CN109095807A - A kind of concrete liquid super instant coagulant and preparation method thereof - Google Patents
A kind of concrete liquid super instant coagulant and preparation method thereof Download PDFInfo
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The present invention is suitable for concrete admixture field, a kind of concrete liquid super instant coagulant and preparation method thereof is provided, preparation method and equipment are simple and effective, it is easy to industrialized production, it is short using segmentation microwave reaction method time-consuming, efficiency is high, synthesis applied to nanoscale hydrated calcium silicate, the high-penetration of microwave field provides energy for the equal qualitative response of material, with to be quick on the draw, high quality, be conducive to shorten reaction process, and effectively control the partial size and agglomerating effect of product, in addition introduces Al after hydrated calcium silicate synthesis3+, after concrete is added, it is more conducive to accelerate the hydration reaction of cement glue material, improves the early strength of concrete.
Description
Technical field
The invention belongs to concrete admixture field more particularly to a kind of concrete liquid super instant coagulant and its preparation sides
Method.
Background technique
Concrete is the engineering material that usage amount is maximum, use scope is most wide in current architectural engineering in the world.Concrete
During practice of construction, early strength is developed slowly, and is even more needed to spend human and material resources and is conserved, this has enough to meet the need mold, work
Phase progress is all acid test.Especially during engineering first-aid repair and winter construction, the fast development of concrete strength is more
It is essential.
It constructs under low temperature or subzero temperature concrete, road, bridge and repairing, reinforcement engineering construction, prefabricated components and cement
In the outdoor production of product, in order to promote the early-stage development of concrete strength, accelerates mold turnover, promote working efficiency, generally
Following several methods: inorganic salts early strength agent, Early-strength polycarboxylate superplasticizer and novel crystal caryogram early strength agent can be used.
Early strength agent in patent CN106365488A is not only from a wealth of sources, price is lower, but also early strength function is obvious, generally
It all has blood coagulation enhancing effect and reduces freezing point effect.But the shortcomings that this inorganic salts early strength agent also fairly obvious, inorganic salts
Early strength agent is all electrolyte, generates compression to the diffusion layer of cement micelle structure, is unfavorable for the dispersion of Cement-water System,
Secondly, late strength of concrete can reduce.If volume is big, the side effects such as steel bar corrosion or alkali-aggregate reaction can be generated.
Patent CN103373831B synthesizes the Early-strength polycarboxylate superplasticizer with special branch by MOLECULE DESIGN.It is early strong
Agent polycarboxylate water-reducer is only limitted to weaken the retarding effect of common polycarboxylate water-reducer, can not promote in cement hydration process
Crystalline growth, therefore early strong effect is limited.
New liquid early strength agent in patent CN107673362A is calcium silicate hydrate nano nucleus (C-S-H), it can be with
Induced crystal nucleation, reduces the nucleation barrier of hydrolysis product of cement, accelerates the heat evolution velocity of hydrated product, to improve concrete
The development of early strength.
Currently, the preparation method of calcium silicate hydrate nano nucleus is broadly divided into three categories: hydro-thermal method, chemical precipitation method and micro-
Emulsion method.Aquation hot preparation calcium silicate hydrate nano crystalline substance and when time-consuming, energy consumption is high, and the calcium silicate hydrate nano generated is brilliant
The size of core is larger, causes early strong effect poor.Chemical precipitation method prepare need during calcium silicate hydrate nano nucleus to filter,
It dries and disperses again, need equipment investment more, and time-consuming, energy consumption is high.Microemulsion method needs can dissolve silicon source and calcium
Two kinds of reversed-phase emulsions in source, and suitable surfactant is needed to merge inverted emulsion, higher cost.
Summary of the invention
In view of the above problems, the purpose of the present invention is to provide a kind of concrete liquid super instant coagulant and preparation method thereof,
Aim to solve the problem that existing hydrated calcium silicate liquid super instant coagulant preparation process flow is complicated, time-consuming, at high cost, super instant coagulant pair
Early strength of concrete and the bad technical problem of later strength improvement effect.
On the one hand, a kind of preparation method of concrete liquid super instant coagulant includes the following steps:
Silicon source, water and dispersing agent are put into reaction vessel according to certain mass ratio, reaction vessel are set by step 1
It is stirred in microwave reactor；
Step 2 is added dropwise alkaline solution into reaction vessel and adjusts pH；
Step 3 prepares calcium source solution, and starting microwave reactor starts to be segmented microwave reaction, and reaction is simultaneously to reaction vessel
It is middle that the calcium source solution is added dropwise；
Aluminum soluble salt is added into reaction vessel after being segmented microwave reaction for step 4, continues stirring until aluminium
Salt is completely dissolved, and collecting solution in reaction vessel is concrete liquid super instant coagulant.
Specifically, silicon source described in step 1 is soluble silicate, fluosilicate, silica containing waste biomass
Any one in matter, the dispersing agent are naphthalenesulfonate formaldehyde condensation compound, carboxymethyl cellulose, methacrylic acid/olefin(e) acid first
Any one in ester PCE copolymer, propenyl ether PCE copolymer, amide/acid imide PCE copolymer, the stirring are machinery
Stirring, speed of agitator 200-1000r/min.
Specifically, the mass ratio of silicon source described in step 1 and water is 1:5~1:20, the quality of the silicon source and dispersing agent
Than for 50:1~1000:1.
Specifically, the microwave reactor power is 100-3000W.
Specifically, alkaline solution described in step 2 is soluble strong base solution, pH >=11 after adjusting.
Specifically, calcium source described in step 3 is solubility calcium salting liquid or the waste liquid for producing wooden calcium sulfonate, the calcium
The mass ratio of source and silicon source is 1:1~1:2.
Specifically, the segmentation microwave reaction is 2-5 sections, the microwave reaction time is 5s-60min.
Specifically, aluminum soluble salt described in step 4 is aluminium chloride, aluminum sulfate, any one in aluminum nitrate.
Specifically, the aluminum soluble salt and the mass ratio of calcium source are 1:5~1:10.
On the other hand, a kind of concrete liquid super instant coagulant, using a kind of preparation method of concrete liquid super instant coagulant
It is prepared.
Compared with prior art, the present invention having the beneficial effect that:
(1) short using segmentation microwave reaction method time-consuming, efficiency is high, applied to the synthesis of nanoscale hydrated calcium silicate, microwave
High-penetration provide energy for the equal qualitative response of material, with to be quick on the draw, high quality, be conducive to shorten
Reaction process, and effectively control the partial size and agglomerating effect of product；
(2) Al is introduced after hydrated calcium silicate synthesis3+, after concrete is added, it is more conducive to accelerate the water of cement glue material
Change reaction, improves the early strength of concrete；
(3) this preparation method and equipment are simple and effective, easy to industrialized production.
Detailed description of the invention
Fig. 1 is the preparation flow schematic diagram of liquid super instant coagulant of the invention；
Fig. 2 is that schematic diagram is built in the device of the invention simulation.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not under the conditions of making creative work
All other embodiment obtained, shall fall within the protection scope of the present invention.
C30 super high-early concrete is prepared with liquid super instant coagulant, wherein preparing 1m3330kg cement is added in concrete,
750kg river sand, 1150kg rubble, 140kg water, 3.5kg water-reducing agent, liquid super instant coagulant 16.5kg, C30 super high-early concrete
Raw material and specification it is as shown in table 1 below:
1 raw material of table and specification
| Raw material | Specification |
| Cement | Concrete admixture examines dedicated fiducial cement |
| Rubble | 5-31.5mm continuous grading rubble, lime stone, intensity > 120MPa |
| River sand | Middle sand, fineness modulus 2.4, clay content < 0.1% |
| Water-reducing agent | High performance water reducing agent of polyocarboxy acid, water-reducing rate >=30%, solid content 15% |
The C30 super high-early concrete the preparation method comprises the following steps: using forced mixer, be first added rubble and sand, it is rear plus
Enter cement, open forced mixer and stir 60s, add water, water-reducing agent and liquid super instant coagulant, continues stirring 120s and go out
Machine.
In conjunction with Fig. 1, Fig. 2, prepare the preparation method of liquid super instant coagulant used in above-mentioned C30 super high-early concrete specifically by
Following each embodiment illustrates respectively:
Embodiment one
33.92g sodium metasilicate is weighed in three-necked flask, 200ml distilled water is added, takes 0.6g dispersing agent naphthalene sulphonate formaldehyde
Condensation product is dissolved in calcium chloride solution and is added in three-necked flask, and three-necked flask is placed in microwave reactor, starts machinery and stirs
It mixes, revolving speed 500r/min, it is 13 that 1mol/L sodium hydroxide solution, which is added dropwise, and adjusts pH, separately weighs calcium chloride 17.76g and is dissolved into
Calcium source solution is made in 200ml water, starting microwave reactor carries out segmentation microwave reaction, and first segment microwave power is set as
1000w, reaction time 10s, second segment microwave power are set as 600w, reaction time 20s, and when reaction uses constant pressure addition
The calcium source solution is added into three-necked flask in 15s for funnel, and end of reaction is added 3.18g aluminium chloride and stirs up to dissolution,
Collecting three-necked flask reaction product is liquid super instant coagulant.Finally liquid super instant coagulant obtained prepares C30 in aforementioned manners
Super high-early concrete.
Embodiment two
Potassium silicate 24.64g is weighed in three-necked flask, 200ml distilled water is added, takes dispersing agent 0.3g carboxymethyl cellulose
Element is dissolved in calcium chloride solution and is added in three-necked flask, and three-necked flask is placed in microwave reactor, starts mechanical stirring, turns
Speed is 800r/min, and it is 12 that 1mol/L sodium hydroxide solution, which is added dropwise, and adjusts pH, separately weighs calcium nitrate 37.76g and is dissolved into 200ml
Calcium source solution is made in water, starting microwave reactor carries out segmentation microwave reaction, and first segment microwave power is set as 2000w, instead
Be 20s between seasonable, second segment microwave power is set as 1200w, reaction time 40s, when reaction using constant pressure funnel to
The calcium source solution is added in three-necked flask in 30s, the stirring of 11.98g ANN aluminium nitrate nonahydrate is added until molten in end of reaction
Solution, collecting three-necked flask reaction product is liquid super instant coagulant.Finally liquid super instant coagulant obtained is prepared in aforementioned manners
C30 super high-early concrete.
Embodiment three
Lithium metasilicate 14.40g is weighed in three-necked flask, 200ml distilled water is added, takes dispersing agent 0.8g propenyl ether PCE
Copolymer is dissolved in calcium chloride solution and is added in three-necked flask, and three-necked flask is placed in microwave reactor, starts machinery and stirs
It mixes, revolving speed 600r/min, it is 11 that 1mol/L sodium hydroxide solution, which is added dropwise, and adjusts pH, weighs calcium hypochlorite 22.88g and is dissolved into
Calcium source solution is made in 200ml water, starting microwave reactor carries out segmentation microwave reaction, and first segment microwave power is set as
150w, reaction time 40s, second segment microwave power are set as 120w, reaction time 60s, and when reaction uses constant pressure addition
The calcium source solution is added into three-necked flask in 50s for funnel, and end of reaction is added 8.2g aluminum sulfate and stirs up to dissolution,
Collecting three-necked flask reaction product is liquid super instant coagulant.Finally liquid super instant coagulant obtained prepares C30 in aforementioned manners
Super high-early concrete.
Example IV
Lithium metasilicate 14.40g is weighed in three-necked flask, 200ml distilled water is added, takes dispersing agent 0.9g amide/acid imide
PCE copolymer is dissolved in calcium chloride solution and is added in three-necked flask, and three-necked flask is placed in microwave reactor, starts mechanical
Stirring, revolving speed 700r/min, it is 12 that 1mol/L sodium hydroxide solution, which is added dropwise, and adjusts pH, weighs calcium bicarbonate 25.92g and is dissolved into
Calcium source solution is made in 200ml water, starts microwave reactor, first segment microwave power is set as 800w, reaction time 60s,
Second segment microwave power is set as 500w, reaction time 90s, when reaction using constant pressure funnel into three-necked flask
The calcium source solution is added in 75s, the stirring of 3.2g aluminium chloride is added until dissolution, collects three-necked flask reaction and produce in end of reaction
Object is liquid super instant coagulant.Finally liquid super instant coagulant obtained prepares C30 super high-early concrete in aforementioned manners.
The liquid super instant coagulant that concrete is prepared respectively using the embodiment of the present invention one, two, three, four is in different curing
Under compression strength, as shown in table 2, table 3 and table 4.
The intensity test result of the C30 concrete under 5 DEG C of curing conditions of table 2
The intensity test result of the C30 concrete under 10 DEG C of curing conditions of table 3
The intensity test result of the C30 concrete under 20 DEG C of curing conditions of table 4
Pass through the strength test data pair of blank and embodiment one, two, three, four under 5 DEG C, 10 DEG C and 20 DEG C curing conditions
Than it can be concluded that, using liquid super instant coagulant prepared by the present invention be applied to concrete, the morning of concrete can be significantly improved
Phase and later period compression strength have very high practical application meaning.
Comparative example one
33.92g sodium metasilicate is weighed in three-necked flask, 200ml distilled water is added, takes dispersing agent 0.6g naphthalene sulfonate first
Aldehyde condensate is dissolved in calcium chloride solution and is added in three-necked flask, starts mechanical stirring, and revolving speed 500r/min is added dropwise
It is 13 that 1mol/L sodium hydroxide solution, which adjusts pH, weighs calcium chloride 17.76g and is dissolved into 200ml water calcium source solution is made, instead
It is 60min between seasonable, the calcium source solution is added into three-necked flask in 30min using constant pressure funnel when reaction, instead
It should finish, the stirring of 3.2g aluminium chloride is added until dissolving, collecting three-necked flask reaction product is liquid super instant coagulant, is finally used
Liquid super instant coagulant made from the above method prepares C30 super high-early concrete.
The experiment of comparative example one is stirred to react using conventional mechanical, and the experiment of embodiment one is using segmentation microwave reaction, reaction
The difference of product result is obvious, and the reaction product that comparative example one is tested has a macroscopic obvious particle, and what embodiment one was tested
Reaction product is uniform, and the concrete crushing strength of comparative example one and embodiment one is as shown in table 5.
The intensity test Comparative result of the C30 concrete of 5 comparative example one of table and embodiment one
It can be seen by the intensity test comparing result of the C30 concrete of comparative example one and embodiment one in table 5
Out, each age compression strength of comparative example one is below embodiment one, illustrates the liquid super hardening prepared under the conditions of popular response
Agent is good not as good as the liquid super instant coagulant effect prepared under the conditions of microwave reaction, illustrates that the partial size of liquid super instant coagulant is smaller, participates in
The activity of hydrated cementitious is better, therefore the smaller promotion for being more conducive to concrete strength of partial size of liquid super instant coagulant.
Comparative example two
33.92g sodium metasilicate is weighed in three-necked flask, 200ml distilled water is added, takes dispersing agent 0.6g naphthalene sulfonate first
Aldehyde condensate is dissolved in calcium chloride solution and is added in three-necked flask, and three-necked flask is placed in microwave reactor, starts mechanical
Stirring, revolving speed 500r/min, it is 13 that 1mol/L sodium hydroxide solution, which is added dropwise, and adjusts pH, weighs calcium chloride 17.76g and is dissolved into
Calcium source solution is made in 200ml water, starting microwave reactor carries out segmentation microwave reaction, and first segment microwave power is set as
1000w, reaction time 10s, second segment microwave power are set as 600w, reaction time 20s, and when reaction uses constant pressure addition
The calcium source solution is added into three-necked flask in 15s for funnel, and end of reaction, collecting three-necked flask reaction product is liquid
Super instant coagulant.Finally liquid super instant coagulant obtained prepares C30 super high-early concrete in aforementioned manners.
Aluminium chloride is added in the experiment of embodiment one, is not added with aluminium chloride in the experiment of comparative example two, the reaction product of the two exists
Less, the solidifying native compression strength of the coagulation of comparative example one and embodiment one is as shown in table 6 for difference in appearance.
The intensity test Comparative result of the C30 concrete of 6 comparative example one of table and embodiment one
It can be seen by the intensity test comparing result of the C30 concrete of comparative example two and embodiment one in table 6
Out, each age compression strength of comparative example two is below embodiment one, illustrates to be not added with the liquid super instant coagulant of aluminium salt preparation not
The liquid super instant coagulant effect for such as adding aluminium salt preparation is good, illustrates that aluminium salt participates in the liquid super instant coagulant of synthesis, is conducive to cement
Heat evolution velocity and the promotion for promoting concrete strength.
Comparative example three
33.92g sodium metasilicate is weighed in three-necked flask, 200ml distilled water is added, dispersing agent 0.6g polyethylene glycol is taken (to divide
6000) son amount is dissolved in calcium chloride solution and is added in three-necked flask, three-necked flask is placed in microwave reactor, starts mechanical
Stirring, revolving speed 500r/min, it is 13 that 1mol/L sodium hydroxide solution, which is added dropwise, and adjusts pH, weighs calcium chloride 17.76g and is dissolved into
Calcium source solution is made in 200ml water, starting microwave reactor carries out segmentation microwave reaction, and first segment microwave power is set as
1000w, reaction time 10s, second segment microwave power are set as 600w, reaction time 20s, and when reaction uses constant pressure addition
The calcium source solution is added into three-necked flask in 15s for funnel, and end of reaction is added 3.18g aluminium chloride and stirs up to dissolution,
Collecting three-necked flask reaction product is liquid super instant coagulant.
Using naphthalenesulfonate formaldehyde condensation compound as dispersing agent in embodiment one, with polyethylene glycol (molecular weight in comparative example three
It 6000) is dispersing agent, super instant coagulant stability prepared by embodiment one and comparative example three is as shown in table 7.
Super instant coagulant stability contrast prepared by 7 embodiment one of table and comparative example three
By the super instant coagulant stability contrast result of comparative example three and embodiment one in table 7 it can be concluded that, comparative example
Liquid super instant coagulant normal temperature storage 1 month of three starts to occur slightly settling, and storage has obvious sedimentation in 3 months；Embodiment one
Liquid super instant coagulant stores 6 months without sedimentation, and it is decisive to illustrate that suitable dispersing agent has the stability of liquid super instant coagulant
Effect.
C30 super hardening coagulation is prepared after different storage durations from the liquid super instant coagulant of embodiment one using comparative example three
The compression strength comparison of soil is as shown in table 8.
Super instant coagulant difference storage duration concrete performance comparison prepared by 8 embodiment one of table and comparative example three
The super instant coagulant difference storage duration concrete performance comparing result of comparative example three and embodiment one in table 8 can
To obtain, liquid super instant coagulant normal temperature storage 3 months of comparative example three start occur not having early strong effect after obviously settling, and also say
The stability of prescribed liquid super instant coagulant, which is applied to effect, to have a great impact, and the liquid super instant coagulant of embodiment one storage 6
It is not reduced without sedimentation, super hardening effect within a month.
In conclusion a kind of concrete liquid super instant coagulant of the invention and preparation method thereof is using segmentation microwave reaction method
Hydrated calcium silicate liquid super instant coagulant is prepared, the high-penetration of microwave field provides energy for the equal qualitative response of material, has to reaction
Sensitive, high quality, the strengthening effect of microwave field action can heat in specific region moment, increase at material heat
The freedom degree of reason, instantaneous high-temperature acts on while providing the tradition material property that heating processing procedure can not make, to be conducive to shorten
Reaction process, and effectively uniformly the partial size of refinement product, control agglomerating effect are added in concrete and promote cement hydration process
In crystalline growth, significantly improve early strength and later strength, in addition add aluminum soluble salt, it is whole to further increase concrete
Body intensity selects suitable dispersing agent to can be improved the stability of super instant coagulant, to guarantee the compression strength of concrete.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of preparation method of concrete liquid super instant coagulant, which comprises the following steps:
Silicon source, water and dispersing agent are put into reaction vessel according to certain mass ratio, reaction vessel are placed in micro- by step 1
It is stirred in wave reactor；
Step 2 is added dropwise alkaline solution into reaction vessel and adjusts pH；
Step 3 prepares calcium source solution, and starting microwave reactor starts to be segmented microwave reaction, and reaction is dripped into reaction vessel simultaneously
Add the calcium source solution；
Aluminum soluble salt is added into reaction vessel after being segmented microwave reaction for step 4, continues stirring until aluminium salt is complete
Fully dissolved, collecting solution in reaction vessel is concrete liquid super instant coagulant.
2. a kind of preparation method of concrete liquid super instant coagulant as described in claim 1, which is characterized in that described in step 1
Silicon source is any one in the silicate, fluosilicate, silica containing abandoned biomass of solubility, and the dispersing agent is
Naphthalenesulfonate formaldehyde condensation compound, carboxymethyl cellulose, methacrylic acid/e pioic acid methyl ester PCE copolymer, propenyl ether PCE copolymerization
Any one in object, amide/acid imide PCE copolymer, the stirring are mechanical stirring, speed of agitator 200-1000r/
min。
3. a kind of preparation method of concrete liquid super instant coagulant as claimed in claim 2, which is characterized in that described in step 1
The mass ratio of silicon source and water is 1:5~1:20, and the mass ratio of the silicon source and dispersing agent is 50:1~1000:1.
4. a kind of preparation method of concrete liquid super instant coagulant as claimed in claim 3, which is characterized in that the microwave reaction
Device power is 100-3000W.
5. a kind of preparation method of concrete liquid super instant coagulant as described in claim 1, which is characterized in that described in step 2
Alkaline solution is soluble strong base solution, pH >=11 after adjusting.
6. a kind of preparation method of concrete liquid super instant coagulant as described in claim 1, which is characterized in that described in step 3
Calcium source is solubility calcium salting liquid or the waste liquid for producing wooden calcium sulfonate, and the mass ratio of the calcium source and silicon source is 1:1~1:2.
7. a kind of preparation method of concrete liquid super instant coagulant as claimed in claim 6, which is characterized in that the segmentation microwave
Reaction is 2-5 sections, and the microwave reaction time is 5s-60min.
8. a kind of preparation method of concrete liquid super instant coagulant as described in claim 1, which is characterized in that described in step 4
Aluminum soluble salt is aluminium chloride, aluminum sulfate, any one in aluminum nitrate.
9. a kind of preparation method of concrete liquid super instant coagulant as claimed in claim 8, which is characterized in that the soluble aluminum
Salt and the mass ratio of calcium source are 1:5~1:10.
10. a kind of concrete liquid super instant coagulant, which is characterized in that using such as any one of claim 1-9 the method preparation
It obtains.
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| CN112010581A (en) * | 2020-07-21 | 2020-12-01 | 武汉理工大学 | Calcium silicate hydrate nanocrystal core suspension and preparation method thereof |
| CN112010581B (en) * | 2020-07-21 | 2021-11-12 | 武汉理工大学 | Calcium silicate hydrate nanocrystal core suspension and preparation method thereof |
| CN113583642A (en) * | 2021-08-30 | 2021-11-02 | 卫辉市化工有限公司 | Modified nano-silica early strength coagulant for oil well cement, preparation method and application thereof |
| CN113583642B (en) * | 2021-08-30 | 2022-09-23 | 卫辉市化工有限公司 | Modified nano-silica early strength coagulant for oil well cement, preparation method and application thereof |
| CN115557723A (en) * | 2022-11-21 | 2023-01-03 | 湖南大学 | Calcium silicate salt seed crystal colloid and preparation method thereof |
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