CN109485353A - A kind of novel steel slag composite soil road basement material and preparation method - Google Patents

A kind of novel steel slag composite soil road basement material and preparation method Download PDF

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Publication number
CN109485353A
CN109485353A CN201910049535.0A CN201910049535A CN109485353A CN 109485353 A CN109485353 A CN 109485353A CN 201910049535 A CN201910049535 A CN 201910049535A CN 109485353 A CN109485353 A CN 109485353A
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China
Prior art keywords
parts
steel slag
soil
slag
water
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Inventor
黄伟
邱鹏
赵鲁卿
唐刚
郭卫东
王宗森
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Anhui Magang Jiahua New Type Building Material Co Ltd
Anhui University of Technology AHUT
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Anhui Magang Jiahua New Type Building Material Co Ltd
Anhui University of Technology AHUT
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Priority to CN201910049535.0A priority Critical patent/CN109485353A/en
Publication of CN109485353A publication Critical patent/CN109485353A/en
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    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • 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

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  • 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)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The invention discloses a kind of steel slag composite soil road basement material and preparation methods, it is made of the following raw material for accounting for total weight specific gravity: 0-15 parts of water, 40-80 parts of normal soils, 20-60 parts without ripening steel slag, 5-25 parts of complexing agents, 1-5 parts of cement, 0.01-0.05 parts of modifying agent, preparation method includes carrying out compaction test after mixing steel slag, soil, cement, complexing agent, measures optimum moisture content；Steel slag carries out break process；By the tap water of steel slag and complexing agent sprinkling total Water 50%, is sufficiently mixed, obtain ground-slag mixture；Spraying modified dose and remaining tap water is mixed in normal soil, obtains Modified soil；Ground-slag mixture is mixed and stirred with Modified soil, portland cement, is compacted, road basement material is obtained, the present invention can sufficiently realize metallurgical solid waste resource reutilization, reduce the pollution in steel slag stacking ageing process to environment；Again can effectively save sandstone material, avoid sand material exploitation caused by ecological environment destruction, have significant economic and social benefit.

Description

A kind of novel steel slag composite soil road basement material and preparation method
Technical field
The present invention relates to road basement material and its preparation technical fields, and in particular to a kind of novel steel slag composite soil road Base material and preparation method.
Background technique
With the rapid development of steel and iron industry, the discharge amount of steel slag expands year by year.China is used as whole world Chan Gang big country, by every It produces 1 ton of crude steel and generates 0.2-0.5 tons of steel slags calculating, about 50,000,000 tons of China's steel slag annual output, accumulate steel slag up to 6,000,000,000 tons More than.A large amount of steel slag can not be disposed effectively, and a large amount of soils have both been occupied, and pollute environment, and cause the waste of resource；In addition, The country of attention with to(for) environmental issue, good natural sand building stones price rise steadily, and as traditional road, base is main The cement stabilized macadam of material is big to sandstone demand, thus road construction cost is caused sharply to rise.Steel slag possesses potentially Gelling property has many advantages, such as that intensity is high, wearability is good, if can be in the road project of sandstone material source relative difficulty In, it as road-making material application, can both realize metallurgical solid waste resource reutilization, and reduce steel slag and stack in ageing process to ring The pollution in border；Again can effectively save sandstone material, avoid ecological environment destruction caused by sand material exploitation, there is significant warp Ji and social benefit.But steel slag stability is poor, meets water and is also easy to produce volume expansion, thus steel slag is limited in road engineering The application in field.Mainly since free calcium oxide in steel slag f-CaO meets water hydration reaction generation occurs for the volume expansion of steel slag Ca(OH)2, caused by 1.98 times of volume increase.
It is relatively more to steel slag solid waste investigation of materials both at home and abroad at present, for example, CN101343852A discloses a kind of utilization The method that steel slag fills highway subgrade.The patent document is said mainly for steel slag roadbed filling process It is bright, and do not innovated from the use of raw material, it is all the utilization of steel slag solid waste, this patent document only relates to road foundation Part is filled, and in road construction, the building intensity requirement of roadbed part will be far below roadbase.It is then answered herein for steel slag For the application of road surface structure layer base, steel slag expansion is solved simultaneously, maximize and play steel slag good pavement performance.
CN104278609A is disclosed the road pavements and its method of dregs and the compound preparation of steel slag.Patent text It offers that middle utilization rate of steel slag is lower, and has more stringent Particle size requirements to steel slag specification；In addition, solving the problems, such as steel slag expansion And meet road filling performance indexes require such as unconfined compressive strength, water stability do not refer to too much, because This is only suitable for road foundation filler requirement.
CN106968237A discloses a kind of utilization cured semi-rigid sub-base material of the soil body.This patent pertains only to the soil body Solidification, the requirement for different soils do not illustrate, and intensity is not very prominent in semi-rigid sub-base material, fails It is related to the utilization of the Industrial Solid Wastes such as steel slag.
Xiao Qizhong et al. explanation in " expansion damage of steel slag and inhibition ", steel slag in temperature, air pressure is higher and has water Under conditions of, free calcium oxide and periclase therein meet water generation chemical reaction and are easy to happen expansion, generate the front volume of ratio Big compound, and by SiO2Equal siliceous materials, which are mixed to expand it in steel slag, a degree of control action, and into one Step makes steel slag intensity become larger.
Xu Guangliang et al. is in " the expansion and suppression of low alkalinity steel slag base oil well and the research-V steel slag of geothermal well cementitious material System " in point out SiO2List mixes in slag thin aggregate respectively for the higher siliceous material of content such as flyash, slag and quartz sand, It was found that siliceous material can effectively inhibit steel slag expansion, steel slag intensity is improved, the document does not have subsequent follow-up to study.
Liu Guangye is in " steel slag two-ash soil Study on unconfined compression strength " for the steel slag two that different addition quantity is made Dirt, respectively the different full water times, different numbers the operating conditions such as drying and watering cycle under carry out unconfined compression strength test, study Intensity and stability of the steel slag two-ash soil of different steel slag contents under various operating conditions.Test result shows compared to common two ash Soil, steel slag two-ash soil have unconfined compressive strength damage rate smaller, the preferable feature of stability.Steel slag used in the document is existing Good stability, ignoring expansion issues influences road construction, while its unconfined compressive strength is only up to 3MPa.
In recent years, iron and steel enterprise is constantly reformed in technique slagging tap, such as using hot bored, wind quenching, water quenching, although one Determine that part free calcium oxide in steel slag can be cleared up in degree, but limited by production cost, overall effect be not very well, still cannot be complete Complete solution is determined steel slag instability problem.Therefore, it is banked up using steel slag place, after several years ripening, resolution wherein dissociates naturally The method of f-CaO still generallys use at present for enterprise.
Summary of the invention
For these reasons, the present invention is directed to not aged steel slag stability poor, mixes complexing agent, utilizes its institute Containing silica composition, chemical reaction occurs with free calcium oxide in steel slag and forms resolution, utilizes white lime alkalinity in complexing agent Excite the potential gelling of steel slag；Simultaneously incorporating modified dose in normal soil, mixed and stirred.Pass through the processing respectively to slag, soil With puddle, it is high with intensity to make to be formed by steel slag composite soil, the pavement performances such as expansion rate is low, water stability is good, durability is good Superior new road base material.
The present invention provides a kind of novel steel slag composite soil road basement material, and the base material is by following parts by weight array Divide preparation: 0-15 parts of water, 40-80 parts of soil, 20-60 parts of steel slags, 5-25 parts of complexing agents, 1-5 parts of cement and 0.01-0.05 parts change Property agent.
Preferably, the soil organic matter content is no more than 5%, and the steel slag partial size is not more than 3.0cm, and the cement is Strength grade is not less than 32.5 ordinary portland cement.
Preferably, above-mentioned steel slag by without ripening the bored slag of heat, Water Quenching Slag, one of wind quenching slag or two kinds and Composition described above.
Preferably, the modifying agent is by strong oxidizer, high molecular reactive agent and stabilizer weight percent 10%- 50%:10%-50%:10%-50% mixed preparing forms, and the strong oxidizer is potassium permanganate and Na2Fe04 according to weight Than forming for 30%-50%:50%-70% mixed preparing, the sum of the potassium permanganate and ferric acid weight percent are 100%；The high molecular reactive agent is ion sulfated oil and higher aliphatic alcohol sulfuric ester according to 40%-60%:40%- 60%, the sum of the potassium permanganate and ferric acid weight percent are 100%；The stabilizer is polyacrylate, acetic acid second Enester and ethylene copolymer mixing composition, by weight ratio be 20%-50%:30%-50%:10%-60% mixed preparing and At the sum of the polyacrylate, vinylacetate and ethylene copolymer weight percent are 100%.
Preferably, the modifying agent optimal proportion is by strong oxidizer, high molecular reactive agent and stabilizer weight percent 33%:33%:34% mixed preparing forms.
Preferably, it is 40%:60% mixed preparing that the strong oxidizer, which is potassium permanganate and Na2Fe04 according to weight ratio, It forms, the ion sulfated oil and higher aliphatic sulfuric acid ester are formed according to weight ratio for 50%:50% mixed preparing, institute It is that 40%:25%:35% mixed preparing forms that polyacrylate, vinylacetate and ethylene copolymer, which are stated, according to weight ratio.
Preferably, the complexing agent is slag micropowder, white lime, flyash weight percent 40%-70%:5%- 20%:10%-55% mixed preparing forms, and the sum of the slag micropowder, white lime, flyash weight percent are 100%, institute Stating complexing agent each component material specific surface area is 300-500m2/kg。
Preferably, the complexing agent optimal proportion is slag micropowder, white lime, flyash weight percent 60%: 10%:30% mixed preparing forms.
Wherein, the preparation method of the novel steel slag composite soil road basement material includes the following steps:
1) compaction test is carried out after mixing steel slag, soil, cement, complexing agent, measures optimum moisture content；
2) steel slag without ripening is subjected to partial size screening, partial size is greater than 3.0cm and carries out break process；
3) each component is weighed according to parts by weight, and wherein steel slag partial size is not more than 3.0cm；
4) by the tap water of steel slag and complexing agent sprinkling total Water 50%, mixing is mixed, it is come into full contact with, obtains ground-slag Mixture；
5) it sprays 0.01-0.05 parts of modifying agent in the soil and mixes the tap water of residue 50%, mix uniform, changed Property soil；
6) by ground-slag mixture and Modified soil carry out it is secondary mix and stir, obtain dregs mixture；
7) 1-5 parts of labels are added in dregs mixture to be mixed and stirred, pressed three times not less than 32.5 ordinary portland cements It is real, make its moisture control in optimum moisture content ± 2%, finally obtains novel steel slag composite soil road basement material.
The invention has the benefit that
The present invention utilizes the high-content silica SiO of slag micropowder and flyash in complexing agent2With f-CaO in steel slag and Hydration reaction, reaction equation iCaO+mSiO occur for a small amount of water2+nH2O=iCaOmSiO2·nH2O generates aquation silicon Sour calcium gel iCaOmSiO2·nH2O, i.e. C-S-H；Wherein, mainly generating object is dicalcium silicate and tricalcium silicate, i.e. 2CaO SiO2·nH2O and 3CaOSiO2·nH2O, 2CaOSiO2·nH2O generates 3CaO under white lime promotes in complexing agent SiO2, 3CaOSiO2It can be reacted as follows with water: 3CaOSiO2+nH2O=xCaOSiO2·yH2O+(3-x)Ca (OH)2, generate silicate gel product, f-CaO and 3CaOSiO2The two meets water reaction and generates Ca (OH)2, the former aquation is anti- The Ca (OH) that should be generated2The outer surface that can adsorb and be piled up in remaining CaO particle, causes volume expansion；And the latter's hydration reaction While can generate and largely can effectively wrap up Ca (OH)2Hydrated calcium silicate gel object C-S-H therefore pass through suitable proportion Slag micropowder and flyash can substantially reduce in steel slag f-CaO hydration reaction and occur.The present invention is incorporating modified in the soil Agent changes soil particle surface electronic polarity, removes the adsorbed film of water of soil particle, reduces the repulsive force between soil particle, mentions Adsorption capacity between high soil particle makes soil be easy to be compacted and stablize, to form irreversible overall structure.By by ground-slag Mixture mixes mixing, compacting with modified soil, modified soil can be made more uniformly to wrap up steel slag, by by being modified The hydrophobicity of soil particle has obstructed coming into full contact with for steel slag and extraneous Free water, so that f-CaO hydration reaction be inhibited to occur. By above-mentioned multipath compound action, steel slag f-CaO hydration reaction generates Ca (OH) in steel slag composite soil2Lead to volume expansion Situation is effectively controlled, and inhibits steel slag expansion purpose to reach.
Detailed description of the invention
(each component material powdery mixes and stirs), rear f-CaO clear up XRD diagram before the processing of Fig. 1 steel slag composite soil；
Electron microscope after the processing of Fig. 2 steel slag composite soil；
Fig. 3 difference base material unconfined compressive strength；
Citation source in Fig. 4 specification background technique.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with implementation of the invention Example, technical scheme in the embodiment of the invention is clearly and completely described.Based on the embodiments of the present invention, this field Those of ordinary skill's every other embodiment obtained without creative efforts, belongs to protection of the present invention Range.
Embodiment 1
50 parts of steel slags, 50 parts of soil, 3 parts of cement, 40 parts of complexing agents and 0.02 part of modifying agent are chosen, is made according to the following steps Standby novel steel slag composite soil road basement material:
1) compaction test is carried out after mixing steel slag, soil, cement, complexing agent, measures optimum moisture content；
2) steel slag without ripening is subjected to partial size screening, partial size is greater than 3.0cm and carries out break process；
3) each component is weighed according to parts by weight, and wherein steel slag partial size is not more than 3.0cm；
4) by the tap water of steel slag and complexing agent sprinkling total Water 50%, mixing is mixed, it is come into full contact with, obtains ground-slag Mixture；
5) in the soil spraying modified dose and mix residue 50% tap water, obtain Modified soil；
6) by ground-slag mixture and Modified soil carry out it is secondary mix and stir, obtain dregs mixture；
7) 1-5 parts of labels are added in dregs mixture to be mixed and stirred, pressed three times not less than 32.5 ordinary portland cements It is real, make its moisture control in optimum moisture content ± 2%, finally obtains novel steel slag composite soil road basement material.
Weigh 50 parts of steel slags, 50 parts of soil, 3 parts of cement and 40 parts of complexing agents respectively, 50 parts of steel slags, 50 parts of soil, 3 parts of cement with And 0.02 part of modifying agent and 50 parts of steel slags, 50 parts of soil and 3 parts of cement, it is prepared, is obtained according to the preparation method in embodiment 1 Comparative example 1, comparative example 2 and comparative example 3, measure 10 days expansion rates of embodiment 1 and comparative example 1,2,3,7 days compression strength and The steady coefficient of water is as shown in table 1.Steel slag and soil mixing mixing processing before (each component material powdery mixes and stirs), after XRD spectrum result As shown in Fig. 1 in Figure of description；Steel slag and soil mixing mixing treated electron microscope result such as Fig. 2 institute in Figure of description Show.
1 test result of table contrasts table
As shown in Table 1, complexing agent and modifying agent can reduce by 10 days expansion rates of steel slag composite soil to some extent, improve steel 7 days compression strength of slag composite soil and the steady coefficient of water；But the two, when being used in mixed way, 10 days expansion rates are only the 5% of comparative example 3, And comparative example 1 is the 67.8% of comparative example 3, comparative example 2 is the 82.8% of comparative example 3, so complexing agent and modifying agent make simultaneously With being much higher than the additive effect of single component to the reduction degree of 10 days expansion rates；
When the two is used in mixed way, 7 days compression strength is compared to comparative example 3 and improves 313.7%, and comparative example 1 is compared 96.4% is improved in comparative example 3, comparative example 2 improves 49.6% compared to comparative example 3, so complexing agent and modifying agent are simultaneously It uses, the additive effect of single component is much higher than to the raising degree of 7 days compression strength；
When the two is used in mixed way, the steady coefficient of water is compared to comparative example 3 and improves 52.4%, and comparative example 1 is compared to right Ratio 3 improves 23%, and comparative example 2 improves 3.3% compared to comparative example 3, so complexing agent and modifying agent use simultaneously, The raising degree of the water coefficient of stability is higher than the additive effect of single component.
Embodiment 2
40 parts of steel slags, 60 parts of soil, 3 parts of cement, 40 parts of complexing agents and 0.020 part of modifying agent are chosen, according to the following steps Prepare novel steel slag composite soil road basement material:
1) compaction test is carried out after mixing steel slag, soil, cement, complexing agent, measures optimum moisture content；
2) steel slag without ripening is subjected to partial size screening, partial size is greater than 3.0cm and carries out break process；
3) each component is weighed according to parts by weight, and wherein steel slag partial size is not more than 3.0cm；
4) by the tap water of steel slag and complexing agent sprinkling total Water 50%, mixing is mixed, it is come into full contact with, obtains ground-slag Mixture；
5) in the soil spraying modified dose and mix residue 50% tap water, obtain Modified soil；
6) by ground-slag mixture and Modified soil carry out it is secondary mix and stir, obtain dregs mixture；
7) 1-5 parts of labels are added in dregs mixture to be mixed and stirred, pressed three times not less than 32.5 ordinary portland cements It is real, make its moisture control in optimum moisture content ± 2%, finally obtains novel steel slag composite soil road basement material.
By embodiment 2 prepare steel slag composite soil according to code requirement be made test expansion rate test specimen, test obtain its 60 Its expansion rate is 0.13%.
40 parts of steel slags, 60 parts of soil, 3 parts of cement, 30 parts of complexing agents, 0.020 part of modifying agent are weighed respectively；40 parts of steel slags, 60 Part soil, 3 parts of cement, 20 parts of complexing agents, 0.020 part of modifying agent；40 parts of steel slags, 60 parts of soil, 3 parts of cement, 0.020 part of modifying agent. It is prepared according to the preparation method in embodiment 2, obtains comparative example 1, comparative example 2 and comparative example 3, measure embodiment 2, comparison Final expansion rate is as shown in table 2 behind 60 days of example 1,2,3.
2 test result of table contrasts table
As shown in Table 2, when complexing agent additive amount is 20 parts, 30 parts, 40 parts, 60d expansion rate is followed successively by 0.28%, 0.22%, 0.13%, compared to complexing agent is not added with, decline degree is above 90%.It can be seen that different addition quantity is compound Agent influences significantly on steel slag composite soil 60d expansion rate is reduced.
Embodiment 3
50 parts of steel slags, 50 parts of soil, 3 parts of cement, 30 parts of complexing agents and 0.02 part of modifying agent are chosen, is made according to the following steps Standby novel steel slag composite soil road basement material:
1) compaction test is carried out after mixing steel slag, soil, cement, complexing agent, measures optimum moisture content；
2) steel slag without ripening is subjected to partial size screening, partial size is greater than 3.0cm and carries out break process；
3) each component is weighed according to parts by weight, and wherein steel slag partial size is not more than 3.0cm；
4) by the tap water of steel slag and complexing agent sprinkling total Water 50%, mixing is mixed, it is come into full contact with, obtains ground-slag Mixture；
5) in the soil spraying modified dose and mix residue 50% tap water, obtain Modified soil；
6) by ground-slag mixture and Modified soil carry out it is secondary mix and stir, obtain dregs mixture；
7) 1-5 parts of labels are added in dregs mixture to be mixed and stirred, pressed three times not less than 32.5 ordinary portland cements It is real, make its moisture control in optimum moisture content ± 2%, finally obtains novel steel slag composite soil road basement material.
By steel slag composite soil that embodiment 3 is prepared carry out after 7 days standard curing phases respectively by a definite date 1,3,7,14, 28, submerging test in 60 days, it is as shown in table 3 for measuring its intensity and the steady coefficient of water.
Influence of 3 soaking time of table to compression strength and the steady coefficient of water
Embodiment 4
50 parts of steel slags, 50 parts of soil, 3 parts of cement, 40 parts of complexing agents and 0.02 part of modifying agent are chosen, according in embodiment 1 It is prepared by preparation method.In optimum moisture content, after carrying out standard curing in 3,7,14,28,60 and 90 days by a definite date, survey It is as shown in table 4 to obtain its unconfined compressive strength, it is as shown in Table 4, right when the standard curing period is 3,7,14,28,60,90 days The compression strength answered is respectively 3.58MPa, 5.69MPa, 8.89MPa, 12.65MPa, 17.81MPa and 26.56MPa, corresponding water Steady coefficient is respectively 85%, 90%, 92%, 93%, 95% and 97%.By the present embodiment products obtained therefrom and two-ash soil, two sand-limes Gravel, two-ash broken stones, cement gravel, solidified earth unconfined compressive strength compare, as shown in Fig. 3 in Figure of description.By Fig. 3 It is found that road basement material compression strength provided by the invention is higher, so performance is more excellent.
Influence of the 4 standard curing period of table to compression strength and the steady coefficient of water
Embodiment 5
50 parts of steel slags, 50 parts of soil, 3 parts of cement, 40 parts of complexing agents and 0.02 part of modifying agent are chosen, in optimum moisture content feelings Under condition, when compactness is respectively 92%, 94%, 96%, 98% and 100%, the standard curing carried out 7 days by a definite date measures it without side Limiting compression strength is 3.28Mpa, 4.08Mpa, 5.03Mpa, 5.78MPa and 7.15Mpa, the steady coefficient of water is respectively 84%, 86%, 89%, 92% and 96%, as shown in table 5.
Influence of 5 compactness of table to compression strength and the steady coefficient of water
Steel slag Soil Cement Complexing agent Modifying agent Compactness 7 days compression strength The steady coefficient of water
50 parts 50 parts 3 parts 40 parts 0.02 part 92% 3.28Mpa 84%
50 parts 50 parts 3 parts 40 parts 0.02 part 94% 4.08Mpa 86%
50 parts 50 parts 3 parts 40 parts 0.02 part 96% 5.03Mpa 89%
50 parts 50 parts 3 parts 40 parts 0.02 part 98% 5.78Mpa 92%
50 parts 50 parts 3 parts 40 parts 0.02 part 100% 7.15Mpa 96%
Embodiment 6
50 parts of steel slags, 50 parts of soil, 4 parts of cement, 40 parts of complexing agents and 0.02 part of modifying agent are chosen, according in embodiment 1 Preparation method preparation, obtains embodiment 6, in optimum moisture content, the standard curing carried out 7 days by a definite date measures it without lateral confinement Compression strength is 6.03MPa, and the steady coefficient of water is 93%.Choose 50 parts of steel slags again, 50 parts of soil, 4 parts of cement, 0.02 part of modifying agent, Complexing agent selects 20 parts, 30 parts, 50 parts, 60 parts respectively, as a comparison case according to the preparation method preparation in embodiment 1, most In the case of good moisture content, the standard curing carried out 7 days by a definite date measures its unconfined compressive strength and the steady coefficient of water, as a result such as table 6 It is shown.
Influence of the 6 complexing agent additive amount of table to compression strength and the steady coefficient of water
Embodiment 7
50 parts of steel slags, 50 parts of soil, 5 parts of cement, 40 parts of complexing agents and 0.02 part of modifying agent are chosen, according in embodiment 1 Preparation method prepared, obtain embodiment 7, in optimum moisture content, carry out standard curing in 7 days by a definite date and measure it Unconfined compressive strength is 7.03MPa, and the steady coefficient of water is 93%.Again respectively weigh 60 parts of steel slags, 40 parts of soil, 5 parts of cement, 40 parts Complexing agent, 0.02 part of modifying agent；40 parts of steel slags, 60 parts of soil, 5 parts of cement, 40 parts of complexing agents, 0.02 part of modifying agent；30 parts of steel slags, 70 parts of soil, 5 parts of cement, 40 parts of complexing agents, 0.02 part of modifying agent；20 parts of steel slags, 80 parts of soil, 5 parts of cement, 40 parts of complexing agents, 0.02 part of modifying agent.It is prepared according to the preparation method in embodiment 1, as a comparison case.In optimum moisture content, into Standard curing in the behavior phase 7 days measures the unconfined compressive strength and the steady coefficient of water of embodiment 7 and comparative example, as shown in table 7.
Influence of the 7 dregs ratio of table to compression strength and the steady coefficient of water
Steel slag Soil Cement Complexing agent Modifying agent 7 days compression strength The steady coefficient of water
60 parts 40 parts 5 parts 40 parts 0.02 part 5.48MPa 90%
40 parts 60 parts 5 parts 40 parts 0.02 part 6.38MPa 93%
30 parts 70 parts 5 parts 40 parts 0.02 part 4.46MPa 93%
20 parts 80 parts 5 parts 40 parts 0.02 part 3.68MPa 95%
Description of test
1, steel slag composite soil optimum moisture content test method
It samples and carries out the week drying by a definite date of 50 degree of baking ovens, and dregs mixture one night of progress that will mix mixing formation boils in a covered pot over a slow fire Material, be added within cement two hours before hitting reality and it is secondary mix and stir after, carry out compaction test, measure its optimum moisture content ω and best dry Density pd, to determine the water of follow-up test addition.
2, steel slag composite soil cubical expansivity test method
It takes partial size to be less than 3cm, and grain composition meets code requirement, is chosen according to above-mentioned material specific gravity section, it will be above-mentioned Material is mixed and stirred, and heavy II -2 type is selected to hit real method 15.2cm*17cm standard impact density examination bucket.After specimen molding, standard After curing box maintenance regulation age (20 ± 2 DEG C of temperature, humidity 95%), carries out after taking-up according to this step: (1) being filled in die trial Enter cushion block, spread filter paper, carry out heavy compaction molding, remove sleeve after the completion of hitting in fact, scrape extra steel slag with ruler scraper, uses The levelling surface of test piece of fines polishing, spreads filter paper, covers porous pedestal.Die trial is inverted together with porous pedestal, takes pad away Block.Upper filter paper is padded again, and the porous top plate of dress soil is cleaned outside die trial.(2) at 4 pieces of semicircle Loading Plates in porous item version, altogether Weight 5kg.The indicator bracket and dial gauge of the immersion expansion rate of device measurement thereon.Dial gauge should be accurately aimed at center contact and protect Hold vertical state.(3) die trial is put into constant temperature water bath, die trial is answered in whole immersion waters.The first reading of dial gauge is read immediately Number d0, it is accurate to 0.01mm.(4) heating water bath, temperature keeps 6h after reaching (90+3) DEG C in water bath, stops heating, natural It is cooling, later daily by the 1st day the step of carry out, and record percentage meter reading before daily heating, so persistently carry out 10d. (5) dial gauge end readout d is read after 10d10, the immersion expansion rate of steel slag is calculated as follows:
In formula: the immersion expansion rate of γ mono-, %；
120- test specimen original height, unit mm；
d10The end readout of dial gauge, mm；
d0The initial reading of dial gauge, mm.
3, unconfined compression strength test method
According to above-mentioned to being chosen in material proportion range intervals, using 50mm*50mm cylindrical body die trial.Test is needed with soil Ball mill corase grinding is carried out, 0.5mm standard screen is crossed, test steels slag should also be roughly ground by ball mill, or be screened by screening machine, Cross 1mm standard screen (specification there are Particle size requirements to this 50mm*50mm test specimen, need to be less than 1mm or less)；It should be by water, modification in test Agent and micro-powder as additive are uniformly sprayed on the steel slag mixing soil body, and carry out 12 hours stewing material；After stewing material, test block is being carried out Make first 2 hours addition cement mixing again.Every group of match ratio is needed to make 6 test specimens using reaction frame and ingot stripper Carry out unconfined compression strength test, test requirements document is as follows: 20 ± 2 DEG C of standard curing box curing temperature, humidity 95% conserves, and supports On the day before shield to regulation age, carries out immersion and water level should not have test specimen top 2.5cm, should be taken out immediately after the end cycle that soaks Surface residual Free water is wiped, unconfined compression strength test is carried out using standard ground surface material test pressure machine.Test block weight Selection should be chosen according to compactness K, calculation formula is as follows:
In formula: K- compactness, %； ρdPractical test specimen dry density, g/cm3；
ρdPractical test specimen dry density, g/cm3； ρωSample density, g/cm3；
Standard dry density, g/cm3.ω-test specimen moisture content.
The weight that each test specimen counter can be released according to above-mentioned two formula, is accurate to 0.1g.
4, water stability testing method
Test specimen is matched using two groups of same markers under feeding are same, first group is taken out after completing predetermined curing time, is soaked immediately Water is tested after reaching predetermined immersion number of days；Second group is taken out after completing predetermined curing time, is tested immediately.It will test Data are compared, it can be deduced that intensity percent is the steady coefficient gamma of waterw, calculation formula is as follows:
In formula: γwThe steady coefficient of water, %；
RWThe unconfined compressive strength of the test specimen after predetermined number of days is impregnated in water；
R0Without the unconfined compressive strength of the test specimen impregnated in water.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.

Claims (9)

1. a kind of novel steel slag composite soil road basement material, which is characterized in that the base material is by following parts by weight array Divide preparation: 0-15 parts of water, 40-80 parts of soil, 20-60 parts of steel slags, 5-25 parts of complexing agents, 1-5 parts of cement and 0.01-0.05 parts change Property agent.
2. novel steel slag composite soil road basement material according to claim 1, which is characterized in that the soil organism Content is no more than 5%, and the steel slag partial size is not more than 3.0cm, and the cement is the common silicic acid that strength grade is not less than 32.5 Salt cement.
3. novel steel slag composite soil road basement material according to claim 1, which is characterized in that the steel slag by without One of the bored slag of heat of ripening, Water Quenching Slag, wind quenching slag or two kinds and composition described above.
4. novel steel slag composite soil road basement material according to claim 1, which is characterized in that the modifying agent is by strong Oxidant, high molecular reactive agent and stabilizer weight percent 10%-50%:10%-50%:10%-50% mixed preparing It forms, it is 30%-50%:50%-70% mixed preparing that the strong oxidizer, which is potassium permanganate and Na2Fe04 according to weight ratio, It forms, the sum of the potassium permanganate and ferric acid weight percent are 100%；The high molecular reactive agent is ion sulfated oil With higher aliphatic alcohol sulfuric ester according to 40%-60%:40%-60%, the sum of the potassium permanganate and ferric acid weight percent It is 100%；The stabilizer is polyacrylate, vinylacetate and ethylene copolymer mixing composition, and ratio is by weight 20%-50%:30%-50%:10%-60% mixed preparing forms, the polyacrylate, vinylacetate and ethylene copolymer The sum of object weight percent is 100%.
5. novel steel slag composite soil road basement material according to claim 1, which is characterized in that the modifying agent is optimal Proportion is formed by strong oxidizer, high molecular reactive agent and stabilizer weight percent 33%:33%:34% mixed preparing.
6. novel steel slag composite soil road basement material according to claim 1, which is characterized in that the strong oxidizer is Potassium permanganate and Na2Fe04 are formed according to weight ratio for 40%:60% mixed preparing, the ion sulfated oil and advanced rouge Fat alcohol sulfuric ester class is that 50%:50% mixed preparing forms according to weight ratio, the polyacrylate, vinylacetate and ethylene Copolymer is that 40%:25%:35% mixed preparing forms according to weight ratio.
7. novel steel slag composite soil road basement material according to claim 1, which is characterized in that the complexing agent is mine Slag micro mist, white lime, flyash weight percent 40%-70%:5%-20%:10%-55% mixed preparing form, described The sum of slag micropowder, white lime, flyash weight percent are 100%, and the complexing agent each component material specific surface area is 300-500m2/kg。
8. novel steel slag composite soil road basement material according to claim 1, which is characterized in that the complexing agent is optimal Proportion is slag micropowder, white lime, flyash weight percent 60%:10%:30% mixed preparing form.
9. the preparation method of novel steel slag composite soil road basement material according to claim 1, which is characterized in that described Preparation method includes the following steps:
1) compaction test is carried out after mixing steel slag, soil, cement, complexing agent, measures optimum moisture content；
2) steel slag without ripening is subjected to partial size screening, partial size is greater than 3.0cm and carries out break process；
3) each component is weighed according to parts by weight, and wherein steel slag partial size is not more than 3.0cm；
4) by the tap water of steel slag and complexing agent sprinkling total Water 50%, mixing is mixed, it is come into full contact with, obtain ground-slag mixing Material；
5) it sprays 0.01-0.05 parts of modifying agent in the soil and mixes the tap water of residue 50%, mix uniform, be modified Soil；
6) by ground-slag mixture and Modified soil carry out it is secondary mix and stir, obtain dregs mixture；
7) 1-5 parts of labels are added in dregs mixture to be mixed and stirred, be compacted three times not less than 32.5 ordinary portland cements, make Its moisture control finally obtains novel steel slag composite soil road basement material in optimum moisture content ± 2%.
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