CN103539389B - Seawater mixes the preparation method of pulp-water earth - Google Patents
Seawater mixes the preparation method of pulp-water earth Download PDFInfo
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- CN103539389B CN103539389B CN201210244360.7A CN201210244360A CN103539389B CN 103539389 B CN103539389 B CN 103539389B CN 201210244360 A CN201210244360 A CN 201210244360A CN 103539389 B CN103539389 B CN 103539389B
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Abstract
Seawater provided by the invention mixes the preparation method of pulp-water earth, first seawater and cement to be joined in mixed stock tank mixed slurry, and reinject stratum and mud stir; The functional quality of cement is 10 ~ 20% of mud quality, and the mass ratio of seawater and cement is 1 ~ 1.2 ︰ 2; Add fineness when mixed slurry be the ultra-fine silicon ash of 0.1 μm ~ 0.2 μm is Additive, and the mass ratio of Additive and cement is 1 ︰ 4 ~ 5; Sodium bicarbonate and sodium hydrogen phosphate are the mixture that 1 ︰ 1 ~ 2 mixes in mass ratio is exciting agent and inhibiter, and the amount being 0.5 ~ 1% by quality g in the seawater and volume ml ratio is first dissolved in seawater and enters mixed slurry again.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 of acquisition is not only uninfluenced also can improve about 50%, more can exempt the erosion action of seawater to facility.
Description
Technical field
That the present invention relates to is the preparation method that a kind of seawater mixes pulp-water earth.
Background technology
Beach application and development is as the important step implementing ocean exploitation strategy, just extensively carry out in coastland, but because coastland is extensively dispersed with muddy soft soil, soil property is weak, intensity is extremely low, cement mixing method often will be adopted to strengthen as ground and the means of pit maintenance soil in basement process and base pit engineering.Cement-earth injects stratum and mud by grout through slush pump to stir, and hard solidifying reaction thing utilize cement grout and the soil body is formed, and this cement-earth just forms cement-earth after solidifying, and can be used for ground reinforcement or pit maintenance soil.And seawater mixes pulp-water earth adopts seawater and cement mixing to form seawater grout exactly, then stir with silt soil the foundation treatment material obtained.Direct extracting seawater when preparing seawater and mixing pulp-water earth, through simple process purification after enter mixed stock tank use.But owing to containing a large amount of corrosion compositions such as chlorion, sulfate ion, magnesium ion in seawater, the solidification of cement-earth can be had influence on and affect the intensity of induration and weather resistance that are formed, cause that the silt soil induration character under seawater eroding is unstable, intensity is low, swell increment weathers greatly, easily, simultaneously due to the admixture of seawater, facility also can be caused to produce corrosive nature, and imappropriate process 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 product of the generation of these erosion action and its chemical reaction has substantial connection.Sulfates and cement effect generate gypsum and hydrated calcium aluminate sulfate (ettringite), and too much ettringite causes cement-earth to expand, thus causes cement-earth Local Cracking or distending, and the formation of ettringite is the important factor affecting cement-earth solidification; 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 materials such as the soft magnesium hydroxide without bond of quality except generating calcium chloride, aggravates the erosion to cement-earth.
At present, there is the solution that some are 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)) disclosing employing interpolation activated silica suppresses the method for ettringite generation 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 the rear cement-earth of reinforcing." experimental study of cement and admixture solidification Tianjin marine soft soil thereof " (" rock-soil mechanics "; Yang Aiwu etc.; 2007; 28(9)) disclose the alkaline environment that additional industrial caustic soda improves marinedeposit; suppress the generation of ettringite; improve the technical measures of content of hydrated calcium silicate, achieve good consolidation effect, but to cause the soil body be strong basicity.Also have the technology of the fastening strength improving marine soft soil using lime as admixture open, but the method can aggravate sulphate attack, application is restricted.
All only notice in above-mentioned research that ion component contained in marine deposit weak soil solidifies disadvantageous one side for cement-earth, passive process marine deposit soft clay ground.
Summary of the invention
For above-mentioned defect, technical problem to be solved by this invention initiatively utilizes seawater intermediate ion to solidify favourable one side for cement-earth, Sulfates in seawater, chloride salt and magnesium salts should be overcome in the application for the expansion of cement-earth and erosion action comprehensively, the cement-earth of acquisition is made to keep the quality such as intensity and linear expansivity again, the seawater of acquisition also to be made to mix pulp-water slurry liquid and to possess corrosion inhibition, thus provide a kind of seawater to mix the preparation method of pulp-water earth.
Seawater provided by the invention mixes the preparation method of pulp-water earth, and first seawater and cement are joined mixed in mixed stock tank slurry, add admixture during mixed slurry, then injection stratum and mud stir; 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 to be its fineness the be ultra-fine silicon ash of 0.1 μm ~ 0.2 μm, add when mixed slurry, its add-on is the mass ratio of Additive and cement is 1 ︰ 4 ~ 5, exciting agent and inhibiter to be sodium bicarbonate and sodium hydrogen phosphate be in mass ratio mixture that 1 ︰ 1 ~ 2 mixes, is first dissolved in seawater and enters mixed slurry again, and the usage quantity of exciting agent and inhibiter is mass volume ratio is in the seawater 0.5 ~ 1%, wherein quality is in g, and volume is in ml.
The mixed pulp-water earth of fresh water preparation is instead of, the SO in seawater with seawater
4 2-ion and cement react and produce appropriate hydrated calcium aluminate sulfate and have early strength function, and the existence of chlorion can improve the solubleness of hydrated calcium aluminate sulfate, stops its crystal growth, thus weaken expansion, the positively charged ion Na in seawater
+, K
+, Ca
2+, Mg
2+ion can strengthen the ion exchange of cement and silt soil, generates more crystalline compounds, and the intensity being conducive to solidified earth improves and water resistance.
The present invention mixes the ultra-fine silicon ash of admixture in pulp-water earth at seawater, particle due to silicon ash is little and have very high activity, can the volcano ash effect of refinforced cement soil, improve cementation and play filling effect thus the degree of compactness of raising bonding component, and the calcium ion consumed due to ultra-fine silicon ash in system, ion exchange in cement-earth is reduced, but intensity can be improved generally when volume is not high and can the expansion of the hierarchy of control preferably.Ultra-fine silicon ash has extremely strong surfactivity, can effectively suppress cement-earth to expand, and the seawater singly mixing silicon ash mixes pulp-water earth swell increment and fresh water, and to mix pulp-water earth close.
The present invention strengthens ion exchange and secondary reaction at employing interpolation sodium bicarbonate and sodium hydrogen phosphate mixture as exciting agent, under rational concentration level, the chemical reaction of seawater intermediate ion can be excited, enhance chemical bond strength, facilitate the growth of xln, effectively increase degree of crystallinity, thus the intensity of cement-earth is significantly improved, and expansion also can control in the reasonable scope.With do not add compared with exciting agent, within 28 days, unconfined compression strength can improve about 50%, and 28 days tensile strength and folding strength can improve about 30%, thus greatly save cement consumption.The sodium bicarbonate added and phosphoric acid hydrogen receive mixture, effective corrosion inhibition can also be formed together with cement grout, to slow down in seawater the corrosive ion such as chlorion, sulfate ion to the corrosive nature of the facility based on steel, thus meet the requirement of facility rot-resistant, stop the disadvantageous effect that this corrosion produces.
Seawater provided by the invention mixes the preparation method of pulp-water earth, and by adding Additive, exciting agent and inhibiter, make the seawater of acquisition mix pulp-water earth and have that intensity is high, expand low feature, on island, reclaiming coastal land district can fresh-water-saving, convenient construction.Seawater mixed slurry soil cement intensity is high, effectively can improve the construction quality of enclosed structure.Seawater mixes the swell increment of pulp-water earth in controlled range, can not have a negative impact to engineering, and appropriate expansion is the effective means improving construction quality on the contrary.Formula has excitation intensity and slowing down corrosion effect simultaneously, can apply without the need to doing other any process to existing facility.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 of acquisition is not only uninfluenced also can improve about 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, and wherein contain unformed silicon-dioxide by mass percentage more than 95%, specific surface area is 15 ~ 27m
2/ g.
Seawater used first carries out purifying, filtering, and reach the mass volume ratio of inclusion-free and silt content within 1%, wherein quality is in g, and volume is in ml, and said impurity refers to floating matter and organism.
Embodiment
The whole process that seawater mixes the preparation method of pulp-water earth is:
1 extracting seawater → sea water filter → precipitation → water reservoir is for subsequent use; The seawater entering water reservoir elimination impurity make silt content be reduced to 1%
.
2 according to the parameter prediction silt soil total amount designing pile body, and set rig speed and slurries injection rate, rig stirs sinking in advance.
The usage quantity of 3 calculating cement and seawater usage quantity; 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.
The seawater calculated in the 3rd step is pumped into mixed stock tank with submersible pump by 4 from water reservoir, adds exciting agent and inhibiter dissolving; Exciting agent and inhibiter are sodium bicarbonate and sodium hydrogen phosphate is the mixture that 1 ︰ 1 ~ 2 mixes in mass ratio; The usage quantity of exciting agent and inhibiter is 0.5% ~ 1% by exciting agent and inhibiter concentration in the seawater
meter.
5 add Additive superfine silica powder and are added in the cement that 3 steps calculate and stir in mixed stock tank;
Wherein cement adopts ordinary Portland cement or silicate cement, strength grade label 325,425 and 525;
The ratio of cement+Additive counts 4 ~ 5 ︰ 1 in mass ratio; Additive uses that its fineness is 0.1 μm ~ 0.2 μm, specific surface area is 15 ~ 27m
2the ultra-fine silicon ash of Steel industry waste material of/g, wherein contains unformed silicon-dioxide by mass percentage more than 95%.
The slurries mixed of cement+Additive+exciting agent and inhibiter+seawater are injected stratum by the Grouting Pipe of cement mixing pile facility with cement slurrypump by 6, hoisting grouting while stirring, thus form cylindrical seawater and mix pulp-water earth, form cement mixing pile after cured.
Claims (3)
1. seawater mixes a preparation method for pulp-water earth, and first seawater and cement are joined mixed in mixed stock tank slurry, add admixture during mixed slurry, then injection stratum and mud stir; It is characterized in that the functional quality of cement is 10 ~ 20% of mud quality, the mass ratio of seawater and cement is 1 ~ 1.2: 2; Said admixture is Additive, exciting agent and inhibiter, wherein Additive to be its fineness the be ultra-fine silicon ash of 0.1 μm ~ 0.2 μm, add when mixed slurry, its add-on is the mass ratio of Additive and cement is 1: 4 ~ 5, the mixtures of exciting agent and inhibiter to be sodium bicarbonate and sodium hydrogen phosphate be in mass ratio 1: 1 ~ 2 mixing, are first dissolved in seawater and enter mixed slurry again, and the usage quantity of exciting agent and inhibiter is mass volume ratio is in the seawater 0.5 ~ 1%, wherein quality is in g, and volume is in ml.
2. seawater as claimed in claim 1 mixes the preparation method of pulp-water earth, and it is characterized in that described ultra-fine silicon ash is for the ultra-fine silicon ash of Steel industry waste material, wherein contain unformed silicon-dioxide by mass percentage more than 95%, specific surface area is 15 ~ 27m
2/ g.
3. seawater as claimed in claim 1 mixes the preparation method of pulp-water earth, it is characterized in that seawater used first carries out purifying, filtering, reach the mass volume ratio of inclusion-free and silt content within 1%, wherein quality is in g, volume is in ml, and said impurity refers to floating matter and organism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN103539389A CN103539389A (en) | 2014-01-29 |
| CN103539389B true CN103539389B (en) | 2015-10-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108058269B (en) * | 2016-11-07 | 2021-02-26 | 济南轨道交通集团有限公司 | Cement soil preparation system suitable for soil bodies with different fluidity |
Citations (6)
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|---|---|---|---|---|
| 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 |
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| CN103539389A (en) | 2014-01-29 |
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