CN109053018A - A kind of feeding type concrete pump-feed agent and preparation method thereof - Google Patents
A kind of feeding type concrete pump-feed agent and preparation method thereof Download PDFInfo
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- CN109053018A CN109053018A CN201811101036.3A CN201811101036A CN109053018A CN 109053018 A CN109053018 A CN 109053018A CN 201811101036 A CN201811101036 A CN 201811101036A CN 109053018 A CN109053018 A CN 109053018A
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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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/40—Redox systems
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- Organic Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of feeding type concrete pump-feed agents and preparation method thereof, are related to building materials manufacturing technology；Feeding type concrete pump-feed agent is made of based on the percentage composition of raw material gross weight following each raw material: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 30%-55%, amino water-reducing agent 5%-15%, aliphatic water reducing agent 5%-10%, retarder 2%-6%, air entraining agent 0.3%-0.8%, isolation bleeding inhibitor 2%-10%, alum 1%-5%, sepiolite 0.5%-4% and water 19.2%-29.2%.Pumping admixture of the invention has intensity high, and performance is stablized, and has the advantages that high fluidisation, adhesive aggregation, lubrication, slow setting, and can effective water lock, diminishing is high-efficient；Also there is filling, blocking capillary slit, cut off capillary slit, macropore is made to become smaller, overall porosity reduces, can effective compensation concrete shrinkage, hence it is evident that the advantages of improving concrete initial value stability.
Description
Technical field
The present invention relates to building materials manufacturing technology more particularly to a kind of feeding type concrete pump-feed agent and its preparations
Method.
Background technique
Concrete is building materials important in construction industry, and the technique that general concrete construction site is all made of pumping is poured
Note needs concrete to have good mobility and pumpability；But since the concrete of mixing plant is by concrete mixer truck
It transports from mixing plant to construction site, once traffic jam or road are farther out, the overlong time for the concrete experience being stirred, meeting
Mobility heavy losses occur and can not pump.Concrete mix pump-conveying property is improved by addition pumping admixture as a result, is made
Concrete mix have can pass through conveyance conduit, not block, do not isolate, the good performance of visco-plasticity, existing pumping
Agent is usually combined by water-reducing agent, retarder, air entraining agent and lubricant etc..
Currently, existing concrete pump-feed agent visco-plasticity is not good enough, it is easy to happen isolation, bleeding, and due to concrete pump
It send agent there is bad adaptability, is typically only capable to adapt to a small number of cement types, mobility is bad, is precipitated under the conditions of winter low temperature brilliant
Body, precipitating, cause line clogging, can not normal use the problems such as.In addition, after concrete casting, due to the influence of surrounding medium,
Moisture loss is very fast, humidity decline, cannot fully meet the moisture that cement needs aquation in early days, and pump concrete early stage is produced from
Contraction, temperature contracting and drying shrinkage generate crack so as to cause concrete early stage；Moreover, as civil construction technology develops, to concrete
Requirement it is higher and higher, existing pumping admixture is not well positioned to meet concrete construction demand.
Summary of the invention
Therefore, in view of the above problems, it is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of intensity is provided
Height, pumpability is good, and has filling, blocking capillary slit, and overall porosity reduces, can effective compensation concrete shrinkage, hence it is evident that mention
The feeding type concrete pump-feed agent of high concrete initial value stability；In addition, the present invention also provides a kind of feeding type concrete
The preparation method of pumping admixture.
The technical solution that the present invention solves above-mentioned technical problem technology is as follows: a kind of feeding type concrete pump-feed agent, by original
The percentage composition meter for expecting total weight, be made of following each raw material: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 30%-55%, amino subtract
Aqua 5%-15%, aliphatic water reducing agent 5%-10%, retarder 2%-6%, air entraining agent 0.3%-0.8%, isolation bleeding suppression
Preparation 2%-10%, alum 1%-5%, sepiolite 0.5%-4% and water 19.2%-29.2%.
The beneficial effects of the present invention are: containing naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent, amino water-reducing agent and rouge in pumping admixture
Fat race water-reducing agent, improves late strength of concrete, will not make to form biggish bubble in concrete, improve the pump of concrete
The property sent and mobility and pumpability are kept in the long period；Contain retarder in pumping admixture, can increase concrete plasticity and
Intensity is suitble to the concrete of production high-strength or state type；Contain air entraining agent in pumping admixture, is introduced in concrete a certain amount of
Be uniformly distributed, be closed, independent micro-bubble, on the one hand inhibit or weaken secreting of occurring in casting process of fresh concrete
Water, on the other hand the ice crystal not only to freeze provides certain expansion space, but also provides one for the osmotic pressure of subcooled water
Cushion space, so that the freezing tolerance of concrete is improved, it is applied widely.
Moreover, containing sepiolite and alum, sepiolite and alum compatibility in pumping admixture of the invention, make this reality
That applies a pumping admixture has getting up early and late expansion effect, so that certain microdilatancy is generated in inside concrete, in Behavior of Hardened Cement Paste
Portion and interface with thick (thin) aggregate, reinforcing bar, by the crowd in-out effects of microdilatancy, whole compactness is improved, hydrated product
It is filled with the hole of concrete.Therefore, the feeding type concrete pump-feed agent of the present embodiment has the shape of filling, blocking capillary slit
At cutting capillary slit makes macropore become smaller, and overall porosity reduces, and can effectively reduce, compensating concrete is shunk, hence it is evident that improve mixed
Solidifying soil initial value stability.Furthermore in pumping admixture also containing isolation bleeding inhibitor, can effective water lock, improve concrete
Anti- isolation, anti-bleeding, played in concrete water conservation, thickening double effects, for improving concrete workability.
In addition, based on the above technical solution, the present invention can also be improved as follows, can also have following additional
Technical characteristic.
Further, the feeding type concrete pump-feed agent of the present embodiment, based on the percentage composition of raw material gross weight, by following each
Raw material composition: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 40%, amino water-reducing agent 10%, aliphatic water reducing agent 8%, retarder 4%,
Air entraining agent 0.5%, isolation bleeding inhibitor 6%, alum 3%, sepiolite 2.2% and water 26.3%.
Further, the retarder is sugar calcium, Icing Sugar, sodium tripolyphosphate, maltodextrin, calgon, sucrose or Portugal
Any one in grape sodium saccharate.
Further, the air entraining agent is any one in neopelex or saponin powder.
Further, the partial size of the sepiolite is 30-60nm.Sepiolite can be effectively retained in concrete, and with dampening
Change and carry out slow release partial moisture, provides water source for the aquation of cement and alum, improve cement fluidity, promote cement
Aquation reduces cement consumption.
In addition, including the following steps: the present invention also provides a kind of preparation method of feeding type concrete pump-feed agent
(1) based on the percentage composition of raw material gross weight, the following raw material is weighed: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 30%-
55%, amino water-reducing agent 5%-15%, aliphatic water reducing agent 5%-10%, retarder 2%-6%, air entraining agent 0.3%-0.8%,
Isolate bleeding inhibitor 2%-10%, alum 1%-5%, sepiolite 0.5%-4% and water 19.2%-29.2%；
(2) then first naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent, amino water-reducing agent and aliphatic water reducing agent are stirred with being pumped into
It mixes and stirs 30-40min in tank, add retarder stirring 10-20min, continue that isolation bleeding inhibition is added under stirring
10-20min is stirred in agent, and alum, sepiolite and water are added later and stirs 40-60min；
(3) after completely dissolution, air entraining agent is added in the component wait be added, and after stirring 20-30min, stands 30-50min, most
Gone out afterwards with pumping, feeding type concrete pump-feed agent can be obtained.
Further, the retarder is sodium gluconate.
Further, the air entraining agent is saponin powder.
Further, the isolation bleeding inhibitor is made of: third based on the percentage composition of raw material gross weight following each raw material
Olefin(e) acid 17%-24%, acrylamide 4%-6%, initiator 0.05%, oxidant 1.3%-1.5%, reducing agent 1.1%-
1.3%, chain-transferring agent 0.005%-0.008%, alkali 5%-10%, surplus are water.Specifically, the initiator of the present embodiment is selected
Sodium hydrogensulfite or ammonium persulfate, oxidant select potassium permanganate or hydrogen peroxide, reducing agent preferred vitamin C, chain-transferring agent excellent
Select mercaptopropionic acid, the preferred sodium hydroxide of alkali.
Specific embodiment
Principles and features of the present invention are described below in conjunction with specific embodiment, example is served only for explaining this hair
Bright, still, the invention may also be implemented in other ways than those described herein, therefore, protection of the invention
Range is not limited by the specific embodiments disclosed below.
Embodiment 1:
The feeding type concrete pump-feed agent of the present embodiment, based on the percentage composition of raw material gross weight, by following each raw material group
At: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 55%, amino water-reducing agent 5%, aliphatic water reducing agent 5%, sodium gluconate 2%, soap
Angle glycosides powder 0.3%, isolation bleeding inhibitor 2%, alum 1%, sepiolite 0.5% and water 29.2%.
Sodium gluconate in the present embodiment can use sugar calcium, Icing Sugar, sodium tripolyphosphate, maltodextrin, hexa metaphosphoric acid
One of sodium, sucrose are replaced；Saponin powder in the present embodiment can be replaced using neopelex,
The water of the present embodiment is underground water.
In addition, the preparation method of the feeding type concrete pump-feed agent of the present embodiment, includes the following steps:
(1) based on the percentage composition of raw material gross weight, the following raw material is weighed: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 55%,
Amino water-reducing agent 5%, aliphatic water reducing agent 5%, sodium gluconate 2%, saponin powder 0.3%, isolation bleeding inhibitor 2%,
Alum 1%, sepiolite 0.5% and water 29.2%；
(2) then first naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent, amino water-reducing agent and aliphatic water reducing agent are stirred with being pumped into
It mixes and stirs 40min in tank, add sodium gluconate stirring 15min, continue that isolation bleeding inhibitor is added under stirring
10min is stirred, alum, sepiolite and water are added later and stirs 50min；
(3) after completely dissolution, saponin powder is added in the component wait be added, and after stirring 25min, stands 50min, finally uses
Pumping goes out, and can obtain feeding type concrete pump-feed agent.
The sepiolite and alum compatibility of the present embodiment, make the present embodiment pumping admixture there is getting up early and late expansion to make
With, so that certain microdilatancy is generated in inside concrete, the interface inside Behavior of Hardened Cement Paste and with thick (thin) aggregate, reinforcing bar, by
The crowd in-out effects of microdilatancy, whole compactness are improved, and hydrated product is filled with the hole of concrete.Therefore, the present embodiment
Feeding type concrete pump-feed agent have filling, blocking capillary slit formation, cut off capillary slit, so that macropore is become smaller, total hole
Gap rate reduces, and can effectively reduce, compensating concrete is shunk, hence it is evident that improve concrete initial value stability.
In addition, the embodiment of the present invention isolation bleeding inhibitor is to be made of organic polymer and compounding agent, wherein described
High-molecular organic material is acrylic acid, acrylamide, and the group of the compounding agent is divided into initiator, oxidant, reducing agent, chain tra nsfer
Agent, alkali；The organic polymer is made of: acrylic acid 17%- based on the percentage composition of raw material gross weight following each raw material
24%, acrylamide 4%-6%；The compounding agent is made of following each raw material: causing based on the percentage composition of raw material gross weight
Agent 0.05%, oxidant 1.3%-1.5%, reducing agent 1.1%-1.3%, chain-transferring agent 0.005%-0.008%, alkali 5%-
10%；Surplus is water.Specifically, the initiator of the present embodiment selects sodium hydrogensulfite or ammonium persulfate, oxidant selects Gao Meng
Sour potassium or hydrogen peroxide, reducing agent preferred vitamin C, the preferred mercaptopropionic acid of chain-transferring agent, the preferred sodium hydroxide of alkali.
Specifically, the preparation method of the isolation bleeding inhibitor of the present embodiment, step is:
(1) in terms of the percentage composition of total weight, ammonium persulfate or sodium hydrogensulfite 0.05%, sodium hydroxide are weighed respectively
5%, acrylic acid 17%-20%, water 40% are added to together in the four-hole boiling flask equipped with thermometer, blender and Dropping feeder,
It stirs evenly；
(2) in terms of the percentage composition of total weight, weighing concentration respectively is 5% hydrogen peroxide or potassium permanganate 1.3%-1.5%
As oxidant, reducing agent vitamin C 1.1%-1.3% and mercaptopropionic acid 0.005%-0.008% are added drop-wise to step together
(1) in solution made from, control reaction 1-1.5 hours obtains the solution for generating the Sodium Polyacrylate for having macromolecule；
(3) in terms of the percentage composition of total weight, acrylic acid 5% is weighed respectively, acrylamide 4%-6%, water 23%, further
And be added in solution made from step (2), the reaction was continued 4-6 hours, stands 1 hour；
(4) sodium hydroxide is added into solution made from step (3), the pH value for adjusting solution is that 6-8 secretes to get to isolation
Water inhibitor product.
Specifically, the isolation bleeding inhibitor of embodiment can be prepared as follows: (1) with the percentage composition of total weight
Meter, weighs sodium hydrogensulfite 0.05% respectively, sodium hydroxide 5%, acrylic acid 20%, and water 40% is added to together equipped with temperature
In the four-hole boiling flask of meter, blender and Dropping feeder, stir evenly；
(2) in terms of the percentage composition of total weight, potassium permanganate 1.6%, vitamin C 1.2% and mercaptopropionic acid are weighed respectively
0.008%, it is added drop-wise in solution made from step (1) together, control reaction 1.5 hours, obtaining generating has the poly- of macromolecule
The solution of sodium acrylate；
(3) in terms of the percentage composition of total weight, acrylic acid 5% is weighed respectively, acrylamide 5%, water 22.142%, further
And be added in solution made from step (2), the reaction was continued 4.5 hours, stands 1 hour；
(4) sodium hydroxide is added into solution made from step (3), adjusts the pH value of solution and is secreted for 7.3 to get to isolation
Water inhibitor product.
Embodiment 2:
The feeding type concrete pump-feed agent of the present embodiment, based on the percentage composition of raw material gross weight, by following each raw material group
At: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 40%, amino water-reducing agent 10%, aliphatic water reducing agent 8%, sodium gluconate 4%, soap
Angle glycosides powder 0.5%, isolation bleeding inhibitor 6%, alum 3%, sepiolite 2.2% and water 26.3%.
The present embodiment is by upper component proportionally feeding, and the preparation method is the same as that of Example 1 for the present embodiment；The present embodiment uses
Isolation bleeding inhibitor can with embodiment 1, the sodium gluconate of the present embodiment can using sugar calcium, Icing Sugar, sodium tripolyphosphate,
One of maltodextrin, calgon, sucrose are replaced；Saponin powder in the present embodiment can use dodecyl
Benzene sulfonic acid sodium salt is replaced.
Embodiment 3:
The feeding type concrete pump-feed agent of the present embodiment, based on the percentage composition of raw material gross weight, by following each raw material group
At: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 30%, amino water-reducing agent 15%, aliphatic water reducing agent 10%, sodium gluconate 6%,
Saponin powder 0.8%, isolation bleeding inhibitor 10%, alum 5%, sepiolite 4% and water 19.2%.
The present embodiment is by upper component proportionally feeding, and the preparation method is the same as that of Example 1 for the present embodiment；The present embodiment uses
Isolation bleeding inhibitor can with embodiment 1, the sodium gluconate of the present embodiment can using sugar calcium, Icing Sugar, sodium tripolyphosphate,
One of maltodextrin, calgon, sucrose are replaced；Saponin powder in the present embodiment can use dodecyl
Benzene sulfonic acid sodium salt is replaced.
The performance test results of feeding type concrete pump-feed agent obtained by the present embodiment 1-3 see the table below:
The performance indicator of feeding type concrete pump-feed agent obtained by 1 embodiment 1-3 of table
The performance of feeding type concrete pump-feed agent obtained by the present embodiment 1-3 is according to JC474-2008 " mortar, concrete water-proof
Agent " performance detected, in upper table, stability be by inspection net slurry test result, setting time difference be by inspection concrete with
The difference of normal concrete, other data are the ratio by inspection concrete and normal concrete in table；"-" expression shifts to an earlier date.
It is verified by many experiments, naphthalene sulfonic acid-formaldehyde condensation product diminishing is contained in feeding type concrete pump-feed agent of the invention
Agent, amino water-reducing agent and aliphatic water reducing agent, improve late strength of concrete, will not make to form biggish gas in concrete
Bubble improves the pumping of concrete and keeps mobility and pumpability in the long period；In addition, containing slow setting in pumping admixture
Agent can increase the plasticity and intensity of concrete, be suitble to the concrete of production high-strength or state type；Contain in pumping admixture and draws
Gas agent, introduced in concrete it is a certain amount of be uniformly distributed, be closed, independent micro-bubble, on the one hand inhibit or weaken newly mix
The bleeding that concrete occurs in casting process, on the other hand the ice crystal not only to freeze provides certain expansion space, but also is
The osmotic pressure of subcooled water provides a cushion space, to improve the freezing tolerance of concrete.Furthermore also contain in pumping admixture
Have isolation bleeding inhibitor, can effective water lock, improve the anti-isolation of concrete, anti-bleeding, played in concrete water conservation,
Double effects are viscosified, for improving concrete workability；Suitable for preparing the high-strength concrete constructed under the conditions of subzero temperature, big stream
The winter construction of dynamic property concrete, commerical ready-mixed concrete, pump concrete.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of feeding type concrete pump-feed agent, which is characterized in that based on the percentage composition of raw material gross weight, by following each raw material
Composition: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 30%-55%, amino water-reducing agent 5%-15%, aliphatic water reducing agent 5%-10%,
Retarder 2%-6%, air entraining agent 0.3%-0.8%, isolation bleeding inhibitor 2%-10%, alum 1%-5%, sepiolite
0.5%-4% and water 19.2%-29.2%.
2. a kind of feeding type concrete pump-feed agent according to claim 1, which is characterized in that by the percentage of raw material gross weight
Content meter is made of: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 40%, amino water-reducing agent 10%, aliphatic diminishing following each raw material
Agent 8%, retarder 4%, air entraining agent 0.5%, isolation bleeding inhibitor 6%, alum 3%, sepiolite 2.2% and water
26.3%.
3. a kind of feeding type concrete pump-feed agent according to claim 1 or 2, which is characterized in that the retarder is sugar
Any one in calcium, Icing Sugar, sodium tripolyphosphate, maltodextrin, calgon, sucrose or sodium gluconate.
4. a kind of feeding type concrete pump-feed agent according to claim 1 or 2, which is characterized in that the air entraining agent is ten
Any one in dialkyl benzene sulfonic acids sodium or saponin powder.
5. a kind of feeding type concrete pump-feed agent according to claim 1 or 2, which is characterized in that the grain of the sepiolite
Diameter is 30-60nm.
6. a kind of preparation method of feeding type concrete pump-feed agent, which comprises the steps of:
(1) based on the percentage composition of raw material gross weight, the following raw material is weighed: naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent 30%-55%,
Amino water-reducing agent 5%-15%, aliphatic water reducing agent 5%-10%, retarder 2%-6%, air entraining agent 0.3%-0.8%, isolation
Bleeding inhibitor 2%-10%, alum 1%-5%, sepiolite 0.5%-4% and water 19.2%-29.2%；
(2) then first by naphthalene sulfonic acid-formaldehyde condensation product water-reducing agent, amino water-reducing agent and aliphatic water reducing agent with being pumped into agitator tank
Middle stirring 30-40min adds retarder stirring 10-20min, continues the addition isolation bleeding inhibitor under stirring and stirs
10-20min is mixed, alum, sepiolite and water are added later and stirs 40-60min；
(3) after completely dissolution, air entraining agent is added in the component wait be added, and after stirring 20-30min, stands 30-50min, finally uses
Pumping goes out, and can obtain the feeding type concrete pump-feed agent.
7. a kind of preparation method of feeding type concrete pump-feed agent according to claim 6, it is characterised in that: the slow setting
Agent is sodium gluconate.
8. a kind of preparation method of feeding type concrete pump-feed agent according to claim 6, which is characterized in that the bleed
Agent is saponin powder.
9. a kind of preparation method of feeding type concrete pump-feed agent according to claim 6, which is characterized in that the isolation
Bleeding inhibitor is made of: acrylic acid 17%-24%, acrylamide based on the percentage composition of raw material gross weight following each raw material
4%-6%, initiator 0.05%, oxidant 1.3%-1.5%, reducing agent 1.1%-1.3%, chain-transferring agent 0.005%-
0.008%, alkali 5%-10%, surplus are water.
10. a kind of preparation method of feeding type concrete pump-feed agent according to claim 9, which is characterized in that described
Chain-transferring agent is mercaptopropionic acid.
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| CN111704388A (en) * | 2020-06-11 | 2020-09-25 | 贵州凯襄新材料有限公司 | Concrete retarder and preparation method thereof |
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| CN111704388A (en) * | 2020-06-11 | 2020-09-25 | 贵州凯襄新材料有限公司 | Concrete retarder and preparation method thereof |
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