CN110386785A - Cement substitute composition and its preparation method and application - Google Patents
Cement substitute composition and its preparation method and application Download PDFInfo
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- CN110386785A CN110386785A CN201810366239.9A CN201810366239A CN110386785A CN 110386785 A CN110386785 A CN 110386785A CN 201810366239 A CN201810366239 A CN 201810366239A CN 110386785 A CN110386785 A CN 110386785A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag 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
- C04B7/24—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
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to the field of building materials, disclose cement substitute composition and its preparation method and application.A kind of cement substitute composition, with the total weight of cement substitute composition, cement containing 50-70 weight %, and the fly ash composition of 30-50 weight %, wherein, the fly ash composition contains D90 and is being greater than 8 μm in 8 μm of flyash I below and optional D90 and is being 90 μm of flyash II below, and with the total weight of cement substitute composition, the content of flyash I is greater than 10 weight %.In cement substitute composition of the invention, the addition content of flyash can achieve 50 weight %, and 28 days compression strength of sample are suitable with the compression strength of striaght cement.When the addition content of flyash is controlled in 30 weight %, 28 days compression strength of sample can reach 1.15 times of the compression strength of striaght cement.
Description
Technical field
The present invention relates to the field of building materials, and in particular to cement substitute composition and its preparation method and application.
Background technique
Flyash is one of the key industry solid waste in China, with the rapid development of power industry the annual institute of Hazards in Power Plant
The flyash total amount of discharge increases year by year.It is a kind of large industrial waste, but it is also a kind of have potential volcanic ash living
Property substance, therefore can be for used in building materials industry.Currently, application of China's flyash in the field of building materials specifically includes that road
Base packing material, materials for wall, pulverized fuel ash cement and concrete admixture etc..Although these methods can handle part flyash,
But it is low using level, the pozzolanic activity of flyash is not given full play to, flyash is prepared cement or mixed as cement concrete
The effective way that material is utilization of fly ash is closed, but dosage is limited.The flyash largely stockpiled not only land occupation, but also serious dirt
Environment has been contaminated, therefore, the utilization rate of flyash how has been improved and has become important topic urgently to be resolved using level.
Cement industry development in China's achieves very great achievement, but structural inconsistency, than more prominent, be mainly shown as: cement is raw
Production. art energy consumption is high, and specifically, cement production process needs " two mills one are burnt " technique；Influence to environment is mainly dust dirt
Dye, dust discharge amount account for 40% or so of national industrial trade dust emission total amount.Although environmental protection of the country to cement industry
Problem pay attention to day by day, the dust emission total amount in manufacture of cement reduce year by year, but pollution problem is still very serious.Majority shaft kiln at present
It is severely exceeded with the dust emission concentration of the hollow kiln enterprise of dry method.If substituting cement using flyash part, can not only subtract
Few dust pollution, moreover it is possible to reduce production energy consumption.
CN104370486A discloses high-performance composite materials activation superfined flyash preparation process and application, by second level or
The grinding aid progress intergrinding of the exciting agent of flyash weight 0.8%, 0.05% is added in three-level ash while superfine grinding,
Meeting less than 10 μm particles ratios is more than 95% or more.It will be mixed outside it in 32.5 cement in 10-20% and 42.5 cement
10-15% is uniformly mixed, and produced cement grade is constant.
CN102010143A discloses the preparation method for the modification second class powered coal ash in concrete, in concrete
The raw material composition and its weight percent of modified second class powered coal ash are as follows: second class powered coal ash 60-85%, superfine steel slag micropowder 10-
30%, semi-hydrated gypsum 3-12%.
CN103466977A discloses a kind of preparation method of substitutive raw material of cement, and flyash is added to water content and is
In the wet discharging carbide slag slag of 80-95%, flyash mixed dosage is to mix 14~20g flyash in the wet discharging carbide slag slag of every 100g.
But in currently existing scheme, the addition content of flyash is limited, is mostly 20% or so, when addition content reaches
After 30%, 28 days compression strength generally can all be lower than striaght cement sample and reach 30% in addition content even if selecting I grades of flyash
When, 28 days compression strength of sample at most can reach suitable with the compression strength of striaght cement.
Summary of the invention
The purpose of the invention is to overcome flyash mixed dosage of the existing technology low, the addition content of flyash reaches
After 30%, the problem of compression strength substantially reduces for 28 days of sample, cement substitute composition and its preparation method and application is provided,
In cement substitute composition of the invention, the addition content of flyash can achieve 50 weight %, and 28 days pressure resistances of sample
It spends suitable with the compression strength of striaght cement.When the addition content of flyash controls 28 days compression strength of sample in 30 weight %
1.15 times of the compression strength of striaght cement can be reached.
To achieve the goals above, first aspect present invention provides a kind of cement substitute composition, wherein is substituted with cement
The total weight of composition, the fly ash composition of the cement containing 50-70 weight % and 30-50 weight %, wherein institute
It states fly ash composition and contains D90 and be greater than 8 μm and in 8 μm of flyash I below and optional D90 for 90 μm of fine coal below
Grey II, and with the total weight of cement substitute composition, the content of flyash I is greater than 10 weight %.
Preferably, with the total weight of cement substitute composition, the content of flyash I is greater than 20 weight %.
Preferably, the composition of flyash I and the composition of flyash II are identical or different.
Preferably, the SiO containing 1-66 weight % in the composition of the flyash I2, 0-4 weight % TiO2, 1-41 weight
Measure the Al of %2O3, 1-7 weight % Fe2O3, 0-5 weight % FeO, 0-3 weight % MnO2, 1-4 weight % MgO, 1-17
The Na of CaO, 0.1-5 weight % of weight %2O, the K of 0.1-5 weight %2O, the P of 0-3 weight %2O5With the SO of 0-6 weight %3。
Preferably, the SiO containing 1-66 weight % in the composition of the flyash II2, 0-4 weight % TiO2, 1-41 weight
Measure the Al of %2O3, 1-7 weight % Fe2O3, 0-5 weight % FeO, 0-3 weight % MnO2, 1-4 weight % MgO, 1-17
The Na of CaO, 0.1-5 weight % of weight %2O, the K of 0.1-5 weight %2O, the P of 0-3 weight %2O5With the SO of 0-6 weight %3。
Preferably, the cement is ordinary portland cement, portland slag cement, Portland pozzolana cement, powder
One of coal ash portland cement and composite Portland cement are a variety of.
Preferably, the cement is ordinary portland cement.
Second aspect of the present invention provides a kind of preparation method of cement substitute composition, by the cement of 50-70 weight %
It is mixed with the fly ash composition of 30-50 weight %, wherein the fly ash composition contains D90 in 8 μm of powder below
Coal ash I and optional D90 is being greater than 8 μm and is being 90 μm of flyash II below, and with the total weight of cement substitute composition,
The content of flyash I is greater than 10 weight %.
Preferably, with the total weight of cement substitute composition, the content of flyash I is greater than 20 weight %.
Third aspect present invention provides application of the above-mentioned cement substitute composition as construction material.
By the present invention in that being greater than 8 μm in 8 μm of flyash I below and optional D90 with D90 and being 90 μm below
Flyash II, and limit with the total weight of cement substitute composition, the content of flyash I is greater than 10 weight %, preferably greatly
In 20 weight %, so that the addition content of flyash can achieve 50 weight %, the 28 of sample day compression strength still is able at this time
Reach the compression strength of striaght cement.The flyash additive amount of 50 weight % considerably increases the dosage of flyash, not only realizes
Waste utilization, and the production cost of cement is reduced, solve energy consumption height, the dust pollution question of manufacture of cement, and simultaneously
28 days compression strength is not reduced.In addition, if the addition content control of flyash exists with the total weight of cement substitute composition
When 30 weight %, 28 days compression strength of sample can reach 1.15 times of the compression strength of striaght cement.And in the present invention, resist
It is suitable with existing level to roll over intensity.
Specific embodiment
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
First aspect present invention provides a kind of cement substitute composition, wherein with the total weight of cement substitute composition,
The fly ash composition of cement containing 50-70 weight % and 30-50 weight %, wherein the fly ash composition contains
D90 is being greater than 8 μm and is being 90 μm of flyash II below in 8 μm of flyash I below and optional D90, and is substituted with cement
The content of the total weight of composition, flyash I is greater than 10 weight %.
In the preferred embodiment of the present invention, with the total weight of cement substitute composition, the content of flyash I is greater than
20 weight %.
In the present invention, D90 is obtained by cyclone classified method be greater than 8 μm in 8 μm of flyash I and D90 below and be
90 μm of flyash II below.The cyclone classified method is conventional method in that art, and details are not described herein.
In the present invention, the method for measuring the partial size of D90 is the method for this field routine, such as can be but be not limited to:
It is measured by laser particle analyzer.
In the present invention, the composition of flyash I can be identical or different with the composition of flyash II.Flyash of the invention
The composition of I and flyash II can be the chemical component of this field routine, limit without special.
Specifically, it can contain but be not limited in the composition of the flyash I: the SiO of 1-66 weight %2, 0-4 weight %
TiO2, 1-41 weight % Al2O3, 1-7 weight % Fe2O3, 0-5 weight % FeO, 0-3 weight % MnO2, 1-4 weight
Measure the Na of CaO, 0.1-5 weight % of MgO, 1-17 weight % of %2O, the K of 0.1-5 weight %2O, the P of 0-3 weight %2O5With
The SO of 0-6 weight %3。
It can contain but be not limited in the composition of the flyash II: the SiO of 1-66 weight %2, 0-4 weight % TiO2、
The Al of 1-41 weight %2O3, 1-7 weight % Fe2O3, 0-5 weight % FeO, 0-3 weight % MnO2, 1-4 weight %
The Na of CaO, 0.1-5 weight % of MgO, 1-17 weight %2O, the K of 0.1-5 weight %2O, the P of 0-3 weight %2O5With 0-6 weight
Measure the SO of %3。
In the present invention, the cement can be ordinary portland cement, portland slag cement, portland-pozzolana
One of cement, Portland fly ash cement and composite Portland cement are a variety of.
In a preferred embodiment, the cement is ordinary portland cement.The composition of the ordinary portland cement
Meet " GB175-2007 " standard.
Second aspect of the present invention provides a kind of preparation method of cement substitute composition, by the cement of 50-70 weight %
It is mixed with the fly ash composition of 30-50 weight %, wherein the fly ash composition contains D90 in 8 μm of powder below
Coal ash I and optional D90 is being greater than 8 μm and is being 90 μm of flyash II below, and with the total weight of cement substitute composition,
The content of flyash I is greater than 10 weight %.
Preferred embodiment according to the present invention, with the total weight of cement substitute composition, the content of flyash I is greater than
20 weight %.
Third aspect present invention provides application of the above-mentioned cement substitute composition as construction material.
Specifically, above-mentioned cement substitute composition can be but be not limited to as the application of construction material: fill out in roadbed
Fill the application in material, materials for wall, pulverized fuel ash cement and concrete admixture etc..
The present invention will be described in detail by way of examples below.
In embodiment and comparative example below,
(1) equipment used
(a) blender: JJ-5 type is purchased from Wuxi Jianyi Instrument Machinery Co., Ltd.；
(b) pressure-proof and snap-resistent all-in-one machine: model TYE-300D is purchased from Wuxi Jianyi Instrument Machinery Co., Ltd.；
(c) standard curing box for cement concrete: model HBY-40A type, dischargeable capacity 0.4m3, 65 × 50 × 130cm, purchase
From Wuxi Jianyi Instrument Machinery Co., Ltd.；
(d) laser particle analyzer: model 2000 is purchased from Malvern company.
(2) reference cement (ordinary portland cement) purchased from China Building Material Scientific Research General Institute cement science with it is novel
Architectural materials science research institute, composition are shown in Table 1.
Table 1
| Composition | SiO2 | TiO2 | Al2O3 | Fe2O3 | FeO | MnO | MgO | CaO | Na2O | K2O | P2O5 |
| Content % | 18.31 | 0.24 | 4.35 | 3.26 | 0 | 0.07 | 1.89 | 66.99 | 0.12 | 0.82 | 0.07 |
(3) flyash former ash is purchased from three river power plant of Shenhua Group subordinate, and composition is shown in Table 2, and particle diameter distribution is shown in Table 3.
Table 2
| Composition | SiO2 | TiO2 | Al2O3 | Fe2O3 | FeO | MnO | MgO | CaO | Na2O | K2O | P2O5 |
| Content % | 48.21 | 1.31 | 32.00 | 5.65 | 0 | 0.12 | 0.90 | 7.86 | 0.81 | 0.24 | 0.39 |
Table 3
| D10(μm) | D50(μm) | D90(μm) | Distribution (μm) | |
| Flyash former ash | 2.180 | 31.609 | 140.545 | 0.209~630.957 |
Preparation example 1
Flyash former ash is passed through into cyclone classified method, is separated by flyash clasfficiator, obtains D90 in 8 μm of powder below
Coal ash I, D90 are being greater than 8 μm and are being 90 μm of flyash II below.Wherein, flyash I and fine coal are measured by laser particle analyzer
The particle diameter distribution of grey II, the results are shown in Table 4.
Table 4
| D10(μm) | D50(μm) | D90(μm) | Distribution (μm) | |
| Flyash I | 0.701 | 2.849 | 5.972 | 0.209~13.183 |
| Flyash II | 6.468 | 29.034 | 83.611 | 0.209~158.489 |
Embodiment 1
The reference cement of 50 weight % is mixed with the fly ash composition of 50 weight %, wherein the flyash
Composition contains D90 and is being greater than 8 μm in 8 μm of flyash I and D90 below and is being 90 μm of flyash II below.It is replaced with cement
For the total weight of composition, the content of flyash I is 20 weight %, and the content of flyash II is 30 weight %, obtains cement
Substitute composition.
Water is added in cement substitute composition, distributed slurry is stirred on blender, slurry is put on jumping table
In stipulated time (2min), the circular diameter that measurement slurry is formed, control fluidity is 19.5cm, and sample is poured into three
Join in sample mould, spontaneous curing demoulds for 24 hours after molding, sample is put into standard curing box for cement concrete, temperature (20
± 1 DEG C), humidity >=90% or more is tested after 28 day age.
According to national standard GB/T 17671-1999,28 days compression strength is tested by pressure-proof and snap-resistent all-in-one machine, the results are shown in Table
5。
Embodiment 2
The reference cement of 50 weight % is mixed with the fly ash composition of 50 weight %, wherein the flyash
Composition contains D90 and is being greater than 8 μm in 8 μm of flyash I and D90 below and is being 90 μm of flyash II below.It is replaced with cement
For the total weight of composition, the content of flyash I is 10 weight %, and the content of flyash II is 40 weight %, obtains cement
Substitute composition.
According to the method for embodiment 1, the compression strength for testing 28 days, the results are shown in Table 5.
Embodiment 3
The reference cement of 50 weight % is mixed with the flyash I of 50 weight %, obtains cement substitute composition.
According to the method for embodiment 1, the compression strength for testing 28 days, the results are shown in Table 5.
Embodiment 4
The reference cement of 70 weight % is mixed with the fly ash composition of 30 weight %, wherein the flyash
Composition contains D90 and is being greater than 8 μm in 8 μm of flyash I and D90 below and is being 90 μm of flyash II below.It is replaced with cement
For the total weight of composition, the content of flyash I is 20 weight %, and the content of flyash II is 10 weight %, obtains cement
Substitute composition.
According to the method for embodiment 1, the compression strength for testing 28 days, the results are shown in Table 5.
Embodiment 5
The reference cement of 70 weight % is mixed with the fly ash composition of 30 weight %, wherein the flyash
Composition contains D90 and is being greater than 8 μm in 8 μm of flyash I and D90 below and is being 90 μm of flyash II below.It is replaced with cement
For the total weight of composition, the content of flyash I is 10 weight %, and the content of flyash II is 20 weight %, obtains cement
Substitute composition.
According to the method for embodiment 1, the compression strength for testing 28 days, the results are shown in Table 5.
Embodiment 6
The reference cement of 70 weight % is mixed with the flyash I of 30 weight %, obtains cement substitute composition.
According to the method for embodiment 1, the compression strength for testing 28 days, the results are shown in Table 5.
Comparative example 1
Using the reference cement of 100 weight %.
According to the method for embodiment 1, the compression strength for testing 28 days, the results are shown in Table 5.
Comparative example 2
The reference cement of 50 weight % is mixed with the fly ash composition of 50 weight %, wherein the flyash
Composition contains D90 and is being greater than 8 μm in 8 μm of flyash I and D90 below and is being 90 μm of flyash II below.It is replaced with cement
For the total weight of composition, the content of flyash I is 5 weight %, and the content of flyash II is 45 weight %, obtains cement and replaces
For composition.
According to the method for embodiment 1, the compression strength for testing 28 days, the results are shown in Table 5.
Comparative example 3
The reference cement of 50 weight % is mixed with the flyash II of 50 weight %, obtains cement substitute composition.
According to the method for embodiment 1, the compression strength for testing 28 days, the results are shown in Table 5.
Comparative example 4
The reference cement of 50 weight % is mixed with the flyash former ash of 50 weight %, obtains cement alternative combinations
Object.
According to the method for embodiment 1, the compression strength for testing 28 days, the results are shown in Table 5.
Comparative example 5
The reference cement of 70 weight % is mixed with the fly ash composition of 30 weight %, wherein the flyash
Composition contains D90 and is being greater than 8 μm in 8 μm of flyash I and D90 below and is being 90 μm of flyash II below.It is replaced with cement
For the total weight of composition, the content of flyash I is 5 weight %, and the content of flyash II is 25 weight %, obtains cement and replaces
For composition.
According to the method for embodiment 1, the compression strength for testing 28 days, the results are shown in Table 5.
Table 5
In cement substitute composition of the invention, the addition content of flyash can achieve 50 weight %, and the 28 of sample
Its compression strength is suitable with the compression strength of striaght cement.When flyash addition content control in 30 weight %, 28 days of sample
Compression strength can reach 1.15 times of the compression strength of striaght cement.
The preferred embodiment of the present invention has been described above in detail, and still, the present invention is not limited thereto.In skill of the invention
In art conception range, can with various simple variants of the technical solution of the present invention are made, including each technical characteristic with it is any its
Its suitable method is combined, and it should also be regarded as the disclosure of the present invention for these simple variants and combination, is belonged to
Protection scope of the present invention.
Claims (10)
1. a kind of cement substitute composition, which is characterized in that with the total weight of cement substitute composition, contain 50-70 weight
Measure % cement and 30-50 weight % fly ash composition, wherein the fly ash composition contain D90 8 μm with
Under flyash I and optional D90 be greater than 8 μm and be 90 μm of flyash II below, and with the total of cement substitute composition
The content of poidometer, flyash I is greater than 10 weight %.
2. cement substitute composition according to claim 1, wherein with the total weight of cement substitute composition, fine coal
The content of grey I is greater than 20 weight %.
3. cement substitute composition according to claim 1 or 2, wherein the composition of flyash I and the composition of flyash II
It is identical or different.
4. cement substitute composition according to claim 3, wherein contain 1-66 weight in the composition of the flyash I
Measure the SiO of %2, 0-4 weight % TiO2, 1-41 weight % Al2O3, 1-7 weight % Fe2O3, 0-5 weight % FeO, 0-
The MnO of 3 weight %2, 1-4 weight % MgO, 1-17 weight % CaO, 0.1-5 weight % Na2O, 0.1-5 weight %
K2O, the P of 0-3 weight %2O5With the SO of 0-6 weight %3。
5. cement substitute composition according to claim 3, wherein contain 1-66 weight in the composition of the flyash II
Measure the SiO of %2, 0-4 weight % TiO2, 1-41 weight % Al2O3, 1-7 weight % Fe2O3, 0-5 weight % FeO, 0-
The MnO of 3 weight %2, 1-4 weight % MgO, 1-17 weight % CaO, 0.1-5 weight % Na2O, 0.1-5 weight %
K2O, the P of 0-3 weight %2O5With the SO of 0-6 weight %3。
6. cement substitute composition according to claim 1, wherein the cement is ordinary portland cement, slag silicon
One of acid salt cement, Portland pozzolana cement, Portland fly ash cement and composite Portland cement are a variety of.
7. cement substitute composition according to claim 6, wherein the cement is ordinary portland cement.
8. a kind of preparation method of cement substitute composition, by the flyash group of the cement of 50-70 weight % and 30-50 weight %
It closes object to be mixed, wherein the fly ash composition contains D90 and is being greater than 8 in 8 μm of flyash I below and optional D90
μm and be 90 μm of flyash II below, and the content substituted with the total weight of cement substitute composition, flyash I in cement
Greater than 10 weight %.
9. according to the method described in claim 8, wherein, with the total weight of cement substitute composition, the content of flyash I is big
In 20 weight %.
10. application of the cement substitute composition as construction material described in any one of claim 1-7.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504746A (en) * | 2021-06-22 | 2022-12-23 | 国家能源投资集团有限责任公司 | Gelled material composition, gelled material, and preparation method and application thereof |
| CN115504729A (en) * | 2021-06-22 | 2022-12-23 | 国家能源投资集团有限责任公司 | Cementing material composition, cementing material, preparation method and application thereof |
| CN117105560A (en) * | 2023-09-12 | 2023-11-24 | 昆明理工大学 | Cement-based impervious additive for peat soil |
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| CN115504746A (en) * | 2021-06-22 | 2022-12-23 | 国家能源投资集团有限责任公司 | Gelled material composition, gelled material, and preparation method and application thereof |
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Application publication date: 20191029 |