CN110372232A - It is a kind of not shrink cementitious material and preparation method thereof and concrete using made of ardealite - Google Patents
It is a kind of not shrink cementitious material and preparation method thereof and concrete using made of ardealite Download PDFInfo
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- CN110372232A CN110372232A CN201910564576.3A CN201910564576A CN110372232A CN 110372232 A CN110372232 A CN 110372232A CN 201910564576 A CN201910564576 A CN 201910564576A CN 110372232 A CN110372232 A CN 110372232A
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- ardealite
- cementitious material
- shrink
- concrete
- slag
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
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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
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/17—Mixtures thereof with other inorganic cementitious materials or other activators with calcium oxide containing activators
- C04B7/19—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
-
- 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
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The present invention relates to ardealite technical field of comprehensive utilization, it is especially a kind of not shrink cementitious material and preparation method thereof and concrete using made of ardealite, by carrying out compound being configured to mixing material to ardealite, flyash or phosphorus slag, water-granulated slag, steel slag, and ordinary portland cement is added and is prepared into and does not shrink cementitious material, high-valued comprehensive utilization has been carried out to ardealite, it is exciting agent using sulfate in ardealite, excite the activity of flyash, phosphorus slag, water-granulated slag, steel slag etc., and with Al in flyash, phosphorus slag, water-granulated slag, steel slag and cement2O3, hydrolysis product of cement Ca (OH)2Reaction, entringite AFt, filling and blocking inside concrete capillary slit are formed, in conjunction with the mass percent control to material composition, improve cementitious material performance, so that improving concrete density after being applied in concrete, volume expansion is generated, while acquisition does not shrink high performance concrete, hydration heat of cement is reduced, cement consumption is saved, reduces concrete production cost.
Description
Technical field
The present invention relates to ardealite technical field of comprehensive utilization, especially a kind of not shrink gelling using made of ardealite
Material and preparation method thereof and concrete.
Background technique
During ardealite is Wet-process Phosphoric Acid Production, rock phosphate in powder is through solid caused by sulfuric acid decomposition, filtering preparing phosphoric acid
Waste, 1 ton of phosphoric acid by wet process of every production will discharge about 4-5 tons of ardealite.For ardealite in powdered, main object, which coordinates, is divided into two
H 2 O calcium sulphate contains a small amount of quartz；Main chemical compositions be calcium oxide, sulfur trioxide, silica, phosphorus pentoxide, fluorine from
Son etc.；Content of the calcium sulphate dihydrate in ardealite is generally 90% or more.It counts and shows according to related data, global ardealite row
High-volume reach 1.5 hundred million tons, and China's ardealite discharge amount has been more than 70,000,000 tons, volume of cargo in storage over the years has reached 300,000,000 tons.So
Huge ardealite yield, not only brings threat to environment, but also also results in a large amount of ardealite wastings of resources；For this purpose, existing
Have and occur the largely research approach about ardealite comprehensive utilization in technology, but has focused largely on production brick, prepares sulfuric acid connection
Produce cement, sulphate aluminium cement, cement retarder, gypsum block etc..
As it can be seen that ardealite comprehensive utilization ratio, utility value are still lower, ardealite comprehensive utilization is caused to be still worldwide
Problem.In China, southwest is the important base of phosphorous chemical industry specialty industries, and its southwest and center area is especially with Guizhou Province's phosphorus stone
Cream discharge amount, utilization rate are lower.In order to accelerate the comprehensive utilization of Guizhou Province's ardealite resource, to improve ardealite comprehensive utilization ratio
And utility value, Guizhou provincial people's government have issued " about the opinion for accelerating ardealite comprehensive utilization of resources ", opinion requirement " with
With fixed output quota ", that is, it is exactly ardealite discharge enterprise can dissolve how many ardealite, how many ardealite can only be just discharged.Therefore, to phosphorus
Gypsum resource comprehensive utilization is particularly important.But it is high for ardealite comprehensive utilization of resources value in the prior art,
Cause ardealite resource added value lower, causes application scenario and bad.
Based on this, there is researcher that ardealite is applied to the preparation of cementitious material used in construction material preparation, such as
Number of patent application is gypsum based gel material disclosed in 201510207204.7, so that cementitious material utilizes aluminium sulfate water
Reaction generates the entringite with expansion characteristics after mud, portland cement and gypsum mixing, so that having fast solidifying, fast hard and low receipts
The characteristic of shrinkage.The lower shrinkage early-strength filling in mine cementitious material that such as number of patent application is 201710062923.3 again, makes
It must fill that condensation is fast, intensity is high, it is small to shrink.But the prior art is due to inappropriate to ardealite application method, in cementitious material
Material fiting ratio control is inappropriate, causes resulting cementitious material performance poor, shrinkage is undesirable, and cementitious material is caused to answer
It uses in the products preparation process such as concrete, concrete product inferior quality, especially contraction distortion value are larger.
Summary of the invention
In order to solve the above technical problems existing in the prior art, the present invention provides a kind of utilize made of ardealite not
Shrink cementitious material and preparation method thereof and concrete.
It is achieved particular by following technical scheme:
The first purpose of the invention is to provide using not shrinking cementitious material made of ardealite, by mixing material with
Ordinary portland cement mixes, wherein mixing material by weight percent meter ardealite 5-20%, flyash or phosphorus slag
30-60%, water-granulated slag 15-30%, steel slag 10-20% are mixed；Mixing material is with ordinary portland cement mass ratio
1-3:7-9。
It is preferred that the mixing material is by the ardealite 15% of weight percent meter, flyash or phosphorus slag 50%, water quenching mine
Slag 25%, steel slag 10% mixes.
It is preferred that the mixing material and ordinary portland cement mass ratio are 1:4.
It is preferred that SO in the ardealite3Content > 40%.
The second purpose of the invention is also to provide above-mentioned utilizing not shrinking cementitious material preparation made of ardealite
Ardealite after drying to constant weight, with flyash or phosphorus slag, water-granulated slag and steel slag combined grinding, is obtained mixing material by method, then
Ordinary portland cement is added to be uniformly mixed, cementitious material is not shunk in acquisition.
It is preferred that the mixing material specific surface area >=420m2/kg。
The third purpose of the invention is to provide above-mentioned cementitious material of not shrinking and applies in concrete preparation.
The invention specifically provide it is a kind of do not shrink high performance concrete, will not shrink cementitious material and rubble, sand,
Water and surfactant are mixed evenly, after being poured, vibrated, being conserved to get.
Specific: the proportion that do not shrink between cementitious material and rubble, sand, water and surfactant is by standard
JGJ55-2011 " design of common concrete proportioning regulation " carries out mix Design；It is described not shrink high-performance coagulation
The bulk density of soil is 2450~2500kg/m3；The binder total amount that do not shrink is 400~600kg/m3, water-cement ratio be 25~
38%, sand coarse aggregate ratio is 30~40%, and the dosage of surfactant is not shrink the 1~2% of binder total amount.
Compared with prior art, the technical effect of the invention is embodied in:
By to ardealite, flyash or phosphorus slag, water-granulated slag, steel slag carry out it is compound be configured to mixing material, and be added
Ordinary portland cement is prepared into cementitious material, so that ardealite obtains high value comprehensive utilization, it is ensured that do not shrink cementitious material
Al in middle ardealite and flyash, phosphorus slag, water-granulated slag, steel slag and cement2O3, hydrolysis product of cement Ca (OH)2Reaction is formed
Entringite AFt, filling and blocking inside concrete capillary slit are improved in conjunction with the mass percent control to material composition
The performance of cementitious material, so that concrete density is improved, and volume expansion can be generated after being applied in concrete, from
And obtain do not shrink high performance concrete while, reduce hydration heat of cement, save cement consumption, reduce concrete production at
This.
Cementitious material in the invention is the organic composite of air setting cementitious material and hydraulicity cementitious material, is improved
Traditional hydraulicity cementitious material shrinks big performance, improves the valence of comprehensive utilization of resources of the ardealite in the field of building materials
Value.
In building field, high performance concrete is compared with normal concrete, with spies such as higher intensity, durabilities
Sign, cause high performance concrete to be more difficult to prepare, while more demanding to raw material, the silicon powder mostly used greatly in the prior art and
Miberal powder is formulated, not only higher cost, but also as strength grade of concrete improves, shrinkage is increasing.Cause
This, the invention makes full use of large industrial solid castoff-ardealite preparation not shrink cementitious material, and will be resulting
Cementitious material is not shunk and rubble, sand and/or surfactant formulatory do not shrink high performance concrete out, and wherein ardealite is used
Between 5-20%, comply fully with country needs amount about the correlation standard of ardealite comprehensive utilization of resources and sustainable development
It wants.
The invention will not shrink cementitious material be used for prepare do not shrink high performance concrete when, rubble, sand, water
And the proportion between surfactant can be carried out by professional standard JGJ55-2011 " design of common concrete proportioning regulation "
Design.It is greater than 40% in the content that sulfur trioxide in ardealite described in cementitious material preparation is not shunk in the invention；Institute
The flyash quality stated meets GB/T 1596 " for the flyash in cement and concrete "；The phosphorus slag quality meets JC/
T 317 " concrete granulation electric furnace phosphoric slag powder "；The water-granulated slag quality meets GB/T 18046 " for cement and coagulation
Ground granulated blast furnace slag in soil "；The steel slag meets wanting for GB/T 20491 " for the steel-making slag powder in cement and concrete "
It asks；The ordinary portland cement quality meets the requirement of GB175 " common portland cement " 42.5 or 52.5 grades of ordinary portland cements.In this hair
Bright creation is not shunk in high performance concrete preparation, and the rubble meets GB/T14685-2011 " construction cobble, rubble "
Standard requirements, and maximum particle diameter≤25mm；The sand meets GB/T14684-2011 " construction sand " standard intraocular's chiltern
Amount requires；The surfactant qualities meet JG/T223 " polycarboxylate high performance water-reducing agent " standard requirements, that is, are exactly to adopt
Use polycarboxylate high performance water-reducing agent as surfactant.
In the invention do not shrink cementitious material be applied to concrete preparation in after, enable to preparation concrete
Slump be 18~25cm, compression strength is 50-80MPa, electric flux≤1000cc, free shrink after natural curing 28 days
Deformation values are between -0.2/ ten thousand~0.4/ ten thousand.
Specific embodiment
It is limited below with reference to specific embodiment technical solution of the present invention is further, but claimed
Range is not only limited to made description.
The cementitious material preparation method of not shrinking of the invention is by ardealite after drying to constant weight, with flyash or phosphorus
Slag, water-granulated slag and steel slag mixed grinding are to specific surface area >=420m2/ kg obtains mixing material feed powder, adds normal silicate water
Mud is uniformly mixed, and cementitious material is not shunk in acquisition；SO in ardealite3Content > 40%.During the preparation process, specific each original
Expect the proportion between ingredient according to described in following embodiments:
Embodiment 1
Cementitious material is mixed by mixing material and ordinary portland cement, and wherein mixing material is by weight percent meter
Mass mixings object 60%, water-granulated slag 15%, the steel slag 20% such as ardealite 5%, flyash and phosphorus slag mix；Mixing material
Material is 1:7 with 42.5 ordinary portland cement mass ratioes.
Embodiment 2
Cementitious material is mixed by mixing material and ordinary portland cement, and wherein mixing material is by weight percent meter
Ardealite 20%, phosphorus slag 30%, water-granulated slag 30%, steel slag 20% mix；Mixing material and 52.5 normal silicates
Cement quality ratio is 1:9.
Embodiment 3
Cementitious material is mixed by mixing material and ordinary portland cement, and wherein mixing material is by weight percent meter
Ardealite 20%, flyash 40%, water-granulated slag 30%, steel slag 10% mix；Mixing material and 42.5 common silicic acid
Salt cement mass ratio is 3:7.
Embodiment 4
Cementitious material is mixed by mixing material and ordinary portland cement, and wherein mixing material is by weight percent meter
Mass mixings object 50%, water-granulated slag 20%, the steel slag 15% such as ardealite 15%, flyash and phosphorus slag mix；Mixing
Material and 52.5 ordinary portland cement mass ratioes are 1:3.
Embodiment 5
Cementitious material is mixed by mixing material and ordinary portland cement, and wherein mixing material is by weight percent meter
Ardealite 5%, phosphorus slag 50%, water-granulated slag 25%, steel slag 20% mix；Mixing material and 42.5 normal silicate water
Mud mass ratio is 1:4.
Test 1: cementitious material addition test is not shunk
Concrete sample preparation: by rubble, sand with do not shrink cementitious material, water is mixed and is mixed thoroughly, between a variety of materials
Proportion can carry out mix Design by professional standard JGJ55-2011 " design of common concrete proportioning regulation ", wherein
The amount of admixing is mixed according to every cubic metre of additions 400kg cementitious material, water-cement ratio 25%, concrete density is by 2500 calculating, sand
Rate takes 30%, and surfactant volume is 1.5% to be matched, and is mixed evenly, be poured, vibrate, conserve to get；It adopts
Cementitious material, which is respectively that embodiment 1- embodiment 5 is resulting, does not shrink cementitious material.
Concrete performance measuring method: according to slump in the prior art and the resistance to compression after natural curing 28 days
Intensity；It is logical according to GB/T 50082 " Standard for test methods of longterm performance and durability of ordinary concrete standard " measurement concrete electric
Amount；According to freely receiving for GB/T 50082 " Standard for test methods of longterm performance and durability of ordinary concrete standard " measurement concrete
Compression deformation value.
Concrete indices measurement result: by the above-mentioned slump measured, compression strength, electric flux and free shrink
Deformation values count in the following table 1.
Table 1
Shown by the data of table 1 as it can be seen that the cementitious material of the invention be added to concrete preparation in, being capable of very big journey
The comprehensive performance of the improvement concrete of degree, improves the quality of concrete.
Test 2: different ratios of raw materials concrete performance examination test
Sample preparation:
On the basis of testing 1, on the basis of embodiment 1, the proportion of concrete material ingredient is made into following adjustment,
Prepare test specimen:
Sample 1: by rubble, sand with do not shrink cementitious material, water is mixed and is mixed thoroughly, the proportion between a variety of materials can be by row
Industry standard JGJ55-2011 " design of common concrete proportioning regulation " carries out mix Design, wherein the mixing amount of admixing
According to: every cubic metre of addition 600kg cementitious material, water-cement ratio 38%, sand coarse aggregate ratio are matched for 40%, equal through being mixed
It is even, be poured, vibrate, conserve to get；The cementitious material of use, which is respectively that embodiment 1 is resulting, does not shrink cementitious material.
Sample 2: by rubble, sand with do not shrink cementitious material, water is mixed and is mixed thoroughly, the proportion between a variety of materials can be by row
Industry standard JGJ55-2011 " design of common concrete proportioning regulation " carries out mix Design, wherein the mixing amount of admixing
According to: every cubic metre of addition 500kg cementitious material, water-cement ratio 38%, sand coarse aggregate ratio are matched for 40%, equal through being mixed
It is even, be poured, vibrate, conserve to get；The cementitious material of use, which is respectively that embodiment 1 is resulting, does not shrink cementitious material.
Sample 3: by rubble, sand with do not shrink cementitious material, water is mixed and is mixed thoroughly, the proportion between a variety of materials can be by row
Industry standard JGJ55-2011 " design of common concrete proportioning regulation " carries out mix Design, wherein the mixing amount of admixing
According to: every cubic metre of addition 480kg cementitious material, water-cement ratio 38%, sand coarse aggregate ratio are matched for 40%, equal through being mixed
It is even, be poured, vibrate, conserve to get；The cementitious material of use, which is respectively that embodiment 1 is resulting, does not shrink cementitious material.
Sample 4: on the basis of sample 1, addition account for do not shrink cementitious material quality 1% surfactant (such as:
The outstanding person Point-SS polycarboxylate high performance water-reducing agent of section).
Sample 5: on the basis of sample 1, addition account for do not shrink cementitious material quality 2% surfactant (such as:
The outstanding person Point-SS polycarboxylate high performance water-reducing agent of section).
Properties of sample measurement:
Bulk density, slump, the compression strength of natural curing 28 days, electric flux, free shrink is carried out to resulting sample to become
Shape value is detected, and result is as shown in table 2 below:
Table 2
It is shown by the data of table 2 as it can be seen that for being configured to concrete cementitious material and sandstone, water etc. will not be shunk,
It is added little with the influence of concrete comprehensive performance is compared；And in adding procedure, adding surfactant thereto, it will
The influence concrete comprehensive performance of high degree improves concrete charge pass and contraction distortion value.
Other unaccomplished matters of the invention are referring to conventional technical means in the art, common knowledge and existing technical literature
Disclosure is operated.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of do not shrink cementitious material using made of ardealite, which is characterized in that by mixing material and normal silicate water
Mud mixes, wherein mixing material by weight percent meter ardealite 5-20%, flyash or phosphorus slag 30-60%, water quenching
Slag 15-30%, steel slag 10-20% combined grinding form；Mixing material and ordinary portland cement mass ratio are 1-3:7-9.
2. not shrinking cementitious material using made of ardealite as described in claim 1, which is characterized in that the mixing material
Material is mixed by the ardealite 15% of weight percent meter, flyash or phosphorus slag 50%, water-granulated slag 25%, steel slag 10%.
3. not shrinking cementitious material using made of ardealite as described in claim 1, which is characterized in that the mixing material
Material is 1:4 with ordinary portland cement mass ratio.
4. not shrinking cementitious material using made of ardealite as claimed in claim 1 or 2, which is characterized in that the phosphorus
SO in gypsum3Content > 40%.
5. according to any one of claims 1-4 do not shrink cementitious material preparation method, feature using made of ardealite
It is, ardealite after drying to constant weight, with flyash or phosphorus slag, water-granulated slag and steel slag combined grinding, is obtained into mixing material feed powder,
It adds ordinary portland cement to be uniformly mixed, cementitious material is not shunk in acquisition.
6. not shrinking cementitious material preparation method using made of ardealite as claimed in claim 5, which is characterized in that described
Mixing material feed powder specific surface area >=420m2/kg。
7. according to any one of claims 1-4 utilize does not shrink cementitious material or such as claim 5 or 6 made of ardealite
The cementitious material of not shrinking of the method preparation is applied in concrete preparation.
8. one kind does not shrink high performance concrete, which is characterized in that utilize ardealite for according to any one of claims 1-4
It is manufactured do not shrink cementitious material or as claim 5 or 6 the methods prepare do not shrink cementitious material and rubble, sand,
Water and surfactant are mixed evenly, after being poured, vibrated, being conserved to get.
9. not shrinking high-performance contracting concrete as claimed in claim 8, it is characterised in that: it is described do not shrink cementitious material and
Proportion between rubble, sand, water and surfactant presses standard JGJ55-2011 " design of common concrete proportioning regulation "
Carry out mix Design；The bulk density for not shrinking high performance concrete is 2450~2500kg/m3；Described does not receive
Contracting binder total amount is 400~600kg/m3, water-cement ratio is 25~38%, and sand coarse aggregate ratio is 30~40%, the surface-active
Agent dosage is not shrink the 1~2% of binder total amount.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110981385A (en) * | 2019-11-28 | 2020-04-10 | 贵州大学 | Preparation method of lightweight moisture-proof phosphorus building gypsum block |
| CN110981335A (en) * | 2019-11-28 | 2020-04-10 | 新疆研科节能科技有限公司 | Preparation method and use method of novel concrete anti-cracking cementing material |
| CN112939558A (en) * | 2021-01-18 | 2021-06-11 | 昆明理工大学 | Floor tile material prepared from composite phosphogypsum and preparation method thereof |
| CN115368100A (en) * | 2022-09-22 | 2022-11-22 | 湖北工业大学 | Preparation method of special cementing material for high-content regenerated gypsum micro-expansion road base |
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| CN115368100B (en) * | 2022-09-22 | 2023-05-23 | 湖北工业大学 | Preparation method of special cementing material for high-doping-amount regenerated gypsum micro-expansion road base |
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