CN107139325A - A kind of method that wet grinding cement prepares ready-mixed concrete - Google Patents

A kind of method that wet grinding cement prepares ready-mixed concrete Download PDF

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Publication number
CN107139325A
CN107139325A CN201710495096.7A CN201710495096A CN107139325A CN 107139325 A CN107139325 A CN 107139325A CN 201710495096 A CN201710495096 A CN 201710495096A CN 107139325 A CN107139325 A CN 107139325A
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China
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cement
concrete
admixture
grinding
ready
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CN107139325B (en
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张日华
丁梧秀
郭献军
王鸿毅
张凯斌
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Luoyang Institute of Science and Technology
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Luoyang Institute of Science and Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/003Methods for mixing
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14Compositions 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 calcium sulfate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028Aspects relating to the mixing step of the mortar preparation

Abstract

The present invention relates to a kind of method that wet grinding cement prepares ready-mixed concrete, at ready-mixed concrete scene, the water of mixing concrete is used for wet grinding cement and prepares ready-mixed concrete.Clinker and the pre- grinding of the natural gypsum to particle diameter are first no more than 0.2mm, then by water reducer, water and admixture, progress wet ball grinding grinding is mixed with the material after pre- grinding, the cement mortar after grinding is added into concrete mixer with needing to be spiked into after the admixture of ready-mixed concrete is mixed again, coarse-fine aggregate is added simultaneously, it is agitated uniformly to obtain ready-mixed concrete.The present invention changes traditional dry method pulverizing cement ready-mixed concrete, and using live wet method pulverizing cement, because clinker is granular, transport is more convenient, and cost of transportation is low;Dust pollution is not produced in grinding, mill efficiency is high, improve cement granules pattern and level is matched somebody with somebody, the quality stability of cement, reduce the pollution of transportation and concrete production process to environment, it is economic and environment-friendly.

Description

A kind of method that wet grinding cement prepares ready-mixed concrete
Technical field
The invention belongs to technical field of concrete preparation, and in particular to a kind of wet grinding cement prepares ready-mixed concrete Method.
Background technology
Existing concrete is prepared simply by by cement, and admixture, coarse aggregate, fine aggregate, water, water reducer is mixed in proportion Conjunction is prepared from, and its flow chart is as shown in figure 1, the bulk cement used in preparation process is generally P.042.5 cement, in water Mud station-service bulk vehicle is transported to mixing plant and is stored in cement bulk storehouse, then live by bulk cement and admixture, water, diminishing Agent, thick, fine aggregate measure latter and stir into concrete in proportion.
Dry method pulverizing cement is used when preparing concrete at present, cement grinding is the important step of manufacture of cement, grinding Cost accounts for 35% or so of manufacture of cement totle drilling cost, and grinding pow consumption accounts for 70% or so that manufacture of cement integrates power consumption.Existing ball milling Dry method pulverizing cement prepares concrete and there is following defect:
1st, clinker granularity after Grinding Process in Cement Plants is thinner, and transportation needs powder special equipment, and (powder is in bulk Car), and cargo handling process has secondary pollution.
2nd, temperature is high in dry method grinding, mill, is also easy to produce gypsum dehydration, influences cement quality;Electrostatic phenomenon is also easy to produce simultaneously, Particle is set to reunite again, influence cement fineness and efficiency;The sphericity of cement granules pattern not enough, finally influences concrete Construction quality is (such as:Water requirement, slump etc.).
3rd, ball mill ventilation produces substantial amounts of dusty gas in grinding process, and easily environment is polluted, and handles dust-laden Gas technology and equipment cost are high.
4. measuring accuracy is inaccurate, during cement enters concrete mixer, due to needing to add water, aqueous vapor occur will The phenomenon of cement discharging blockage, influence production.
5th, in concrete whipping process, there is dust pollution and mixing evenness not in cement and the admixture of dry method grinding Good phenomenon.
The content of the invention
It is an object of the invention to provide a kind of method that wet grinding cement prepares ready-mixed concrete, cement fortune can be reduced Defeated cost, the efficiency for improving cement grinding, the quality stability for lifting cement production process, reduction transportation and coagulation are autochthonal Pollution of the production process to environment, and improve the granule-morphology of cement, the final quality for improving concrete.
The object of the invention to solve the technical problems is realized using following technical scheme.According to present invention proposition A kind of wet grinding cement prepare ready-mixed concrete method, comprise the following steps:
(1) clinker is subjected to pre- grinding according to metering with the natural gypsum than mixing first, pre- grinding uses dry method, will Material particular diameter is milled to no more than 0.2mm, obtains compound powder X;
(2) admixture B, water and water reducer are mixed evenly according to metering than feeding, obtain mixed slurry Y;
(3) compound powder X and mixed slurry Y is added and drives stream ball mill, carry out wet grinding, it is defeated by shurry pump afterwards Deliver in stirring pool, according to metering than adding admixture A, stir, obtain slurry Z;
(4) by slurry Z by the metered concrete mixer of scooping feeding device, while by thick, fine aggregate according to metering Than adding the concrete mixer, ready-mixed concrete is obtained by stirring.
The object of the invention to solve the technical problems can also be realized using following technical scheme.
A kind of method that wet grinding cement prepares ready-mixed concrete, comprises the following steps:
(1) clinker is subjected to pre- grinding according to metering than feeding first, pre- grinding uses dry method, by clinker grain Footpath is milled to no more than 0.2mm, obtains material M;
(2) desulfurated plaster, admixture B, water and water reducer are mixed evenly according to metering than feeding, obtain material N;
(3) material M and material N is added and drives stream ball mill, carried out wet grinding, stirring is delivered to by shurry pump afterwards Chi Zhong, according to metering than adding admixture A, stirs, obtains slurry Z;
(4) by slurry Z by the metered concrete mixer of scooping feeding device, while by thick, fine aggregate according to metering Than adding the concrete mixer, ready-mixed concrete is obtained by stirring.
The object of the invention to solve the technical problems can be also applied to the following technical measures to achieve further.
A kind of foregoing wet grinding cement prepares the method for ready-mixed concrete, the composition of the admixture A and admixture B It is identical.
The method that a kind of foregoing wet grinding cement prepares ready-mixed concrete, the clinker, gypsum, admixture B, Tetra- composition composition binder materials of admixture A, the clinker, gypsum, admixture B, the quality hundred of tetra- compositions of admixture A It is 100% to divide than sum.
The method that a kind of foregoing wet grinding cement prepares ready-mixed concrete, the consumption of the binder materials is every cube Concrete 260~550kg of binder materials;In binder materials, clinker, gypsum, admixture B, admixture A quality percentage Than being respectively:
Clinker:[(100-a) × 0.80)] %;
Gypsum:(b2/b1) × 5%;
Admixture B:[(100-a) × 0.15] %;
Admixture A:{a-[5×b2/b1- 0.05 × (100-a)] } %;
Wherein, a=20~50, b1=(2.2~2.4) %, b2=(2.6~2.8) %.
The method that a kind of foregoing wet grinding cement prepares ready-mixed concrete, every cube of concrete amount of water is 170~ 175kg;The addition of water reducer is that every cube of concrete adds 1.7~8.75kg.
The method that a kind of foregoing wet grinding cement prepares ready-mixed concrete, the addition of water is 0.32 according to water-cement ratio ~0.60 is metered;The addition of water reducer is 1.0%~5.0% metered according to water consumption.
Slurry Z and thick, fine aggregate in the method that a kind of foregoing wet grinding cement prepares ready-mixed concrete, stirring pool When adding concrete mixer, the consumption of coarse aggregate and fine aggregate is respectively:Every cube of concrete of coarse aggregate adds 1060~ 1120kg, every cube of concrete of fine aggregate adds 600~850kg.
Cement grinding is moved on to concrete mixing plant by the present invention from cement plant, using the live premixing coagulation of wet grinding technique Soil.The clinker of cement plant production is granular, and more P.042.5 bulk cement (powder) is convenient for transport, is transported using common truck It is defeated, transport to after concrete mixing plant, clinker and the natural gypsum are first directly subjected to pre- grinding, according to desulfurization stone Cream, then only need to carry out clinker the material particular diameter after pre- grinding, pre- grinding no more than 0.2mm, then by admixture B, water, Water reducer is stirred, or desulfurated plaster is stirred with admixture B, water, water reducer, afterwards by the material after pre- grinding Wet grinding is carried out with the slurry containing water reducer and admixture B, slurry is obtained, after slurry stirs together with admixture A Concrete mixer is added with scooping feeding device, is stirred together with thick, fine aggregate and prepares ready-mixed concrete.
Advantages of the present invention and have technical effect that:
1st, traditional method is that in cement plant dry method grinding clinker and admixture B (15%) and gypsum are obtained into bulk Cement, that is, P.042.5 cement, then the cement is transported to live stir with other auxiliary materials of concrete stirring with bulk vehicle prepared Concrete, because bulk cement is powdery, it is necessary to special transport vehicle, and transport and concrete whipping process are unavoidably produced A large amount of dust, causes severe contamination;
The method of the present invention uses the direct site operation of clinker, and clinker is transported to concrete and stirs scene, Scene with after the pre- grinding of gypsum again with the common wet ball grinding of other auxiliary materials (admixture, water reducer, water, aggregate etc.), due to cement Clinker is granular, transports more traditional P.042.5 bulk cement (powder) conveniently, cargo handling process and the pollution of concrete preparation process It is smaller.
2nd, pre- grinding to particle diameter is no more than 0.2mm in advance for clinker and gypsum, then is carried out with water reducer, water, admixture During wet grinding, it is possible to decrease temperature in mill, gypsum dehydration is not likely to produce;And wet grinding process does not produce electrostatic effect, efficiency It is high compared with dry method grinding.
3rd, wet grinding process of lapping, due to there is water, is more easy to make clinker generation spherical, improves of cement Particle shape looks, are conducive to improving the workability of concrete.
4th, binder materials is not required to consideration in concrete mixer and added water the problem of stirring during wet grinding, simply with it is thick Fine aggregate stirs, in identical mixing time, and this concrete homogenieity is more preferable.
5th, waste gas is not produced during wet grinding, without dust removal installation, reduces equipment investment cost, it is autochthonal in coagulation Pollution is not produced during production, is conducive to environmental protection yet.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, And can be practiced according to the content of specification, and in order to allow the present invention above-mentioned advantage and other purposes, feature and advantage It can become apparent, below especially exemplified by preferred embodiment, describe in detail as follows.
Brief description of the drawings
Fig. 1 is the production technology that existing dry method pulverizing cement prepares concrete;
Fig. 2 is the production technology that the present invention prepares ready-mixed concrete using natural gypsum wet grinding cement;
Fig. 3 is the production technology that the present invention prepares ready-mixed concrete using desulfurated gypsum wet pulverizing cement.
Embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, below in conjunction with Accompanying drawing and preferred embodiment, the method to preparing ready-mixed concrete according to a kind of wet grinding cement proposed by the present invention, it has Body embodiment, feature and its effect, are described in detail as after.
In order to more clearly show technical scheme, the special noun to occurring in the present invention is explained.
Admixture A is identical with admixture B composition in accompanying drawing, merely for convenience of description, it is represented respectively, specifically Ground, admixture A and admixture B are that existing admixture (such as mix by slag micropowder, flyash, the one or more of steel-making slag powder Close).Slightly, fine aggregate uses material to be existing.The present invention is intended to provide a kind of different methods for preparing concrete, used water Mud clinker, admixture, thick, fine aggregate, water reducer etc. are existing product.
It is well known that binder materials is made up of bulk cement and admixture A in concrete, both are at percentage by weight sum 100%.Bulk cement of the present invention refers to P.042.5 cement, is made up of clinker, gypsum and admixture B, the bulk water Mass percent shared by each composition of mud is:Clinker 80%, gypsum 5%, admixture B 15%.SO in binder materials3 It is mainly derived from SO in the gypsum in bulk cement, bulk cement of the present invention3Content be b1=(2.2-2.4) %.
In Fig. 1, when existing dry method pulverizing cement prepares ready-mixed concrete, if in binder materials admixture A quality Percentage is a%, then the mass percent of bulk cement is (100-a) %;Due to SO in bulk cement3(deriving from gypsum) Content is b1=(2.2-2.4) %, then in the binder materials, admixture A, clinker, gypsum, admixture B, SO3Quality hundred Fraction is respectively:
Admixture A:A%;Wherein, a=(20-50);
Clinker:(100-a) % × 80%=[(100-a) × 0.8] %;
Gypsum:(100-a) % × 5%=[(100-a) × 0.05] %;
Admixture B:(100-a) % × 15%=[(100-a) × 0.15] %;
SO3:(100-a) % × b1=[(100-a) × b1] %;Wherein, b1=(2.2-2.4) %.
When preparing concrete using live wet method pulverizing cement of the invention, due to clinker chance water generation hydration reaction Condense hardening, therefore wet grinding cement at the beginning when, cement begin to carry out aquation condensation.National standard requires general water The presetting period of mud is no earlier than 45 minutes, and final setting time is no more than 12 hours, and the presetting period of majority enterprise of China cement is in 70- 100 minutes, final setting time 150 minutes or so.If exceeding certain time during wet grinding (definitely no more than initial set Time), the slump and gradual loss of making cement mixing is excessive (or even can not prepare concrete), so as to influence to mix Solidifying soil application work and performance.Traditional ball mill without pre- grinding process opens stream technique, enter grind materials granularity it is larger (5mm with 85%) upper material accounts for, and cement residence time in mill is long, typically at 20-25 minutes;After pre- grinding technology, enter grind materials Granularity is smaller (below 0.2mm), cement shorter residence time, generally 10-13 minutes in mill, it is considered to the factor such as transport, arrives The concrete mixer time should be 15-18 minutes.When therefore using wet grinding cement, pre- grinding process shortens cement in mill Interior aquation setting time, but still accordingly shorten compared with cement produced with the dry method concrete batching concrete setting time ( It is exactly the 15-18 minutes needed for cement wet grinding process), therefore the wet grinding method of the present invention needs to take and arrange Apply, suppress condensation hardening of the cement during wet grinding, its setting time of proper extension.
Gypsum is traditional retarder, therefore, and wet grinding cement prepares ready-mixed concrete key and is that wet grinding During the content of appropriate increase gypsum (namely improve SO3Content), suppress condensation of the cement during wet grinding. The present invention is using the total gypsum content for improving binder materials in concrete, by SO in binder materials3Content improve to 2.6- 2.8%, gypsum is all filled in wet grinding cement, because admixture A is filled after grinding, therefore, this is relative carries Gypsum content (the i.e. SO of high wet method pulverizing cement process3Content).
The method for preparing ready-mixed concrete with reference to Fig. 2, wet grinding cement provided by the present invention, still sets binder materials Middle admixture A mass percent is a%, then clinker, gypsum, admixture B three's sum institute in binder materials in Fig. 2 The percentage accounted for is (100-a) %, then shared quality percentage in each comfortable binder materials of clinker, gypsum, admixture B Number is respectively:
Clinker:(100-a) % × 80%=[(100-a) × 0.8] %;
Gypsum:(100-a) % × 5%=[(100-a) × 0.05] %;
Admixture B:(100-a) % × 15%=[(100-a) × 0.15] %;
Wherein, a=20-50.
With reference to above formula, gypsum content is reduced compared with P.O42.5 cement, then SO3Content is reduced, specific reduction amount and admixture A Addition content it is relevant, addition content is higher (namely a values are bigger), SO3Content reduction is bigger, then unfavorable to concrete coagulation, And SO3Content is reduced, and the sulphate activation of binder materials is declined, and influences the performance of concrete (age strength, resistance to Long property etc.).
Because wet grinding cement key is that improving gypsum content (namely improves SO3Content), the present inventor exists Found in practical application, in ready-mixed concrete, when admixture A is more than 20%, SO3Mass percent in binder materials For b2During=(2.6-2.8) %, the ready-mixed concrete of preparation has preferable workability and performance.Therefore, it is of the invention Method be intended to control binder materials in SO3Mass percent be b2=(2.6-2.8) %, that is, improve SO3Content, this Technology needs to realize by improving gypsum content.
If by existing proportioning:The percentage composition of gypsum is [(100-a) × 0.05] % in binder materials, is as a result less than 5%, SO in binder materials3Content be [(100-a) × b1] %, b1=(2.2-2.4) %.If by SO in binder materials3's Content rises to b2During=(2.6-2.8) %, the gypsum content in binder materials should be:(b2/b1(result is more than) × 5% 5%, equivalent to the content for improving gypsum), wherein, b1=(2.2-2.4) %, b2=(2.6-2.8) %.
In Fig. 2, because admixture A, clinker, gypsum, admixture B mass percents sum are 100%, gypsum Content increase, then admixture A content should be reduced, and final admixture A mass percent should be:A%- [5% × b2/b1- (100-a) % × 5%]={ a- [5 × b2/b1- 0.05 × (100-a)] } %.
I.e. according to Fig. 2 flow, the metering of each raw material is:
In binder materials, cement clinker quality percentage is:[(100-a) × 0.80)] %;
Gypsum quality percentage is:(b2/b1) × 5%;
Admixture B mass percents are:[(100-a) × 0.15] %;
Admixture A mass percents are:{a-[5×b2/b1- 0.05 × (100-a)] } %;
Wherein, a=20~50, b1=(2.2~2.4) %, b2=(2.6~2.8) %.
The addition of water is 0.32~0.60 metered according to water-cement ratio;
The addition of water reducer is 1.0%~5.0% metered according to water consumption;
Generally, the addition of binder materials is 260~550kg in every cube of concrete, then the addition of water is Every cube of concrete adds 83~330kg, preferably 170~175kg, water reducer addition be every cube of concrete add 0.8~ 16.5kg, preferably 1.7~8.75kg, coarse aggregate addition are that every cube of concrete adds 1060~1120kg, fine aggregate addition For every cube of 600~850Kg of concrete.
In above-mentioned quantitative relation, a span is 20~50, b1=(2.2~2.4) %, b2=(2.6~2.8) %, Specific value data will determine that the intensity of different brackets concrete requirement is different, binder materials according to concrete grade in performance Ratio shared by middle admixture A is just different.
Fig. 2 is the premixing method of concrete when using the natural gypsum, and Fig. 3 is the premixing of concrete when using desulfurated plaster Method, it is identical when the metering method and ratio and Fig. 2 of each raw material are using the natural gypsum during using desulfurated plaster, simply use During desulfurated plaster, due to desulfurated plaster be powdery without prior pre- grinding, clinker only need to be carried out to pre- grinding, other steps It is identical.
Wet grinding is different from dry method grinding, slurry must have certain mobility after wet grinding, therefore water is mixed Dosage must be reasonable, certainly, and moisture more large fluidity is better, but moisture is excessive unfavorable to follow-up concrete production, because not With strength grade Concrete Design when have corresponding water-cement ratio, design strength is higher, and water-cement ratio is smaller, and current concrete is most Small design water-cement ratio is 0.32.And test and show, cement mortar will reach preferable mobility, not mix the situation of water reducer Under, its water content needs, in 50% or so (i.e. water-cement ratio is 0.5), to can be only achieved expected fluidity.To solve cement mortar stream Dynamic sex chromosome mosaicism, water reducer technology is filled with reference to ready-mixed concrete, and the present invention is in wet grinding cement, and water reducer should blended Expect B with water or admixture B with being filled in water, desulfurated plaster mixing process.
Embodiment 1:
With reference to Fig. 2, using the natural gypsum, the preparation method of ready-mixed concrete is:
(1) clinker is subjected to pre- grinding according to metering with the natural gypsum than mixing first, pre- grinding uses dry method powder Mill, material particular diameter is milled to less than or equal to 0.2mm, compound powder X is obtained;
(2) admixture B, water and water reducer are mixed evenly according to metering than feeding, obtain mixed slurry Y;
(3) compound powder X and mixed slurry Y is added and drives stream ball mill, carry out wet grinding, it is defeated by shurry pump afterwards Deliver in stirring pool, according to metering than adding admixture A, stir, obtain slurry Z;
(4) by slurry Z by the metered concrete mixer of scooping feeding device, while by thick, fine aggregate according to metering Than adding the concrete mixer, ready-mixed concrete is obtained by stirring.
Wherein, the metering of each raw material, which is compared, is:
In binder materials, cement clinker quality percentage is:[(100-a) × 0.80)] %;
Gypsum quality percentage is:(b2/b1) × 5%;
Admixture B mass percents are:[(100-a) × 0.15] %;
Admixture A mass percents are:{a-[5×b2/b1- 0.05 × (100-a)] } %;
Wherein, wherein, a=20~50, b1=(2.2~2.4) %, b2=(2.6~2.8) %.
Total addition of binder materials adds 260~550kg according to every cube of concrete;
The addition of water is that 0.32-0.60 is metered according to water-cement ratio, preferably 170~175kg;
The addition of water reducer is metered according to the 1.0%-5.0% of water consumption, preferably 1.7~8.75kg;
Coarse aggregate addition is that every cube of concrete adds 1060-1120kg, and fine aggregate addition is every cube of concrete 600-850Kg。
Embodiment 2:
With reference to Fig. 3, using desulfurated plaster, the preparation method of ready-mixed concrete is:
(1) clinker is subjected to pre- grinding according to metering than feeding first, pre- grinding uses dry method grinding, and cement is ripe Material particle diameter is milled to no more than under 0.2mm, obtaining material M;
(2) desulfurated plaster, admixture B, water and water reducer are mixed evenly according to metering than feeding, obtain material N;
(3) material M and material N is added and drives stream ball mill, carried out wet grinding, stirring is delivered to by shurry pump afterwards Chi Zhong, according to metering than adding admixture A, stirs, obtains slurry Z;
(4) by slurry Z by the metered concrete mixer of scooping feeding device, while by thick, fine aggregate according to metering Than adding the concrete mixer, ready-mixed concrete is obtained by stirring.
Wherein, the metering of each raw material, which is compared, is:
In binder materials, cement clinker quality percentage is:[(100-a) × 0.80)] %;
Gypsum quality percentage is:(b2/b1) × 5%;
Admixture B mass percents are:[(100-a) × 0.15] %;
Admixture A mass percents are:{a-[5×b2/b1- 0.05 × (100-a)] } %;
Wherein, wherein, a=20~50, b1=(2.2~2.4) %, b2=(2.6~2.8) %.
Total addition of binder materials adds 260~550kg according to every cube of concrete;
The addition of water is that 0.32-0.60 is metered according to water-cement ratio, preferably 170~175kg;
The addition of water reducer is metered according to the 1.0%-5.0% of water consumption, preferably 1.7~8.75kg;
Coarse aggregate addition is that every cube of concrete adds 1060-1120kg, and fine aggregate addition is every cube of concrete 600-850Kg。
It is described above, only it is the preferred embodiment of invention, any formal limitation not is done to the present invention, although The present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any those skilled in the art, Without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or are modified to With change equivalent embodiment, as long as being the content without departing from technical solution of the present invention, according to the present invention technical spirit to Any simple modification, equivalent variations and modification that upper embodiment is made, in the range of still falling within technical solution of the present invention.

Claims (8)

1. a kind of method that wet grinding cement prepares ready-mixed concrete, it is characterised in that comprise the following steps:
(1) clinker is subjected to pre- grinding according to metering with the natural gypsum than mixing first, pre- grinding uses dry method grinding, will Material particular diameter is milled to no more than 0.2mm, obtains compound powder X;
(2) admixture B, water and water reducer are mixed evenly according to metering than feeding, obtain mixed slurry Y;
(3) compound powder X and mixed slurry Y is driven into stream ball mill than addition according to metering, carries out wet grinding, pass through material afterwards Stock pump is delivered in stirring pool, according to metering than adding admixture A, is stirred, is obtained slurry Z;
(4) by slurry Z by the metered concrete mixer of scooping feeding device, while thick, fine aggregate is added according to metering ratio Enter the concrete mixer, ready-mixed concrete is obtained by stirring.
2. a kind of method that wet grinding cement prepares ready-mixed concrete, it is characterised in that comprise the following steps:
(1) clinker is subjected to pre- grinding according to metering than feeding first, pre- grinding uses dry method grinding, by clinker grain Footpath is milled to no more than 0.2mm, obtains material M;
(2) desulfurated plaster, admixture B, water and water reducer are mixed evenly according to metering than feeding, obtain material N;
(3) material M and material N is added and drives stream ball mill, carried out wet grinding, stirring pool is delivered to by shurry pump afterwards In, according to metering than adding admixture A, stir, obtain slurry Z;
(4) by slurry Z by the metered concrete mixer of scooping feeding device, while thick, fine aggregate is added according to metering ratio Enter the concrete mixer, ready-mixed concrete is obtained by stirring.
3. the method that wet grinding cement as claimed in claim 1 or 2 prepares ready-mixed concrete, it is characterised in that the blending Expect that A is identical with admixture B composition.
4. the method that wet grinding cement as claimed in claim 1 or 2 prepares ready-mixed concrete, it is characterised in that the cement Clinker, gypsum, admixture B, tetra- composition composition binder materials of admixture A, the clinker, gypsum, admixture B, blending The mass percent sum for expecting tetra- compositions of A is 100%.
5. the method that wet grinding cement as claimed in claim 4 prepares ready-mixed concrete, it is characterised in that the gelling material The consumption of material is every cube of 260~550kg of concrete binder materials;In binder materials, clinker, gypsum, admixture B, Admixture A mass percent is respectively:
Clinker:[(100-a) × 0.80] %;
Gypsum:(b2/b1) × 5%;
Admixture B:[(100-a) × 0.15] %;
Admixture A:{a-[5×b2/b1- 0.05 × (100-a)] } %;
Wherein, a=20~50, b1=(2.2~2.4) %, b2=(2.6~2.8) %.
6. the method that wet grinding cement as claimed in claim 5 prepares ready-mixed concrete, it is characterised in that every cube of coagulation Native amount of water is 170~175kg, and water reducer is 1.7~8.75kg.
7. the method that wet grinding cement as claimed in claim 5 prepares ready-mixed concrete, it is characterised in that the addition of water It is 0.32~0.60 metered according to water-cement ratio;Water reducer is 1.0%~5.0% metered according to water consumption.
8. the method that wet grinding cement as claimed in claim 1 or 2 prepares ready-mixed concrete, it is characterised in that in stirring pool Slurry Z when adding concrete mixer with thick, fine aggregate, the consumption of coarse aggregate and fine aggregate is respectively every cube of concrete: Coarse aggregate adds 1060~1120kg, and fine aggregate adds 600~850kg.
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CN111978031A (en) * 2020-09-10 2020-11-24 冯学智 Method for improving concrete strength

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