CN106638196B - A kind of stabilized expansive soil roadbed filling and preparation method thereof - Google Patents
A kind of stabilized expansive soil roadbed filling and preparation method thereof Download PDFInfo
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- CN106638196B CN106638196B CN201611129124.5A CN201611129124A CN106638196B CN 106638196 B CN106638196 B CN 106638196B CN 201611129124 A CN201611129124 A CN 201611129124A CN 106638196 B CN106638196 B CN 106638196B
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- 239000002689 soil Substances 0.000 title claims abstract description 81
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 62
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 62
- 239000004571 lime Substances 0.000 claims abstract description 62
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 53
- 239000004411 aluminium Substances 0.000 claims abstract description 51
- 239000000203 mixture Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 13
- 239000000460 chlorine Substances 0.000 claims description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 230000001976 improved effect Effects 0.000 abstract description 9
- 238000003756 stirring Methods 0.000 description 18
- 239000000945 filler Substances 0.000 description 16
- 230000008961 swelling Effects 0.000 description 13
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 7
- 239000002893 slag Substances 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000395 magnesium oxide Substances 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000007430 reference method Methods 0.000 description 3
- 229910021647 smectite Inorganic materials 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 238000005341 cation exchange Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910001387 inorganic aluminate Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The present invention relates to roadbed filling field, a kind of stabilized expansive soil roadbed filling and preparation method thereof is disclosed, the stabilized expansive soil roadbed filling contains swelled ground, aluminium polychloride and white lime.Using stabilized expansive soil roadbed filling provided by the invention, improved effect is good, and dilatancy improves obvious and stablizes, at low cost and environmentally friendly.
Description
Technical field
The present invention relates to roadbed filling fields, and in particular, to a kind of stabilized expansive soil roadbed filling, a kind of improvement expansion
The preparation method of dirt road based filler, the stabilized expansive soil roadbed filling being prepared by this method.
Background technique
Important component of the roadbed as entire transportation system, directly receiving superstructure load and vehicle are quiet
The long term of dynamic load, and the quality of roadbed quality directly affects running speed and traffic safety, it is therefore necessary to using excellent
The roadbed filling of matter fills.However, bad subgrade filler swelled ground is widely distributed, swelled ground has apparent swell-shrink characteristic, super solid
Knot property and more fissurities bring sizable harm to subgrade construction construction.Road foundation construction is carried out in expansion soil site
When, the filler in natural place does not meet high-grade highway, railway bed fills basic demand.
At present during expansion soil site highway, construction of railways, generallys use remote transport, the purchase of building stones factory, adds
The methods such as the inorganic binders such as lime, cement improvement ensure the excellent performance of filler.But by transporting high-quality fill out at a distance
Material certainly will cause that subgrade engineering cost is excessively high, the duration is too long, therefore combine construction local condition, be filled out by stabilized expansive soil roadbed
Material is allowed to meet the basic demand runed after roadbed filling and work to become and builds problem urgently to be resolved for subgrade engineering.
Patent application CN105951551A discloses a kind of modification method of subgrade in swelling soil zone, and this method is layered or divides multilayer
Accumulate quick lime and swelled ground, watering digests lime sufficiently while layer.But the gel of lime and swelled ground is anti-
It should carry out relatively slowly, there is a problem of that early strength is not high.Secondly, the technical process is more complicated, and it is time-consuming long, it be easy to cause the duration
Extension.In addition, mixing Yi Yangchen when quick lime, environment can be caused centainly to pollute.
Patent application CN102162241A discloses a kind of method with waste carbide slag stabilized expansive soil roadbed filling, should
Method uses carbide slag as curing agent stabilized expansive soil roadbed；Carbide slag is spiked into swelled ground, control moisture content is 18-
20%, being sufficiently stirred makes it uniformly, the volume of carbide slag are as follows: the quality of dry carbide slag is the 6-10% of swelled ground dry mass.It should
Method there are the problem of include: limited by raw material calcium carbide slag it is larger, need from the grown place of carbide slag transport, higher cost.
Therefore, develop that a kind of effect is good, stabilized expansive soil roadbed at low cost and environmentally friendly is very necessary.
Summary of the invention
In order to overcome the effect of stabilized expansive soil roadbed method in the prior art it is poor, it is at high cost and pollution environment defect,
The present invention provides a kind of stabilized expansive soil roadbed fillings and its preparation method and application, are expanded using improvement provided by the invention
Dirt road based filler, improved effect is good, and dilatancy improves obvious and stablizes, at low cost and environmentally friendly.
Specifically, the present invention provides a kind of stabilized expansive soil roadbed filling, which contains swollen
Swollen soil, aluminium polychloride and white lime.
The present invention also provides a kind of methods of stabilized expansive soil roadbed filling, this method comprises: by swelled ground and ripe stone
Ash carries out first and is mixed to form the first mixture, and aluminium polychloride and water are carried out second and are mixed to form the second mixture, then
First mixture is carried out third with the second mixture to mix.
The present invention also provides stabilized expansive soil roadbed fillings prepared by the above method.
Using stabilized expansive soil roadbed filling provided by the invention, the day of expansion soil site can be fully and rationally used first
The right soil body forms the high quality filler for meeting and 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 is aobvious
It writes and stablizes, dry to wet stability and long-time stability are good；In addition, the stabilized expansive soil roadbed filling is nontoxic, it will not be right
The soil body causes possible permanent damage；It can reduce project cost, avoid long-distance sand transport bring claim for eot.
The present invention has above-mentioned advantage, and reason may include following several respects: (1) aluminium polychloride ionizes out a large amount of ions
Making swelled ground soil particle, nearby ion concentration increases, and the adsorption and diffusion layer of soil particle is compressed, while a large amount of Al3+Neutralize soil
The negative electrical charge of particle surface reduces the electrically charged amount of soil particle institute, and Zeta potential reduces, and the hydrophily of soil particle weakens significantly；
The structure of aluminium polychloride is made of the changeable polycarboxy complex compound of form, and drawknot, flocculation soil particle are faster more efficient, is made
Soil particle forms granule, and hole reduces, and quickly and effectively improves the swell-shrink characteristics of subgrade in swelling soil zone filler.(2) white lime with
A series of ion-exchange reactions, carbonic acid reaction, hard solidifying reaction, knot occur each other under the action of aqueous medium for swelled ground ingredient
Crystalline substance reaction, so that the micropore between subgrade in swelling soil zone filler is further filled, what is be fitted between soil body particle is even closer, together
When, the calcium in white lime also can 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 is more obvious to the expansile improved effect of subgrade in swelling soil zone filler, and then make
The physico mechanical characteristic and durability of improved packing, water stability are further strengthened.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
The present invention provides a kind of stabilized expansive soil roadbed filling, which contains swelled ground, gathers
Close aluminium chloride and white lime.
In the present invention, the meaning of the swelled ground is well known to those skilled in the art.According to " the special rock of railway engineering
Native reconnaissance regulations " in 5.5.2 to expansion soil site evaluation, free swelling rate >=40%, smectite content >=7%, cation
Arbitrarily meet the two or more in exchange capacity >=170mmol/Kg three and is determined as swelled ground.
In the present invention, the meaning of the aluminium polychloride is well known to those skilled in the art, and can be obtained by commercially available
, it can also be prepared by the method for this field routine.The aluminium polychloride is between AlCl3With Al (OH)3Between
A kind of water-soluble inorganic high molecular polymer, color are 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 indicates that extent of polymerization, n indicate the neutral degree of aluminium polychloride.Preferably, m is the integer of 6-9, and n is the whole of 2-4
Number.In the aluminium polychloride, on the basis of the total 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 meaning of the white lime is well known to those skilled in the art.The white lime can pass through
It is commercially available, it can also be prepared by the conventional method of this field.According to " highway road surface construction detailed rules and regulations " (JTG/T
F20-2015 the regulation in), the efficient oxidation calcium add content of magnesia to be the main indicator for judging lime grade.Having in the present invention
Effect calcium oxide add magnesia content 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 total weight of the white lime, granularity is greater than containing for 0 white lime less than 0.17mm
Amount can be that the content of the white lime of 99-100 weight %, 0.17-0.2mm can be 0-1 weight %.Preferably, with described ripe
On the basis of the total weight of lime, the content that granularity is greater than 0 white lime less than 0.17mm is 100 weight %.
In the present invention, each component content in the stabilized expansive soil roadbed filling can change 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 parts by weight, the polyaluminium
The content of aluminium can be 0.5-1.5 parts by weight, and the content of the white lime can be 2-7 parts by weight.Although by swelled ground, polymerization
The content of aluminium chloride and white lime controls within the above range, but better improved effect in order to obtain, it is preferable that
In the stabilized expansive soil roadbed filling, relative to the swelled ground of 100 parts by weight, the content of the aluminium polychloride is 0.8-
1.2 parts by weight, the content of the white lime are 3-5 parts by weight.
It should be noted that in stabilized expansive soil roadbed filling, swelled ground, aluminium polychloride and white lime content and
Dosage is in terms of dry weight.
The present invention also provides a kind of preparation methods of stabilized expansive soil roadbed filling, this method comprises: by swelled ground with
White lime carries out first and is mixed to form the first mixture, and aluminium polychloride and water are carried out second and are mixed to form the second mixture,
Then the first mixture third is carried out with the second mixture to mix.
In the present invention, in the present invention, the meaning of the swelled ground is well known to those skilled in the art.According to " iron
Road engineering Special Rock reconnaissance regulations " in 5.5.2 to expansion soil site evaluation, free swelling rate >=40%, smectite content
>=7%, arbitrarily meet the two or more in cation exchange capacity (CEC) >=170mmol/Kg three and be determined as swelled ground.
In the present invention, the meaning of the aluminium polychloride is well known to those skilled in the art, and can be obtained by commercially available
, it can also be prepared by the method for this field routine.The aluminium polychloride is between AlCl3With Al (OH)3Between
A kind of water-soluble inorganic high molecular polymer, color are 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 indicates that extent of polymerization, n indicate the neutral degree of aluminium polychloride.Preferably, m is the integer of 6-9, and n is the whole of 2-4
Number.In the aluminium polychloride, on the basis of the total 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 meaning of the white lime is well known to those skilled in the art.The white lime can pass through
It is commercially available, it can also be prepared by the conventional method of this field.According to " highway road surface construction detailed rules and regulations " (JTG/T
F20-2015 the regulation in), the efficient oxidation calcium add content of magnesia to be the main indicator for judging lime grade.Having in the present invention
Effect calcium oxide add magnesia content 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 total weight of the white lime, granularity is greater than containing for 0 white lime less than 0.17mm
Amount can be that the content of the white lime of 99-100 weight %, 0.17-0.2mm can be 0-1 weight %.Preferably, with described ripe
On the basis of the total weight of lime, the content that granularity is greater than 0 white lime less than 0.17mm is 100 weight %.
In the present invention, the dosage of each component in the stabilized expansive soil roadbed filling preparation process can be in larger range
Interior variation.For example, in the stabilized expansive soil roadbed filling, it is described relative to the swelled ground of 100 parts by weight in terms of dry weight
The dosage of aluminium polychloride can be 0.5-1.5 parts by weight, and the dosage of the white lime can be 2-7 parts by weight.Although by swollen
The dosage of swollen soil, aluminium polychloride and white lime controls within the above range, but better improved effect in order to obtain,
Preferably, in the stabilized expansive soil roadbed filling, relative to the swelled ground of 100 parts by weight, the use of the aluminium polychloride
Amount is 0.8-1.2 parts by weight, and the dosage of the white lime is 3-5 parts by weight.
In the present invention, there is no particular limitation for the described first mixed condition, as long as can be by swelled ground and white lime
It is uniformly mixed.For example, the described first mixed condition, which includes: temperature, to be 5-40 DEG C, the time can be small for 0.3-0.7
When.First mixing can carry out under stirring conditions.
In the present invention, there is no particular limitation for the described second mixed condition, as long as can be by aluminium polychloride and water
It is uniformly mixed.For example, the described second mixed condition, which includes: temperature, to be 5-40 DEG C, the time can be 0.05-0.25
Hour.Second mixing can carry out under stirring conditions.According to a kind of preferred embodiment, the second mixing packet
It includes: aluminium polychloride is gradually added in water to being completely dissolved.
In the present invention, the dosage for carrying out the second mixed aluminium polychloride and water can change in a big way.Example
Such as, the weight ratio of the dosage 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 third mixing, as long as can be by the first mixture and the
Two mixtures are uniformly mixed.For example, the condition of third mixing, which includes: temperature, to be 5-40 DEG C, the time can be
0.25-0.45 hours.The third mixing preferably carries out under stirring conditions.It is described according to a kind of preferred embodiment
Third mixing includes: while stirring, the second mixture to be sprayed onto the first mixture surface, and continue to stir to equal
It is even.The sprinkling can be realized by various usual manners, and spraying machine can be used for example and sprayed, and the rate of sprinkling can be with
For 150-250g/min, preferably 180-220g/min.
In the present invention, all stirrings can carry out in mixing machine, and there is no particular limitation for the rate of stirring, example
It such as can be 20-35rpm.
The present invention also provides the stabilized expansive soil roadbed fillings prepared by the above method.
The present invention will be described in detail by way of examples below.
In the following Examples and Comparative Examples,
The performance of used swelled ground includes: that free swelling rate is 60%, and smectite content is 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
Measure %, expansive force 38.4kPa, unconfined compressive strength 0.28MPa, cohesive strength 25.31kPa, 24.3 ° of internal friction angle.
Used white lime commercial goods, the efficient oxidation calcium add content of magnesia to be 60 weight %, and nature is aqueous
Rate is 2 weight %.
The preparation process of used aluminium polychloride includes: that crystal aluminum chloride is carried out boiling pyrolysis at 170 DEG C, is put
20% hydrochloric acid add-back receipts are made in hydrogen chloride water absorption out.Then plus water at 60 DEG C or more carries out curing polymerization, then cured,
It is dry, it is crushed, solid polyaluminium chloride finished product is made.The composition for the aluminium polychloride being prepared can be indicated with following formula:
[Al2(OH)2Cl4]7, with Al2O3The content of meter is 30 weight %.
Embodiment 1
The present embodiment is for illustrating stabilized expansive soil roadbed filling provided by the invention and preparation method thereof
(dry weight 3g, granularity are greater than and 0 are less than the swelled ground (dry weight 100g) and the white lime of 3.06g for weighing 117.4g
The content of the white lime of 0.17mm is that the content of the white lime of 99 weight %, 0.17-0.2mm is 1 weight %), use forced action type
Speed stirring 30min of the mixing machine at 25 DEG C with 35rpm, which is uniformly mixed, forms the first mixture.Weigh the polyaluminium of 1.2g
Aluminium (dry weight 1.2g), is gradually added the water of 3.6g in the state of stirring (25 DEG C, 40rpm), and stirring 6min is uniformly mixed shape
At the second mixture.
At 25 DEG C, the second mixture is sprayed onto according to the speed of 200g/min using spraying machine under stirring
One mixture surface continues to stir 20min after sprayed, obtains stabilized expansive soil roadbed filling A1.
Embodiment 2
The present embodiment is for illustrating stabilized expansive soil roadbed filling provided by the invention and preparation method thereof
(dry weight 5g, granularity are greater than and 0 are less than the swelled ground (dry weight 100g) and the white lime of 5.1g for weighing 117.4g
The content of the white lime of 0.17mm is that the content of the white lime of 99.5 weight %, 0.17-0.2mm is 0.5 weight %), using strong
Speed stirring 30min of the standard mixing machine at 35 DEG C with 35rpm, which is uniformly mixed, forms the first mixture.Weigh the polymerization chlorine of 1g
Change aluminium (dry weight 1g), the water of 3.3g is gradually added in the state of stirring (35 DEG C, 40rpm), stirring 15min is uniformly mixed shape
At the second mixture.
At 35 DEG C, the second mixture is sprayed onto according to the speed of 200g/min using spraying machine under stirring
One mixture surface continues to stir 20min after sprayed, obtains stabilized expansive soil roadbed filling A2.
Embodiment 3
The present embodiment is for illustrating stabilized expansive soil roadbed filling provided by the invention and preparation method thereof
It is carried out in the way of embodiment 1, unlike, the dosage of white lime is 4.08g, and the dosage of aluminium chloride is
0.8g, the dosage of the water mixed with aluminium polychloride are 2.9g.Obtain stabilized expansive soil roadbed filling A3.
Embodiment 4
The present embodiment is for illustrating stabilized expansive soil roadbed filling provided by the invention and preparation method thereof
It carries out according to the method for embodiment 1, unlike, using poly- in commercially available aluminium polychloride alternative embodiment 1
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 for illustrating stabilized expansive soil roadbed filling provided by the invention and preparation method thereof
It carries out according to the method for embodiment 1, unlike, the weight of weighed swelled ground is that (dry weight is 117.4g
100g), the weight of white lime is 7.14g (dry weight 7g), and the weight of aluminium polychloride is 1.5g (dry weight 1.5g).Changed
Good subgrade in swelling soil zone filler A5.
Embodiment 6
The present embodiment is for illustrating stabilized expansive soil roadbed filling provided by the invention and preparation method thereof
It carries out according to the method for embodiment 1, unlike, the weight of weighed swelled ground is that (dry weight is 117.4g
100g), the weight of white lime is 2.04g (dry weight 2g), and the weight of aluminium polychloride is 0.5g (dry weight 0.5g).Changed
Good subgrade in swelling soil zone filler A6.
Embodiment 7
The present embodiment is for illustrating stabilized expansive soil roadbed filling provided by the invention and preparation method thereof
It carries out according to the method for embodiment 1, unlike, on the basis of the total weight of the white lime, it is small that granularity is greater than 0
In the content of white lime that the content of the white lime of 0.17mm is 95 weight %, 0.17-0.2mm be 5 weight %.It obtains improveing swollen
Swollen dirt road based filler A7.
Comparative example 1
This comparative example is for illustrating stabilized expansive soil roadbed filling of reference and preparation method thereof
It carries out according to the method for embodiment 1, unlike, white lime is not used, the first mixture in embodiment 1 is whole
For swelled ground.Obtain stabilized expansive soil roadbed filling DA1.
Comparative example 2
This comparative example is for illustrating stabilized expansive soil roadbed filling of reference and preparation method thereof
It carries out according to the method for embodiment 1, unlike, 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 for illustrating stabilized expansive soil roadbed filling of reference and preparation method thereof
The swelled ground, white lime and polyaluminium for weighing weight same as Example 1 are uniformly mixed, and mixing speed is
35rpm, temperature are 25 DEG C.Then improvement expansion is obtained according to the water of the speed sprinkling 3.6g of 150g/min under stirring
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
It is carried out according to the T 0118-2007 in " highway earthwork test rule JTG E40-2007 ".
(2) free swelling rate
It is carried out according to the T 0124-1993 in " highway earthwork test rule JTG E40-2007 ".
(3) swell increment and expansive force
It is carried out according to T 0126-1993 and the T 0127-1993 in " highway earthwork test rule JTG E40-2007 ".
(4) unconfined compressive strength
It is carried out according to " railway earthwork test rule TB10102-2010 ".
(5) triaxial compression test
It is carried out according to " railway earthwork test rule TB10102-2010 ".
Test result is listed in Table 1 below.
Table 1
Can be seen that from the result in table 1 the stabilized expansive soil roadbed that is obtained using technical solution of the present invention relative to
Natural swelled ground, free swelling rate and expansive force, which have, to decline to a great extent, and unconfined compressive strength, which has, to be greatly improved, in addition,
Cohesive strength is remarkably reinforced.That is, the bad performance of natural swelled ground be improved significantly, obtained roadbed filling is high-quality
Filler, therefore, the compressibility for improveing roadbed is low, dry to wet stability and long-time stability are good.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (14)
1. a kind of stabilized expansive soil roadbed filling, which is characterized in that the stabilized expansive soil roadbed filling contains swelled ground, polymerization chlorine
Change aluminium and white lime；The stabilized expansive soil roadbed filling, in terms of dry weight, relative to the swelled ground of 100 parts by weight, the polymerization
The content of aluminium chloride is 0.5-1.5 parts by weight, and the content of the white lime is 2-7 parts by weight；With the total weight of the white lime
On the basis of, the content of white lime of the granularity greater than 0 less than 0.17mm is containing for the white lime of 99-100 weight %, 0.17-0.2mm
Amount is 0-1 weight %.
2. stabilized expansive soil roadbed filling according to claim 1, wherein described relative to the swelled ground of 100 parts by weight
The content of aluminium polychloride is 0.8-1.2 parts by weight, and the content of the white lime is 3-5 parts by weight.
3. stabilized expansive soil roadbed filling according to claim 1, 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.
4. stabilized expansive soil roadbed filling according to claim 3, wherein in the aluminium polychloride, with described poly-
On the basis of the total weight for closing aluminium chloride, with Al2O3The content of meter is not less than 28 weight %.
5. a kind of preparation method of stabilized expansive soil roadbed filling, which is characterized in that this method comprises: by swelled ground and white lime
It carries out first and is mixed to form the first mixture, aluminium polychloride and water are carried out second and are mixed to form the second mixture, then will
First mixture carries out third with the second mixture and mixes；
In the stabilized expansive soil roadbed filling, in terms of dry weight, relative to the swelled ground of 100 parts by weight, the aluminium polychloride
Dosage be 0.5-1.5 parts by weight, the dosage of the white lime is 2-7 parts by weight；On the basis of the total weight of the white lime,
The content of white lime of the granularity greater than 0 less than 0.17mm is that the content of the white lime of 99-100 weight %, 0.17-0.2mm is 0-1
Weight %.
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 parts by weight, the dosage of the aluminium polychloride is 0.8-1.2 parts by weight, and the dosage of the white lime is
3-5 parts by weight.
7. preparation method according to claim 5, wherein the dosage of the aluminium polychloride and water of the second mixture of formation
Weight ratio is 0.2-0.45:1.
8. preparation method according to claim 7, wherein the dosage of the aluminium polychloride and water of the second mixture of formation
Weight ratio is 0.3-0.35:1.
9. preparation method according to claim 5, wherein the described first mixed condition includes: that temperature is 5-40 DEG C, when
Between be 0.3-0.7 hours.
10. preparation method according to claim 5, wherein the described second mixed condition includes: that temperature is 5-40 DEG C,
Time is 0.05-0.25 hours.
11. preparation method according to claim 5, wherein it is 5-40 DEG C that the condition of the third mixing, which includes: temperature,
Time is 0.25-0.45 hours.
12. 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.
13. preparation method according to claim 12, wherein in the aluminium polychloride, with the aluminium polychloride
Total weight on the basis of, with Al2O3The content of meter is not less than 28 weight %.
14. the stabilized expansive soil roadbed filling that the preparation method as described in any one of claim 7-11 is prepared.
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| CN1683719A (en) * | 2004-09-07 | 2005-10-19 | 陈永烽 | Expansion soil ecological modifying agent and construction method |
| 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 |
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| CN102182175B (en) * | 2011-04-02 | 2012-06-06 | 中国科学院武汉岩土力学研究所 | Method for inhibiting swelling-shrinking property of swelling soil |
| CN104498048B (en) * | 2014-12-01 | 2017-09-05 | 广西大学 | Expansive soil modifier and its application method |
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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 |
| 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 |
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