CN110143800A - A kind of silt modification method - Google Patents
A kind of silt modification method Download PDFInfo
- Publication number
- CN110143800A CN110143800A CN201910497814.3A CN201910497814A CN110143800A CN 110143800 A CN110143800 A CN 110143800A CN 201910497814 A CN201910497814 A CN 201910497814A CN 110143800 A CN110143800 A CN 110143800A
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- China
- Prior art keywords
- parts
- silt
- cement
- modification method
- flyash
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- C04B28/10—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
- C04B2111/0075—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
- 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 discloses a kind of silt modification method, include the following steps: to weigh by weight: 80~100 parts of low liquid limit silt；2.4~5 parts of cement；3.2~6 parts of lime；2.4~5 parts of lignin；0.3~0.5 part of diethylenetriamine pentacarboxylic acid sodium；0.4~1 part of polyalcohol；0.56~1.2 part of acrylic emulsion；1.6~3 parts of flyash；1.28~2.4 parts of SILICA FUME；Cement, lime, flyash are placed in mixed at high speed blender, after stirring 0.5~1h, lignin, diethylenetriamine pentacarboxylic acid sodium, polyalcohol, SILICA FUME and acrylic emulsion are successively sprayed while stirring, after the completion of addition, resulting mixture is mixed with weighed low liquid limit silt, water is added to mix and stir to get roadbed filling.The present invention can not only improve the unconfined compressive strength and water stability, the permeability and compressibility and brittleness that reduce the soil of composite soil, it is ensured that its intensity.
Description
Technical field
The present invention relates to express highway roadbed filler fields, and in particular to a kind of silt modification method.
Background technique
Silt is distributed widely in alluvial plain, fluvial-delta, the coastal plain area in China, and the particle of silt is uniform,
Partial size is single, and sticky poor, disproportionately graded, liquid limit value is small, and plasticity index is low, and intensity is low, California bearing ratio CBR (California
Bearing Ratio) it is not easy to reach engineering design requirements, it is a kind of road-making material that engineering properties is poor.Low liquid limit silt is
Silt for liquid limit less than 50%, this silt soil sample gradation is poor, soil body compressibility with higher and permeability, even if pressing
Still there is up to 9%~10% porosity in the very high situation of solidity, does not reach really closely knit, provided for the infiltration of rainwater
Convenient and fast channel so that the deformation for roadbed provides condition, therefore cannot be directly used to filling roadbed.
In order to enhance the strength and stability of silt roadbed, various regions according to the origin cause of formation of silt and physical property it is different often
Roadbed improvement is carried out using different methods.The existing improvement to silt is mainly carried out from the following aspects: (1) improving soil
Mechanical property, increase soil cohesion and internal friction angle, effectively improve soil classifiction, improve soil consolidation characteristics and can
Compactibility；(2) endurance qualities such as water rationality, water stability, frost resistance and resistance to drying and watering cycle ability of enhancing soil；(3) ensure that it is strong
Degree and durability constantly increase with the continuity of time；(4) application range for expanding earth material keeps available earth material Area distribution wide
General, raw material is very sufficient；(5) economic cost is reduced.And the mode improved mainly mixes two-ash soil, cement, quick lime etc. often
With the industrial wastes such as inorganic binder or incorporation slag, cement miberal powder, phosphoric acid or curing agent is added.
Now, it by a variety of evolutionary approach to low liquid limit silt, can satisfy the performance of low liquid limit silt substantially
It is used for road construction as common roadbed material, however, causing existing due to the limitation of silt material self performance or improved formulations
Some low liquid limit silts improvement properties of roadbed material is unsatisfactory, and that there are mechanical properties is not high, water stability is poor, improvement cost
High many defects make existing low liquid limit silt improvement roadbed material that can't be used for the roadbed construction of high standard road, from
And extensive use of the low liquid limit silt in road construction is seriously limited, it also increases and geographically carries out road construction in silt
Construction cost.
Summary of the invention
To solve the above problems, the present invention provides a kind of silt modification method, can not only improve conditioned soil without side
Limit compression strength and water stability, the permeability and compressibility and brittleness for reducing the soil, it is ensured that its intensity is successfully prepared
The roadbed filling that intensity and toughness have both.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of silt modification method, includes the following steps:
S1, each component is weighed by weight:
80~100 parts of low liquid limit silt；2.4~5 parts of cement；3.2~6 parts of lime；2.4~5 parts of lignin；Diethylenetriamine
0.3~0.5 part of pentacarboxylic acid sodium；0.4~1 part of polyalcohol；0.56~1.2 part of acrylic emulsion；1.6~3 parts of flyash；Micro- silicon
1.28~2.4 parts of powder；
S2, weighed cement, lime, flyash are placed in mixed at high speed blender, stir 0.5~1h after, while stirring according to
Secondary spraying lignin, diethylenetriamine pentacarboxylic acid sodium, polyalcohol, SILICA FUME and acrylic emulsion, the spraying time of every kind of raw material
Control obtains mixture after the completion of 20~30min, addition；
S3, resulting mixture is mixed with weighed low liquid limit silt, water is added to mix and stir to get roadbed filling.
Further, in the step S3, the moisture content of roadbed filling is 12%~15%.
Further, in the step S3, the time for adding water to mix and stir is 30~45min.
The invention has the following advantages:
The unconfined compressive strength and water stability, the permeability and compressibility that reduce the soil of low plastic limit silt can not only be improved
And brittleness, it is ensured that its intensity is successfully prepared the roadbed filling that intensity and toughness have both.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
Embodiment 1
A kind of silt modification method, characterized by the following steps:
S1, each component is weighed by weight:
80 parts of low liquid limit silt；2.4 parts of cement；3.2 parts of lime；2.4 parts of lignin；0.3 part of diethylenetriamine pentacarboxylic acid sodium；
0.4 part of polyalcohol；0.56 part of acrylic emulsion；1.6 parts of flyash；1.28 parts of SILICA FUME；
S2, weighed cement, lime, flyash are placed in mixed at high speed blender, after stirring 0.5h, are successively sprayed while stirring
Spread lignin, diethylenetriamine pentacarboxylic acid sodium, polyalcohol, SILICA FUME and acrylic emulsion, the spraying time control of every kind of raw material
After the completion of 20min, addition, mixture is obtained；
S3, resulting mixture is mixed with weighed low liquid limit silt, adds water to mix and stir 30min to get roadbed filling, roadbed is filled out
The moisture content of material is 12%~15%.
Embodiment 2
A kind of silt modification method, characterized by the following steps:
S1, each component is weighed by weight:
100 parts of low liquid limit silt；5 parts of cement；6 parts of lime；5 parts of lignin；0.5 part of diethylenetriamine pentacarboxylic acid sodium；It is polynary
1 part of alcohol；1.2 parts of acrylic emulsion；3 parts of flyash；2.4 parts of SILICA FUME；
S2, weighed cement, lime, flyash are placed in mixed at high speed blender, after stirring 1h, are successively sprayed while stirring
The spraying time control of lignin, diethylenetriamine pentacarboxylic acid sodium, polyalcohol, SILICA FUME and acrylic emulsion, every kind of raw material exists
30min after the completion of addition, obtains mixture；
S3, resulting mixture is mixed with weighed low liquid limit silt, adds water to mix and stir 45min to get roadbed filling, roadbed is filled out
The moisture content of material is 12%~15%.
Embodiment 3
A kind of silt modification method, characterized by the following steps:
S1, each component is weighed by weight:
90 parts of low liquid limit silt；3.7 parts of cement；4.6 parts of lime；3.7 parts of lignin；0.4 part of diethylenetriamine pentacarboxylic acid sodium；
0.7 part of polyalcohol；0.88 part of acrylic emulsion；2.4 parts of flyash；1.8 parts of SILICA FUME；
S2, weighed cement, lime, flyash are placed in mixed at high speed blender, after stirring 0.75h, while stirring successively
Spray lignin, diethylenetriamine pentacarboxylic acid sodium, polyalcohol, SILICA FUME and acrylic emulsion, the spraying time control of every kind of raw material
System obtains mixture after the completion of 25min, addition；
S3, resulting mixture is mixed with weighed low liquid limit silt, water is added to mix and stir 37.5min to get roadbed filling, roadbed
The moisture content of filler is 12%~15%.
Roadbed filling prepared by embodiment 1- embodiment 2 is carried out evaluation using unconfined compressive strength (UCS) test to add
Gu effect assessment.After sample shaping and demoulding, it is put into fog room and carries out standard curing (20 ± 2 DEG C of temperature, relative humidity >=95%),
Test result is as shown in table 1.
| It is saturated unconfined compressive strength/7d(kPa) | Residual strength (axial strain 15%) (kPa) | |
| Embodiment 1 | 615.7 | 451.3 |
| Embodiment 2 | 597.8 | 318.9 |
| Embodiment 3 | 545.1 | 382.3 |
Acrylic resin can be increasingly generated after acrylic emulsion in the present invention is reacted, between can be filled inside silt
Gap improves its impermeability, while the high tenacity that acrylic resin itself has imparts the stronger mechanical resistant power performance of silt；Wood
Quality sodium sulfonate can be effectively improved the grain composition of silt, reduce the plasticity index of the soil body；The maximum dry density of silt after improvement
Increase, optimum moisture content reduces, while dry density enhances the sensibility of water-cut variation；Diethylenetriamine pentacarboxylic acid sodium can
The activity of nonactive mixing material in effective excited cement, additionally it is possible to the activity of admixture flyash and SILICA FUME in silt is excited,
To improve the intensity of silt.And after diethylenetriamine pentacarboxylic acid sodium, polyalcohol meet water, it will form a large amount of carboxyl and hydroxyl,
Due to intermolecular force, these polar groups are adsorbed onto cement particle surface, can destroy non-active material surface it is smooth, cause
Close Si-O-Si key and Si-O-Al key and its network structure make crystal structure generate defect, accelerate its dissociation and aquation, thus
The intensity of silt can be improved to greatest extent.These three-dimensional macromolecular structures are adsorbed on the surface of the material from each orientation, are mutually handed over
Fork, increases silt early anaphase intensity after molding.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (3)
1. a kind of silt modification method, characterized by the following steps:
S1, each component is weighed by weight:
80~100 parts of low liquid limit silt；2.4~5 parts of cement；3.2~6 parts of lime；2.4~5 parts of lignin；Diethylenetriamine
0.3~0.5 part of pentacarboxylic acid sodium；0.4~1 part of polyalcohol；0.56~1.2 part of acrylic emulsion；1.6~3 parts of flyash；Micro- silicon
1.28~2.4 parts of powder；
S2, weighed cement, lime, flyash are placed in mixed at high speed blender, stir 0.5~1h after, while stirring according to
Secondary spraying lignin, diethylenetriamine pentacarboxylic acid sodium, polyalcohol, SILICA FUME and acrylic emulsion, the spraying time of every kind of raw material
Control obtains mixture after the completion of 20~30min, addition；
S3, resulting mixture is mixed with weighed low liquid limit silt, water is added to mix and stir to get roadbed filling.
2. a kind of silt modification method as described in claim 1, it is characterised in that: in the step S3, roadbed filling contains
Water rate is 12%~15%.
3. a kind of silt modification method as described in claim 1, it is characterised in that: in the step S3, add that water mixes and stirs when
Between be 30~45min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497814.3A CN110143800A (en) | 2019-06-10 | 2019-06-10 | A kind of silt modification method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497814.3A CN110143800A (en) | 2019-06-10 | 2019-06-10 | A kind of silt modification method |
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| Publication Number | Publication Date |
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| CN110143800A true CN110143800A (en) | 2019-08-20 |
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| CN201910497814.3A Pending CN110143800A (en) | 2019-06-10 | 2019-06-10 | A kind of silt modification method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698122A (en) * | 2019-11-18 | 2020-01-17 | 山东大学 | Ecological light filler and preparation method thereof |
| CN110938436A (en) * | 2019-12-11 | 2020-03-31 | 陇东学院 | Anti-hydrophobic soil stabilizer and preparation method thereof |
| CN110965417A (en) * | 2019-12-19 | 2020-04-07 | 陇东学院 | Method for constructing anti-dredging road |
| CN111072339A (en) * | 2019-11-29 | 2020-04-28 | 山东省交通科学研究院 | Silt composite curing agent and silt curing method |
| CN111268951A (en) * | 2020-03-25 | 2020-06-12 | 长安大学 | Improved low-liquid-limit silt roadbed material and preparation method and application thereof |
| CN111875326A (en) * | 2020-07-31 | 2020-11-03 | 新疆新工勘岩土工程勘察设计院有限公司 | Reinforcing material for earthen site and preparation method and application thereof |
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| CN201485765U (en) * | 2009-08-25 | 2010-05-26 | 科达集团股份有限公司 | Novel low liquid limit silty soil subgrade |
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Non-Patent Citations (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698122A (en) * | 2019-11-18 | 2020-01-17 | 山东大学 | Ecological light filler and preparation method thereof |
| CN111072339A (en) * | 2019-11-29 | 2020-04-28 | 山东省交通科学研究院 | Silt composite curing agent and silt curing method |
| CN110938436A (en) * | 2019-12-11 | 2020-03-31 | 陇东学院 | Anti-hydrophobic soil stabilizer and preparation method thereof |
| CN110965417A (en) * | 2019-12-19 | 2020-04-07 | 陇东学院 | Method for constructing anti-dredging road |
| CN111268951A (en) * | 2020-03-25 | 2020-06-12 | 长安大学 | Improved low-liquid-limit silt roadbed material and preparation method and application thereof |
| CN111875326A (en) * | 2020-07-31 | 2020-11-03 | 新疆新工勘岩土工程勘察设计院有限公司 | Reinforcing material for earthen site and preparation method and application thereof |
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Application publication date: 20190820 |