CN110407528A - A kind of mixing cured soil body road basement material of steel slag - Google Patents
A kind of mixing cured soil body road basement material of steel slag Download PDFInfo
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- CN110407528A CN110407528A CN201810391091.4A CN201810391091A CN110407528A CN 110407528 A CN110407528 A CN 110407528A CN 201810391091 A CN201810391091 A CN 201810391091A CN 110407528 A CN110407528 A CN 110407528A
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/00482—Coating or impregnation 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
- 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
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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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Road Paving Structures (AREA)
Abstract
The invention belongs to construction material and field of solid waste disposal, it is related to using the mixing cured soil body road basement material of steel slag as road basement material.The configuration ratio of the mixing cured soil body road basement material of the steel slag is as follows: being based on material total weight, 50-70 parts of soil, 30-50 parts of steel slags, 30-50 parts of micro-powder as additive, 3-5 parts of portland cements, 0.015-0.020 parts of modifying agent.The steel slag composite soil foundation base intension rationally prepared reaches 7MPa, includes cement stabilized macadam intensity much higher than traditional road base soil intensity, and has early powerful feature, and 7 days early stages unconfined compressive strength is up to the 70-80% of final strength；And steel slag expansion rate is less than 2% as defined in specification；It can apply and make all kinds of highways, roadbase filler.
Description
Technical field
The invention belongs to construction material and field of solid waste disposal, and in particular to a kind of mixing cured soil body roadbase of steel slag
Material.
Background technique
Steel slag has become ubiquitous for road construction in foreign countries as roadbed filling and road surface base layer material, but in reality
In, steel slag expansion is to hinder an important factor for steel slag is as roadbed filling large-scale application.If steel slag expansion obtains
It is effective to inhibit and clear up, it will to bring being widely applied for steel slag application.There are many factor for influencing steel slag stability, are included in
Lime, dolomite, high magnesium material is added for imurity-removal in steelmaking process and makees slag former, wherein the free calcium oxide generated
Its volume stability is influenced with free magnesium.
Since the slag former slag making being added when China smelts steel is insufficient, the f-CaO content in steel slag is higher, without heap
Put ageing or other any processing modes converter slag free CaO content it is usual > 20 parts, open hearth steel slag generally at 10-20 parts,
It handles by hot application usually at 1-6 parts.Resolution in steel slag is to lead to the greatest problem of steel slag expansion, and aquation generates after meeting water
Ca(OH)2, volume increase twice, generate biggish swelling stress, particle expansion dusting and sub-surface caused to crack very
To the quality problems of top packet.The Ca (OH) that silicate mineral aquation generates2Wrapping with a large amount of C-S-H gel together will not shape
At destruction, and the Ca (OH) that f-CaO aquation generates2It is then deposited in the surface of CaO particle, further reduced the aquation of f-CaO
Rate, so that generating volumetric fracture of rock effect in the later period.It is asked so being expanded existing for the later period using the steel slag in highway engineering
Topic, is the greatest problem for being easy to cause section unstable quality.
Nowadays ageing method is still stacked to the most common processing method of steel slag expansion problem, is allowed wherein by placing
F-CaO resolution so that using after steel slag volume is stable for road construction, this process needs 1 to two year time.So
And the steel slag accumulating amount in China has reached about 400,000,000 tons at present.While wasting land resource, untreated heap abandons meeting pair
Ambient enviroment causes a degree of harm.So such solution efficiency is very low, and causes greatly to destroy to ecology.
It is disclosed in Chinese invention patent application prospectus CN106968237A a kind of cured partly using the soil body
Rigid base's material is mainly made of the raw material of following mass parts: 80-95 parts of the soil body, 4-10 parts of cement, soil-solidified-agent
0.01-0.05 parts, 0-15 parts of water.Semi-rigid sub-base material prepared by the present invention is high with intensity, water stability is good, durability is good,
Strong, the at low cost advantage of frost resistance, while largely having used the soil body, realizes the recycling high value added utilization of the soil body, can be with
Cement and lime rubble layer material is effectively replaced, resources and energy consumption and environmental pollution are reduced, there is significant economy and society effect
Benefit.This patent has related only to the solidification of the soil body, and the requirement for different soils does not illustrate, and intensity is in semi-rigid
It is very not prominent in property base material, and fail to be related to the utilization of the Industrial Solid Wastes such as steel slag.
It is disclosed in Chinese invention patent application prospectus CN101343852A and a kind of fills public affairs using steel slag
The method of road roadbed the steps include: that (1) is filling roadbed using steel slag；(2) the filling roadbed fill core concrete of steel slag need to be controlled,
Guarantee the stability of roadbed: (3) steel slag railway embankment should use vibrated roller layered rolling, and steel slag should be at most preferably when rolling
In water content ranges, equipment suitably is rolled using the method determination of test section test, using maximum dry density with most preferably contain
The water compactness filling roadbed as steel slag calculates standard: the cross-sectional design of (4) steel slag filled-up road embankment, including depth of fill, road
Dike slope gradient fills thickness, closedtop layer, underseal layer, interlayer, slope protection and drainage system.The method of the present invention is easy, operation side
Just, reduce stacking place and the environmental pollution of steel slag, it is at low cost, turn waste into wealth, promote environmental protection, solves highway work
Journey filler deficiency problem.The quality of its roadbed filled out can satisfy the construction requirement of High-Grade Highway Subgrade.Patent text
The explanation mainly for it for steel slag roadbed filling process is offered, and there is no created from the use of raw material
It newly, is all the utilization of steel slag solid waste, what this patent document was related to is only filling for road foundation part.And it is built in road
If in, the building requirements intensity intensity to be achieved of roadbed part will be far below road basement material, and therefore, which is mentioned
The method of confession is not suitable for the manufacture of road basement material.
It is disclosed in Chinese invention patent application prospectus CN104278609A by the way that dregs is compound with steel slag
The road pavements and its method of preparation, the total weight based on the road pavements, the road pavements include
The dregs of micro mist, 40-70 weight % 1-15 weight % active as made from steel slag, the steel slag of 15-30 weight % and
The exciting agent of 0.02-0.06 weight %.This road pavements keeps dregs and steel slag equal while meeting road index request
It is fully used.The patent document is more low on for utilization rate of steel slag, and has for the specification of steel slag stringent
Particle size requirement, has not focused on and is solved on to expansion issues, thus its stability have it is considered, and for conduct
It is not referred in road filling performance indexes such as unconfined compressive strength, water stability too much, therefore is only suitable for using
It requires and requires lower in road foundation filler.
A kind of stewing steel slag building masonry of heat is disclosed in Chinese invention patent application prospectus CN102674781A
Dry powder and preparation method, the heat boil in a covered pot over a slow fire steel slag and build masonry dry powder, and percentage boils in a covered pot over a slow fire steel slag, 10- by the heat of 70-85%
25% slag micropowder, the flyash of 5-10%, the bentonite of 0-5% and 0-5% additive is composed.This method step packet
It includes: the stewing steel slag of heat being dried first, is broken into sand shape；Then industrial slag dried, be finely ground to micro mist shape, it is micro- that slag is made
Powder: last weight percent boils in a covered pot over a slow fire steel slag, the slag micropowder of 10-30%, the flyash of 5-10%, 0-5% by the heat of 70-85%
Bentonite and 0-5% additive, be mixed evenly.The present invention takes full advantage of iron and steel enterprise's steel slag, slag, change give up into
Treasured, energy saving, production cost is low, good product quality, improves the processing and disposal efficiency of steel enterprise waste residue, has higher economic valence
Value and the value of environmental protection.The patent document needs to have carried out working process to it when selecting process for steel slag, does so in reality
The investment for needing to be added equipment in the application process of border increases economic cost, and it is developed and application is limited to building and builds.
Non-patent literature, Xiao Qizhong " expansion damage of steel slag and inhibition " Xiao Qizhong, silicate journal, 1996 volume 24
6th phase, document explanation, steel slag is in temperature, air pressure is higher and under conditions of having water, free calcium oxide and periclase therein
Meeting water chemical reaction occurring can expand, and generate the bulky compound than before, and by SiO2Equal siliceous materials are mixed in steel
Can expand to it in slag has a degree of control action, and steel slag intensity is further made to become larger.The document time is more early, for
The method of measurement expansion is not shown in detail.
Non-patent literature, " expansion and inhibition of low alkalinity steel slag base oil well and the research-V steel slag of geothermal well cementitious material "
Xu Guangliang etc., Xinan Polytechnical College's journal, the 4th phase in 2001, the document are found SiO2The higher siliceous material of content such as fine coal
Respectively in single incorporation slag thin aggregate, discovery siliceous material can effectively inhibit steel slag expansion for ash, slag and quartz sand, improve steel slag
Intensity.The document does not have subsequent follow-up to study.
Summary of the invention
To solve using the mixing cured soil body of steel slag as expansion issues existing when road basement material and Road Base
Layer material performance deficiency, high production cost, treatment process not environmentally the problem of, the present invention provides a kind of mixing cured soil of steel slag
Body road basement material.
The mixing cured soil body road basement material of steel slag, ingredient are as follows: 50-70 parts of soil, 30-50 parts of steel slags, 30-50 parts
Micro-powder as additive, 3-5 part portland cement, 0.015-0.020 parts of modifying agent.
Further, element soil specific gravity is not less than 70% in the soil, and silt soil need to carry out after air-drying through processing as soil
Earth uses.
Further, the partial size of the steel slag is no more than 3cm.
Further, the micro-powder as additive includes flyash, blast-furnace cinder micro-powder, silicon ash and/or other industrial residues
Micro mist.
Further, the label of the portland cement is not less than 32.5, and does not include early strength agent.
Further, the modifying agent is by strong oxidizer, ionic macromolecule activator, dispersing agent, curing catalysts
Composition.
In heretofore described modifying agent, strong oxidizer contains high valence ion, can displace K+, Na+ of soil middle or low price
Ion is beneficial to coming into full contact between grogs to change the double electrical layers on grogs surface.Ionic macromolecule activator is not
It is only capable of forming stable space net structure, and its water-wet side is adsorbed in grogs surface, hydrophobic end prevents water towards external environment
Divide the destruction to structural formation, increases long-time stability；Dispersing agent does not lose by both of the above in the case where that can coexist again
Respective activity.Curing catalysts keep its compatible and anti-rapidly when with the curing materials collective effect such as cement, lime
It answers, realizes and have complementary advantages, improve solidification effect.Different proportion need to be carried out for different regions soil when this modifying agent use to match
System, to obtain best use effect.It needs to carry out the dilution of 1:200 pure water when in use.Can be used existing stirring technique it is extensive,
Low cost production.
The steel slag composite soil foundation base intension that the present invention is rationally prepared reaches 7MPa, includes higher than traditional road base soil intensity
Cement stabilized macadam intensity, and there is early powerful feature, 7 days early stages unconfined compressive strength reaches the 70-80% of final strength；And
Steel slag expansion rate is less than 2% as defined in specification；It can be applied to whole highways (road) base filler, 7 days nothings under rational proportion
Confined compressive strength reaches 3MPa or more, and 90 DEG C of high temperature bath excitations conserve 10 days cubical expansivities and are less than as defined in national regulation
2%.
This invention also solves steel slag volume stability problems, by steel slag and slag micropowder, flyash, silicon ash activity micro mist
Mix mixing, the Ca dissolved out in steel slag2+It has stimulated the SiO in steel slag gap3 2-Following reaction occurs for micro mist, discharge:
iCa2++mSiO3 2-+nOH-=iCaOmSiO2·nH2O
Reaction generates iCaOmSiO2·nH2O (C-S-H), a large amount of C-S-H gel and Ca (OH)2It is bundled together, and
The Ca (OH) that f-CaO aquation generates2It is then deposited in the surface of CaO particle, the further progress of reaction is hindered, reduces f-
The hydration rate of CaO, to solve the problems, such as steel slag expansion.
Preparation method of the invention is also optimized the stability of product and intensity, avoids steel slag in roadbed material
In expansion issues.Temperature is higher than cement kiln firing temperature when due to steel-making, the silicate mineral crystal tool of chilling in steel slag
There are higher physics potential and chemical reactivity, can be used as the non-clinker crystal seed with " induction crystallization " function, while activity
Micro mist can excite potential gelling in steel slag, and a series of jel products of produced silicate can be further improved globality and strong
Degree, so main mineral constituent is similar to clinker in steel slag.Modifying agent is added during mixing and stirring with soil, is being added
After 0.018-0.020 parts of modifying agent, by mixing mixing compacting with steel slag, by the Free water in soil with netted crystalline form
It is fixed up.It is interspersed between soil particle gap and forms strength bone, change soil particle surface electronic polarity, remove soil
The adsorbed film of water of grain reduces the repulsive force between soil particle, improves the adsorption capacity between soil particle, and soil is made to be easy to be compacted and steady
It is fixed.To form irreversible overall structure, the comprehensive load-carrying properties for improving the soil body and anti-splitting parameter, and reach traditional handicraft
The inaccessiable compactness of institute, water stability, impermeability and hydrophobicity.Steel slag and roadbase road surface water are further obstructed
Contact, to guarantee its stability and intensity.Thus the mixing cured soil body material of the steel slag prepared is from physics, chemically and physically
The triple means of chemistry solve the problems, such as that the material is expansile, avoid expansion issues of the steel slag in roadbed material.
The present invention solves expansion issues of the steel slag composite soil as road filler；The mixing cured soil material of the steel slag of preparation
7MPa is reached as roadbase intensity, includes cement stabilized macadam intensity higher than traditional road base soil intensity, and is had early strong
Characteristic.It is good to have obtained a kind of high mechanical properties, water stabilizing, has met pavement performance soil test code requirement, economic indicator
The mixing cured dirt road road filler of more spike steel slags of relative moderate.
In terms of environmental protection, the present invention passes through promotion high-performance, the reality of inexpensive steel slag composite soil roadbed filling
Using, it can both solve the comprehensive of steel slag and use, realization solid waste resource comprehensiveization utilization；Simultaneously again can local use, solve soil
The problem that square outlet is difficult, transportation cost is high.
Specific embodiment
The present invention is further described by specific embodiment.
The mixing cured soil body road basement material of steel slag of the invention, it is necessary first to which expansion rate detection and nothing are carried out to product
Confined compressive strength proves experiment, and 50mm*50mm cylindrical body die trial system is used when detecting to unconfined compressive strength in test
Mould, according to road steel slag code requirement when detecting steel slag expansion, steel slag particle diameter is less than 3cm, and meets code requirement
Grain composition.
Moisture content detection is carried out to on-site soil, sampling dry within 50 degree of baking ovens 7 days by a definite date, and mixing mixing is formed
Steel slag composite soil.Within the scope of specific value is according to material proportion described in technical solution file preparation process, it is not added at this time
Enter modifying agent, carry out a night stewing material, be added within cement two hours before hitting reality it is secondary mix and stir, carry out compaction test.It is best to measure it
Moisture content ω and optimum dry density ρd, convenient for the addition of the specific water of follow-up test.Test is referring to " highway earthwork test rule
JTGE40-2007 ", select heavy II -2 type to hit real method according to specification regulation.
The test of steel slag cubical expansivity is carried out according to above-mentioned measured optimum moisture content, according to " steel slag Detection of Stability side
Method GB24175-2009 " it requires, take partial size to be less than 3cm, and grain composition meets code requirement, according to above-mentioned material specific gravity section
It chooses.If optimum moisture content has been more than to use water after modified dilution agent, remaining water is first sprayed, after by the modification after dilution
Agent carries out sprinkling and mixes and stirs.Above-mentioned material is mixed and stirred, referring to " highway earthwork test rule JTGE40-2007 ", according to specification
Regulation selects heavy II -2 type to hit real method 15.2cm*17cm standard impact density examination bucket.After specimen molding, standard curing box maintenance
7 days, condition was 20+2 DEG C of temperature, and humidity 95% carries out according to this step after taking-up: (1) being packed into cushion block in die trial, spread filter
Paper carries out heavy compaction molding according to the compaction test method in GB/T50128, removes sleeve after the completion of hitting in fact, scraped with ruler
Knife scrapes extra steel slag, with the levelling surface of test piece of fines polishing, spreads filter paper, covers porous pedestal.By die trial together with porous bottom
Seat is inverted together, takes cushion block away.Upper filter paper is padded again, and the porous top plate of dress soil is cleaned outside die trial.(2) at 4 in porous item version
Block semicircle Loading Plate weighs 5kg altogether.The indicator bracket and dial gauge of the immersion expansion rate of device measurement thereon.Dial gauge is accurate
Alignment center contact simultaneously keeps vertical state.(3) die trial is put into constant temperature water bath, in die trial whole immersion water.It reads immediately
The initial reading d0 for taking dial gauge, is accurate to 0.01mm.(4) heating water bath, temperature is kept after reaching (90 ± 3) DEG C in water bath
6h, stops heating, natural 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 d10 is read after 10d, the immersion expansion rate of steel slag is calculated by formula (1):
In formula: the immersion expansion rate of γ mono-, %；
120 1 test specimen original heights, mm；
d10The end readout of one dial gauge, mm；
d0The initial reading of one dial gauge, mm.
Unconfined compression strength test is being carried out, according to above-mentioned to choosing in material proportion range intervals, according to " highway
Engineered inorganic binder stabilizing material testing regulations JTGE51-2009 " it requires, using 50mm*50mm cylindrical body die trial.Test
Ball mill corase grinding is carried out with soil, crosses 0.6mm standard screen, test steels slag also passes through ball mill corase grinding, or passes through sifted
1mm standard screen is crossed in choosing, and specification has Particle size requirements to this 50mm*50mm test specimen, is less than 1mm or less.By water, modifying agent in test
And micro-powder as additive is uniformly sprayed on steel slag mixture, and carrying out 12 hours stewing material comes into full contact with it, in the test block system of progress
Make first 2 hours addition cement mixing again, test block production can be carried out, test can be made to reach optimum efficiency, for steel slag and soil
Every group of match ratio needs to make 6 test specimens seven days unconfined compression strength tests of progress in different ratio.It is put into standard curing within 6 days
+ 20 DEG C of case curing temperature, humidity 95% conserve, and carry out soaked one day within the 7th day and water level was flooding test specimen top 2.5cm.Examination
The selection of block weight is chosen according to compactness K, calculates as shown in formula (2) and formula (3):
In formula: K- compactness, %；
ρdPractical test specimen dry density, g/cm3；
Standard dry density, g/cm3
In formula: ρdPractical test specimen dry density, g/cm3；
ρωSample density, g/cm3；
ω-test specimen moisture content
According to the anti-weight for releasing each test specimen of above-mentioned two formula, it is accurate to 0.1g.In the way of reaction frame static pressure
Test specimen is made, utilizes ingot stripper to take out test specimen after specimen molding, height and weight measurement is carried out to test specimen before entering curing box
Record data；After maintenance six days, i.e., soaked preceding progress height and weight measurement record data；After soaked, surface moisture is wiped,
Test specimen weight and elevation carrection are carried out, data are recorded.It needs to make a strength test using standard ground surface material test pressure machine.
Water stability testing supports lower two groups using same markers and matches test specimen together, first group take out after maintenance six days it is soaked
It is tested after one day, second group is tested immediately after maintenance seven days.Data measured is compared, and show that intensity percent is water
Steady coefficient gammaw, it calculates as shown in formula (4):
In formula: γwThe steady coefficient ratio of water, %；
RWIn water impregnate 1d after test specimen unconfined compressive strength；
R0Without the unconfined compressive strength of the test specimen impregnated in water.
The following examples only in detail for illustrating the present invention, do not limit the protection scope of invention in any way.
Embodiment 1
According to above-mentioned test procedure, choose 50 parts of steel slags, 50 parts of soil, 5 parts of portland cements, 40 parts of micro-powder as additive with
And expansion rate test specimen and unconfined specimen is made according to code requirement in optimum moisture content in 0.02 part of modifying agent, 10
After it final expansion rate be 0.21% < 2% (10 days high temperature bath expansion rates of " road steel slag " code requirement are less than 2%), 7
Its compression strength is 4.54MPa, and the steady coefficient of water is 92%.Specification level-one road intensity requirement is met.
Comparative test 1: according to 1 same steps of example, difference removes the intake of micro-powder as additive, equally best
In the case of moisture content and 98% compactness, 10 days expansion rates 3.12% > 2% are measured according to code requirement, 7 days without lateral confinement resistance to compression
Intensity is 2.25MPa, and the steady coefficient of water is 68%.
Comparative test 2: according to 1 same steps of example, difference removes the intake of modifying agent, equally best aqueous
In the case of rate and 98% compactness, 10 days expansion rates 2.85% < 2%, 7 days unconfined compressive strengths are measured according to code requirement
For 2.08MPa, the steady coefficient of water is 72%.
Comparative test 3: according to 1 same steps of example, difference removes the intake of micro-powder as additive and modifying agent, together
Sample measures 10 days expansion rates 4.2% > 2%, 7 days nothings in optimum moisture content and 98% compactness, according to code requirement
Confined compressive strength is 1.27MPa, and the steady coefficient of water is 42%.
Comparative test 4: according to 1 same steps of example, difference is steady by the produced ionic soil body of domestic market
Determine agent substituting modification agent, equally in optimum moisture content and 98% compactness, measures 10 days expansion rates according to code requirement
2.26% > 2%, 7 days unconfined compressive strengths are 3.59MPa, and the steady coefficient of water is 80%.
Under the conditions of said ratio, the steady coefficient of the expansion rate of steel slag, compression strength, water is optimal.
Embodiment 2
According to above-mentioned test procedure, the specific gravity of steel slag and soil is 40 parts of steel slags, 60 parts of soil, 5 parts of portland cement, is modified
Agent is 0.02 part, adds 50 parts of micro-powder as additive, and measuring its 10 days expansion rates is 1.0% < 2%.
Comparative test 1: according to 2 same steps of example, difference change micro-powder as additive incorporation, be changed to admixture 40
Part micro-powder as additive, 10 days expansion rates are 1.2% < 2%.
Comparative test 2: according to 2 same steps of example, difference change micro-powder as additive incorporation, be changed to admixture 30
Part micro-powder as additive, 10 days expansion rates are 1.8% < 2%.
Under above-mentioned micro-powder as additive addition content, the mixing cured soil expansion rate of steel slag is optimal.
Embodiment 3
According to above-mentioned test procedure, choose 60 parts of steel slags, 40 parts of soil, 5 parts of portland cements, 40 parts of micro-powder as additive with
And 0.02 part of modifying agent, measuring its 7 days unconfined compressive strengths is 5.09MPa.
Comparative test 1: according to 3 same steps of example, difference change steel slag and soil incorporation, add 50 parts
Steel slag, 50 parts of soil, 7 days unconfined compressive strengths are 4.54MPa.
Comparative test 2: according to 3 same steps of example, difference change steel slag and soil incorporation, add 40 parts
Steel slag, 60 parts of soil, 7 days unconfined compressive strengths are 4.01MPa.
Comparative test 3: according to 3 same steps of example, difference change steel slag and soil incorporation, add 70 parts
Steel slag, 30 parts of soil, 7 days unconfined compressive strengths are 2.32MPa.
Comparative test 4: according to 3 same steps of example, difference change steel slag and soil incorporation, add 80 parts
Steel slag, 20 parts of soil, 7 days unconfined compressive strengths are 2.85MPa.
Under the conditions of the incorporation of above-mentioned steel slag and soil, unconfined compressive strength reaches most intensity values within 7 days.
Claims (6)
1. a kind of mixing cured soil body road basement material of steel slag, ingredient are as follows: 50-70 parts of soil, 30-50 parts of steel slags, 30-50
Part micro-powder as additive, 3-5 parts of portland cements, 0.015-0.020 parts of modifying agent.
2. the mixing cured soil body road basement material of a kind of steel slag described in accordance with the claim 1, it is characterised in that: plain in soil
Native specific gravity is not less than 70%.
3. the mixing cured soil body road basement material of a kind of steel slag described in accordance with the claim 1, it is characterised in that: the steel slag
Partial size be no more than 3cm.
4. the mixing cured soil body road basement material of a kind of steel slag described in accordance with the claim 1, it is characterised in that: the micro mist
Additive includes flyash, blast-furnace cinder micro-powder, silicon ash and/or other industrial residue micro mists.
5. the mixing cured soil body road basement material of a kind of steel slag described in accordance with the claim 1, it is characterised in that: the silicic acid
Salt cement, label are not less than 32.5.
6. the mixing cured soil body road basement material of a kind of steel slag described in accordance with the claim 1, it is characterised in that: described changes
Property agent is made of strong oxidizer, ionic macromolecule activator, dispersing agent and curing catalysts.
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| CN112876184A (en) * | 2021-02-01 | 2021-06-01 | 重庆大学 | Sludge curing agent and preparation method and use method thereof |
| CN113860828A (en) * | 2021-12-03 | 2021-12-31 | 山东绿达建设发展集团有限公司 | Highway subgrade material and preparation method thereof |
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