CN110194648A - It is a kind of for producing the new type mortar and preparation method of steam-pressing aero-concrete - Google Patents
It is a kind of for producing the new type mortar and preparation method of steam-pressing aero-concrete Download PDFInfo
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- CN110194648A CN110194648A CN201910420475.9A CN201910420475A CN110194648A CN 110194648 A CN110194648 A CN 110194648A CN 201910420475 A CN201910420475 A CN 201910420475A CN 110194648 A CN110194648 A CN 110194648A
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- concrete
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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
- C04B28/34—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 cold phosphate binders
- C04B28/344—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 cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of for producing the new type mortar of steam-pressing aero-concrete, is made of raw material from the following weight: 95~120 parts of clinker, 25~40 parts of magnesium phosphate cement, 2~8 parts of semi-hydrated gypsum.The application creativeness uses the raw material of clinker, magnesium phosphate cement, semi-hydrated gypsum as steam-pressing aero-concrete mortar, and raw material used is trade waste, which can substitute cement as cementitious material, reduce the production cost of steam-pressing aero-concrete；Magnesium phosphate cement condensation is very fast, it is added between the quiet stopping time that magnesium phosphate cement can shorten mortar in mortar, the guarantee mortar presetting period is 70~140min, and the presetting period of ordinary portland cement is usually 150~200min, therefore, the new type mortar shortens 30~60min between the stopping time more quiet than ordinary portland cement, so shorten it is quiet stop curing time, to improve production efficiency.
Description
Technical field
The invention belongs to technical field of concrete preparation more particularly to a kind of for producing the novel of steam-pressing aero-concrete
Mortar and preparation method.
Background technique
Steam-pressing aero-concrete has porous structure, small (the B07 grades of building block thermal coefficient≤0.18W/m of thermal coefficient
K, B06 grades of building block thermal coefficient≤0.16W/mK), have light and good heat preservation, heat-insulated, fire performance, also there is life
The features such as high-efficient, production energy consumption is low is produced, the most attention of construction industry is received.Steam-pressing aero-concrete is a kind of achievable money
Source, environment, performance and cost optimal combination new green environment protection energy-saving material, be that the unique one kind in the world today is able to satisfy cold
The single materials for wall of regional 65% or more power conservation requirement.
In recent years, with the raising of building energy conservation requirement, steam-pressing aero-concrete develops to high-quality, and thin mortar joint thin is smeared
Autoclave aerated concrete building block (reaching high-class product requirement in national standard GB11968-2006) occupation rate of market fast lifting of ash, and
The steam-aerated concrete plate for being satisfied with assembled architecture application is used in national large-scale popularization.Therefore, add in production steam pressure
Need to improve the index of quality requirement of each raw material when gas concrete.
Mortar is the solidifying raw material for preparing steam-pressing aero-concrete core, and current each cement producer predominantly meets tradition
The requirement in concrete market (such as: the engineerings such as building, highway, bridge, tunnel) is produced, mortar mainly use flyash,
The mixing materials such as cinder, Phosphorus Slag, gypsum, Guamishi, basalt, boiler slag are made.Current ordinary portland cement on the market,
Such as P.O 42.5, presetting period are usually 150~200min, compression strength is 43.0MPa within 28 days, due to later strength
It is not high, working efficiency is reduced, and preparation cost is higher, and reduces unnecessary quiet stop for steam-pressing aero-concrete
To the time by be important, due to it is quiet stop, slurry needs the cementitious material that presetting period early period is fast and intensity is high in foaming process,
Therefore ordinary portland cement on the market is not especially well-suited for the production of steam-pressing aero-concrete (building block or plate), due to
Just final setting time length causes pouring stability poor to cement, it is quiet stop curing time is long, the green body porosity is uneven, when getting angry with hardening
Between mismatch, building block later strength rise it is slow the problems such as.
Summary of the invention
The present invention in order to solve the above technical problems, provide a kind of new type mortar for producing steam-pressing aero-concrete and
Preparation method.
In order to reach purpose described above, the invention adopts the following technical scheme:
It is a kind of for producing the new type mortar of steam-pressing aero-concrete, be made of raw material from the following weight: clinker
95~120 parts, 25~40 parts of magnesium phosphate cement, 2~8 parts of semi-hydrated gypsum.
Further, described a kind of for producing the new type mortar of steam-pressing aero-concrete, by the original of following parts by weight
Material is made: 107 parts of clinker, 33 parts of magnesium phosphate cement, 5 parts of semi-hydrated gypsum.
Further, the semi-hydrated gypsum is chemical gypsum, in the natural gypsum, desulfurized gypsum, citric acid gypsum, the plaster of paris
One or more；The plaster of paris is product of the ardealite after calcining and sloughing 3/2 crystallization water, and chemical formula is
CaSO4·1/2H2O。
Further, the clinker is semi-finished product when cement plant produces cement.
Further, the magnesium phosphate cement is the mixture of dead burnt magnesite and monoammonium phosphate, and dead burnt magnesite and monoammonium phosphate
Ratio=2~3:1；The dead burnt magnesite by magnesite after 1900 DEG C of 3~4h of calcining grinding obtain, content of magnesia be 90~
93%, fineness is 150~200 mesh；The fineness of the monoammonium phosphate is 200~300 mesh, and nutrient content is 53~60%.
It is further, a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, comprising the following steps:
(1) prebake: weighing clinker, magnesium phosphate cement, semi-hydrated gypsum according to parts by weight, then carries out respectively pre-
Drying and processing；
(2) ball milling: the later raw material of above-mentioned preliminary drying dry-cure is sent into ball mill and carries out ball milling mixing, is milled to material
Specific surface area is 300~400m2/kg；
(3) it is homogenized: the good material of above-mentioned ball milling being sent into blender and is stirred mixing, obtains powder gelatin after sieving
Property material, is made the new type mortar.
Further, in step (1), the temperature of the preliminary drying dry-cure is 35~50 DEG C, and the time is 180~220min,
Relative air humidity is 20~25%.
Further, in step (2), the time of the ball milling is 18~25min.
Further, in step (3), the fineness of the powder gelatin material is controlled 10% hereinafter, first, final setting time
For 70~140min, effective Cao content is greater than 63%.
Further, in step (3), the sieving was 70~90 μm of square hole screens.
The magnesia after 1900 DEG C of high-temperature calcinations of dead burned magnesia used in the present invention is fine and close, and density is higher than 3.4g/cm3,
Magnesium oxide particle intensity is high, and activity reduces, and retarder dosage is less, and the phosphorus magnesium material early strength prepared with it is higher.
Monoammonium phosphate used in the present invention is industrial grade product, its early strength of the phosphorus magnesium material of monoammonium phosphate preparation is obvious
Higher than the phosphate of other same types.
The application magnesium phosphate cement has selected high density magnesia and monoammonium phosphate, monoammonium phosphate and magnesia reaction rate
It is faster than the phosphate of same type, the intensity prepared using monoammonium phosphate is higher, and in magnesia and monoammonium phosphate proportion, due to oxygen
It is excessive to change magnesium, guarantees that phosphate component is reacted thoroughly completely, the complete magnesium oxide particle of unreacted, its own intensity is high, generates micro-
Gather materials effect, further increases the intensity of phosphorus magnesium material.
Since present invention employs above technical schemes, have the advantages that
(1) the application creativeness is using clinker, magnesium phosphate cement, semi-hydrated gypsum as steam-pressing aero-concrete mortar
Raw material, raw material used is trade waste, which can substitute cement as cementitious material, reduction steam-pressing aero-concrete
Production cost, improve productivity effect.
(2) condensation of the application magnesium phosphate cement is very fast, and addition magnesium phosphate cement can shorten the quiet of mortar and stop in mortar
Time, guarantee mortar just, final setting time be 70~140min, and the presetting period of ordinary portland cement be usually 150~
200min, therefore, new type mortar of the present invention shorten 30~60min between the stopping time more quiet than ordinary portland cement, and then shorten
The time of green body hardening, to improve production efficiency.
(3) improve in the product of air entrained concrete and presentation quality can because the new type mortar can promote green body to harden
Ratio of water to material when ingredient casting is increased, that is, improves the diffusance of mixed slurry, enhance the mobility of slurry, be conducive to be poured
The removal of stomata in slurry.Slurry can be made by being increased after ratio of water to material improves slurry mobility in the production process of aerated concrete panel
Reinforcing bar is wrapped up well, improves concrete to the bond stress of reinforcing bar.
(4) 28 days new type mortar same periods intensity will be apparently higher than ordinary portland cement (P.O 42.5) 12.0-
15.0MPa or so, this to the growth of air entrained concrete intensity during production and late maintaining by be it is important, greatly reduce brokenly
Loss rate generates.
Specific embodiment
Specific embodiments of the present invention will be described in further detail below, but the invention is not limited to these realities
Mode is applied, it is claimed to still fall within the claims in the present invention for any improvement or replacement on the present embodiment essence spirit
Range.
Embodiment 1
It is a kind of for producing the new type mortar of steam-pressing aero-concrete, be made of raw material from the following weight: clinker
95 parts, 25 parts of magnesium phosphate cement, 2 parts of semi-hydrated gypsum.
Further, the semi-hydrated gypsum is chemical gypsum, in the natural gypsum, desulfurized gypsum, citric acid gypsum, the plaster of paris
One or more；The plaster of paris is product of the ardealite after calcining and sloughing 3/2 crystallization water, and chemical formula is
CaSO4·1/2H2O；The clinker is semi-finished product when cement plant produces cement；The magnesium phosphate cement be dead burnt magnesite and
The mixture of monoammonium phosphate, and ratio=2:1 of dead burnt magnesite and monoammonium phosphate；The dead burnt magnesite is calcined by magnesite at 1900 DEG C
Grinding obtains after 3h, content of magnesia 90%, and fineness is 150 mesh；The fineness of the monoammonium phosphate is 200 mesh, nutrient content
It is 53%.
It is a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, comprising the following steps:
(1) prebake: weighing clinker, magnesium phosphate cement, semi-hydrated gypsum according to parts by weight, then carries out respectively pre-
Drying and processing；The temperature of the preliminary drying dry-cure is 35 DEG C, time 180min, relative air humidity 20%；
(2) ball milling: the later raw material of above-mentioned preliminary drying dry-cure is sent into ball mill and carries out ball milling mixing, is milled to material
Specific surface area is 300m2/kg；The time of the ball milling is 18min；
(3) it is homogenized: the good material of above-mentioned ball milling being sent into blender and is stirred mixing, obtains powder gelatin after sieving
Property material, is made the new type mortar；The fineness of the powder gelatin material is controlled 10% hereinafter, first, final setting time is
70-80min, effective Cao content are greater than 63%；, the sieving was 70 μm of square hole screens.
Embodiment 2
It is a kind of for producing the new type mortar of steam-pressing aero-concrete, be made of raw material from the following weight: clinker
120 parts, 40 parts of magnesium phosphate cement, 8 parts of semi-hydrated gypsum.
Further, the semi-hydrated gypsum be one of the natural gypsum, desulfurized gypsum, citric acid gypsum, the plaster of paris or
More than one；The plaster of paris is product of the ardealite after calcining and sloughing 3/2 crystallization water, chemical formula CaSO4·1/
2H2O；The clinker is semi-finished product when cement plant produces cement；The magnesium phosphate cement is dead burnt magnesite and monoammonium phosphate
Mixture, and ratio=3:1 of dead burnt magnesite and monoammonium phosphate；Dead burnt magnesite grinding after 1900 DEG C of calcining 4h by magnesite
It obtains, content of magnesia 93%, fineness is 200 mesh；The fineness of the monoammonium phosphate is 300 mesh, and nutrient content is 60%.
It is a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, comprising the following steps:
(1) prebake: weighing clinker, magnesium phosphate cement, semi-hydrated gypsum according to parts by weight, then carries out respectively pre-
Drying and processing；The temperature of the preliminary drying dry-cure is 50 DEG C, time 220min, relative air humidity 25%；
(2) ball milling: the later raw material of above-mentioned preliminary drying dry-cure is sent into ball mill and carries out ball milling mixing, is milled to material
Specific surface area is 400m2/kg；The time of the ball milling is 25min；
(3) it is homogenized: the good material of above-mentioned ball milling being sent into blender and is stirred mixing, obtains powder gelatin after sieving
Property material, is made the new type mortar；The fineness of the powder gelatin material is controlled 10% hereinafter, first, final setting time is
140min, effective Cao content are greater than 63%；, the sieving was 90 μm of square hole screens.
Embodiment 3
It is a kind of for producing the new type mortar of steam-pressing aero-concrete, be made of raw material from the following weight: clinker
100 parts, 30 parts of magnesium phosphate cement, 3 parts of semi-hydrated gypsum.
Further, the semi-hydrated gypsum be one of the natural gypsum, desulfurized gypsum, citric acid gypsum, the plaster of paris or
More than one；The plaster of paris is product of the ardealite after calcining and sloughing 3/2 crystallization water, chemical formula CaSO4·1/
2H2O；The clinker is semi-finished product when cement plant produces cement；The magnesium phosphate cement is dead burnt magnesite and monoammonium phosphate
Mixture, and ratio=2.2:1 of dead burnt magnesite and monoammonium phosphate；The dead burnt magnesite is by magnesite after 1900 DEG C of calcining 3.2h
Grinding obtains, content of magnesia 91%, and fineness is 160 mesh；The fineness of the monoammonium phosphate is 220 mesh, and nutrient content is
54%.
It is a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, comprising the following steps:
(1) prebake: weighing clinker, magnesium phosphate cement, semi-hydrated gypsum according to parts by weight, then carries out respectively pre-
Drying and processing；The temperature of the preliminary drying dry-cure is 40 DEG C, time 190min, relative air humidity 21%；
(2) ball milling: the later raw material of above-mentioned preliminary drying dry-cure is sent into ball mill and carries out ball milling mixing, is milled to material
Specific surface area is 320m2/kg；The time of the ball milling is 19min；
(3) it is homogenized: the good material of above-mentioned ball milling being sent into blender and is stirred mixing, obtains powder gelatin after sieving
Property material, is made the new type mortar；The fineness of the powder gelatin material is controlled 10% hereinafter, first, final setting time is
80min, effective Cao content are greater than 63%；, the sieving was 75 μm of square hole screens.
Embodiment 4
It is a kind of for producing the new type mortar of steam-pressing aero-concrete, be made of raw material from the following weight: clinker
115 parts, 35 parts of magnesium phosphate cement, 7 parts of semi-hydrated gypsum.
Further, the semi-hydrated gypsum be one of the natural gypsum, desulfurized gypsum, citric acid gypsum, the plaster of paris or
More than one；The plaster of paris is product of the ardealite after calcining and sloughing 3/2 crystallization water, chemical formula CaSO4·1/
2H2O；The clinker is semi-finished product when cement plant produces cement；The magnesium phosphate cement is dead burnt magnesite and monoammonium phosphate
Mixture, and ratio=2.8:1 of dead burnt magnesite and monoammonium phosphate；The dead burnt magnesite is by magnesite after 1900 DEG C of calcining 3.8h
Grinding obtains, content of magnesia 92%, and fineness is 190 mesh；The fineness of the monoammonium phosphate is 280 mesh, and nutrient content is
58%.
It is a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, comprising the following steps:
(1) prebake: weighing clinker, magnesium phosphate cement, semi-hydrated gypsum according to parts by weight, then carries out respectively pre-
Drying and processing；The temperature of the preliminary drying dry-cure is 45 DEG C, time 210min, relative air humidity 24%；
(2) ball milling: the later raw material of above-mentioned preliminary drying dry-cure is sent into ball mill and carries out ball milling mixing, is milled to material
Specific surface area is 380m2/kg；The time of the ball milling is 23min；
(3) it is homogenized: the good material of above-mentioned ball milling being sent into blender and is stirred mixing, obtains powder gelatin after sieving
Property material, is made the new type mortar；The fineness of the powder gelatin material is controlled 10% hereinafter, first, final setting time is
130min, effective Cao content are greater than 63%；, the sieving was 85 μm of square hole screens.
Embodiment 5
It is a kind of for producing the new type mortar of steam-pressing aero-concrete, be made of raw material from the following weight: clinker
107 parts, 33 parts of magnesium phosphate cement, 5 parts of semi-hydrated gypsum.
Further, the semi-hydrated gypsum be one of the natural gypsum, desulfurized gypsum, citric acid gypsum, the plaster of paris or
More than one；The plaster of paris is product of the ardealite after calcining and sloughing 3/2 crystallization water, chemical formula CaSO4·1/
2H2O；The clinker is semi-finished product when cement plant produces cement；The magnesium phosphate cement is dead burnt magnesite and monoammonium phosphate
Mixture, and ratio=2.5:1 of dead burnt magnesite and monoammonium phosphate；The dead burnt magnesite is by magnesite after 1900 DEG C of calcining 3.5h
Grinding obtains, content of magnesia 92%, and fineness is 180 mesh；The fineness of the monoammonium phosphate is 250 mesh, and nutrient content is
57%.
It is a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, comprising the following steps:
(1) prebake: weighing clinker, magnesium phosphate cement, semi-hydrated gypsum according to parts by weight, then carries out respectively pre-
Drying and processing；The temperature of the preliminary drying dry-cure is 43 DEG C, time 200min, relative air humidity 22%；
(2) ball milling: the later raw material of above-mentioned preliminary drying dry-cure is sent into ball mill and carries out ball milling mixing, is milled to material
Specific surface area is 350m2/kg；The time of the ball milling is 21min；
(3) it is homogenized: the good material of above-mentioned ball milling being sent into blender and is stirred mixing, obtains powder gelatin after sieving
Property material, is made the new type mortar；The fineness of the powder gelatin material is controlled 10% hereinafter, first, final setting time is
105min, effective Cao content are greater than 63%；, the sieving was 80 μm of square hole screens.
Comparative example 1
According in patent application CN201810871586.7 (a kind of New Type Aerated Concrete mortar and preparation method thereof)
Embodiment carries out.
Comparative example 2
According to the reality in patent application CN201811354755.6 (a kind of steam-pressing aero-concrete material and preparation method)
Apply example progress.
Mortar made from the embodiment of the present application 1~5 and comparative example 1~2 (P.O42.5 ordinary portland cement) are made
Concrete material be used to prepare steam-pressing aero-concrete, detect its presetting period, casting diffusance, bulk density and compression strength,
Meanwhile record-keeping system, for cost needed for same steam-pressing aero-concrete mortar, specific experiment result is as shown in table 1 below.
Table 1
As 1 experimental data of table it is found that mortar presetting period made from the application method, casting diffusance, bulk density and resistance to compression
Intensity is more preferable than comparative example, and cost is quite or lower than comparative example.
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 from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, nothing
By 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
Claim rather than above description limit, it is intended that by the institute in the meaning and scope for the equivalent loins for falling in claim
It changes and includes within protection scope of the present invention.
Claims (10)
1. a kind of for producing the new type mortar of steam-pressing aero-concrete, which is characterized in that be made of raw material from the following weight:
95~120 parts of clinker, 25~40 parts of magnesium phosphate cement, 2~8 parts of semi-hydrated gypsum.
2. according to claim 1 a kind of for producing the new type mortar of steam-pressing aero-concrete, which is characterized in that by with
The raw material of lower parts by weight is made: 107 parts of clinker, 33 parts of magnesium phosphate cement, 5 parts of semi-hydrated gypsum.
3. according to claim 1 or 2 a kind of for producing the new type mortar of steam-pressing aero-concrete, it is characterised in that:
The semi-hydrated gypsum be one of chemical gypsum, the natural gypsum, desulfurized gypsum, citric acid gypsum, the plaster of paris or more than one；
The plaster of paris is product of the ardealite after calcining and sloughing 3/2 crystallization water, chemical formula CaSO4·1/2H2O。
4. according to claim 1 or 2 a kind of for producing the new type mortar of steam-pressing aero-concrete, it is characterised in that:
The clinker is semi-finished product when cement plant produces cement.
5. according to claim 1 or 2 a kind of for producing the new type mortar of steam-pressing aero-concrete, it is characterised in that:
The magnesium phosphate cement is the mixture of dead burnt magnesite and monoammonium phosphate, and ratio=2 of dead burnt magnesite and monoammonium phosphate~3:1；Institute
State dead burnt magnesite by magnesite after 1900 DEG C of 3~4h of calcining grinding obtain, content of magnesia be 90~93%, fineness be 150~
200 mesh；The fineness of the monoammonium phosphate is 200~300 mesh, and nutrient content is 53~60%.
6. a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, which comprises the following steps:
(1) prebake: weighing clinker, magnesium phosphate cement, semi-hydrated gypsum according to parts by weight, then carries out prebake respectively
Processing；
(2) ball milling: the later raw material of above-mentioned preliminary drying dry-cure is sent into ball mill and carries out ball milling mixing, is milled to material ratio table
Area is 300~400m2/kg；
(3) it is homogenized: the good material of above-mentioned ball milling being sent into blender and is stirred mixing, powder gelatin material is obtained after sieving
Material, is made the new type mortar.
7. it is according to claim 6 a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, it is special
Sign is: in step (1), the temperature of the preliminary drying dry-cure is 35~50 DEG C, and the time is 180~220min, and air is relatively wet
Degree is 20~25%.
8. it is according to claim 6 a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, it is special
Sign is: in step (2), the time of the ball milling is 18~25min.
9. it is according to claim 6 a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, it is special
Sign is: in step (3), the fineness of the powder gelatin material control 10% hereinafter, just, final setting time be 70~
140min, effective Cao content are greater than 63%.
10. it is according to claim 6 a kind of for producing the preparation method of the new type mortar of steam-pressing aero-concrete, it is special
Sign is: in step (3), the sieving was 70~90 μm of square hole screens.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115893882A (en) * | 2022-10-13 | 2023-04-04 | 嘉华特种水泥股份有限公司 | Preparation method of early strength cement clinker, early strength cement clinker and early strength cement |
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Application publication date: 20190903 |