CN113264737A - Multisource solid waste foundation hardening agent for reinforcing soft soil roadbed and application - Google Patents
Multisource solid waste foundation hardening agent for reinforcing soft soil roadbed and application Download PDFInfo
- Publication number
- CN113264737A CN113264737A CN202110699598.8A CN202110699598A CN113264737A CN 113264737 A CN113264737 A CN 113264737A CN 202110699598 A CN202110699598 A CN 202110699598A CN 113264737 A CN113264737 A CN 113264737A
- Authority
- CN
- China
- Prior art keywords
- hardening agent
- soft soil
- solid waste
- multisource
- cement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 73
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 39
- 239000002910 solid waste Substances 0.000 title claims abstract description 22
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 30
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 239000011575 calcium Substances 0.000 claims abstract description 12
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- 239000002956 ash Substances 0.000 claims description 35
- 238000006477 desulfuration reaction Methods 0.000 claims description 28
- 230000023556 desulfurization Effects 0.000 claims description 28
- 239000002893 slag Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 13
- 229910052593 corundum Inorganic materials 0.000 claims description 13
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 13
- 229910052681 coesite Inorganic materials 0.000 claims description 9
- 229910052906 cristobalite Inorganic materials 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 229910052682 stishovite Inorganic materials 0.000 claims description 9
- 229910052905 tridymite Inorganic materials 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 239000004848 polyfunctional curative Substances 0.000 claims description 6
- 239000004567 concrete Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 32
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 10
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 10
- 239000004571 lime Substances 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 7
- 229910001653 ettringite Inorganic materials 0.000 description 7
- 239000000378 calcium silicate Substances 0.000 description 5
- 229910052918 calcium silicate Inorganic materials 0.000 description 5
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 5
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 239000008239 natural water Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002800 Si–O–Al Inorganic materials 0.000 description 3
- 229910002808 Si–O–Si Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 210000004127 vitreous body Anatomy 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a multisource solid waste base hardening agent for reinforcing a soft soil roadbed and application thereof, wherein the hardening agent is formed by mixing 17-42% of desulfurized ash, 33-68% of metallurgical waste residue and 12-30% of cement in percentage by weight. The hardening agent can replace cement or lime by 100 percent and is used for soft soil roadbed treatment and reinforcement, and the dosage ratio of the hardening agent to the soft soil is 4 to 16 percent. The solid waste base hardening agent for reinforcing the soft soil roadbed provided by the invention utilizes effective calcium and CaCO in desulfurized ash3Sulfite and sulfate radicals, and the like, convert free water in the soft soil into bound water through chemical curing, physical water absorption and other modes, improve the strength of the soft soil, obviously improve the curing effect under the same mixing amount over the traditional modes of cement, lime and the like, and greatly shorten the curing period.
Description
Technical Field
The invention relates to the technical field of road construction, in particular to a multisource solid waste foundation hardening agent for reinforcing a soft soil roadbed and application thereof.
Background
The water level of the underground water in the areas along the rivers and the coastal areas such as Shanghai is higher, the soil is soft and low in strength, and the settlement and deformation are easy to occur under the action of external force, so that the 'spring soil' is formed. Therefore, the roadbed constructed on the soft soil foundation needs to be reinforced, and the strength, stability index and the like of the roadbed meet the design and standard requirements.
At present, the most common methods for reinforcing the soft soil roadbed include a reinforcing method, a replacement method and an improvement method, and the most common reinforcing materials in the reinforcing method are cement, lime and the like. However, when cement is used as a construction material, on the one hand, the cost is high, and on the other hand, the strength of cement soil is slowly increased due to the high water content in soft soil, and the reinforcing effect is not ideal. Lime reinforcement also faces the problems of high cost, low strength, long maintenance period and the like.
Along with falling of a flue gas desulfurization policy, flue gas desulfurization of various power plants and steel plants is forcibly implemented, desulfurization ash residues are solid wastes generated by dry-process and semi-dry-process desulfurization in the power plants and the steel plants, and are different from dihydrate gypsum which is a byproduct of wet-process desulfurization, the desulfurization ash residues generated by the dry-process and semi-dry-process desulfurization belong to high-calcium high-sulfur type ash residues and overhigh CaSO3、CaSO4f-CaO and CaCO3Limiting its application in cement concrete.
Therefore, in view of saving natural resources and utilizing waste, it is necessary to develop a novel hardening agent capable of replacing natural resources such as cement and lime by using various solid wastes.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects in the prior art, and provide the multisource solid waste base hardening agent for soft soil roadbed reinforcement, which can convert free water in a soil body into crystal water by simultaneously utilizing the physicochemical water absorption and chemical curing effects of the curing agent, and can generate hydrated calcium silicate with a cementing effect after the hardening agent is hydrated, so that the strength of reinforced soil is greatly improved.
When the curing agent achieves the same curing effect as cement and lime, the mixing amount and the cost price are far lower than those of cement and lime, so that the compatibilization effect caused by the mixing of cement and the like is effectively reduced, and more soil can be cured; meanwhile, the application of the hardening agent provides a resource utilization approach for low-value solid wastes with poor stability such as desulfurized ash, steel slag and the like.
The technical problem to be solved by the present invention can be implemented by the following technical means.
The multisource solid waste base hardening agent for reinforcing the soft soil roadbed is characterized in that desulfurization ash, metallurgical waste residues and cement are used as raw materials, and the hardening agent is formed by mixing 17-42% of desulfurization ash, 33-68% of metallurgical waste residues and 12-30% of cement in percentage by weight.
As a further improvement of the technical scheme, the desulfurized ash is solid waste obtained after desulfurization by a dry method or a semi-dry method in a power plant or a steel sintering process.
As a further improvement of the technical scheme, the desulfurized ash residue is one or more of power plant desulfurized ash or sintered desulfurized ash.
As a further improvement of the technical scheme, the two kinds of desulfurization ash are high-calcium high-sulfur ash; when the desulfurized fly ash is produced in the steel sintering process, the chemical composition is mainly CaCO3And CaSO3Mainly comprises the following steps of; when the material is power plant desulfurization ash, the chemical composition is SiO2And Al2O3Mainly contains a certain amount of SO3f-CaO and CaSO3。
Further, the metallurgical waste slag is one or more of blast furnace granulated slag powder and steel slag powder.
And further, when the metallurgical waste slag is blast furnace granulated slag powder, the fineness and the activity index at least meet the requirement of S95 grade mineral powder in GBT18046 granulated blast furnace slag powder used in cement, mortar and concrete.
Still further, when the metallurgical waste slag is steel slag powder, the specific surface area and the activity index of the metallurgical waste slag meet the requirements of GBT20491 steel slag powder used in cement and concrete.
The invention also aims to provide application of the multisource solid waste base hardening agent for reinforcing the soft soil roadbed, wherein when the hardening agent is used for reinforcing the roadbed, the using amount ratio of the curing agent to soil is 4-16%.
The reaction mechanism of the multisource solid waste base hardening agent for reinforcing the soft soil roadbed is that the chemical components of the desulfurization ash residue change greatly due to the difference of the desulfurization process and the ash residue source, and when the desulfurization ash residue is from the steel sintering process, high-content CaCO is firstly contained3The physical water absorption function is exerted, and the water content of the soil body can be effectively reduced; secondly, the effective calcium in the desulfurization ash reacts with water to generate Ca (OH)2，OH-The presence of the acid causes the Si-O-Si and Al-O-Al of the slag vitreous body to be broken and to be re-polymerized to form calcium silicate hydrate and calcium aluminate hydrate gel, and the SO in the system4 2-And SO3 2-Reacting with active aluminum and hydrated calcium aluminate in slag to generate trisulfide hydrated calcium sulphoaluminate (AFt) or flaky hydrated calcium sulphoaluminate (3 CaO. Al) similar to ettringite2O3·CaSO3·11H2O), newly generated hydration products are filled in the pores of the soft soil, so that the compactness of the solidified soil is improved; meanwhile, the generated ettringite or ettringite-like stone contains 32 crystal water and 11 crystal water respectively, so that free water in a soil body is changed into crystal water, and the strength of the solidified soil is further improved.
When the desulfurized ash comes from the dry or semi-dry flue gas desulfurization process, SiO in the desulfurized ash2、Al2O3Can participate in the hydration reaction of cement; at the same time, CaSO3The presence of the calcium aluminate also reacts with the activated aluminum and the hydrated calcium aluminate in the slag, thereby improving the strength of the solidified soil.
In conclusion, the XRD pattern of the cement clinker doped with desulfurized ash is shown in figure 1.
In cement-based materials, ettringite produced by hydration can increase solid phase volume by about 120%, and is easy to cause a series of stability problems such as expansion and cracking of the ettringite, so that the production amount of ettringite must be strictly controlled. The invention utilizes the characteristic of the volume expansion of the ettringite to convert free water in the high-water-content roadbed soil into crystal water through chemical reaction, and then the generated ettringite is fully filled in loose and porous soil to increase the compactness of the soil.
The hardening agent is fully mixed and rolled with the soil body with high water content, on one hand, the hardening agent can generate 32 parts of crystal water of ettringite in the soil body, free water in the soil body is converted into crystal water, and pores among the soil bodies are fully filled; on the other hand, f-CaO, CaCO in the hardening agent3And the content of free water in the soil body is further reduced through the chemical-physical water absorption effect. In addition, as the hydration reaction is continuously carried out, calcium silicate hydrate with the cementing effect is continuously generated, and the strength of the reinforced soil is further improved.
Drawings
FIG. 1 is an XRD pattern of a set cement doped with desulphurised ash; aims to explain the reaction mechanism of the hydration product of the desulfurized ash cement.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Before the present embodiments are further described, it is to be understood that the scope of the invention is not limited to the particular embodiments described below; it is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.
When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any value therebetween can be selected unless the invention otherwise indicated. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition to the specific methods, devices, and materials used in the examples, any methods, devices, and materials similar or equivalent to those described in the examples may be used in the practice of the invention in addition to the specific methods, devices, and materials used in the examples, in keeping with the knowledge of one skilled in the art and with the description of the invention.
Example 1
Mixing dry desulfurization ash, PO42.5 cement and metallurgical waste slag powder in proportion (sintering dry desulfurization ash: PO42.5 cement: metallurgical waste slag powder (S95 mineral powder: steel slag powder: 7: 3): 40%: 20%: 40%), high-moisture-content soft soil roadbed natural moisture content is 26%, drying and grinding the mixture through a 2.36mm sieve for later use.
And (3) carrying out optimal moisture content and maximum dry density tests on the prepared hardening agent according to 5%, 8%, 10%, 12% and 16% of the mass of the soft soil, forming a test piece according to the optimal moisture content, and testing the 7d unconfined compressive strength of the solidified soil. The following table 1 shows the data related to the unconfined compressive strength of the solidified soil 7 d.
Table 1:
as can be seen from Table 1, the optimum water content in the laboratory test is lower than the natural water content of the soil of the foundation of the soil, and the strength advantage is not obvious when the mixing amount is equal to that of the cement, but the strength is obviously higher than that of the lime soil when the mixing amount is equal to that of the lime.
According to the field construction process, after a hardening agent and high-moisture-content wet soil (natural moisture content, about 26%) are directly stirred and cured for 7 days, the unconfined compressive strength of the cured soil body is tested, and the experimental results are shown in the following table 2.
Table 2: 7d unconfined compressive strength of solidified soil
As can be seen from Table 2, the 7d unconfined compressive strength of the soil solidified by the hardener is better than that of cement and lime with the same mixing amount under the natural water content.
Example 2
In the embodiment, an on-site construction process is adopted, 8% of hardening agent is added to be directly mixed with a natural soil body (the natural water content is about 31%), after curing is carried out for 7 days, the 7d unconfined compressive strength of the cured soil body is tested, and the mixing ratio and the experimental results of the hardening agent are shown in the following table 3.
Table 3: mixing ratio (%) of curing agent and unconfined compressive strength of cured soil body
As can be seen from table 3, the hardening agent is superior to the cement in the reinforcing effect on the soil body with high water content when the mixing amount is the same, because the hardening agent has the physical-chemical double water absorption effect: on the one hand, a high CaCO content in the hardener3The physical water absorption function is exerted, and the water content of the soil body is effectively reduced; secondly, the effective calcium in the desulfurization ash reacts with water to generate Ca (OH)2，OH-The existence of the acid-base catalyst promotes the Si-O-Si and Al-O-Al of the slag vitreous body to break, and the Si-O-Si and Al-O-Al are polymerized again to generate calcium silicate hydrate and calcium aluminate hydrate gel, and finally the calcium silicate hydrate gel and SO in the system4 2-And SO3 2-Reacting to generate trisulfide type hydrated calcium sulphoaluminate (AFt) or flaky hydrated calcium sulphoaluminate (3 CaO. Al) similar to ettringite2O3·CaSO3·11H2O), free water in the soil body is further changed into bound water, and the strength of the solidified soil is improved.
Specifically, it can be represented by the following formula:
xCa(OH)2+SiO2+(n-1)H2O→xCaO·SiO2·nH2O
(1.5～2.0)CaO·SiO2·aq+SiO2→(0.8～1.5)CaO·SiO2·aq
3CaO·Al2O3·6H2O+SiO2+mH2O→xCaO·SiO2·mH2O+yCaO·Al2O3·nH2O
xCa(OH)2+Al2O3+mH2O→xCaO·Al2O3·nH2O
3Ca(OH)2+Al2O3+2SiO2+mH2O→3CaO·Al2O3·2SiO2·nH2O
3CaO·Al2O3·6H2O+Ca(OH)2+6H2O→4CaO·Al2O3·13H2O
4CaO·Al2O3·13H2O+3(CaSO4·2H2O)+14H2O→3CaO·Al2O3·3CaSO4·32H2O+Ca(OH)2
example 3
The embodiment mainly relates to an on-site pilot test, in which a curing agent is used for reinforcing a soil subgrade in a certain area of Shanghai city, the natural water content of the soil subgrade is about 33%, a hardening agent (cement: S95 mineral powder: sintering dry desulfurization ash) with 6% is used for reinforcing a soil body, a small road roller is used for compacting the first reinforcement, the reinforced soil is stirred and turned after curing for 7 days, the secondary reinforcement is carried out, the soil body is rolled after continuous curing, and the rebound deflection value of the reinforced soil subgrade is tested and is shown in the following table 4.
Table 4: rebound deflection value of soil subgrade
As can be seen from Table 4, the rebound deflection value of the soil roadbed is between 140 and 380(0.01mm), and the design construction requirements are met.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The multisource solid waste base hardening agent for reinforcing the soft soil roadbed is characterized in that desulfurized ash residues, metallurgical waste residues and cement are used as raw materials, and the hardening agent is formed by mixing 17-42% of desulfurized ash residues, 33-68% of metallurgical waste residues and 12-30% of cement in percentage by weight.
2. The multisource solid waste base hardening agent for soft soil roadbed reinforcement of claim 1, wherein the desulfurization ash is solid waste obtained after dry and semi-dry desulfurization in a power plant or a steel sintering process.
3. The multisource solid waste base hardening agent for soft soil roadbed reinforcement according to claim 1 or 2, wherein the desulfurization ash residue is one or more of power plant desulfurization ash or sintering desulfurization ash.
4. The multisource solid waste based hardener for soft soil subgrade reinforcement of claim 2, wherein both of the two kinds of desulfurization ash are high calcium and high sulfur type ash; when the desulfurized fly ash is produced in the steel sintering process, the chemical composition is mainly CaCO3And CaSO3Mainly comprises the following steps of; when the material is power plant desulfurization ash, the chemical composition is SiO2And Al2O3Mainly contains a certain amount of SO3f-CaO and CaSO3。
5. The multisource solid waste base hardening agent for soft soil roadbed reinforcement of claim 1, wherein the metallurgical slag is one or more of blast furnace granulated slag powder and steel slag powder.
6. The multisource solid waste base hardening agent for soft soil roadbed reinforcement according to claim 1 or 5, characterized in that when the metallurgical waste slag is blast furnace granulated slag powder, the fineness and the activity index at least meet the requirement of S95 grade mineral powder in GBT18046 granulated blast furnace slag powder for cement, mortar and concrete.
7. The multisource solid waste base hardening agent for soft soil roadbed reinforcement according to claim 1 or 5, characterized in that when the metallurgical waste residue is steel slag powder, the specific surface area and the activity index meet the requirements of GBT20491 steel slag powder for cement and concrete.
8. Use of the multisource solid waste base hardener for soft soil subgrade reinforcement according to any of claims 1-7, characterized in that the hardener is used for subgrade reinforcement with a ratio of hardener to soil of 4% to 16%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110699598.8A CN113264737A (en) | 2021-06-23 | 2021-06-23 | Multisource solid waste foundation hardening agent for reinforcing soft soil roadbed and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110699598.8A CN113264737A (en) | 2021-06-23 | 2021-06-23 | Multisource solid waste foundation hardening agent for reinforcing soft soil roadbed and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113264737A true CN113264737A (en) | 2021-08-17 |
Family
ID=77235780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110699598.8A Pending CN113264737A (en) | 2021-06-23 | 2021-06-23 | Multisource solid waste foundation hardening agent for reinforcing soft soil roadbed and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113264737A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113979698A (en) * | 2021-12-01 | 2022-01-28 | 上海市建筑科学研究院有限公司 | Desulfurized fly ash based soil body curing agent and preparation method thereof |
| CN115806417A (en) * | 2022-11-17 | 2023-03-17 | 上海申环环境工程有限公司 | Engineering muck curing agent and preparation method thereof |
| CN116161909A (en) * | 2023-01-03 | 2023-05-26 | 新疆交通建设集团股份有限公司 | Method for treating wet soft foundation by using converter steel slag and blowing desulfurization slag |
| CN117945703A (en) * | 2023-12-27 | 2024-04-30 | 佛山市交通科技有限公司 | Soil cementing material for high-water-content soil, preparation method and application |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004051410A (en) * | 2002-07-19 | 2004-02-19 | Denki Kagaku Kogyo Kk | Solidifier and process for cleaning contaminated soil using this |
| KR101299163B1 (en) * | 2013-05-10 | 2013-08-22 | (주)대우건설 | Firming composition for hardening weak ground using early-strength cement and industrial by-product of minerals and the manufacturing method thereof |
| CN104045293A (en) * | 2014-06-17 | 2014-09-17 | 东南大学 | Soil curing agent based on desulfurized fly ash activity and preparation method and application thereof |
| CN105110717A (en) * | 2015-07-20 | 2015-12-02 | 上海宝田新型建材有限公司 | Foundation reinforcement material, preparation method and application thereof |
| CN105130290A (en) * | 2015-07-20 | 2015-12-09 | 上海宝田新型建材有限公司 | Preparation method of foundation reinforcement material |
| CN105236908A (en) * | 2015-10-22 | 2016-01-13 | 浙江大学宁波理工学院 | Soft soil curing agent prepared by means of industrial residues |
| 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 |
| CN112358254A (en) * | 2020-10-10 | 2021-02-12 | 上海美创建筑材料有限公司 | Soil hardening agent and preparation method and application thereof |
-
2021
- 2021-06-23 CN CN202110699598.8A patent/CN113264737A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004051410A (en) * | 2002-07-19 | 2004-02-19 | Denki Kagaku Kogyo Kk | Solidifier and process for cleaning contaminated soil using this |
| KR101299163B1 (en) * | 2013-05-10 | 2013-08-22 | (주)대우건설 | Firming composition for hardening weak ground using early-strength cement and industrial by-product of minerals and the manufacturing method thereof |
| CN104045293A (en) * | 2014-06-17 | 2014-09-17 | 东南大学 | Soil curing agent based on desulfurized fly ash activity and preparation method and application thereof |
| CN105110717A (en) * | 2015-07-20 | 2015-12-02 | 上海宝田新型建材有限公司 | Foundation reinforcement material, preparation method and application thereof |
| CN105130290A (en) * | 2015-07-20 | 2015-12-09 | 上海宝田新型建材有限公司 | Preparation method of foundation reinforcement material |
| CN105236908A (en) * | 2015-10-22 | 2016-01-13 | 浙江大学宁波理工学院 | Soft soil curing agent prepared by means of industrial residues |
| 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 |
| CN112358254A (en) * | 2020-10-10 | 2021-02-12 | 上海美创建筑材料有限公司 | Soil hardening agent and preparation method and application thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113979698A (en) * | 2021-12-01 | 2022-01-28 | 上海市建筑科学研究院有限公司 | Desulfurized fly ash based soil body curing agent and preparation method thereof |
| CN115806417A (en) * | 2022-11-17 | 2023-03-17 | 上海申环环境工程有限公司 | Engineering muck curing agent and preparation method thereof |
| CN115806417B (en) * | 2022-11-17 | 2023-10-20 | 上海申环环境工程有限公司 | Engineering residue soil curing agent and preparation method thereof |
| CN116161909A (en) * | 2023-01-03 | 2023-05-26 | 新疆交通建设集团股份有限公司 | Method for treating wet soft foundation by using converter steel slag and blowing desulfurization slag |
| CN117945703A (en) * | 2023-12-27 | 2024-04-30 | 佛山市交通科技有限公司 | Soil cementing material for high-water-content soil, preparation method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Irassar et al. | Sulphate resistance of type V cements with limestone filler and natural pozzolana | |
| CN113264737A (en) | Multisource solid waste foundation hardening agent for reinforcing soft soil roadbed and application | |
| Gartner et al. | A review of alternative approaches to the reduction of CO2 emissions associated with the manufacture of the binder phase in concrete | |
| Thomas | Supplementary cementing materials in concrete | |
| CN109437801B (en) | Modifier for high liquid limit clay road | |
| CN110563397B (en) | Dry-process desulfurized ash-based low-clinker high-permeability-resistance type field level hardening material | |
| TWI701228B (en) | Concrete composition and method for producing the same | |
| CN101717213A (en) | Soil body reinforcing agent and preparation method and application thereof | |
| Wright et al. | Sustainability of desulphurised (FGD) waste in construction | |
| JP4818503B2 (en) | Low hexavalent chromium injection material | |
| CN101412595A (en) | Method for preparing concrete admixture from kaoline tailing | |
| CN110698122B (en) | Ecological light filler and preparation method thereof | |
| Damtoft et al. | Concrete binders, mineral additions and chemical admixtures: state of the art and challenges for the 21st century | |
| CN115677311A (en) | Composite curing agent and preparation method and application thereof | |
| KR100492621B1 (en) | Manufacture Method of Calcium Chloro-Aluminate Clinker Using Municipal Solid Waste Incineration Ash and Sewage Sludge | |
| Li et al. | Red mud modified phosphogypsum based self-leveling mortar: Hydration mechanism, heavy metal migration law and spatial distribution characteristics | |
| KR100580583B1 (en) | Concrete products with high-strength using reclaimed coal ash and waste stone powder as fine aggregates and its manufacturing method | |
| Coffetti | Alternative binders as milestone of 3R strategy for sustainable construction materials | |
| CN110304885A (en) | The cement mortar and preparation method thereof of high additive solid waste preparation | |
| KR100544062B1 (en) | Crack inhibitor for cement mortar | |
| Luke | Pulverized fuel ash as a cement extender | |
| Lin et al. | Strength of limestone-based non-calcined cement and its properties | |
| Guo et al. | Effects of a combined admixture of slag powder and thermally treated flue gas desulphurization (FGD) gypsum on the compressive strength and durability of concrete | |
| CN118307287B (en) | Cementing material for highway pavement base layer and preparation method and application thereof | |
| CN114685073B (en) | Chalcogenide magnesium cementing material and use method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210817 |