CN106049212A - Improved roadbed filling material based on low liquid limit silt and a manufacturing method thereof - Google Patents

Improved roadbed filling material based on low liquid limit silt and a manufacturing method thereof Download PDF

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Publication number
CN106049212A
CN106049212A CN201610618082.5A CN201610618082A CN106049212A CN 106049212 A CN106049212 A CN 106049212A CN 201610618082 A CN201610618082 A CN 201610618082A CN 106049212 A CN106049212 A CN 106049212A
Authority
CN
China
Prior art keywords
silt
roadbed
liquid limit
low liquid
roadbed embankment
Prior art date
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.)
Pending
Application number
CN201610618082.5A
Other languages
Chinese (zh)
Inventor
李成现
黄明利
李瀛
张怀宾
朱鸿章
李柏青
王松
张志恩
刘晖
马跃东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Municipal Construction Co Ltd
Original Assignee
Beijing Municipal Construction Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Municipal Construction Co Ltd filed Critical Beijing Municipal Construction Co Ltd
Priority to CN201610618082.5A priority Critical patent/CN106049212A/en
Publication of CN106049212A publication Critical patent/CN106049212A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00Foundations for pavings
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/10Lime cements or magnesium oxide cements
    • C04B28/12Hydraulic lime
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075Uses not provided for elsewhere in C04B2111/00 for road construction

Abstract

The invention discloses an improved roadbed filling material based on low liquid limit silt and a manufacturing method thereof, and belongs to the technical field of roadbed filling materials, wherein the improved roadbed filling materials comprise the following ingredients in the following proportion through being metered according to the total weight of the substrate filling materials: 2 to 4 percent of lime, 2 to 4 percent of fly ash and the balance silt. The lime and fly ash mixture is used for improving the low liquid limit silt; the permeability and the compaction performance of the low liquid limit silt can be reduced; the water stability of the roadbed filling soil is improved; in addition, the soil body intensity can be improved when the roadbed deformation is reduced; the improved silt can be used for highway roadbed filling materials; the building cost of a highway can be reduced.

Description

A kind of roadbed embankment material based on the improvement of low liquid limit silt and manufacture method
Technical field
The present invention relates to roadbed filling technical field, particularly relate to a kind of based on silt improvement roadbed embankment material and Manufacture method.
Background technology
Silt, silt be distributed widely in the alluvial plain of China, fluvial-delta, coastal plain area, this kind of native one As viscosity poor, disproportionately graded, liquid limit be worth little plasticity index low, intensity is low, California bearing ratio CBR (California Bearing Ratio) it is difficult to reach engineering design requirements, is the poor road-making material of a kind of engineering properties, this low liquid limit silt soil sample Grating is poor, and the soil body has higher compressibility and permeability, is used as the compacting of roadbed filling difficulty and compaction quality is difficult to ensure that, the soil body Intensity can not meet the code requirement of roadbed filling, therefore cannot be directly used to filling roadbed, is especially not applied at a high speed The High-Grade Highway Subgrade such as highway.In " Highway Roadbed Construction Technology specification ", not yet clear stipulaties uses silt, silt at present Fill the provision of High-Grade Highway Subgrade.
Summary of the invention
It is an object of the invention to for the problem that presently, there are, it is provided that a kind of roadbed based on the improvement of low liquid limit silt is filled out Building material and preparation method thereof, it can solve the problem that low liquid limit silt cannot be directly used to fill asking of High-Grade Highway Subgrade Topic.
The purpose of the present invention is achieved through the following technical solutions:
The present invention provide a kind of based on low liquid limit silt improvement roadbed embankment material, described roadbed embankment material according to The gross weight meter of roadbed embankment material, each composition and proportioning be: Calx 2%~4%, flyash 2%~4%, remaining is flour sand Soil.
It is highly preferred that described roadbed embankment material according to the gross weight meter of roadbed embankment material, the proportioning of each composition is: stone Ash 3%, flyash 3%, remaining is silt.
It is highly preferred that described Calx uses the Calx after clearing up.
It is highly preferred that the loss on ignition of described flyash is not more than 10%, specific surface area is more than 2500cm2/g, and 90% passes through The sieve aperture of 0.3mm, 70% by the sieve aperture of 0.075mm.
It is highly preferred that the coarse fraction of described silt is less than 25%, liquid limit value is less than 50%.
The present invention also provides for the manufacture method of a kind of roadbed embankment material based on the improvement of low liquid limit silt, comprising:
Step S11, according to roadbed embankment material total amount needed for engineering and the road described in claim 1 to 5 any one The proportioning of base filling material is got the raw materials ready;
Step S12, is mixed and stirred Calx and flyash as in optimum mix incorporation silt;
Step S13, adds water and is sufficiently stirred for;
Step S14, stands and sets time period, the silt roadbed embankment material after being improved.
By the technical scheme of the invention described above it can be seen that the present invention has the following technical effect that
The present invention can not only reduce the permeability of this low liquid limit silt, compressibility, improves the water stability of Roadbed Soil, and And soil strength can be increased while reducing subgrade deformation, the silt after improvement may be used for express highway roadbed filling out Material, can reduce expressway construction cost.
Accompanying drawing explanation
Fig. 1 is the flow process of the manufacture method of a kind of based on the improvement of low liquid limit silt the roadbed embankment material of the present invention Figure.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the technical scheme of the application, below with reference to accompanying drawing to this Bright it is described in further details.
The applicant carries out laboratory soil test to the silt of job site, analyzes its engineering mechanics property, this flour sand Soil is low liquid limit silt, there is the shortcomings such as its permeability is big, compressibility is big, soil strength is inadequate, and the applicant is for low liquid Limit these shortcomings of silt, use Calx and flyash to improve low liquid limit silt, and the silt after improvement can For express highway roadbed filler.
The present invention provides a kind of roadbed embankment material based on the improvement of low liquid limit silt, and it is according to roadbed embankment material Gross weight meter, the proportioning of each composition is: Calx 2%~4%, flyash 2%~4%, and remaining is silt.
Calx: require to meet the requirement of each index of more than three grades of ashes, use the Calx cleared up.
Flyash: loss on ignition is not more than 10%, specific surface area is more than 2500cm2/g, and 90% by the sieve aperture of 0.3mm, 70% by the sieve aperture of 0.075mm.
Low liquid limit silt: coarse fraction is less than 25%, liquid limit value is less than 50%.
Embodiment one:
According to the gross weight meter of roadbed embankment material, the proportioning of each composition is: Calx 2%, flyash 2%, and remaining is powder Sand.
Embodiment two:
According to the gross weight meter of roadbed embankment material, the proportioning of each composition is: Calx 2%, flyash 4%, and remaining is powder Sand.
Embodiment three:
According to the gross weight meter of roadbed embankment material, the proportioning of each composition is: Calx 4%, flyash 2%, and remaining is powder Sand.
Embodiment four:
Calx 3%, flyash 3%, remaining is silt.
Embodiment five:
Calx 4%, flyash 4%, remaining is silt.
Above-described embodiment is sampled, is compressed test, CBR test, permeability test survey, determines that its engineering mechanics parameter is full The requirement of foot " Highway Roadbed Construction Technology specification ".Result of the test is as shown in table 1:
Table 1
By above-mentioned table 1 it can be seen that match ratio be Calx 3%, flyash 3%, remaining be the detection of low liquid limit silt The CBR value of soil sample is maximum, and performance is optimal, and this is also the optimum proportioning of the present invention.
The present invention also provides for a kind of manufacture method of roadbed embankment material based on the improvement of low liquid limit silt, it include as Lower step:
Step S11, gets the raw materials ready according to roadbed embankment material total amount and proportioning needed for engineering.
Silt need to sieve, and granularity is 0.005mm~0.35mm, wherein more than the content < 50% of 0.075mm particle diameter.
Step S12, is mixed and stirred Calx and flyash as in optimum mix incorporation silt.
Step S13, adds water and is sufficiently stirred for, and amount of water is pressed the optimum moisture content of silt and calculated.
Step S14, stands and sets time period (as stood 30min), the silt roadbed embankment material after being improved.
Although the present invention is open as above with preferred embodiment, but embodiment does not limit the present invention.Without departing from this In bright spirit and scope, any equivalence change done or retouching, also belong to the protection domain of the present invention.Therefore the present invention The content that should be defined with claims hereof of protection domain as standard.

Claims (6)

1. one kind based on low liquid limit silt improvement roadbed embankment material, it is characterised in that described roadbed embankment material according to The gross weight meter of roadbed embankment material, each composition and proportioning be: Calx 2%~4%, flyash 2%~4%, remaining is flour sand Soil.
A kind of roadbed embankment material based on the improvement of low liquid limit silt the most according to claim 1, it is characterised in that institute Stating the roadbed embankment material gross weight meter according to roadbed embankment material, the proportioning of each composition is: Calx 3%, flyash 3%, its Remaining is silt.
A kind of roadbed embankment material based on the improvement of low liquid limit silt the most according to claim 1 and 2, its feature exists In, described Calx uses the Calx after clearing up.
A kind of roadbed embankment material based on the improvement of low liquid limit silt the most according to claim 3, it is characterised in that institute The loss on ignition stating flyash is not more than 10%, and specific surface area is more than 2500cm2/g, and 90% by the sieve aperture of 0.3mm, and 70% passes through The sieve aperture of 0.075mm.
A kind of roadbed embankment material based on the improvement of low liquid limit silt the most according to claim 4, it is characterised in that institute The coarse fraction stating silt is less than 25%, and liquid limit value is less than 50%.
6. the manufacture method of a roadbed embankment material based on the improvement of low liquid limit silt, it is characterised in that described making side Method includes:
Step S11, fills out according to roadbed embankment material total amount needed for engineering and the roadbed described in claim 1 to 5 any one The proportioning building material is got the raw materials ready;
Step S12, is mixed and stirred Calx and flyash as in optimum mix incorporation silt;
Step S13, adds water and is sufficiently stirred for;
Step S14, stands and sets time period, the silt roadbed embankment material after being improved.
CN201610618082.5A 2016-07-29 2016-07-29 Improved roadbed filling material based on low liquid limit silt and a manufacturing method thereof Pending CN106049212A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610618082.5A CN106049212A (en) 2016-07-29 2016-07-29 Improved roadbed filling material based on low liquid limit silt and a manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610618082.5A CN106049212A (en) 2016-07-29 2016-07-29 Improved roadbed filling material based on low liquid limit silt and a manufacturing method thereof

Publications (1)

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CN106049212A true CN106049212A (en) 2016-10-26

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106747190A (en) * 2016-12-14 2017-05-31 武汉理工大学 A kind of early strength micro expansion type soil-solidified-agent and preparation method
CN108358529A (en) * 2018-05-04 2018-08-03 中铁二十三局集团第工程有限公司 A kind of compound improvement roadbed material of low liquid limit silt and preparation method thereof
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001163657A (en) * 1999-12-07 2001-06-19 Inax Corp Humidity-controlling finish coating material and humidity-controlling building material
CN102690098A (en) * 2012-04-24 2012-09-26 武汉工程大学 Roadbed filler for road and preparation method of roadbed filler
CN103214224A (en) * 2013-04-17 2013-07-24 河南大学 Compound stabilizing method for silty soil in Yellow River flooded areas

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001163657A (en) * 1999-12-07 2001-06-19 Inax Corp Humidity-controlling finish coating material and humidity-controlling building material
CN102690098A (en) * 2012-04-24 2012-09-26 武汉工程大学 Roadbed filler for road and preparation method of roadbed filler
CN103214224A (en) * 2013-04-17 2013-07-24 河南大学 Compound stabilizing method for silty soil in Yellow River flooded areas

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
关文学等: "二灰稳定黄河粉砂土的强度影响因素", 《山东交通科技》 *
王栋: "改良土的工程性质及其在秦沈客运专线路基工程中的应用", 《中国学位论文全文数据库》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106747190A (en) * 2016-12-14 2017-05-31 武汉理工大学 A kind of early strength micro expansion type soil-solidified-agent and preparation method
CN108358529A (en) * 2018-05-04 2018-08-03 中铁二十三局集团第工程有限公司 A kind of compound improvement roadbed material of low liquid limit silt and preparation method thereof
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

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Application publication date: 20161026

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