CN109704615A - Pumping of prostressed duct agent, preparation method and grouting material - Google Patents
Pumping of prostressed duct agent, preparation method and grouting material Download PDFInfo
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- CN109704615A CN109704615A CN201910069426.5A CN201910069426A CN109704615A CN 109704615 A CN109704615 A CN 109704615A CN 201910069426 A CN201910069426 A CN 201910069426A CN 109704615 A CN109704615 A CN 109704615A
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Abstract
The present invention relates to the technical fields of grouting agent preparation, more particularly, to pumping of prostressed duct agent, preparation method and grouting material.It includes the following components and weight proportion: 35-43 parts of mountain flour, 8-12 parts of water-reducing agent, 8-12 parts of plastic expansion agent, 8-12 parts of defoaming agent, 8-12 parts of silicon powder, 8-15 parts of quartz sand.It is found through experiment that can be compatible well with various cement using grouting agent made from above be formulated, and the grouting material prepared is also more stable, balanced, and bending and compressive strength is all higher after later period solidification；Using above-mentioned formula, the content of water-reducing agent is also reduced compared with the existing technology, and water-reducing agent is organic matter, pollution is be easy to cause in production process, the dosage for reducing water-reducing agent is also more environmentally protective.
Description
Technical field
The present invention relates to grouting agent preparation technical field, more particularly, to pumping of prostressed duct agent, preparation method and
Grouting material.
Background technique
Pumping of prostressed duct material is suitable for highway, railway, the municipal post stretching bonded prestress such as bridge and nuclear power station
Concrete pore passage mud jacking.In early days, the grouting agent that the grouting of domestic prestress pipe uses is generally neat slurry, when construction, uses
Cement, water, water-reducing agent, swelling agent etc. carry out extemporaneous preparation, and the grouting material of extemporaneous preparation must satisfy certain proportion, Cai Nengman
The indexs such as the compression strength after the maximum Qinshui rate of sufficient grouting material, viscosity and solidification, but the type of cement is relatively more,
It is matched according to the adjusting performance of cement, water-reducing agent, swelling agent, is easy to appear poor compatibility, cement and water-reducing agent bad adaptability, into
And lead to poor grouting material quality stability, poor fluidity, easily isolation layering.These problems not only influence to construct, but also
Directly concerning the durability and safety for arriving building structure.
In order to ensure the quality of grouting agent, many construction persons just in advance prepare pumping of prostressed duct agent in factory
It completes, then with cement mixing, forms sub- slurry, then transport to site operation, can be good at the proportion for controlling each component in this way,
The good comprehensive performance of grouting material is kept, but transportation cost in this way greatly improves, but also to calculate according to haulage time
Viscosity further improves production cost.
Summary of the invention
The purpose of the present invention one is to provide a kind of pumping of prostressed duct agent, has good compatibility with various cement,
Grouting agent and various cement extemporaneous preparation are realized, the grouting material comprehensive performance for preparing processing is also fine.
Mesh of the invention is one to be achieved by the following technical programs: pumping of prostressed duct agent, including with the following group
Point and weight proportion:
35-43 parts of mountain flour
8-12 parts of water-reducing agent
8-12 parts of plastic expansion agent
8-12 parts of defoaming agent
8-12 parts of silicon powder
8-15 parts of quartz sand.
By using above-mentioned technical proposal, it is found through experiment that, it can be with a variety of water using grouting agent made from above be formulated
Mud is compatible well, and the grouting material prepared is also more stable, balanced, the later period solidification after bending and compressive strength all more
It is high；Using above-mentioned formula, the content of water-reducing agent is also reduced compared with the existing technology, water-reducing agent is organic matter, in production process
It is be easy to cause pollution, the dosage for reducing water-reducing agent is also more environmentally protective.
Water-reducing agent is a kind of under conditions of maintaining concrete slump to be basically unchanged, and can be reduced the coagulation of mixing water amount
Native additive, in the application, Water-reducing Admixtures To Cements particle has peptizaiton, can improve its workability, reduces unit consumption of water, changes
The mobility of kind concrete mix；Or unit cement consumption is reduced, save cement.
Plastic expansion agent is that material is wanted based on bauxite mineral in a nitrogen atmosphere, the condition existing for charcoal and calcium oxide
Under, product surface treated is levigate after 1700 DEG C of high temperature sinterings forms, and product is yellow powder.Later period grouting agent and cement and
After water mixing, surface treated plastic expansion agent has certain hydrolytic resistance in cement hydration process, under alkaline condition
It is reacted with water and slowly generates gas, cement mixture can be made to expand before condensation.This expansion is containing by uniform dense distribution
Caused by the tiny bubble for having the mixed gas such as nitrogen class, acetylene, to concrete reinforcement non-corroding, harmless.Plastic expansion agent
Although volume is low, the uniform foam cell formed is fine and close；Plastic expansion agent is nontoxic, odorless, environmentally protective.Pass through plastic expansion agent
Addition play the role of good complementary contraction and being sufficient filling with cement gap in cement setting hardening, be conducive to the control temperature difference
Crack, the later period grouting material of preparation are not easy apparent volume contraction occur.
Defoaming agent has good defoaming and foam-inhibiting effect, later period not to allow during mixing with cement and water in the application
It is also easy to produce too many bubble, pressure-proof and snap-resistent intensity is more preferable after grouting material solidification.
Silicon powder is added according to the proportion of the application, the structure after capable of greatly increasing the grouting material solidification of later period formation is strong
Degree, impermeability is stronger, and salt resistance class corrosivity is also more preferable；And it will not significantly affect anti-after the grouting material solidification of later period formation
Jelly property.Silicon powder and water-reducing agent add jointly, are able to maintain the original fluidity of grouting agent, the more conducively mud jacking of increase later period formation
Structural strength after material solidification.
Quartz sand is a kind of hard, wear-resisting, stable chemical performance silicate mineral, it is found through experiment that, stone in the application
Sand is added with the fluidity for being conducive to increase grouting agent, makes material saturation, stablizes, equilibrium, the grouting material solidification that the later period is formed
Structural strength is also more preferable afterwards, plays the role of in formula vital.
The present invention is further arranged to: including following components and weight proportion:
35-43 parts of mountain flour
8-12 parts of water-reducing agent
8-12 parts of plastic expansion agent
8-12 parts of defoaming agent
8-12 parts of silicon powder
8-10 parts of quartz sand.
By using above-mentioned technical proposal, it is found through experiment that, using above-mentioned formula, every overall target of grouting agent is more
Good, stability is more preferable, and mobility is more preferable, bleeding rate 0 also more preferable with the compatibility of various cement, prepares the solidification of grouting material
Structural strength is also higher afterwards.
The present invention is further arranged to: including following components and weight proportion:
40 parts of mountain flour
10 parts of water-reducing agent
10 parts of plastic expansion agent
10 parts of defoaming agent
10 parts of silicon powder
10 parts of quartz sand.
By using above-mentioned technical proposal, it is found through experiment that, using above-mentioned formula, every overall target of grouting agent is more
Good, stability is more preferable, and mobility is more preferable, bleeding rate 0 also more preferable with the compatibility of various cement, prepares the solidification of grouting material
Structural strength is also higher afterwards, and relative cost is also relatively low.
The present invention is further arranged to: water-reducing agent, plastic expansion agent, defoaming agent, silicon powder and quartz sand weight ratio be 1:
1:1:1。
By using above-mentioned technical proposal, it is found through experiment that, using above-mentioned formula, every overall target of grouting agent is more
It is good.And it is not easy reunion, caking phenomenon occur during mixing, it is also more preferable with the compatibility of cement.
The present invention is further arranged to: wherein mountain flour is one or both of miberal powder and coal ash.
By using above-mentioned technical proposal, miberal powder is to be obtained after the process such as grinding with blast furnace slag through drying
High fineness, high activity powder is good concrete admixture and cement additive；Miberal powder has pozzolanic action, answers
For the application, resistance to compression, tension, the bending resistance, shearing strength of grouting agent can be increased；Also it is conducive to improve the workability of grouting agent,
Isolation and bleeding are reduced, reduces temperature difference of mass concrete variation and internal stress, inhibits the temperature difference and the crack that generates.It is able to suppress
Alkali-aggregate reaction improves the ability of grouting agent alkali resistant aggregate reaction significantly；Improve the pore structure in grouting agent, obtains aperture
To refine and be homogenized, impermeability, freeze-thaw resistance and the durability of concrete are improved.
Coal ash is the powder formed after coal-fired boiler combustion, main component SiO2、Al2O3、Fe3O4, FeO, there are also a small amount of
CaO, MgO etc. are conducive to save the cost instead of part of cement, and belong to waste utilization, more environmentally-friendly, the ingredient in coal ash
Conducive to the comprehensive performance for improving grouting agent.
The present invention is further arranged to: water-reducing agent is polycarboxylate water-reducer or naphthalene series high-efficiency water-reducing agent.
By using above-mentioned technical proposal, the compatibility of polycarboxylate water-reducer and various cement is good, the slump of concrete
Retention property is good, conducive to the construction time for extending concrete；Volume is low, and water-reducing rate is high, and contraction is small, can increase substantially coagulation
The early stage of soil, later strength.Polycarboxylate water-reducer chloride ion content is low, alkali content is low, is conducive to the durability of concrete, uses
Polycarboxylic acid salt's water-reducing agent can replace cement with more slags or flyash, to reduce cost.
Naphthalene series high-efficiency water-reducing agent is the non-research work of air entrained type high efficiency water reducing agent through chemical industry synthesis.The contracting of chemical name naphthalene sulphonate formaldehyde
Object is closed, it has very strong peptizaiton for cement particle.In concrete strength and the essentially identical slump, cement consumption can be reduced
10-25%；When the ratio of mud is constant, concrete initial slump is set to improve 10cm or more, water-reducing rate is up to 15-25%；To concrete
There is significant early strong, reinforcing effect, intensity increase rate is 20-60%；Improve the workability of concrete, improves concrete comprehensively
Physical and mechanical property；It is good to various cement adaptabilities, it is good with other all types of concrete admixture compatibilities.
The purpose of the present invention two is to provide a kind of preparation method of pumping of prostressed duct agent, the grouting agent prepared and more
Kind cement has good compatibility, realizes grouting agent and various cement extemporaneous preparation, the grouting material for preparing processing is comprehensive
It can also very well.
Mesh of the invention is two to be achieved by the following technical programs: prestress pipe pressure described in above scheme
Starch the preparation method of agent, comprising the following steps:
Step 1: it is spare to weigh above-mentioned each component；
Step 2: mountain flour, silicon powder and silica flour to be added water and stirred to the mixture for being formed uniformly paste, then by mixture in nitrogen gas
It is heated under atmosphere, after being heated to mixture solidification, then is ground into pulverulent mixture；
Step 3: remaining component is added in pulverulent mixture obtained in step 2, stir evenly.
By using above-mentioned technical proposal, mountain flour, silicon powder and silica flour mix more uniform, then nitrogen after adding water to mix
Heating is conducive to the air in removal hole in atmosphere, and the pulverulent mixture ingredient after grinding is uniform, and particle is also uniform, is convenient for
Later period mixes with the uniform of other components.
The present invention is further arranged to: control heating temperature increases 10 DEG C per minute, and last heating temperature is to 60-70 DEG C
When, constant temperature is kept for 1 hour；The speed that is passed through of nitrogen is 5ml/s.
By using above-mentioned technical proposal, temperature raising is too fast, and moisture evaporation can be than very fast, and mixture is easy to form more
The compaction rate of hole, grouting agent can be declined；Using above-mentioned heating rate and heating temperature, slow, the mixing of moisture evaporation
The hole that object is formed is few；Nitrogen be flowing can also take away partial air, vacuum effectiveness is more preferable.
The purpose of the present invention three is to provide a kind of pumping of prostressed duct material, has good compatibility with various cement,
Grouting agent and various cement extemporaneous preparation are realized, the grouting material comprehensive performance for preparing processing is also fine.
Mesh of the invention is three to be achieved by the following technical programs: pumping of prostressed duct material, characterized in that packet
Include following components and weight proportion:
8-10 parts of pumping of prostressed duct agent described in above scheme
72-90 parts of cement
22.4-28 parts of water.
By using above-mentioned technical proposal, it is found through experiment that, the grouting material mobility formed using said ratio is more preferable, and 24
Hour bleeding rate is 0,3 hours steel wire letter bleeding rates also not 0, and the structural strength after grouting material solidification is also very high.
The present invention is further arranged to: the weight proportion of grouting agent and cement is 1:9, the parts by weight of grouting agent and cement it
With with the weight part ratio of water be 1:0.28.
By using above-mentioned technical proposal, it is found through experiment that, the grouting material integrated performance index formed using said ratio
More preferably.
In conclusion advantageous effects of the invention are as follows:
1. it is found through experiment that grouting agent made from the application can be compatible well with various cement, and the pressure prepared
Slurry is also more stable, balanced, and bending and compressive strength is all higher after later period solidification；Using above-mentioned formula, compared with the existing technology
The content of water-reducing agent is also reduced, water-reducing agent is organic matter, and pollution is be easy to cause in production process, reduces the dosage of water-reducing agent
It is more environmentally protective.
2. mountain flour, silicon powder and silica flour add water mix after mix it is more uniform, then in nitrogen atmosphere heating be conducive to removal
Air in hole, the pulverulent mixture ingredient after grinding is uniform, and particle is also uniform, convenient for the equal of later period and other components
Even mixing.
3. bleeding rate is within 24 hours it is found through experiment that the grouting material mobility that grouting agent made from the application is formed is more preferable
0,3 hour steel wire letter bleeding rate also not 0, the structural strength after grouting material solidification is also very high.
Specific embodiment
Mountain flour, water-reducing agent, plastic expansion agent, defoaming agent, silicon powder, quartz sand pass through commercially available acquisition.
Mountain flour is preferably that one or both of miberal powder and coal ash water-reducing agent are preferably polycarboxylate water-reducer or naphthalene series high-efficiency
Water-reducing agent, polycarboxylate water-reducer are preferably the GQ-101 high-efficiency water-reducing agent of poly-carboxylic acid of the high-strength building materials Co., Ltd production in Shandong, skill
Art parameter is as follows:
Appearance: faint yellow or brown liquid.
Solid content >=20%.
Chloride ion content < 0.05%.
Paste flowing degree >=240 ㎜.
Naphthalene series high-efficiency water-reducing agent is preferably the naphthalene series high-efficiency water-reducing agent-B of Qingdao Hong Sha high molecular material Co., Ltd production,
Main component is β base naphthalene sulfonate carbinol condensation object, is a kind of non-air-entraining water-reducing agent.Technical parameter is as follows:
Appearance: pulvis brownish yellow powder.
Solid content: pulvis >=92%.
PH value (5% aqueous solution): 7-9.
Sodium sulphate content: pulvis 16-19%.
Flowing degree of net paste of cement: >=200mm.
In the identical ratio of mud, it is possible to increase concrete slump 10cm or more.
When keeping slump constant, water-reducing rate is up to 12-20%.
There is significant early strong, reinforcing effect to concrete, intensity increase rate is 15-40%.
The physical and mechanical property that concrete can be improved comprehensively can save cement 10-20% when keeping intensity identical.
Reinforcing bar non-corroding is acted on.
Plastic expansion agent is preferably Beijing along the plastic expansion agent for building industrial engineering technology Co., Ltd production, technical parameter
It is as follows: appearance: yellow crystalline powder；
Performance density: 300-600g/l；
Average grain diameter: 3.9 ± 0.6 μm；
Chloride ion content: less than a ten thousandth.
Defoaming agent is preferably the THIX-568 cement mortar defoamer of Heng Xin Chemical Manufacture, and technical parameter is as follows:
Appearance: milky white liquid
PH value: 6.0-8.0
Centrifugal stability: being preferably the mortar and concrete SILICA FUME of eastern blue star production without layering silicon powder.
Quartz sand is glass sand, SiO2 >=99.9%, Fe2O3≤0.001%.
Below in conjunction with table and embodiment, invention is further described in detail.
Pumping of prostressed duct agent, component and weight proportion see the table below:
| Miberal powder | Polycarboxylate water-reducer | Plastic expansion agent | Defoaming agent | Silicon powder | Quartz sand | |
| Embodiment 1 | 35 | 8 | 8 | 8 | 8 | 8 |
| Embodiment 2 | 35 | 10 | 10 | 10 | 10 | 10 |
| Embodiment 3 | 35 | 12 | 12 | 12 | 12 | 15 |
| Embodiment 4 | 40 | 10 | 10 | 10 | 10 | 10 |
| Embodiment 5 | 40 | 12 | 12 | 12 | 12 | 15 |
| Embodiment 6 | 43 | 12 | 12 | 12 | 12 | 15 |
| Embodiment 7 | 40 | 8 | 10 | 10 | 8 | 10 |
| Comparative example 1 | 40 | 10 | 10 | 10 | 10 | 0 |
| Comparative example 2 | 40 | 10 | 10 | 10 | 10 | 25 |
Embodiment 8
Pumping of prostressed duct agent, embodiment 8 and embodiment 4 are the difference is that replace with naphthalene system height for polycarboxylate water-reducer
Imitate water-reducing agent.
Embodiment 9
Pumping of prostressed duct agent, embodiment 9 and embodiment 4 are the difference is that replace with coal ash for miberal powder.
The preparation method of pumping of prostressed duct agent weighs each component according to upper table, and each component is uniformly mixed.
Pumping of prostressed duct material, by grouting agent made from embodiment 1-9 and comparative example 1-3 and the dedicated cement of highway,
Water is mixed, and wherein the weight proportion of grouting agent and cement is 1:9, weight of the sum of the parts by weight of grouting agent and cement with water
Part obtains pumping of prostressed duct material than being 1:0.28.
The indices of pumping of prostressed duct material are detected, and grouting material is made into test block and is detected, are detected
According to for JTG/T F50-2011 " highway bridge and culvert construction technique normalizing ", specifically data are as follows:
Remarks: the stability after placing 5 hours is mix with the dedicated road silicate cement of highway, water by grouting agent
5 hours, which are stood, after even sees if there is delamination.
It should be apparent that the setting time of embodiment 1-9 is qualified by above table, and presetting period and end
Solidifying time interval is short, only about wants 1 hour, conducive to the maintenance time cost and personnel cost for saving the later period, does not add in comparative example 1
Add quartz sand, initial set and final setting time interval have been lengthened to 4 hours, are unfavorable for commercial introduction；The weight of quartz sand in comparative example 2
Part account for it is relatively high, although the presetting period is reduced, initial set and final setting time interval be lengthened to 2 hours, also demonstrate
Quartz sand has a significant impact to the solidification of grouting material；The fluidity of embodiment 1-9 complies with standard value, and with the increasing of time
Long, fluidity obviously increases, convenient for construction；Although the fluidity of comparative example 1 complies with standard value, but initial flow degree, 30min
Less, whole fluidity is not that very well, construction increases for fluidity, the variation of 60min fluidity.Embodiment 1-9 is for 24 hours
Bleeding rate is 0,0.22MPa when straight Gao Du≤1.8m (duct hang down) and (duct 0.36MPa between free bleeding rate and 3h steel wire
Hang down straight Gao Du≤1.8m when) bleeding rate is respectively less than 2.0%, more closely knit after grouting material hardening, fullness degree is more preferable；Comparative example 1 is for 24 hours
Bleeding rate is greatly improved relative to embodiment 1-9 between free bleeding rate and 3h steel wire, and density is low after grouting material hardening, is filled
Degree of being full of is poor.The free swelling rate of embodiment 1-9 is fine, and grouting material pours into after pipeline also without obvious volume contraction, comparative example 2
Free swelling rate it is somewhat low, grouting material has apparent volume contraction after pouring into pipeline.The compression strength of embodiment 1-9 and anti-folding
Intensity is also apparently higher than standard；Although the compression strength and flexural strength of comparative example 1-2 substantially conforms to standard, but in this way to applying
The code requirement of work is higher, slightly not lack of standardization that standard value may be not achieved.
In embodiment 1-9, the integrated performance index of embodiment 4-9 is more preferable, and in embodiment 4-9, miberal powder is accounted in embodiment 4
Than bigger, be conducive to save the cost, although and some performance indicators of embodiment 5-9 are slightly better than embodiment 4, cost is also
Increase, therefore in actual production using embodiment 4 with more.Water-reducing agent is replaced by embodiment 8, uses coal ash in embodiment 9
There is not significant change instead of miberal powder integrated performance index.
The grouting agent that the application is also prepared embodiment 1-9 is placed 3 months, does not also occur the phenomenon that layering, stability is non-
Chang Hao.
It chooses grouting agent made from embodiment 4 to mix with various cement, specific mixing situation is as follows.
Embodiment 10
Grouting agent made from embodiment 4 is uniformly mixed, the weight proportion of grouting agent and cement by grouting material with dam cement, water
For 1:9, the weight part ratio of the sum of parts by weight of grouting agent and cement and water is 1:0.28.
Embodiment 11
Grouting material, 11 difference from Example 10 of embodiment are that dam cement replaces with ordinary portland cement.
Embodiment 12
Grouting material, 11 difference from Example 10 of embodiment are that dam cement replaces with portland slag cement.
Embodiment 13
Grouting material, 11 difference from Example 10 of embodiment are that dam cement replaces with Portland pozzolana cement.
The indices of grouting material made from embodiment 10-13 are detected, and grouting material is made into test block and is examined
It surveys, detection is according to for JTG/T F50-2011 " highway bridge and culvert construction technique normalizing ", specifically data are as follows:
It should be apparent that grouting agent made from embodiment 4 is mixed with various cement as upper table and all have good comprehensive performance
There is no need to prepare grouting material in factory in advance transportation cost is greatly saved, and preparation is adjusted flexibly according to the duration in index
The time of grouting material constructs more flexible.
Embodiment 14
The preparation method of pumping of prostressed duct agent, comprising the following steps:
Step 1: it is spare to weigh each component in embodiment 4；
Step 2: mountain flour, silicon powder and silica flour to be added water and stirred to the mixture for being formed uniformly paste, then by mixture in nitrogen gas
It is heated under atmosphere, after being heated to mixture solidification, then is ground into pulverulent mixture；
Step 3: remaining component is added in pulverulent mixture obtained in step 2, stir evenly.
Control heating temperature increases 10 DEG C per minute, when last heating temperature arrives 60-70 DEG C, constant temperature holding 1 hour；Nitrogen
The speed that is passed through of gas is 5ml/s.
Grouting agent prepared by embodiment 14 is uniformly mixed with the dedicated road silicate cement of highway, water, mud jacking
The weight proportion of agent and cement is 1:9, and the weight part ratio of the sum of parts by weight of grouting agent and cement and water is 1:0.28.
The indices of grouting material made from embodiment 14 are detected, and grouting material is made into test block and is detected,
Detection is according to for JTG/T F50-2011 " highway bridge and culvert construction technique normalizing ", specifically data are as follows:
The grouting material items overall target that the grouting agent and cement mixing prepared as can be seen from the above table by embodiment 14 obtains
It is significantly promoted, can be good at the safety and the practicability that guarantee construction, be convenient for commercial introduction.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (10)
1. pumping of prostressed duct agent, characterized in that including following components and weight proportion:
35-43 parts of mountain flour
8-12 parts of water-reducing agent
8-12 parts of plastic expansion agent
8-12 parts of defoaming agent
8-12 parts of silicon powder
8-15 parts of quartz sand.
2. pumping of prostressed duct agent according to claim 1, characterized in that including following components and weight proportion:
35-43 parts of mountain flour
8-12 parts of water-reducing agent
8-12 parts of plastic expansion agent
8-12 parts of defoaming agent
8-12 parts of silicon powder
8-10 parts of quartz sand.
3. pumping of prostressed duct agent according to claim 1, characterized in that including following components and weight proportion:
40 parts of mountain flour
10 parts of water-reducing agent
10 parts of plastic expansion agent
10 parts of defoaming agent
10 parts of silicon powder
10 parts of quartz sand.
4. pumping of prostressed duct agent according to claim 1, characterized in that water-reducing agent, plastic expansion agent, defoaming agent,
The weight ratio of silicon powder and quartz sand is 1:1:1:1.
5. pumping of prostressed duct agent according to claim 1, characterized in that wherein mountain flour is one in miberal powder and coal ash
Kind or two kinds.
6. pumping of prostressed duct agent according to claim 1, characterized in that water-reducing agent is polycarboxylate water-reducer or naphthalene system
High efficiency water reducing agent.
7. the preparation method of pumping of prostressed duct agent described in -6 any one according to claim 1, characterized in that including with
Lower step:
Step 1: it is spare to weigh above-mentioned each component；
Step 2: mountain flour, silicon powder and silica flour to be added water and stirred to the mixture for being formed uniformly paste, then by mixture in nitrogen gas
It is heated under atmosphere, after being heated to mixture solidification, then is ground into pulverulent mixture；
Step 3: remaining component is added in pulverulent mixture obtained in step 2, stir evenly.
8. the preparation method of pumping of prostressed duct agent according to claim 7, characterized in that every point of heating temperature of control
Clock increase 10 DEG C, last heating temperature arrive 60-70 DEG C when, constant temperature holding 1 hour；The speed that is passed through of nitrogen is 5ml/s.
9. pumping of prostressed duct material, characterized in that including following components and weight proportion:
8-10 parts of pumping of prostressed duct agent as claimed in any one of claims 1 to 6
72-90 parts of cement
22.4-28 parts of water.
10. pumping of prostressed duct material according to claim 9, characterized in that the weight proportion of grouting agent and cement is
The weight part ratio of the sum of parts by weight of 1:9, grouting agent and cement and water is 1:0.28.
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| CN111170703A (en) * | 2020-03-12 | 2020-05-19 | 湖南瑞弗斯科技发展有限公司 | Epoxy composite binary cement matrix system elastic concrete and preparation method thereof |
| CN112299791A (en) * | 2020-11-16 | 2021-02-02 | 上海宝冶工程技术有限公司 | Non-ignition concrete floor material |
| CN114751694A (en) * | 2022-04-12 | 2022-07-15 | 阳江海上风电实验室 | Cement grouting material suitable for marine environment and preparation method thereof |
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Application publication date: 20190503 |