CN103539389A - Preparation method of seawater mixing cemented soil - Google Patents
Preparation method of seawater mixing cemented soil Download PDFInfo
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- CN103539389A CN103539389A CN201210244360.7A CN201210244360A CN103539389A CN 103539389 A CN103539389 A CN 103539389A CN 201210244360 A CN201210244360 A CN 201210244360A CN 103539389 A CN103539389 A CN 103539389A
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Abstract
The invention provides a preparation method of seawater mixing cemented soil. The preparation method comprises the steps of adding seawater and cement into a mixing tank to be mixed together at first, and then pouring the mixed liquid into a stratum to be mixed with sludge, wherein the using amount of the cement accounts for 10-20% of the amount of the sludge, and the mass ratio of the seawater to the cement is (1-1.2):2; adding superfine silica fume with the fineness of 0.1 micronmeter-0.2micronmeter as a doping material in a mixing process, wherein the mass ratio of the doping material to the cement is 1:(4-5); and with a compound which is formed by mixing sodium bicarbonate and sodium hydrogen phosphate according to the mass ratio of 1:(1-2) as an exciting agent and a corrosion inhibitor, dissolving the compound into the seawater according to that the ratio of mass g to volume ml in the seawater is 0.5-1%, and then feeding the mixture into the mixed sludge. Compared with the prior art, the seawater mixing cemented soil has a comprehensive inhibiting effect on the erosion of sulfates, chlorine salts and magnesium salts in the seawater to the cemented soil, the expansion growth is not more than 10%, the strength of the obtained cemented soil is not only not influenced but also improved by about 50%, and the erosion of the seawater to machines and tools can also be eliminated.
Description
Technical field
That the present invention relates to is the preparation method of the mixed pulp-water earth of a kind of seawater.
Background technology
Beach application and development is as the important step of implementing ocean exploitation strategy, just in coastland, extensively carry out, but due to the coastland muddy soft soil that extensively distributing, soil property is weak, intensity is extremely low, often will adopt cement mixing method as the means of ground reinforcement and pit maintenance soil in ground processing and base pit engineering.Cement-earth is by grout, through slush pump, to inject stratum to stir with mud, and that utilizes cement grout and the soil body hard solidifyingly react formation, after this cement-earth is curing, just forms cement-earth, can be used for ground reinforcement or pit maintenance soil.And the mixed pulp-water earth of seawater adopts seawater and cement mixing to form seawater grout exactly, then stir with silt soil the foundation treatment material obtaining.When preparing the mixed pulp-water earth of seawater, be direct extracting seawater, after simple process purifies, enter that mixed stock tank uses.But owing to containing the corrosion compositions such as a large amount of chlorions, sulfate ion, magnesium ion in seawater, can have influence on intensity and the weather resistance of solidifying and affect formed induration of cement-earth, cause that silt soil induration character under seawater eroding is unstable, intensity is low, swell increment greatly, easily weather, while is due to the admixture of seawater, also can cause facility to produce corrosive nature, imappropriate processing can cause facility loss to strengthen.
There are some researches show, Sulfates, chloride salt and magnesium salts contained in marine deposit weak soil have erosion action for cement-earth, and the generation of these erosion action and the product of its chemical reaction have substantial connection.Sulfates and cement effect generate gypsum and hydrated calcium aluminate sulfate (ettringite), and too much ettringite causes that cement-earth expands, thereby causes cement-earth Local Cracking or distending, and the formation of ettringite is to affect the important factor that cement-earth solidifies; The calcium chloride that calcium hydroxide reaction in chloride salt and cement-earth generates is soluble in water; Calcium hydroxide reaction in magnesium salts and cement-earth also can generate the soft materials such as magnesium hydroxide without bond of quality except generating calcium chloride, the erosion of aggravation to cement-earth.
At present, there are some solutions relevant to the problems referred to above, as " selection of cement additive in treating marine soft soil with DCM " (< < geotechnical engineering journal > >, Pei Xiangjun etc., 2000, 22(3)), " experimental study that control seawater corrodes cement-earth " (< < Changchun Institute of Technology journal (natural science edition) > >, Pei Xiangjun etc., 2000, 1(1)) disclose and adopted the method for adding the generation of activated silica inhibition ettringite to prevent and treat the technical measures that in marine deposit weak soil, high salinity ion pair cement-earth corrodes, but the low strength of cement-earth after reinforcing." cement and admixture thereof solidify the experimental study of Tianjin marine soft soil " (< < rock-soil mechanics > >; Yang Aiwu etc.; 2007; 28(9)) alkaline environment that additional industrial caustic soda improves marinedeposit is disclosed; suppress the generation of ettringite; the technical measures that improve the content of hydrated calcium silicate, have obtained good consolidation effect, but have caused the soil body to be strong basicity.The lime of usining is in addition open as the technology of the fastening strength of admixture raising marine soft soil, but the method can be aggravated sulphate attack, and application is restricted.
In above-mentioned research, all only noticed that ion component contained in marine deposit weak soil solidifies disadvantageous one side, passive processing marine deposit soft clay ground for cement-earth.
Summary of the invention
For above-mentioned defect, technical problem to be solved by this invention is initiatively to utilize seawater intermediate ion to solidify favourable one side for cement-earth, in application, should overcome Sulfates in seawater, chloride salt and magnesium salts for expansion and the erosion action of cement-earth comprehensively, make again the cement-earth obtaining keep the qualities such as intensity and linear expansivity, also to make the mixed slurry of the seawater cement grout obtaining possess corrosion inhibition, thereby the preparation method of the mixed pulp-water earth of a kind of seawater is provided.
The preparation method of the mixed pulp-water earth of seawater provided by the invention, first joins seawater and cement mixed slurry in mixed stock tank, during mixed slurry, adds admixture, then injects stratum and mud stirs; Wherein the functional quality of cement is 10 ~ 20% of mud quality, and the mass ratio of seawater and cement is 1 ~ 1.2 ︰ 2; Said admixture is Additive, exciting agent and inhibiter, wherein Additive is that its fineness is the ultra-fine silicon ash of 0.1 μ m ~ 0.2 μ m, when mixed slurry, add, its add-on is that the mass ratio of Additive and cement is 1 ︰ 4 ~ 5, exciting agent and inhibiter are that sodium bicarbonate and sodium hydrogen phosphate are the mixture that 1 ︰ 1 ~ 2 mixes in mass ratio, first be dissolved in seawater and enter mixed slurry again, the usage quantity of exciting agent and inhibiter is that the quality g in seawater is 0.5 ~ 1% with volume ml ratio.
With seawater, the mixed pulp-water earth of fresh water preparation, the SO in seawater have been replaced
4 2-ion reacts the appropriate hydrated calcium aluminate sulfate of generation and has early strength function with cement, the existence of chlorion can improve the solubleness of hydrated calcium aluminate sulfate, stops its crystal growth, thereby weakens expansion, the positively charged ion Na in seawater
+, K
+, Ca
2+, Mg
2+ion can be strengthened the ion exchange of cement and silt soil, generates more crystalline compounds, and the intensity that is conducive to solidified earth improves and water resistance.
The present invention is the ultra-fine silicon ash of admixture in the mixed pulp-water earth of seawater, because the particle of silicon ash is little and have very high activity, volcanic ash effect that can refinforced cement soil, thereby improve cementation and play the degree of compactness that filling effect improves bonding component, and because ultra-fine silicon ash has consumed the calcium ion in system, ion exchange in cement-earth is reduced, but when volume is not high, can improve generally intensity the expansion of the hierarchy of control preferably.Ultra-fine silicon ash has extremely strong surfactivity, can effectively suppress cement-earth and expand, and the mixed pulp-water earth swell increment of seawater and the mixed pulp-water earth of fresh water of singly mixing silicon ash approach.
The present invention is adopting interpolation sodium bicarbonate and sodium hydrogen phosphate mixture to strengthen ion exchange and secondary reaction as exciting agent, under rational concentration level, can excite the chemical reaction of seawater intermediate ion, strengthened chemical bond strength, promoted the growth of xln, effectively increase degree of crystallinity, thereby the intensity of cement-earth is significantly improved, and expansion also can be controlled in the reasonable scope.Compare with not adding exciting agent, 28 days unconfined compression strengths can improve approximately 50%, 28 day tensile strength and folding strength can improve approximately 30%, thereby greatly save cement consumption.The sodium bicarbonate adding and phosphoric acid hydrogen are received mixture, can also form effective corrosion inhibition together with cement grout, slow down the corrosive ion such as chlorion, sulfate ion in seawater to take the corrosive nature of steel as main facility, thereby meet the requirement of facility rot-resistant, the disadvantageous effect that stops this corrosion to produce.
The preparation method of the mixed pulp-water earth of seawater provided by the invention, by adding Additive, exciting agent and inhibiter, the mixed pulp-water earth of seawater that makes to obtain has that intensity is high, the low feature that expands, on island, coastal enclose and cultivate district can fresh-water-saving, convenient construction.The mixed slurry of seawater soil cement intensity is high, can effectively improve the construction quality of enclosed structure.The swell increment of the mixed pulp-water earth of seawater, in controlled range, can not have a negative impact to engineering, and appropriate expansion is the effective means that improves construction quality on the contrary.Formula has excitation intensity and slowing down corrosion effect simultaneously, without existing facility being done to other any processing, can apply.Compared with prior art, the present invention has comprehensive restraining effect to Sulfates, chloride salt and magnesium salts in seawater for the erosion action of cement-earth, expansion increment is no more than 10%, and make that the soil cement intensity that obtains is not only uninfluenced also can improve approximately 50%, more can exempt the erosion action of seawater to facility.
Described ultra-fine silicon ash is the ultra-fine silicon ash of Steel industry waste material, wherein contains unformed silicon-dioxide by mass percentage more than 95%, and specific surface area is 15 ~ 27m
2/ g.
Seawater used first purifies, filters, and the quality g that reaches inclusion-free and silt content compares in 1% with volume ml, and said impurity refers to floating matter and organism.
Embodiment
The preparation method's of the mixed pulp-water earth of seawater whole process is:
1. extracting seawater → sea water filter → precipitation → water reservoir is standby;
The seawater that enters water reservoir is elimination impurity make silt content be reduced to 1%(
).
2. according to the parameter prediction silt soil total amount of design pile body, set rig speed and slurries injection rate, rig stirs sinking in advance.
3. calculate usage quantity and the seawater usage quantity of cement;
The usage quantity of cement is 10 ~ 20%(mass percent of amount of sludge);
Seawater usage quantity is 0.5 ~ 0.6 times (mass ratio) of cement usage quantity.
4. with submersible pump by 3. step, calculate seawater from water reservoir, pump into mixed stock tank, add exciting agent and inhibiter to dissolve;
Exciting agent and inhibiter are that sodium bicarbonate and sodium hydrogen phosphate are the mixture that 1 ︰ 1 ~ 2 mixes in mass ratio;
By exciting agent and inhibiter, the concentration in seawater is 0.5% ~ 1%(to the usage quantity of exciting agent and inhibiter
) meter.
5. in mixed stock tank, add Additive superfine silica powder and be added in 3. step calculate cement stir;
Wherein cement adopts ordinary Portland cement or silicate cement, strength grade label 325,425 and 525;
The ratio of cement+Additive is counted 4 ~ 5 ︰ 1 in mass ratio;
It is that 0.1 μ m ~ 0.2 μ m, specific surface area are 15 ~ 27m that Additive is used its fineness
2the ultra-fine silicon ash of Steel industry waste material of/g, wherein contains unformed silicon-dioxide by mass percentage more than 95%.
6. with cement slurrypump, the slurries that mix of cement+Additive+exciting agent and inhibiter+seawater are injected to stratum by the Grouting Pipe of cement mixing pile facility, hoisting grouting while stirring, thereby form the mixed pulp-water earth of cylindrical seawater, form after cured cement mixing pile.
Claims (3)
1. a preparation method for the mixed pulp-water earth of seawater, first joins seawater and cement mixed slurry in mixed stock tank, during mixed slurry, adds admixture, then injects stratum and mud stirs; The functional quality that it is characterized in that cement is 10 ~ 20% of mud quality, and the mass ratio of seawater and cement is 1 ~ 1.2 ︰ 2; Said admixture is Additive, exciting agent and inhibiter, wherein Additive is that its fineness is the ultra-fine silicon ash of 0.1 μ m ~ 0.2 μ m, when mixed slurry, add, its add-on is that the mass ratio of Additive and cement is 1 ︰ 4 ~ 5, exciting agent and inhibiter are that sodium bicarbonate and sodium hydrogen phosphate are the mixture that 1 ︰ 1 ~ 2 mixes in mass ratio, first be dissolved in seawater and enter mixed slurry again, the usage quantity of exciting agent and inhibiter is that the quality g in seawater is 0.5 ~ 1% with volume ml ratio.
2. the preparation method of the mixed pulp-water earth of seawater as claimed in claim 1, is characterized in that described ultra-fine silicon ash, for the ultra-fine silicon ash of Steel industry waste material, wherein contains unformed silicon-dioxide by mass percentage more than 95%, and specific surface area is 15 ~ 27m
2/ g.
3. the preparation method of the mixed pulp-water earth of seawater as claimed in claim 1, is characterized in that seawater used first purifies, filters, and the quality g that reaches inclusion-free and silt content compares in 1% with volume ml, and said impurity refers to floating matter and organism.
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|---|---|---|---|
| CN201210244360.7A CN103539389B (en) | 2012-07-16 | 2012-07-16 | Seawater mixes the preparation method of pulp-water earth |
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| CN201210244360.7A CN103539389B (en) | 2012-07-16 | 2012-07-16 | Seawater mixes the preparation method of pulp-water earth |
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| CN103539389A true CN103539389A (en) | 2014-01-29 |
| CN103539389B CN103539389B (en) | 2015-10-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103951320A (en) * | 2014-04-16 | 2014-07-30 | 长安大学 | Mix proportion design method of seawater slurry with stable wall retaining property |
| CN105669109A (en) * | 2014-11-18 | 2016-06-15 | 中国辐射防护研究院 | High-level radioactive waste geological repository special-purposed low-alkali cement |
| CN108058269A (en) * | 2016-11-07 | 2018-05-22 | 济南轨道交通集团有限公司 | Suitable for different fluidities and the soil cement preparation system of the soil body |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066433A (en) * | 1991-05-04 | 1992-11-25 | 中国建筑材料科学研究院 | Sand-cement slurry or concrete erosion resistant material and manufacture method thereof |
| EP1136627B1 (en) * | 1999-07-12 | 2009-09-30 | Okutama Kogyo Co., Ltd. | Lime-improved soil mortar and method for production thereof and fluidization treatment method using the same |
| CN102295442A (en) * | 2011-06-27 | 2011-12-28 | 江苏坤泽科技股份有限公司 | Solidifying material for marine dredging and tidal flat sludge |
| CN102382633A (en) * | 2010-08-31 | 2012-03-21 | 中国海洋石油总公司 | Silicate grout for deep water |
| CN102503248A (en) * | 2011-09-27 | 2012-06-20 | 中国地质大学（武汉） | Mudflat mud curing agent |
| CN102557536A (en) * | 2011-12-08 | 2012-07-11 | 东南大学 | Curing agent for littoral-facy soft soil |
-
2012
- 2012-07-16 CN CN201210244360.7A patent/CN103539389B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066433A (en) * | 1991-05-04 | 1992-11-25 | 中国建筑材料科学研究院 | Sand-cement slurry or concrete erosion resistant material and manufacture method thereof |
| EP1136627B1 (en) * | 1999-07-12 | 2009-09-30 | Okutama Kogyo Co., Ltd. | Lime-improved soil mortar and method for production thereof and fluidization treatment method using the same |
| CN102382633A (en) * | 2010-08-31 | 2012-03-21 | 中国海洋石油总公司 | Silicate grout for deep water |
| CN102295442A (en) * | 2011-06-27 | 2011-12-28 | 江苏坤泽科技股份有限公司 | Solidifying material for marine dredging and tidal flat sludge |
| CN102503248A (en) * | 2011-09-27 | 2012-06-20 | 中国地质大学（武汉） | Mudflat mud curing agent |
| CN102557536A (en) * | 2011-12-08 | 2012-07-11 | 东南大学 | Curing agent for littoral-facy soft soil |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103951320A (en) * | 2014-04-16 | 2014-07-30 | 长安大学 | Mix proportion design method of seawater slurry with stable wall retaining property |
| CN103951320B (en) * | 2014-04-16 | 2015-09-09 | 长安大学 | A kind of mixing proportion design method of sea-water mud of retaining wall stable performance |
| CN105669109A (en) * | 2014-11-18 | 2016-06-15 | 中国辐射防护研究院 | High-level radioactive waste geological repository special-purposed low-alkali cement |
| CN108058269A (en) * | 2016-11-07 | 2018-05-22 | 济南轨道交通集团有限公司 | Suitable for different fluidities and the soil cement preparation system of the soil body |
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| CN103539389B (en) | 2015-10-07 |
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