CN103911160A - High-titanium slag soft soil stabilizer - Google Patents
High-titanium slag soft soil stabilizer Download PDFInfo
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- CN103911160A CN103911160A CN201410162580.4A CN201410162580A CN103911160A CN 103911160 A CN103911160 A CN 103911160A CN 201410162580 A CN201410162580 A CN 201410162580A CN 103911160 A CN103911160 A CN 103911160A
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- titanium slag
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Abstract
The invention discloses a high-titanium slag soft soil stabilizer, which consists of the following components in percentage by weight: 40.0-60.0 percent of high-titanium slag, 25.0-40.0 percent of ordinary Portland cement, 10.0-25.0 percent of quicklime and 0-10.0 percent of active component. The soft soil stabilizer is prepared by making full use of industrial waste residues produced during pig iron smelting. When the soft soil stabilizer is used for stabilizing soft soil foundations, relatively high unconfined compressive strength is achieved, waste is turned into valuable, and great economical significance and environmental protection benefit are realized.
Description
Technical field
the present invention relates to a kind of high-titanium slag soft soil curing agent, be used for the environment-friendly type soft soil consolidation material of reinforcing soft ground more specifically to a kind of extensively place of cement, lime.
Background technology
Mud, mucky soil, soft clay, peat and cumulosol are as common Types of soft soil in ground construction, because natural moisture content is large, intensity is low, void ratio is large, compression factor is high, and there is thixotropy, the engineering properties that creep properties etc. are special, and often in flowing north or soft north state, so engineering geological conditions is poor, often bring very large harm to Base Consolidation Engineering, once deal with improperly, make a big impact to construction and the use of ground, therefore in engineering, select weak soil to apply as natural foundation, must be according to the engineering characteristic of weak soil, use necessary Reinforcement Measures.The domestic method of still continuing to use cement or Lime Stabilization weak soil at present, but cement industry is as highly energy-consuming, high pollutive industries, its use is more and more restricted, practice also proves that cement is also existing some defects aspect consolidation process weak soil in addition, conventionally exist such as compacted soil intensity forms slowly, low and some the soil property type of consolidation process optionally of unconfined compression strength, have a strong impact on the unfavorable factors such as construction speed, particularly to some grays, greyish-green, the dun weak soil that contains a large amount of organic compositions, because this class soil property has larger water capacity, plasticity, swelling property and lower perviousness, and organic existence can with cement minerals generation series of chemical, hinder the crystal growth of hydrolysis product of cement, and then indirectly cause the intensity of soil-cement lower.Lime Stabilization soil is because drying shrinkage is larger, optimum moisture content to compacted soil and maximum dry density are extremely responsive, in reinforced soft soil ground, be also restricted, in addition in the time needing higher bearing capacity of foundation soil, limestone soil does not often have due effect, this is to need admixture compared with the lime of multiple doses because higher bearing capacity of foundation soil often means, but but too much lime exists with free grey form in native space, and then can cause again the strength degradation of limestone soil.Meanwhile, soft soil curing agent method for strengthening, environmental protection efficient owing to having, the outstanding advantages such as energy-conservation obtain the approval of engineering circles day by day.
High-titanium slag, as smelt the by product when pig iron take schreyerite stone as raw material, due to the type of cooling through quenching, therefore in the steady state that is situated between, has certain latent hydraulicity, under specific activating component effect, and the Ca that dissociates and
2+on the one hand can with soil in lower valency ion generation permutoid reaction, can also with active SiO in soil
2, Al
2o
3composition effect generates moisture Calucium Silicate powder and calcium aluminate, if high-titanium slag can be applied in soft soil curing agent, will have a great economic significance and environmental benefit.
Summary of the invention
Object of the present invention is intended to overcome prior art deficiency, and a kind of high-titanium slag soft soil curing agent is provided, and in making full use of waste resource, realizing energy-saving and emission-reduction, improves soft clay ground unconfined compression strength.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A kind of high-titanium slag soft soil curing agent, is characterized in that being made up of high-titanium slag, ordinary Portland cement, unslaked lime, activating component, and the weight percentage of each component is:
High-titanium slag 40.0 ~ 60.0%
Ordinary Portland cement 25.0 ~ 40.0%
Unslaked lime 10.0 ~ 25.0%
Activating component 0 ~ 10.0%.
The further improvement project of the present invention is that described high-titanium slag is that block or granular waste residue grinding to the specific grain surface forming after quenching in schreyerite stone smelting pig iron process amasss the high-titanium slag powder into 350-550 ㎡/㎏.
The further improvement project of the present invention is that described cement is ordinary Portland cement.
The further improvement project of the present invention is that described unslaked lime is (CaO+MgO) content >=70% effectively.
The further improvement project of the present invention is that described activating component is one or the arbitrary composition in sodium carbonate or sodium hydroxide, preferably sodium carbonate.
The application of high-titanium slag soft soil curing agent in soft clay ground, the mixed ratio of described soft soil curing agent is generally 5% ~ 10% of cubic metre of earth quality, is determined by concrete weak soil matter.
Compared with prior art the present invention has following beneficial effect:
Shrend high-titanium slag is the inevitable byproduct in pig iron smelting process as schreyerite stone, along with its people build, the output that increases of pig iron demand is risen year by year in recent years, but method and the ability of high-titanium slag resource utilization recycling are extremely limited, only Pan Gang group in Sichuan just produces more than 500 ten thousand tons, waste residue every year, the waste residue of flood tide is banked up and has seriously been restricted the development of group, arbitrarily topple over and not only take a large amount of arable lands, and can cause huge pollution to environment.Along with the progressively implementation and deepening of Environmental Protection in China policy, the processing of high-titanium slag has become the task of top priority.
The present invention fully uses the CaO, the SiO that in the high-titanium slag vitreous structure through shrend chilling, contain
2isoreactivity oxide compound has the characteristic of certain potential hydraulically active, used to soft soil curing agent, the high-titanium slag micro mist that particularly high-titanium slag forms after physics grinding has further strengthened its hydraulically active, more can be under the chemical reaction effect of cement, lime component stimulating activity, and with weak soil in active CaO, Al
2o
3composition reacts and generates moisture Calucium Silicate powder and calcium aluminate, finally reach soil mass consolidation, mention the object of unconfined compression strength, activating component hydrolysis in solidifying agent presents stronger alkalescence later, also be that its hydrolysate can further strengthen the needed alkaline environment of solidifying agent, and then promote the depolymerization of slag glass body, thereby more bring into play the lateral reactivity of high-titanium slag together with grinding effect.
Soft soil curing agent of the present invention not only can effectively solve soft clay ground to be difficult to reinforce, and the problem that unconfined compression strength is low, can also fully utilize industrial solid castoff high-titanium slag, promotes China's Iron And Steel Industry to continue high-efficient development.
embodiment:
Test material preparation and test: adopt In Chengdu muddy soft soil (liquid limit 64.2%, water ratio 60.3%) be cured as solidifying object, high-titanium slag is through grinding to certain specific surface area, and cement, unslaked lime, activating component weigh according to solidifying agent proportion speed and mixing and stirring can obtain soft soil curing agent of the present invention.After above-mentioned solidifying agent and PO42.5 cement are stirred by certain massfraction (accounting for weak soil massfraction) and weak soil respectively respectively layering to pour into diameter be 50mm, be highly in the cylindrical die of 50mm, vibrate and compaction moulding, be placed on subsequently 20 ℃ of temperature, relative humidity is in 90% curing in airtight condition chamber, the demoulding after one day, maintenance is to the default length of time, according to " earthwork test rule " (SL237-010-1999) test sample unconfined compression strength.
Embodiment 1
Taking grinding to specific surface area is 350m
2the shrend high-titanium slag 53.3kg of/kg, PO42.5 cement 33.3kg, unslaked lime (the efficient oxidation calcium+content of magnesia>=70%) 13.3kg, mixes and stirs all obtaining a kind of soft soil curing agent of the present invention jointly.According to above-mentioned test and test procedure, take respectively and account for the soft soil curing agent of weak soil massfraction 5%, 10% and the weak soil preparation solidified earth test specimen that stirs, measure 7d, 28d unconfined compression strength in the length of time.Result is that the solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 5% are respectively 837.3KPa, 1022.0KPa; The solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 10% are respectively 999.8KPa, 1303.2KPa.
Embodiment 2
In embodiment 1, add 8 kg sodium carbonate, all the other implement as embodiment 1. results be that solidified earth test specimen 7d, the 28d unconfined compression strength that accounts for weak soil massfraction 5% is respectively 951.9KPa, 1283.0KPa; The solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 10% are respectively 1164.8KPa, 1479.0KPa.
Embodiment 3
In embodiment 1, add 8 kg sodium hydroxide, all the other implement as embodiment 1. results be that solidified earth test specimen 7d, the 28d unconfined compression strength that accounts for weak soil massfraction 5% is respectively 875.2KPa, 1108.5KPa; The solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 10% are respectively 1034.8KPa, 1416.6KPa.
Embodiment 4
Taking grinding to specific surface area is 550m
2the shrend high-titanium slag 44.4kg of/kg, PO42.5 cement 29.6kg, unslaked lime (the efficient oxidation calcium+content of magnesia>=70%) 18.5kg, sodium carbonate 7.5kg jointly mixes and stirs and all obtains a kind of soft soil curing agent of the present invention.According to above-mentioned test and test procedure, take respectively and account for the soft soil curing agent of weak soil massfraction 5%, 10% and the weak soil preparation solidified earth test specimen that stirs, measure 7d, 28d unconfined compression strength in the length of time.Result is that the solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 5% are respectively 1223.7KPa, 1325.1KPa; The solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 10% are respectively 1341.8KPa, 1572.5KPa.
Embodiment 5
Taking grinding to specific surface area is 450m
2the shrend high-titanium slag 47.6kg of/kg, PO42.5 cement 31.0kg, unslaked lime (the efficient oxidation calcium+content of magnesia>=70%) 16.7kg, sodium carbonate 4.8kg jointly mixes and stirs and all obtains a kind of soft soil curing agent of the present invention.According to above-mentioned test and test procedure, take respectively and account for the soft soil curing agent of weak soil massfraction 5%, 10% and the weak soil preparation solidified earth test specimen that stirs, measure 7d, 28d unconfined compression strength in the length of time.Result is that the solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 5% are respectively 1045.0KPa, 1371.9KPa; The solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 10% are respectively 1285.3KPa, 1488.7KPa.
Embodiment 6
Taking grinding to specific surface area is 450m
2the shrend high-titanium slag 47.6kg of/kg, PO42.5 cement 31.0kg, unslaked lime (the efficient oxidation calcium+content of magnesia>=70%) 16.7kg, sodium carbonate 2.4kg, sodium hydroxide 2.4kg jointly mixes and stirs and all obtains a kind of soft soil curing agent of the present invention.According to above-mentioned test and test procedure, take respectively and account for the soft soil curing agent of weak soil massfraction 5%, 10% and the weak soil preparation solidified earth test specimen that stirs, measure 7d, 28d unconfined compression strength in the length of time.Result is that the solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 5% are respectively 969.5KPa, 1245.5KPa; The solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 10% are respectively 1172.6KPa, 1343.1KPa.
Comparative example
Take and account for the PO42.5 cement of weak soil massfraction 5%, 10% and the weak soil preparation cement solidification soil test specimen that stirs, measure 7d, 28d unconfined compression strength in the length of time.Result is that the cement solidification soil test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 5% are only respectively 531.9KPa, 845.2KPa; The solidified earth test specimen 7d, the 28d unconfined compression strength that account for weak soil massfraction 10% are only respectively 680.7KPa, 927.6KPa.
Claims (6)
1. a high-titanium slag soft soil curing agent, is characterized in that: the raw material by following weight proportion is made after mixing,
High-titanium slag 40.0 ~ 60.0%
Ordinary Portland cement 25.0 ~ 40.0%
Unslaked lime 10.0 ~ 25.0%
Activating component 0 ~ 10.0%.
2. a kind of high-titanium slag soft soil curing agent according to claim 1, it is characterized in that: described high-titanium slag is that schreyerite stone is smelted in pig iron process, block or the granular waste residue forming after quenching, then amass the high-titanium slag powder into 350-550 ㎡/㎏ through grinding to specific grain surface.
3. a kind of high-titanium slag soft soil curing agent according to claim 1, is characterized in that: described activating component is one or the arbitrary composition in sodium carbonate or sodium hydroxide.
4. a kind of high-titanium slag soft soil curing agent according to claim 1, is characterized in that: described activating component is sodium carbonate.
5. a kind of high-titanium slag soft soil curing agent according to claim 1, is characterized in that: described unslaked lime effective CaO+MgO content >=70%.
6. the application of a kind of high-titanium slag soft soil curing agent described in claim 1 to 5 any one in soft clay ground.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104370483A (en) * | 2014-10-27 | 2015-02-25 | 中国石油天然气集团公司 | Cementing material for solidifying desulfurization gypsum into spheres |
| CN109400084A (en) * | 2018-12-07 | 2019-03-01 | 西南科技大学 | A kind of high solid waste alkali-activated carbonatite mentions titanium slag and stablizes soil and preparation method thereof |
| CN109502937A (en) * | 2018-12-07 | 2019-03-22 | 西南科技大学 | A kind of method of curing sludge and utilize the sludge curing agent for mentioning titanium slag |
| CN112030940A (en) * | 2020-06-23 | 2020-12-04 | 武汉谦诚桩工科技股份有限公司 | Marine-phase soft soil curing agent and in-situ premixed cement soil cast-in-place pile construction process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104370483A (en) * | 2014-10-27 | 2015-02-25 | 中国石油天然气集团公司 | Cementing material for solidifying desulfurization gypsum into spheres |
| CN109400084A (en) * | 2018-12-07 | 2019-03-01 | 西南科技大学 | A kind of high solid waste alkali-activated carbonatite mentions titanium slag and stablizes soil and preparation method thereof |
| CN109502937A (en) * | 2018-12-07 | 2019-03-22 | 西南科技大学 | A kind of method of curing sludge and utilize the sludge curing agent for mentioning titanium slag |
| CN109400084B (en) * | 2018-12-07 | 2021-09-28 | 西南科技大学 | High-solid waste alkali-activated titanium slag extraction stabilized soil and preparation method thereof |
| CN109502937B (en) * | 2018-12-07 | 2022-04-12 | 西南科技大学 | Method for solidifying sludge and sludge solidifying agent utilizing titanium extraction slag |
| CN112030940A (en) * | 2020-06-23 | 2020-12-04 | 武汉谦诚桩工科技股份有限公司 | Marine-phase soft soil curing agent and in-situ premixed cement soil cast-in-place pile construction process |
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| CN103911160B (en) | 2017-02-15 |
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Effective date of registration: 20180130 Address after: Lanting Pavilion 211600 Huaian city of Jiangsu province Jinhu County Xiyuan No. 28 shop 105 room Patentee after: Jinhu Heng Gu new material Co., Ltd. Address before: 211103, No. 59 West Wan An Road, Jiangning District, Jiangsu, Nanjing Patentee before: The large great achievement novel material of Jiangsu work company limited |