CN112851162A - Cementing material and preparation method thereof - Google Patents
Cementing material and preparation method thereof Download PDFInfo
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- CN112851162A CN112851162A CN202110107398.9A CN202110107398A CN112851162A CN 112851162 A CN112851162 A CN 112851162A CN 202110107398 A CN202110107398 A CN 202110107398A CN 112851162 A CN112851162 A CN 112851162A
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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
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
- C04B11/262—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum
- C04B11/264—Gypsum from the desulfurisation of flue gases
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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
- C04B28/144—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 a flue gas desulfurization product
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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
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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
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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
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- 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
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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 invention discloses a cementing material and a preparation method thereof, belonging to the field of building materials. The cementing material comprises the following components in parts by weight: 50-60 parts of chlorine-containing fly ash, 10-20 parts of blast furnace granulated slag, 10-20 parts of carbide slag, 5-10 parts of desulfurized gypsum and 1-5 parts of early strength agent. The cementing material does not need additional cement, has high setting speed, has good compatibility of the early strength agent and the cementing material, can improve the early strength of the cementing material, and does not shrink backwards in the later period; meanwhile, chlorine ions in the fly ash are changed into waste for use, and the rapid curing effect of the waste is exerted; the fly ash is excited by adopting a combination mode of ball milling and chemical excitation, and the obtained cementing material has better performance.
Description
Technical Field
The invention relates to a cementing material and a preparation method thereof, belonging to the field of building materials.
Background
The fly ash as a building material is widely applied to concrete, prefabricated parts and the like, and has the advantages of improving the workability of the concrete, reducing the production cost, improving the later strength and the like. However, when the fly ash is used as a powder admixture in combination with a cementitious material such as cement, the disadvantages of slow solidification rate, low early strength and the like often occur, and the use of the fly ash is limited particularly in some fields in which early strength is pursued.
The main method for improving the early strength of the fly ash cementing material at the present stage is to add cement clinker or directly use the fly ash cementing material in combination with cement. Also a method for adding composite early strength agent, for example, patent CN201510977400.2, a micro-expansion early strength type low calcium fly ash base-activated material and a preparation method thereof, potassium sodium water glass is added as the early strength agent; patent CN201911260944.1, an early strength cement-based grouting material prepared from pre-hydrated fly ash and a preparation method thereof, add triethanolamine, lithium carbonate, and sodium sulfate as early strength agents.
Generally, chlorine ions contained in building materials are cured or the like to reduce diffusion of chlorine ions.
When the fly ash is used as a powder admixture and is matched with cementitious materials such as cement and the like, the fly ash has low solidification speed and low early strength, and has a retarding effect on the cement, so that the application range of the fly ash is limited. The early strength type cementing material prepared by using the fly ash as a main material has larger difference of early strength effect, and is generally divided into two types, wherein one type is that additional cement or cement clinker is directly compounded to achieve the early strength effect; the other is that the added early strength agent, such as alkali-activated agent, water glass and the like, is too violent in early excitation of the fly ash and can generate the phenomenon of later-stage retraction; and part of organic matters can change the operability of the cementing material and influence the construction. The chlorine-containing fly ash needs to be solidified by chlorine ions to reduce the content of the chlorine-containing fly ash due to the corrosion of the chlorine ions to reinforcing steel bars or iron-based appliances, and thus higher cost is generated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a fast-curing early-strength cementing material and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: the cementing material comprises the following components in parts by weight: 50-60 parts of chlorine-containing fly ash, 10-20 parts of blast furnace granulated slag, 10-20 parts of carbide slag, 5-10 parts of desulfurized gypsum and 1-5 parts of early strength agent.
The fly ash is a solid waste discharged in the combustion process of a boiler of a coal-fired power plant, and is fine particles which are discharged from a flue gas pipeline and captured after inorganic mineral substances in raw materials are subjected to a series of physicochemical changes such as burning, conversion, melting, cooling and the like after pulverized coal or coal slime and the like are combusted at a high temperature in a hearth. The gelatinization of fly ash in the preparation of cementitious materials mainly depends on the pozzolanic properties of the fly ash, i.e. active Al in the fly ash2O3And SiO2Under hydrothermal conditions with Ca (OH)2The property of C-S-H and C-A-H gel generated by the reaction is that calcium chloride can be generated by chloride ions contained in the chlorine-containing fly ash in the gelling reaction process, and in the formula, the calcium chloride can promote the gelling material to form calcium chloroaluminate, so that the hydration reaction of calcium silicate is accelerated while the chloride ions are solidified, and the early strength of the gelling material is improved.
The carbide slag is the waste slag discharged after acetylene is produced by hydrolyzing carbide, has the characteristics of high Ca content and strong alkalinity, can be well fused into the cementing material by using the carbide slag as an excitant and a Ca element supplement source in an alkali-activated cementing material system, and cannot influence the later effect of the cementing material.
The desulfurized gypsum is also called flue gas desulfurized gypsum and is an industrial byproduct gypsum obtained by desulfurizing and purifying flue gas generated by burning sulfur-containing coal in a boiler in a coal-fired power plant. The desulfurized gypsum mainly comprisesCaSO4·2H2The content of O is generally 92-95%. Desulfurized gypsum is a sulfate which can react with Ca (OH)2The calcium aluminate reacts with the aluminum-containing phase to generate an ettringite crystal, and the ettringite crystal grows in the gelled material to continuously fill pores, so that the compactness of the material is improved, and the mechanical property of the material is improved; the desulfurized gypsum is added into the cementing material, which is helpful to accelerate the crystal precipitation of the hydration product of the cementing material and shorten the induction period, thereby accelerating the increase of the compressive strength of the cementing material. The addition amount of the desulfurized gypsum in the composite cementing material cannot be too large, and the desulfurized gypsum is too much, so that more ettringite can be generated at the later hardening stage of the cementing material, thereby generating volume expansion, and finally possibly causing the hardened body of the cementing material to expand and crack.
The early strength agent is an additive which can improve the early strength of the gelled material and does not influence the later stability, and the traditional Chinese medicine effect of the early strength agent is to accelerate the hydration speed of the gelled material and promote the development of the early strength of the gelled material, so that the early strength agent has the early strength function and also has a certain water reducing and enhancing function.
As a preferred embodiment of the cementing material of the present invention, the early strength agent is 1 to 3 parts.
The early strength agent is an additive which can improve the early strength of the cementing material and does not influence the later stability, the addition amount is small, the early strength effect cannot be achieved, the excessive addition amount can cause the too fast curing speed of the cementing material and cause the dry cracking, meanwhile, the excessive addition of the early strength agent can slow down the later strength increase of the cementing material, and the main reason is that the early strength agent generates a large amount of ettringite phases such as hydrated calcium sulphoaluminate, hydrated calcium ferroaluminate and the like in the early excitation process, so that the early strength increase is obvious, but a large amount of accumulation of the ettringite can occupy the positions of main strength phases such as calcium silicate and the like, and the later strength increase is too slow or stops increasing. It is particularly important to select an appropriate amount of the early strength agent to be added.
As a preferred embodiment of the cementing material of the present invention, the early strength agent is 40 to 50 parts of aluminum ferric sulfate, 30 to 40 parts of sodium sulfate, 10 to 20 parts of potassium aluminate and 5 to 10 parts of sodium metaphosphate.
The addition of sodium sulfate to fly ash can produce dihydrate gypsum which is not stableExist and are readily compatible with CA3Very fast generation of C3A, the alkaline environment created by the generated NaOH can promote C3The A and the gypsum are dissolved in the solution, so that the generation amount of calcium sulphoaluminate is increased, the proportion of a solid phase in a liquid phase is increased, the cement hardening process is accelerated, and the early strength is improved. Al (Al)3+、Fe3+The high-valence cations have the early strength effect that the high-valence cations can compress a diffusion double electric layer of C-S-H colloid particles, accelerate the coagulation of C-S-H colloid so as to reduce the concentration of the C-S-H colloid in a liquid phase and increase the speed of continuous action of the fly ash and water. The phosphate can increase the fluidity of the cementing material, prolong the setting time and improve the strength of the cementing material.
In addition, the invention also provides a preparation method of the cementing material, which comprises the following steps:
(1) standing and aging the chlorine-containing fly ash, then placing the chlorine-containing fly ash into a ball mill for ball milling, and testing the specific surface area of the chlorine-containing fly ash after ball milling;
(2) uniformly stirring the chlorine-containing fly ash subjected to ball milling in the step (1) and other components, then placing the mixture into a ball mill for ball milling, and testing the specific surface area of the mixed material subjected to ball milling;
(3) and (3) standing and aging the mixed material obtained in the step (2) to obtain the gelled material.
The gelling activity of the fly ash is latent and can be quickly shown only under the excitation of certain measures. And performing ball milling on the fly ash to realize the activity excitation of the fly ash. The activation mechanism is mainly as follows: 1) through ball milling, the number of large particles in the fly ash is reduced, and the number of fine particles is increased, so that the lubricating effect and the homogenizing effect of the fly ash particles are improved, the particle grading of the fly ash particles is improved, and the physical activity of the fly ash is favorably displayed; 2) the specific surface area of the fly ash is improved through ball milling treatment, so that the effective contact area of the fly ash in a chemical reaction and the effective collision frequency of molecules in the reaction process are increased, and the chemical reaction of the fly ash is accelerated. Meanwhile, in the ball milling process of the fly ash, due to the action of mechanical energy, the crystal lattice energy of the fly ash is reduced, the internal network structure is damaged, a large number of chemical bonds such as Si-O, Al-O are broken, and a plurality of metastable and amorphous active Si and Al are formed at the broken positions of the bonds. The active Si and Al accelerate the volcanic ash activity reaction capability of the fly ash, and finally the chemical activity of the fly ash is improved. The invention changes the chloride ions contained in the raw materials into useful ones, does not need to specially remove the chloride ions in the fly ash, and can also exert the characteristic of quick solidification.
As a preferred embodiment of the method for preparing the cement of the present invention, the standing aging time in the step (1) is 7 days.
The performance of the chlorine-containing fly ash after ball milling is unstable, and the stable performance can be mixed with other components after the fly ash is subjected to standing and aging.
As a preferred embodiment of the preparation method of the gel material of the present invention, the ball milling conditions in the step (1) are as follows: the ball milling speed is 60-100r/min, and the ball milling time is 12-18 h.
During the ball milling process, chemical mechanical force can be formed to destroy the surface morphology of the fly ash, the glass body in the fly ash is destroyed, so that the active points are increased, and the chances of chemical reaction between the dissolved active ingredients in the fly ash and chemical substances in the surrounding environment are increased. The ball milling time has an optimal time, and the increase of the ball milling time in the optimal time can lead to large specific surface area and internal active SiO2And Al2O3Is easier to be released; if the ball milling time is too long, the over-milling phenomenon can occur, and the water demand can be increased due to the fact that the fly ash particles are too small.
As a preferred embodiment of the preparation method of the cementing material of the present invention, in the step (1), the specific surface area of the chlorine-containing fly ash is 400-500m2/kg。
After the fly ash is subjected to ultrafine grinding treatment, not only is the early activity of the fly ash greatly enhanced, but also the f-CaO in the fly ash particles is released, so that the fly ash particles can react with water to generate Ca (OH) before the materials are prepared2And the safety problem in the utilization process of the fly ash is solved. During ball milling and chemical excitation compounding, the grinding degree of the fly ash is moderate, and the finer the mechanical ball milling fly ash is, the higher the energy consumption is and the higher the cost is; at the same time compareThe fine fly ash particles are easy to agglomerate, which is not beneficial to subsequent chemical excitation.
As a preferred embodiment of the preparation method of the gel material of the present invention, in the step (2), the ball milling conditions are as follows: the ball milling speed is 60-100r/min, and the ball milling time is 24-30 h.
When the ball milling and the chemical excitation are compounded, the ball milling time has an optimal time, and the full combination of the active components of the fly ash and other materials can be improved along with the increase of the time in the optimal time; if the ball milling time is too long, the over-milling phenomenon can occur, and the water requirement can be increased due to the excessively small particles of the mixed material, so that the strength of the cementing material is influenced.
As a preferred embodiment of the preparation method of the cementing material of the present invention, in the step (2), the specific surface area of the mixed material is 550-600m2/kg。
The smaller the granularity of the mixed material is, the larger the specific surface area is, the gaps of particles can be mutually complemented in the hydration reaction process, the compactness of the particles of the gelled material is improved, and the strength of the gelled material is further enhanced.
As a preferred embodiment of the preparation method of the cement of the present invention, the standing aging time in the step (2) is 5 days. The prepared gelled material needs to be kept stand for aging, and the performance of the gelled material is stabilized.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a fast-curing early-strength cementing material and a preparation method thereof, the cementing material does not need additional cement, has higher solidification speed, has good compatibility of an early strength agent and the cementing material, can improve the early strength of the cementing material, and does not shrink backwards in the later period; meanwhile, chlorine ions in the fly ash are changed into waste for use, and the rapid curing effect of the waste is exerted; the fly ash is excited by adopting a combination mode of ball milling and chemical excitation, and the obtained cementing material has better performance.
Drawings
FIG. 1 is a flow chart of the preparation of the cement.
Detailed Description
The compositions of the gelled materials of examples 1-4 and comparative examples 1-4 are shown in Table 1, wherein the early strength agent comprises 40-50 parts of aluminum ferric sulfate, 30-40 parts of sodium sulfate, 10-20 parts of potassium aluminate and 5-10 parts of sodium metaphosphate.
The preparation method of the cementing materials of the examples 1-4 and the comparative examples 1-4 comprises the following steps:
(1) standing and aging the chlorine-containing fly ash for 7 days, then placing the fly ash into a ball mill for ball milling, and testing the specific surface area of the chlorine-containing fly ash after ball milling, wherein the ball milling rotating speed is 60-100r/min, the ball milling time is 12-18h, and the specific surface area of the chlorine-containing fly ash is 400-500m2/kg；
(2) Uniformly stirring the chlorine-containing fly ash subjected to ball milling in the step (1) and other components, then placing the mixture into a ball mill for ball milling, and testing the specific surface area of the mixed material subjected to ball milling, wherein the ball milling rotation speed is 60-100r/min, the ball milling time is 24-30 h, and the specific surface area of the mixed material is 550-600m2/kg；
(3) And (3) standing and aging the mixed material obtained in the step (2) for 5 days to obtain the gelled material.
The compression strength of the cementing materials prepared in the examples 1-4 and the comparative examples 1-4 is measured by GB/T17671-1999 Cement mortar Strength test method, and the results are shown in Table 1.
TABLE 1
As can be seen from Table 1, the early strength agent is added into the cementing material of the invention, so that the setting speed and the strength of the cementing material in one day can be obviously improved; however, the excessive addition of the early strength agent can slow down the later strength increase of the cementing material, mainly because the early strength agent generates a large amount of ettringite phases such as hydrated calcium sulfoaluminate, hydrated calcium ferroaluminate and the like in the early excitation process, so that the early strength is obviously increased, but a large amount of deposition of the ettringite can occupy the positions of main strength phases such as calcium silicate and the like, so that the later strength is slowly increased or stops increasing. In addition, the increase of the addition amount of the fly ash can lead the early strength of the cementing material to be increased slowly, but the later strength still has higher strength, which indicates that the fly ash has lower activity and can only play a role by specific excitation and long-time maintenance. The blast furnace granulated slag, the carbide slag, the gypsum and the like are also indispensable raw materials in the formula, and the later strength of the cementing material is low due to the small addition amount. As can be seen from Table 1, the cement of the present invention has a fast curing speed, a high early compressive strength and no reverse shrinkage in the later stage.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The cementing material is characterized by comprising the following components in parts by weight: 50-60 parts of chlorine-containing fly ash, 10-20 parts of blast furnace granulated slag, 10-20 parts of carbide slag, 5-10 parts of desulfurized gypsum and 1-5 parts of early strength agent.
2. The cementitious material of claim 1, wherein the early strength agent is 1 to 3 parts.
3. The cementitious material of claim 1 or 2, wherein the early strength agent is 40-50 parts of aluminum ferric sulfate, 30-40 parts of sodium sulfate, 10-20 parts of potassium aluminate and 5-10 parts of sodium metaphosphate.
4. A method for preparing a cementitious material as claimed in any one of claims 1 to 3, characterised in that it comprises the steps of:
(1) standing and aging the chlorine-containing fly ash, then placing the chlorine-containing fly ash into a ball mill for ball milling, and testing the specific surface area of the chlorine-containing fly ash after ball milling;
(2) uniformly stirring the chlorine-containing fly ash subjected to ball milling in the step (1) and other components, then placing the mixture into a ball mill for ball milling, and testing the specific surface area of the mixed material subjected to ball milling;
(3) and (3) standing and aging the mixed material obtained in the step (2) to obtain the gelled material.
5. The method for preparing the cement of claim 4, wherein the standing and aging time in the step (1) is 7 days.
6. The method for preparing the cement of claim 4, wherein the ball milling conditions in the step (1) are as follows: the ball milling speed is 60-100r/min, and the ball milling time is 12-18 h.
7. The method for preparing the cementing material of claim 4, wherein in the step (1), the specific surface area of the chlorine-containing fly ash is 400-500m2/kg。
8. The method for preparing the cementing material of claim 4, wherein in the step (2), the ball milling conditions are as follows: the ball milling speed is 60-100r/min, and the ball milling time is 24-30 h.
9. The method for preparing the cementing material of claim 4, wherein, in the step (2), the specific surface area of the mixed material is 550-600m2/kg。
10. The process for the preparation of cement according to claim, wherein the aging time in step (2) is 5 days.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307595A (en) * | 2021-06-17 | 2021-08-27 | 内蒙古工业大学 | Multi-element solid waste synergy-based geopolymer cementing material for pavement base and preparation method thereof |
| CN115353361A (en) * | 2022-07-13 | 2022-11-18 | 广东能源集团科学技术研究院有限公司 | Composite cementing material and preparation method and application thereof |
| CN117383843A (en) * | 2023-08-30 | 2024-01-12 | 福建源鑫建材有限公司 | High-strength all-solid waste cementing material and preparation method and application thereof |
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| 郑怀礼等: "无机高分子复合混凝剂聚合硫酸铝铁的制备与应用", 《重庆大学学报》 * |
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| CN115353361B (en) * | 2022-07-13 | 2023-11-28 | 广东能源集团科学技术研究院有限公司 | Composite cementing material and preparation method and application thereof |
| CN117383843A (en) * | 2023-08-30 | 2024-01-12 | 福建源鑫建材有限公司 | High-strength all-solid waste cementing material and preparation method and application thereof |
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