CN103452024A - Red clay roadbed solidified by industrial solid wastes - Google Patents
Red clay roadbed solidified by industrial solid wastes Download PDFInfo
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- CN103452024A CN103452024A CN2013103643747A CN201310364374A CN103452024A CN 103452024 A CN103452024 A CN 103452024A CN 2013103643747 A CN2013103643747 A CN 2013103643747A CN 201310364374 A CN201310364374 A CN 201310364374A CN 103452024 A CN103452024 A CN 103452024A
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Abstract
The invention discloses a red clay roadbed solidified by industrial solid wastes. The red clay roadbed comprises the following components in parts by weight: 5-10 parts of fluidized bed fuel coal sulfur fixation ash residues, 5-10 parts of electrolytic manganese residues and 100 parts of red clay, wherein the fluidized bed fuel coal sulfur fixation ash residues and the electrolytic manganese residues are taken as soil stabilizers. According to the red clay roadbed solidified by the industrial solid wastes, lime and cement are completely replaced with the industrial solid wastes which are taken as the stabilizers to solidify the red clay roadbed, so that the long-term strength and stability of the red clay roadbed are guaranteed, the hidden dangers of the roadbed are reduced, and the highway engineering construction quality of a red clay region is improved; furthermore, the industrial solid wastes are effectively utilized, the environmental pollution is avoided, the land resource is saved, and a purpose of recycling waste materials is realized.
Description
Technical field
The present invention relates to a kind of red clay subgrade, particularly a kind of industrial solid castoff solidifies red clay subgrade.
Background technology
Admaic earth is distributed widely in the south China area, from the Yunnan-Guizhou Plateau, through Southern Part of The Sichuan Basin, west place in Hubei, the western Hunan, Guangxi, to extending to the hilly and mountainous lands such as North Guangdong, Xiang Nan ,Wan Nan West Zhejiang Province, always exposes area over 200,000 square kilometres.Along with the continuous extension of China's speedway and highways at different levels, the highway of building at red clay area also increases gradually.Admaic earth is different from the engineering properties of unselected clay, it is a kind of special roadbed embankment material, the easy dehydration shrinkage cracking of the road bed filled with admaic earth, and the dehydration contraction will further increase crack width again after repeatedly soaking, be unfavorable for that roadbed globality and subgrade strength form, and have reduced subgrade stability.Because the southern area rainwater is many, longterm strength and the stability decreases of red clay subgrade under drying and watering cycle effect and action of traffic loading repeatedly, roadbed produces multiple diseases, and particularly distortion and surperficial shrinkage cracking are more serious.In road construction from now on, will there is the problem of a large amount of admaic earth road building technologies aspect, and the current domestic still imperfection of the constructing roadbed technology of admaic earth that utilizes, therefore how using admaic earth filling roadbed is the problem that needs further investigation.
Constructing roadbed at red clay area, lacking targetedly in the treatment measures situation, often adopt spoir to change and fill out, this a large amount of sides of abandoning not only occurs, and needs a large amount of soils of requisition to stack spoir, must build environment-friendly engineering simultaneously, affect construction speed, increase construction cost, and the destruction of causing ecological environment; As adopting the water proof sealing, the outsourcing water stability is the technical measures of low liquid limit soil preferably, complicated construction technique; And if adopt the Admixtures such as admixture gravel, lime, cement to reduce the filler water content, the method that changes its engineering properties processes, and has respectively reliability, high in cost of production technical problem.In general, soil solidification is processed, in red clay subgrade is processed, have have wide range of applications, adaptable characteristics, be reliable and stable technical measures, but that problem is expense is high.
Utilizing the local industry solid waste to build highway is an effective technological approaches of reducining the construction costs, and large quantity research has all been carried out in domestic many areas at present.Industrial solid wastes are the solid waste produced in activity in production, claim again industrial residue or industrial refuse.From the road application point, many industrial solid castoffs can recycling.Fully utilize industrial solid castoff as pavement construction material by appropriate ways, can significantly reduce the road construction cost, there is significant economy and social environment benefit.Fluidized bed burned-coal fluidized bed combustion coal ash/slag, electrolytic manganese residues are measure at present large and be difficult to the industrial solid castoff utilized, and major part adopts stacking, environment has been caused to serious harm.According to the physical chemistry of fluidized bed burned-coal fluidized bed combustion coal ash/slag, electrolytic manganese residues, form, the research that is applied to soil solidification also relatively lacks.
Summary of the invention
In view of this, the invention provides a kind of industrial solid castoff and solidify red clay subgrade, adopt industrial solid castoff replace lime, cement to solidify red clay subgrade as curing compound fully, can fully effectively utilize discarded object, solve longterm strength and the stability problem of red clay subgrade.
Industrial solid castoff of the present invention solidifies red clay subgrade, described red clay subgrade is comprised of fluidized bed burned-coal fluidized bed combustion coal ash/slag, electrolytic manganese residues and admaic earth, wherein fluidized bed burned-coal fluidized bed combustion coal ash/slag and electrolytic manganese residues are as soil-solidified-agent, each constituent mass proportioning is: 5～10 parts of fluidized bed burned-coal fluidized bed combustion coal ash/slags, 5～10 parts of electrolytic manganese residues, 100 parts of admaic earth.
Further, described fluidized bed burned-coal fluidized bed combustion coal ash/slag is dry ash discharge slag, CaO mass content>20% wherein, and particle diameter is greater than the granular mass content of 0.245mm<3%, "dead".
Further, the moisture content of described electrolytic manganese residues is 16%～20%, the granular mass content between particle diameter 0.25～0.048mm>95%.
Beneficial effect of the present invention is:
The fluidized bed burned-coal fluidized bed combustion coal ash/slag, be called for short combustion coal solid sulfur clinker or fluidized bed combustion coal ash/slag, refer to the lime-ash that coal and desulfurizing agent produce after mixed combustion in fluidized-bed combustion boiler, the grey shape thing of wherein collecting from flue is solid sulfur ash, the block that furnace bottom is discharged is that solid sulphur slag is (referring to " Activity evaluation of fluidized bed combustion coal ash/slag with desulphurization ", the coal journal, the 31st the 4th phase of volume, in August, 2006).Electrolytic manganese residues is that sulfuric acid process leaching manganese carbonate ore prepares the high solid waste (referring to " electrolytic manganese residues research of utilization ", Li Mingyan, University Of Chongqing's Master's thesis, 2010) of a kind of moisture content produced after electrolytic manganese liquid.The present invention adopts fluidized bed burned-coal fluidized bed combustion coal ash/slag and electrolytic manganese residues as curing agent modified curing admaic earth, its mechanism is: the impact on the admaic earth microstructure of fluidized bed combustion coal ash/slag and manganese solid impurity particle comprises physical mechanics process, chemical process and the large process of physical and chemical process three; Admaic earth is to be the basic granules unit by clay particle group, Fe
2o
3nH
2o, SiO
2nH
2the iron such as O, silicon and aluminum oxide encase clay particle group with cementation method, by the cementing integral body that is formed by connecting, as shown in Figure 1; After admixture fluidized bed combustion coal ash/slag, manganese solid impurity particle, physics filling effect due to the solid waste particle, reduce in space between clay particle group, and due to physical and chemical process, adsorption process as each component in soil particle and curing compound, comprise physical absorption, chemisorbed and physical and chemical adsorption, the virgin rubber network of knotting is destroyed, admaic earth grain after modification is in pulverizing, mix and compacting process, soil body elementary cell is easier to close to each other under external force, reduce soil body porosity, this physical mechanics effect further increases compactness; Prior Strength Forming Mechanism is chemical action, forms stronger adhesion strength between soil particle, comprises pozzolanic action, Ca (OH)
2the self-hardening property of crystallization, carbonation, ion exchange and lime-ash itself, this effect makes modification admaic earth mechanical property significantly reduced by the impact of full water and drying and watering cycle.Therefore, the invention has the advantages that:
1) solve longterm strength and the stability problem of red clay subgrade, reduced roadbed hidden danger, improved red clay area highway engineering construction quality;
2) effectively utilize industrial solid castoff as constructional materials, avoided environment pollution, saved land resources, realized the purpose turned waste into wealth;
3) owing to not needing the cementitious matters such as cement, lime fully, significantly reduce the curing compound cost, adopted the synergy of different solid waste, by catalysis, excite the more gum materials of generation, filling space or form the intensity skeleton;
4) construction technology is simple, easy to utilize, and, because solidified earth is insensitive to optimum moisture content, construction quality is more easily controlled.
The accompanying drawing explanation
The grain group cement structure schematic diagram that Fig. 1 is admaic earth.
The specific embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below will be described in detail the preferred embodiments of the present invention:
Embodiment 1
The industrial solid castoff of the present embodiment solidifies red clay subgrade and is comprised of fluidized bed burned-coal fluidized bed combustion coal ash/slag, electrolytic manganese residues and admaic earth, wherein fluidized bed burned-coal fluidized bed combustion coal ash/slag and electrolytic manganese residues are as soil-solidified-agent, each constituent mass proportioning is: 5 parts of fluidized bed burned-coal fluidized bed combustion coal ash/slags, 5 parts of electrolytic manganese residues, 100 parts of admaic earth.
Embodiment 2
The industrial solid castoff of the present embodiment solidifies red clay subgrade and is comprised of fluidized bed burned-coal fluidized bed combustion coal ash/slag, electrolytic manganese residues and admaic earth, wherein fluidized bed burned-coal fluidized bed combustion coal ash/slag and electrolytic manganese residues are as soil-solidified-agent, each constituent mass proportioning is: 8 parts of fluidized bed burned-coal fluidized bed combustion coal ash/slags, 7 parts of electrolytic manganese residues, 100 parts of admaic earth.
Embodiment 3
The industrial solid castoff of the present embodiment solidifies red clay subgrade and is comprised of fluidized bed burned-coal fluidized bed combustion coal ash/slag, electrolytic manganese residues and admaic earth, wherein fluidized bed burned-coal fluidized bed combustion coal ash/slag and electrolytic manganese residues are as soil-solidified-agent, each constituent mass proportioning is: 10 parts of fluidized bed burned-coal fluidized bed combustion coal ash/slags, 10 parts of electrolytic manganese residues, 100 parts of admaic earth.
In embodiment 1～3, solid waste raw material quality control parameter is: the fluidized bed burned-coal fluidized bed combustion coal ash/slag is dry ash discharge slag, CaO mass content>20% wherein, and particle diameter is greater than the granular mass content of 0.245mm<3%, "dead"; The moisture content of electrolytic manganese residues is 16%～20%, the granular mass content between particle diameter 0.25～0.048mm>95%.
The job practices of the red clay subgrade of embodiment 1～3, comprise the step of blending craft, compacting construction and maintenance; Wherein mix and stir technique and can adopt respectively field to mix and stir road mix, as for the debit fills, take field to mix as main, as be the roadbed cut-fill transition, take road mix as main, in roadbed material paves, can select to adopt the mode of admaic earth and composite curing layers of material spread to carry out; Control the moisture content that rolls of filler in the compacting work progress well, select suitable compaction by rolling technique.
Get respectively the red clay subgrade soil sample of embodiment 1～3, adopt the dry ground legal system to make near the real test specimen that hits optimum moisture content, according to its CBR value of bearing ratio (CBR) experimental test in " highway earthwork test rule ", to estimate the intensity of roadbed, and adopt 3 sample CBR of drying and watering cycle further to reflect soil matrix strength stability under truth, result of the test is as shown in the table:
As can be seen here, although the original state admaic earth adopted in test can also meet lower grade road (three, Class IV highway) the roadbed minimum strength needs that partly banket, after drying and watering cycle, can not meet code requirement; Admaic earth after fluidized bed burned-coal fluidized bed combustion coal ash/slag and electrolytic manganese residues modification, can meet the requirement of highways at different levels to roadbed filling, and significantly reduced by the impact of drying and watering cycle, therefore show that Strength and stability is improved significantly, illustrate that the red clay subgrade of embodiment 1～3 can be applied in Practical Project.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although by with reference to the preferred embodiments of the present invention, invention has been described, but those of ordinary skill in the art is to be understood that, can make various changes to it in the form and details, and not depart from the spirit and scope of the present invention that appended claims limits.
Claims (3)
1. an industrial solid castoff solidifies red clay subgrade, it is characterized in that: described red clay subgrade is comprised of fluidized bed burned-coal fluidized bed combustion coal ash/slag, electrolytic manganese residues and admaic earth, wherein fluidized bed burned-coal fluidized bed combustion coal ash/slag and electrolytic manganese residues are as soil-solidified-agent, each constituent mass proportioning is: 5～10 parts of fluidized bed burned-coal fluidized bed combustion coal ash/slags, 5～10 parts of electrolytic manganese residues, 100 parts of admaic earth.
2. industrial solid castoff according to claim 1 solidifies red clay subgrade, it is characterized in that: described fluidized bed burned-coal fluidized bed combustion coal ash/slag is dry ash discharge slag, CaO mass content>20% wherein, particle diameter is greater than the granular mass content of 0.245mm<3%, "dead".
3. industrial solid castoff according to claim 1 solidifies red clay subgrade, and it is characterized in that: the moisture content of described electrolytic manganese residues is 16%～20%, the granular mass content between particle diameter 0.25～0.048mm>95%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000096051A (en) * | 1998-09-21 | 2000-04-04 | Mitsubishi Materials Corp | Solidifying material for soil improvement |
| CN101906304A (en) * | 2010-08-11 | 2010-12-08 | 中国建筑科学研究院 | Soil curing agent and using method thereof |
| JP2012193223A (en) * | 2011-03-15 | 2012-10-11 | Nippon Paper Industries Co Ltd | Method for treating dredged sedimentary soil |
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2013
- 2013-08-20 CN CN201310364374.7A patent/CN103452024B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000096051A (en) * | 1998-09-21 | 2000-04-04 | Mitsubishi Materials Corp | Solidifying material for soil improvement |
| CN101906304A (en) * | 2010-08-11 | 2010-12-08 | 中国建筑科学研究院 | Soil curing agent and using method thereof |
| JP2012193223A (en) * | 2011-03-15 | 2012-10-11 | Nippon Paper Industries Co Ltd | Method for treating dredged sedimentary soil |
Non-Patent Citations (3)
| Title |
|---|
| 周长波等: "电解锰废渣综合利用研究进展", 《环境科学研究》 * |
| 尹元坤: "固硫灰渣制备路基材料的研究", 《西南科技大学硕士学位论文》 * |
| 张凯: "流化床燃煤固硫灰固化淤泥土路用性能研究", 《重庆大学硕士学位论文》 * |
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