CN109987903A - A kind of blast-furnace cinder powder concrete applied on highway - Google Patents
A kind of blast-furnace cinder powder concrete applied on highway Download PDFInfo
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- CN109987903A CN109987903A CN201910353637.1A CN201910353637A CN109987903A CN 109987903 A CN109987903 A CN 109987903A CN 201910353637 A CN201910353637 A CN 201910353637A CN 109987903 A CN109987903 A CN 109987903A
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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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)
Abstract
The present invention provides a kind of blast-furnace cinder powder concrete applied on highway, blast-furnace cinder powder concrete is made of sandstone raw material, cement, admixture, water-reducing agent, and admixture is the mixture of ground granulated blast furnace slag or ground granulated blast furnace slag and flyash.Ground granulated blast furnace slag is gypsum and grinding aid to be added in blast-furnace cinder, and be made through superfine grinding technique, and the specific surface area of ground granulated blast furnace slag >=450 ㎡/kg.When admixture is the mixture of ground granulated blast furnace slag and flyash, the incorporation of flyash is the 15.0% of cement and admixture gross mass.The application of blast-furnace cinder powder concrete through the invention can effectively increase the mobility of concrete, reduce the total alkali of concrete, improve the durability of concrete, reduce the cost of concrete.
Description
Technical field
The present invention relates to technical field of concrete more particularly to a kind of ground granulated blast furnace slag coagulations applied on highway
Soil.
Background technique
Concrete is the indispensable composition of modern capital construction industry development, and the requirement to concrete performance has been increasingly more
Newly.High performance concrete has become a kind of trend.The concrete of different performance is not under conditions of influencing intensity, to change its work
Performance makes it meet specific environment requirement.Concrete is to use cement as cementitious material, and sand, masonry are to gather materials, can be with water, outer
Agent etc. is added to cooperate by a certain percentage, it is agitated and obtain, it is widely used in civil engineering.But construction of the highway is mostly field operation, side
Remote area natural conditions are poor, and transport is inconvenient, and the supply of equipment and raw material and the adjustment of construction team are difficult.
In recent years, with the economic sustained and rapid development in China, the infrastructure construction dynamics and scale in China are also continuous
It increases, the application of concrete component is also more and more.The cementitious materials usage amount such as cement is also more and more, and road construction cost is not
It is disconnected to increase.In expressway construction, highway construction is carried out by using the concrete containing flyash, to improve concrete
Workability, cohesiveness, reduce the cost of road construction.But before there is concrete after incorporation flyash is learnt in test
Phase gain in strength is slow, influences the striking time of concrete, the tensioning time of restressed beam slab, directly influences applying for scene
The problem of work progress.
In view of this, it is necessary to the concrete in the prior art applied on highway be improved, to solve
The property and cost problem of concrete.
Summary of the invention
The purpose of the present invention is to provide a kind of blast-furnace cinder powder concretes applied on highway, pass through Blast Furnace Ore
The use of ground-slag, according to its physics and chemical action, so that the working performance of concrete is obtained optimization improves, and effectively increases concrete
Mobility, reduce concrete total alkali, improve the durability of concrete, reduce the cost of concrete.
Realize that the technical solution of goal of the invention is as follows: a kind of blast-furnace cinder powder concrete applied on highway is high
Furnace slag powder concrete is made of sandstone raw material, cement, admixture, water-reducing agent, and admixture is ground granulated blast furnace slag or blast-furnace cinder
The mixture of powder and flyash.Ground granulated blast furnace slag is addition gypsum and grinding aid in blast-furnace cinder, and through superfine grinding technique system
, and the specific surface area of ground granulated blast furnace slag >=450 ㎡/kg.Waste residue rubbish when blast-furnace cinder is as steel-making is added gypsum and helps
Grinding agent is added in concrete after ultra-fine grinding process, and there is the ground granulated blast furnace slag after Ultrafine Grinding microballon lubricating effect can change
Kind concrete flowability, chemical reaction improve the intensity of concrete, reduce Chloride Ion in Concrete, alkali content, and then improve resistance to
Long property extends the service life of concrete.
When admixture is the mixture of ground granulated blast furnace slag and flyash, the incorporation of flyash is cement and the total matter of admixture
The 15.0% of amount, flyash can improve the workability of concrete, viscous stickiness, reduce the slump-loss of concrete.But
When the fine coal ash quantity of incorporation is less than 15.0%, flyash can not improve the working performance of concrete；When the fine coal ash quantity of incorporation is big
When 15.0%, it is slow to will lead to concrete gain in strength early period, and setting time extends, and then influences concrete subsequent construction.
Therefore, by the test to various parameters such as working performance of concrete, mechanics compression strength, fine coal is determined after test of many times verifying
The incorporation of ash is the 15.0% of cement and admixture gross mass.
Further, when admixture is the mixture of ground granulated blast furnace slag and flyash, the incorporation of ground granulated blast furnace slag is water
The 15.0~35% of mud and admixture gross mass.
Further, when admixture is ground granulated blast furnace slag, the incorporation of ground granulated blast furnace slag is cement and admixture gross mass
15~40.0%.
Further, sandstone raw material is micrite.Preferably, micrite is the micrite of the matter of white clouds containing carbonaceous.
Tongren Prefecture, Guizhou is mostly the micrite of the matter of white clouds containing carbonaceous, roadbed excavation and tunnel construction especially in road construction
When can generate a large amount of micrite and discard debris, and in road construction, the transport of goods and materials and personnel are more difficult, crystallite
Limestone, which discards debris, can be used as a kind of sandstone raw material use.
The principle of the present invention is:
Blast-furnace cinder is the waste residue product of steel-making, is made in the vitreous structure of blast-furnace cinder when cooling down containing higher
Energy, with the potential hydraulicity.After blast-furnace cinder is after superfine grinding technique wears into superfine powder, vitreous structure quilt
It destroys, potential activity is excited, so as to improve the mechanics compression strength of concrete；
Ground granulated blast furnace slag is active blend, and there is physics to fill out cooperation and use, and can improve cement base by chemical reaction
The secret room of body increases the stability of cement itself.Specifically, ground granulated blast furnace slag can absorb the alkali in concrete, improve mixed
Coagulate the alkali resistance of soil.Ground granulated blast furnace slag and cement generate solidification Ca (OH) because of hydration2It is solidifying that reaction generates hydrated calcium silicate
Glue, hydrated calcium silicate gel can be such that the pore structure in concrete is improved, macropore made to become smaller, and reduce porosity, increase coagulation
The compactness of soil；
In concrete mix ground granulated blast furnace slag after, ripple ratio using striaght cement concrete velocity of wave passing time it is short,
Velocity of wave is fast, frequency is high, and the compactness for mixing the concrete of ground granulated blast furnace slag is higher.
Compared with prior art, the invention has the advantage that:
1. mixing the concrete of ground granulated blast furnace slag, positive effect of the admixture in concrete can be preferably played.Blast furnace
When the incorporation of slag powders reaches certain proportion, working performance and compression strength to concrete have very big improvement；It can improve
The working performance of concrete；The mobility that concrete can be effectively increased increases the compactness of concrete；The chlorine of concrete can be reduced
Ion, total alkali improve the durability of concrete.
2. the application of blast-furnace cinder powder concrete can reduce cost while promoting concrete quality, and can reduce
Pollution, protection environment.
3. cement can generate the pollution such as dust, sulfur dioxide, carbon dioxide, noise, and water in winter when processing
The production of mud reduces the supply for influencing cement.Blast-furnace cinder is the waste residue product of steel-making, and using for blast-furnace cinder on the one hand can
Turn waste into wealth, and reduce the usage amount of cement, plays the role of environmental protection；On the other hand, blast-furnace cinder can reduce high speed
The cost of road construction in construction of the highway.
4. when highway construction, the transport of material is inconvenient and the period is long, a large amount of roadbed excavation can be generated in construction
And the waste residue stone of constructing tunnel, waste residue stone is utilized now again in construction, on the one hand can drop the accumulation of few waste residue stone,
On the other hand reduce through outside transport sandstone raw material, improve the period of road construction operation, reduce road construction at
This.
Specific embodiment
Invention is described in detail below by embodiment, but it should be stated that, these embodiments are not pair
Limitation of the invention, those of ordinary skill in the art according to these embodiments made by function, method or structure etc.
Effect transformation or substitution, all belong to the scope of protection of the present invention within.
The specific embodiment of the invention provides a kind of blast-furnace cinder powder concrete applied on highway, blast-furnace cinder
Powder concrete is made of sandstone raw material, cement, admixture, water-reducing agent.
Wherein, building stones raw material uses the lithology of Tongren Prefecture, Guizhou former for the sandstone of the matter micrite of white clouds containing carbonaceous
Coarse aggregate and fine aggregate is made in material, the matter micrite of white clouds containing carbonaceous after crushing.
Wherein, admixture is the mixture of ground granulated blast furnace slag or ground granulated blast furnace slag and flyash.
Wherein, cement is ordinary portland cement, high-mark cement etc..
Wherein the quality inspection standard of the various raw materials of blast furnace slag concrete and measured result are as shown in the table:
Table one: the matter micrite of white clouds containing carbonaceous
Table two: coarse aggregate
| Detection project | Standard | Testing result |
| Gradation | It is qualified | It is qualified |
| Clay content | ≤ 1.0% | 0.6~0.8% |
| Apparent density | > 2500kg/ ㎡ | 2712kg/㎡ |
| Chloride ion content | < 0.02% | 0.001% |
| Basic active | < 0.10 | 0.04 |
Table three: fine aggregate
| Detection project | Standard | Testing result |
| Gradation | It is qualified | It is qualified |
| < 0.075mm content | ≤ 10% | 8~9.6% |
| Methylenum careuleum | < 1.4g/kg | 1.2g/kg |
| Apparent density | > 2500kg/ ㎡ | 2717kg/㎡ |
| Crush values | < 20% | 11.7% |
| Chloride ion content | < 0.02% | 0.001% |
| Basic active | < 0.10 | 0.04 |
Table four, flyash
| Detection project | Standard | Testing result |
| Fineness | ≤ 25.0% | 19~22% |
| Loss on ignition | ≤ 8.0% | 6.0% |
| Sulfur trioxide | ≤3.0 | 1.0 |
| Rank | II grade of F class | II grade of F class |
Table five, cement
| Detection project | Standard | Testing result |
| Density | 3100kg/m3 | 3140kg/m3 |
| Specific surface area | ≥300㎡/kg | 334㎡/kg |
| Stability | ≤5.0mm | 2.0mm |
| Sulfur trioxide content | ≤ 3.5% | 1.7% |
| Content of MgO | ≤ 5.0% | 2.68% |
| Chloride ion content | ≤ 0.06% | 0.033% |
| Alkali content | ≤ 0.60% | 0.54% |
Table six, ground granulated blast furnace slag
Table seven: water-reducing agent, water-reducing agent are used to reduce the ratio of mud of concrete, make high bending tensile strength, resistance to persistence
Good concrete mix guarantees that concrete has preferable working performance.
| Detection project | Standard | Testing result |
| Water-reducing rate | >=25% | 28% |
| Compressive strength rate | >=130% | 140% |
| Air content | ≤ 6.0% | 3.3% |
| Total alkali content | ≤ 15% | 2.67% |
| Chloride ion content | ≤ 0.6% | 0.002% |
Embodiment 1:
In the present embodiment, blast-furnace cinder powder concrete is made of sandstone raw material, cement, admixture, water-reducing agent.
Admixture is ground granulated blast furnace slag, the incorporation of ground granulated blast furnace slag be cement and admixture gross mass 15~
40.0%.Wherein, when configuring strength grade C30~C35 concrete, the reasonable incorporation of ground granulated blast furnace slag is cement and blending
Expect the 15%-40% of gross mass；When configuring strength grade C40 concrete, the reasonable volume of ground granulated blast furnace slag is cement and mixes
Close the 15%-35% of material gross mass；When configuring strength grade C50 concrete, the reasonable volume of ground granulated blast furnace slag be cement and
The 15%-30% of admixture gross mass, prestressed concrete have rebound when can satisfy tensioning when guaranteeing 7d compression strength
Modulus value.When using high-mark cement, the reasonable mixed ratio of ground granulated blast furnace slag be can be improved in admixture, while in incorporation mine
Chloride Ion in Concrete and total alkali are also reduced therewith after ground-slag and flyash, and enhancing durability prolongs the service life.
Waste residue rubbish when blast-furnace cinder is as steel-making, hardness is big, and grindability is poor, and when operation can be added no more than blast furnace
1.0% grinding aid of slag weight carries out assisted milling, and because gypsum can excite the activity of blast-furnace cinder, improves blast-furnace cinder
The performance of powder can be added on a small quantity in blast-furnace cinder grinding.Gypsum and grinding aid is added after ultra-fine grinding process, is added to coagulation
In soil, the specific surface area of ground granulated blast furnace slag >=450 ㎡/kg after Ultrafine Grinding.There is ground granulated blast furnace slag microballon lubricating effect can change
Kind concrete flowability, chemical reaction improve the intensity of concrete, reduce Chloride Ion in Concrete, alkali content, and then improve resistance to
Long property extends the service life of concrete.
Wherein, sandstone raw material is the micrite of the matter of white clouds containing carbonaceous.Tongren Prefecture, Guizhou is mostly to contain carbonaceous white clouds matter
Micrite, roadbed excavation and when tunnel construction, can generate a large amount of micrite castaway slag especially in road construction
Stone, and in road construction, the transport of the materials such as sandstone raw material, cement, the transport of personnel is more difficult, and micrite is discarded
Debris can also be used as a kind of sandstone raw material, can in road construction establish rubble processing factory, the sandstone of production rubble, Machine-made Sand
Coarse aggregate and fine aggregate is made in raw material, the matter micrite of white clouds containing carbonaceous after crushing.
A kind of configuration proportion of blast-furnace cinder powder concrete in the present embodiment are as follows: middle sandstone raw material is 1m3；Normal silicate
Cement 304kg；Ground granulated blast furnace slag 76kg；LZ-J2 high performance water reducing agent of polyocarboxy acid is 3.8kg.
Embodiment 2:
In the present embodiment, blast-furnace cinder powder concrete is formed by sandstone raw material, cement, ground granulated blast furnace slag and flyash
Admixture, water-reducing agent composition.
Wherein, when configuring strength grade C30~C40 concrete, the constant incorporation of flyash is cement and admixture
Gross mass 15%, the incorporation of ground granulated blast furnace slag are cement and admixture gross mass 15%-35%；In configuration strength grade C50
When concrete, it is contemplated that carry out within prestressing force 7 days or so tensioning mud jacking construction period, the incorporation of flyash it is constant for cement and
Admixture gross mass 15%, the incorporation of ground granulated blast furnace slag are the 15%-20% of cement and admixture gross mass.When using high standard
When number cement, the reasonable mixed ratio of ground granulated blast furnace slag be can be improved in admixture, while be mixed after incorporation slag powders and flyash
Chloride ion and total alkali are also reduced therewith in solidifying soil, and enhancing durability prolongs the service life.
Waste residue rubbish when blast-furnace cinder is as steel-making, hardness is big, and grindability is poor, and when operation can be added no more than blast furnace
1.5% grinding aid of slag weight carries out assisted milling, and because gypsum can excite the activity of blast-furnace cinder, improves blast-furnace cinder
The performance of powder can be added on a small quantity in blast-furnace cinder grinding.Gypsum and grinding aid is added after ultra-fine grinding process, is added to coagulation
In soil, the specific surface area of ground granulated blast furnace slag >=450 ㎡/kg after Ultrafine Grinding.There is ground granulated blast furnace slag microballon lubricating effect can change
Kind concrete flowability, chemical reaction improve the intensity of concrete, reduce Chloride Ion in Concrete, alkali content, and then improve resistance to
Long property extends the service life of concrete.
Wherein, sandstone raw material is the micrite of the matter of white clouds containing carbonaceous.Tongren Prefecture, Guizhou is mostly to contain carbonaceous white clouds matter
Micrite, roadbed excavation and when tunnel construction, can generate a large amount of micrite castaway slag especially in road construction
Stone, and in road construction, the transport of the materials such as sandstone raw material, cement, the transport of personnel is more difficult, and micrite is discarded
Debris can also be used as a kind of sandstone raw material, can in road construction establish rubble processing factory, the sandstone of production rubble, Machine-made Sand
Coarse aggregate and fine aggregate is made in raw material, the matter micrite of white clouds containing carbonaceous after crushing.
A kind of configuration proportion of blast-furnace cinder powder concrete in the present embodiment are as follows: including 1m3Sandstone raw material；190kg is common
Portland cement；133kg ground granulated blast furnace slag；57kg flyash；Water-reducing agent is 3.05kgLZ-J2 high performance water reducing agent of polyocarboxy acid.
The configuration of ground granulated blast furnace slag concrete and application method in the embodiment of the present invention 1 and embodiment 2 are as follows:
1. collecting sandstone raw material, sandstone raw material is ground into coarse aggregate and fine aggregate, it is spare；
2. grinding aid and gypsum are added in blast-furnace cinder, extra-fine grinding is carried out, high mine slag powders are made, it is spare；
3. the mix of concrete material is carried out in mixing station, by the coarse aggregate and fine aggregate that are related to proportion (through sandstone raw material
Be made), cement, ground granulated blast furnace slag (or ground granulated blast furnace slag and flyash), water-reducing agent be added in mixing and blending machine, add appropriate
Water be stirred, mixing time be 15~30min, revolving speed be not less than 230r/min.
4. the concrete mixed progress entity is poured, the position of cast in situs includes: pile foundation, column, cushion cap, shield
Confession, binder, deck paving, wet seam, T beam, two linings, are faced upward etc. at bent cap in column, concrete grade: C30, C35, C40, C50.
Experimental test is carried out to the blast-furnace cinder powder concrete configured according to above step:
Firstly, it is necessary to check pour part concrete surface whether endure cold, adhesion, contraction fissure, whether corner falls off, applies
At work seam whether there is or not endure cold trace phenomena such as.
Secondly, to parameters such as the working performance of concrete of cast-in-place part, compression strength and entity structure object rebound strengths
It is tested.According to the proportion of the blast-furnace cinder powder concrete of embodiment 1 and embodiment 2, according to matching for blast furnace slag concrete
It sets and application method, mechanical property, frost resistance Anti-Chloride Ion Penetration, Salt frost resistance is carried out to concrete casting part and tested
(with reference to fast freeze-thaw test in " Standard for test methods of longterm performance and durability of ordinary concrete standard " GB/T50082-2009,
Electric flux test, single side salt freeze test), test result is as follows shown in table:
Table eight: by taking C30 normal concrete as an example:
Table nine: by taking C40 normal concrete as an example:
Table ten: by taking C50 normal concrete as an example:
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any label in claim should not be construed as limiting the claims involved.
Claims (5)
1. a kind of blast-furnace cinder powder concrete applied on highway, it is characterised in that: blast-furnace cinder powder concrete is by sand
Stone raw material, cement, admixture, water-reducing agent composition；
The admixture is the mixture of ground granulated blast furnace slag or ground granulated blast furnace slag and flyash, and the ground granulated blast furnace slag is blast furnace
Gypsum and grinding aid are added in slag, and is made through superfine grinding technique, and specific surface area >=450 of the ground granulated blast furnace slag
㎡/kg；
When the admixture is the mixture of the ground granulated blast furnace slag and flyash, the incorporation of the flyash is the cement
And the 15.0% of the admixture gross mass.
2. according to right want 1 described in a kind of blast-furnace cinder powder concrete applied on highway, it is characterised in that: it is described
When admixture is the mixture of the ground granulated blast furnace slag and flyash, the incorporation of the ground granulated blast furnace slag is the cement and institute
State the 15.0 ~ 35% of admixture gross mass.
3. according to right want 1 described in a kind of blast-furnace cinder powder concrete applied on highway, it is characterised in that: it is described
When admixture is the ground granulated blast furnace slag, the incorporation of the ground granulated blast furnace slag is the cement and the admixture gross mass
15~40.0%。
4. according to right want 1 described in a kind of blast-furnace cinder powder concrete applied on highway, it is characterised in that: it is described
Sandstone raw material is micrite.
5. according to right want 4 described in a kind of blast-furnace cinder powder concrete applied on highway, it is characterised in that: it is described
Micrite is the micrite of the matter of white clouds containing carbonaceous.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113582619A (en) * | 2021-08-03 | 2021-11-02 | 宁夏盛通建设工程有限公司 | Mineral powder-doped concrete and preparation method thereof |
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