CN110436801A - A kind of highly resistance folding composite Portland cement and preparation method - Google Patents
A kind of highly resistance folding composite Portland cement and preparation method Download PDFInfo
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- CN110436801A CN110436801A CN201910858487.XA CN201910858487A CN110436801A CN 110436801 A CN110436801 A CN 110436801A CN 201910858487 A CN201910858487 A CN 201910858487A CN 110436801 A CN110436801 A CN 110436801A
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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
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
- C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type
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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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
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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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
- C04B7/52—Grinding ; After-treatment of ground cement
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the field of building materials, more particularly to a kind of highly resistance rolls over composite Portland cement and preparation method, the highly resistance folding composite Portland cement is made of raw material from the following weight: 35-65 parts of Portland clinkers, 17.5-40 parts of calcined clays, 10-22.5 parts of lime stones, 1.5-5 parts of gypsum.The present invention provides one kind from this concrete core raw material itself of cement, bend-press ratio is improved on the basis of guaranteeing higher strength of cement, improve bending strength of cement, and composite Portland cement is rolled over as highly resistance prepared by primary raw material using ordinary portland cement clinker, calcined clay and low-grade limestone and there is simple process, the preparation method suitable for industrialized production feature.
Description
Technical field
The invention belongs to the field of building materials more particularly to a kind of highly resistance folding composite Portland cement and preparation methods.
Background technique
The prior art and defect:
Cement, especially portland cement, as the concrete for being widely used in building, bridge, water conservancy and national defence
And the main and crucial cement components of cement mortar material, it is the core contribution person of the Key Performance Indicators such as its intensity.Water
The performance of mud directly determines the performance of concrete and cement mortar material, and existing traditional portland is due to flexural strength
It is low, it is easy that cracking destruction is occurred by the action of pulling stress generated in contraction process in use process, is increasingly difficult to meet mixed
The development need of solidifying soil buildings or structures object high-durability and long Years Of Service.The assembled cement components of wide popularization and application at present
Also the flexural strength of concrete and cement mortar material is proposed Deng, its own performance requirement and mechanization production mode higher
It is required that.
Existing traditional technology, it is main by the additives such as addition rubber powder, modified rubber and various fibers and modified material
Common methods improve the toughness and flexural strength of concrete and mortar, and principle is formed by the mutual overlap joint of admixture
Tridimensional network, the anti-folding load of the tension of bearing substrate, therefore require fully dispersed and biggish addition content and can just obtain
Ideal effect unavoidably will cause the complexity of concrete stirring technology and equipment and significantly rising for material cost.Cause
This improves the flexural strength of cement by technological means from this concrete of cement and cement mortar core material itself,
It is the low cost to solve the above problems, Gao Chengxiao method.And by the way that the mixing such as flyash and ground slag powder is added into cement
Material can improve bending strength of cement and bend-press ratio so that hydrolysis product of cement is finer and close to a certain extent, so as to improve
The flexural strength of concrete and cement mortar, but increase rate is extremely limited, and addition content is excessive while will cause compression strength
Be remarkably decreased.
Solve the difficulty and meaning of above-mentioned technical problem:
Therefore, these problems are based on, one kind is provided from this concrete core raw material itself of cement, is guaranteeing
Improve bend-press ratio on the basis of higher strength of cement, improve bending strength of cement, and with ordinary portland cement clinker,
Calcined clay and low-grade limestone are that the highly resistance of primary raw material preparation rolls over composite Portland cement and has simple process, are suitable for
The preparation method of industrialized production feature has important practical significance.
Summary of the invention
It is a kind of from this coagulation of cement present invention aims at being provided to solve technical problem present in well-known technique
Native core starting materials itself set out, and bend-press ratio is improved on the basis of guaranteeing higher strength of cement, improve the anti-folding of cement
Intensity, and the highly resistance folding prepared using ordinary portland cement clinker, calcined clay and low-grade limestone as primary raw material is compound
Portland cement.
The technical scheme adopted by the present invention to solve the technical problems existing in the known art is that
A kind of highly resistance folding composite Portland cement, the highly resistance roll over composite Portland cement by the raw material system of following parts by weight
At: 35-65 parts of Portland clinkers, 17.5-40 parts of calcined clays, 10-22.5 parts of lime stones, 1.5-5 parts of gypsum.
The principle of raising portland cement flexural strength of the invention is: the present invention utilizes metakaolin group in calcined clay
The high pozzolanic activity divided and particles filled effect, particles filled effect and the acceleration of hydration effect of Ground limestone powder, and
The reaction of the two complex superposition carboaluminates, generates the hydrated products such as C-A-S-H gel and list/half carbon drated calcium aluminate, forms three
Tie up network structure, refine hardening of cement body opening structure, solid cement aquation matrix, improve it is each to structural strength, thus to silicon
The flexural strength of acid salt cement is more obviously improved.
The present invention can also use following technical scheme:
In above-mentioned highly resistance folding composite Portland cement, further, the Portland clinker performance requirement is
3d compression strength is not less than 26.0Mpa, and compression strength is not less than 52.5MPa within 28 days, and it is ripe to meet general-purpose cement in GBT21372
The technical requirements of material.
In above-mentioned highly resistance folding composite Portland cement, further, the calcined clay is kaolin milltailings
With the combination of one or both of low-grade kaolin, it is prepared after calcining, chemical composition comprises the following components in percentage by weight is forged
Loss on ignition≤2.0%, Al of burnedc lay2O3>=25%, 1.5%≤Fe2O3And TiO2≤ 4.0%.
In above-mentioned highly resistance folding composite Portland cement, further, the kaolin milltailings and low-grade height
Ridge soil, mineral composition by weight percentage, kaolinite class mineral >=35%, remaining be quartzy class, feldspar, mica group and
Iron content titanium mineral any one or at least two combination.
In above-mentioned highly resistance folding composite Portland cement, further, the lime stone, chemical component by weight hundred
Divide than meter, 35.0%≤CaO≤47.0%, MgO≤20.0%, loss on ignition >=35.0%, mineral composition essential mineral is side
The one or two of Xie Shi and dolomite are compound, remaining be quartzy class, feldspar and mica mineral any one or at least
Two kinds of combination.
In above-mentioned highly resistance folding composite Portland cement, further, the gypsum includes natural dihydrate gypsum, natural
In anhydrite, semi-hydrated gypsum, α high strength gypsum, desulfurized gypsum, ardealite or fluorgypsum any one or at least two group
It closes.
It is the restriction to raw material above, embodies requirement of this technology to raw material characteristics.As: 1) portland cement used in is ripe
Material is the general clinker of existing national standard, represents the universality of this technology；2) calcined clay used in, it is desirable that loss on ignition, Al2O3Content and
Kaolinite class mineral content in the low-quality mine of Kaolin Tailings, above-mentioned parameter are the embodiment and guarantee of the material property, while
It is required that high-speed rail Ti content, embodies its low-quality characteristic；3) lime stone loss on ignition and calcium-magnesium content are limited, it is low-grade embodies its
Characteristic.Calcined clay and lime stone are without country/Industry code requirements, for the index of this technology special requirement.
Another object of the present invention is to provide a kind of with technique letter to solve technical problem present in well-known technique
It is single, the preparation method of the highly resistance folding composite Portland cement suitable for industrialized production feature.
A kind of highly resistance folding composite Portland cement preparation method, the highly resistance folding composite Portland cement preparation method are used for
Highly resistance folding composite Portland cement described in any of the above embodiments is prepared, the highly resistance folding composite Portland cement preparation method includes
Following steps:
Step 1: according to following parts by weight of raw materials ratio feeding: 35-65 parts of Portland clinkers, 17.5-40 parts of calcinings
Clay, 10-22.5 part lime stone, 2.5-5 parts of gypsum；
Step 2: obtaining the raw material in addition to calcined clay for step 1 and mix, intergrinding to specific surface area 380-
500m2/kg；
Step 3: the calcined clay raw material separate grinding that step 1 is obtained to specific surface area 550-900m2/kg；
The present invention is using separately grinding, and calcined clay is soft materials, and clinker and lime stone are hard ware material, if common powder
Mill will cause the excessive grinding of calcined clay, and clinker and lime stone do not obtain abundant grinding as a result, therefore wanting separate compiling again
Mixing.
Step 4: step 2 is uniformly mixed with levigate powder obtained by step 3 and rolls over complex silicate to get the highly resistance
Salt cement.
In conclusion the present invention has the advantages that:
1, particles filled effect and high pozzolanic activity of the present invention using metakaolin component in calcined clay, accelerates silicon
Hydrochlorate clinker hydration generates a large amount of C-A-S-H gels, hydrated cementitious matrix microstructure is refined, using in low-grade limestone
Calcite or dolomite particles filled effect, and its with the metakaolin Compound Water metaplasia carbon drated calcium aluminate of Cheng Dan/half, shape
At three-dimensional net structure, refine hardening of cement body opening structure, solid cement aquation matrix, improve it is each to structural strength, thus
The a greater degree of flexural strength for improving cement.
2, the present invention is made breakthroughs by cement material itself hydration mechanism research, and clinker used is normal silicate
Clinker, calcined clay and lime stone used are from kaolin milltailings, low-grade kaolin and low-grade limestone etc.
Solid waste and low value raw material are different from large dosage and use additives and the modified materials such as rubber powder, modified rubber and various fibers, will not
It causes material cost to rise, also haves no need to change stirring technique and equipment in concrete and cement mortar application process.
3, the present invention is utilized replaces using kaolin milltailings and low-grade kaolin as the calcined clay of raw material calcining preparation
In generation, traditional metakaolin material expanded raw material sources as cement additive, significantly reduced material cost, while being height
Ridge soil milltailings and low-grade kaolin integrated treatment and high-qualityization, which utilize, provides a new method.
4, the present invention has the characteristics that high breaking strength, low clinker dosage, lime stone can be all using high-silicon high magnesium
Low-grade limestone, be a kind of cement of green low-carbon.Due to that can change using low-grade limestone as cement additive
Water requirement that is kind and reducing cement, improves limestone mine utilization rate, is difficult to the low calcium lime utilized on a large scale for building trade
The utilization of stone, especially low calcium dolomitic lime stone provides a new method.
5, clinker accounting minimum only 35% in highly resistance folding composite Portland cement of the present invention, is a kind of green low-carbon water
Mud meets national low-carbon environment-friendly developing direction, and is conducive to cement and concrete and cement mortar enterprise cost efficiency, have compared with
Good environmental effect and economic benefits.The highly resistance of preparation rolls over composite Portland cement composite Portland cement in meeting GB175
Being greatly lowered for Portland clinker dosage is realized on the basis of technical requirements, is a kind of few clinker high-performance, low-carbon
The cement type of green is conducive to cement production enterprise cost efficiency, reduces the CO of unit cement products2Discharge amount.
Detailed description of the invention
Technical solution of the present invention is described in further detail below with reference to drawings and examples, but should
Know, these attached drawings are designed for task of explanation, therefore not as the restriction of the scope of the invention.In addition, except non-specifically
It points out, these attached drawings are meant only to conceptually illustrate structure construction described herein, without to be drawn to scale.
Fig. 1 is the mineral composition diffraction analysis of two lime stone 1 of embodiment；
Fig. 2 is the mineral composition diffraction analysis of two lime stone 2 of embodiment.
Specific embodiment
Highly resistance rolls over composite Portland cement and uses following technical scheme:
A kind of highly resistance folding composite Portland cement, the highly resistance roll over composite Portland cement by the raw material system of following parts by weight
At: 35-65 parts of Portland clinkers, 17.5-40 parts of calcined clays, 10-22.5 parts of lime stones, 1.5-5 parts of gypsum.
The principle of raising portland cement flexural strength of the invention is: the present invention utilizes metakaolin group in calcined clay
The high pozzolanic activity divided and particles filled effect, particles filled effect and the acceleration of hydration effect of Ground limestone powder, and
The reaction of the two complex superposition carboaluminates, generates the hydrated products such as C-A-S-H gel and list/half carbon drated calcium aluminate, forms three
Tie up network structure, refine hardening of cement body opening structure, solid cement aquation matrix, improve it is each to structural strength, thus to silicon
The flexural strength of acid salt cement is more obviously improved.
Highly resistance folding composite Portland cement of the invention can significantly subtract while improving bending strength of cement performance
The dosage of clinker in few cement, and can high additive utilize the difficulties resource such as low-quality lime stone；The cement can be applicable to prefabricated mixed
The fields such as solidifying soil component, assembled architecture and road concrete, have no need to change concrete production technology and equipment, can directly mention
High concrete flexural strength reduces cracking risk, reduces arrangement of reinforcement dosage and polymer and fiber and other material dosage, has good
Economic benefit and environment social benefit.
For further, raw material can also be defined, the Portland clinker performance requirement is 3d resistance to compression
Intensity is not less than 26.0Mpa, and compression strength is not less than 52.5MPa within 28 days, and meets the skill of general-purpose cement clinker in GBT21372
Art requirement.The calcined clay is the combination of one or both of kaolin milltailings and low-grade kaolin, after calcining
It is prepared, chemical composition comprises the following components in percentage by weight, loss on ignition≤2.0%, Al of calcined clay2O3>=25%, 1.5%≤
Fe2O3And TiO2≤ 4.0%.The kaolin milltailings and low-grade kaolin, mineral composition by weight percentage,
Kaolinite class mineral >=35%, remaining be quartzy class, feldspar, mica group and iron content titanium mineral any one or at least two
Combination.The lime stone, chemical composition comprises the following components in percentage by weight, 35.0%≤CaO≤47.0%, MgO≤20.0% are burnt
Vector >=35.0%, mineral composition essential mineral are that the one or two of calcite and dolomite are compound, remaining be quartzy class,
Feldspar and mica mineral any one or at least two combination.The gypsum includes natural dihydrate gypsum, natural hard
In gypsum, semi-hydrated gypsum, α high strength gypsum, desulfurized gypsum, ardealite or fluorgypsum any one or at least two combination.
It is the restriction to raw material above, embodies requirement of this technology to raw material characteristics.As: 1) portland cement used in is ripe
Material is the general clinker of existing national standard, represents the universality of this technology；2) calcined clay used in, it is desirable that loss on ignition, Al2O3Content and
Kaolinite class mineral content in the low-quality mine of Kaolin Tailings, above-mentioned parameter are the embodiment and guarantee of the material property, while
It is required that high-speed rail Ti content, embodies its low-quality characteristic；3) lime stone loss on ignition and calcium-magnesium content are limited, it is low-grade embodies its
Characteristic.Calcined clay and lime stone are without country/Industry code requirements, for the index of this technology special requirement.
Highly resistance rolls over composite Portland cement preparation method and uses following technical scheme:
A kind of highly resistance folding composite Portland cement preparation method, the highly resistance folding composite Portland cement preparation method are used for
Highly resistance folding composite Portland cement described in any of the above embodiments is prepared, the highly resistance folding composite Portland cement preparation method includes
Following steps:
Step 1: according to following parts by weight of raw materials ratio feeding: 35-65 parts of Portland clinkers, 17.5-40 parts of calcinings
Clay, 10-22.5 part lime stone, 2.5-5 parts of gypsum；
Step 2: obtaining the raw material in addition to calcined clay for step 1 and mix, intergrinding to specific surface area 380-
500m2/kg；
Step 3: the calcined clay raw material separate grinding that step 1 is obtained to specific surface area 550-900m2/kg；
The present invention is using separately grinding, and calcined clay is soft materials, and clinker and lime stone are hard ware material, if common powder
Mill will cause the excessive grinding of calcined clay, and clinker and lime stone do not obtain abundant grinding as a result, therefore wanting separate compiling again
Mixing.
Step 4: step 2 is uniformly mixed with levigate powder obtained by step 3 and rolls over complex silicate to get the highly resistance
Salt cement.
For further, the raw material of step 1 can also be defined, the Portland clinker performance requirement
It is not less than 26.0Mpa for 3d compression strength, compression strength is not less than 52.5MPa within 28 days, and meets general-purpose cement in GBT21372
The technical requirements of clinker.The calcined clay is the combination of one or both of kaolin milltailings and low-grade kaolin,
It is prepared after calcining, chemical composition comprises the following components in percentage by weight, loss on ignition≤2.0%, Al of calcined clay2O3>=25%,
1.5%≤Fe2O3And TiO2≤ 4.0%.The kaolin milltailings and low-grade kaolin, mineral composition by weight hundred
Point than meter, kaolinite class mineral >=35%, remaining be quartzy class, feldspar, mica group and iron content titanium mineral any one or
At least two combination.The lime stone, chemical composition comprises the following components in percentage by weight, 35.0%≤CaO≤47.0%, MgO≤
20.0%, loss on ignition >=35.0%, mineral composition essential mineral is compound for the one or two of calcite and dolomite, remaining
For quartzy class, feldspar and mica mineral any one or at least two combination.The gypsum includes natural two water stone
Any one in cream, natural anhydrite, semi-hydrated gypsum, α high strength gypsum, desulfurized gypsum, ardealite or fluorgypsum or at least two
The combination of kind.
It is the restriction to raw material above, embodies requirement of this technology to raw material characteristics.As: 1) portland cement used in is ripe
Material is the general clinker of existing national standard, represents the universality of this technology；2) calcined clay used in, it is desirable that loss on ignition, Al2O3Content and
Kaolinite class mineral content in the low-quality mine of Kaolin Tailings, above-mentioned parameter are the embodiment and guarantee of the material property, while
It is required that high-speed rail Ti content, embodies its low-quality characteristic；3) lime stone loss on ignition and calcium-magnesium content are limited, it is low-grade embodies its
Characteristic.Calcined clay and lime stone are without country/Industry code requirements, for the index of this technology special requirement.
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawing
Detailed description are as follows:
Embodiment 1-3 and comparative example 1-3:
Portland clinker, calcined clay and low-grade limestone ingredient used are shown in Table 1:
Table 1: composition of raw material
| Raw material | Loss | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | K2O | Na2O | TiO2 | Total |
| Clinker 1 | 0.33 | 23.16 | 5.21 | 3.31 | 63.31 | 2.92 | 0.62 | 0.64 | 0.13 | 0.00 | 99.65 |
| Calcined clay 1 | 0.67 | 66.77 | 25.82 | 1.36 | 3.11 | 0.96 | 0.13 | 0.04 | 0.11 | 0.71 | 99.69 |
| Lime stone 1 | 36.38 | 13.06 | 0.58 | 0.24 | 46.02 | 1.01 | 0.52 | 0.13 | 0.02 | 1.80 | 99.76 |
| Gypsum 1 | 21.39 | 6.66 | 2.22 | 0.83 | 29.32 | 1.82 | 38.04 | 0.44 | 0.11 | 0.10 | 100.98 |
Figure of description 1 is shown in the mineral composition analysis of lime stone 1, through X-ray diffraction analysis, lime stone 1 it is main contained
Mineral are calcite, are secondly quartz, are again perovskite.
By the proportion of embodiment listed by table 2 and comparative example, extremely by clinker 1, lime stone 1 and 1 intergrinding of gypsum
380~450m of specific surface area2/ kg, by 1 separate grinding of calcined clay to 550~750m of specific surface area2After/kg, with clinker 1, stone
The common levigate powder of lime stone 1 and gypsum 1 mixes, and obtains the highly resistance folding composite Portland cement, tests according to GBT17671
28 days cement mortar strengths of cement, test result are listed in table 2.
Table 2: cement composition proportion
It is above-mentioned statistics indicate that, highly resistance of the invention rolls over composite Portland cement, and the corresponding clinker coefficient of embodiment 1,2 and 3 is
0.65,0.50 and 0.45,28 days flexural strengths are significantly increased compared with the I type portland cement (clinker coefficient 0.95) of comparative example 1
(maximum amplification 22.5%), bend-press ratio is also significantly improved, and embodies the characteristic of high breaking strength and high bend-press ratio of the present invention.
Embodiment 2 and comparative example 2 and 3, i.e., highly resistance of the invention roll over composite Portland cement and identical clinker coefficient 0.50
Existing high-quality fly ash prepare composite Portland cement with ground slag powder and compare, the flexural strength that the present invention focuses on has aobvious
It writes and improves, and compression strength also has good performance, embody promotion of the present invention to existing traditional material performance.
Embodiment 4-8 and comparative example 4-6:
Portland clinker, calcined clay and low-grade limestone ingredient used are shown in Table 1
3 composition of raw material of table
| Raw material | Loss | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | K2O | Na2O | TiO2 | Total |
| Clinker 2 | 0.43 | 20.78 | 5.52 | 3.46 | 66.20 | 2.11 | 0.70 | 0.40 | 0.04 | 0.00 | 99.64 |
| Calcined clay 2 | 1.92 | 54.28 | 36.55 | 2.02 | 0.38 | 0.21 | 0.07 | 3.40 | 0.09 | 1.76 | 99.69 |
| Lime stone 2 | 44.52 | 2.21 | 0.76 | 0.68 | 35.22 | 16.00 | 0.08 | 0.08 | 0.02 | 0.00 | 99.57 |
| Gypsum 2 | 13.01 | 0.67 | 1.04 | 0.12 | 38.69 | 0.98 | 44.80 | 0.04 | 0.08 | 0.00 | 99.43 |
Figure of description 2 is shown in the mineral composition analysis of lime stone 2, through X-ray diffraction analysis, lime stone 2 it is main contained
Mineral are dolomite, are secondly calcite, are again quartz.
By the proportion of embodiment listed by table 3 and comparative example, extremely by clinker 1, lime stone 1 and 1 intergrinding of gypsum
450~500m of specific surface area2/ kg, by 1 separate grinding of calcined clay to 750~900m of specific surface area2After/kg with clinker 1, lime
The common levigate powder of stone 1 and gypsum 1 mixes, and obtains the highly resistance folding composite Portland cement, tests water according to GBT17671
28 days cement mortar strengths of mud, test result are listed in table 4.
4 cement composition of table proportion
It is above-mentioned statistics indicate that, highly resistance of the invention rolls over composite Portland cement, the corresponding clinker coefficient of embodiment 4,5,6 and 7
It is 0.65,0.50,0.45 and 0.40,28 days flexural strengths have aobvious compared with the I type portland cement (clinker coefficient 0.95) of comparative example 4
It writes and improves (maximum amplification 32.0%), bend-press ratio is also significantly improved, and embodies the characteristic of high breaking strength of the present invention.
Embodiment 5 and comparative example 5 and 6, i.e., highly resistance of the invention roll over composite Portland cement and identical clinker coefficient 0.50
Existing high-quality fly ash prepare composite Portland cement with ground slag powder and compare, the flexural strength that the present invention focuses on has aobvious
It writes and improves, and compression strength still has many performances, embody promotion of the present invention to existing traditional material.
Shown in embodiment 7, the highly resistance folding composite Portland cement of clinker coefficient 0.40 still meets 52.5 grade complex silicates
Salt cement intensity requirement, and shown in embodiment 8, the highly resistance folding composite Portland cement of clinker coefficient 0.35 still meets 42.5 grades
Composite Portland cement intensity requirement embodies the characteristic of the few clinker high-mark cement of the present invention.
In conclusion adapting to plant growth the present invention can provide a kind of variation of adaptation to the ground, there is multiduty be applicable in
In the fish type ecological revetment brick and chain ecological revetment brick of variation landform.
Above embodiments describe the invention in detail, but content is only the preferred embodiment of the present invention, no
It can be believed to be used to limit the scope of the invention.Any changes and modifications in accordance with the scope of the present application,
It should still fall within the scope of the patent of the present invention.
Claims (7)
1. a kind of highly resistance rolls over composite Portland cement, it is characterised in that: the highly resistance folding composite Portland cement is by following weight
The raw material of part is made: 35-65 parts of Portland clinkers, 17.5-40 parts of calcined clays, 10-22.5 parts of lime stones, and 1.5-5 parts
Gypsum.
2. highly resistance according to claim 1 rolls over composite Portland cement, it is characterised in that: the Portland clinker
It can require as 3d compression strength not less than 26.0Mpa, compression strength is not less than 52.5MPa within 28 days, and meets in GBT 21372 and lead to
With the technical requirements of clinker.
3. highly resistance according to claim 1 rolls over composite Portland cement, it is characterised in that: the calcined clay is kaolin
The combination of one or both of milltailings and low-grade kaolin, is prepared, chemical component by weight hundred after calcining
Divide than meter, loss on ignition≤2.0%, Al of calcined clay2O3>=25%, 1.5%≤Fe2O3And TiO2≤ 4.0%.
4. highly resistance according to claim 3 rolls over composite Portland cement, it is characterised in that: the kaolin milltailings and
Low-grade kaolin, mineral composition by weight percentage, kaolinite class mineral >=35%, remaining be quartzy class, feldspar,
Mica group and iron content titanium mineral any one or at least two combination.
5. highly resistance according to claim 1 rolls over composite Portland cement, it is characterised in that: the lime stone, chemistry at
Divide by weight percentage, 35.0%≤CaO≤47.0%, MgO≤20.0%, loss on ignition >=35.0%, mineral composition master
Want mineral compound for the one or two of calcite and dolomite, remaining is any of quartzy class, feldspar and mica mineral
It is a kind of or at least two combination.
6. highly resistance according to claim 1 rolls over composite Portland cement, it is characterised in that: the gypsum includes natural two water
In gypsum, natural anhydrite, semi-hydrated gypsum, α high strength gypsum, desulfurized gypsum, ardealite or fluorgypsum any one or at least
Two kinds of combination.
7. a kind of highly resistance rolls over composite Portland cement preparation method, it is characterised in that: the highly resistance rolls over composite Portland cement system
Preparation Method is used to prepare highly resistance folding composite Portland cement described in any one of claims 1-6, and the highly resistance rolls over complex silicate
Salt cement preparation method the following steps are included:
Step 1: according to following parts by weight of raw materials ratio feeding: 35-65 parts of Portland clinkers, 17.5-40 parts of calcinings are viscous
Soil, 10-22.5 parts of lime stones, 2.5-5 parts of gypsum；
Step 2: obtaining the raw material in addition to calcined clay for step 1 and mix, intergrinding to specific surface area 380-500m2/
kg；
Step 3: the calcined clay raw material separate grinding that step 1 is obtained to specific surface area 550-900m2/kg；
Step 4: step 2 is uniformly mixed with levigate powder obtained by step 3 and rolls over complex silicate salt water to get the highly resistance
Mud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910858487.XA CN110436801B (en) | 2019-09-11 | 2019-09-11 | High-fracture-resistance composite portland cement and preparation method thereof |
Applications Claiming Priority (1)
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| CN111875268A (en) * | 2020-08-05 | 2020-11-03 | 深圳大学 | Calcined clay, process for producing the same, and limestone calcined clay cement |
| CN115557756A (en) * | 2022-11-03 | 2023-01-03 | 华新水泥股份有限公司 | Carbonized board based on low-grade low-carbon cement clinker and preparation method thereof |
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| CN115557756A (en) * | 2022-11-03 | 2023-01-03 | 华新水泥股份有限公司 | Carbonized board based on low-grade low-carbon cement clinker and preparation method thereof |
| CN115557756B (en) * | 2022-11-03 | 2023-11-03 | 华新水泥股份有限公司 | Carbonized plate based on low-grade low-carbon cement clinker and preparation method thereof |
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