CN104498048A - Expansive soil modifier and application method thereof - Google Patents
Expansive soil modifier and application method thereof Download PDFInfo
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- CN104498048A CN104498048A CN201410720946.5A CN201410720946A CN104498048A CN 104498048 A CN104498048 A CN 104498048A CN 201410720946 A CN201410720946 A CN 201410720946A CN 104498048 A CN104498048 A CN 104498048A
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Abstract
The invention discloses an expansive soil modifier. The expansive soil modifier is prepared from the following components in percentage by weight: 33%-70% of aluminum sulfate, 5%-18% of ferric chloride, 8%-20% of hexadecyl trimethyl ammonium bromide, 0.1%-1% of polyacrylamide, 8%-20% of polyaluminum chloride and 3%-8% of sodium silicate nanahydrate. The expansive soil modifier is capable of well inhibiting the expansive potential of the expansive soil, and therefore, the unconfined compressive strength of the expansive soil can be enhanced to a certain extent and the expansive soil is capable of meeting the engineering construction requirements of Code for Design of Highway Subgrades (JTG E30-2004). The prepared modifier has the advantages of easily available raw materials, low price, non-toxicity and no harm, and no influence on human body health and environment. The modifier is good in permeability and simple to apply; the modifier can be directly sprayed to modify the expansive soil, and furthermore, the expansive soil can be solidified, and the construction cost and the influence of the construction process on people and environment are greatly reduced.
Description
Technical field
The present invention relates to rock technical field of civil engineering, particularly a kind of expansive soil modifier and using method thereof.
Background technology
Swelling soil is widely distributed in China, its mineral composition is main mainly with illite, montmorillonite, press from both sides a small amount of kaolinite, these hydrophilic clay mineral water-swellables, dehydration shrinkage, there is obvious swell-shrink characteristic, many fissurities, overconsolidation, easily cause depression, slip collapse, lobe, the accident such as to cave in.In the engineering constructions such as highway, railway, water conservancy, industry and covil construction, inevitably through swelled ground area, for ensureing constructing and security of engineering construction and use procedure, need to carry out necessary process to swelling soil, such as reduce the swell-shrink characteristic of swelling soil, increase expansive soil foundation and slope stability etc.The method of current process swelling soil mainly contains Physical and the large class of chemical method two, and physical method comprises: surface water protection, slope protection, gear and reinforcement protection, soil replacement method, humid control method, pile foundation method etc., chemical process mainly contains: in swelling soil, mix inorganic salts or organic compound, the interaction between water and soil is improved by the surface reaction of catalytic activation grogs, make the character of soil still can reach set index under the influence of water, improve the engineering properties of swelling soil, as by lime, cement is mixed in the medium treatment process of swelling soil, lime curing mechanism is the mutual cementation of the hydrate of silicate and aluminium and particle, cementing matter dewaters and neogenic crystallization gradually, thus reduction liquid limit, increase the slip resistance of the soil body, but the speed of response of lime and cement and soil is slower, the hydrate intensity generated is lower, weather resistance is poor, and lime intermingled quantity is more than 8%, cement mixing content just can reach certain effect 6%, executive cost is higher, execute man-hour requirement uniform mixing repeatedly, cycle is long, during work consuming, and not easily hold, easily there is hidden danger of quality, also there is contaminate environment in it simultaneously, be unfavorable for the problems such as greening.
The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The invention provides a kind of expansive soil modifier, object be expense when reducing construction, on HUMAN HEALTH and environment without impact, and stabilized expansive soil Be very effective.
Another object of the present invention is to the using method that a kind of expansive soil modifier is provided.
For achieving the above object, the invention provides a kind of expansive soil modifier, percentage comprises following component: aluminum sulfate octadecahydrate 33% ~ 70%, iron(ic) chloride 5% ~ 18%, cetyl trimethylammonium bromide 8% ~ 20%, polyacrylamide 0.1% ~ 1%, polymerize aluminum chloride 8% ~ 20%, sodium silicate nanahydrate 3% ~ 8%.
Preferably, in technique scheme, described expansive soil modifier, it is characterized in that, percentage comprises following component: aluminum sulfate octadecahydrate 50% ~ 60%, iron(ic) chloride 8% ~ 15%, cetyl trimethylammonium bromide 10% ~ 15%, polyacrylamide 0.5% ~ 1%, polymerize aluminum chloride 10% ~ 15%, sodium silicate nanahydrate 5% ~ 8%.
Preferably, in technique scheme, described expansive soil modifier, percentage comprises following component: aluminum sulfate octadecahydrate 55%, iron(ic) chloride 10%, cetyl trimethylammonium bromide 13%, polyacrylamide 0.5%, polymerize aluminum chloride 16%, sodium silicate nanahydrate 5.5%.
A using method for expansive soil modifier, comprises the following steps:
(1) by mass fraction, aluminum sulfate octadecahydrate, iron(ic) chloride, cetyl trimethylammonium bromide and polymerize aluminum chloride and sodium silicate nanahydrate are mixed, add the water dilution of mixture total weight amount 20 ~ 30 times again, after stirring, be sprayed directly on swelling soil;
(2) weigh the polyacrylamide of required mass parts, add the water dilution of polyacrylamide weight 20 ~ 30 times, after stirring, be sprayed directly on swelling soil, the swelling soil after curing.
Compared with prior art, the present invention has following beneficial effect: the expansion potentiality of the good repression of swelling soil of expansive soil modifier energy of the present invention, unconfined compression strength strengthens to some extent, " highway subgrade design specifications " (JTG E30-2004) engineering construction requirement can be met, and the raw material preparing this modifying agent is easy to get, cheap, nontoxic, HUMAN HEALTH and environment are not affected.This modifying agent good penetrability, construction is simple, by directly spraying stabilized expansive soil, and then completes the solidification to swelling soil, and significantly reduction construction cost and construction process are on the impact of people, environment.
Embodiment
Below in conjunction with specific embodiment, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.
Embodiment 1
A kind of expansive soil modifier, percentage comprises following component: aluminum sulfate octadecahydrate 33%, iron(ic) chloride 18%, cetyl trimethylammonium bromide 20%, polyacrylamide 1%, polymerize aluminum chloride 20%, sodium silicate nanahydrate 8%.
A using method for expansive soil modifier, comprises the following steps:
(1) by mass fraction, aluminum sulfate octadecahydrate, iron(ic) chloride, cetyl trimethylammonium bromide and polymerize aluminum chloride and sodium silicate nanahydrate are mixed, add the water dilution of mixture total weight amount 20 ~ 30 times again, after stirring, be sprayed directly on swelling soil;
(2) weigh the polyacrylamide of required mass parts, add the water dilution of polyacrylamide weight 20 ~ 30 times, after stirring, be sprayed directly on swelling soil, the swelling soil after curing.
Embodiment 2
Be from the different of embodiment 1, the expansive soil modifier of use, percentage comprises following component: aluminum sulfate octadecahydrate 70%, iron(ic) chloride 9%, cetyl trimethylammonium bromide 8%, polyacrylamide 0.1%, polymerize aluminum chloride 9%, sodium silicate nanahydrate 3.9%.
Embodiment 3
Be from the different of embodiment 1, the expansive soil modifier of use, percentage comprises following component: aluminum sulfate octadecahydrate 55%, iron(ic) chloride 10%, cetyl trimethylammonium bromide 13%, polyacrylamide 0.5%, polymerize aluminum chloride 16%, sodium silicate nanahydrate 5.5%.
Embodiment 4
Be from the different of embodiment 1, the expansive soil modifier of use, aluminum sulfate octadecahydrate 50%, iron(ic) chloride 10%, cetyl trimethylammonium bromide 15%, polyacrylamide 1%, polymerize aluminum chloride 19%, sodium silicate nanahydrate 5%.
Embodiment 5
Be from the different of embodiment 1, the expansive soil modifier of use, aluminum sulfate octadecahydrate 60%, iron(ic) chloride 11%, cetyl trimethylammonium bromide 12%, polyacrylamide 0.5%, polymerize aluminum chloride 10%, sodium silicate nanahydrate 6.5%.
Detect the indices after expansive soil modifier of the present invention and SPP liquid stabilizer process original soil sample, as shown in table 2.
Wherein, the Con-Aid stablizer that SPP liquid stabilisers provides for Canadian Con-Aid company, its concentrated solution is a kind of translucent, scarlet, tasteless liquid, shown in main physicochemical property table 1:
The physicochemical property that table 1:Con-Aid stablizer is main
Table 2: the main performance index contrast of expansive soil modifier of the present invention and SPP liquid stabilizer:
| Performance index | Original soil sample | SPP liquid stabilizer | Expansive soil modifier of the present invention |
| Degree of free swelling (%) | 46.2 | 28.3 | 16.7 |
| Liquid limit (%) | 48.2 | 46.3 | 40.3 |
| Plastic limit (%) | 15.8 | 26.6 | 25.6 |
| Plasticity index (%) | 32.4 | 19.7 | 14.7 |
| Shrinkage limit (%) | 2.9 | 3.1 | 5.5 |
| 50kPa rate of expansion (%) | 7.95 | 1.13 | 1.45 |
| Bulging force (kPa) | 106.0 | 92.7 | 84.4 |
| Unconfined compression strength (kPa) | 819.01 | 937.01 | 898.90 |
As shown in Table 2, compared to original soil sample, expansion soil sample after SPP liquid stabilizer, expansive soil modifier process of the present invention lowers all to some extent in the performance index such as degree of free swelling, Atterberg Limit, plasticity index, rate of expansion, bulging force, increase to some extent in shrinkage limit, unconfined compression strength etc., illustrate that SPP liquid stabilizer and expansive soil modifier of the present invention have certain improved effect.And, the effect of expansive soil modifier of the present invention is better than SPP liquid stabilizer, after adopting expansive soil modifier of the present invention, the degree of free swelling of swelling soil, liquid limit, plastic limit, plasticity index, shrinkage limit, rate of expansion, the performance index such as bulging force and unconfined compression strength all obtain good improvement, can reach " highway subgrade design specifications " (JTGE30-2004) engineering construction requirement.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (4)
1. an expansive soil modifier, it is characterized in that, percentage comprises following component: aluminum sulfate octadecahydrate 33% ~ 70%, iron(ic) chloride 5% ~ 18%, cetyl trimethylammonium bromide 8% ~ 20%, polyacrylamide 0.1% ~ 1%, polymerize aluminum chloride 8% ~ 20%, sodium silicate nanahydrate 3% ~ 8%.
2. expansive soil modifier according to claim 1, it is characterized in that, percentage comprises following component: aluminum sulfate octadecahydrate 50% ~ 60%, iron(ic) chloride 8% ~ 15%, cetyl trimethylammonium bromide 10% ~ 15%, polyacrylamide 0.5% ~ 1%, polymerize aluminum chloride 10% ~ 15%, sodium silicate nanahydrate 5% ~ 8%.
3. expansive soil modifier according to claim 2, is characterized in that, percentage comprises following component: aluminum sulfate octadecahydrate 55%, iron(ic) chloride 10%, cetyl trimethylammonium bromide 13%, polyacrylamide 0.5%, polymerize aluminum chloride 16%, sodium silicate nanahydrate 5.5%.
4. a using method for expansive soil modifier according to claim 1, is characterized in that, comprise the following steps:
(1) by mass fraction, aluminum sulfate octadecahydrate, iron(ic) chloride, cetyl trimethylammonium bromide and polymerize aluminum chloride and sodium silicate nanahydrate are mixed, add the water dilution of mixture total weight amount 20 ~ 30 times again, after stirring, be sprayed directly on swelling soil;
(2) weigh the polyacrylamide of required mass parts, add the water dilution of polyacrylamide weight 20 ~ 30 times, after stirring, be sprayed directly on swelling soil, the swelling soil after curing.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106190142A (en) * | 2016-07-05 | 2016-12-07 | 张聪聪 | Swelled ground LCM and construction method thereof |
| CN106638196A (en) * | 2016-12-09 | 2017-05-10 | 中国神华能源股份有限公司 | Improved expansive soil roadbed filling and preparation method thereof |
| CN107189784A (en) * | 2017-06-01 | 2017-09-22 | 滨州学院 | A kind of waste old ceramics expansive soil modifier and its application method |
| CN112390265A (en) * | 2019-08-12 | 2021-02-23 | 李进东 | High-molecular expansive soil modifier and preparation method thereof |
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|---|---|---|---|---|
| CN106190142A (en) * | 2016-07-05 | 2016-12-07 | 张聪聪 | Swelled ground LCM and construction method thereof |
| CN106638196A (en) * | 2016-12-09 | 2017-05-10 | 中国神华能源股份有限公司 | Improved expansive soil roadbed filling and preparation method thereof |
| CN107189784A (en) * | 2017-06-01 | 2017-09-22 | 滨州学院 | A kind of waste old ceramics expansive soil modifier and its application method |
| CN107189784B (en) * | 2017-06-01 | 2019-10-15 | 山东建筑大学 | A kind of waste old ceramics expansive soil modifier and its application method |
| CN112390265A (en) * | 2019-08-12 | 2021-02-23 | 李进东 | High-molecular expansive soil modifier and preparation method thereof |
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