CN106638196A - Improved expansive soil roadbed filling and preparation method thereof - Google Patents
Improved expansive soil roadbed filling and preparation method thereof Download PDFInfo
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- CN106638196A CN106638196A CN201611129124.5A CN201611129124A CN106638196A CN 106638196 A CN106638196 A CN 106638196A CN 201611129124 A CN201611129124 A CN 201611129124A CN 106638196 A CN106638196 A CN 106638196A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
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Abstract
The invention relates to the field of roadbed filling and discloses an improved expansive soil roadbed filling and a preparation method of the improved expansive soil roadbed filling. The improved expansive soil roadbed filling comprises expansive soil, polymeric aluminum and slaked lime. By adopting the improved expansive soil roadbed filling provided by the invention, the improvement effect is good, the improvement on th expansion property is remarkable and stable, and the method is low in cost and is environmentally friendly.
Description
Technical field
The present invention relates to roadbed filling field, in particular it relates to a kind of stabilized expansive soil roadbed filling, one kind improvement expansion
The preparation method of dirt road based filler, the stabilized expansive soil roadbed filling prepared by the method.
Background technology
Used as the important component part of whole traffic and transportation system, it directly bears superstructure load to roadbed and vehicle is quiet
The long term of dynamic load, and the quality of roadbed quality directly affects road speed and traffic safety, it is therefore necessary to using excellent
The roadbed filling of matter is filled.However, bad subgrade filler swelled ground is widely distributed, swelled ground has obvious swell-shrink characteristic, super solid
Knot property and many fissurities, to subgrade construction construction sizable harm is brought.Road foundation construction is carried out in expansion soil site
When, the filler in natural place does not meet high-grade highway, the basic demand that railway bed is filled.
During current expansion soil site highway, construction of railways, generally using remote transport, the purchase of building stones factory, admixture
The methods such as the inorganic binders such as lime, cement improvement are guaranteeing the premium properties of filler.But filled out by remote high-quality of transporting
Material certainly will cause that subgrade engineering cost is too high, the duration is long, therefore combine construction local condition, be filled out by stabilized expansive soil roadbed
Material, the basic demand for being allowed to meet operation after roadbed filling and work is become as a subgrade engineering construction difficult problem urgently to be resolved hurrily.
Patent application CN105951551A discloses a kind of modification method of subgrade in swelling soil zone, the method layering or point multilayer
Quick lime and swelled ground are piled up, watering while layer makes lime fully digest.But the gel of lime and swelled ground is anti-
Should carry out relatively slowly, there is a problem of that early strength is not high.Secondly, the technical process is more complicated, takes long, easily causes the duration
Prolongation.In addition, easy airborne dust when mixing quick lime, can cause certain pollution to environment.
Patent application CN102162241A discloses a kind of method of use waste carbide slag stabilized expansive soil roadbed filling, should
Method carbide slag is used as curing agent stabilized expansive soil roadbed；Carbide slag is spiked in swelled ground, moisture content is controlled for 18-
20%, it is sufficiently stirred for making it uniform, the volume of carbide slag is：The quality of dry carbide slag is the 6-10% of swelled ground dry mass.Should
The problem that method is present includes：Limited larger by raw material calcium carbide slag, need from the grown place of carbide slag to transport, it is relatively costly.
Therefore, the stabilized expansive soil roadbed for developing a kind of good effect, low cost and environmental protection is very necessary.
The content of the invention
The effect of stabilized expansive soil roadbed method is poor in order to overcome prior art, the defect of high cost and pollution environment,
The invention provides a kind of stabilized expansive soil roadbed filling and its preparation method and application, the improvement expansion provided using the present invention
Dirt road based filler, improved effect is good, and dilatancy improves substantially and stable, low cost and environmental protection.
Specifically, the invention provides a kind of stabilized expansive soil roadbed filling, the stabilized expansive soil roadbed filling contains swollen
Swollen soil, aluminium polychloride and white lime.
Present invention also offers a kind of method of stabilized expansive soil roadbed filling, the method includes：By swelled ground and ripe stone
Ash carries out first and is mixed to form the first mixture, aluminium polychloride and water is carried out into second and is mixed to form the second mixture, then
First mixture and the second mixture are carried out into the 3rd to mix.
Present invention also offers the stabilized expansive soil roadbed filling prepared by said method.
The stabilized expansive soil roadbed filling provided using the present invention, first can fully rationally using the day of expansion soil site
So the soil body is formed and meets the high quality filler for filling requirement, realizes maximum resource utilization；Secondly, stabilized expansive soil roadbed filling
Compressibility is low, water stability and freeze thawing resistance characteristic are good, is capable of the dilatancy of quick improvement subgrade in swelling soil zone filler, and improved effect shows
Write and stable, dry to wet stability and long-time stability are good；In addition, the stabilized expansive soil roadbed filling is nontoxic, will not be right
The soil body causes possible permanent damage；Construction costs can be reduced, it is to avoid the claim for eot that long-distance sand transport brings.
The present invention has above-mentioned advantage, and reason potentially includes following several respects：(1) aluminium polychloride ionizes out a large amount of ions
The ion concentration increase nearby of swelled ground soil particle is made, the adsorption and diffusion layer of soil particle is compressed, while substantial amounts of Al3+Neutralization soil
The negative electrical charge of particle surface, reduces the electrically charged amount of soil particle institute, and Zeta potential is reduced, and the hydrophily of soil particle weakens significantly；
The structure of aluminium polychloride is made up of the changeable polycarboxy complex compound of form, and drawknot, flocculation soil particle are faster more efficient, make
Soil particle forms granule, and hole reduces, and fast and effectively improves the swell-shrink characteristics of subgrade in swelling soil zone filler.(2) white lime with
, there is a series of ion-exchange reactions, carbonic acid reaction, hard solidifying reaction, knot each other in the presence of aqueous medium in swelled ground composition
Crystalline substance reaction so that the micropore between subgrade in swelling soil zone filler is further filled, what is be fitted together between soil body particle is even closer, together
When, the calcium in white lime can also increase effective constituents A l in aluminium polychloride13(Al13It is by the octahedral of 12 hexa-coordinates
Aluminium atom is formed around the aluminium atom of a four-coordination by the combination of hydroxyl bridged bond, is AlO4Al12(OH)24(H2O)12 7+
Abbreviation.) content so that aluminium polychloride becomes apparent to the expansile improved effect of subgrade in swelling soil zone filler, and then makes
The physico mechanical characteristic and durability of improved packing, water stability is further strengthened.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Specific embodiment
The specific embodiment of the present invention is described in detail below.It should be appreciated that described herein concrete
Embodiment is merely to illustrate and explains the present invention, is not limited to the present invention.
Herein the end points and any value of disclosed scope is not limited to the accurate scope or value, these scopes or
Value should be understood to the value comprising close these scopes or value.For number range, between the endpoint value of each scope, respectively
Between the endpoint value of individual scope and single point value, and individually one or more can be obtained with combination with one another between point value
New number range, these number ranges should be considered concrete open herein.
The invention provides a kind of stabilized expansive soil roadbed filling, the stabilized expansive soil roadbed filling contains swelled ground, poly-
Close aluminium chloride and white lime.
In the present invention, the implication of the swelled ground is well known to those skilled in the art.According to《The special rock of railway engineering
Native reconnaissance regulations》Evaluations of the middle 5.5.2 to expansion soil site, free swelling rate >=40%, smectite content >=7%, cation
The two is arbitrarily met in exchange capacity >=170mmol/Kg three and is judged to swelled ground above.
In the present invention, the implication of the aluminium polychloride is well known to those skilled in the art, and can be obtained by commercially available
, it is also possible to prepared by the conventional method in this area.The aluminium polychloride is between AlCl3With Al (OH)3Between
A kind of water-soluble inorganic high molecular polymer, color is yellow, faint yellow, dark brown or Dark grey, and form is resinous solid.
The composition of the aluminium polychloride can be expressed from the next：[Al2(OH)nCl6-n]m, wherein, m is the integer of 1-15, and n is 1-5's
Integer.M represents extent of polymerization, and n represents the neutral degree of aluminium polychloride.Preferably, m is the integer of 6-9, and n is whole for 2-4's
Number.In the aluminium polychloride, on the basis of the gross weight of the aluminium polychloride, with Al2O3The content of meter is preferably not less than
28 weight %, more preferably 30-35 weight %.
In the present invention, the implication of the white lime is well known to those skilled in the art.The white lime can pass through
It is commercially available, it is also possible to be prepared by the conventional method of this area.According to《Highway road surface construction detailed rules and regulations》(JTG/T
F20-2015 the regulation in), it is the leading indicator for judging lime grade that the efficient oxidation calcium adds content of magnesia.Having in the present invention
Effect calcium oxide add the content of magnesia preferably >=55 weight %, more preferably 60-65 weight %.In addition, the white lime from
Right state moisture content≤4 weight %.
In the present invention, on the basis of the gross weight of the white lime, granularity is less than containing for the white lime of 0.17mm more than 0
Amount can be 99-100 weight %, and the content of the white lime of 0.17-0.2mm can be 0-1 weight %.Preferably, with described ripe
On the basis of the gross weight of lime, the content of white lime of the granularity more than 0 less than 0.17mm is 100 weight %.
In the present invention, each component content in the stabilized expansive soil roadbed filling can be in interior variation in a big way.
For example, in the stabilized expansive soil roadbed filling, in terms of dry weight, relative to the swelled ground of 100 weight portions, the polyaluminium
The content of aluminium can be 0.5-1.5 weight portions, and the content of the white lime can be 2-7 weight portions.Although by swelled ground, polymerization
The content of aluminium chloride and white lime is controlled within the above range, but in order to obtain more preferable improved effect, it is preferable that
In the stabilized expansive soil roadbed filling, relative to the swelled ground of 100 weight portions, the content of the aluminium polychloride is 0.8-
1.2 weight portions, the content of the white lime is 3-5 weight portions.
It should be noted that in stabilized expansive soil roadbed filling, the content of swelled ground, aluminium polychloride and white lime and
Consumption is in terms of dry weight.
Present invention also offers a kind of preparation method of stabilized expansive soil roadbed filling, the method includes：By swelled ground with
White lime carries out first and is mixed to form the first mixture, aluminium polychloride and water is carried out into second and is mixed to form the second mixture,
Then the first mixture and the second mixture are carried out into the 3rd to mix.
In the present invention, in the present invention, the implication of the swelled ground is well known to those skilled in the art.According to《Iron
Road engineering Special Rock reconnaissance regulations》Evaluations of the middle 5.5.2 to expansion soil site, free swelling rate >=40%, smectite content
>=7%, the two is arbitrarily met in cation exchange capacity (CEC) >=170mmol/Kg three and is judged to swelled ground above.
In the present invention, the implication of the aluminium polychloride is well known to those skilled in the art, and can be obtained by commercially available
, it is also possible to prepared by the conventional method in this area.The aluminium polychloride is between AlCl3With Al (OH)3Between
A kind of water-soluble inorganic high molecular polymer, color is yellow, faint yellow, dark brown or Dark grey, and form is resinous solid.
The composition of the aluminium polychloride can be expressed from the next：[Al2(OH)nCl6-n]m, wherein, m is the integer of 1-15, and n is 1-5's
Integer.M represents extent of polymerization, and n represents the neutral degree of aluminium polychloride.Preferably, m is the integer of 6-9, and n is whole for 2-4's
Number.In the aluminium polychloride, on the basis of the gross weight of the aluminium polychloride, with Al2O3The content of meter is preferably not less than
28 weight %, more preferably 30-35 weight %.
In the present invention, the implication of the white lime is well known to those skilled in the art.The white lime can pass through
It is commercially available, it is also possible to be prepared by the conventional method of this area.According to《Highway road surface construction detailed rules and regulations》(JTG/T
F20-2015 the regulation in), it is the leading indicator for judging lime grade that the efficient oxidation calcium adds content of magnesia.Having in the present invention
Effect calcium oxide add the content of magnesia preferably >=55 weight %, more preferably 60-65 weight %.In addition, the white lime from
Right state moisture content≤4 weight %.
In the present invention, on the basis of the gross weight of the white lime, granularity is less than containing for the white lime of 0.17mm more than 0
Amount can be 99-100 weight %, and the content of the white lime of 0.17-0.2mm can be 0-1 weight %.Preferably, with described ripe
On the basis of the gross weight of lime, the content of white lime of the granularity more than 0 less than 0.17mm is 100 weight %.
In the present invention, each component consumption in the stabilized expansive soil roadbed filling preparation process can be in a big way
Interior variation.For example, it is described relative to the swelled ground of 100 weight portions in terms of dry weight in the stabilized expansive soil roadbed filling
The consumption of aluminium polychloride can be 0.5-1.5 weight portions, and the consumption of the white lime can be 2-7 weight portions.Although will be swollen
The consumption of swollen soil, aluminium polychloride and white lime is controlled within the above range, but in order to obtain more preferable improved effect,
Preferably, in the stabilized expansive soil roadbed filling, relative to the swelled ground of 100 weight portions, the use of the aluminium polychloride
Measure as 0.8-1.2 weight portions, the consumption of the white lime is 3-5 weight portions.
In the present invention, there is no particular limitation for the condition of first mixing, as long as can be by swelled ground and white lime
It is well mixed.For example, the condition of first mixing includes：Temperature can be 5-40 DEG C, and the time can be little for 0.3-0.7
When.First mixing can be carried out under conditions of stirring.
In the present invention, there is no particular limitation for the condition of second mixing, as long as can be by aluminium polychloride and water
It is well mixed.For example, the condition of second mixing includes：Temperature can be 5-40 DEG C, and the time can be 0.05-0.25
Hour.Second mixing can be carried out under conditions of stirring.According to one kind preferred embodiment, the second mixing bag
Include：Aluminium polychloride is gradually added in water to being completely dissolved.
In the present invention, the consumption of the aluminium polychloride and water that carry out the second mixing can be in interior variation in a big way.Example
Such as, the weight ratio of the consumption of the aluminium polychloride and water can be 0.2-0.45：1, preferably 0.3-0.35：1.
In the present invention, there is no particular limitation for the condition of the 3rd mixing, as long as can be by the first mixture and the
Two mixtures are well mixed.For example, the condition of the 3rd mixing includes：Temperature can be 5-40 DEG C, and the time can be
0.25-0.45 hours.3rd mixing is carried out preferably under conditions of stirring.According to one kind preferred embodiment, it is described
3rd mixing includes：In the state of stirring, the second mixture is sprayed onto into the first mixture surface, and is continued to stir to equal
It is even.The sprinkling can be realized by various usual manners, for example, can be sprayed using spraying machine, and the speed of sprinkling can be with
For 150-250g/min, preferably 180-220g/min.
In the present invention, all of stirring can be carried out in mixing machine, and there is no particular limitation for the speed of stirring, example
Such as can be 20-35rpm.
Present invention also offers the stabilized expansive soil roadbed filling prepared by said method.
Hereinafter will be described the present invention by embodiment.
In the following Examples and Comparative Examples,
The performance of the swelled ground for being used includes：Free swelling rate is 60%, smectite content be 14 weight %, cation
Exchange capacity is 250mmol/Kg, liquid limit wL=47.6%, plastic limit wP=32.5%, the natural water content of swelled ground is 17.4 weights
Amount %, expansive force is 38.4kPa, unconfined compressive strength 0.28MPa, cohesive strength 25.31kPa, 24.3 ° of internal friction angle.
The white lime commercial goods for being used, it is 60 weight % that the efficient oxidation calcium adds content of magnesia, and nature is aqueous
Rate is 2 weight %.
The preparation process of the aluminium polychloride for being used includes：Crystal aluminum chloride is carried out into boiling pyrolysis at 170 DEG C, is put
The hydrogen chloride water absorption for going out is made 20% hydrochloric acid and adds recovery.Then adds water the curing polymerization that carry out more than 60 DEG C, then cured,
It is dried, crushes, solid polyaluminium chloride finished product is obtained.The composition of the aluminium polychloride for preparing can be represented with following formula：
[Al2(OH)2Cl4]7, with Al2O3The content of meter is 30 weight %.
Embodiment 1
The present embodiment is used to illustrate stabilized expansive soil roadbed filling of present invention offer and preparation method thereof
(dry weight is 3g, and granularity is less than more than 0 to weigh the swelled ground (dry weight is 100g) and the white lime of 3.06g of 117.4g
The content of the white lime of 0.17mm is 99 weight %, and the content of the white lime of 0.17-0.2mm is 1 weight %), using forced action type
Mixing machine is well mixed to form the first mixture at 25 DEG C with the speed stirring 30min of 35rpm.Weigh the polyaluminium of 1.2g
Aluminium (dry weight is 1.2g), is gradually added the water of 3.6g in the state of stirring (25 DEG C, 40rpm), and stirring 6min is well mixed shape
Into the second mixture.
At 25 DEG C, be sprayed onto the second mixture according to the speed of 200g/min using spraying machine under stirring
20min is stirred in one mixture surface, sprayed rear continuation, obtains stabilized expansive soil roadbed filling A1.
Embodiment 2
The present embodiment is used to illustrate stabilized expansive soil roadbed filling of present invention offer and preparation method thereof
(dry weight is 5g, and granularity is less than more than 0 to weigh the swelled ground (dry weight is 100g) and the white lime of 5.1g of 117.4g
The content of the white lime of 0.17mm is 99.5 weight %, and the content of the white lime of 0.17-0.2mm is 0.5 weight %), using strong
Standard mixing machine is well mixed to form the first mixture at 35 DEG C with the speed stirring 30min of 35rpm.Weigh the polymerization chlorine of 1g
Change aluminium (dry weight is 1g), the water of 3.3g is gradually added in the state of stirring (35 DEG C, 40rpm), stirring 15min is well mixed shape
Into the second mixture.
At 35 DEG C, be sprayed onto the second mixture according to the speed of 200g/min using spraying machine under stirring
20min is stirred in one mixture surface, sprayed rear continuation, obtains stabilized expansive soil roadbed filling A2.
Embodiment 3
The present embodiment is used to illustrate stabilized expansive soil roadbed filling of present invention offer and preparation method thereof
Mode according to embodiment 1 is carried out, and except for the difference that, the consumption of white lime is 4.08g, and the consumption of aluminium chloride is
0.8g, the consumption of the water mixed with aluminium polychloride is 2.9g.Obtain stabilized expansive soil roadbed filling A3.
Embodiment 4
The present embodiment is used to illustrate stabilized expansive soil roadbed filling of present invention offer and preparation method thereof
Method according to embodiment 1 is carried out, except for the difference that, using commercially available aluminium polychloride alternative embodiment 1 in it is poly-
Aluminium chloride is closed, in commercially available aluminium polychloride, with Al2O3The content of meter is 33 weight %.Obtain stabilized expansive soil roadbed filling
A4。
Embodiment 5
The present embodiment is used to illustrate stabilized expansive soil roadbed filling of present invention offer and preparation method thereof
Method according to embodiment 1 is carried out, and except for the difference that, the weight of the swelled ground for weighing is that (dry weight is 117.4g
100g), the weight of white lime is 7.14g (dry weight is 7g), and the weight of aluminium polychloride is 1.5g (dry weight is 1.5g).Changed
Good subgrade in swelling soil zone filler A5.
Embodiment 6
The present embodiment is used to illustrate stabilized expansive soil roadbed filling of present invention offer and preparation method thereof
Method according to embodiment 1 is carried out, and except for the difference that, the weight of the swelled ground for weighing is that (dry weight is 117.4g
100g), the weight of white lime is 2.04g (dry weight is 2g), and the weight of aluminium polychloride is 0.5g (dry weight is 0.5g).Changed
Good subgrade in swelling soil zone filler A6.
Embodiment 7
The present embodiment is used to illustrate stabilized expansive soil roadbed filling of present invention offer and preparation method thereof
Method according to embodiment 1 is carried out, and except for the difference that, on the basis of the gross weight of the white lime, granularity is little more than 0
It is 95 weight % in the content of the white lime of 0.17mm, the content of the white lime of 0.17-0.2mm is 5 weight %.Obtain improvement swollen
Swollen dirt road based filler A7.
Comparative example 1
This comparative example is used to illustrate stabilized expansive soil roadbed filling of reference and preparation method thereof
Method according to embodiment 1 is carried out, and except for the difference that, does not use white lime, the first mixture whole in embodiment 1
For swelled ground.Obtain stabilized expansive soil roadbed filling DA1.
Comparative example 2
This comparative example is used to illustrate stabilized expansive soil roadbed filling of reference and preparation method thereof
Method according to embodiment 1 is carried out, and except for the difference that, the second mixture is not used, using the first mixture as improvement
Subgrade in swelling soil zone filler DA2.
Comparative example 3
This comparative example is used to illustrate stabilized expansive soil roadbed filling of reference and preparation method thereof
Swelled ground, white lime and the polyaluminium for weighing weight same as Example 1 is well mixed, and mixing speed is
35rpm, temperature is 25 DEG C.Then the speed according to 150g/min under stirring sprays the water of 3.6g, obtains improvement expansion
Dirt road based filler DA3.
Test case
This test case is used to illustrate the test of stabilized expansive soil roadbed filling effect
(1) limit moisture content
According to《Highway earthwork test rule JTG E40-2007》In T 0118-2007 carry out.
(2) free swelling rate
According to《Highway earthwork test rule JTG E40-2007》In T 0124-1993 carry out.
(3) swell increment and expansive force
According to《Highway earthwork test rule JTG E40-2007》In T 0126-1993 and T 0127-1993 carry out.
(4) unconfined compressive strength
According to《Railway earthwork test rule TB10102-2010》Carry out.
(5) triaxial compression test
According to《Railway earthwork test rule TB10102-2010》Carry out.
Test result is listed in Table 1 below.
Table 1
Result from table 1 can be seen that the stabilized expansive soil roadbed that obtained using technical scheme relative to
Natural swelled ground, free swelling rate and expansive force have and decline to a great extent, and unconfined compressive strength has and greatly improves, in addition,
Cohesive strength is remarkably reinforced.That is, the bad performance of natural swelled ground be improved significantly, the roadbed filling for obtaining be high-quality
Filler, therefore, improve roadbed compressibility is low, dry to wet stability and long-time stability are good.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned embodiment
Detail, the present invention range of the technology design in, various simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy is no longer separately illustrated.
Additionally, can also be combined between a variety of embodiments of the present invention, as long as it is without prejudice to this
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of stabilized expansive soil roadbed filling, it is characterised in that the stabilized expansive soil roadbed filling contains swelled ground, polymerization chlorine
Change aluminium and white lime.
2. stabilized expansive soil roadbed filling according to claim 1, wherein, in the stabilized expansive soil roadbed filling,
In terms of dry weight, relative to the swelled ground of 100 weight portions, the content of the aluminium polychloride is 0.5-1.5 weight portions, the ripe stone
The content of ash is 2-7 weight portions；
Preferably, in the stabilized expansive soil roadbed filling, relative to the swelled ground of 100 weight portions, the aluminium polychloride
Content be 0.8-1.2 weight portions, the content of the white lime is 3-5 weight portions.
3. stabilized expansive soil roadbed filling according to claim 2, wherein, the composition of the aluminium polychloride is by following formula table
Show：[Al2(OH)nCl6-n]m, wherein, m is the integer of 1-15, and n is the integer of 1-5；
Preferably, in the aluminium polychloride, on the basis of the gross weight of the aluminium polychloride, with Al2O3The content of meter is not
Less than 28 weight %.
4. the stabilized expansive soil roadbed filling according to any one in claim 1-3, wherein, with the total of the white lime
On the basis of weight, granularity more than 0 less than 0.17mm white lime content be 99-100 weight %, the white lime of 0.17-0.2mm
Content be 0-1 weight %.
5. a kind of preparation method of stabilized expansive soil roadbed filling, it is characterised in that the method includes：By swelled ground and white lime
Carry out first and be mixed to form the first mixture, aluminium polychloride and water are carried out into second and is mixed to form the second mixture, then will
First mixture carries out the 3rd and mixes with the second mixture.
6. preparation method according to claim 5, wherein, in the stabilized expansive soil roadbed filling, in terms of dry weight, phase
For the swelled ground of 100 weight portions, the consumption of the aluminium polychloride is 0.5-1.5 weight portions, and the consumption of the white lime is
2-7 weight portions；
Preferably, relative to the swelled ground of 100 weight portions, the consumption of the aluminium polychloride is 0.8-1.2 weight portions, described ripe
The consumption of lime is 3-5 weight portions；
Preferably, the weight ratio for forming the consumption of the aluminium polychloride and water of the second mixture is 0.2-0.45：1, more preferably
0.3-0.35:1。
7. preparation method according to claim 5, wherein, the condition of first mixing includes：Temperature is 5-40 DEG C, when
Between be 0.3-0.7 hours；
Preferably, the condition of second mixing includes：Temperature is 5-40 DEG C, and the time is 0.05-0.25 hours；
Preferably, the condition of the 3rd mixing includes：Temperature is 5-40 DEG C, and the time is 0.25-0.45 hours.
8. preparation method according to claim 5, wherein, the composition of the aluminium polychloride is expressed from the next：[Al2
(OH)nCl6-n]m, wherein, m is the integer of 1-15, and n is the integer of 1-5；
Preferably, in the aluminium polychloride, on the basis of the gross weight of the aluminium polychloride, with Al2O3The content of meter is not
Less than 28 weight %.
9. preparation method according to claim 5, wherein, on the basis of the gross weight of the white lime, granularity is little more than 0
It is 99-100 weight % in the content of the white lime of 0.17mm, the content of the white lime of 0.17-0.2mm is 0-1 weight %.
10. the stabilized expansive soil roadbed filling that the preparation method by described in any one in claim 5-9 is prepared.
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Cited By (1)
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| CN113005839A (en) * | 2021-03-15 | 2021-06-22 | 云南省设计院集团工程投资有限公司 | Treatment process of bad soil roadbed |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1683719A (en) * | 2004-09-07 | 2005-10-19 | 陈永烽 | Expansion soil ecological modifying agent and construction method |
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| CN104498048A (en) * | 2014-12-01 | 2015-04-08 | 广西大学 | Expansive soil modifier and application method thereof |
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| CN1683719A (en) * | 2004-09-07 | 2005-10-19 | 陈永烽 | Expansion soil ecological modifying agent and construction method |
| CN102182175A (en) * | 2011-04-02 | 2011-09-14 | 中国科学院武汉岩土力学研究所 | Method for inhibiting swelling-shrinking property of swelling soil |
| CN102515187A (en) * | 2011-10-25 | 2012-06-27 | 河海大学 | Spraying method of secondary solution for improving expansive soil |
| CN102774867A (en) * | 2012-08-02 | 2012-11-14 | 中国科学院武汉岩土力学研究所 | Synthesis method and application of hydroxy aluminum expansive soil improver |
| KR20140044977A (en) * | 2012-09-19 | 2014-04-16 | 용진토건 주식회사 | Blast furnace slag-based solidifying composition for weak ground and manufacturing method thereof |
| WO2015044792A2 (en) * | 2013-09-30 | 2015-04-02 | R.F.G. Trading Ltd. | Pavement systems with geocell and geogrid |
| CN104498048A (en) * | 2014-12-01 | 2015-04-08 | 广西大学 | Expansive soil modifier and application method thereof |
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| CN113005839A (en) * | 2021-03-15 | 2021-06-22 | 云南省设计院集团工程投资有限公司 | Treatment process of bad soil roadbed |
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| CN106638196B (en) | 2019-05-31 |
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