CN105060828A - Dechlorinated alkali residue solidified soil for road engineering - Google Patents
Dechlorinated alkali residue solidified soil for road engineering Download PDFInfo
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- CN105060828A CN105060828A CN201510417451.XA CN201510417451A CN105060828A CN 105060828 A CN105060828 A CN 105060828A CN 201510417451 A CN201510417451 A CN 201510417451A CN 105060828 A CN105060828 A CN 105060828A
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- alkaline residue
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Abstract
The invention discloses dechlorinated alkaline residue solidified soil for road engineering. The dechlorinated alkaline residue solidified soil comprises components in percentage by weight as follows: 8%-20% of a curing agent, 45%-55% of dry soil and 35%-40% of water, wherein the curing agent comprises components as follows: flue gas desulfurization gypsum, dechlorinated alkaline residues, coal powder ash, slag and an activator; the dry soil is obtained by grinding dried silt clay. According to the dechlorinated alkaline residue solidified soil for road engineering, the alkaline residue pretreatment technology is effectively developed, the silt clay with poor engineering properties is improved into engineering construction soil, and sustainable resource utilization is realized.
Description
Technical field
The present invention relates to a kind of road engineering dechlorination alkaline residue solidified earth.
Background technology
At present, there is a large amount of silt clay in stratum in China coast city, these silt clay exist the problems such as water content is high, clay content is high, drainage is poor, intensity is low, are difficult to meet engineering construction demand, await carrying out consolidation process.Tradition reinforcement means is for the higher silt clay of water content, and the curing dose of adding is larger, and cost is also very high, and does not often reach desirable solidification effect.
In recent years, due to the bulk deposition of industrial residue, caused the pollution of environment, alkaline residue solidifying agent, due to recycling industrial residue, is used widely.Patent application document open " utilizing alkaline residue to prepare the formula (201410331432.0) of building materials and products thereof " and " a kind of sludge solidification material (201310247152.7) fully utilizing alkaline residue " all relates to the recycling of alkaline residue, but all dechlorination pre-treatment is not carried out to industrial caustic, the high-content muriate (CaCl existed in alkaline residue
2, NaCl) all can cause impact to a certain degree to the environment in coastal road engineering later stage and weather resistance.Therefore, effective exploitation alkaline residue preconditioning technique, realizes continuable recycling, has certain Social benefit and economic benefit.
Summary of the invention
Technical problem to be solved by this invention is, overcome the shortcoming of above prior art: provide a kind of effective exploitation alkaline residue preconditioning technique, silt clay poor for engineering properties is modified to engineering construction soil, realizes the road engineering dechlorination alkaline residue solidified earth of sustainable recycling.
Technical solution of the present invention is as follows: a kind of road engineering dechlorination alkaline residue solidified earth, and it is made up of each component of following weight percent: solidifying agent 8 ~ 20%, dry ground 45 ~ 55% and water 35 ~ 40%; Described solidifying agent is made up of following component: desulfurated plaster, dechlorination alkaline residue, flyash, slag, exciting agent; Described dry ground is obtained after grinding by dried silt clay.
As preferably, described solidifying agent is made up of each component of following weight percent: desulfurated plaster 10 ~ 15%, dechlorination alkaline residue 30 ~ 40%, flyash 20 ~ 32%, slag 20 ~ 30%, exciting agent 5 ~ 10%.
As preferably, described desulfurated plaster is means of flue gas desulfurization of power plant gypsum, and wherein sulfur trioxide content is 35 ~ 45%.
As preferably, described dechlorination alkaline residue by the specific surface area produced in solvay soda process alkali producing process at 400m
2the method pre-treatment that the alkaline residue of/more than kg dechlorinates through electrolysis obtains; Concrete pretreatment process is: alkaline residue and water mixed by 1:2 weight ratio and size mixing, and under the slurries after sizing mixing are placed in the DC electric field of a 2-5V, makes the Na in solution
+, Ca
2+and Cl
-be separated under the effect of electric field.
As preferably, described flyash is specific surface area is 300 ~ 500m
2the second class powered coal ash of/kg.
As preferably, the specific surface area of described slag is 400 ~ 600m
2/ kg.
As preferably, described exciting agent is one or more in water glass, Calucium Silicate powder, sodium sulfate.
As preferably, described dry ground is the dry ground powder that the particle diameter obtained after grinding by silt clay that is air-dry or that dry is less than 2mm.
The preparation method of described road engineering dechlorination alkaline residue solidified earth is: by solidifying agent, and dry ground and water are according to the mixing of said ratio mechanical stirring, compacting.
The preparation method of described solidifying agent is: desulfurated plaster, dechlorination alkaline residue, flyash, slag, exciting agent are uniformly mixed according to said ratio.
Flyash of the present invention play the effects such as filling, grinding aid, reduction hydration heat; Described slag plays the effect such as gelling, filling; CaO in alkaline residue is easy to be released, and produces a series of physical-chemical reaction with clay particle in silt clay and water, forms hydratable silicate gelation system, is attached on soil particle or hole wall, forms comparatively complete soil skeleton, improves the intensity of solidified earth.
In the present invention, silt clay, solidifying agent are stirred full and uniform can being cured by machine.The unconfined compression strength of solidified soil obtained significantly improves, after measured: solidified earth 7 days unconfined compression strengths reach 0.02-0.28MPa; Within 28 days, unconfined compression strength reaches 0.06-0.44MPa; Within 90 days, unconfined compression strength reaches 0.10-0.63MPa, can be used as common engineering and fills out pad soil, have huge economic benefit and engineering construction meaning.
Beneficial effect of the present invention is:
The present invention can meet engineering construction requirement, and preparation method is simple, is fully mixed by mechanical disintegration, stirring;
The present invention can reduce the waste disposal of the industrial residues such as the alkaline residue produced in industrial production to a large amount of appropriation of land and the pollution to surrounding environment; Carry out electrochemical dechlorination particularly by alkaline residue, eliminate muriate to problems such as the pollution of engineering underground water and the corrosion of reinforced concrete works;
Discarded alkaline residue, slag are converted into the good earth working material of engineering property by the present invention, and the silt clay after solidification can be used for road engineering backfill soil;
The main component alkaline residue of solidifying agent, slag, desulfurated plaster and flyash etc. belong to trade waste, utilize trade waste to administer silt clay, and what obtain engineering construction heavy demand fills out pad soil, and compare complex cement solidified earth, cost is lower;
In sum, the present invention first carries out electrochemical dechlorination to alkaline residue, then the characteristic in conjunction with cheap industrial wastes such as alkaline residue, slag, flyash makes and the interactional solidifying agent of silt clay, silt clay is processed, silt clay poor for engineering properties is modified to engineering construction soil, this technology both can reduce engineering earth cost, also can solve the problem that the industrial waste big area such as alkaline residue are stacked.
Embodiment
With specific embodiment, the present invention is described in further details below, but the present invention is not only confined to following specific embodiment.
Embodiment adopts the specifically representational silt clay being positioned at 13.8-14.8m under earth's surface, and water content is 62.4%.
Embodiment 1
The silt clay that will reinforce is dried, grinding filter out particle diameter to be less than the dry ground of 2mm for subsequent use.By weight percentage: solidifying agent 8%, dry ground 55%, water 37%, above-mentioned proportioning raw material is put into stirrer and stir and obtain mixed soil sample, compacting obtains road engineering dechlorination alkaline residue solidified earth.
Wherein, described solidifying agent weight percent consists of the desulfurated plaster of 12%, dechlorination alkaline residue, the flyash of 30%, slag, 5% exciting agent of 23% of 30%;
Described desulfurated plaster is means of flue gas desulfurization of power plant gypsum, and wherein sulfur trioxide content is 35 ~ 45%;
Described dechlorination alkaline residue by the specific surface area produced in solvay soda process alkali producing process at 400m
2the method pre-treatment that the alkaline residue of/more than kg dechlorinates through electrolysis obtains; Concrete pretreatment process is: alkaline residue and water mixed by 1:2 weight ratio and size mixing, and under the slurries after sizing mixing are placed in the DC electric field of a 5V, makes the Na in solution
+, Ca
2+and Cl
-be separated under the effect of electric field; Cl
2, HCl, villaumite with anode water outlet discharge, by percentage to the quality, the Cl in alkaline residue
-be down to less than 0.7% from 9 ~ 14%, clearance reaches more than 95%; CaCl
2be down to less than 1% from 9 ~ 13%, clearance reaches more than 96, NaCl and is down to less than 1% from 3 ~ 9%, and its clearance reaches more than 90%.
Described flyash is specific surface area is 300 ~ 500m
2the second class powered coal ash of/kg, meets GB1596-1991 operative norm.
The specific surface area of described slag is 400 ~ 600m
2/ kg, meets GB/T203-1994 operative norm.
Described exciting agent is water glass.
Recording this road engineering dechlorination alkaline residue solidified earth 14 days unconfined compression strengths is 0.02MPa, and 28 days unconfined compression strengths are 0.06MPa, and 90 days unconfined compression strengths are 0.10MPa.
This road engineering dechlorination alkaline residue solidified earth 14 days compression factor are 1.90MPa
-1, 28 days compression factor are 1.38MPa
-1, 90 days compression factor are 0.75MPa
-1.
This road engineering dechlorination alkaline residue solidified earth 14 days modulus of compression are 1.42MPa, and 28 days modulus of compression are 1.89MPa, and 90 days modulus of compression are 3.42MPa.
This road engineering dechlorination alkaline residue solidified earth 14 days intensive parameters
c=9.58kPa, 28 days intensive parameters
c=11.78kPa, 90 days intensive parameters
c=12.98kPa.
Embodiment 2
The silt clay that will reinforce is dried, grinding filter out particle diameter to be less than the dry ground of 2mm for subsequent use.By weight percentage: solidifying agent 10%, dry ground 50%, water 40%, above-mentioned proportioning raw material is put into stirrer and stir and obtain mixed soil sample, compacting, obtain road engineering dechlorination alkaline residue solidified earth.
Wherein, described solidifying agent weight percent consists of the desulfurated plaster of 12%, dechlorination alkaline residue, the flyash of 30%, slag, 5% exciting agent of 23% of 30%;
Described desulfurated plaster is means of flue gas desulfurization of power plant gypsum, and wherein sulfur trioxide content is 35 ~ 45%;
Described dechlorination alkaline residue by the specific surface area produced in solvay soda process alkali producing process at 400m
2the method pre-treatment that the alkaline residue of/more than kg dechlorinates through electrolysis obtains; Concrete pretreatment process is: alkaline residue and water mixed by 1:2 weight ratio and size mixing, and under the slurries after sizing mixing are placed in the DC electric field of a 5V, makes the Na in solution
+, Ca
2+and Cl
-be separated under the effect of electric field; Remove the Cl of more than 95% mass percent in alkaline residue
-;
Described flyash is specific surface area is 300 ~ 500m
2the second class powered coal ash of/kg, meets GB1596-1991 operative norm.
The specific surface area of described slag is 400 ~ 600m
2/ kg, meets GB/T203-1994 operative norm.
Described exciting agent is Calucium Silicate powder and the sodium sulfate of the mixing of 1:1 weight ratio.
This road engineering dechlorination alkaline residue solidified earth 14 days unconfined compression strengths are 0.04MPa, and 28 days unconfined compression strengths are 0.10MPa, and 90 days unconfined compression strengths are 0.16Mpa; 14 days compression factor are 1.43MPa
-1, 28 days compression factor are 1.22MPa
-1, 90 days compression factor are 0.63MPa
-1; 14 days modulus of compression are 1.88MPa, and 28 days modulus of compression are 2.12MPa, and 90 days modulus of compression are 4.01Mpa; 14 days intensive parameters
c=9.78kPa, 28 days intensive parameters
c=13.46kPa, 90 days intensive parameters
c=19.29kPa.
Embodiment 3
The silt clay that will reinforce is dried, grinding filter out particle diameter to be less than the dry ground of 2mm for subsequent use.By weight percentage: solidifying agent 12%, dry ground 50.5%, water 37.5%, above-mentioned proportioning raw material is put into stirrer and stir and obtain mixed soil sample, compacting, obtain road engineering dechlorination alkaline residue solidified earth.
Wherein, described solidifying agent weight percent consists of the desulfurated plaster of 15%, dechlorination alkaline residue, the flyash of 27%, slag, 7% exciting agent of 21% of 30%;
Described desulfurated plaster is means of flue gas desulfurization of power plant gypsum, and wherein sulfur trioxide content is 35%;
Described dechlorination alkaline residue by the specific surface area produced in solvay soda process alkali producing process at 400m
2the method pre-treatment that the alkaline residue of/more than kg dechlorinates through electrolysis obtains; Concrete pretreatment process is: alkaline residue and water mixed by 1:2 weight ratio and size mixing, and under the slurries after sizing mixing are placed in the DC electric field of a 3V, makes the Na in solution
+, Ca
2+and Cl
-be separated under the effect of electric field; Remove the Cl of more than 95% mass percent in alkaline residue
-;
Described flyash is specific surface area is 500m
2the second class powered coal ash of/kg, meets GB1596-1991 operative norm.
The specific surface area of described slag is 600m
2/ kg, meets GB/T203-1994 operative norm.
Described exciting agent is sodium sulfate.
This road engineering dechlorination alkaline residue solidified earth 14 days unconfined compression strengths are 0.08MPa, and 28 days unconfined compression strengths are 0.18MPa, and 90 days unconfined compression strengths are 0.27MPa.14 days compression factor are 1.12MPa
-1, 28 days compression factor are 0.94MPa
-1, 90 days compression factor are 0.44MPa
-1.14 days modulus of compression are 2.35MPa, and 28 days modulus of compression are 2.72MPa, and 90 days modulus of compression are 5.70MPa.14 days intensive parameters
c=10.09kPa, 28 days intensive parameters
c=15.98kPa, 90 days intensive parameters
c=41.91kPa.
Embodiment 4
The silt clay that will reinforce is dried, grinding filter out particle diameter to be less than the dry ground of 2mm for subsequent use.By weight percentage: solidifying agent 14%, dry ground 51%, water 35%, above-mentioned proportioning raw material is put into stirrer and stir and obtain mixed soil sample, compacting, obtain road engineering dechlorination alkaline residue solidified earth.
Wherein, described solidifying agent weight percent consists of the desulfurated plaster of 13%, dechlorination alkaline residue, the flyash of 29%, slag, 8% exciting agent of 20% of 30%;
Described desulfurated plaster is means of flue gas desulfurization of power plant gypsum, and wherein sulfur trioxide content is 38%;
Described dechlorination alkaline residue by the specific surface area produced in solvay soda process alkali producing process at 400m
2the method pre-treatment that the alkaline residue of/more than kg dechlorinates through electrolysis obtains; Concrete pretreatment process is with embodiment 2.
Described flyash is specific surface area is 450m
2the second class powered coal ash of/kg, meets GB1596-1991 operative norm.
The specific surface area of described slag is 500m
2/ kg, meets GB/T203-1994 operative norm.
Described exciting agent is water glass, Calucium Silicate powder, the sodium sulfate of the mixing of 1:1:1 weight ratio.
This road engineering dechlorination alkaline residue solidified earth 14 days unconfined compression strengths are 0.14MPa, and 28 days unconfined compression strengths are 0.24MPa, and 90 days unconfined compression strengths are 0.41MPa.14 days compression factor are 0.92MPa
-1, 28 days compression factor are 0.61MPa
-1, 90 days compression factor are 0.29MPa
-1.14 days modulus of compression are 2.83MPa, and 28 days modulus of compression are 4.12MPa, and 90 days modulus of compression are 8.86MPa.14 days intensive parameters
c=28.12kPa, 28 days intensive parameters
c=81.56kPa, 90 days intensive parameters
c=115.84kPa.
Embodiment 5
The silt clay that will reinforce is dried, grinding filter out particle diameter to be less than the dry ground of 2mm for subsequent use.By weight percentage: solidifying agent 20%, dry ground 45%, water 35%, above-mentioned proportioning raw material is put into stirrer and stir and obtain mixed soil sample, after compacting, obtain road engineering dechlorination alkaline residue solidified earth.
Wherein, described solidifying agent weight percent consists of the desulfurated plaster of 12%, dechlorination alkaline residue, the flyash of 30%, slag, 5% exciting agent of 23% of 30%;
Described desulfurated plaster is means of flue gas desulfurization of power plant gypsum, and wherein sulfur trioxide content is 38%;
Described dechlorination alkaline residue by the specific surface area produced in solvay soda process alkali producing process at 400m
2the method pre-treatment that the alkaline residue of/more than kg dechlorinates through electrolysis obtains; Concrete pretreatment process is with embodiment 2.
Described flyash is specific surface area is 450m
2the second class powered coal ash of/kg, meets GB1596-1991 operative norm.
The specific surface area of described slag is 600m
2/ kg, meets GB/T203-1994 operative norm.
Described exciting agent is water glass.
This road engineering dechlorination alkaline residue solidified earth 14 days unconfined compression strengths are 0.28MPa, and 28 days unconfined compression strengths are 0.44MPa, and 90 days unconfined compression strengths are 0.63MPa.14 days compression factor are 0.47MPa
-1, 28 days compression factor are 0.28MPa
-1, 90 days compression factor are 0.19MPa
-1.14 days modulus of compression are 5.5MPa, and 28 days modulus of compression are 8.93MPa, and 90 days modulus of compression are 13.31MPa.14 days intensive parameters
c=42.72kPa, 28 days intensive parameters
c=97.55kPa, 90 days intensive parameters
c=125.35kPa.
Above case study on implementation solidified earth performance meets highway engineering construction requirement.
Below be only that feature of the present invention implements example, scope is not constituted any limitation.The technical scheme that all employings exchange on an equal basis or equivalence is replaced and formed, all drops within rights protection scope of the present invention.
Claims (8)
1. a road engineering dechlorination alkaline residue solidified earth, is characterized in that: it is made up of each component of following weight percent: solidifying agent 8 ~ 20%, dry ground 45 ~ 55% and water 35 ~ 40%; Described solidifying agent is made up of following component: desulfurated plaster, dechlorination alkaline residue, flyash, slag, exciting agent; Described dry ground is obtained after grinding by dried silt clay.
2. road engineering dechlorination alkaline residue solidified earth according to claim 1, is characterized in that: described solidifying agent is made up of each component of following weight percent: desulfurated plaster 10 ~ 15%, dechlorination alkaline residue 30 ~ 40%, flyash 20 ~ 32%, slag 20 ~ 30%, exciting agent 5 ~ 10%.
3. road engineering dechlorination alkaline residue solidified earth according to claim 2, it is characterized in that: described desulfurated plaster is means of flue gas desulfurization of power plant gypsum, wherein sulfur trioxide content is 35 ~ 45%.
4. road engineering dechlorination alkaline residue solidified earth according to claim 2, is characterized in that: described dechlorination alkaline residue by the specific surface area produced in solvay soda process alkali producing process at 400m
2the method pre-treatment that the alkaline residue of/more than kg dechlorinates through electrolysis obtains.
5. road engineering dechlorination alkaline residue solidified earth according to claim 2, is characterized in that: described flyash is specific surface area is 300 ~ 500m
2the second class powered coal ash of/kg.
6. road engineering dechlorination alkaline residue solidified earth according to claim 2, is characterized in that: the specific surface area of described slag is 400 ~ 600m
2/ kg.
7. road engineering dechlorination alkaline residue solidified earth according to claim 2, is characterized in that: described exciting agent is one or more in water glass, Calucium Silicate powder, sodium sulfate.
8. road engineering dechlorination alkaline residue solidified earth according to claim 1, is characterized in that: described dry ground is the dry ground powder that the particle diameter obtained after grinding by silt clay that is air-dry or that dry is less than 2mm.
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| CN105622022A (en) * | 2015-12-31 | 2016-06-01 | 宁波高新区围海工程技术开发有限公司 | Silt curing agent prepared from caustic sludge |
| CN106284294A (en) * | 2016-08-08 | 2017-01-04 | 上海强劲地基工程股份有限公司 | A kind of weak soil strengthens curing |
| CN106939165A (en) * | 2017-02-10 | 2017-07-11 | 上海强劲地基工程股份有限公司 | A kind of soil body curing agent and its preparation method and its gunnite method |
| CN107129226A (en) * | 2017-04-27 | 2017-09-05 | 天津城建大学 | A kind of freeze thawing resistance alkaline residue solidified earth and preparation method thereof |
| CN108178550A (en) * | 2017-12-13 | 2018-06-19 | 颍上永红建材有限公司 | A kind of reinforced curing agent for building of environmental protection |
| CN109482610A (en) * | 2018-10-24 | 2019-03-19 | 湖北云应矿业技术开发有限公司 | A kind of alkaline residue backfill disposing technique |
| CN111778033A (en) * | 2020-06-28 | 2020-10-16 | 鞍钢绿色资源科技有限公司 | Curing agent for curing soil and application method |
| CN114394812A (en) * | 2022-01-20 | 2022-04-26 | 浙江鼎晟新材料科技有限公司 | Inorganic composite curing agent for consolidating soil |
| CN114804794A (en) * | 2022-05-27 | 2022-07-29 | 路德环境科技股份有限公司 | Chloride ion curing agent for ammonia-soda process alkaline residue and preparation method and application thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622022A (en) * | 2015-12-31 | 2016-06-01 | 宁波高新区围海工程技术开发有限公司 | Silt curing agent prepared from caustic sludge |
| CN106284294A (en) * | 2016-08-08 | 2017-01-04 | 上海强劲地基工程股份有限公司 | A kind of weak soil strengthens curing |
| CN106939165A (en) * | 2017-02-10 | 2017-07-11 | 上海强劲地基工程股份有限公司 | A kind of soil body curing agent and its preparation method and its gunnite method |
| CN107129226A (en) * | 2017-04-27 | 2017-09-05 | 天津城建大学 | A kind of freeze thawing resistance alkaline residue solidified earth and preparation method thereof |
| CN108178550A (en) * | 2017-12-13 | 2018-06-19 | 颍上永红建材有限公司 | A kind of reinforced curing agent for building of environmental protection |
| CN109482610A (en) * | 2018-10-24 | 2019-03-19 | 湖北云应矿业技术开发有限公司 | A kind of alkaline residue backfill disposing technique |
| CN111778033A (en) * | 2020-06-28 | 2020-10-16 | 鞍钢绿色资源科技有限公司 | Curing agent for curing soil and application method |
| CN114394812A (en) * | 2022-01-20 | 2022-04-26 | 浙江鼎晟新材料科技有限公司 | Inorganic composite curing agent for consolidating soil |
| CN114804794A (en) * | 2022-05-27 | 2022-07-29 | 路德环境科技股份有限公司 | Chloride ion curing agent for ammonia-soda process alkaline residue and preparation method and application thereof |
| CN114804794B (en) * | 2022-05-27 | 2022-12-13 | 路德环境科技股份有限公司 | Chloride ion curing agent for ammonia-soda process caustic sludge as well as preparation method and application of chloride ion curing agent |
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Application publication date: 20151118 |