil of the method preparation in the present invention.Matching in embodiment 1
Than the compression strength of product is more preferable, and with the increase of number of freezing and thawing, the reduction of compression strength is slower.
Claims (4)
1. a kind of modified lime soil suitable for Han Qu, which is characterized in that be prepared from the following materials: soil, quality are native
The lime of quality 2%~10%, quality are the tossa of the quality 0.10%~1% of soil, the quality 0.10% that quality is soil
~1% steel fibre, water；The additional amount of water meets: the content of water is 10-20% in modified lime soil.
2. a kind of modified lime soil suitable for Han Qu according to claim 1, which is characterized in that prepared by following raw material
Form: soil, quality are the lime of the quality 4% of soil, the steel fibre for the quality 0.25% that quality is soil, the quality that quality is soil
0.25% tossa, water.
3. a kind of modified lime soil suitable for Han Qu according to claim 1 or 2, which is characterized in that the jute is fine
Dimension length is 5~20mm, and diameter is 0.02~0.2mm, and density is 1.0~1.7g/cm3；The length of steel fiber be 10~
35mm, diameter are 0.08~0.15mm, density 7.85g/cm3。
4. a kind of preparation method of modified lime soil suitable for Han Qu of any of claims 1-3, feature exist
In, it should be the preparation method is as follows: weigh above-mentioned each raw material, soil is put into stirring 10min~20min in blender, and revolving speed is 100~
150r/min is added water in soil sample, is stirred 10min~20min, is added lime, continues to stir 10min~20min, then
Be added tossa, continue stir 10min~20min, be eventually adding steel fibre, continue stir 10min~20min to get.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648273.1A CN109437791A (en) | 2018-12-30 | 2018-12-30 | A kind of modified lime soil and preparation method thereof suitable for Han Qu |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648273.1A CN109437791A (en) | 2018-12-30 | 2018-12-30 | A kind of modified lime soil and preparation method thereof suitable for Han Qu |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109437791A true CN109437791A (en) | 2019-03-08 |
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ID=65542174
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811648273.1A Pending CN109437791A (en) | 2018-12-30 | 2018-12-30 | A kind of modified lime soil and preparation method thereof suitable for Han Qu |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS646402A (en) * | 1987-06-29 | 1989-01-11 | Taisei Corp | Soil cement road foundation material containing staple fiber like substance |
| CN1932167A (en) * | 2006-07-25 | 2007-03-21 | 南京大学 | Chopped fiber reinforced rendzinas ground treatment method |
| JP2009243225A (en) * | 2008-03-31 | 2009-10-22 | Railway Technical Res Inst | Method for forming mixture of long fiber-hardener-soil |
| CN105155378A (en) * | 2015-09-02 | 2015-12-16 | 湖州浩诚环境工程有限公司 | Limestone soil road bed construction process |
| CN107698225A (en) * | 2017-10-11 | 2018-02-16 | 中国石油大学(华东) | A kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand and preparation method thereof |
-
2018
- 2018-12-30 CN CN201811648273.1A patent/CN109437791A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS646402A (en) * | 1987-06-29 | 1989-01-11 | Taisei Corp | Soil cement road foundation material containing staple fiber like substance |
| CN1932167A (en) * | 2006-07-25 | 2007-03-21 | 南京大学 | Chopped fiber reinforced rendzinas ground treatment method |
| JP2009243225A (en) * | 2008-03-31 | 2009-10-22 | Railway Technical Res Inst | Method for forming mixture of long fiber-hardener-soil |
| CN105155378A (en) * | 2015-09-02 | 2015-12-16 | 湖州浩诚环境工程有限公司 | Limestone soil road bed construction process |
| CN107698225A (en) * | 2017-10-11 | 2018-02-16 | 中国石油大学(华东) | A kind of Subgrade Filled Soil in High Speed Railway of the low plastic limit silt improvement containing sand and preparation method thereof |
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Address after: 511400 No. 2, West Side of Industrial Fourth Road, Mingzhuwan Starting Zone, Nansha District, Guangzhou City, Guangdong Province Applicant after: China Railway Tunnel Bureau Group Co Ltd Applicant after: China Railway Tunnel Survey and Design Research Institute Co., Ltd. Applicant after: South China University of Technology Address before: 471000 No.3 Hospital of Zhuangyuan Honglu, Laocheng District, Luoyang City, Henan Province Applicant before: China Railway Tunnel Bureau Group Co Ltd Applicant before: China Railway Tunnel Survey and Design Research Institute Co., Ltd. Applicant before: South China University of Technology |
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Application publication date: 20190308 |